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Pérez-Hernández J, Retana-González C, Ramos-Martínez E, Cruz-Colín J, Saralegui-Amaro A, Baltazar-Rosario G, Gutiérrez-Ruíz C, Aristi-Urista G, López-Vancell R. Entamoeba histolytica Trophozoites Interact with the c-Met Receptor at the Surface of Liver Origin Cells through the Gal/GalNAc Amoebic Lectin. Life (Basel) 2021; 11:life11090923. [PMID: 34575073 PMCID: PMC8470631 DOI: 10.3390/life11090923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/25/2021] [Accepted: 08/28/2021] [Indexed: 11/16/2022] Open
Abstract
Amoebiasis in humans is caused by the protozoan parasite Entamoeba histolytica, which cytotoxic activity has been demonstrated on a wide variety of target cells. The process involves the adherence of the parasite to the cell, and such adherence is mediated by an amoebic surface lectin, known as Gal/GalNAc lectin. It is composed of heavy, intermediate, and light subunits. The carbohydrate recognition domain (CRD) has been identified within a cysteine-rich region in the lectin heavy subunit and has an amino acid sequence identity to the receptor-binding domain of hepatocyte growth factor (HGF). Recombinant CRD has been previously shown to compete with HGF for binding to the c-Met receptor IgG fusion protein. In the present study, we searched for evidence of interaction between the Gal/GalNAc lectin at the surface of trophozoites with the c-Met receptor expressed at the surface of HepG2 in coculture assays. Immunoprecipitation of the coculture lysate indicated interaction of the c-Met with a 60 kDa peptide recognized by antiamoebic lectin antibody. Colocalization of both molecules was detected by fluorescence confocal microscopy. Incubation of HepG2 cells with HGF before coculture with trophozoites prevents the cytotoxic effect caused by the parasites but not their adherence to the cells. Our results point to Gal/GalNAc lectin as a ligand of the c-Met receptor at the surface of HepG2 cells.
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Affiliation(s)
- Jesus Pérez-Hernández
- Experimental Pathology Laboratory, Research Unit in Experimental Medicine, School of Medicine, National Autonomous University of Mexico, Mexico City 04519, Mexico; (J.P.-H.); (C.R.-G.); (E.R.-M.); (G.B.-R.)
| | - Clarisa Retana-González
- Experimental Pathology Laboratory, Research Unit in Experimental Medicine, School of Medicine, National Autonomous University of Mexico, Mexico City 04519, Mexico; (J.P.-H.); (C.R.-G.); (E.R.-M.); (G.B.-R.)
| | - Espiridión Ramos-Martínez
- Experimental Pathology Laboratory, Research Unit in Experimental Medicine, School of Medicine, National Autonomous University of Mexico, Mexico City 04519, Mexico; (J.P.-H.); (C.R.-G.); (E.R.-M.); (G.B.-R.)
| | - José Cruz-Colín
- National Institute of Genomic Medicine, Mexico City 14610, Mexico;
| | - Andrés Saralegui-Amaro
- National Laboratory for Advanced Microscopy, Institute of Biotechnology, National Autonomous University of Mexico, Cuernavaca, Morelos 62210, Mexico;
| | - Gabriela Baltazar-Rosario
- Experimental Pathology Laboratory, Research Unit in Experimental Medicine, School of Medicine, National Autonomous University of Mexico, Mexico City 04519, Mexico; (J.P.-H.); (C.R.-G.); (E.R.-M.); (G.B.-R.)
| | - Concepción Gutiérrez-Ruíz
- Cellular Physiology Laboratory, Biological and Health Sciences Division, Metropolitan Autonomous University, Mexico City 09340, Mexico;
| | - Gerardo Aristi-Urista
- Pathology Service, General Hospital of Mexico “Dr. Eduardo Liceaga”, School of Medicine, UNAM (National Autonomous University of Mexico), Mexico City 06720, Mexico;
| | - Rosario López-Vancell
- Experimental Pathology Laboratory, Research Unit in Experimental Medicine, School of Medicine, National Autonomous University of Mexico, Mexico City 04519, Mexico; (J.P.-H.); (C.R.-G.); (E.R.-M.); (G.B.-R.)
