BACKGROUND Gastric cancer(GC)is one of the most common malignant tumors of the digestive system worldwide,the prognosis of patients with advanced GC remains poor.AIM To evaluate the combined expression characteristics...BACKGROUND Gastric cancer(GC)is one of the most common malignant tumors of the digestive system worldwide,the prognosis of patients with advanced GC remains poor.AIM To evaluate the combined expression characteristics of cancer stem cell markers CD24 and CD133 in GC pathological tissues,and to explore their association with patients’clinicopathological parameters and postoperative survival outcomes.METHODS A total of 304 GC patients who underwent surgical treatment in our hospital from January 2018 to January 2020 were retrospectively included.Immunohistochemistry was used to detect the protein expression of CD24 and CD133 in tumor tissues,adjacent tissues,and normal gastric mucosa tissues.Based on staining intensity and the proportion of positive cells,expression levels were classified into low and high expression,while clinicopathological parameters were recorded.χ2 test was used to evaluate the correlation between expression and categorical variables,Spearman rank correlation analysis was performed to assess the correlation between the expression intensities of the two markers,and multivariate regression models were applied to identify independent risk factors influencing co-expression.Kaplan-Meier survival curves and Log-rank test were used to compare survival differences among groups with different expression patterns.RESULTS Among the 304 patients,155 cases(50.99%)were CD24 positive,including 91 low-expression and 64 highexpression;133 cases(43.75%)were CD133 positive,including 81 low-expression and 52 high-expression.There were 74 cases(24.34%)with double positivity and 81 cases(26.64%)with double negativity.Compared with tumor tissues,the positive rates of CD24 and CD133 in normal gastric tissues and adjacent tissues were significantly lower(P<0.05).Univariate analysis showed that co-expression of CD24 and CD133 in GC tissues was significantly correlated with tumor size,Lauren classification,T stage,N stage,and vascular invasion(P<0.05),but not with patient age,gender,tumor site,World Health Organization histological classification,or M stage(P>0.05).Further multivariate regression analysis suggested that tumor size,T stage,N stage,and vascular invasion were independent risk factors promoting CD24 and CD133 double positivity.Spearman rank correlation analysis indicated a moderate positive correlation between their expression intensities(r=0.420,P<0.001).During follow-up,29 of 304 patients were lost(loss rate 9.54%);146 deaths occurred.According to expression combination,there were 89 cases of CD24 single positivity(39 deaths),68 cases of CD133 single positivity(31 deaths),81 cases of double negativity(25 deaths),and 66 cases of double positivity(51 deaths).Log-rank test showed significant differences in overall survival among the four groups(χ2=20.89,P<0.001),with CD24+/CD133+group showing the worst prognosis.CONCLUSION CD24 and CD133 exhibit high positive detection rates in GC tissues,and their co-positivity is closely associated with tumor stage progression and significantly indicates unfavorable survival outcomes.The co-expression of CD24/CD133 may reflect higher aggressiveness and metastatic potential of GC,serving as a potential prognostic marker and a direction for targeted therapeutic strategies.However,as this is a single-center retrospective study with limitations such as patient loss to follow-up and sample size,further prospective,multicenter,and mechanistic studies are required to validate its clinical applicability and biological role.展开更多
肺癌作为全球高发的恶性肿瘤,其流行病学现状严峻,对公众健康构成重大威胁。分化簇133(cluster of differentiation 133,CD133)、分化簇44(cluster of differentiation 44,CD44)及细胞角蛋白19片段抗原21-1(cy-tokeratin 19 fragment,CY...肺癌作为全球高发的恶性肿瘤,其流行病学现状严峻,对公众健康构成重大威胁。分化簇133(cluster of differentiation 133,CD133)、分化簇44(cluster of differentiation 44,CD44)及细胞角蛋白19片段抗原21-1(cy-tokeratin 19 fragment,CYFRA21-1)作为肺癌研究中的关键分子,其在肺癌组织中的表达模式及分子机制日益受到关注。本文综述了CD133在肺癌细胞增殖、迁移、侵袭及预后评估中的作用,探讨了CD44在肺癌细胞粘附、迁移、侵袭及与细胞外基质相互作用中的研究进展,同时分析了CYFRA21-1在肺癌诊断及预后评估中的临床应用价值。同时阐述了CD133、CD44及CYFRA21-1在肺癌组织中的共同表达模式及其协同作用,为肺癌的发生、发展及预后评估提供了新的视角。未来研究将深入探索这些分子的分子机制,并开发新型肺癌诊断和治疗策略。展开更多
基金National Natural Science Foundation of China,No.82003223and China Postdoctoral Science Foundation,No.2020M671398.
