• 中國醫(yī)科大學附屬第一醫(yī)院外科(沈陽110001);;
  • 通訊作者: 胡新華, Email: xinhuahu@126.com;

目的研究絲裂原活化蛋白激酶亞單位細胞外信號調(diào)節(jié)激酶(ERK)和p38蛋白激酶(p38 MAPK)在移植靜脈血管重塑過程中的表達。方法選Wistar大鼠80只,建立自體移植靜脈模型,術后隨機分為6 h、24 h、3 d、7 d、2周、4周、6周及8周組,于相應時點取材,半定量逆轉(zhuǎn)錄PCR法檢測移植血管中ERK和p38 MAPK的mRNA表達; Western蛋白印跡定量檢測ERK和p38 MAPK的蛋白產(chǎn)物及磷酸化蛋白產(chǎn)物表達; 脫氧核苷酸末端轉(zhuǎn)移酶末端標記法(TUNEL)檢測血管平滑肌細胞(VSMC)凋亡的變化; 免疫組化檢測增殖細胞核抗原(PCNA)的表達。 結(jié)果移植靜脈術后6 h,ERK1和p38 MAPK的mRNA表達均明顯增強,與正常靜脈組比較差異均有顯著性意義(P<0.01); ERK1 mRNA表達在移植后7 d達高峰,表達值為(33.2±14.2)%,p38 MAPK的mRNA表達于術后2周達到高峰,表達值為(58.8±26.2)%,與其余各時點比較差異有顯著性意義(P<0.01)。Western蛋白印跡提示ERK1/2在術后1~2周達高峰,6周時逐漸恢復至正常水平; 而p38 MAPK則在移植后2~4周達高峰,之后開始減少,8周時仍維持一定表達量(1/4~1/2)。ERK1與PCNA表達呈正相關(r=0.759 6,P<0.01),p38 MAPK與凋亡呈正相關(r=0.892 2,P<0.01)。結(jié)論MAPK的激活是移植靜脈內(nèi)膜增生以及血管重塑的關鍵環(huán)節(jié),可能成為防治移植靜脈狹窄、閉塞的新的治療靶點。

引用本文: 楊軍,胡新華,張強,段志泉. 細胞外信號調(diào)節(jié)激酶和p38蛋白激酶在自體移植靜脈中的表達. 中國普外基礎與臨床雜志, 2004, 11(4): 291-294. doi: 復制

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  1. 1. 馮勇,段志泉,胡海地,等. 移植靜脈平滑肌細胞凋亡及相關基因表達與增殖關系的動態(tài)研究 [J]. 中華醫(yī)學雜志, 1999; 79(1)∶ 15.
  2. 2. 胡新華,張強,孫達欣,等. 核轉(zhuǎn)錄因子κB及其抑制基因在自體移植靜脈中的表達 [J]. 中華醫(yī)學雜志, 2002; 82(22)∶1546.
  3. 3. Sambrook J, Fritsch EF, Maniatis T. 克隆化基因所表達蛋白質(zhì)的檢測與分析 [A]. 金冬雁,黎孟楓,譯. 分子克隆實驗指南 [M]. 第2版. 北京: 科學出版社, 1992∶852~898.
  4. 4. Talmor D, Applebaum A, Rudich A, et al. Activation of mitogenactivated protein kinases in human heart during cardiopulmonary bypass [J]. Circ Res, 2000; 86(9)∶1004.
  5. 5. Thury A, van Langenhove G, Carlier SG, et al. High shear stress after successful balloon angioplasty is associated with restenosis and target lesion revascularization [J]. Am Heart J, 2002; 144(1)∶136.
  6. 6. Xi XP, Graf K, Goetze S,et al. Central role of the MAPK pathway in ang IImediated DNA synthesis and migration in rat vascular smooth muscle cells [J]. Arterioscler Thromb Vasc Biol, 1999; 19(1)∶73.
  7. 7. Xu Q, Liu Y, Gorospe M, et al. Acute hypertension activates mitogenactivated protein kinases in arterial wall [J]. J Clin Invest, 1996; 97(2)∶508.
  8. 8. Ohashi N, Matsumori A, Furukawa Y, et al. Role of p38 mitogenactivated protein kinase in neointimal hyperplasia after vascular injury [J]. Arterioscler Thromb Vasc Biol, 2000; 20(12)∶2521.