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Albuquerque DAP, Cavalcanti IT, Vasconcelos LRS, Montenegro F, Pereira LMMB, Cavalcanti MSM, Moura P, Júnior LBC, de Almeida SMV, Beltrão EIC. Molecular profile of mannan-binding lectin in hepatitis C patients with MBL gene polymorphisms by a modified mannan-coated nitrocellulose assay. J Immunol Methods 2018; 460:101-106. [PMID: 30056939 DOI: 10.1016/j.jim.2018.06.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 06/25/2018] [Accepted: 06/25/2018] [Indexed: 02/08/2023]
Abstract
The aim of this study was to develop an assay to analyze the serum profile of Mannose-binding lectin (MBL) through a simple and "in-house" method (called "dot-N-man"). Furthermore, the study attempted to associate molecular masses of MBL to the profile of MBL gene polymorphisms in patients with hepatitis C. Heterogeneity in molecular masses of MBL is due to the impairment of oligomers formation, which is linked to genetic polymorphisms in the MBL gene. Individuals with AA genotype (wild-type) produce high-molecular-mass proteins, whereas AO and OO individuals produce intermediate and low-molecular-mass proteins, respectively. Sera of thirty patients carrying the hepatitis C virus (HCV) were investigated using MBL binding assay with mannan-coated nitrocellulose (dot-N-man). Purified MBL was evaluated by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and Western blotting. Dot-N-Man assay yielded MBL with molecular masses ranging between 55 and 320 kDa, comparable to low and high molecular mass forms of MBL. Nonreducing SDS-PAGE showed high molecular mass bands in all AA individuals while bands of 270 and 205 kDa were observed in sera for a number of patients with AO and OO genotypes, respectively. Immunoblotting confirmed the MBL samples obtained from the dot-N-man. These results provide new insights to understand the MBL molecular forms profile in patients infected with HCV- which could be useful in future investigations on the influence of the MBL structure/genotype on both the progression of infection and the response to hepatitis C therapy.
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Affiliation(s)
- Diego A P Albuquerque
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Igor T Cavalcanti
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Luydson R S Vasconcelos
- Instituto do Fígado e Transplantes de Pernambuco - IFP, Recife, PE, Brazil; Faculdade de Ciências Médicas, Universidade de Pernambuco (UPE), Recife, PE, Brazil; Instituto de Pesquisas Aggeu Magalhães - FIOCRUZ, Recife, PE, Brazil
| | - Francisco Montenegro
- Laboratório de Biologia Molecular de Vírus, Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, PE, Brazil
| | - Leila M M B Pereira
- Instituto do Fígado e Transplantes de Pernambuco - IFP, Recife, PE, Brazil; Faculdade de Ciências Médicas, Universidade de Pernambuco (UPE), Recife, PE, Brazil
| | - Maria S M Cavalcanti
- Laboratório de Biologia Molecular de Vírus, Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, PE, Brazil; Faculdade de Ciências Médicas, Universidade de Pernambuco (UPE), Recife, PE, Brazil
| | - Patrícia Moura
- Laboratório de Biologia Molecular de Vírus, Instituto de Ciências Biológicas, Universidade de Pernambuco, Recife, PE, Brazil; Faculdade de Ciências Médicas, Universidade de Pernambuco (UPE), Recife, PE, Brazil
| | - Luiz B C Júnior
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brazil; Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Sinara Mônica Vitalino de Almeida
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brazil; Universidade de Pernambuco (UPE), Faculdade de Ciências, Educação e Tecnologia de Garanhuns (FACETEG), Garanhuns, PE, Brazil.
| | - Eduardo I C Beltrão
- Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco, Recife, PE, Brazil; Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Recife, PE, Brazil
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Human lectins and their roles in viral infections. Molecules 2015; 20:2229-71. [PMID: 25642836 PMCID: PMC6272597 DOI: 10.3390/molecules20022229] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/21/2015] [Accepted: 01/23/2015] [Indexed: 12/20/2022] Open
Abstract
Innate recognition of virus proteins is an important component of the immune response to viral pathogens. A component of this immune recognition is the family of lectins; pattern recognition receptors (PRRs) that recognise viral pathogen-associated molecular patterns (PAMPs) including viral glycoproteins. In this review we discuss the contribution of soluble and membrane-associated PRRs to immunity against virus pathogens, and the potential role of these molecules in facilitating virus replication. These processes are illustrated with examples of viruses including human immunodeficiency virus (HIV), hepatitis C virus (HCV) and Ebola virus (EBOV). We focus on the structure, function and genetics of the well-characterised C-type lectin mannose-binding lectin, the ficolins, and the membrane-bound CD209 proteins expressed on dendritic cells. The potential for lectin-based antiviral therapies is also discussed.
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