Abstract:
:Pterostilbene (PTS), a naturally occurring stilbene, confers protection against oxidative and cytokine stress induced pancreatic β-cell apoptosis in vitro and in vivo. To provide insights into the molecular mechanism, we performed a proteomic study on the pancreas of PTS-treated diabetic mice using electrospray ionization tandem-mass spectrometry (LC-MS/MS). A total of 1,260 proteins were detected in triplicate samples. Of which, 359 proteins were found to be differentially regulated in streptozotocin-induced diabetic mice pancreas with two fold difference ( P < 0.05, two or more peptides) and on PTS treatment 315 proteins were normalized to control levels. Gene ontology (GO) indicated that majority of the differentially regulated proteins are involved in cellular functions such as metabolism, cellular structure, oxidative stress, endoplasmic-reticulum-associated protein degradation (ERAD) pathway and several stress sensors. Protein-protein interaction network analysis of these differentially expressed proteins showed clustering of proteins involved in protein processing in endoplasmic reticulum (protein synthesis machinery and protein folding), oxidative phosphorylation/oxidative stress proteins, oligosaccharide metabolic process, and antioxidant activity. Our results highlighted that PTS administration rehabilitated the defective metabolic process and redox imbalance, and also suppressed the unfolded protein response and ERAD pathways. The effects on targeting ER machinery and suppressing oxidative stress suggest the great potential of PTS for diabetes management.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Dornadula S,Thiruppathi S,Palanisamy R,Umapathy D,Suzuki T,K Mohanram Rdoi
10.1002/jcp.26835subject
Has Abstractpub_date
2019-03-01 00:00:00pages
1996-2012issue
3eissn
0021-9541issn
1097-4652journal_volume
234pub_type
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