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Evaluation of Modulators of cAMP-Response in Terms of Their Impact on Cell Cycle and Mitochondrial Activity of Leishmania donovani.
Saha, Amrita; Bhattacharjee, Anindita; Vij, Amit; Das, Pijush K; Bhattacharya, Arijit; Biswas, Arunima.
Afiliación
  • Saha A; Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
  • Bhattacharjee A; Department of Zoology, Cell and Molecular Biology Laboratory, University of Kalyani, Kalyani, India.
  • Vij A; Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
  • Das PK; Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
  • Bhattacharya A; Department of Microbiology, School of Life Sciences and Biotechnology, Adamas University, Kolkata, India.
  • Biswas A; Infectious Diseases and Immunology, CSIR-Indian Institute of Chemical Biology, Kolkata, India.
Front Pharmacol ; 11: 782, 2020.
Article en En | MEDLINE | ID: mdl-32670055
With the identification of novel cAMP binding effector molecules in Trypanosoma, the role of cAMP in kinetoplastida parasites gained an intriguing breakthrough. Despite earlier demonstrations of the role of cAMP in the survival of Leishmania during macrophage infection, there is essential need to specifically clarify the involvement of cAMP in various cellular processes in the parasite. In this context, we sought to gain a comprehensive understanding of the effect of cAMP analogs and cAMP-cyclic nucleotide phosphodiesterase (PDE) inhibitors on proliferation of log phase parasites. Administration of both hydrolyzable (8-pCPT-cAMP) and nonhydrolyzable analogs (Sp-8-pCPT-cAMPS) of cAMP resulted in a significant decrease of Leishmania proliferation. Among the various PDE inhibitors, etazolate was found to be potently antiproliferative. BrdU cell proliferation and K/N/F-enumeration microscopic study revealed that both cAMP analogs and selective PDE inhibitors resulted in significant cell cycle arrest at G1 phase with reduced S-phase population. Furthermore, careful examination of the flagellar motility patterns revealed significantly reduced coordinated forward flagellar movement of the promastigotes with a concomitant decrease in cellular ATP levels. Alongside, 8-pCPT-cAMP and PDE inhibitors etazolate and trequinsin showed marked reduction in mitochondrial membrane potential. Treatment of etazolate at subcytotoxic concentration to infected macrophages significantly reduced parasite burden, and administration of etazolate to Leishmania-infected BALB/c mice showed reduced liver and spleen parasite burden. Collectively, these results imply involvement of cAMP in various crucial processes paving the avenue for developing potent antileishmanial agent.
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Front Pharmacol Año: 2020 Tipo del documento: Article

Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Front Pharmacol Año: 2020 Tipo del documento: Article