The enteric protozoan parasite Entamoeba histolytica is the causative agent of human amebiasis. During infection, adherence of E. histolytica through Gal/GalNAc lectin on the surface of the amoeba can induce caspase-3-dependent or -independent host cell death. Phosphorylinositol 3-kinase (PI3K) and protein kinase C (PKC) in E. histolytica play an important function in the adhesion, killing, or phagocytosis of target cells. In this study, we examined the role of amoebic PI3K and PKC in amoeba-induced apoptotic cell death in Jurkat T cells. When Jurkat T cells were incubated with E. histolytica trophozoites, phosphatidylserine (PS) externalization and DNA fragmentation in Jurkat cells were markedly increased compared to those of cells incubated with medium alone. However, when amoebae were pretreated with a PI3K inhibitor, wortmannin before being incubated with E. histolytica, E. histolytica-induced PS externalization and DNA fragmentation in Jurkat cells were significantly reduced compared to results for amoebae pretreated with DMSO. In addition, pretreatment of amoebae with a PKC inhibitor, staurosporine strongly inhibited Jurkat T cell death. However, E. histolytica-induced cleavage of caspase-3, -6, and -7 were not inhibited by pretreatment of amoebae with wortmannin or staurosporin. In addition, we found that amoebic PI3K and PKC have an important role on amoeba adhesion to host compartment. These results suggest that amebic PI3K and PKC activation may play an important role in caspase-independent cell death in Entamoeba-induced apoptosis.
Citations
Citations to this article as recorded by
PI3K/AKT signaling in parasites and parasite diseases: Role and therapeutic potential Lujun Yan, Yating Li, Xing Yang, Rui Li, Chunyin Zhu, Xuedong He, Xiaoliang Jin, Guanghui Zheng, Naunain Mehmood, William C. Cho, Shijun Bao, Houhui Song, Yadong Zheng Virulence.2025;[Epub] CrossRef
Formation and culture of cell spheroids by using magnetic nanostructures resembling a crown of thorns Shijiao Li, Jingjiang Qiu, Zhongwei Guo, Qiulei Gao, Chen-Yu Huang, Yilin Hao, Yifan Hu, Tianshui Liang, Ming Zhai, Yudong Zhang, Bangbang Nie, Wei-Jen Chang, Wen Wang, Rui Xi, Ronghan Wei Biofabrication.2024; 16(4): 045018. CrossRef
AGC family kinase of Entamoeba histolytica: Decoding the members biochemically Azhar Ahmad, Vikas Kumar, Tushar Kushwaha, Akash Kumar, Deepak Sehgal, Krishna K. Inampudi, Somlata, Katherine S. Ralston PLOS Pathogens.2024; 20(11): e1012729. CrossRef
Pathogenicity and virulence of
Entamoeba histolytica
, the agent of amoebiasis
Nancy Guillén Virulence.2023;[Epub] CrossRef
Apoptotic mimicry as a strategy for the establishment of parasitic infections: parasite- and host-derived phosphatidylserine as key molecule João Luiz Mendes Wanderley, Renato Augusto DaMatta, Marcello André Barcinski Cell Communication and Signaling.2020;[Epub] CrossRef
Entamoeba histolytica Up-Regulates MicroRNA-643 to Promote Apoptosis by Targeting XIAP in Human Epithelial Colon Cells Itzel López-Rosas, César López-Camarillo, Yarely M. Salinas-Vera, Olga N. Hernández-de la Cruz, Carlos Palma-Flores, Bibiana Chávez-Munguía, Osbaldo Resendis-Antonio, Nancy Guillen, Carlos Pérez-Plasencia, María Elizbeth Álvarez-Sánchez, Esther Ramírez-Mo Frontiers in Cellular and Infection Microbiology.2019;[Epub] CrossRef
Phosphatidylinositol Kinases and Phosphatases in Entamoeba histolytica Kumiko Nakada-Tsukui, Natsuki Watanabe, Tomohiko Maehama, Tomoyoshi Nozaki Frontiers in Cellular and Infection Microbiology.2019;[Epub] CrossRef
AGC family kinase 1 participates in trogocytosis but not in phagocytosis in Entamoeba histolytica
Somlata, Kumiko Nakada-Tsukui, Tomoyoshi Nozaki Nature Communications.2017;[Epub] CrossRef
First
Prev
