title: mRNA and Protein levels of rat pancreas specific protein disulphide isomerase are downregulated during Hyperglycemia.
abstract: Diabetes (Type I and Type II) which affects nearly every organ in the body is a multi-factorial non-communicable disorder. Hyperglycemia is the most characteristic feature of this disease. Loss of beta cells is common in both types of diabetes whose detailed cellular and molecular mechanisms are yet to be elucidated. As this disease is complex, identification of specific biomarkers for its early detection, management and devising new therapies is challenging. Based on the fact that functionally defective proteins provide the biochemical basis for many diseases, in this study, we tried to identify differentially expressed proteins during hyperglycemia. For that, hyperglycemia was induced in overnight fasted rats by intra-peritoneal injection of streptozotocin (STZ). The pancreas was isolated from control and treated rats for subsequent analyses. The 2D-gel electrophoresis followed by MALDI-TOF-MS-MS analyses revealed several up- and down-regulated proteins in hyperglycemic rat pancreas including the downregulation of a pancreas specific isoform of protein disulphide isomerase a2 (Pdia2).This observation was validated by western blot. Quantitative PCR experiments showed that the level of Pdia2 mRNA is also proportionally reduced in hyperglycemic pancreas.
authors.forename: Rajani
authors.initials: R
authors.lastname: Gupta
authors.forename: Kaushik
authors.initials: K
authors.lastname: Bhar
authors.forename: Nandini
authors.initials: N
authors.lastname: Sen
authors.forename: Debajit
authors.initials: D
authors.lastname: Bhowmick
authors.forename: Satinath
authors.initials: S
authors.lastname: Mukhopadhyay
authors.forename: Koustubh
authors.initials: K
authors.lastname: Panda
authors.forename: Anirban
authors.initials: A
authors.lastname: Siddhanta
mesh_terms: D000818:Animals; D015536:Down-Regulation; D006943:Hyperglycemia / Q000201:enzymology*; D008297:Male; D010179:Pancreas / Q000201:enzymology*; D019704:Protein Disulfide-Isomerases / Q000032:analysis / Q000235:genetics*; D040901:Proteomics; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017208:Rats, Wistar; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D012333:RNA, Messenger; D019704:Protein Disulfide-Isomerases