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/
activation provides enhanced improvement of
insulin sensitivity and glycemic control in ZDF rats
1 Research and Development, Novo Nordisk, DK-2880 Bagsvaerd, Denmark; and 2 Garvan Institute of Medical Research, Darlinghurst, Sydney 2010, Australia
Improvement of insulin
sensitivity and lipid and glucose metabolism by coactivation of both
nuclear peroxisome proliferator-activated receptor (PPAR)
and
PPAR
potentially provides beneficial effects over existing PPAR
and
preferential drugs, respectively, in treatment of type 2 diabetes. We examined the effects of the dual PPAR
/
agonist
ragaglitazar on hyperglycemia and whole body insulin sensitivity in
early and late diabetes stages in Zucker diabetic fatty (ZDF) rats and
compared them with treatment with the PPAR
preferential agonist
rosiglitazone. Despite normalization of hyperglycemia and Hb
A1c and reduction of plasma triglycerides by both compounds in both prevention and early intervention studies, ragaglitazar treatment resulted in overall reduced circulating insulin and improved
insulin sensitivity to a greater extent than after treatment with
rosiglitazone. In late-intervention therapy, ragaglitazar reduced Hb
A1c by 2.3% compared with 1.1% by rosiglitazone.
Improvement of insulin sensitivity caused by the dual PPAR
/
agonist ragaglitazar seemed to have beneficial impact over that of the
PPAR
-preferential activator rosiglitazone on glycemic control in
frankly diabetic ZDF rats.
euglycemic clamp; peroxisome proliferator-activated receptor; ragaglitazar; rosiglitazone; type 2 diabetes; Zucker diabetic fatty
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