一项试点研究,探讨由[a]pyrene引起的时间和剂量依赖的DNA损伤和染色体不稳定性,在两种尿细胞类型中进行
Jonas Wohlfahrt1, Nisha Verma1, Rasha Alsaleh1
1Institute and Outpatient Clinic of Occupational, Social, and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestr. 9-11, Erlangen 91054, Germany.
Mutation research
|April 3, 2024
概括
多环芳 (PAH),特别是 (B[a]P),可以导致DNA损伤,增加尿细胞癌症的风险. 与T24癌细胞相比,PUBEC细胞对B[a]P诱导的DNA损伤的敏感性更高.
科学领域:
- 环境毒理学环境毒理学
- 癌症研究 癌症研究
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 对多环芳 (PAH) 的环境和职业暴露与不良健康结果有关.
- 甲 (B[a]P),一种常见的PAH,被怀疑会导致尿膀癌,但数据仍然不足.
- 了解B[a]P的基因毒性对于评估人类癌症风险至关重要.
研究的目的:
- 为了研究B[a]P在尿细胞上的体外基因毒性.
- 评估B[a]P诱导DNA损伤,微核和染色体异常的潜力.
- 为了比较癌症细胞系 (T24) 和初级泌尿膀上皮细胞 (PUBEC) 与B[a]P.P.的敏感性.
主要方法:
- 暴露T24和PUBEC细胞在不同度和持续时间的B[a]P.
- 使用彗星测定对DNA损伤的评估.
- 量化微核的形成,染色体异常,核等离子体桥梁和核芽.
主要成果:
- 在24小时B[a]P治疗后,两种细胞类型的DNA损伤最高,PUBEC细胞表现出更大的敏感性.
- 即使在低B[a]P度下 (4小时后0.0027μM,24小时后0.00023μM) 也观察到PUBEC细胞中显著的DNA损伤.
- 在T24细胞中,微核形成的增加更为明显,而PUBEC细胞在暴露48小时后呈现出增加的核质桥梁和核芽.
结论:
- B[a]P在与人类相关的尿细胞中显示出基因毒性潜力.
- 与T24细胞相比,PUBEC细胞对B[a]P诱导的DNA损伤更为敏感.
- B[a]P可能会导致尿道膀癌的发病和进展.
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