ArticleParasites & vectors2019
Toxoplasma gondii ROP18 inhibits human glioblastoma cell apoptosis through a mitochondrial pathway by targeting host cell P2X1.
Article in Parasites & vectors, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
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Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it, 19 citations in OpenAlex.
- Pooled it
- Article
- Culture supernatant ofOncology letters · 2025Article
- A landscape review with novel criteria to evaluate microbial drivers for cancer: priorities for innovative research targeting excessive cancer mortality in sub-Saharan Africa.Frontiers in cellular and infection microbiology · 2025Review
- Article
- Toxoplasma rhoptry proteins that affect encephalitis outcome.Cell death discovery · 2023Review
- Testosterone Augments Propagation of Toxoplasma gondii in Glioblastoma Cells In Vitro.Acta parasitologica · 2022Article
- Host cell proteins modulated upon Toxoplasma infection identified using proteomic approaches: a molecular rationale.Parasitology research · 2022Review
- Plasmodium infection suppresses colon cancer growth by inhibiting proliferation and promoting apoptosis associated with disrupting mitochondrial biogenesis and mitophagy in mice.Parasites & vectors · 2022Article
- Article
- BH3-Only Proteins Noxa and Puma Are Key Regulators of Induced Apoptosis.Life (Basel, Switzerland) · 2022Review
- In vitro and in vivoFood science & nutrition · 2021Article
- Silver Nanoparticle-Induced Apoptosis in ARPE-19 Cells Is Inhibited byInternational journal of nanomedicine · 2020Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
backgroundApoptosis plays a critical role in the embryonic development, homeostasis of immune system and host defense against intracellular microbial pathogens. Infection by the obligate intracellular pathogen Toxoplasma gondii can both inhibit and induce host cell apoptosis; however, the parasitic factors involved remain unclear. The T. gondii virulence factor ROP18 (TgROP18) has been reported to regulate host cell apoptosis; nevertheless, results for this regulation have been rarely reported or have provided contradictory findings. Human purinergic receptor 1 (P2X1) is an ATP-gated ion channel that responds to ATP stimulation and functions in cell apoptosis mediation. The precise roles of TgROP18 in T. gondii pathogenesis, and the relationship between TgROP18 and host P2X1 in host cell apoptosis are yet to be revealed.
methodsApoptosis rates were determined by flow cytometry (FCM) and TUNEL assay. The interaction between TgROP18 and the host P2X1 was measured by fluorescence resonance energy transfer (FRET) and co-immunoprecipitation (co-IP) assay. Calcium influx and mitochondrial membrane depolarization were determined by FCM after JC-1 staining. The translocation of cytochrome C (Cyt C), Bax and Bcl2 proteins, expression of the apoptotic proteins PARP and caspase activation were detected by western blotting.
resultsThe apoptosis rates of glial or immune cells (human SF268, mouse RAW264.7 and human THP-1 cells) infected by any T. gondii strain (RH-type I, ME49-type II and VEG-type III) were significantly inhibited compared with their uninfected controls. TgROP18 inhibited ATP-induced apoptosis of SF268 with P2X1 expression, but had no effect on RAW264.7 or THP-1 cells without detectable P2X1 expression. It was further identified that TgROP18 interacted with P2X1, and overexpression of ROP18 in COS7 cells significantly inhibited cell apoptosis mediated by P2X1. Moreover, TgROP18 also inhibited P2X1-mediated Ca
conclusionsToxoplasma gondii infection inhibits ATP-induced host cell apoptosis, regardless of strain virulence and host cell lines. TgROP18 targets the purinergic receptor P2X1 of the SF268 human neural cells and inhibits ATP-induced apoptosis through the mitochondrial pathway, suggesting a sensor role for the host proapoptotic protein P2X1 in this process.
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