The Schistosoma mansoni nuclear receptor FTZ-F1 maintains esophageal gland function via transcriptional regulation of meg-8.3.

The Schistosoma mansoni nuclear receptor FTZ-F1 maintains esophageal gland function via transcriptional regulation of meg-8.3.
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DOI:
10.1371/journal.ppat.1010140
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发表时间:
2021-12
期刊:
影响因子:
6.7
通讯作者:
Collins JJ 3rd
Collins JJ 3rd
中科院分区:
医学1区
文献类型:
--
作者:
Romero AA;Cobb SA;Collins JNR;Kliewer SA;Mangelsdorf DJ;Collins JJ 3rd

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血吸虫感染了世界上2亿多最贫穷的人,但不幸的是,治疗依赖于一种药物。核激素受体是一种配体激活的转录因子,在后生动物中调节多种过程,但很少有功能特征的染色体。在对核受体功能的系统分析中,我们发现FTZ-F1样受体对寄生虫的生存至关重要。使用转录谱和染色质免疫沉淀(ChIP)的组合,我们发现,微外显子基因meg-8.3是SmFTZ-F1的转录靶点。我们发现Smftz-f1和meg-8.3都是食管腺维持以及蠕虫头部完整性所必需的。总之,这些研究定义了寄生虫中微外显子基因功能的新作用,并表明与食管腺相关的因素可能代表可行的治疗靶点。据估计,血吸虫每年造成25万人死亡,并导致数百万人严重发病。因此,我们必须继续了解寄生虫的基本过程,以便开发新的治疗方法。在这里,我们确定了一个转录调节蛋白SmFTZ-F1是至关重要的寄生虫生存。我们发现这种蛋白质控制着一个特定的基因(meg-8.3)的水平,而meg-8.3对维持蠕虫的食道腺至关重要。meg-8.3或Smftz-f1的缺失导致寄生虫头部组织的退化。这些研究表明,与食管腺功能相关的分子可能是治疗靶点。
Schistosomes infect over 200 million of the world’s poorest people, but unfortunately treatment relies on a single drug. Nuclear hormone receptors are ligand-activated transcription factors that regulate diverse processes in metazoans, yet few have been functionally characterized in schistosomes. During a systematic analysis of nuclear receptor function, we found that an FTZ-F1-like receptor was essential for parasite survival. Using a combination of transcriptional profiling and chromatin immunoprecipitation (ChIP), we discovered that the micro-exon gene meg-8.3 is a transcriptional target of SmFTZ-F1. We found that both Smftz-f1 and meg-8.3 are required for esophageal gland maintenance as well as integrity of the worm’s head. Together, these studies define a new role for micro-exon gene function in the parasite and suggest that factors associated with the esophageal gland could represent viable therapeutic targets. Schistosomes kill an estimated 250,000 people every year and cause severe morbidity in millions more. Therefore, it is critical we continue to understand fundamental processes in the parasite so new therapies can be developed. Here, we identify a transcriptional regulator protein SmFTZ-F1 that is critical for parasite survival. We find that this protein controls the levels of a schistosome-specific gene (meg-8.3) and that meg-8.3 is critical for the maintenance of the worm’s esophageal gland. Loss of \ either meg-8.3 or Smftz-f1 leads to degeneration of the parasites’ head tissues. These studies suggest that molecules associated with esophageal gland function could represent therapeutic targets.
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