Radiotherapy to the pelvis can have a major and deleterious impact on the female genital tract. Despite significant advances in the technical delivery of radical pelvic radiotherapy there remains no way to avoid deliv...Radiotherapy to the pelvis can have a major and deleterious impact on the female genital tract. Despite significant advances in the technical delivery of radical pelvic radiotherapy there remains no way to avoid delivering substantial radiation doses to the ovaries and uterus for patients undergoing treatment for gynaecological cancers. Due to improved cure rates from radical chemo-radiotherapy and social trends toward delayed childbirth many women treated for cervical cancer with radical chemo-radiotherapy will wish to attempt to preserve their fertility. Whilst there are now established and emerging techniques for preserving ovarian function and ovarian tissue, there remains the difficulty of the irradiated uterus which, even if pregnancy can be achieved, results in an increased risk for pregnancyrelated complications. Future developments may offer women in this difficult situation more and improved options for fertility preservation.展开更多
Objective:To study the effect of vascular endothelial growth factor(VEGF)and anti-VEGF on the expression of fracture healing-related factors and observe pathological changes at fractured sites. Methods:Fracture models...Objective:To study the effect of vascular endothelial growth factor(VEGF)and anti-VEGF on the expression of fracture healing-related factors and observe pathological changes at fractured sites. Methods:Fracture models were established in 105 New Zealand white rabbits and they were randomly divided into control group,VEGF group and anti-VEGF group. The relevant factors expression at fractured sites was assayed and pathological changes were observed in decalcified samples at 8,24,72 hours and 1,3,5,8 weeks after fracture. Results:After application of VGEF,the expression of BMP appeared earlier and expression time lasted longer. On the contrary,anti-VEGF completely inhibited the expression of BMP.The fractured sites were filled with fibrous callus,cartilaginous callus and bony callus at the 3rd week and woven bone was constructed at the 5th week. Fracture healing was accomplished at the 8th week in VEGF group.In anti-VEGF polyclonal antibody group, cellular necrosis increased at early period.Continuous focal necrosis was seen in the fractured sites from the 1st week to 5th week.Vascularization reduced obviously at the 3rd week. Conclusions:Fracture healing is a result of mutual regulation and coordination among many factors.VEGF may be an important factor in fracture healing.展开更多
文摘Radiotherapy to the pelvis can have a major and deleterious impact on the female genital tract. Despite significant advances in the technical delivery of radical pelvic radiotherapy there remains no way to avoid delivering substantial radiation doses to the ovaries and uterus for patients undergoing treatment for gynaecological cancers. Due to improved cure rates from radical chemo-radiotherapy and social trends toward delayed childbirth many women treated for cervical cancer with radical chemo-radiotherapy will wish to attempt to preserve their fertility. Whilst there are now established and emerging techniques for preserving ovarian function and ovarian tissue, there remains the difficulty of the irradiated uterus which, even if pregnancy can be achieved, results in an increased risk for pregnancyrelated complications. Future developments may offer women in this difficult situation more and improved options for fertility preservation.
基金Special Funds for Major State Basic Research Projects of China(G1999054204).
文摘Objective:To study the effect of vascular endothelial growth factor(VEGF)and anti-VEGF on the expression of fracture healing-related factors and observe pathological changes at fractured sites. Methods:Fracture models were established in 105 New Zealand white rabbits and they were randomly divided into control group,VEGF group and anti-VEGF group. The relevant factors expression at fractured sites was assayed and pathological changes were observed in decalcified samples at 8,24,72 hours and 1,3,5,8 weeks after fracture. Results:After application of VGEF,the expression of BMP appeared earlier and expression time lasted longer. On the contrary,anti-VEGF completely inhibited the expression of BMP.The fractured sites were filled with fibrous callus,cartilaginous callus and bony callus at the 3rd week and woven bone was constructed at the 5th week. Fracture healing was accomplished at the 8th week in VEGF group.In anti-VEGF polyclonal antibody group, cellular necrosis increased at early period.Continuous focal necrosis was seen in the fractured sites from the 1st week to 5th week.Vascularization reduced obviously at the 3rd week. Conclusions:Fracture healing is a result of mutual regulation and coordination among many factors.VEGF may be an important factor in fracture healing.
