Jens Petter Berg

• van der Meer, Dennis; Rahman, Mohammad Zillur; Ottas, Aigar; Parekh, Pravesh; Kutrolli, Gleda & Stinson, Sara Elizabeth [Show all 37 contributors for this article] (2025). Pleiotropic and sex-specific genetic mechanisms of circulating metabolic markers. Nature Communications. ISSN 2041-1723. 16(1). doi: 10.1038/s41467-025-60058-z.
• Waage, Christin; Jenum, Anne Karen; Mdala, Ibrahimu; Lee-?deg?rd, Sindre; Br?nd, Anja Maria & Sletner, Line [Show all 8 contributors for this article] (2025). Diabetes and prediabetes among women universally screened for gestational diabetes: a multi-ethnic, population-based, prospective study with eleven years follow-up. BMC Public Health. ISSN 1471-2458. 25(1). doi: 10.1186/s12889-025-22493-x. Full text in Research Archive
• Denver, Paul; Tortorelli, Lucas; Hov, Karen Roksund; Berg, Jens Petter; Giil, Lasse Melv?r & Nazmi, Arshed [Show all 12 contributors for this article] (2024). Chemokine associations with blood cerebrospinal fluid (CSF) barrier permeability and delirium. Brain, Behavior, and Immunity - Health (BBI - Health). ISSN 2666-3546. 43, p. 1¨C13. doi: 10.1016/j.bbih.2024.100920. Full text in Research Archive
• ?ystese, Kristin Astrid Berland; Olarescu, Nicoleta Cristina; Lindskog, Cecilia; Xheka, Fabjola; Berg-Johnsen, Jon & Berg, Jens Petter [Show all 8 contributors for this article] (2024). Stem cell-associated transcription factors in non-functioning pituitary neuroendocrine tumours. Free Neuropathology. ISSN 2699-4445. 5. doi: 10.17879/freeneuropathology-2024-5396. Full text in Research Archive
• Ree, Anne Hansen; Saltyte Benth, Jurate; Hamre, Hanne Mari; Kersten, Christian; Hofsli, Eva & Guren, Marianne [Show all 14 contributors for this article] (2024). First-line oxaliplatin-based chemotherapy and nivolumab for metastatic microsatellite-stable colorectal cancer¡ªthe randomised METIMMOX trial. British Journal of Cancer. ISSN 0007-0920. 130(12), p. 1921¨C1928. doi: 10.1038/s41416-024-02696-6. Full text in Research Archive
• N?ss-Andresen, Marthe-Lise; Jenum, Anne Karen; Berg, Jens Petter; Falk, Ragnhild S?rum & Sletner, Line (2023). The impact of recommending iron supplements to women with depleted iron stores in early pregnancy on use of supplements, and factors associated with changes in iron status from early pregnancy to postpartum in a multi-ethnic population-based cohort. BMC Pregnancy and Childbirth. ISSN 1471-2393. 23:350(1), p. 1¨C13. doi: 10.1186/s12884-023-05668-5.
• Jansen, Aina; Aaseth, Jan Olav; Lyche, Jan Ludvig; Berg, Jens Petter; M¨¹ller, Mette Helen Bj?rge & Lydersen, Stian [Show all 7 contributors for this article] (2022). Do changes in persistent organic pollutants after bariatric surgery cause endocrine disruption? Chemosphere. ISSN 0045-6535. 313, p. 1¨C8. doi: 10.1016/j.chemosphere.2022.137461. Full text in Research Archive Show summary

  Background Bariatric surgery results in weight loss, marked endocrine changes and the release of persistent organic pollutants (POPs). The release of POPs might cause endocrine disruption. The study aimed to explore associations between POPs and adiponectin, leptin and ghrelin in subjects undergoing bariatric surgery. Methods: The study included 63 subjects with severe obesity (men/women: 13/50), age (years): 45.0 (8.5), and BMI (kg/m2) 39.1 (3.4). Analyses of adiponectin, leptin and ghrelin and POPs (hexachlorobenzene (HCB), dichlorodiphenyldichloroethylene (p,p¡¯-DDE), polychlorinated biphenyl (PCB) 118 (dioxin-like compound; dl), and sum 6 PCB (PCB 28, -52, ?101, ?138, ?153, and ?180) were performed before and 12 months after bariatric surgery. Results: There were significant increases in adiponectin and all POPs and a fall in leptin after surgery. The main finding was the highly significant associations between adiponectin and all POPs. The increase in HCB explained 38% of the variation in adiponectin. Conclusions: If the POP-associated increase in adiponectin is a causal effect, the release of POPs might have important clinical consequences. Adiponectin has both positive and negative clinical effects exerted by essentially unknown mechanisms. The effects of released POPs on the metabolic functions in subjects undergoing bariatric surgery deserve further evaluation. ? 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

• N?ss-Andresen, Marthe-Lise; Jenum, Anne Karen; Berg, Jens Petter; Falk, Ragnhild S?rum & Sletner, Line (2022). Prevalence of postpartum anaemia and iron deficiency by serum ferritin, soluble transferrin receptor and total body iron, and associations with ethnicity and clinical factors: a Norwegian population-based cohort study. Journal of Nutritional Science (JNS). ISSN 2048-6790. 11. doi: 10.1017/jns.2022.45. Full text in Research Archive
• ?ystese, Kristin Astrid Berland; Casar-Borota, Olivera; Berg-Johnsen, Jon; Berg, Jens Petter & Bollerslev, Jens (2022). Distribution of E- and N-cadherin in subgroups of non-functioning pituitary neuroendocrine tumours. Endocrine. ISSN 1355-008X. 77(1), p. 151¨C159. doi: 10.1007/s12020-022-03051-6. Full text in Research Archive
• Kordt Sundet, Birgitte; Kreyberg, Ina; Staff, Anne Cathrine; Carlsen, Karin Cecilie L?drup; Bains, Karen Eline Stensby & Berg, Jens Petter [Show all 20 contributors for this article] (2022). The effect of nicotine-containing products and fetal sex on placenta-associated circulating midpregnancy biomarkers. Biology of Sex Differences. ISSN 2042-6410. 13(1). doi: 10.1186/s13293-022-00443-1. Full text in Research Archive Show summary

