Induction of lung lesions in Wistar rats by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone and its inhibition by aspirin and phenethyl isothiocyanate

Table 2 The effects of aspirin or/and PEITC on the expressions of PCNA and COX-2

Group	Number of rat	% Cells Positive for PCNA Mean (SD)	Scores for COX-2 Mean (SD)
A.aspirin	10	12.05(8.81)	2.08(0.72)^◆
B.PEITC	10	10.92(11.55)	2.34(0.95)
C.asprin + PEITC	10	4.25(5.27)^◆◆	1.60(0.73)^◆◆
D.Positive control	8	24.48(9.14) **	3.13(0.88) **
E.Negative control	9	1.17(0.56)	0.67(0.35)

ISSN: 1471-2407