Aim: To investigate the stage-specific localization of metastasis-associated protein 1 (MTA1) during spermatogenesis in adult human and mouse testis. Methods: The immunolocalization of MTA1 was studied by immunohi...Aim: To investigate the stage-specific localization of metastasis-associated protein 1 (MTA1) during spermatogenesis in adult human and mouse testis. Methods: The immunolocalization of MTA1 was studied by immunohistochemistry and Western blot analysis. The distribution pattern of MTA1 in mouse testis was confirmed by using quantitative analysis of purified spermatogenic cells. Results: The specificity of polyclonal antibody was confirmed by Western blot analysis. MTA1 was found expressed in the nucleus of germ cells, except elongate spermatids, and in the cytoplasm of Sertoli cells; Leydig cells did not show any specific reactivity. MTA1 possessed different distribution patterns in the two species: in humans, the most intensive staining was found in the nucleus of round spermatids and of primary spermatocytes while in mice, the most intense MTA 1 staining was in the nucleus of leptotene, zygotene and pachytene spermatocytes. In both species the staining exhibited a cyclic pattern. Conclusion: The present communication initially provides new evidence for the potential role of MTA1 in mature testis. In addition, its distinctive expression in germ cells suggests a regulatory role of the peptide during spermatogenesis.展开更多
目的:探讨浆液性卵巢癌中血管生成抑制蛋白-1(vasohibin-1)、结肠癌转移相关蛋白1(metastasis-associated in colon cancer-1,MACC1)和抗癌1号蛋白(KAI1)表达之间的关系及其临床意义。方法:收集124例卵巢浆液性癌(卵巢浆液性癌组)和30...目的:探讨浆液性卵巢癌中血管生成抑制蛋白-1(vasohibin-1)、结肠癌转移相关蛋白1(metastasis-associated in colon cancer-1,MACC1)和抗癌1号蛋白(KAI1)表达之间的关系及其临床意义。方法:收集124例卵巢浆液性癌(卵巢浆液性癌组)和30例卵巢浆液性囊腺瘤(卵巢浆液性囊腺瘤组)术后组织标本,采用免疫组织化学ElivisionTM法检测所有肿瘤组织中vasohibin-1,MACC1和KAI1蛋白的表达情况。结果:卵巢浆液性癌组vasohibin-1和MACC1蛋白的阳性表达率分别为48.4%和58.1%,均高于卵巢浆液性囊腺瘤组(分别为10.0%和13.3%);而卵巢浆液性癌组KAI1蛋白阳性表达率为33.9%,低于浆液性囊腺瘤组(86.7%),差异均有统计学意义(均P<0.05);3种蛋白的表达与浆液性卵巢癌的病理组织学分级、国际妇产科联盟(Federation International of Gynecology and Obstetrics,FIGO)分期以及盆腔淋巴结转移有关(均P<0.05);KAI1蛋白的表达与vasohibin-1和MACC1的表达呈负相关(r值分别为–0.500和–0.600,均P<0.01),同时,vasohibin-1与MACC1蛋白的表达呈正相关(r=0.518,P<0.01)。Kaplan-Meier生存分析表明:vasohibin-1和MACC1的过表达以及KAI1的低表达均与患者的生存率有关,vasohibin-1和MACC1表达阳性及KAI1表达阴性的患者生存率明显低于vasohibin-1和MACC1表达阴性及KAI1表达阳性的患者(均P<0.05)。多因素分析表明:FIGO分期、vasohibin-1和KAI1蛋白的表达是影响浆液性卵巢癌根治术后患者预后的独立因素(RR值分别为2.185,3.893,0.413;95% CI分别为1.263~3.779,2.190~6.921,0.251~0.681;均P<0.05)。结论:浆液性卵巢癌组织中vasohibin-1和MACC1的表达上调以及KAI1的表达下调与肿瘤的分化程度、临床分期、转移和预后等因素相关,这些指标的联合检测可作为判断浆液性卵巢癌患者肿瘤演进及生存预后的重要指标。展开更多
