CHINESE JOURNAL OF PARASITOLOGY AND PARASITIC DISEASES ›› 2022, Vol. 40 ›› Issue (3): 396-401.doi: 10.12140/j.issn.1000-7423.2022.03.018

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Research progress on reticulocyte binding proteins associated with Plasmodium vivax invasion of reticulocytes

SHI Tian-qi(), CHEN Jun-hu()   

  1. National Institute of Plarasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
  • Received:2021-12-27 Revised:2022-03-13 Online:2022-06-30 Published:2022-07-06
  • Contact: CHEN Jun-hu E-mail:761561107@qq.com;chenjh@nipd.chinacdc.cn
  • Supported by:
    Fifth Round of Three-Year Public Health Action Plan of Shanghai(GWV-10.1-XK13);Project of Shanghai Science and Technology Commission(18490741100)

Abstract:

Plasmodium vivax is the most geographically widespread malaria parasite that causes most malaria infection cases outside the most malarious continent, sub-Saharan Africa. P. vivax preferentially invades reticulocytes, with a high species specificity. P. vivax reticulocyte binding protein (PvRBP) family has been implicated in roles in reticulocyte invasion and severity of P. vivax infections. The members of PvRBP family act as invasion ligands that mediate new pathways for the parasites to invade reticulocytes, and therefore, are considered important immune targets. Importantly, PvRBP2a-CD98 and PvRBP2b-TfR1 have been identified as two major ligand-receptor pairs implicated in the invasion of reticulocytes by P. vivax. The Pvrbp family is highly polymorphic and can generate immune evasion, which can increase the efficiency of vivax malaria invasion and the severity of the disease. With the advances in research on the molecular mechanisms of P. vivax invasion, insights have been provided on members of this protein family as promising antimalarial vaccine candidates, able to generate high titer antibodies for effective prevention and control of vivax malaria. This review summarizes the role of reticulocytes in P. vivax infection and the function of the PvRBP proteins family as immune targets in the human population.

Key words: Plasmodium vivax, Reticulocyte binding protein, Invasion, Natural acquired immunity

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