目的研究肿瘤干细胞标记物CD133、CD44、SOX2、OCT4、ALDH1在非小细胞肺癌(NSCLC)组织中的表达及临床意义,为探索非小细胞肺癌肿瘤干细胞提供参考。方法采用免疫组织化学方法检测70例NSCLC组织、14例非癌组织中的CD133、CD44、SOX2、OCT...目的研究肿瘤干细胞标记物CD133、CD44、SOX2、OCT4、ALDH1在非小细胞肺癌(NSCLC)组织中的表达及临床意义,为探索非小细胞肺癌肿瘤干细胞提供参考。方法采用免疫组织化学方法检测70例NSCLC组织、14例非癌组织中的CD133、CD44、SOX2、OCT4、ALDH1蛋白的表达并对结果进行分析。结果 (1)CD133、CD44、SOX2、OCT4、ALDH1在70例NSCLC组织中的阳性表达率分别为88.57%、98.57%、100%、100%、100%,强阳性表达率分别为48.57%、67.14%、67.14%、31.43%、50%;CD133、C C D 4 4在N S C L C与非癌组织中的表达差异存在统计学意义(P均<0.0001),SOX2、OCT4、ALDH1在NSCLC与非癌组织中的表达差异无统计学意义(P均>0.05)。(2)随着病理级别的升高,CD133、CD44、SOX2、OCT4及ALDH1的表达呈上升趋势,分化越低的NSCLC表达上述指标的概率越高,其中CD133、SOX2、OCT4的表达在高、中、低分化组织中差异存在统计学意义(P值分别为0.001、0.040、<0.0001);CD133的表达在吸烟史、分化程度、淋巴结转移、肿瘤分期四个因素上差异存在统计学意义(P值分别为0.033、0.001、0.033、0.046);CD44与SOX2的表达在年龄上的差异存在统计学意义(P值分别为0.001、0.040)。结论 NSCLC组织中CD133、CD44、SOX2、OCT4、ALDH1阳性率高,CD133、CD44的表达明显高于非癌组织;CD133、SOX2、OCT4与NSCLC的恶性程度有关;CD44与SOX2与年龄因素有关。展开更多
目的探讨乳腺癌中乙醛脱氢酶1(aldehyde dehydrogenase class 1,ALDH1)的表达及其与细胞凋亡、caspase-3的关系。方法应用免疫组化SP法检测ALDH1和caspase-3在67例浸润性乳腺导管癌组织中的表达,应用TUNEL法检测组织中的细胞凋亡。结果 ...目的探讨乳腺癌中乙醛脱氢酶1(aldehyde dehydrogenase class 1,ALDH1)的表达及其与细胞凋亡、caspase-3的关系。方法应用免疫组化SP法检测ALDH1和caspase-3在67例浸润性乳腺导管癌组织中的表达,应用TUNEL法检测组织中的细胞凋亡。结果 (1)乳腺癌组织中ALDH1阳性率为68.7%,与年龄负相关,与肿瘤直径、TNM分期正相关。caspase-3阳性率为62.7%,与组织学分级、TNM分期和ER正相关。(2)ALDH1阴性组凋亡指数(AI)=(3.45±2.77)%,高于ALDH1阳性组(1.78±1.74)%;乳腺癌中caspase-3阴性组AI=(1.58±1.51)%低于阳性组(2.74±2.49)%;ALDH1与caspase-3表达无关。结论 ALDH1参与细胞凋亡的作用机制可能与caspase-3无关,ALDH1蛋白在癌组织异常表达可能为临床治疗提供潜在的靶点。展开更多
目的探讨乙醛脱氢酶1（Mdehyde—dehydrogenase Class 1，ALDH1）在结肠癌组织中的表达情况及临床意义。方法应用免疫组织化学SP法对76例术前未行放、化疗的结肠癌标本及正常结肠黏膜组织进行ALDH1检测，并结合肿瘤临床病理特征、预后...目的探讨乙醛脱氢酶1（Mdehyde—dehydrogenase Class 1，ALDH1）在结肠癌组织中的表达情况及临床意义。方法应用免疫组织化学SP法对76例术前未行放、化疗的结肠癌标本及正常结肠黏膜组织进行ALDH1检测，并结合肿瘤临床病理特征、预后进行分析。结果根据Q评分（quickscore），肿瘤组织ALDH1的表达范围由0～240不等，按Q〉120为高表达的标准，高表达率为34．2％（26／76）。正常结肠组织不表达或低表达ALDH1。ALDH1的表达与结肠癌患者年龄、性别、血型、血CEA水平、淋巴结转移、分化程度、浸润深度、Duke’s分期均无明显相关。ALDH1高表达组结肠癌患者的5年生存率明显低于低表达组（30％比69％，P=0．040）。结论ALDH1在结肠癌组织中有一定高表达率，其高表达提示预后不良，可作为评价结肠癌预后指标。展开更多
Objective: Vasculogenic mimicry(VM) channels that are lined by tumor cells are a functional blood supply in malignant tumors.However, the role of VM-initiating cells remains poorly understood. Cancer stem-like cells(C...Objective: Vasculogenic mimicry(VM) channels that are lined by tumor cells are a functional blood supply in malignant tumors.However, the role of VM-initiating cells remains poorly understood. Cancer stem-like cells(CSCs) are positively correlated with VM. In this study, triple-negative breast cancer(TNBC) enriched with CSCs was used to investigate the relationship between VM and CSCs.Methods: The expression of several CSC markers was detected by immunohistochemistry in 100 human breast cancer samples.The clinical significance of CSC markers and the relationship between VM, CSCs, breast cancer subtypes, and VM-associated proteins were analyzed. CD133+ and ALDH+ human and mouse TNBC cells were isolated by FACS to examine the ability of VM formation and the spatial relationship between VM and CSCs.Results: CSCs were associated with TNBC subtype and VM in human invasive breast cancer. CSCs in TNBC MDA-MB-231 cells formed more VM channels and expressed more molecules promoting VM than the non-TNBC MCF-7 cells in vitro. MDA-MB-231 cells that encircled VM channels on Matrigel expressed CD133. Moreover, CSCs were located near VM channels in the 3D reconstructed blood supply system in human TNBC grafts. The CD133+ and ALDH+ cells isolated from TA2 mouse breast cancer formed more VM channels in vivo.Conclusions: CSCs line VM channels directly. Additionally, CSCs provide more VM-related molecules to synergize VM formation. The signaling pathways that control CSC differentiation may also be potential treatment targets for TNBC.展开更多
