Attenuation of Zn-induced acute pancreatitis in Wistar rat fed on Cu- and Mg- enriched modified poultry egg Psi.
Zinc (Zn) consumption has increased in many populations either due to the increased intake of Zn-fortified foods as in the USA or in agricultural food stuffs as in some Indian states during the last decade. Its excessive intake has been reported to induce acute pancreatitis (AP) in many studies due to increase in oxidative stress that was further reported to cause Cu and Mg deficiencies. This led us to design a modified poultry egg (ME(Psi)) enriched with Cu and Mg along with other antioxidants, and its efficacy on Zn-induced AP was studied in male Wistar rats. In one set, the rats were fed on equacaloric semi-synthetic basal diet containing 20 mg Zn/kg diet (control, group I), and Zn-induced AP-I diet and AP-II diet containing 40 and 80 mg Zn/kg diet (groups II and III) for 180 days, respectively. In another set, the rats were initially fed on Zn-induced AP-I and AP-II diets for 90 days and then shifted to ME(Psi)-mixed Zn-induced AP-I and AP-II diets in groups IIME and IIIME for another 90 days. At the end of the experiment, data displayed increased serum and urinary Zn, Cu, and Mg levels in groups II and III rats, which were reduced and approached closer to control group I after ME(Psi) feeding in groups IIME and IIIME rats. Transmission electron microscopic studies of acinar cells revealed progressive dilation, vesicularization, and degeneration of endoplasmic reticulum (ER), and decrease in zymogen granules (ZG) in groups II and III rats in contrast to their curvilinear or concentric long parallel running cisternal profile of ER in control group I. The treatment of ME(Psi) helped in the restoration of the ER profile and ZG number, approaching closer to the control group I. The degree of recovery was dependent upon the degree of toxicity caused by the amount of Zn given in the diet. The results of this study suggest that ME(Psi)-mixed diet can protect the acinar cells from the deleterious effects of Zn by decreasing the oxidative stress.
Taneja
Satish Kumar
SK
Department of Zoology, Panjab University, Chandigarh, 160014, India. sktaneja@gmail.com
Mandal
Reshu
R
D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage* / Q000378:metabolism; D003300:Copper / Q000008:administration & dosage* / Q000378:metabolism; D004032:Diet; D004531:Eggs; D008274:Magnesium / Q000008:administration & dosage* / Q000378:metabolism; D008297:Male; D046529:Microscopy, Electron, Transmission; D019283:Pancreatitis, Acute Necrotizing / Q000139:chemically induced / Q000517:prevention & control*; D011200:Poultry / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D015032:Zinc / Q000037:antagonists & inhibitors* / Q000633:toxicity
D000975:Antioxidants; D003300:Copper; D008274:Magnesium; D015032:Zinc