文摘BACKGROUND Gastric cancer(GC)is one of the most common malignant tumors of the digestive system worldwide,the prognosis of patients with advanced GC remains poor.AIM To evaluate the combined expression characteristics of cancer stem cell markers CD24 and CD133 in GC pathological tissues,and to explore their association with patients’clinicopathological parameters and postoperative survival outcomes.METHODS A total of 304 GC patients who underwent surgical treatment in our hospital from January 2018 to January 2020 were retrospectively included.Immunohistochemistry was used to detect the protein expression of CD24 and CD133 in tumor tissues,adjacent tissues,and normal gastric mucosa tissues.Based on staining intensity and the proportion of positive cells,expression levels were classified into low and high expression,while clinicopathological parameters were recorded.χ2 test was used to evaluate the correlation between expression and categorical variables,Spearman rank correlation analysis was performed to assess the correlation between the expression intensities of the two markers,and multivariate regression models were applied to identify independent risk factors influencing co-expression.Kaplan-Meier survival curves and Log-rank test were used to compare survival differences among groups with different expression patterns.RESULTS Among the 304 patients,155 cases(50.99%)were CD24 positive,including 91 low-expression and 64 highexpression;133 cases(43.75%)were CD133 positive,including 81 low-expression and 52 high-expression.There were 74 cases(24.34%)with double positivity and 81 cases(26.64%)with double negativity.Compared with tumor tissues,the positive rates of CD24 and CD133 in normal gastric tissues and adjacent tissues were significantly lower(P<0.05).Univariate analysis showed that co-expression of CD24 and CD133 in GC tissues was significantly correlated with tumor size,Lauren classification,T stage,N stage,and vascular invasion(P<0.05),but not with patient age,gender,tumor site,World Health Organization histological classification,or M stage(P>0.05).Further multivariate regression analysis suggested that tumor size,T stage,N stage,and vascular invasion were independent risk factors promoting CD24 and CD133 double positivity.Spearman rank correlation analysis indicated a moderate positive correlation between their expression intensities(r=0.420,P<0.001).During follow-up,29 of 304 patients were lost(loss rate 9.54%);146 deaths occurred.According to expression combination,there were 89 cases of CD24 single positivity(39 deaths),68 cases of CD133 single positivity(31 deaths),81 cases of double negativity(25 deaths),and 66 cases of double positivity(51 deaths).Log-rank test showed significant differences in overall survival among the four groups(χ2=20.89,P<0.001),with CD24+/CD133+group showing the worst prognosis.CONCLUSION CD24 and CD133 exhibit high positive detection rates in GC tissues,and their co-positivity is closely associated with tumor stage progression and significantly indicates unfavorable survival outcomes.The co-expression of CD24/CD133 may reflect higher aggressiveness and metastatic potential of GC,serving as a potential prognostic marker and a direction for targeted therapeutic strategies.However,as this is a single-center retrospective study with limitations such as patient loss to follow-up and sample size,further prospective,multicenter,and mechanistic studies are required to validate its clinical applicability and biological role.
文摘目的通过定量检测GPR133基因甲基化位点,探讨其在早期胃癌淋巴结转移(lymph node metastasis,LNM)预测中的临床价值。方法回顾性选取2023年1月至2024年5月山东大学第二医院消化内科收治的100例T1期胃癌患者为研究对象;采用MethylationEPIC芯片分析T1期胃癌LNM阳性和阴性患者的手术组织样本,评估全基因组甲基化状态并识别差异甲基化位点(differentially methylated positions,DMPs);基于基因富集和功能预测确定候选DMPs;选用20例LNM阳性及80例阴性患者的福尔马林固定石蜡包埋(formalin-fixed and parrfin-embedded,FFPE)切片通过焦磷酸测序验证候选DMPs的甲基化水平;采用受试者操作特征曲线下面积(area under curve,AUC)评估DMPs在早期胃癌LNM诊断中的临床价值。结果MethylationEPIC芯片分析显示,T1期胃癌LNM阳性样本具有特异性甲基化图谱;以|Δβ|≥0.1且P<0.01为筛选标准,共初步筛选出1794个DMPs;根据基因匹配、TCGA数据库分析及cAMP binding途径的富集结果,明确GPR133基因上的cg00633768为候选位点;焦磷酸测序结果显示,cg00633768位点甲基化水平能够显著区分LNM阳性和阴性样本(AUC=0.869,敏感性64.3%,特异性100%,截断值0.6189)。结论与LNM阴性患者相比,GPR133基因的cg00633768位点在LNM阳性患者中呈显著高甲基化状态,对预测早期胃癌LNM具有重要的临床价值。
文摘肺癌作为全球高发的恶性肿瘤,其流行病学现状严峻,对公众健康构成重大威胁。分化簇133(cluster of differentiation 133,CD133)、分化簇44(cluster of differentiation 44,CD44)及细胞角蛋白19片段抗原21-1(cy-tokeratin 19 fragment,CYFRA21-1)作为肺癌研究中的关键分子,其在肺癌组织中的表达模式及分子机制日益受到关注。本文综述了CD133在肺癌细胞增殖、迁移、侵袭及预后评估中的作用,探讨了CD44在肺癌细胞粘附、迁移、侵袭及与细胞外基质相互作用中的研究进展,同时分析了CYFRA21-1在肺癌诊断及预后评估中的临床应用价值。同时阐述了CD133、CD44及CYFRA21-1在肺癌组织中的共同表达模式及其协同作用,为肺癌的发生、发展及预后评估提供了新的视角。未来研究将深入探索这些分子的分子机制,并开发新型肺癌诊断和治疗策略。
