通过使用类似于二氧化的化合物进行体外人类血液构造差异化的调节
D M Isha Olive Khan1, Robert B Crawford1, Norbert E Kaminski2
1Institute for Integrative Toxicology, Michigan State University, MI, USA.
Toxicology
|April 5, 2025
概括
类似二氧化物化合物 (DLCs) 改变了人类造血干细胞的分化,有利于骨髓系而不是淋巴系. 这可能会降低免疫能力,与小鼠研究相比,其强度有所不同.
科学领域:
- 毒理学 毒理学 毒理学
- 血液形成 血液形成 血液形成
- 免疫学 免疫学 免疫学
背景情况:
- 类似二氧化物化合物 (DLCs) 是具有已知的健康风险的环境污染物.
- DLCs对人类血液形成的作用,即血液细胞形成的过程,仍然在很大程度上未被探索.
- 了解DLC对造血干细胞和原生细胞 (HSPC) 的影响对于人类健康风险评估至关重要.
研究的目的:
- 调查特定的DLCs2,3,4,7,8-pentachlorodibenzofuran (PeCDF),3,4,4',5-tetrachlorobiphenyl (PCB81),和3,3',4,4',5-pentachlorobiphenyl (PCB126) 在人类HSPC谱系规范中的作用.
- 为了比较这些DLCs与2,3,7,8-四二二二氧化物 (TCDD) 的作用.
- 识别敏感的造血系并了解通过基碳化合物受体 (AHR) 作用的机制.
主要方法:
- 人类带血衍生的CD34+HSPCs在体外培养了28天.
- 细胞暴露于TCDD和选择的DLC,其度从0.1到50nm不等.
- 流细胞计用于分析细胞群,包括CD10+,CD34+,CD1c+,CD41+和CD14+标志物,每隔7天.
主要成果:
- 根据剂量,TCDD,PeCDF,PCB-126和PCB-81减少了淋巴细胞原始体 (CD10+) 和CD10蛋白表达.
- 在这些效应中,PeCDF显示出比TCDD更高的功效;PCB81在这些效应中比PCB126更强大.
- TCDD和PeCDF减少了CD34+细胞和CD1c+树突细胞,增加了前体细胞,并显示了通过AHR介导的减少巨核细胞前体细胞 (CD41+) 和增加单核细胞 (CD14+) 的趋势.
结论:
- DLCs显著改变了人类的HSPC分化,以牺牲淋巴细胞祖先为代价促进了髓状血统,可能会损害免疫能力.
- 在人类HSPC分化中,DLC的相对强度不同于小鼠的毒理学概况,突出了特定物种的反应.
- 这项研究确定了对DLCs敏感的关键血统,为这些环境污染物的人类健康风险评估提供了关键的见解.
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