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AIM: To explore the expression of PlexinA1 in gastric carcinoma and its relationship with tumor angiogenesis and proliferation. METHODS: PlexinA1 mRNA and protein expressions of Semaphorin6D were measured using semi-quantity reverse transcription PCR and Western blotting in 20 cases of gastric carcinoma and corresponding normal gastric mucosa. PlexinA1, Ki-67 expression and microvessel density (MVD) were detected by immunohistochemistry in 50 cases of gastric carcinoma and 20 cases of normal gastric mucosa. RESULTS: The mRNA and protein expressions of PlexinA1 in gastric carcinoma were significantly higher than that in normal gastric mucosa (0.71 ± 0.37 vs 0.60 ± 0.25, P = 0.0299 < 0.05, and 0.47 ± 0.16 vs 0.21 ± 0.08, P = 0.0000 < 0.01), and MVD within tumor tissues increased significantly with PlexinA1 mRNA expression (r =0.8736, P < 0.01) and PlexinA1 protein expression (r = 0.7286, P < 0.01), and MVD of the PlexinA1 positive staining group (25.25 ± 3.93) was significantly higher than that of the negative group (19.56 ± 1.75), (P < 0.01). Proliferation index of tumor cells within tumor tissues were positively correlated with PlexinA1 mRNA expression (r = 0.5420, P = 0.014 < 0.01) and PlexinA1 protein expression (r = 0.5024, P = 0.024 < 0.05). The proliferation index of the PlexinA1 positive staining group (567.69 ± 125.61) was signifi cantly higher than that of the negative group (369.58 ± 116.88), (P < 0.01). CONCLUSION: PlexinA1 may play an important role in the occurrence and development of gastric carcinoma, and be related to tumor angiogenesis and proliferation.
AIM: To explore the expression of Plexin A1 in gastric carcinoma and its relationship with tumor angiogenesis and proliferation. METHODS: Plexin A1 mRNA and protein expressions of Semaphorin 6D were measured using semi-quantity reverse transcription PCR and Western blotting in 20 cases of gastric carcinoma and corresponding normal gastric mucosa. Plexin A1, Ki-67 expression and microvessel density (MVD) were detected by immunohistochemistry in 50 cases of gastric carcinoma and 20 cases of normal gastric mucosa. RESULTS: The mRNA and protein expressions of Plexin A1 in gastric carcinoma were significantly higher than that in normal gastric mucosa (0.71 ± 0.37 vs 0.60 ± 0.25, P = 0.0299 <0.05, and 0.47 ± 0.16 vs 0.21 ± 0.08, P = 0.0000 <0.01), and MVD within tumor tissues increased significantly with Plexin A1 mRNA expression , P <0.01) and Plexin A1 protein expression (r = 0.7286, P <0.01), and MVD of the PlexinA1 positive staining group (25.25 ± 3.93) was significantly high (P <0.01), P <0.01). P <0.01). P <0.01) r = 0.5024, P = 0.024 <0.05). The proliferation index of the PlexinA1 positive staining group (567.69 ± 125.61) was signifi cantly higher than that of the negative group (369.58 ± 116.88), (P <0.01). CONCLUSION: PlexinA1 may play an important role in the occurrence and development of gastric carcinoma, and be related to tumor angiogenesis and proliferation.