Organophosphorus insecticide, monocrotophos, possesses the propensity to induce insulin resistance in rats on chronic exposure

被引:30
作者
Nagaraju, Raju [1 ]
Joshi, Apurva Kumar Ramesh [1 ]
Rajini, Padmanabhan Sharda [1 ]
机构
[1] Cent Food Technol Res Inst, Council Sci & Ind Res, Food Protectants & Infestat Control Dept, Mysore 570013, Karnataka, India
关键词
glucose homeostasis; hypertriglyceridemia; insulin resistance; monocrotophos; organophosphorus insecticides; PERSISTENT ORGANIC POLLUTANTS; SERUM CONCENTRATIONS; METABOLIC SYNDROME; GENE-EXPRESSION; HYPERGLYCEMIA; GLUCOSE; OBESITY; MECHANISMS; LIVER; GLUCOCORTICOIDS;
D O I
10.1111/1753-0407.12158
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
BackgroundOur earlier studies had shown that monocrotophos (MCP), an organophosphorus insecticide (OPI), has the propensity to augment the secondary complications associated with type-1 diabetes. The present study investigates whether rats exposed for prolonged periods to monocrotophos would develop insulin resistance mediated by alteration in glucose homeostasis. MethodsMale rats were administered sublethal doses of monocrotophos daily for 180 days. Interim blood samples were collected to measure alteration in blood glucose and lipid profile. Rats were also subjected to glucose and insulin tolerance test and fasting blood glucose and insulin levels were measured to calculate insulin resistance by HOMA-IR method. After 180 days, the rats were also evaluated for pancreatic histology and activities of hepatic gluconeogenetic enzymes. ResultsMonocrotophos elicited a gradual and sustained increase in blood glucose and insulin resistance in rats with concomitant glucose intolerance and reduced insulin sensitivity. MCP exposure was also associated with increase in weights of key white adipose pads, activities of gluconeogenesis enzymes and increase in pancreatic islet diameter, all of which led to hyperglycemia, hyperinsulinemia and dyslipidaemia. ConclusionLong-term exposure of rats to MCP resulted in glucose intolerance with hyperinsulinemia, a hallmark of insulin resistance. Our data suggest that chronic exposure to low doses of monocrotophos, might lead to development of insulin resistance by altering lipid profile and glucose homeostasis.
引用
收藏
页码:47 / 59
页数:13
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