Effect of Vasoactive Intestinal Peptide (VIP) on NKG2D Signal Pathway and Its Contribution to Immune Escape of MKN45 Cells

Table 3

The cytotoxicity of NK cells to MKN45 cells and VIP effect on it.

Group	n	OD490
A: MKN45 + NK + VIP (1 × 10^−5)	12	0.161±0.024^ab
B: MKN45 + NK + VIP (1 × 10^−6)	12	0.157±0.017^ab
C: MKN45 + NK + VIP (1 × 10^−7)	12	0.138±0.022^abc
D: MKN45 + VIP (1 × 10^−5)	12	0.196±0.019^b
E: MKN45 + VIP (1 × 10^−6)	12	0.200±0.028^b
F: MKN45 + VIP (1 × 10^−7)	12	0.201±0.025^b
G: MKN45 + NK	12	0.106±0.016^a
H: MKN45 (blank control)	12	0.209±0.026

𝐹=31.533, 𝑃<0.01. a stands for 𝑃<0.05 compared with group H. b stands for 𝑃<0.05 compared with group G. c stands for 𝑃<0.05 compared with group A.