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Islet protein profiling
-
- Bergsten, P (author)
- Uppsala universitet,Institutionen för medicinsk cellbiologi
- (creator_code:org_t)
- Wiley, 2009
- 2009
- English.
- In: Diabetes, obesity and metabolism. - : Wiley. - 1462-8902 .- 1463-1326. ; 11, s. 97-117
- Journal article (peer-reviewed)
Abstract
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- Islet protein profiling is defined as generation of extended protein expression data sets from islets or islet cells. Islets from rodent control and animal models of type 1 and type 2 diabetes mellitus and healthy humans and insulin- and glucagon-producing cell lines have been used. Protein profiling entails separation, differential expression determination, identification and expression analysis. Protein/peptide separation is either gel-based or by chromatography. Differential expression is based on comparison of visualized spots/proteins between gels or by sample labelling in gel-free systems. Identification of proteins is made by tryptic fragmentation of proteins, fragment mass determination and mass comparison with protein databases. Analysis of expression data sets interprets the complex protein changes into cellular mechanisms to generate hypotheses. The importance of such protein expression sets to elucidate islet cellular events is evidenced by the observation that only about 50% of the differentially expressed proteins and transcripts showed concordance when measured in parallel. Using protein profiling, different areas related to islet dysfunction in type 1 and type 2 diabetes mellitus have been addressed, including dysfunction induced by elevated levels of glucose and fatty acids and cytokines. Because islets from individuals with type 1 or type 2 diabetes mellitus have not yet been protein profiled, islets from rat (BB-DP) and mouse (NOD, ob/ob, MKR) models of the disease have been used, and mechanisms responsible for islet dysfunction delineated offering avenues of intervention.
Keyword
- beta-cell
- chromatography
- diabetes
- islet
- mass spectrometry
- peptide mass fingerprinting
- protein profiling
- proteomics
- two-dimensional gel electrophoresis
- MEDICINE
- MEDICIN
Publication and Content Type
- ref (subject category)
- art (subject category)
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