AIM: To demonstrated the combined effects of aging and carcinogen treatment on cancer stem/stem-like cells(CSCs) of gastric mucosa in an animal model. METHODS: In this study we investigated the effects of aging and He...AIM: To demonstrated the combined effects of aging and carcinogen treatment on cancer stem/stem-like cells(CSCs) of gastric mucosa in an animal model. METHODS: In this study we investigated the effects of aging and Helicobacter pylori(H. pylori) inflammation as a model for inflammation induced carcinogenesis in human and rat gastric mucosa samples. In aging studies, we compared 4-mo old(young) with 22 mo(aged) old Fischer-344 rats. For human studies, gastric biop-sies and resection specimens representing normal mucosa or different stages of H. pylori gastritis and gastric adenocarcinomas were used for determining the expression of stem cell markers CD166, ALDH1 and LGR5. In addition we performed immunofluorescent double labeling for B-catenin and Lgr5 in both rat and human gastric tissues to examine the status of Wnt signaling in these cells. RESULTS: CSC markers ALDH1, LGR5, and CD166 were expressed in very low levels in normal human gastric mucosa or young rat gastric mucosa. In contrast, level of expression for all three markers significantly increased in H. pylori gastritis and gastric adenocarcinomas as well as in normal gastric mucosa in aged rats. We also observed cytoplasmic B-catenin staining in both aged rat and human H. pylori inflamed gastric mucosa, which were found to be colocalized with Lgr5 immunoreactive cells. The increased number of ALDH1, CD166 and LGR5 positive cells in H. pylori gastritis indicates that increased number of stem-like cells in gastric mucosa is an early event, and may constitute an important step in the progression to neoplasia. CONCLUSION: Our observation of the age-related increase in cancer stem/stem-like cells in the gastric mucosa may explain the increased incidence of gastric cancer during aging. Combination of aging and H. pylori infection may have additive effects in progression to neoplasia.展开更多
文摘目的研究肿瘤干细胞标记物CD133、CD44、SOX2、OCT4、ALDH1在非小细胞肺癌(NSCLC)组织中的表达及临床意义,为探索非小细胞肺癌肿瘤干细胞提供参考。方法采用免疫组织化学方法检测70例NSCLC组织、14例非癌组织中的CD133、CD44、SOX2、OCT4、ALDH1蛋白的表达并对结果进行分析。结果 (1)CD133、CD44、SOX2、OCT4、ALDH1在70例NSCLC组织中的阳性表达率分别为88.57%、98.57%、100%、100%、100%,强阳性表达率分别为48.57%、67.14%、67.14%、31.43%、50%;CD133、C C D 4 4在N S C L C与非癌组织中的表达差异存在统计学意义(P均<0.0001),SOX2、OCT4、ALDH1在NSCLC与非癌组织中的表达差异无统计学意义(P均>0.05)。(2)随着病理级别的升高,CD133、CD44、SOX2、OCT4及ALDH1的表达呈上升趋势,分化越低的NSCLC表达上述指标的概率越高,其中CD133、SOX2、OCT4的表达在高、中、低分化组织中差异存在统计学意义(P值分别为0.001、0.040、<0.0001);CD133的表达在吸烟史、分化程度、淋巴结转移、肿瘤分期四个因素上差异存在统计学意义(P值分别为0.033、0.001、0.033、0.046);CD44与SOX2的表达在年龄上的差异存在统计学意义(P值分别为0.001、0.040)。结论 NSCLC组织中CD133、CD44、SOX2、OCT4、ALDH1阳性率高,CD133、CD44的表达明显高于非癌组织;CD133、SOX2、OCT4与NSCLC的恶性程度有关;CD44与SOX2与年龄因素有关。
文摘目的探讨乙醛脱氢酶1（Mdehyde—dehydrogenase Class 1，ALDH1）在结肠癌组织中的表达情况及临床意义。方法应用免疫组织化学SP法对76例术前未行放、化疗的结肠癌标本及正常结肠黏膜组织进行ALDH1检测，并结合肿瘤临床病理特征、预后进行分析。结果根据Q评分（quickscore），肿瘤组织ALDH1的表达范围由0～240不等，按Q〉120为高表达的标准，高表达率为34．2％（26／76）。正常结肠组织不表达或低表达ALDH1。ALDH1的表达与结肠癌患者年龄、性别、血型、血CEA水平、淋巴结转移、分化程度、浸润深度、Duke’s分期均无明显相关。ALDH1高表达组结肠癌患者的5年生存率明显低于低表达组（30％比69％，P=0．040）。结论ALDH1在结肠癌组织中有一定高表达率，其高表达提示预后不良，可作为评价结肠癌预后指标。
基金supported by the Student’s Platform for Innovation and Entrepreneurship Training Program, China (Grant No. 201510062001)