  In utero exposure to nicotine, largely assessed by smoking, is a risk factor for impaired offspring health, while potential effects of non-combustible nicotine use such as snus (oral moist tobacco), are less well-known. Maternal serum concentrations of placental growth factor (PlGF) and soluble fms-like tyrosine kinase-1 (sFlt-1) may be viewed as ¡°placenta health markers¡±, known to differ by fetal sex. Maternal smoking during pregnancy has been associated with lower levels of circulating sFlt-1, while the effect of snus on placenta-associated angiogenic factors is unknown. Our aim was to explore if snus and/or smoking exposure was associated with midpregnancy maternal levels of sFlt-1, PlGF and sFlt-1/PlGF ratio if these associations were modified by fetal sex. Methods Midpregnancy (16¨C22 gestational weeks) serum from 2603 Scandinavian women enrolled in the population-based multi-center PreventADALL (Preventing Atopic Dermatitis and ALLergies in children) study was analysed for sFlt-1 and PlGF concentrations by electrochemiluminescence, deriving the sFlt-1/PGF ratio. Nicotine use was assessed by electronic questionnaires at enrollment in 2278 of the women. Univariable and multivariable linear regression models on log transformed outcomes were used to assess the association between nicotine use and biomarker levels. Interaction terms were included to identify whether the associations were modified by fetal sex. Results Median sFlt-1, PlGF and sFlt-1/PlGF ratios among women with nicotine exposure information were similar to those of all included women and differed by fetal sex. Current snus use was significantly associated with reduced maternal circulating PlGF levels in adjusted analyses [¦Â???0.12, (95% CI???0.20; 0.00) compared to never use, p?=?0.020]. A significant interaction between fetal sex and snus exposure was observed for PIGF (p?=?0.031). Prior or periconceptional snus use was significantly associated with PIGF in male fetus pregnancies [¦Â???0.05 (95% CI???0.09 to (??0.02)) and ¦Â???0.07 (95% CI???0.12 to (??0.02)) compared to never use, p?=?0.002]. Smoking was not significantly associated with any circulating biomarkers levels. Conclusions Midpregnancy maternal angiogenic profile differed by periconceptional snus use and fetal sex. Snus exposure, perceived as ¡°safe¡± by users, before or during pregnancy seems to affect midpregnancy placental health in a sex dimorphic manner.

• Rognes, Ingrid Nygren; Pischke, S?ren Erik; Ottestad, William; R?islien, Jo; Berg, Jens Petter & Johnson, Christina [Show all 8 contributors for this article] (2021). Increased complement activation 3 to 6 h after trauma is a predictor of prolonged mechanical ventilation and multiple organ dysfunction syndrome: a prospective observational study. Molecular medicine (Cambridge, Mass. Print). ISSN 1076-1551. 27, p. 1¨C13. doi: 10.1186/s10020-021-00286-3. Full text in Research Archive
• Johannessen, Karl Arne; Wear, Nina Kristin Steen; Toska, Karin; Hansb?, Morten; Berg, Jens Petter & Fosse, Erik (2021). Pathologic Blood Samples Tolerate Exposure to Vibration and High Turbulence in Simulated Drone Flights, but Plasma Samples Should be Centrifuged after Flight. IEEE Journal of Translational Engineering in Health and Medicine. ISSN 2168-2372. 9. doi: 10.1109/JTEHM.2021.3053172. Full text in Research Archive Show summary

  Objective. Most of the previous studies of drone transport of blood samples examined normal blood samples transported under tranquil air conditions. We studied the effects of 1- and 2-hour drone flights using random vibration and turbulence simulation (10-30 g-force) on blood samples from 16 healthy volunteers and 74 patients with varying diseased. Methods: Thirty-two of the most common analytes were tested. For biochemical analytes, we used plasma collected in lithium heparin tubes with and without separator gel. Gel samples were analyzed for the effect of separation by centrifugation before or after turbulence. Turbulence was simulated in an LDS V8900 high-force shaker using random vibration (range, 5¨C200 Hz), with samples randomly allocated to 1- or 2-hour flights with 25 or 50 episodes of turbulence from 10 to 30 G. Results: For all hematologic and most biochemical analytes, test results before and after turbulence exposure were similar (bias < 12%, intercepts < 10%). However, aspartate aminotransferase, folate, lactate dehydrogenase and lipid index increased significantly in samples separated by gel and centrifugation prior to vibration and turbulence test. These changes increased form 10 G to 30 G, but were not observed when the samples were separated after vibration and turbulence. Conclusions: Whole blood showed little vulnerability to turbulence, whereas plasma samples separated from blood cells by gel may be significantly influenced by turbulence when separated by spinning before the exposure. Centrifugation of plasma samples collected in tubes with separator gel should be avoided before drone flights that could be subject to turbulence.

• Wendel, Kristina; Pfeiffer, Helle Cecilie; Fugelseth, Drude; Nestaas, Eirik; Domell?f, Magnus & Sk?lhegg, Bj?rn Steen [Show all 42 contributors for this article] (2021). Effects of nutrition therapy on growth, inflammation and metabolism in immature infants: a study protocol of a double-blind randomized controlled trial (ImNuT). BMC Pediatrics. ISSN 1471-2431. 21. doi: 10.1186/s12887-020-02425-x. Full text in Research Archive Show summary

  Background: Current nutritional management of infants born very preterm results in significant deficiency of the essential fatty acids (FAs) arachidonic acid (ARA) and docosahexaenoic acid (DHA). The impact of this deficit on brain maturation and inflammation mediated neonatal morbidities are unknown. The aim of this study is to determine whether early supply of ARA and DHA improves brain maturation and neonatal outcomes in infants born before 29 weeks of gestation. Methods: Infants born at Oslo University Hospital are eligible to participate in this double-blind randomized controlled trial. Study participants are randomized to receive an enteral FA supplement of either 0.4 ml/kg MCT-oil? (medium chain triglycerides) or 0.4 ml/kg Formulaid? (100 mg/kg of ARA and 50 mg/kg of DHA). The FA supplement is given from the second day of life to 36 weeks' postmenstrual age (PMA). The primary outcome is brain maturation assessed by Magnetic Resonance Imaging (MRI) at term equivalent age. Secondary outcomes include quality of growth, incidence of neonatal morbidities, cardiovascular health and neuro-development. Target sample size is 120 infants (60 per group), this will provide 80% power to detect a 0.04 difference in mean diffusivity (MD, mm2/sec) in major white matter tracts on MRI. Discussion: Supplementation of ARA and DHA has the potential to improve brain maturation and reduce inflammation related diseases. This study is expected to provide valuable information for future nutritional guidelines for preterm infants. Trial registration: Clinicaltrials.gov ID: NCT03555019 . Registered 4 October 2018- Retrospectively registered.

