目的探讨中国西北地区年轻女性乳腺癌患者(<40岁)的临床病理特征和分子分型及其关系,为临床诊治提供理论依据。方法选取2001年1月至2012年6月在西安交通大学第一附属医院新确诊为乳腺癌且年龄<40岁的214例女性乳腺癌患者,对所有...目的探讨中国西北地区年轻女性乳腺癌患者(<40岁)的临床病理特征和分子分型及其关系,为临床诊治提供理论依据。方法选取2001年1月至2012年6月在西安交通大学第一附属医院新确诊为乳腺癌且年龄<40岁的214例女性乳腺癌患者,对所有患者的临床病理特征及分子分型进行分析。结果 214例年轻女性乳腺癌患者中位年龄36岁,肿瘤直径(2.89±1.65)cm;luminal A 66例(30.84%),luminal B 77例(35.98%),Her2过表达30例(14.02%),三阴性41例(19.16%)。其中,60.75%的患者肿瘤直径>2 cm,62.15%的患者肿瘤分级为3级,75.70%的患者临床分期为Ⅱ、Ⅲ期。不同分子分型患者的肿瘤直径、临床分期、肿瘤分级及Ki67表达情况比较,差异具有统计学意义(P<0.05)。<30岁与30~<40岁患者的肿瘤分级比较,差异具有统计学意义(P<0.05)。luminal A和luminal B与Her2过表达患者的疾病无进展生存期(PFS)比较,差异具有统计学意义(P<0.05)。结论年轻乳腺癌患者的临床病理特征在分子分型方面具有差异,且分子分型影响预后,而关于年轻女性乳腺癌患者不同分子分型下肿瘤增殖情况及影响其预后的分子机制有待进一步研究。展开更多
目的对一起食物中毒分离的鸭沙门菌进行生物学特性和分子分型研究。方法菌株分离、生化鉴定和血清型确定参照GB/T4789.4-2010方法进行,用VITEK-32全自动微生物鉴定系统检测菌株药物敏感性,鲎试验检测内毒素、PCR检测沙门菌侵袭相关基因i...目的对一起食物中毒分离的鸭沙门菌进行生物学特性和分子分型研究。方法菌株分离、生化鉴定和血清型确定参照GB/T4789.4-2010方法进行,用VITEK-32全自动微生物鉴定系统检测菌株药物敏感性,鲎试验检测内毒素、PCR检测沙门菌侵袭相关基因invA和invE,用脉冲场凝胶电泳(pulsed field gel electrophoresis,PFGE)方法进行分子分型。结果 11份样品检出8株肠炎沙门菌;其中5株菌内毒素为阳性;所有菌株均携带侵袭相关基因invA和invE;该次食物中毒样品中分离得到的8株鸭沙门菌PFGE图谱完全相同,但有别于其它地区分离的鸭沙门菌。结论 PFGE可有效用于沙门菌食物中毒细菌同源性的分析。本次食物中毒有相同的鸭沙门菌克隆系来源。展开更多
Cryptococcus neoformans is an encapsulated yeast causing mainly opportunistic infections. DNA molecular typing techniques divided C. neoformans into four major molecular types (AFLP1/VNI, AFLP1A/VNB/VNII, AFLP1B/ VNII...Cryptococcus neoformans is an encapsulated yeast causing mainly opportunistic infections. DNA molecular typing techniques divided C. neoformans into four major molecular types (AFLP1/VNI, AFLP1A/VNB/VNII, AFLP1B/ VNII, AFLP3/VNIII, AFLP2/VNIV) characterized by different pathogenicity, geographical distribution and susceptibility to antifungal treatments. In this study 170 Italian C. neoformans clinical isolates (CI) and 32 environmental isolates (EI), collected and serotyped during a ten-year period (1985 to 1995), were genotyped using [GACA]4 microsatellite PCR fingerprinting. The molecular types were compared to their geographic distribution, specimen sources and patient’s risk factors. All four molecular types were described among the CI and only VNI and VNIV among the EI. VNIV molecular type was isolated with significant prevalence among the CI and VNI among the EI. A different geographical distribution of molecular types was detected: VNIV was the most prevalent in the North and Center of Italy;VNIII was isolated almost exclusively in the Center. No significant correlation among molecular types versus predisposing diseases or isolation sources was detected. The strains isolated from different body sites of the same patient (17 cases) were of the same genotype. Five out 9 cases relapsed with a different molecular type. This preliminary investigation shows a high intraspecies variability and reveals a nonhomogeneous distribution of C. neoformans molecular types in Italy.展开更多