- Correspondence: ; Tel.: +52-55-5623-2699 (ext. 39945)
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E Lacerda RR, do Nascimento ES, de Lacerda JTJG, Pinto LDS, Rizzi C, Bezerra MM, Pinto IR, Filho SMP, Pinto VDPT, Filho GC, Gadelha CADA, Gadelha TS. Lectin from seeds of a Brazilian lima bean variety (Phaseolus lunatus L. var. cascavel) presents antioxidant, antitumour and gastroprotective activities. Int J Biol Macromol 2016; 95:1072-1081. [PMID: 27984144 DOI: 10.1016/j.ijbiomac.2016.10.097] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/28/2016] [Accepted: 10/27/2016] [Indexed: 12/29/2022]
Abstract
Lectins are proteins able to interact specifically and reversibly with carbohydrates. They are present in all living beings, particularly in legume seeds, which have many biological functions. The aim of this study was to isolate, characterize and verify antioxidant, anti-hemolytic, antitumor and gastroprotective activities in a lectin present in seeds of Phaseolus lunatus L. var. cascavel (PLUN). The isolation of lectin was performed by size exclusion chromatography on Sephadex G-100, which was isolated from a protein capable of agglutinating only human erythrocytes type A, being this the only inhibited haemagglutination n-acetyl-d-galactosamine. Its weight was estimated by PAGE is 128kDa. The lectin is thermostable up to 80°C and is active between pH 2-11. As 8M urea was able to denature the lectin. PLUN is a glycoprotein consisting of 2% carbohydrate and has antioxidant action with ascorbic acid equivalent antioxidant capacity (μMAA/g) of 418.20, 326 and 82.9 for total antioxidant activity, ABTS radical capture and capture of DPPH radical, respectively. The lectin has antitumor activity against melanoma derived cells at doses of 100 and 50mg/ml, reducing up to 83% tumor cells, and gastroprotective action, reducing up to 63% damaged area of the stomach induced by ethanol.
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Affiliation(s)
- Rodrigo Rodrigues E Lacerda
- Master by the Graduate Programme in Cellular and Molecular Biology at the Federal University of Paraíba (Universidade Federal da Paraíba), João Pessoa, Brazil.
| | | | | | | | - Caroline Rizzi
- Federal University of Pelotas (Universidade Federal de Pelotas), Pelotas, Brazil.
| | | | | | | | | | | | | | - Tatiane Santi Gadelha
- Federal University of Paraíba (Universidade Federal da Paraíba), João Pessoa, Brazil.
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Entamoeba histolytica: Overexpression of the gal/galnac lectin, ehcp2 and ehcp5 genes in an in vivo model of amebiasis. Parasitol Int 2016; 65:665-667. [PMID: 27616150 DOI: 10.1016/j.parint.2016.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/18/2016] [Accepted: 08/28/2016] [Indexed: 11/21/2022]
Abstract
The parasite Entamoeba histolytica causes intestinal amebiasis and amebic liver abscess as its main extraintestinal manifestation. To study the in vivo events related to inflammation and the interactions between hosts and parasites during amebiasis, we designed a novel model of host-parasite interactions using cellulose membrane dialysis bags containing E. histolytica trophozoites. A bag is placed into the hamster peritoneal cavity, as has been reported in previous studies of programmed cell death (PCD) in E. histolytica trophozoites. To determine if virulence factors such as cysteine proteinases (EhCP2 and EhCP5) and Gal/GalNAc lectin could be involved in the host-parasite interaction using this model, we examined the relative expression of the ehcp2 and ehcp5 genes and the carbohydrate recognition domain (crd) of Gal/GalNAc lectin using real-time quantitative PCR (qRT-PCR). All analyzed genes were over-expressed 0.5h after the initiation of the host-parasite interaction and were then progressively down-regulated. However, Gal/GalNAc lectin had the greatest increase in gene expression 1.5h after host-parasite interaction; Gal/GalNAc lectin had a 250-fold increase with respect to the axenically grown trophozoites, which over-express Gal/GalNAc lectin in in vivo models. These results support the important role of these molecules in the initiation of cell damage by E. histolytica.
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