• Brusletto, Berit Sletbakk; L?berg, Else Marit; Hellerud, Bernt C; Goverud, Ingeborg L?stegaard; Berg, Jens Petter & Olstad, Ole Kristoffer [Show all 9 contributors for this article] (2020). Extensive changes in transcriptomic ¡°fingerprints¡± and immunological cells in the large organs of patients dying of acute septic shock and multiple organ failure caused by Neisseria meningitidis. Frontiers in Cellular and Infection Microbiology. ISSN 2235-2988. 10:42, p. 1¨C30. doi: 10.3389/fcimb.2020.00042. Full text in Research Archive
• Bornstedt, Mette Eskild; Gjerlaugsen, Nina; Olstad, Ole Kristoffer; Berg, Jens Petter; Bredahl, May K. Lyamouri & Thorsby, Per Medb?e (2020). Vitamin D metabolites influence expression of genes concerning cellular viability and function in insulin producing ¦Â-cells (INS1E). Gene. ISSN 0378-1119. 746:144649, p. 1¨C8. doi: 10.1016/j.gene.2020.144649. Full text in Research Archive Show summary

  Background Studies have shown that vitamin D can enhance glucose-stimulated insulin secretion (GSIS) and change the expression of genes in pancreatic ¦Â-cells. Still the mechanisms linking vitamin D and GSIS are unknown. Material and methods We used an established ¦Â-cell line, INS1E. INS1E cells were pre-treated with 10 nM 1,25(OH)2vitamin D or 10 nM 25(OH)vitamin D for 72 h and stimulated with 22 mM glucose for 60 min. RNA was extracted for gene expression analysis. Results Expression of genes affecting viability, apoptosis and GSIS changed after pre-treatment with both 1,25(OH)2vitamin D and 25(OH)vitamin D in INS1E cells. Stimulation with glucose after pre-treatment of INS1E cells with 1,25(OH)2vitamin D resulted in 181 differentially expressed genes, whereas 526 genes were differentially expressed after pre-treatment with 25(OH)vitamin D. Conclusion Vitamin D metabolites may affect pancreatic ¦Â-cells and GSIS through changed gene expression for genes involved in ¦Â-cell function and viability.

• Mitlid-Mork, Birgitte; Bowe, Sophie; Gran, Jon Michael; Bolstad, Nils; Berg, Jens Petter & Redman, Christopher W.G. [Show all 8 contributors for this article] (2020). Maternal placental growth factor and soluble fms-like tyrosine kinase-1 reference ranges in post-term pregnancies: A prospective observational study. PLOS ONE. ISSN 1932-6203. 15:e0240473(10), p. 1¨C14. doi: 10.1371/journal.pone.0240473. Full text in Research Archive
• Eieland, Alexander K.; Normann, Kjersti R.; Sundaram, Arvind Y. M.; Nyman, Tuula A.; ?ystese, Kristin A. B. & Lekva, Tove [Show all 9 contributors for this article] (2020). Distinct pattern of endoplasmic reticulum protein processing and extracellular matrix proteins in functioning and silent corticotroph pituitary adenomas. Cancers. ISSN 2072-6694. 12(10), p. 1¨C20. doi: 10.3390/cancers12102980. Full text in Research Archive
• Atukunda, Prudence; Muhoozi, Grace Kyamazima Mehangye; Diep, Lien My; Berg, Jens Petter; Westerberg, Ane Cecilie & Iversen, Per Ole (2020). The association of urine markers of iodine intake with development and growth among children in rural Uganda: A secondary analysis of a randomised education trial. Public Health Nutrition (PHN). ISSN 1368-9800. p. 1¨C10. doi: 10.1017/S1368980020001603. Full text in Research Archive
• Jansen, Aina; Berg, Jens Petter; Klungs?yr, Ole; M¨¹ller, Mette Helen Bj?rge; Lyche, Jan Ludvig & Aaseth, Jan (2019). The Influence of Persistent Organic Pollutants on Thyroidal, Reproductive and Adrenal Hormones After Bariatric Surgery. Obesity Surgery. ISSN 0960-8923. doi: 10.1007/s11695-019-04273-w. Show summary

  Persistent organic pollutants (POPs) including organochlorine pesticides, polychlorinated biphenyls (PCBs), and per- and polyfluoroalkylated substances (PFASs) are suspected endocrine disruptors. AIM: To evaluate the associations between POPs and thyroidal, reproductive, and adrenal hormones in a study population treated with bariatric surgery. METHODS: Blood samples from a cohort of 63 participants before and 1 year after bariatric surgery were analyzed for 16 lipophilic POPs, 17 PFASs, and thyroidal, reproductive, and adrenal hormones. Participants reporting relevant medical conditions or interfering medication were excluded, and plausible confounders were corrected for in multiple regression analyses. RESULTS: Free thyroxine (fT4) showed a significant decrease from preoperative to postoperative follow-up, and regression analyses demonstrated that p,p'-dichlorodiphenyldichloroethylene (p,p-DDE) was inversely associated with the ratio free triiodothyronine/free thyroxine (fT3/fT4). Testosterone concentrations in male participants increased significantly in the study period, and sex hormone-binding globulin (SHBG) increased in both gender. Regression analyses showed positive associations between increased levels of lipophilic POPs and the raised postoperative testosterone and SHBG concentrations in males. For females, an inverse association between the sum perfluoroalkyl carboxylic acids (¦²PFCA) and SHBG was seen. Regression analyses of postoperative serum cortisol concentrations on changes in hexachlorobenzene (HCB) showed a non-significant inverse association. CONCLUSION: The results suggest that POPs may have an influence on the hypothalamic-pituitary-thyroid (HPT) and the hypothalamic-pituitary-gonadal (HPG) axes after bariatric surgery. Because of small sample sizes and discrepancy in the sampling time points pre- and postoperatively, the observed hormonal impacts of POPs must be interpreted as associative and not causative. Further studies are needed to confirm the findings.

