Browsing Bergen Open Research Archive by Author "Ræder, Helge"
Now showing items 1-20 of 24
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Anatomy and evolution of database search engines — a central component of mass spectrometry based proteomic workflows
Verheggen, Kenneth; Ræder, Helge; Berven, Frode; Martens, Lennart Martens; Barsnes, Harald; Vaudel, Marc (Peer reviewed; Journal article, 2017-09-13)Sequence database search engines are bioinformatics algorithms that identify peptides from tandem mass spectra using a reference protein sequence database. Two decades of development, notably driven by advances in mass ... -
Bioinformatic analyses of miRNA-mRNA signature during hiPSC differentiation towards insulin-producing cells upon HNF4α mutation
Ghila, Luiza; Bjørlykke, Yngvild; Legøy, Thomas Aga; Vethe, Heidrun; Furuyama, Kenichiro; Chera, Simona; Ræder, Helge (Journal article; Peer reviewed, 2020)Mutations in the hepatocyte nuclear factor 4α (HNF4α) gene affect prenatal and postnatal pancreas development, being characterized by insulin-producing β-cell dysfunction. Little is known about the cellular and molecular ... -
The Chromosome 9p21 CVD- and T2D-Associated Regions in a Norwegian Population (The HUNT2 Survey)
Helgeland, Øyvind; Hertel, Jens Kristoffer; Molven, Anders; Ræder, Helge; Platou, Carl Geoffrey Parrinder; Midthjell, Kristian; Hveem, Kristian; Nygård, Ottar; Njølstad, Pål R.; Johansson, Stefan (Peer reviewed; Journal article, 2015)Background. Two adjacent regions upstream CDKN2B on chromosome 9p21 have been associated with type 2 diabetes (T2D) and progression of cardiovascular disease (CVD).The precise location and number of risk variants have not ... -
Chronically elevated exogenous glucose elicits antipodal effects on the proteome signature of differentiating human iPSC-derived pancreatic progenitors
Ghila, Luiza; Legøy, Thomas Aga; Mathisen, Andreas Frøslev; Abadpour, Shadab; Paulo, Joao A.; Scholz, Hanne Bjørnson; Ræder, Helge; Chera, Simona (Journal article; Peer reviewed, 2021-04-02)The past decade revealed that cell identity changes, such as dedifferentiation or transdifferentiation, accompany the insulin-producing β-cell decay in most diabetes conditions. Mapping and controlling the mechanisms ... -
The effect of WnT pathway modulators on human iPSC-derived pancreatic beta cell maturation
Vethe, Heidrun; Ghila, Luiza; Berle, Magnus; Hoareau, Laurence; Haaland, Øystein Ariansen; Scholz, Hanne; Paulo, Joao A.; Chera, Simona; Ræder, Helge (Peer reviewed; Journal article, 2019-05-08)Current published protocols for targeted differentiation of human stem cells toward pancreatic β-cells fail to deliver sufficiently mature cells with functional properties comparable to human islet β-cells. We aimed to ... -
Encapsulation boosts islet-cell signature in differentiating human induced pluripotent stem cells via integrin signalling
Legøy, Thomas Aga; Vethe, Heidrun; Abadpour, Shadab; Strand, Berit Løkensgard; Scholz, Hanne; Paulo, Joao A.; Ræder, Helge; Ghila, Luiza; Chera, Simona (Journal article; Peer reviewed, 2020)Cell replacement therapies hold great therapeutic potential. Nevertheless, our knowledge of the mechanisms governing the developmental processes is limited, impeding the quality of differentiation protocols. Generating ... -
Evaluation of four novel genetic variants affecting hemoglobin A1c levels in a population-based type 2 diabetes cohort (the HUNT2 study)
