Homozygosity for the CD1E★02 allele is associated with a resistance to Plasmodium falciparum malaria infection in Gabonese school children

Objective:To explore the possible association between polymorphisms in CD1 genes and both asymptomatic and mild Plasmodium falciparum infection.Methods:Two clusters of 85 school children,from the village of Dienga(Gabon) were investigated.The first group was analysed for the prevalence and the multiplicity of asymptomatic Plasmodium falciparum infection,whereas the second group was screened for the frequency of malarial attacks.Results:Our findings showed that homozygosity for the CD1E★02 allele was associated with a low frequency of malarial attacks.Furthermore,a strong association between CD1E★02 homozygotes and the resistance to multiple malarial attacks was identified.The CD1A★01 allele showed a weak association with a small number of malarial attacks.Conclusion:Our results suggest a possible role of CD1E polymorphisms in malaria protection among school children and that CD1e molecules are involved in anti-malarial immunity.

补肾生血法对慢性再障患者表达α_5β_1/CD49e水平影响的研究

目的:探讨补肾生血法对慢性再生障碍性贫血(简称慢性再障,CAA)患者α5β1/CD49e表达水平的影响。方法:将60例慢性再障患者随机分为实验组和对照组,分别给予补髓生血颗粒和康力龙,采用逆转录-聚合酶链反应(RT-PCR)检测α5β1/CD49e的mRNA表达,流式细胞术(FCM)检测骨髓造血干/祖细胞α5β1/CD49e的表达水平。结果:CAA骨髓单个核细胞整合素α5β1/CD49e mRNA及骨髓造血干/祖细胞α5β1/CD49e呈低表达状态,补肾中药补髓生血颗粒能促进其表达,与有效药物康力龙比较无显著差异(P(0.05)。结论:CAA可能存在骨髓微环境功能缺陷,调节骨髓造血干/祖细胞粘附分子的表达,改善骨髓造血干/祖细胞与骨髓基质细胞/细胞外基质间的粘附功能,从而促进骨髓造血功能恢复可能是补髓生血颗粒治疗CAA的作用理之一。

食管鳞癌Cyclin D1、E-cadherin、CD44v6表达及临床病理因素与淋巴结转移的关系

目的：探讨影响食管鳞癌（ESCC）淋巴结转移（LNM）的临床病理及生物学相关因素。方法：应用免疫组化S-P法检测60例食管鳞癌（LNM阳性组与阴性组各30例）标本中CyclinD1、E-cad、CD44v6蛋白表达,并对两组病例的检测结果及相关临床病理资料作对比研究。结果：比较转移组与非转移组ESCC,发现侵袭肌层与穿透肌层的癌LNM率分别是37.1%和68%,P=0.018;Ⅰ级、Ⅱ级和Ⅲ级鳞癌的LNM率分别是27.8%、45.5%和75%,P=0.013;Ⅰ、Ⅱ期与Ⅲ、Ⅳ期癌的LNM率分别是36.4%和66.7%,P=0.020;E-cad阳性与阴性癌的LNM率分别是38.5%和71.4%,P=0.028;CD44v6阳性与阴性癌的LNM率分别是65%和20%,P〈0.0001。Pearson’s相关分析显示,LNM与癌侵袭深度（rs=0.304）、肿瘤分期（rs=0.302）、CD44v6（rs=0.278）过表达呈显著正相关,P〈0.05;与癌分化程度（rs=-0.377）和E-cad（rs=-0.294）阳性表达呈显著负相关,P〈0.03。结论：癌的分化程度、侵袭深度、临床分期、CD44v6过表达和E-cad阴性表达是影响ESCCLNM的重要因素。CD44v6和E-cad的不同表达在LNM中可能起协同作用,联合检测CD44v6和E-cad的表达,可作为预测ESCC预后的参考指标。