• N?ss-Andresen, Marthe-Lise; Eggemoen, ?se Ruth; Berg, Jens Petter; Falk, Ragnhild S?rum & Jenum, Anne Karen (2019). Serum ferritin, soluble transferrin receptor, and total body iron for the detection of iron deficiency in early pregnancy: A multiethnic population-based study with low use of iron supplements. American Journal of Clinical Nutrition. ISSN 0002-9165. 109(3), p. 566¨C575. doi: 10.1093/ajcn/nqy366. Full text in Research Archive
• Beitland, Sigrid; Nakstad, Espen Rostrup; Berg, Jens Petter; Siebke, Anne-Marie; Brusletto, Berit Sletbakk & Brunborg, Cathrine [Show all 8 contributors for this article] (2019). Urine ¦Â-2-Microglobulin, Osteopontin, and Trefoil Factor 3 May Early Predict Acute Kidney Injury and Outcome after Cardiac Arrest. Critical Care Research and Practice. ISSN 2090-1305. 2019. doi: 10.1155/2019/4384796. Full text in Research Archive
• Hassel, Bj?rnar; Mariussen, Espen; Idland, Ane-Victoria; Dahl, Gry Tors?ter; R?der, Johan & Frihagen, Frede Jon [Show all 9 contributors for this article] (2018). CSF sodium at toxic levels precedes delirium in hip fracture patients. Neurotoxicology. ISSN 0161-813X. 69(December), p. 11¨C16. doi: 10.1016/j.neuro.2018.08.010.
• ?ystese, Kristin Astrid Berland; Berg, Jens Petter; Normann, Kjersti Ringvoll; Zucknick, Manuela; Casar-Borota, Olivera & Bollerslev, Jens (2018). The role of E and N-cadherin in the postoperative course of gonadotroph pituitary tumours. Endocrine. ISSN 1355-008X. 62(2), p. 351¨C360. doi: 10.1007/s12020-018-1679-0.
• Aass, Hans Christian Dalsbotten; Hellum, Marit Synn?ve; Siebke, Anne-Marie; Brandtz?g, Petter; Berg, Jens Petter & ?vsteb?, Reidun [Show all 7 contributors for this article] (2018). Whole-blood incubation with the Neisseria meningitidis lpxL1 mutant induces less pro-inflammatory cytokines than the wild type, and IL-10 reduces the MyD88-dependent cytokines. Innate Immunity. ISSN 1753-4259. 24(2), p. 101¨C111. doi: 10.1177/1753425917749299. Full text in Research Archive
• Gopinathan, Unni; Redalen, Kathrine; Siebke, Anne-Marie; Kierulf, Peter; Brandtz?g, Petter & Ree, Anne Hansen [Show all 8 contributors for this article] (2018). Large-scale reduction of tyrosine kinase activities in human monocytes stimulated in vitro with N. meningitidis. PLOS ONE. ISSN 1932-6203. 13(1). doi: 10.1371/journal.pone.0181912. Full text in Research Archive
• Pasovic, Lara; Utheim, Tor Paaske; Reppe, Sjur; Khan, Ayyad Ahmad Zartasht; Jackson, Catherine & Thiede, Bernd [Show all 8 contributors for this article] (2018). Improvement of storage medium for cultured human retinal pigment epithelial cells using factorial design. Scientific Reports. ISSN 2045-2322. 8(1). doi: 10.1038/s41598-018-24121-8. Full text in Research Archive
• Vistnes, Maria; Tapia, German; M?rild, Karl Staffan; Midttun, ?ivind; Ueland, Per Magne & Viken, Marte K [Show all 14 contributors for this article] (2017). Plasma immunological markers in pregnancy and cord blood: A possible link between macrophage chemo-attractants and risk of childhood type 1 diabetes. American journal of reproductive immunology. ISSN 1046-7408. 79(3). doi: 10.1111/aji.12802.
• ?ystese, Kristin Astrid Berland; Casar-Borota, Olivera; Normann, Kjersti Ringvoll; Zucknick, Manuela; Berg, Jens Petter & Bollerslev, Jens (2017). Estrogen Receptor ¦Á, a Sex-Dependent Predictor of Aggressiveness in Nonfunctioning Pituitary Adenomas: SSTR and Sex Hormone Receptor Distribution in NFPA. Journal of Clinical Endocrinology and Metabolism (JCEM). ISSN 0021-972X. 102(9), p. 3581¨C3590. doi: 10.1210/jc.2017-00792.
• Klingenberg, Olav; Furuset, Torill; Hestbr?ten, Camilla R?ising; Hallberg, Marit Hansen; Steiro, Astrid & Orset, Iren R?stbakken [Show all 7 contributors for this article] (2017). HbA1c analysis by capillary electrophoresis?comparison with chromatography and an immunological method. Scandinavian Journal of Clinical and Laboratory Investigation. ISSN 0036-5513. 77(6), p. 458¨C464. doi: 10.1080/00365513.2017.1338747. Full text in Research Archive
• Gopinathan, Unni; ?vsteb?, Reidun; Brusletto, Berit Sletbakk; Olstad, Ole Kristoffer; Kierulf, Peter & Brandtz?g, Petter [Show all 7 contributors for this article] (2017). Transcriptomic data from two primary cell models stimulating human monocytes suggest inhibition of oxidative phosphorylation and mitochondrial function by N. meningitidis which is partially up-regulated by IL-10. BMC Immunology. ISSN 1471-2172. 18:46, p. 1¨C17. doi: 10.1186/s12865-017-0229-5.
• Brusletto, Berit Sletbakk; Hellerud, Bernt C; L?berg, Else Marit; Goverud, Ingeborg L?stegaard; Vege, ?shild & Berg, Jens Petter [Show all 8 contributors for this article] (2017). Traceability and distribution of Neisseria meningitidis DNA in archived post mortem tissue samples from patients with systemic meningococcal disease. BMC Clinical Pathology. ISSN 1472-6890. 17(1). doi: 10.1186/s12907-017-0049-9.
• Hellum, Marit Synn?ve; Siebke, Anne-Marie; Berg, Jens Petter; Brandtz?g, Petter; ?vsteb?, Reidun & Henriksson, Carola (2017). The Neisseria meningitidis lpxL1 mutant induces less tissue factor expression and activity in primary human monocytes and monocyte-derived microvesicles than the wild type meningococcus. Innate Immunity. ISSN 1753-4259. 23(2), p. 196¨C205. doi: 10.1177/1753425916684201.
• Waage, Christin; Jenum, Anne Karen; Mdala, Ibrahimu; Berg, Jens Petter; Richardsen, K?re R?nn & Birkeland, K?re I. (2017). Associations between gestational diabetes mellitus and elevated HbA1c early postpartum in a multi-ethnic population. Primary Care Diabetes. ISSN 1751-9918. 11(2), p. 132¨C139. doi: 10.1016/j.pcd.2016.09.007.
• J?rgenrud, Benedicte Marie; Stene, Lars Christian; Tapia, German; B??s, H?kon; Pepaj, Milaim & Berg, Jens Petter [Show all 10 contributors for this article] (2017). Longitudinal plasma metabolic profiles, infant feeding, and islet autoimmunity in the MIDIA study. Pediatric Diabetes. ISSN 1399-543X. 18, p. 111¨C119. doi: 10.1111/pedi.12360. Show summary

  Aims The aim of this study was to investigate the longitudinal plasma metabolic profiles in healthy infants and the potential association with breastfeeding duration and islet autoantibodies predictive of type 1 diabetes. Method Up to four longitudinal plasma samples from age 3 months from case children who developed islet autoimmunity (n?=?29) and autoantibody-negative control children (n?=?29) with the HLA DR4-DQ8/DR3-DQ2 genotype were analyzed using two-dimensional gas chromatography coupled to a time-of-flight mass spectrometer for detection of small polar metabolites. Results Plasma metabolite levels were found to depend strongly on age, with fold changes varying up to 50% from age 3 to 24 months (p?<?0.001 after correction for multiple testing). Tyrosine levels tended to be lower in case children, but this was not significant after correction for multiple testing. Ornithine levels were lower in case children compared with the controls at the time of seroconversion, but the difference was not statistically significant after correcting for multiple testing. Breastfeeding for at least 3?months as compared with shorter duration was associated with higher plasma levels of isoleucine, and lower levels of methionine and 3,4-dihydroxybutyric acid at 3 months of age. Conclusions Plasma levels of several small, polar metabolites changed with age during early childhood, independent of later islet autoimmunity status and sex. Breastfeeding was associated with higher levels of branched-chain amino acids, and lower levels of methionine and 3,4-dihydroxybutyric acid.

