Role of Macrophage PIST Protein in Regulating Leishmania major Infection.

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  • Additional Information
    • Source:
      Publisher: ACS Publications Country of Publication: United States NLM ID: 101654580 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2373-8227 (Electronic) Linking ISSN: 23738227 NLM ISO Abbreviation: ACS Infect Dis Subsets: MEDLINE
    • Publication Information:
      Original Publication: Washington, DC : ACS Publications, [2015]-
    • Subject Terms:
      Leishmania major*/metabolism ; Leishmaniasis* ; Macrophages*/parasitology; Animals ; Beclin-1/metabolism ; Carrier Proteins/metabolism
    • Abstract:
      PDZ protein interacting specifically with Tc10 or PIST is a mammalian trans-Golgi resident protein that regulates subcellular sorting of plasma membrane receptors. PIST has recently emerged as a key player in regulating viral pathogenesis. Nevertheless, the involvement of PIST in parasitic infections remains unexplored. Leishmania parasites infiltrate their host macrophage cells through phagocytosis, where they subsequently multiply within the parasitophorous vacuole (PV). Host cell autophagy has been found to be important in regulating this parasite infection. Since PIST plays a pivotal role in triggering autophagy through the Beclin 1-PI3KC3 pathway, it becomes interesting to identify the status of PIST during Leishmania infection. We found that while macrophage cells are infected with Leishmania major ( L. major ), the expression of PIST protein remains unaltered; however, it traffics from the Golgi compartment to PV. Further, we identified that in L. major -infected macrophage cells, PIST associates with the autophagy regulatory protein Beclin 1 within the PVs; however, PIST does not interact with LC3. Reduction in PIST protein through siRNA silencing significantly increased parasite burden, whereas overexpression of PIST in macrophages restricted L. major infectivity. Together, our study reports that the macrophage PIST protein is essential in regulating L. major infectivity.
    • Contributed Indexing:
      Keywords: Beclin 1; Golgi; Leishmania; PIST; macrophage
    • Accession Number:
      0 (Beclin-1)
      0 (Carrier Proteins)
    • Publication Date:
      Date Created: 20240401 Date Completed: 20240415 Latest Revision: 20240613
    • Publication Date:
      20240614
    • Accession Number:
      10.1021/acsinfecdis.4c00156
    • Accession Number:
      38556987