Table II.

Comparison of Ngn1 and BMP4 mRNA expression levels the different NSC groups.

Group	Ngn1	BMP4
CON	0.33±0.02	0.44±0.01
NC+N	0.37±0.03a	0.32±0.02a
NC+HIBD	0.44±0.03a,b	0.17±0.03a,b
siNSCs+N	0.19±0.02a–c	0.72±0.04a–c
siNSCs+HIBD	0.17±0.03a–c	0.65±0.06a–c

Data presented as relative optical density value (χ±s).

^aP<0.01 vs. CON group;

^bP<0.01 vs. NC+N group;

^cP<0.01 vs. NC+HIBD group. Ngn1, neurogenin 1; BMP4, bone morphogenetic protein 4; NSC, neural stem cell; CON, blank control group; NC, negative control plasmid-transfected cells; N, normal brain tissue; HIBD, hypoxic-ischemic brain damage tissue; siNSC, β-catenin small interfering RNA-transfected cell.