alexa Autophagy Protects Monocytes From Wolbachia Heat Shock Protein 60 (rWmhsp60) Induced Apoptosis And Senescence
ISSN: 2155-9597

Journal of Bacteriology & Parasitology
Open Access

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2nd International Congress on Bacteriology & Infectious Diseases
November 17-19, 2014 DoubleTree by Hilton Hotel Chicago-North Shore, USA

Kamalakannan V, Shiny C, Babu S and Narayanan R B
Accepted Abstracts: J Bacteriol Parasitol
DOI: 10.4172/2155-9597.S1.008
Abstract
Monocyte dysfunctions by filarial antigens have been postulated as major mechanism underlying immune evasion following hypo responsiveness during patent lymphatic filariasis. Recent studies have initiated a paradigm shift to comprehend the immunological interactions of Wolbachia and its antigens in inflammation, apoptosis in monocytes, lymphocyte anergy, etc. Here we showed that rWmhsp60 (recombinant Wolbachia heat shock protein 60) interacts with TLR-4 and induces apoptosis in monocytes of endemic normal, but not in chronic patients. Higher levels of reactive oxygen species (ROS) induced following TLR-4 stimulation resulted in loss of mitochondrial membrane potential and caspase cascade activation, which are the plausible reason for apoptosis. Furthermore, release in ROS owing to TLR-4 signalling resulted in the activation of NFĸB p65 nuclear translocation which lead to inflammation and apoptosis via TNF-receptor pathway following the increase in IL-6 and TNF-α levels. Here for the first time, we report that in addition to apoptosis, rWmhsp60 a possible antigen in filarial pathogenesis also induce molecular senescence in monocytes. Targeting TLR-4 therefore presents a promising candidate for treating rWmhsp60 induced apoptosis and senescence. Strikingly, induction of autophagy by rapamycin, detains TLR-4 in late endosomes and subverts TLR-4-rWmhsp60 interaction thus protecting TLR-4 mediated apoptosis and senescence. Also, rapamycin induced monocytes were unresponsive to rWmhsp60 and triggered lymphocyte activation and proliferation following PHA stimulation. With the perspective of the evidences put forward, targeting inherent autophagic degradation pathway may provide perfect catalyst to herald a potential area of research for the development of inherent methods to treat filariasis and other inflammatory conditions.
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