目的观察敲降长链非编码RNA-肺腺癌转移相关转录因子1(lncRNA-MALAT1)调控微小RNA-194-5p(miR-194-5p)/叉头框蛋白A1(FOXA1)通路对脂多糖(LPS)诱导的人肺泡上皮细胞(HPAEpiC)凋亡的影响.方法采用1 mg/L LPS处理HPAEpiC复制脓毒症急性肺...目的观察敲降长链非编码RNA-肺腺癌转移相关转录因子1(lncRNA-MALAT1)调控微小RNA-194-5p(miR-194-5p)/叉头框蛋白A1(FOXA1)通路对脂多糖(LPS)诱导的人肺泡上皮细胞(HPAEpiC)凋亡的影响.方法采用1 mg/L LPS处理HPAEpiC复制脓毒症急性肺损伤(ALI)体外模型.采用荧光定量聚合酶链反应(qPCR)检测HPAEpiC细胞中MALAT1、miR-194-5p的表达水平,构建MALAT1敲降载体、miR-194-5p抑制剂及FOXA1抑制剂转染HPAEpiC,将细胞分为空白对照组、LPS模型组、LPS+生理盐水组、LPS+MALAT1抑制剂组、LPS+MALAT1抑制剂+生理盐水组、LPS+MALAT1抑制剂+miR-194-5p抑制剂组和LPS+FOXA1抑制剂组.采用CCK-8细胞增殖及毒性检测试剂盒、流式细胞术、蛋白质免疫印迹试验(Western Blot)检测MALAT1或其敲降后对LPS诱导的HPAEpiC增殖及凋亡和FOXA1表达的影响;采用双荧光素酶报告基因检测lncRNA-MALAT1、miR-194-5p及FOXA1的靶向调控关系.结果与空白对照组比较,LPS可上调HPAEpiC-MALAT1的表达,促进HPAEpiC凋亡并抑制其增殖〔MALAT1(2^(-ΔΔCt)):0.83±0.09比0.15±0.02,HPAEpiC凋亡率:(21.31±2.31)%比(5.41±0.42)%,24 h HPAEpiC增殖活性(A值):0.42±0.03比0.54±0.02,均P<0.05〕;与LPS+生理盐水组比较,敲降MALAT1可抑制LPS诱导的HPAEpiC凋亡并促进其增殖〔细胞凋亡率:(6.40±0.40)%比(21.38±2.31)%,24 h HPAEpiC增殖活性(A值):0.53±0.03比0.40±0.02,均P<0.05〕,降低MALAT1的表达(2-ΔΔCt:0.20±0.03比1.02±0.09,P<0.05).双荧光素酶报告基因及Western Blot证实,敲降MALAT1通过靶向上调miR-194-5p从而抑制FOXA1在LPS诱导的HPAEpiC中的表达〔miR-194-5p(2^(-ΔΔCt)):5.27±0.15比1.21±0.09,FOXA1蛋白表达(灰度值):0.36±0.05比1.00±0.07,均P<0.05〕,miR-194-5p抑制剂能逆转MALAT1敲降在LPS诱导的HPAEpiC中对FOXA1的作用〔FOXA1蛋白表达(灰度值):2.76±0.20比1.00±0.07,P<0.05〕,抑制FOXA1表达能减轻LPS诱导的HPAEpiC凋亡并促进其增殖〔FOXA1蛋白表达(灰度值):0.28±0.03比1.00±0.03,HPAEpiC凋亡率:(6.78±0.38)%比(19.21±0.70)%,24 h HPAEpiC增殖活性(A值):0.59±0.20比0.41±0.02,均P<0.05〕.结论敲降MALAT1通过靶向上调miR-194-5p抑制FOXA1的表达,进而抑制LPS诱导的HPAEpiC凋亡,为脓毒症ALI的诊断和治疗提供了潜在的分子靶点.展开更多
基金We are grateful to Prof. Rui-An Wang (Department of Molecular and Cellular 0ncology, the University of Texas MD Anderson Cancer Center, Houston, TX, USA) for his helpful advice and discussion regarding the pos- sible functions of MTA1. We also thank Miss Hui Wang for her careful assistance in English. This study was supported by the Natural Science Foundation of China (2006: No. 30570982 2003: No. 30370750 2003: No. 30371584).
文摘Aim: To investigate the stage-specific localization of metastasis-associated protein 1 (MTA1) during spermatogenesis in adult human and mouse testis. Methods: The immunolocalization of MTA1 was studied by immunohistochemistry and Western blot analysis. The distribution pattern of MTA1 in mouse testis was confirmed by using quantitative analysis of purified spermatogenic cells. Results: The specificity of polyclonal antibody was confirmed by Western blot analysis. MTA1 was found expressed in the nucleus of germ cells, except elongate spermatids, and in the cytoplasm of Sertoli cells; Leydig cells did not show any specific reactivity. MTA1 possessed different distribution patterns in the two species: in humans, the most intensive staining was found in the nucleus of round spermatids and of primary spermatocytes while in mice, the most intense MTA 1 staining was in the nucleus of leptotene, zygotene and pachytene spermatocytes. In both species the staining exhibited a cyclic pattern. Conclusion: The present communication initially provides new evidence for the potential role of MTA1 in mature testis. In addition, its distinctive expression in germ cells suggests a regulatory role of the peptide during spermatogenesis.