Hertel, Jens Kristoffer; Johansson, Stefan; Ræder, Helge; Platou, Carl G. P.; Midthjell, Kristian; Hveem, Kristian; Molven, Anders; Njølstad, Pål Rasmus (Peer reviewed; Journal article, 2011-02-04)<b>Background:</b> Chronic hyperglycemia confers increased risk for long-term diabetes-associated complications and repeated hemoglobin A1c (HbA1c) measures are a widely used marker for glycemic control in diabetes treatment ... -
Evaluation of traditional versus case-based lecture satisfaction and learning outcomes in a Pediatrics course
Ræder, Helge (UPED-skrift, Working paper, 2017) -
Exploring the potential of public proteomics data
Vaudel, Marc; Verheggen, Kenneth; Csordas, Attila; Ræder, Helge; Berven, Frode; Martens, Lennart; Vizcaíno, Juan Antonio; Barsnes, Harald (Peer reviewed; Journal article, 2016)In a global effort for scientific transparency, it has become feasible and good practice to share experimental data supporting novel findings. Consequently, the amount of publicly available MS‐based proteomics data has ... -
Hereditary hypophosphatemia in Norway: A retrospective population-based study of genotypes, phenotypes, and treatment complications
Rafaelsen, Silje Hjorth; Johansson, Stefan; Ræder, Helge; Bjerknes, Robert (Peer reviewed; Journal article, 2016-02)Objective: Hereditary hypophosphatemias (HH) are rare monogenic conditions characterized by decreased renal tubular phosphate reabsorption. The aim of this study was to explore the prevalence, genotypes, phenotypic spectrum, ... -
HNF4A haploinsufficiency in MODY1 abrogates liver and pancreas differentiation from patient-derived induced pluripotent stem cells
Ng, Natasha Hui Jin; Jasmen, Joanita Binte; Lim, Chang Siang; Lau, Hwee Hui; Krishnan, Vidhya Gomathi; Kadiwala, Juned; Kulkarni, Rohit N.; Ræder, Helge; Vallier, Ludovic; Hoon, Shawn; Teo, Adrian Kee Keong (Peer reviewed; Journal article, 2019-06-28)Maturity-onset diabetes of the young 1 (MODY1) is a monogenic diabetes condition caused by heterozygous HNF4A mutations. We investigate how HNF4A haploinsufficiency from a MODY1/HNF4A mutation influences the development ... -
Human organotypic airway and lung organoid cells of bronchiolar and alveolar differentiation are permissive to infection by influenza and SARS-CoV-2 respiratory virus
Ekanger, Camilla Tvedt; Zhou, Fan; Bohan, Dana; Lotsberg, Maria Lie; Ramnefjell, Maria; Hoareau, Laurence; Røsland, Gro Vatne; Lu, Ning; Aanerud, Marianne; Gärtner, Fabian; Salminen, Pirjo-Riitta; Bentsen, Mariann; Halvorsen, Thomas; Ræder, Helge; Akslen, Lars Andreas; Langeland, Nina; Brokstad, Rebecca Jane Cox; Maury, Wendy; Stuhr, Linda Elin Birkhaug; Lorens, James; Engelsen, Agnete Svendsen Tenfjord (Journal article; Peer reviewed, 2022)The ongoing coronavirus disease 2019 (COVID-19) pandemic has led to the initiation of unprecedented research efforts to understand the pathogenesis mediated by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). ... -
In vivo environment swiftly restricts human pancreatic progenitors toward mono-hormonal identity via a HNF1A/HNF4A mechanism
Legøy, Thomas Aga; Mathisen, Andreas Frøslev; Salim, Zaidon; Vethe, Heidrun; Bjørlykke, Yngvild; Abadpour, Shadab; Paulo, Joao; Scholz, Hanne; Ræder, Helge; Ghila, Luiza; Chera, Simona (Journal article; Peer reviewed, 2020)Generating insulin-producing β-cells from human induced pluripotent stem cells is a promising cell replacement therapy for improving or curing insulin-dependent diabetes. The transplantation of end-stages differentiating ... -
In vivo hyperglycemia exposure elicits distinct period-dependent effects on human pancreatic progenitor differentiation, conveyed by oxidative stress
