Transcriptional control of the Cryptosporidium life cycle

• 成果类型: Article
• 署名作者: Walzer, Katelyn A.; Tandel, Jayesh; Byerly, Jessica H.; Daniels, Abigail M.; Gullicksrud, Jodi A.; Whelan, Eoin C.; Carro, Stephen D.; Krespan, Elise; Beiting, Daniel P.; Striepen, Boris
• 署名单位: University of Pennsylvania; University of Pennsylvania
• 刊物名称: Nature
• ISSN/ISSBN: 0028-4719
• DOI: 10.1038/s41586-024-07466-1
• 发表日期: 2024-06-06
• 关键词: oocyst wall; protein; gene; chlamydomonas; apicomplexan; COMMITMENT; CHILDREN; sequence; burden; parvum

摘要

The parasite Cryptosporidium is a leading agent of diarrhoeal disease in young children, and a cause and consequence of chronic malnutrition(1,2). There are no vaccines and only limited treatment options(3). The parasite infects enterocytes, in which it engages in asexual and sexual replication(4), both of which are essential to continued infection and transmission. However, their molecular mechanisms remain largely unclear(5). Here we use single-cell RNA sequencing to reveal the gene expression programme of the entire Cryptosporidiumparvum life cycle in culture and in infected animals. Diverging from the prevailing model(6), we find support for only three intracellular stages: asexual type-I meronts, male gamonts and female gametes. We reveal a highly organized program for the assembly of components at each stage. Dissecting the underlying regulatory network, we identify the transcription factor Myb-M as the earliest determinant of male fate, in an organism that lacks genetic sex determination. Conditional expression of this factor overrides the developmental program and induces widespread maleness, while conditional deletion ablates male development. Both have a profound impact on the infection. A large set of stage-specific genes now provides the opportunity to understand, engineer and disrupt parasite sex and life cycle progression to advance the development of vaccines and treatments.