title: Attenuation of oxidative stress and alteration of hepatic tissue ultrastructure by D-pinitol in streptozotocin-induced diabetic rats.
abstract: The present study was aimed to investigate the effect of D-pinitol on hyperglycaemia mediated oxidative stress by analysing the hepatic antioxidant competence, pro-inflammatory cytokines and ultrastructural changes in liver tissues of streptozotocin-induced diabetic rats. Oral administration of D-pinitol (50 mg/kg b.w.) resulted in significant (p < 0.05) attenuation in blood glucose, glycosylated haemoglobin and pro-inflammatory markers such as TNF-alpha, IL-1beta, IL-6, NF-kappaB p65 unit and NO and significant (p < 0.05) elevation in the plasma insulin level. In addition, D-pinitol instigated a significant escalation in the levels of hepatic tissue non-enzymatic antioxidants and the activities enzymatic antioxidants of diabetic rats with significant (p < 0.05) decrease in lipid peroxides and hydroperoxides formation, thus demonstrating the protective role of D-pinitol on the hepatic tissues from oxidative stress-induced liver damage. These biochemical observations were complemented by histological and ultrastructural examination of liver section. Thus, the present study demonstrates the hepatoprotective nature of D-pinitol by attenuating hyperglycaemia-mediated pro-inflammatory cytokines and oxidative stress.
authors.affiliation: Department of Biochemistry, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India.
authors.forename: Selvaraj
authors.initials: S
authors.lastname: Sivakumar
authors.forename: Periyasamy
authors.initials: P
authors.lastname: Palsamy
authors.forename: Sorimuthu Pillai
authors.initials: SP
authors.lastname: Subramanian
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D016207:Cytokines / Q000032:analysis / Q000378:metabolism; D003921:Diabetes Mellitus, Experimental / Q000473:pathology*; D004797:Enzyme-Linked Immunosorbent Assay; D007294:Inositol / Q000031:analogs & derivatives* / Q000494:pharmacology; D008099:Liver / Q000187:drug effects / Q000473:pathology*; D008297:Male; D046529:Microscopy, Electron, Transmission; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar; D013311:Streptozocin
chemical_list: D000975:Antioxidants; D016207:Cytokines; C021730:pinitol; D007294:Inositol; D013311:Streptozocin