文摘目的探讨中国西北地区年轻女性乳腺癌患者(<40岁)的临床病理特征和分子分型及其关系,为临床诊治提供理论依据。方法选取2001年1月至2012年6月在西安交通大学第一附属医院新确诊为乳腺癌且年龄<40岁的214例女性乳腺癌患者,对所有患者的临床病理特征及分子分型进行分析。结果 214例年轻女性乳腺癌患者中位年龄36岁,肿瘤直径(2.89±1.65)cm;luminal A 66例(30.84%),luminal B 77例(35.98%),Her2过表达30例(14.02%),三阴性41例(19.16%)。其中,60.75%的患者肿瘤直径>2 cm,62.15%的患者肿瘤分级为3级,75.70%的患者临床分期为Ⅱ、Ⅲ期。不同分子分型患者的肿瘤直径、临床分期、肿瘤分级及Ki67表达情况比较,差异具有统计学意义(P<0.05)。<30岁与30~<40岁患者的肿瘤分级比较,差异具有统计学意义(P<0.05)。luminal A和luminal B与Her2过表达患者的疾病无进展生存期(PFS)比较,差异具有统计学意义(P<0.05)。结论年轻乳腺癌患者的临床病理特征在分子分型方面具有差异,且分子分型影响预后,而关于年轻女性乳腺癌患者不同分子分型下肿瘤增殖情况及影响其预后的分子机制有待进一步研究。
文摘目的对一起食物中毒分离的鸭沙门菌进行生物学特性和分子分型研究。方法菌株分离、生化鉴定和血清型确定参照GB/T4789.4-2010方法进行,用VITEK-32全自动微生物鉴定系统检测菌株药物敏感性,鲎试验检测内毒素、PCR检测沙门菌侵袭相关基因invA和invE,用脉冲场凝胶电泳(pulsed field gel electrophoresis,PFGE)方法进行分子分型。结果 11份样品检出8株肠炎沙门菌;其中5株菌内毒素为阳性;所有菌株均携带侵袭相关基因invA和invE;该次食物中毒样品中分离得到的8株鸭沙门菌PFGE图谱完全相同,但有别于其它地区分离的鸭沙门菌。结论 PFGE可有效用于沙门菌食物中毒细菌同源性的分析。本次食物中毒有相同的鸭沙门菌克隆系来源。
基金supported by 2022 Special Project of Henan ProvinceChineseMedicineScientificResearch(2022ZY1048)2023 Special Project of Henan Province Chinese Medicine Scientific Research(2023YZ2043)Natural Science Foundation of Henan Province(232300421183).
文摘Cryptococcus neoformans is an encapsulated yeast causing mainly opportunistic infections. DNA molecular typing techniques divided C. neoformans into four major molecular types (AFLP1/VNI, AFLP1A/VNB/VNII, AFLP1B/ VNII, AFLP3/VNIII, AFLP2/VNIV) characterized by different pathogenicity, geographical distribution and susceptibility to antifungal treatments. In this study 170 Italian C. neoformans clinical isolates (CI) and 32 environmental isolates (EI), collected and serotyped during a ten-year period (1985 to 1995), were genotyped using [GACA]4 microsatellite PCR fingerprinting. The molecular types were compared to their geographic distribution, specimen sources and patient’s risk factors. All four molecular types were described among the CI and only VNI and VNIV among the EI. VNIV molecular type was isolated with significant prevalence among the CI and VNI among the EI. A different geographical distribution of molecular types was detected: VNIV was the most prevalent in the North and Center of Italy;VNIII was isolated almost exclusively in the Center. No significant correlation among molecular types versus predisposing diseases or isolation sources was detected. The strains isolated from different body sites of the same patient (17 cases) were of the same genotype. Five out 9 cases relapsed with a different molecular type. This preliminary investigation shows a high intraspecies variability and reveals a nonhomogeneous distribution of C. neoformans molecular types in Italy.