• Beitland, Sigrid; Waldum-Grevbo, B?rd Endre; Nakstad, Espen Rostrup; Berg, Jens Petter; Siebke, Anne-Marie & Brusletto, Berit Sletbakk [Show all 9 contributors for this article] (2016). Urine biomarkers give early prediction of acute kidney injury and outcome after outof- hospital cardiac arrest. Critical Care. ISSN 1364-8535. 20(1). doi: 10.1186/s13054-016-1503-2.
• Sachse, Daniel; Solev?g, Anne Lee; Berg, Jens Petter & Nakstad, Britt (2016). The role of plasma and urine metabolomics in identifying new biomarkers in severe newborn asphyxia: A study of asphyxiated newborn pigs following cardiopulmonary resuscitation. PLOS ONE. ISSN 1932-6203. 11:e0161123(8). doi: 10.1371/journal.pone.0161123. Full text in Research Archive
• Normann, Kjersti Ringvoll; ?ystese, Kristin Astrid Berland; Berg, Jens Petter; Lekva, Tove; Berg-Johnsen, Jon & Bollerslev, Jens [Show all 7 contributors for this article] (2016). Selection and validation of reliable reference genes for RT-qPCR analysis in a large cohort of pituitary adenomas. Molecular and Cellular Endocrinology. ISSN 0303-7207. 437, p. 183¨C189. doi: 10.1016/j.mce.2016.08.030.
• Kristensen, Gunn Berit Berge; Rustad, P?l; Berg, Jens Petter & Aakre, Kristin (2016). Analytical bias exceeding desirable quality goal in 4 out of 5 common immunoassays: Results of a native single serum sample external quality assessment program for cobalamin, folate, ferritin, thyroid-stimulating hormone, and free t4 analyses. Clinical Chemistry. ISSN 0009-9147. 62(9), p. 1255¨C1263. doi: 10.1373/clinchem.2016.258962.
• Hov, Karen Roksund; Berg, Jens Petter; Frihagen, Frede Jon; R?der, Johan; Hall, Roanna J. & Wyller, Torgeir Bruun [Show all 7 contributors for this article] (2016). Blood-cerebrospinal fluid barrier integrity in delirium determined by Q-Albumin. Dementia and Geriatric Cognitive Disorders. ISSN 1420-8008. 41(3-4), p. 192¨C198. doi: 10.1159/000443789.
• Kringen, Marianne K.; Stormo, Camilla; Berg, Jens Petter; Terry, Sharon F.; Vocke, Christine M. & Rizvi, Samar [Show all 8 contributors for this article] (2015). Copy number variation in the ATP-binding cassette transporter ABCC6 gene and ABCC6 pseudogenes in patients with pseudoxanthoma elasticum. Molecular Genetics & Genomic Medicine. ISSN 2324-9269. 3(3), p. 233¨C237. doi: 10.1002/mgg3.137. Show summary

  Single mutations in the ATP-binding cassette transporter (ABCC6) gene (OMIM 603234) are known to cause the rare autosomal recessive disease pseudoxanthoma elasticum (PXE). Recently, we have found that copy number variations (CNVs) in pseudogenes of the ABCC6 gene are quite common. The aim of this study was to investigate the frequency and possible contribution of CNV in ABCC6 and its pseudogenes in PXE. Genomic DNA from 212 PXE individuals were examined for copy number by pyrosequencing and quantitative polymerase chain reaction (PCR) and compared with healthy individuals. The frequency of PXE individuals with any CNV was higher than in healthy individuals. The majority of variation comprised known and possibly new deletions in the ABCC6 gene and duplications of the ABCC6P1 and ABCC6P2 genes. ABCC6 deletions and ABCC6P2 duplications were not observed in 142 healthy individuals. In conclusion, by pyrosequencing and quantitative PCR, we were able to detect known and possibly new deletions in the ABCC6 gene that may have caused the PXE phenotype. Pyrosequencing may be used in PXE patients who have obtained incomplete genotype from conventional techniques. The frequency of ABCC6P2 pseudogene duplication was more common in PXE patients than healthy individuals and may affect the PXE phenotype.

• Lekva, Tove; Berg, Jens Petter; Lyle, Robert; Heck, Ansgar; Bollerslev, Jens & Ueland, Thor (2015). Alternative splicing of placental lactogen (CSH2) in somatotroph pituitary adenomas. Neuro - endocrinology letters. ISSN 0172-780X. 36(2), p. 136¨C142. Show summary

  OBJECTIVES: Somatotroph adenomas secrete supraphysiological amounts of GH, causing acromegaly. We have previously shown epithelial splicing regulator 1 (ESRP1) to play a role in epithelial mesenchymal transition (EMT) progression in these adenomas and account for poor treatment response. We evaluated if the mRNA levels of the GH/CSH gene cluster in somatotroph adenomas are associated with an epithelial phenotype and response to SA treatment. METHODS: We investigated the associations between ESRP1 and the growth hormone/chorionic somatomammotropin (GH/CSH) gene cluster by RNA sequencing (RNAseq). CSH2 isoform 3 mRNA was further evaluated in 65 somatotroph adenomas and associations with disease severity and treatment response. RESULTS: mRNA for all genes in the GH/CSH cluster were expressed, however, only chorionic somatomammotropin 2/placental lactogen 2 (CSH2) displayed an alternative splicing pattern. CSH2 isoform 3 was associated with a dense granulation pattern and an epithelial phenotype with high levels of ESRP1 and E-cadherin expression. Further, CSH2 isoform 3 was associated with reduced serum GH and IGF-I levels after somatostatin analog treatment. CONCLUSIONS: Attenuated CSH2 isoform 3 was associated with mesenchymal phenotype and a blunted clinical response to somatostatin analog treatment in patients with acromegaly.

