Table 1.

The effects of SNP and CHR21 on the activities of tNOS, iNOS, and cNOS ^a.

Groups	tNOS(U/mL)	iNOS(U/mL)	cNOS(U/mL)
ctrl	8.31 ± 0.44	4.63 ± 0.43	3.68 ± 0.12
CHR20	8.76 ± 0.50	4.61 ± 0.27	4.15 ± 0.17 &
CHR21	9.04 ± 0.60	4.54 ± 0.33	4.50 ± 0.18 &
SNP	7.54 ± 0.27 *	6.27 ± 0.13 *	1.27 ± 0.06 *
SNP + CHR20	9.78 ± 0.31 #	5.21 ± 0.24 #	4.57 ± 0.26 #
SNP + CHR21	9.86 ± 0.35 #	5.09 ± 0.26 #	4.77 ± 0.29 #

^a RGC-5 cells were treated with CHR21 (30 µM), SNP (750 µM), and CHR21 (30 µM) + SNP (750 µM), respectively. RGC-5 cells without addition of either CHR21 or SNP were set as the control group. The activities of tNOS (total NOS), cNOS (constructive NOS) and iNOS (inducible NOS) were tested by a Typed Nitric Oxide Synthase (NOS) Detection Kit. tNOS: total nitric oxide synthase; cNOS: constitutive nitric oxide synthase; iNOS: inducible nitric oxide synthase. U/mL: 1 nmol of NO formed/ml Cell Lysates in one minute. Activities of tNOS, iNOS and cNOS were tested by the Typed Nitric Oxide Synthase (NOS) Detection Kit. * p < 0.05 compared with ctrl group; ^# p < 0.05 compared with SNP group; ^& p < 0.05 compared with control group. (n = 3). All values are expressed as mean ± SD (n = 3).