热带医学杂志
熱帶醫學雜誌
열대의학잡지
JOURNAL OF TROPICAL MEDICINE
2007年
9期
837-841,849
,共6页
邓致刚%黄景政%辛致炜%张仁利%刘居理%傅玉才
鄧緻剛%黃景政%辛緻煒%張仁利%劉居理%傅玉纔
산치강%황경정%신치위%장인리%류거리%부옥재
阴道毛滴虫%甲硝唑%凋亡样细胞死亡
陰道毛滴蟲%甲硝唑%凋亡樣細胞死亡
음도모적충%갑초서%조망양세포사망
Trichomonas vaginalis%metronidazole%apoptotic-like cell death
目的 凋亡或程序性细胞死亡在多细胞生物体中已经被广泛研究,然而,关于单细胞寄生性原生动物细胞凋亡发生的分子机制却知之甚少.本研究旨在了解甲硝唑诱导阴道毛滴虫细胞凋亡的特征.方法 培养阴道毛滴虫并用不同浓度的甲硝唑进行处理.在不同的时间间隔进行活细胞计数.提取甲硝唑处理过的阴道毛滴虫基因组进行DNA断裂片段检测.用DNA断端末端标记(TUNEL)法测定甲硝唑处理后阴道毛滴虫核酸内切酶活性.流式细胞检测分析脂酰丝氨酸暴露情况.结果 甲硝唑可以诱导阴道毛滴虫出现凋亡样细胞死亡.这种凋亡样细胞死亡表现为细胞皱缩,磷脂酰丝氨酸暴露以及核染色体凝聚,但并未检测到寡核苷酸DNA梯带.结论 阴道毛滴虫程序性细胞死亡的调节通路不同于多细胞生物体.确定导致原生动物细胞死亡的凋亡通路也许最终可用于鉴定新的治疗靶点.
目的 凋亡或程序性細胞死亡在多細胞生物體中已經被廣汎研究,然而,關于單細胞寄生性原生動物細胞凋亡髮生的分子機製卻知之甚少.本研究旨在瞭解甲硝唑誘導陰道毛滴蟲細胞凋亡的特徵.方法 培養陰道毛滴蟲併用不同濃度的甲硝唑進行處理.在不同的時間間隔進行活細胞計數.提取甲硝唑處理過的陰道毛滴蟲基因組進行DNA斷裂片段檢測.用DNA斷耑末耑標記(TUNEL)法測定甲硝唑處理後陰道毛滴蟲覈痠內切酶活性.流式細胞檢測分析脂酰絲氨痠暴露情況.結果 甲硝唑可以誘導陰道毛滴蟲齣現凋亡樣細胞死亡.這種凋亡樣細胞死亡錶現為細胞皺縮,燐脂酰絲氨痠暴露以及覈染色體凝聚,但併未檢測到寡覈苷痠DNA梯帶.結論 陰道毛滴蟲程序性細胞死亡的調節通路不同于多細胞生物體.確定導緻原生動物細胞死亡的凋亡通路也許最終可用于鑒定新的治療靶點.
목적 조망혹정서성세포사망재다세포생물체중이경피엄범연구,연이,관우단세포기생성원생동물세포조망발생적분자궤제각지지심소.본연구지재료해갑초서유도음도모적충세포조망적특정.방법 배양음도모적충병용불동농도적갑초서진행처리.재불동적시간간격진행활세포계수.제취갑초서처리과적음도모적충기인조진행DNA단렬편단검측.용DNA단단말단표기(TUNEL)법측정갑초서처리후음도모적충핵산내절매활성.류식세포검측분석지선사안산폭로정황.결과 갑초서가이유도음도모적충출현조망양세포사망.저충조망양세포사망표현위세포추축,린지선사안산폭로이급핵염색체응취,단병미검측도과핵감산DNA제대.결론 음도모적충정서성세포사망적조절통로불동우다세포생물체.학정도치원생동물세포사망적조망통로야허최종가용우감정신적치료파점.
Objective Apoptosis or programmed cell death(PCD) has been studied extensively in multicellular organisms,however,very little is known about the molecular mechanisms by which apoptosis occurs in unicellular protozoan parasites.The aim of this study is to characterize the apoptosis or PCD of Trichomonas vaginalis induced by metronidazole (MTZ).Methods T. Vaginalis strain cultures were treated with various concentrations of MTZ and the number of viable cells were determined at different time intervals.The genomic DNA of MTZ treated T. Vaginalis was extracted and DNA fragmentation was analyzed.TUNEL assay was carried out to detect the endonuclease activity in T. Vaginalis after MTZ treatment.Flow cytometric analysis was used to analyse the phosphatidylserine (PS) exposure of T. Vaginalis.Results Metronidazole (MTZ) induced an apoptotic-like cell death in T. Vaginalis.This apoptotic-like cell death was demonstrated by cell shrinkage,phosphatidylserine exposure,and nuclear chromatin condensation.However, no oligonucleosmal DNA laddering was detected.Conclusion The regulatory pathway of apoptotic cell death in T. Vaginalis may be different from multicellular organisms.The determination of protozoan apoptotic pathways leading to cell death might ultimately allow the identification of new therapeutic targets.