Altered expression, polymerisation and cellular distribution of alpha-/beta-tubulins and apoptosis-like cell death in arsenite resistant Leishmania donovani promastigotes

International Journal for Parasitology
K G Jayanarayan, Chinmoy S Dey

Abstract

Studies in mammalian systems have shown specific affinity of arsenite for tubulin proteins. The sodium m-arsenite (NaAsO2) resistant Leishmania donovani used in this study is resistant to 20 microM NaAsO2, which is a 13-fold increase in resistance compared to the wild type. Data presented in this study shows decreased expression of alpha- and beta-tubulin in wild type L. donovani promastigotes on exposure to NaAsO2 from 0.0016 to 5.0 microM (IC50 in the wild type strain) in a dose-dependent manner. alpha- and beta-tubulins in the resistant strain show decreased expression levels only at 65.0 microM NaAsO2 (IC50 in the resistant strain). Treatment with respective IC50 concentrations of NaAsO2 caused alterations in tubulin polymerisation dynamics and deregulated the cellular distribution of the microtubules in wild type and resistant strains. The NaAsO2-induced cell death exhibited characteristics of apoptosis-like DNA laddering and fragmentation in both the affected wild type and resistant cells. However, poly(ADP-ribose)polymerase cleavage was evident in the wild type strain but not in the resistant strain.

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Citations

Apr 7, 2005·Molecular and Biochemical Parasitology·Gaganmeet SinghChinmoy S Dey
Nov 11, 2010·Parasites & Vectors·Antonio Jiménez-RuizHilary Hurd
Nov 18, 2011·Molecular Biology International·Arun Kumar HaldarSyamal Roy
Jul 9, 2013·Molecular and Biochemical Parasitology·Fabiana S V MatrangoloSilvane M F Murta
Jul 9, 2011·Molecular and Biochemical Parasitology·Neha BiyaniRentala Madhubala
Jun 1, 2007·Western Journal of Nursing Research·Eileen Kae Kintner
May 12, 2018·Molecular Diversity·Juan Carlos Sánchez-SalgadoYareli Rojas-Aguirre
Jan 25, 2007·Journal of Medical Microbiology· AshutoshNeena Goyal
Feb 5, 2021·Parasitology·Sajad RashidiPaul Nguewa

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