Reducing peritoneal vascular endothelial growth factor concentration and inhibiting cancer scattering in a mouse model of laparoscopy

Correlation of the expression of vascular endothelial growth factor and its receptors with microvessel density in ovarian cancer

The present study aimed to investigate the correlation between the expression of vascular endothelial growth factor (VEGF) and its receptors, the Flt-1 and KDR proteins, with clinical pathology and microvessel density (MVD) in ovarian cancer tissue. The protein expression levels of VEGF and its receptors, Flt-1 and KDR/Flk-1, were detected in 48 cases of ovarian cancer using the streptavidin-biotin complex (SABC) immunohistochemical method, and tumor MVD was evaluated using F8 factor (FVIII-RA). The expression of the VEGF, Flt-1 and KDR proteins was not significantly associated with the pathological type, extent of differentiation or clinical stage of ovarian cancer. However, the co-expression of VEGF and Flt-1 was markedly correlated with differentiation and clinical stage (P<0.01). The co-expression levels of VEGF and receptor Flt-1 in malignant neoplasms with lymph node metastasis was significantly higher compared with malignant neoplasms without lymph node metastasis (P<0.05). The expression level of KDR in patients with hepatic metastasis was significantly higher compared with patients without hepatic metastasis (P<0.05). The co-expression level of VEGF and KDR in patients with hepatic metastasis was significantly higher compared with patients without hepatic metastasis (P<0.05) and the Flt-1 expression level in patients with ascites <1,000 ml was significantly lower than that in patients with ascites ≥1000 ml (P<0.05). The mean MVD of VEGF- and KDR-positive patients was significantly higher compared with VEGF- and KDR-negative patients (P<0.05). The expression of VEGF and its receptors is involved in the malignant transformation of ovarian tumors, tumor progression and metastasis, as well as ascites formation and angiogenesis.

Long-term survival outcomes of laparoscopically assisted radical hysterectomy in treating early-stage cervical cancer

OBJECTIVE

The objective of the study was to determine the long-term disease-free and overall survival outcomes of laparoscopic treatment of early-stage cervical cancer.

STUDY DESIGN

This was a longitudinal study of prospectively registered patients of cervical cancer undergoing laparoscopic surgery from June 1994 to December 2005.

RESULTS

A total of 139 patients were included, in which 60 patients were in International Federation of Gynecology and Obstetrics stage IA, 76 in IB, and 3 in IIA. Mean operation time was 231.1 +/- 6.1 minutes. Median number of pelvic lymph node retrieval was 16. Major intraoperative complications included 1 great vessel injury, 1 ureteral injury, 1 colon injury, and 6 cystotomies. In a median follow-up of 92.1 months, the mean +/- SEM cumulative disease-free and overall survival rates were 91.01% +/- 2.77% and 92.78% +/- 3.06%, respectively.

CONCLUSION

The laparoscopic approach has favorable long-term survival outcomes and perioperative morbidity. With the advantage of minimal invasiveness, laparoscopic treatment by experienced surgeons is an ideal alternative for early-stage cervical cancer.