. 2011 Jul 6;9:103. doi: 10.1186/1479-5876-9-103

Table 1.

Circulating levels of testosterone, IGF-I and insulin in the three experimental groups.

	Young controls (yCO) (n = 8)	Untreated old rats (O) (n = 8)	Old rats treated with IGF-II (O+IGF-II) (n = 8)
Free testosterone (pg/mL)	6.50 ± 1.16	4.01 ± 0.76^a	4.07 ± 1.34^a
IGF-I (ng/mL)	978.92 ± 63.66	629.12 ± 16.56^a	656.00 ± 25.57^a
Insulin (ng/mL)	0.45 ± 0.08	1.54 ± 0.43^a	1.12 ± 0.10
Total Antioxidant Status (mmol/L)	0.87 ± 0.01	0.79 ± 0.01^a	0.87 ± 0.02^b

Effect of IGF-II treatment on serum total antioxidant status.

Values are expressed as ± SEM.

^aP < 0.05 vs yCO

^bP < 0.05 vs O