目的探讨乳腺癌干细胞样标志物CD44+CD24-/low在基底样乳腺癌(basal—like breast carcinoma,BLBC)中过表达与BLBC恶性预后的相关性。方法在乳腺癌基因表达分型的基础上,根据雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因...目的探讨乳腺癌干细胞样标志物CD44+CD24-/low在基底样乳腺癌(basal—like breast carcinoma,BLBC)中过表达与BLBC恶性预后的相关性。方法在乳腺癌基因表达分型的基础上,根据雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(Her-2)免疫表型的表达选取乳腺癌组织四组:管腔A组、管腔B/C组、Her-2高表达组及三阴性组;对三阴性组检测CK5/6、EGFR,分为正常乳腺样型和BLBC型两组;对上述5组进行免疫组化Envision法染色,选用抗体为CD44、CD24,观察CD44+CD24-/low表型表达并比较BLBC组与其它各组的差异。结果(1)三阴性组共60例,CK5/6和或EGFR阳性者41例(68.3%),确定为BLBC;CK5/6、EGFR阴性者19例(31.7%),确定为正常乳腺样组;(2)CD44+CD24-/low表型在BLBC组中占78.0%(32/41),相对于管腔A组37.9%(11/29)、管腔B组25.9%(7/27)、Her-2高表达组17.2%(5/29)、正常乳腺样组26.3%(5/21),表达增高并具有显著性(P〈0.05);(3)所有150例乳腺癌中(可评价145例)具有CD44+CD24-/low免疫表型者其Ki-67指数增高相对于非CD44+CD24-/low表型具有统计学差异(P〈0.001)。结论BLBC型乳腺癌表达乳腺癌干细胞样标志物CD44+CD24-/low显著高于其它各型乳腺癌,CD44+CD24-/low与BLBC独特的恶性生物学行为相关。展开更多
Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-t...Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.展开更多
文摘目的探讨乳腺癌干细胞样标志物CD44+CD24-/low在基底样乳腺癌(basal—like breast carcinoma,BLBC)中过表达与BLBC恶性预后的相关性。方法在乳腺癌基因表达分型的基础上,根据雌激素受体(ER)、孕激素受体(PR)、人类表皮生长因子受体2(Her-2)免疫表型的表达选取乳腺癌组织四组:管腔A组、管腔B/C组、Her-2高表达组及三阴性组;对三阴性组检测CK5/6、EGFR,分为正常乳腺样型和BLBC型两组;对上述5组进行免疫组化Envision法染色,选用抗体为CD44、CD24,观察CD44+CD24-/low表型表达并比较BLBC组与其它各组的差异。结果(1)三阴性组共60例,CK5/6和或EGFR阳性者41例(68.3%),确定为BLBC;CK5/6、EGFR阴性者19例(31.7%),确定为正常乳腺样组;(2)CD44+CD24-/low表型在BLBC组中占78.0%(32/41),相对于管腔A组37.9%(11/29)、管腔B组25.9%(7/27)、Her-2高表达组17.2%(5/29)、正常乳腺样组26.3%(5/21),表达增高并具有显著性(P〈0.05);(3)所有150例乳腺癌中(可评价145例)具有CD44+CD24-/low免疫表型者其Ki-67指数增高相对于非CD44+CD24-/low表型具有统计学差异(P〈0.001)。结论BLBC型乳腺癌表达乳腺癌干细胞样标志物CD44+CD24-/low显著高于其它各型乳腺癌,CD44+CD24-/low与BLBC独特的恶性生物学行为相关。
基金supported by the Medical Science and Technology Research Foundation of Guangdong Province(No.A2020559).
文摘Objective This study aimed to examine the role of long non-coding RNA PCED1B antisense RNA 1(PCED1B-AS1)in the development of hepatocellular carcinoma(HCC).Methods A total of 62 pairs of HCC tissues and adjacent non-tumor tissues were obtained from 62 HCC patients.The interactions of PCED1B-AS1 and microRNA-34a(miR-34a)were detected by dual luciferase activity assay and RNA pull-down assay.The RNA expression levels of PCED1B-AS1,miR-34a and CD44 were detected by RT-qPCR,and the protein expression level of CD44 was determined by Western blotting.The cell proliferation was detected by cell proliferation assay,and the cell invasion and migration by transwell invasion assay.The HCC tumor growth after PCED1B-AS1 was downregulated was determined by in vivo animal study.Results PCED1B-AS1 was highly expressed in HCC tissues,which was associated with poor survival of HCC patients.Furthermore,PCED1B-AS1 interacted with miR-34a in HCC cells,but they did not regulate the expression of each other.Additionally,PCED1B-AS1 increased the expression level of CD44,which was targeted by miR-34a.The cell proliferation and invasion assay revealed that miR-34a inhibited the proliferation and invasion of HCC in vitro,while CD44 exhibited the opposite effects.Furthermore,PCED1B-AS1 suppressed the role of miR-34a.Moreover,the knockdown of PCED1B-AS1 repressed the HCC tumor growth in nude mice in vivo.Conclusion PCED1B-AS1 may play an oncogenic role by regulating the miR-34a/CD44 axis in HCC.