Suppr超能文献

在克氏锥虫生命周期中减数分裂和同源重组相关基因的差异表达。

Differential expression of meiosis and homologous recombination-related genes in the life cycle of Trypanosoma cruzi.

机构信息

Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia.

Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia.

出版信息

Parasitol Res. 2023 Aug;122(8):1747-1757. doi: 10.1007/s00436-023-07850-2. Epub 2023 Jun 5.

Abstract

Trypanosoma cruzi has a complex life cycle consisting of four morphological and distinct biological stages. Although some authors suggest that T. cruzi primarily follows clonal reproduction, recent genomic and transcriptomic studies indicate an unorthodox capacity for recombination. We aimed to estimate the differential gene expression of 10 meiosis/homologous recombination-related genes during the T. cruzi life cycle, including epimastigotes, under two different types of stress (oxidative stress and pH changes). We performed RT-qPCR tests using novel-designed primers to estimate the differential gene expression (∆Ct and ∆∆Ct) of nine genes (SPO11, HAP2, RAD50, MRN complex, BRCA2, DMC1, MND1, and RPA1) and RAD51, which was previously reported. Our results show basal expression of all genes during the life cycle, indicating their hypothetical role in several cellular processes but with specific signatures of differential gene expression during the life cycle (HAP2, RPA, RAD50, BRCA2, MND1, and DMC1) and oxidative stress (RPA, MRE11, NBS1, BRCA2, MND1, and RAD51). Additionally, we found that the MRN complex has an independent level of expression in T. cruzi, with profiles of MRE11 and NBS1 upregulated in some stages. Recent studies on other trypanosomatids have highlighted the influence of HAP2 and RPA in recombination and hybridization. If T. cruzi uses the same repertoire of genes, our findings could suggest that metacyclogenesis may be the putative step that the parasite uses to undergo recombination. Likewise, our study reveals the differential profiles of genes expressed in response to oxidative and pH stress. Further studies are necessary to confirm our findings and understand the recombination mechanism in T. cruzi.

摘要

克氏锥虫具有复杂的生命周期,包括四个形态和明显不同的生物学阶段。虽然一些作者认为克氏锥虫主要遵循无性繁殖,但最近的基因组和转录组研究表明,它具有非正统的重组能力。我们旨在估计 10 个减数分裂/同源重组相关基因在克氏锥虫生命周期中的差异表达,包括在两种不同类型的应激(氧化应激和 pH 变化)下的滋养体。我们使用新设计的引物进行 RT-qPCR 测试,以估计九个基因(SPO11、HAP2、RAD50、MRN 复合物、BRCA2、DMC1、MND1 和 RPA1)和 RAD51 的差异基因表达(∆Ct 和 ∆∆Ct),RAD51 先前已被报道。我们的结果表明,在生命周期中所有基因均有基础表达,表明它们在几个细胞过程中具有假设作用,但在生命周期中具有特定的差异基因表达特征(HAP2、RPA、RAD50、BRCA2、MND1 和 DMC1)和氧化应激(RPA、MRE11、NBS1、BRCA2、MND1 和 RAD51)。此外,我们发现 MRN 复合物在克氏锥虫中有独立的表达水平,在一些阶段 MRE11 和 NBS1 的表达上调。最近对其他锥虫的研究强调了 HAP2 和 RPA 在重组和杂交中的影响。如果克氏锥虫使用相同的基因库,我们的发现可能表明,动基体生成可能是寄生虫进行重组的假定步骤。同样,我们的研究揭示了对氧化应激和 pH 应激反应的基因差异表达谱。需要进一步的研究来证实我们的发现并理解克氏锥虫中的重组机制。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验