1
S described elsewhere [79]. For molecular and biochemical assays, cerebella were snap-frozen in a dry ice-methanol bath and stored at -80 . We studied cerebellar tissue because the cerebellum: 1) requires intact insulin/IGF signaling to maintain its structural and functional integrity [80,81]; 2) is severely damaged by i.c.-STZ mediated neurodegeneration [19,22]; 3) although relatively spared, it
1
S described elsewhere [79]. For molecular and biochemical assays, cerebella were snap-frozen in a dry ice-methanol bath and stored at -80 . We studied cerebellar tissue because the cerebellum: 1) requires intact insulin/IGF signaling to maintain its structural and functional integrity [80,81]; 2) is severely damaged by i.c.-STZ mediated neurodegeneration [19,22]; 3) although relatively spared, it
1
Fasting blood glucose and serum insulin concentrations were significantly lower in the LFD+VEH treated control group compared with all other groups. The mean levels of both serum glucose and insulin were next higher in the LFD+NDEA group, followed by the HFD group. The HFD+NDEA treated rats had the highest mean serum glucose and insulin levels. Correspondingly, serum leptin levels were significant
1
Sulin receptor substrate gene expression, and reduced expression of tau and choline acetyltransferase (ChAT), which are regulated by insulin and IGF-1. In addition, increased levels of 4-hydroxynonenal and nitrotyrosine were measured in cerebella of HFD ?NDEA treated rats, and overall, NDEA+HFD treatment reduced brain levels of Tau, phospho-GSK-3b (reflecting increased GSK-3b activity), glial fibr
1
Ds, and cholesterol levels compared with LFD+VEH and LFD +NDEA treated groups. In addition, the serum free fatty acid level was significantly lower in the LFD+NDEA compared with LFD+VEH treated rats, whereas the triglyceride and cholesterol levels were similar in the two groups. Therefore, hyperglycemia, hyper-insulinemia, and hyper-leptinemia were features of chronic HFD feeding, and worsened by
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N exist inTable 2 High Fat Diet Feeding and NDEA Treatment Cause Type 2 Diabetes MellitusAssay Body Wt (g) Glucose (mg/dL) Insulin (ng/ml) Leptin Adiponectin Triglyceride (mg/ml) Free Fatty Acids (mM/mg prot) Cholesterol (mg/ml) LFD+VEH 265.100 ?14.050 111.5 ?1.66 0.0611 ?0.017 4.649 ?0.789 20864 ?1454 0.399 ?0.028 0.150 ?0.003 0.943 ?0.024 LFD+NDEA 266.600 ?19.970 128.8* ?4.31 0.163* ?0.038 4.775
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N exist inTable 2 High Fat Diet Feeding and NDEA Treatment Cause Type 2 Diabetes MellitusAssay Body Wt (g) Glucose (mg/dL) Insulin (ng/ml) Leptin Adiponectin Triglyceride (mg/ml) Free Fatty Acids (mM/mg prot) Cholesterol (mg/ml) LFD+VEH 265.100 ?14.050 111.5 ?1.66 0.0611 ?0.017 4.649 ?0.789 20864 ?1454 0.399 ?0.028 0.150 ?0.003 0.943 ?0.024 LFD+NDEA 266.600 ?19.970 128.8* ?4.31 0.163* ?0.038 4.775
1
Agent for RNA extraction and QuantiTect SYBR Green PCR Mix were obtained from Qiagen, Inc (Valencia, CA). The AMV 1st Strand cDNAPostnatal day 3 (P3) Long Evans rat pups (mean body weight 10 g) were given 3 alternate day intra-peritoneal (i.p.) injections of 20 g NDEA or vehicle. Upon weaning, male rats (N = 8-10 per group) were pair-fed for 8 weeks with high fat (HFD) or low fat (LFD) chow diets.

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