A
Ajay Kumar
Researcher at Rajendra Memorial Research Institute of Medical Sciences
Publications - 24
Citations - 337
Ajay Kumar is an academic researcher from Rajendra Memorial Research Institute of Medical Sciences. The author has contributed to research in topics: Leishmania donovani & Leishmania. The author has an hindex of 10, co-authored 24 publications receiving 222 citations.
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Leishmania infection activates host mTOR for its survival by M2 macrophage polarization.
Ajay Kumar,Sushmita Das,Abhishek Mandal,Sudha Verma,Kumar Abhishek,Ashish Kumar,Vinod Kumar,Ayan Kumar Ghosh,Pradeep Das +8 more
TL;DR: It is observed that inhibition of M2 macrophage polarization reduced Leishmania survival inside macrophages, suggesting that mTOR plays a crucial role in regulation of M1 macrophAGE polarization and direct the innate immune homeostasis towards parasite survival inside host.
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Deprivation of L-Arginine Induces Oxidative Stress Mediated Apoptosis in Leishmania donovani Promastigotes: Contribution of the Polyamine Pathway
Abhishek Mandal,Sushmita Das,Saptarshi Roy,Ayan Kumar Ghosh,Abul Hasan Sardar,Sudha Verma,Savita Saini,Ruby Singh,Kumar Abhishek,Ajay Kumar,Chitra Mandal,Pradeep Das +11 more
TL;DR: The growth and survival of Leishmania depends on the availability of extracellular L-arginine, and in its absence the parasite undergoes ROS mediated, caspase-independent apoptosis-like cell death, therefore, L- arginine metabolism pathway could be a probable target for controlling the growth ofLeishmania parasites and disease pathogenesis.
Journal ArticleDOI
Leishmania donovani Activates Hypoxia Inducible Factor-1α and miR-210 for Survival in Macrophages by Downregulation of NF-κB Mediated Pro-inflammatory Immune Response.
Vinod Kumar,Ajay Kumar,Sushmita Das,Ashish Kumar,Kumar Abhishek,Sudha Verma,Abhishek Mandal,Rakesh K. Singh,Pradeep Das +8 more
TL;DR: Findings suggested that L. donovani infection induces hypoxic environment inside the macrophages that activates HIF-1α, which upregulates miR-210, which eventually establishes a suitable environment for the survival of parasite inside the host macrophage by downregulating NF-κB mediated pro-inflammatory immune responses.
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l-Arginine Uptake by Cationic Amino Acid Transporter Promotes Intra-Macrophage Survival of Leishmania donovani by Enhancing Arginase-Mediated Polyamine Synthesis.
Abhishek Mandal,Sushmita Das,Ajay Kumar,Saptarshi Roy,Sudha Verma,Ayan Kumar Ghosh,Ruby Singh,Kumar Abhishek,Savita Saini,Savita Saini,Abul Hasan Sardar,Bidyut Purkait,Ashish Kumar,Chitra Mandal,Pradeep Das +14 more
TL;DR: It is demonstrated that intra-macrophage survival of L. donovani depends on the availability of extracellular l-arginine, and the involvement of the transporters is observed, providing clear evidence for targeting the metabolism of l- arginine and l- Arginine-metabolizing enzymes as an important therapeutic and prophylactic strategy to treat VL.
Journal ArticleDOI
Leishmania donovani Inhibitor of Serine Peptidases 2 Mediated Inhibition of Lectin Pathway and Upregulation of C5aR Signaling Promote Parasite Survival inside Host.
Sudha Verma,Abhishek Mandal,Md. Yousuf Ansari,Ajay Kumar,Kumar Abhishek,Ayan Kumar Ghosh,Ashish Kumar,Vinod Kumar,Sushmita Das,Pradeep Das +9 more
TL;DR: It is found that rLdISP2 significantly reduces the formation of C3, C5 convertase, and membrane attacking complex (MAC) by lectin pathway (LP) resulting in significant reduction in serum mediated lysis of the parasites.