Abstract
To examine the association of connexin 43 (Cx43) in the intraperitoneal free gastric cancer cells and clinicopathological characteristics. Immunohistochemistry and immunofluorescence staining were used to detect connexin 43 in 75 paraffin-embedded gastric cancer tissues, matched paracancerous tissue, and intraperitoneal free gastric cancer cells. The positive rates of Cx43 expression were 33.3% (25/75) in gastric cancer tissue specimens and 100% (75/75) in matched paracancerous tissue (P<0.01). The positive detection rate of free cancer cells in peritoneal lavage was 38.6% (29/75) and the positive rate of Cx43 in peritoneal free gastric cancer cells was 72.4% (21/29), which was significantly higher than that in gastric cancer tissue specimens (P<0.01). Significant association was observed of Cx43 expression of free gastric cancer cells with tumor infiltration and histological type (P<0.05). Cx43 gene may be involved in the mechanism of peritoneal metastasis of gastric cancer.
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