Chetan CHITNIS |
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Information |
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Institut Pasteur, Department of Parasites and Insect Vectors | ||
Malaria Parasite Biology and Vaccines | ||
Paris | ||
0000-0002-8773-9865 | ||
This email address is being protected from spambots. You need JavaScript enabled to view it. | ||
https://research.pasteur.fr/en/team/malaria-parasite-biology-and-vaccines/ | ||
Scientific interests and projects |
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Our laboratory is interested in understanding the biology of blood stage malaria parasites. In particular we are interested in understanding the molecular processes that mediate merozoite egress from schizonts and merozoite invasion of RBCs. We study receptor-ligand interactions that mediate RBC invasion and the signaling processes that regulate steps such as microeneme and rhoptry secretion that are critical for receptor engagement during invasion. Information on parasite proteins involved in invasion will be used to develop multivalent blood stage vaccines for malaria. In the ParaFrap project, we will explore the signaling mechanisms involved in apical organelle secretion during host cell invasion. In particular we will study the role of second messengers including calcium and cyclic nucleotides, cAMP and cGMP, in regulating microneme secretion. A combination of molecular genetics and phosphoproteomic approaches will be used to decipher the signaling pathways responsible for microneme and rhoptry secretion. In addition, we will identify the critical parasite ligands involved in RBC invasion and try to identify combinations of parasite ligands that can be targeted with antibodies to synergistically block invasion with high efficiency. Such combinations will be developed as blood stage vaccines for P. falciparum malaria. Similar approaches will also be attempted with P. vivax for which short term in vitro invasion assays will be established using enriched reticulocytes and cryopresrved blood stage P. vivax isolates. |
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Top 5 publications of the last 5 years |
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1. Singh P., Alaganan A., More K. R., Lorthiois, A, Thiberge S Gorgette O., Guillotte Blisnick M., Guglielmini J., Aguilera S. S., Touqui L., Singh S., Chitnis CE. 2019. Role of a patatinlike phospholipase in Plasmodium falciparum gametogenesis and malaria transmission. Proc. Natl. Acad. Sci., USA. DOI 10.1073/pnas.1900266116. 2. Singh K, Mukherjee P, Shakri AR, Singh A, Pandey GC, Bakshi M, Uppal G, Jena R, Rawat A, Kumar P, Bhardwaj R, Yazdani SS, Hans D, Mehta S, Srinivasan A, Anil K, Madhusudhan RL Patel J, Singh A, Rao R, Gangireddy S, Patil R, Kaviraj S, Singh S, Carter D, Reed S, Kaslow DC, Birkett A, Chauhan VS, Chitnis CE. 2018. A malaria vaccine candidate based on Duffy binding protein elicits strain transcending functional antibodies in a Phase I clinical trial. NPJ Vaccines. 3:48. DOI 10.1038/s41541-018-0083-3. 3. Gupta S, Singh S, Popovici J, Roesch C, Shakri AR, Guillotte-Blisnick M, Huon C, Menard D, Chitnis CE. 2018. Targeting a reticulocyte binding protein and Duffy binding protein to inhibit reticulocyte invasion by Plasmodium vivax. Sci Rep. 8(1):10511. DOI 10.1038/s41598-018-28757-4. 4. Chitnis CE, Mukherjee P, Mehta S, Yazdani SS, Dhawan S, Shakri AR, Bhardwaj R, Gupta PK, Hans D, Mazumdar S, Singh B, Kumar S, Pandey G, Parulekar V, Imbault N, Shivyogi P, Godbole G, Mohan K, Leroy O, Singh K, Chauhan VS. 2015. Phase I clinical trial of a recombinant blood stage vaccine candidate for Plasmodium falciparum malaria based on MSP1 and EBA175. PLoS One. 10(4):e0117820. DOI doi.org/10.1371/journal.pone.0117820 5. Dawn A, Singh S, More KR, Siddiqui FA, Pachikara N, Ramdani G, Langsley G, Chitnis CE. The central role of cAMP in regulating Plasmodium falciparum merozoite invasion of human erythrocytes. 2014. PLoS Pathogens. 10(12):e1004520. DOI doi.org/10.1371/journal.ppat.1004520 |
Postdoctoral position, Institut Pasteur, Paris, France A 24-month post-doctoral position starting on March 1st 2025 and funded by the French National Research Agency (ANR) is available in the Trypanosome...
Postdoctoral positions, LPHI Lab, Montpellier, France Two ERC-funded (JANUS 2024-2029) postdoc positions are open in the lab to study cell cycle regulation in malaria...
Postdoctoral position, Institut Pasteur, Paris, France A postdoc position is available at the Institut Pasteur Paris, in the signalling and host-parasite interactions research group, headed by Dr Najma Rachidi...
ABOUT SPEAKERS PROGRAMME REGISTRATION CONTACT LOCATION About the workshop ParaFrap is organizing the ParaFrap Next Generation in Parasitology...
[Communiqué] As part of the actions of the Health Innovation Plan 2030, the health component of the France 2030 plan, Mohamed-Ali Hakimi is one of the 22 laureates of an Excellence Chair in Biology/Health, supported to conduct high-level research...
The York Biomedical Research Institute (YBRI) are hosting an online live seminar on Friday 24th May 1-2pm BST as part of their biomedical science seminar series. You are all welcome to attend - registration is required via the...
[Communiqué] Congratulations to Arthur Talman, IRD Research Leader in the MIVEGEC laboratory (Montpellier), who has been awarded an Advanced Grant from the European Research Council (ERC) for the project "TROJAN - Molecular mimicry and immune...
Ana Rita Gomes, a CNRS Research Associate at the Laboratory of Pathogens and Host Immunity in Montpellier, and former Postdoctoral fellow of the LabEx ParaFrap, has been awarded the prestigious CNRS Bronze Medal in 2023. This...
Happy New Year 2024! To kick off this new scientific year, here is the ParaFrap webinar schedule. Since January 2021, ParaFrap has been organizing a series of webinars. This monthly event, held every 2nd Thursday of the month, aims to strengthen...
The team of Dr. Mohamed-Ali Hakimi, in collaboration with Isabelle Coppens (Johns Hopkins University Bloomberg School of Public Health and Malaria Research Institute, Baltimore, MD, USA), has developed a new (epi)genetic method to produce in vitro...
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