文摘Objective: Vasculogenic mimicry(VM) channels that are lined by tumor cells are a functional blood supply in malignant tumors.However, the role of VM-initiating cells remains poorly understood. Cancer stem-like cells(CSCs) are positively correlated with VM. In this study, triple-negative breast cancer(TNBC) enriched with CSCs was used to investigate the relationship between VM and CSCs.Methods: The expression of several CSC markers was detected by immunohistochemistry in 100 human breast cancer samples.The clinical significance of CSC markers and the relationship between VM, CSCs, breast cancer subtypes, and VM-associated proteins were analyzed. CD133+ and ALDH+ human and mouse TNBC cells were isolated by FACS to examine the ability of VM formation and the spatial relationship between VM and CSCs.Results: CSCs were associated with TNBC subtype and VM in human invasive breast cancer. CSCs in TNBC MDA-MB-231 cells formed more VM channels and expressed more molecules promoting VM than the non-TNBC MCF-7 cells in vitro. MDA-MB-231 cells that encircled VM channels on Matrigel expressed CD133. Moreover, CSCs were located near VM channels in the 3D reconstructed blood supply system in human TNBC grafts. The CD133+ and ALDH+ cells isolated from TA2 mouse breast cancer formed more VM channels in vivo.Conclusions: CSCs line VM channels directly. Additionally, CSCs provide more VM-related molecules to synergize VM formation. The signaling pathways that control CSC differentiation may also be potential treatment targets for TNBC.
基金Supported by Grants to Dr.Majumdar from NIH/NIA,No.AG014343the Department of Veterans Affairs(VA Merit Review)
文摘AIM: To demonstrated the combined effects of aging and carcinogen treatment on cancer stem/stem-like cells(CSCs) of gastric mucosa in an animal model. METHODS: In this study we investigated the effects of aging and Helicobacter pylori(H. pylori) inflammation as a model for inflammation induced carcinogenesis in human and rat gastric mucosa samples. In aging studies, we compared 4-mo old(young) with 22 mo(aged) old Fischer-344 rats. For human studies, gastric biop-sies and resection specimens representing normal mucosa or different stages of H. pylori gastritis and gastric adenocarcinomas were used for determining the expression of stem cell markers CD166, ALDH1 and LGR5. In addition we performed immunofluorescent double labeling for B-catenin and Lgr5 in both rat and human gastric tissues to examine the status of Wnt signaling in these cells. RESULTS: CSC markers ALDH1, LGR5, and CD166 were expressed in very low levels in normal human gastric mucosa or young rat gastric mucosa. In contrast, level of expression for all three markers significantly increased in H. pylori gastritis and gastric adenocarcinomas as well as in normal gastric mucosa in aged rats. We also observed cytoplasmic B-catenin staining in both aged rat and human H. pylori inflamed gastric mucosa, which were found to be colocalized with Lgr5 immunoreactive cells. The increased number of ALDH1, CD166 and LGR5 positive cells in H. pylori gastritis indicates that increased number of stem-like cells in gastric mucosa is an early event, and may constitute an important step in the progression to neoplasia. CONCLUSION: Our observation of the age-related increase in cancer stem/stem-like cells in the gastric mucosa may explain the increased incidence of gastric cancer during aging. Combination of aging and H. pylori infection may have additive effects in progression to neoplasia.
