中國醫藥大學機構典藏 China Medical University Repository, Taiwan:Item 310903500/24259
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    題名: 中藥蘇木對VEGF誘發人類臍靜脈內皮細胞增生與移行之抑制作用;The Inhibition Effect of Caesalpinia sappan L. on VEGF-induced Proliferation and Migration in human umbilical vein endothelial cells
    作者: 魏佑吉;Yu-Chi Wei
    貢獻者: 中國醫藥大學中西醫結合研究所
    關鍵詞: 蘇木;人類臍靜脈血管內皮細胞;血管新生;內皮細胞生長因子;Sappan lignum;human umbilical vein endothelial cells;vascular endothelial growth factor;HUVEC;VEGF;angiogenesis
    日期: 1993
    上傳時間: 2009-12-21 11:17:04 (UTC+8)
    摘要: 癌症是一種血管新生依賴型(angiogenesis-dependent)的疾病,而血管新生是受到正向及負向因子調控所形成的多階段進程,近年來抗血管新生(anti-angiogenesis)已被認為是一種可行的抗癌策略。蘇木(Sappan lignum)是屬於豆科植物的木質部,自古即用為活血和破血的要藥。而其對癌症的研究都侷限癌細胞的毒殺作用,卻未發現有血管新生抑制作用的研究或論述。於此論文中,我們探討蘇木可能的抗血管新生作用,以期未來可以用於癌症的治療。 我們以內皮細胞生長因子(vascular endothelial growth factor, VEGF)誘發人類臍靜脈血管內皮細胞(human umbilical vein endothelial cells, HUVEC)的增生(proliferation),同時添加不同濃度的蘇木水萃取液,以觀察其對HUVEC增生的影響;同時進一步觀察蘇木對VEGF誘發HUVEC細胞移行(cell migration)的影響。結果發現VEGF具有誘發HUVEC增生的作用,且呈現劑量反應關係;蘇木的濃度在25~100μg/ml時,可顯著抑制20 ng/ml VEGF誘發的增生作用,幾乎可完全抵消VEGF所引起的增生作用;這和目前許多化學治療藥物利用低於其治療劑量所產生的細胞停滯作用(cytostatic effect),而應用於血管新生抑制劑有相似的意義。而當蘇木的濃度若超過100μg/ml,即會產生明顯的細胞毒殺效果。進一步利用Transwell的細胞移行實驗來分析蘇木對VEGF誘發細胞移動的影響,結果顯示蘇木的濃度於25~100μg/ml時,可明顯抑制20 ng/ml VEGF所引起的細胞移動現象,且具有劑量反應關係。綜合以上結果,蘇木的確在體外具有抑制VEGF所引起的血管內皮細胞增生及移行作用,故蘇木可能成為另一個具發展潛力之抗血管新生作用的中藥,其可能作用機轉與實驗動物上的療效有待進一步確認。; Cancer is one of angiogenesis-dependent diseases that involve multiple processes of positive and negative regulations in angiogenesis. Recently, anti-angiogenesis has been regarded as a promising strategy for cancer treatment. The wood of Sappan lignum is one of the Chinese Medicines with blood-activating and stasis-eliminating effects. In this study, the effects of Sappan lignum in anti-angiogenesis were examined in human umbilical vein endothelial cells (HUVEC). Our data showed that Vascular endothelial growth factor (VEGF) induced the proliferation of HUVEC in a dose dependent manner. Sappan lignum (25~100μg/ml) significantly inhibited the proliferation of HUVEC induced by VEGF (20 ng/ml). At the concentrations of 25~50 μg/ml, Sappan lignum almost completely blocked VEGF-induced cell proliferation. However, Sappan lignum exhibited overt cytotoxicity at higher doses (> 100 μg/ml). This effect of Sappan lignum is similar to low dose chemotherapeutic agents that pose cytostatic effect and were used as anti-angiogenesis agents. Furthermore, we found that Sappan lignum markedly reduced VEGF (20 ng/ml)-induced migration of HUVEC in a Transwell migration assay. In conclusion, our data suggest that Sappan lignum can markedly inhibit the proliferation and migration-induced by VEGF in HUVEC. Sappan lignum may be an effective herbal drug in anti-angiogenesis. Further investigation is needed to explore its potential use in animal and clinical studies.
    顯示於類別:[中西醫結合研究所] 博碩士論文

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