Gene Name

 

Fold Change

Growth arrest and DNA-damage-inducible, beta (GADD45B)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

2.7 ± 0.001 * †

 

 

 

 

Down-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

-1.8 ± 0.002 * †

 

 

 

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

8.4 ± 0.001 * †

 

Up-regulated by pioglitazone & palmitate vs. palmitate in non-diabetic human islets

2.0 ± 0.001 * †

 

 

 

 

Down-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

-7.1 ± 0.001 * †

 

 

 

Pancreatic polypeptide (PPY)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

4.1 ± 0.002 * †

 

 

 

 

Up-regulated by pioglitazone & palmitate vs. palmitate in non-diabetic human islets

4.7 ± 0.001 * †

 

 

 

 

Up-regulated by palmitate vs. control in diabetic human islets

6.6 ± 0.001 * †

 

 

 

Regenerating islet-derived 3 alpha (REG3A)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

2.1 ± 0.002* †

 

Up-regulated by pioglitazone & palmitate vs. palmitate in non-diabetic human islets

5.2 ± 0.001* †

 

 

 

 

Down-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

-8.4 ± 0.001* †

 

 

 

 

Up-regulated by palmitate vs. control in diabetic human islets

10.3 ± 0.002* †

 

 

 

Thioredoxin interacting protein  (TXNIP)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

12.6 ± 0.002 * †

 

 

 

 

Up-regulated by pioglitazone & palmitate vs. palmitate in non-diabetic human islets

16.0 ± 0.002* †

 

 

 

 

Down-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

-16.6 ± 0.002* †

 

 

 

Carboxyl ester lipase (CEL)

Up-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

6.7 ± 0.001 * †

 

 

 

 

Up-regulated by exenatide & palmitate vs. palmitate in diabetic human islets

7.2 ± 0.001 *†

 

 

 

Aryl hydrocarbon receptor nuclear translocator (ARNT)

Down -regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

-14.9 ± 0.001 * †

 

 

 

 

Up-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

14.7 ± 0.001 * †

 

 

 

 

Up-regulated by exenatide & palmitate vs. palmitate in diabetic human islets

3.2 ± 0.002 *†

 

 

 

ISL1 transcription factor, LIM/homeodomain (ISL1)

Down-regulated by exenatide & palmitate vs. palmitate in diabetic human islets

-3.1 ± 0.001 *†

 

 

 

 

Up-regulated by palmitate vs. control in diabetic human islets

2.3 ± 0.001* †

 

 

 

Transcription factor 4 (TCF4/TCF7L2)

Down-regulated by pioglitazone & palmitate vs. palmitate in diabetic human islets

-1.9 ± 0.002 * †

 

 

 

 

Down-regulated by exenatide & palmitate vs. palmitate in diabetic human islets

-2.0 ± 0.002 *†

 

 

 

 

Up-regulated by palmitate vs. control in diabetic human islets

5.1 ± 0.002* †

 

 

 

Defender against cell death 1 (DAD1)

Up-regulated by exenatide & palmitate vs. palmitate in non-diabetic human islets

7.9 ± 0.002 * †

 

 

 

 

Up-regulated by pioglitazone & palmitate vs. palmitate in non-diabetic human islets

4.1 ± 0.002 * †

 

 

 

 

Up-regulated by palmitate vs. control in diabetic human islets

2.1 ± 0.001* †

|Results are means ± SEM of 2 experiments. * denotes P<0.05 for a chance difference vs controls using Student’s unpaired t-test. † denotes that the correlation between micoarray and qRT-PCR is significant at the P<0.01 level.
Table 5: Validation by qRT-PCR of differently regulated human islet transcripts identified by microarray analysis.