• Gopinathan, Unni; Brusletto, Berit Sletbakk; Olstad, Ole Kristoffer; Kierulf, Peter; Berg, Jens Petter & Brandtz?g, Petter [Show all 7 contributors for this article] (2015). IL-10 immunodepletion from meningococcal sepsis plasma induces extensive changes in gene expression and cytokine release in stimulated human monocytes. Innate Immunity. ISSN 1753-4259. 21(4), p. 429¨C449. doi: 10.1177/1753425914547743.
• Reppe, Sjur; Noer, Agate; Grimholt, Runa Marie; Halldorsson, Bjarni V; Medina-Gomez, Carolina & Gautvik, Vigdis Teig [Show all 16 contributors for this article] (2015). Methylation of bone SOST, its mRNA, and serum sclerostin levels correlate strongly with fracture risk in postmenopausal women. Journal of Bone and Mineral Research. ISSN 0884-0431. 30(2), p. 249¨C256. doi: 10.1002/jbmr.2342.
• Landr?, Nils Inge; Jonassen, Rune; Clark, Luke; Foss, Kari Bente; Aker, Martin & B?, Ragnhild [Show all 9 contributors for this article] (2015). Serotonin transporter polymorphisms predict response inhibition in healthy volunteers. Neuroscience Letters. ISSN 0304-3940. 584, p. 109¨C112. doi: 10.1016/j.neulet.2014.10.006.
• Stormo, Camilla; Kristiansen, Marianne; Lyle, Robert; Olstad, Ole Kristoffer; Sachse, Daniel & Berg, Jens Petter [Show all 7 contributors for this article] (2014). RNA-sequencing analysis of HepG2 cells treated with atorvastatin. PLOS ONE. ISSN 1932-6203. 9:e0105836(8). doi: 10.1371/journal.pone.0105836. Full text in Research Archive
• Steen, Nils Eiel; Methlie, Paal; Lorentzen, Steinar; Dieset, Ingrid; Aas, Monica & Nerhus, Mari [Show all 11 contributors for this article] (2014). Altered systemic cortisol metabolism in bipolar disorder and schizophrenia spectrum disorders. Journal of Psychiatric Research. ISSN 0022-3956. 52(1), p. 57¨C62. doi: 10.1016/j.jpsychires.2014.01.017.
• Sachse, Daniel; B?rug, Anne Bergljot; Sletner, Line; Birkeland, K?re I.; Nakstad, Britt & Jenum, Anne Karen [Show all 7 contributors for this article] (2014). Urine NMR metabolomics analysis of breastfeeding biomarkers during and after pregnancy in a large prospective cohort study. Scandinavian Journal of Clinical and Laboratory Investigation. ISSN 0036-5513. 74(3), p. 264¨C272. doi: 10.3109/00365513.2014.884240.
• Moltu, Sissel; Sachse, Daniel; Blakstad, Elin Wahl; Str?mmen, Kenneth; Nakstad, Britt & Almaas, Astrid [Show all 14 contributors for this article] (2014). Urinary metabolite profiles in premature infants show early postnatal metabolic adaption and maturation. Nutrients. ISSN 2072-6643. 6(5), p. 1913¨C1930. doi: 10.3390/nu6051913.
• Vik?ren, Thea Berge; Berg, Jens Petter & Berg, Tore Julsrud (2014). Feilkilder ved bruk av hemoglobin A1C. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 134(4), p. 417¨C421. doi: 10.4045/tidsskr.13.0938.
• Hellum, Marit Synn?ve; ?vsteb?, Reidun; Brusletto, Berit Sletbakk; Berg, Jens Petter; Brandtz?g, Petter & Henriksson, Carola (2014). Microparticle-associated tissue factor activity correlates with plasma levels of bacterial lipopolysaccharides in meningocoocal septic shock. Thrombosis Research. ISSN 0049-3848. 133(3), p. 507¨C514. doi: 10.1016/j.thromres.2013.12.031.
• Reppe, Sjur; Sachse, Daniel; Olstad, Ole Kristoffer; Gautvik, Vigdis Teig; Sanderson, Paul & Datta, Harish K [Show all 8 contributors for this article] (2013). Identification of transcriptional macromolecular associations in human bone using browser based in silico analysis in a giant correlation matrix. Bone. ISSN 8756-3282. 53(1), p. 69¨C78. doi: 10.1016/j.bone.2012.11.015.
• Moltu, Sissel; Str?mmen, Kenneth; Blakstad, Elin Wahl; Almaas, Astrid; Westerberg, Ane Cecilie & Br?kke, Kristin [Show all 13 contributors for this article] (2013). Enhanced feeding in very-low-birth-weight infants may cause electrolyte disturbances and septicemia - A randomized, controlled trial. Clinical Nutrition. ISSN 0261-5614. 32(2), p. 207¨C212. doi: 10.1016/j.clnu.2012.09.004.
• Berg, Jens Petter (2013). Hba1c as a diagnostic tool in diabetes mellitus. Norsk Epidemiologi. ISSN 0803-2491. 23(1), p. 5¨C8. doi: 10.5324/nje.v23i1.1596.
• Lekva, Tove; Berg, Jens Petter; Heck, Ansgar; Fougner, Stine Lyngvi; Olstad, Ole Kristoffer & Ringstad, Geir Andre [Show all 8 contributors for this article] (2013). Attenuated RORC expression in the presence of EMT progression in somatotroph adenomas following treatment with somatostatin analogs is associated with poor clinical recovery. PLOS ONE. ISSN 1932-6203. 8(6). doi: 10.1371/journal.pone.0066927.
• Lekva, Tove; Berg, Jens Petter; Lyle, Robert; Heck, Ansgar; Ringstad, Geir Andre & Olstad, Ole Kristoffer [Show all 10 contributors for this article] (2013). Epithelial Splicing Regulator Protein 1 and Alternative Splicing in Somatotroph Adenomas. Endocrinology. ISSN 0013-7227. 154(9), p. 3331¨C3343. doi: 10.1210/en.2013-1051.
• Evang, Johan Arild; Bollerslev, Jens; Casar-Borota, Olivera; Lekva, Tove; Ramm-Pettersen, Jon-Terje & Berg, Jens Petter (2013). Different levels of various glucocorticoid-regulated genes in corticotroph adenomas. Endocrine. ISSN 1355-008X. 44(1), p. 220¨C227. doi: 10.1007/s12020-012-9871-0.
• Sakhi, Amrit Kaur; Berg, Jens Petter & Berg, Tore Julsrud (2013). Glyoxalase 1 enzyme activity in erythrocytes and Ala111Glu polymorphism in type 1-diabetes patients. Scandinavian Journal of Clinical and Laboratory Investigation. ISSN 0036-5513. 73(2), p. 175¨C181. doi: 10.3109/00365513.2013.765028.
• Sachse, Daniel; Sletner, Line; M?rkrid, Kjersti; Jenum, Anne Karen; Birkeland, K?re I. & Rise, Frode [Show all 8 contributors for this article] (2012). Metabolic Changes in Urine during and after Pregnancy in a Large, Multiethnic Population-Based Cohort Study of Gestational Diabetes. PLOS ONE. ISSN 1932-6203. 7(12). doi: 10.1371/journal.pone.0052399. Full text in Research Archive Show summary

  This study aims to identify novel markers for gestational diabetes (GDM) in the biochemical profile of maternal urine using NMR metabolomics. It also catalogs the general effects of pregnancy and delivery on the urine profile. Urine samples were collected at three time points (visit V1: gestational week 8¨C20; V2: week 28¡À2; V3:10¨C16 weeks post partum) from participants in the STORK Groruddalen program, a prospective, multiethnic cohort study of 823 healthy, pregnant women in Oslo, Norway, and analyzed using 1H-NMR spectroscopy. Metabolites were identified and quantified where possible. PCA, PLS-DA and univariate statistics were applied and found substantial differences between the time points, dominated by a steady increase of urinary lactose concentrations, and an increase during pregnancy and subsequent dramatic reduction of several unidentified NMR signals between 0.5 and 1.1 ppm. Multivariate methods could not reliably identify GDM cases based on the WHO or graded criteria based on IADPSG definitions, indicating that the pattern of urinary metabolites above micromolar concentrations is not influenced strongly and consistently enough by the disease. However, univariate analysis suggests elevated mean citrate concentrations with increasing hyperglycemia. Multivariate classification with respect to ethnic background produced weak but statistically significant models. These results suggest that although NMR-based metabolomics can monitor changes in the urinary excretion profile of pregnant women, it may not be a prudent choice for the study of GDM.