文摘目的:探讨浆液性卵巢癌中血管生成抑制蛋白-1(vasohibin-1)、结肠癌转移相关蛋白1(metastasis-associated in colon cancer-1,MACC1)和抗癌1号蛋白(KAI1)表达之间的关系及其临床意义。方法:收集124例卵巢浆液性癌(卵巢浆液性癌组)和30例卵巢浆液性囊腺瘤(卵巢浆液性囊腺瘤组)术后组织标本,采用免疫组织化学ElivisionTM法检测所有肿瘤组织中vasohibin-1,MACC1和KAI1蛋白的表达情况。结果:卵巢浆液性癌组vasohibin-1和MACC1蛋白的阳性表达率分别为48.4%和58.1%,均高于卵巢浆液性囊腺瘤组(分别为10.0%和13.3%);而卵巢浆液性癌组KAI1蛋白阳性表达率为33.9%,低于浆液性囊腺瘤组(86.7%),差异均有统计学意义(均P<0.05);3种蛋白的表达与浆液性卵巢癌的病理组织学分级、国际妇产科联盟(Federation International of Gynecology and Obstetrics,FIGO)分期以及盆腔淋巴结转移有关(均P<0.05);KAI1蛋白的表达与vasohibin-1和MACC1的表达呈负相关(r值分别为–0.500和–0.600,均P<0.01),同时,vasohibin-1与MACC1蛋白的表达呈正相关(r=0.518,P<0.01)。Kaplan-Meier生存分析表明:vasohibin-1和MACC1的过表达以及KAI1的低表达均与患者的生存率有关,vasohibin-1和MACC1表达阳性及KAI1表达阴性的患者生存率明显低于vasohibin-1和MACC1表达阴性及KAI1表达阳性的患者(均P<0.05)。多因素分析表明:FIGO分期、vasohibin-1和KAI1蛋白的表达是影响浆液性卵巢癌根治术后患者预后的独立因素(RR值分别为2.185,3.893,0.413;95% CI分别为1.263~3.779,2.190~6.921,0.251~0.681;均P<0.05)。结论:浆液性卵巢癌组织中vasohibin-1和MACC1的表达上调以及KAI1的表达下调与肿瘤的分化程度、临床分期、转移和预后等因素相关,这些指标的联合检测可作为判断浆液性卵巢癌患者肿瘤演进及生存预后的重要指标。
文摘目的观察敲降长链非编码RNA-肺腺癌转移相关转录因子1(lncRNA-MALAT1)调控微小RNA-194-5p(miR-194-5p)/叉头框蛋白A1(FOXA1)通路对脂多糖(LPS)诱导的人肺泡上皮细胞(HPAEpiC)凋亡的影响.方法采用1 mg/L LPS处理HPAEpiC复制脓毒症急性肺损伤(ALI)体外模型.采用荧光定量聚合酶链反应(qPCR)检测HPAEpiC细胞中MALAT1、miR-194-5p的表达水平,构建MALAT1敲降载体、miR-194-5p抑制剂及FOXA1抑制剂转染HPAEpiC,将细胞分为空白对照组、LPS模型组、LPS+生理盐水组、LPS+MALAT1抑制剂组、LPS+MALAT1抑制剂+生理盐水组、LPS+MALAT1抑制剂+miR-194-5p抑制剂组和LPS+FOXA1抑制剂组.采用CCK-8细胞增殖及毒性检测试剂盒、流式细胞术、蛋白质免疫印迹试验(Western Blot)检测MALAT1或其敲降后对LPS诱导的HPAEpiC增殖及凋亡和FOXA1表达的影响;采用双荧光素酶报告基因检测lncRNA-MALAT1、miR-194-5p及FOXA1的靶向调控关系.结果与空白对照组比较,LPS可上调HPAEpiC-MALAT1的表达,促进HPAEpiC凋亡并抑制其增殖〔MALAT1(2^(-ΔΔCt)):0.83±0.09比0.15±0.02,HPAEpiC凋亡率:(21.31±2.31)%比(5.41±0.42)%,24 h HPAEpiC增殖活性(A值):0.42±0.03比0.54±0.02,均P<0.05〕;与LPS+生理盐水组比较,敲降MALAT1可抑制LPS诱导的HPAEpiC凋亡并促进其增殖〔细胞凋亡率:(6.40±0.40)%比(21.38±2.31)%,24 h HPAEpiC增殖活性(A值):0.53±0.03比0.40±0.02,均P<0.05〕,降低MALAT1的表达(2-ΔΔCt:0.20±0.03比1.02±0.09,P<0.05).双荧光素酶报告基因及Western Blot证实,敲降MALAT1通过靶向上调miR-194-5p从而抑制FOXA1在LPS诱导的HPAEpiC中的表达〔miR-194-5p(2^(-ΔΔCt)):5.27±0.15比1.21±0.09,FOXA1蛋白表达(灰度值):0.36±0.05比1.00±0.07,均P<0.05〕,miR-194-5p抑制剂能逆转MALAT1敲降在LPS诱导的HPAEpiC中对FOXA1的作用〔FOXA1蛋白表达(灰度值):2.76±0.20比1.00±0.07,P<0.05〕,抑制FOXA1表达能减轻LPS诱导的HPAEpiC凋亡并促进其增殖〔FOXA1蛋白表达(灰度值):0.28±0.03比1.00±0.03,HPAEpiC凋亡率:(6.78±0.38)%比(19.21±0.70)%,24 h HPAEpiC增殖活性(A值):0.59±0.20比0.41±0.02,均P<0.05〕.结论敲降MALAT1通过靶向上调miR-194-5p抑制FOXA1的表达,进而抑制LPS诱导的HPAEpiC凋亡,为脓毒症ALI的诊断和治疗提供了潜在的分子靶点.