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Ricaurte-Contreras LA, Lovera A, Moreno-Pérez DA, Bohórquez MD, Suárez CF, Gutiérrez-Vásquez E, Cuy-Chaparro L, Garzón-Ospina D, Patarroyo MA. Two 20-Residue-Long Peptides Derived from Plasmodium vivax Merozoite Surface Protein 10 EGF-Like Domains Are Involved in Binding to Human Reticulocytes. Int J Mol Sci 2021; 22:ijms22041609. [PMID: 33562650 PMCID: PMC7915351 DOI: 10.3390/ijms22041609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 01/21/2021] [Accepted: 02/02/2021] [Indexed: 11/30/2022] Open
Abstract
Plasmodium parasites’ invasion of their target cells is a complex, multi-step process involving many protein-protein interactions. Little is known about how complex the interaction with target cells is in Plasmodium vivax and few surface molecules related to reticulocytes’ adhesion have been described to date. Natural selection, functional and structural analysis were carried out on the previously described vaccine candidate P. vivax merozoite surface protein 10 (PvMSP10) for evaluating its role during initial contact with target cells. It has been shown here that the recombinant carboxyl terminal region (rPvMSP10-C) bound to adult human reticulocytes but not to normocytes, as validated by two different protein-cell interaction assays. Particularly interesting was the fact that two 20-residue-long regions (388DKEECRCRANYMPDDSVDYF407 and 415KDCSKENGNCDVNAECSIDK434) were able to inhibit rPvMSP10-C binding to reticulocytes and rosette formation using enriched target cells. These peptides were derived from PvMSP10 epidermal growth factor (EGF)-like domains (precisely, from a well-defined electrostatic zone) and consisted of regions having the potential of being B- or T-cell epitopes. These findings provide evidence, for the first time, about the fragments governing PvMSP10 binding to its target cells, thus highlighting the importance of studying them for inclusion in a P. vivax antimalarial vaccine.
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Affiliation(s)
- Laura Alejandra Ricaurte-Contreras
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
- MSc Programme in Microbiology, Universidad Nacional de Colombia, Carrera 45#26-85, Bogotá 111321, Colombia
| | - Andrea Lovera
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Darwin Andrés Moreno-Pérez
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Michel David Bohórquez
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Carlos Fernando Suárez
- Biomathematics Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia;
| | - Elizabeth Gutiérrez-Vásquez
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Laura Cuy-Chaparro
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Diego Garzón-Ospina
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
| | - Manuel Alfonso Patarroyo
- Molecular Biology and Immunology Department, Fundación Instituto de Inmunología de Colombia (FIDIC), Carrera 50#26-20, Bogotá 111321, Colombia; (L.A.R.-C.); (A.L.); (D.A.M.-P.); (M.D.B.); (E.G.-V.); (L.C.-C.); (D.G.-O.)
- Health Sciences Division, Main Campus, Universidad Santo Tomás, Carrera 9#51-11, Bogotá 110231, Colombia
- Microbiology Department, Faculty of Medicine, Universidad Nacional de Colombia, Carrera 45#26-85, Bogotá 111321, Colombia
- Correspondence:
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Usman MA, Ibrahim MA, Salman AA, Sallau AB. Depletion of cholesterol could be associated with modulation of progesterone but not other sex hormone levels during Plasmodium falciparum infection in humans: a cross-sectional study from Zaria, Nigeria. Parasitol Res 2020; 119:4143-4150. [PMID: 32951142 DOI: 10.1007/s00436-020-06826-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 07/21/2020] [Indexed: 10/23/2022]
Abstract
In order for Plasmodium falciparum to grow and survive in its host, membrane biogenesis, fueled by host cholesterol, is essential for these processes. Consistent with this essential role, more insights into the cholesterol pathway would enhance the current understanding of the pathophysiology of malaria infection. To explore its broader potential, we conducted a cross-sectional study and assayed for the serum levels of cholesterol, vitamin D, progesterone, testosterone, estradiol and bile acid in both P. falciparum-infected patients and apparently healthy sex-matched participants. Our results revealed that the levels of cholesterol, vitamin D, progesterone, testosterone and estradiol in P. falciparum-infected patients were significantly (p < 0.05) lower compared to those in control groups whereas the level of bile acid in P. falciparum-infected patients was significantly (p < 0.05) higher compared to that in control groups. Additionally, cholesterol and the metabolic products with the exception of bile acid had a significant (p < 0.05) association with the parasite density in P. falciparum-infected patients with moderate and high P. falciparum infections. Furthermore, all the metabolic products of cholesterol had an insignificant (p > 0.05) association with the cholesterol in P. falciparum-infected patients with the exception of progesterone which showed a significant (p < 0.05) association with cholesterol in the malaria-infected female patients. Data from the present study demonstrated that progesterone depletion in P. falciparum-infected female patients could be a consequence of P. falciparum-induced decrease in cholesterol.
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