• Gopinathan, Unni; ?vsteb?, Reidun; Olstad, Ole Kristoffer; Brusletto, Berit Sletbakk; Aass, Hans Christian & Kierulf, Peter [Show all 8 contributors for this article] (2012). Global Effect of Interleukin-10 on the Transcriptional Profile Induced by Neisseria meningitidis in Human Monocytes. Infection and Immunity. ISSN 0019-9567. 80(11), p. 4046¨C4054. doi: 10.1128/IAI.00386-12.
• Hellum, Marit Synn?ve; ?vsteb?, Reidun; Siebke, Anne-Marie; Berg, Jens Petter; Brandtz?g, Petter & Henriksson, Carola (2012). Microparticle-associated tissue factor activity measured with the Zymuphen MP-TF kit and the calibrated automated thrombogram assay. Blood Coagulation and Fibrinolysis. ISSN 0957-5235. 23(6), p. 520¨C526. doi: 10.1097/MBC.0b013e328354a256.
• ?vsteb?, Reidun; Aass, Hans Christian; Foss, Kari Bente; Siebke, Anne-Marie; Gopinathan, Unni & Kierulf, Peter [Show all 9 contributors for this article] (2012). LPS from Neisseria meningitidis is crucial for inducing monocyte- and microparticle-associated tissue factor activity but not for tissue factor expression. Innate Immunity. ISSN 1753-4259. 18(4), p. 580¨C591. doi: 10.1177/1753425911428230.
• Lekva, Tove; Berg, Jens Petter; Fougner, Stine Lyngvi; Olstad, Ole Kristoffer; Ueland, Thor & Bollerslev, Jens (2012). Gene Expression Profiling Identifies ESRP1 as a Potential Regulator of Epithelial Mesenchymal Transition in Somatotroph Adenomas from a Large Cohort of Patients with Acromegaly. Journal of Clinical Endocrinology and Metabolism (JCEM). ISSN 0021-972X. 97(8), p. E1506¨CE1514. doi: 10.1210/jc.2012-1760.
• Jorde, Rolf; Schirmer, Henrik; Wilsgaard, Tom; Joakimsen, Ragnar Martin; Mathiesen, Ellisiv B. & Nj?lstad, Inger [Show all 11 contributors for this article] (2012). Polymorphisms Related to the Serum 25-Hydroxyvitamin D Level and Risk of Myocardial Infarction, Diabetes, Cancer and Mortality. The Troms? Study. PLOS ONE. ISSN 1932-6203. 7(5). doi: 10.1371/journal.pone.0037295. Full text in Research Archive
• Fougner, Stine Lyngvi; Borota, Olivera Casar; Heck, Ansgar; Berg, Jens Petter & Bollerslev, Jens (2012). Adenoma granulation pattern correlates with clinical variables and effect of somatostatin analogue treatment in a large series of patients with acromegaly. Clinical Endocrinology. ISSN 0300-0664. 76(1), p. 96¨C102. doi: 10.1111/j.1365-2265.2011.04163.x.
• Jonassen, Rune; Endestad, Tor; Neumeister, Alexander; Foss, Kari Bente; Berg, Jens Petter & Landr?, Nils Inge (2012). The effects of the serotonin transporter polymorphism and age on frontal white matter integrity in healthy adult women. Frontiers in Human Neuroscience. ISSN 1662-5161. 6. doi: 10.3389/fnhum.2012.00019.
• Jonassen, Rune; Endestad, Tor; Neumeister, Alexander; Haug, Kari Bente Foss; Berg, Jens Petter & Landr?, Nils Inge (2012). Serotonin Transporter Polymorphism Modulates N-Back Task Performance and fMRI BOLD Signal Intensity in Healthy Women. PLOS ONE. ISSN 1932-6203. 7(1). doi: 10.1371/journal.pone.0030564.
• Kristiansen, Marianne; Stormo, Camilla; Grimholt, Runa Marie; Berg, Jens Petter & Piehler, Armin (2012). Copy number variations of the ATP-binding cassette transporter ABCC6 gene and its pseudogenes. BMC Research Notes. ISSN 1756-0500. 5. doi: 10.1186/1756-0500-5-425.
• Stormo, Camilla; Kristiansen, Marianne; Grimholt, Runa Marie; Berg, Jens Petter & Piehler, Armin (2012). A novel 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGCR) splice variant with an alternative exon 1 potentially encoding an extended N-terminus. BMC Molecular Biology. ISSN 1471-2199. 13. doi: 10.1186/1471-2199-13-29.
• Berg, Jens Petter; Hanssen, Kristian Folkvord; Bjerve, Kristian S; Claudi, Tor; Dahl-J?rgensen, Knut & Rustad, P?l [Show all 8 contributors for this article] (2011). Standardisert hemoglobin A1C til diagnostisk bruk? Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 131(6), p. 565¨C6. doi: 10.4045/tidsskr.10.1160.
• Aass, Hans Christian D.; ?vsteb?, Reidun; Tr?seid, Anne-Marie S.; Kierulf, Peter; Berg, Jens Petter & Henriksson, Carola Elisabeth (2011). Fluorescent particles in the antibody solution result in false TF- and CD14-positive microparticles in flow cytometric analysis. Cytometry Part A. ISSN 1552-4922. 79A(12), p. 990¨C999. doi: 10.1002/cyto.a.21147.
• Steen, Nils Eiel; Methlie, Paal; Lorentzen, Steinar; Hope, Sigrun; Barrett, Elisabeth Ann & Larsson, Sara [Show all 13 contributors for this article] (2011). Increased systemic cortisol metabolism in patients with schizophrenia and bipolar disorder: a mechanism for increased stress vulnerability? Journal of Clinical Psychiatry. ISSN 0160-6689. 72(11), p. 1515¨C1521. doi: 10.4088/JCP.10m06068yel.
• Evang, Johan Arild; Berg, Jens Petter; Borota, Olivera Casar; Lekva, Tove; Kristiansen, Marianne & Ramm-Pettersen, Jon-Terje [Show all 7 contributors for this article] (2011). Reduced levels of E-cadherin correlate with progression of corticotroph pituitary tumours. Clinical Endocrinology. ISSN 0300-0664. 75(6), p. 811¨C818. doi: 10.1111/j.1365-2265.2011.04109.x.
• Lund, Terje; Svindland, Aud; Pepaj, Milaim; Jensen, Aase-Brith Ellefsen; Berg, Jens Petter & Kilhovd, Bente [Show all 7 contributors for this article] (2011). Fibrin(ogen) may be an important target for methylglyoxal-derived AGE modification in elastic arteries of humans. Diabetes & vascular disease research. ISSN 1479-1641. 8(4), p. 284¨C294. doi: 10.1177/1479164111416831.

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• Hagve, Tor-Arne & Berg, Jens Petter (2019). Klinisk biokjemi og fysiologi, 6. utgave. Gyldendal Akademisk. ISBN 978-82-05-52788-1. 464 p.
• Hagve, Tor-Arne & Berg, Jens Petter (2015). Klinisk biokjemi og fysiologi. Gyldendal Akademisk. ISBN 978-82-05-46367-7. 443 p.
• Hagve, Tor-Arne & Berg, Jens Petter (2011). Klinisk biokjemi og fysiologi. Gyldendal Norsk Forlag A/S. ISBN 978-82-05-39914-3. 448 p.