Legøy, Thomas Aga; Ghila, Luiza; Vethe, Heidrun; Abadpour, Shadab; Mathisen, Andreas; Paulo, Joao A.; Scholz, Hanne; Ræder, Helge; Chera, Simona (Peer reviewed; Journal article, 2020)Aim: The loss of insulin‐secreting β‐cells, ultimately characterizing most diabetes forms, demands the development of cell replacement therapies. The common endpoint for all ex vivo strategies is transplantation into ... -
KRAS mutation analysis by droplet digital PCR of duodenal juice from patients with MODY8 and other pancreatic diseases
Choi, Man Hung; Tjora, Erling; Forthun, Rakel Brendsdal; Engjom, Trond; Ræder, Helge; Hovland, Randi; Molven, Anders (Journal article; Peer reviewed, 2021)Background Maturity-onset diabetes of the young type 8 (MODY8 or CEL-MODY) is an inherited pancreatic disease characterized by chronic inflammation of the pancreas and diabetes. It is not known whether MODY8 patients ... -
Leptin receptor signaling regulates protein synthesis pathways and neuronal differentiation in pluripotent stem cells
Gupta, Manoj K.; Vethe, Heidrun; Softic, Samir; Rao, Tata Nageswara; Wagh, Vilas; Shirakawa, Jun; Barsnes, Harald; Vaudel, Marc; Takatani, Tomozumi; Kahraman, Sevim; Sakaguchi, Masaji; Martinez, Rachael; Hu, Jiang; Bjørlykke, Yngvild; Ræder, Helge; Kulkarni, Rohit N. (Journal article; Peer reviewed, 2020)The role of leptin receptor (OB-R) signaling in linking pluripotency with growth and development and the consequences of dysfunctional leptin signaling on progression of metabolic disease is poorly understood. Using a ... -
Long-term clinical outcome and phenotypic variability in hyperphosphatemic familial tumoral calcinosis and hyperphosphatemic hyperostosis syndrome caused by a novel GALNT3 mutation; case report and review of the literature
Rafaelsen, Silje Hjorth; Johansson, Stefan; Ræder, Helge; Bjerknes, Robert (Peer reviewed; Journal article, 2014-09-24)Background: Hyperphosphatemic Familial Tumoral Calcinosis (HFTC) and Hyperphosphatemic Hyperostosis Syndrome (HHS) are associated with autosomal recessive mutations in three different genes, FGF23, GALNT3 and KL, leading ... -
MicroRNAs in Differentiation of Embryoid Bodies and the Teratoma Subtype of Testicular Cancer
Myklebust, Mette Pernille; Søviknes, Anne Mette; Halvorsen, Ole Johan; Thor, Anna; Dahl, Olav; Ræder, Helge (Journal article; Peer reviewed, 2022)Background: Testicular germ cell tumours (TGCTs) are the most frequent tumour type among young, adult men. TGCTs can be efficiently treated, but metastases of the teratoma subtype, for which there are no circulating ... -
Modulating Wnt signaling in human induced pluripotent stem cell-derived S7 cells
Vethe, Heidrun; Ghila, Luiza; Berle, Magnus; Hoareau, Laurence; Haaland, Øystein Ariansen; Scholz, Hanne; Paulo, Joao A.; Chera, Simona; Ræder, Helge (Peer reviewed; Journal article, 2019)Current published protocols for targeted differentiation of human stem cells toward pancreatic β-cells fail to deliver sufficiently mature cells with functional properties comparable to human islet β-cells. We aimed to ... -
A national intercalated medical student research program–student perceptions, satisfaction, and factors associated with pursuing a PhD
Sandvei, Marie Søfteland; Jacobsen, Geir Wenberg; Stien, Marianne Heldal; Ræder, Helge; Munthe, Ludvig Andre; Skogen, Vegard (Journal article; Peer reviewed, 2022)Background: To counteract a decreasing number of physician-scientists, a national intercalated Medical Student Research Programme (MSRP) was launched in Norway in 2002. We aimed to assess whether the students’ favourable ...