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The relationship between platelet-derived growth factor expression and angiogenesis/lymphangiogenesis

Guocheng LIU MD, Shouhua YANG MD, Zehua WANG MD,

《医学前沿（英文）》 2009年第3卷第4期页码 447-451 doi: 10.1007/s11684-009-0082-x

摘要： This paper is aimed to examine if changes in platelet-derived growth factor (PDGF) expression at different stages of cervical cancer are related to the variation in blood vessel density (BVD) and lymphatic vessel density (LVD) to evaluate the relationship between PDGF expression and stages and metastasis of cervical cancer. Polymerase chain reaction (PCR) and RT-PCR were used to detect the expression levels of PDGF in 45 cervical cancer tissue samples (the experimental group). The samples were immunohistochemically stained with monoclonal antibodies D2-40 and CD34, and BVD and LVD were measured. The expressions of PDGF-A, -B, and- D were all higher in the experimental group than in the control group (<0.05); no significant difference was found in the expression of PDGF-C between the experimental group and the control group (>0.05). PDGF-A and -B expression was positively related with BVD and LVD (<0.01, R= 0.49, 0.527, 0.327, 0.68). The expression levels of PDGF-C and -D were not significantly related with BVD and LVD. At the early stage of cervical cancer, BVD and LVD were significantly higher than in the controls (<0.01). The BVD and LVD in tissues in the surrounding areas of cervical cancer were significantly higher than in tissues at cancer center, and LVD was related to lymph node metastasis (<0.001). BVD and LVD were not associated with the differentiation and pathological stages of cervical cancer. The expressions of PDGF-A, -B, and -D in cervical cancer were closely related with the clinical stages of cervical cancer. PDGF-A and -B were intimately associated with the lymph node metastasis and prognosis of cervical cancer.

关键词： cervical cancer lymphatic vessel density blood vessel density platelet-derived growth factor

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Endostatin specifically targets both tumor blood vessels and lymphatic vessels

Wei Zhuo, Yang Chen, Xiaomin Song, Yongzhang Luo

《医学前沿（英文）》 2011年第5卷第4期页码 336-340 doi: 10.1007/s11684-011-0163-5

摘要： Endostatin, a 20 kDa C-terminal fragment of collagen XVIII, was first identified as a potent angiogenic inhibitor. The anti-angiogenic function of endostatin has been well documented during the past decade. Recently, several studies demonstrated that endostatin also inhibits tumor lymphangiogenesis and lymphatic metastasis. However, the exact mechanism that endostatin executes its anti-angiogenic and anti-lymphangiogenic functions remains elusive. In the current mini-review, we briefly summarize recent novel findings, including the functions of endostatin targeting not only angiogenesis but also lymphangiogenesis, and the underlying mechanism by which endostatin internalization regulates its biological functions.

关键词： endostatin angiogenesis lymphangiogenesis nystatin internalization tumor