Abstract
To explore the regulator of G-protein signaling 5 (RGS5) expression in gastric carcinoma and its association with differentiation and microvascular density (MVD). Expression of RGS5 and CD34 were examined in 76 cases of gastric carcinoma, including 22 cases with lymph node metastasis and 54 cases without lymph node metastasis determined by immunohistochemistry (IHC). MVD was assessed using CD34 monoclonal antibody. The presence of RGS5 and CD34 was analyzed by IHC using the Envision technique. The RGS5 expression in gastric carcinoma was positively correlated with the differentiation of the tumor (r = 0.345, P < 0.001), but not related with age, gender, tumor size, clinical stage and lymph node metastasis (P > 0.05). The average MVD in the group with lymph node metastasis was significantly higher than that in the group without lymph node metastasis (P < 0.05). RGS5 expression was negatively correlated with the average MVD (P < 0.05). RGS5 expression level in gastric carcinoma is associated with the differentiation and MVD of the tumor, and may be used as an important parameter for determining the prognosis of gastric carcinoma patients.
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