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• Storsul, Tanja; Berg, Jens Petter; Urdal, Henrik; Sivertsen, Gunnar & R?eggen, Vidar (2024). Fortsatt behov for forsker?involvering og kvalitets?orientering. Khrono.no. ISSN 1894-8995.
• Storsul, Tanja; Berg, Jens Petter; Urdal, Henrik; Sivertsen, Gunnar & R?eggen, Vidar (2023). Hvordan b?r framtidas indikator for publisering v?re? Khrono.no. ISSN 1894-8995.
• Mariampillai, Julian Eek; Halvorsen, Lene Vern?s; Larstorp, Anne Cecilie Kjeldsen; Heimark, Sondre; Waldum-Grevbo, B?rd & Kjeldsen, Sverre [Show all 10 contributors for this article] (2023). Diabetes og kronisk nyresykdom. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 143(12). doi: 10.4045/tidsskr.22.0822.
• Berg, Jens Petter & Gladhaug, Ivar Prydz (2020). Disputasen er en del av doktorgradsproven. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 140(9), p. 1¨C3. doi: 10.4045/tidsskr.20.0328.
• Berg, Jens Petter (2019). Utredning av sykdom i binyrene, Klinisk biokjemi og fysiologi, 6. utgave. Gyldendal Akademisk. ISSN 978-82-05-52788-1. p. 382¨C393.
• Berg, Jens Petter & Tazmini, Kiarash (2019). Utredning av sykdom i hypofysen, Klinisk biokjemi og fysiologi, 6. utgave. Gyldendal Akademisk. ISSN 978-82-05-52788-1. p. 370¨C381.
• Berg, Jens Petter & Gladhaug, Ivar Prydz (2019). Viktig at pr?veforelesningens hensikt blir oppfylt. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 139(16), p. 1534¨C1534. doi: 10.4045/tidsskr.19.0646.
• Beitland, Sigrid; Nakstad, Espen Rostrup; Berg, Jens Petter; Tr?seid, Anne-Marie Siebke; Brusletto, Berit Sletbakk & Brunborg, Cathrine [Show all 7 contributors for this article] (2018). Urine biomarkers may early predict acute kidney injury and outcome after out-of-hospital cardiac arrest. Intensive Care Medicine Experimental. ISSN 2197-425X. 6. doi: 10.1186/s40635-018-0201-6.
• Schwettmann, Lutz; Berg, Jens Petter & Sandberg, Sverre (2018). HbA1c skal angis i mmol/mol. Tidsskrift for Den norske legeforening (Tidsskriftet). ISSN 0029-2001. 138(15), p. 1404¨C1405. doi: 10.4045/tidsskr.18.0633.
• M?rild, Karl; Vistnes, Maria; Tapia, German; Midttun, ?ivind; Ueland, Per Magne & Viken, Marte K [Show all 10 contributors for this article] (2017). Midpregnancy and cord blood immunologic biomarkers, HLA genotype, and pediatric celiac disease. Journal of Allergy and Clinical Immunology. ISSN 0091-6749. 139(5), p. 1696¨C1698. doi: 10.1016/j.jaci.2016.10.016.
• Berg, Jens Petter & Halse, Johan (2015). Fenylketonuri. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter & ?ye, Ivar (2015). Dopingmidler. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter & ?ye, Ivar (2015). Dopingkontroll. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter & Opdahl, Helge (2015). Diabeteskoma. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter & Vaaler, Stein (2015). Diabetes. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter (2015). Aromatase. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter (2015). antinukle?re faktorer. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Berg, Jens Petter (2015). Androstenedion. In Godal, Anne Marit (Eds.), Store norske leksikon (snl.no 2015). Store norske leksikon AS.
• Vereshchagina, Elizaveta; Jensen, Geir Uri; Mielnik, Michal Marek; Berg, Jens Petter & ?vsteb?, Reidun (2015). A versatile fabrication and assembly approach for microfluidic capturing of extracellular vesicles . Show summary

  Cells communicate by means of "messengers" known as extracellular vesicles, i.e. small (30©\1000 nm) cell derived vesicles released from almost all eukaryotic cells into their extracellular environment and containing a variety of proteins and RNAs [1]. It has been foreseen that the next generation of biomarkers for disease diagnostics and prognostics may strongly depend on the vesicles being efficiently isolated, quantified and analyzed by e.g. reliable, high©\throughput and possibly easy©\to©\operate microfluidic devices. The results reported here extend the previously reported work by Chen et al. [2]: (i) the fabrication approach is based on silicon as a micromolding master, which offers better dimensional control and durability than SU©\8 masters, (ii) a staggered herringbone micromixer [3] is introduced in three different channel configurations , (iii) the device assembly allows straightforward integration of a large variety of surface chemistries by introducing prefunctionalized glass slides; (iv) individual functionalization of the glass slide and the PDMS replica prior to assembly permits combination of two differently biofunctionalized surfaces within the same fluidic device; (v) isolated extracellular vesicles can be accessed directly for a variety of post©\analyses by opening the device assembly.

• Jansen, Aina; Skaug, Marit Aralt; Berg, Jens Petter & Aaseth, Jan (2014). Overvekt og milj?gifter.
• Reppe, Sjur; Sachse, D.; Olstad, Ole Kristoffer; Gautvik, Vigdis Teig; Sanderson, P.L. & Datta, H.K. [Show all 8 contributors for this article] (2012). Identification of human transcriptional macromolecular associations using browser based in silico analysis in a giant correlation matrix. Bone. ISSN 8756-3282. 50, p. S109¨CS109. doi: 10.1016/j.bone.2012.02.334.
• Rifai, Nader; Plebani, Mario; Wu, Alan; Brugnara, Carlo; Delvin, Edgard & Lamb, Edmund J. [Show all 9 contributors for this article] (2011). Full disclosure in industry-sponsored laboratory medicine research studies: Statement by the consortium of laboratory medicine journal editors. Clinical Chemistry. ISSN 0009-9147. 57(3), p. 359¨C360. doi: 10.1373/clinchem.2010.160721.
• Berg, Jens Petter (2011). Kapittel 17 Sykdommer i endokrine organer. In ?rn, Stein; Mjell, Johnny & Bach-Gansmo, Edvin (Ed.), Sykdom og behandling. Gyldendal Akademisk. ISSN 9788205323605. p. 363¨C378.
• Storsul, Tanja; Berg, Jens Petter; Urdal, Henrik; Sivertsen, Gunnar & R?eggen, Vidar (2024). Kvalitet i vitenskapelig publisering. Organisering og innretning av publiseringsindikatoren, publiseringsstatistikken og kanalregisteret. En utredning for Kunnskapsdepartementet. . Det nasjonale publiseringsutvalget.

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