目的:探讨胃肠道间质瘤相关基因突变体KIT Ins IPYD579和PDGFRA L839P对格列卫治疗的药物敏感性。方法:采用脂质体法将胃肠道间质瘤相关基因突变体KIT De1559-560、KIT Ins IPYD579、PDGFRA D842V及PDGFRA L839P重组质粒分别瞬时转染中...目的:探讨胃肠道间质瘤相关基因突变体KIT Ins IPYD579和PDGFRA L839P对格列卫治疗的药物敏感性。方法:采用脂质体法将胃肠道间质瘤相关基因突变体KIT De1559-560、KIT Ins IPYD579、PDGFRA D842V及PDGFRA L839P重组质粒分别瞬时转染中国仓鼠卵巢上皮细胞系(CHO),表达24h后与格列卫共孵育90min,用Western-blot法检测的相关蛋白表达及其磷酸化状态。另外,用MTT法检测各组稳转PDGFRA基因突变体的CHO细胞与不同浓度格列卫共孵育72h后的增殖变化。结果:当格列卫浓度为0.1μM时,转染KIT De1559-560重组质粒的CHO细胞磷酸化KIT蛋白表达量明显降低。当格列卫浓度为1μM时,转染KIT Ins IPYD579和PDGFRA L839P重组质粒的CHO细胞的相应蛋白磷酸化形式不能检出。而转染PDGFRA D842V重组质粒的CHO细胞直至格列卫浓度提高至5μM时,其磷酸化PDGFRA蛋白表达水平仍无明显降低。MTT法显示:当格列卫浓度提高至1μM时,转染PDGFRA L839P重组质粒的CHO细胞增殖百分比明显降低,而转染PDGFRA D842V重组质粒的CHO细胞增殖百分比直至格列卫浓度为5μM时仍无明显变化。结论:格列卫在短时间内可使PDGFRA L839P或KIT Ins IPYD579突变体磷酸化蛋白表达减少,长期作用时对表达PDGFRA L839P突变体的细胞增殖具有明显的抑制作用。展开更多
A 44-year-old man, who was diagnosed with a gastrointestinal stromal tumor incidentally during emergency laparotomy for treatment of acute obstruction of small intestine at another hospital in 1999, was referred to ou...A 44-year-old man, who was diagnosed with a gastrointestinal stromal tumor incidentally during emergency laparotomy for treatment of acute obstruction of small intestine at another hospital in 1999, was referred to our hospital due to a solitary metastasis in the liver in November 2002. A right segmentectomy (Segment 6, Couinaud's system) of liver was carried out. Half and one years later, a recurrent metastasis with involvement of the inferior vena cava was detected in posterior region of the liver. He underwent the third surgery in May 2004. Three another small metastases in greater omentum were found and removed. The tumor in posterior sector of the liver was en bloc resected with portion of involved inferior vena cava and diaphragm. The resected vena cava is repaired primarily through a lateral venorraphy.However, local recurrence was detected one year later, he recieved the fourth surgery in July 2005. He is now in Gleevec therapy. At present, he is in good health and free of recurrence.展开更多
文摘目的:探讨胃肠道间质瘤相关基因突变体KIT Ins IPYD579和PDGFRA L839P对格列卫治疗的药物敏感性。方法:采用脂质体法将胃肠道间质瘤相关基因突变体KIT De1559-560、KIT Ins IPYD579、PDGFRA D842V及PDGFRA L839P重组质粒分别瞬时转染中国仓鼠卵巢上皮细胞系(CHO),表达24h后与格列卫共孵育90min,用Western-blot法检测的相关蛋白表达及其磷酸化状态。另外,用MTT法检测各组稳转PDGFRA基因突变体的CHO细胞与不同浓度格列卫共孵育72h后的增殖变化。结果:当格列卫浓度为0.1μM时,转染KIT De1559-560重组质粒的CHO细胞磷酸化KIT蛋白表达量明显降低。当格列卫浓度为1μM时,转染KIT Ins IPYD579和PDGFRA L839P重组质粒的CHO细胞的相应蛋白磷酸化形式不能检出。而转染PDGFRA D842V重组质粒的CHO细胞直至格列卫浓度提高至5μM时,其磷酸化PDGFRA蛋白表达水平仍无明显降低。MTT法显示:当格列卫浓度提高至1μM时,转染PDGFRA L839P重组质粒的CHO细胞增殖百分比明显降低,而转染PDGFRA D842V重组质粒的CHO细胞增殖百分比直至格列卫浓度为5μM时仍无明显变化。结论:格列卫在短时间内可使PDGFRA L839P或KIT Ins IPYD579突变体磷酸化蛋白表达减少,长期作用时对表达PDGFRA L839P突变体的细胞增殖具有明显的抑制作用。
文摘A 44-year-old man, who was diagnosed with a gastrointestinal stromal tumor incidentally during emergency laparotomy for treatment of acute obstruction of small intestine at another hospital in 1999, was referred to our hospital due to a solitary metastasis in the liver in November 2002. A right segmentectomy (Segment 6, Couinaud's system) of liver was carried out. Half and one years later, a recurrent metastasis with involvement of the inferior vena cava was detected in posterior region of the liver. He underwent the third surgery in May 2004. Three another small metastases in greater omentum were found and removed. The tumor in posterior sector of the liver was en bloc resected with portion of involved inferior vena cava and diaphragm. The resected vena cava is repaired primarily through a lateral venorraphy.However, local recurrence was detected one year later, he recieved the fourth surgery in July 2005. He is now in Gleevec therapy. At present, he is in good health and free of recurrence.
