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Queiroz MAF, Gomes STM, Almeida NCC, Souza MIM, Costa SRCF, Hermes RB, Lima SS, Zaninotto MM, Fossa MAA, Maneschy MA, Martins-Feitosa RN, Azevedo VN, Machado LFA, Ishak MOG, Ishak R, Vallinoto ACR. Mannose-binding lectin 2 (Mbl2) gene polymorphisms are related to protein plasma levels, but not to heart disease and infection by Chlamydia. ACTA ACUST UNITED AC 2016; 49:e5519. [PMID: 27982280 PMCID: PMC5188863 DOI: 10.1590/1414-431x20165519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 09/01/2016] [Indexed: 01/20/2023]
Abstract
The presence of the single nucleotide polymorphisms in exon 1 of the mannose-binding lectin 2 (MBL2) gene was evaluated in a sample of 159 patients undergoing coronary artery bypass surgery (71 patients undergoing valve replacement surgery and 300 control subjects) to investigate a possible association between polymorphisms and heart disease with Chlamydia infection. The identification of the alleles B and D was performed using real time polymerase chain reaction (PCR) and of the allele C was accomplished through PCR assays followed by digestion with the restriction enzyme. The comparative analysis of allelic and genotypic frequencies between the three groups did not reveal any significant difference, even when related to previous Chlamydia infection. Variations in the MBL plasma levels were influenced by the presence of polymorphisms, being significantly higher in the group of cardiac patients, but without representing a risk for the disease. The results showed that despite MBL2 gene polymorphisms being associated with the protein plasma levels, the polymorphisms were not enough to predict the development of heart disease, regardless of infection with both species of Chlamydia.
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Affiliation(s)
- M A F Queiroz
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - S T M Gomes
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - N C C Almeida
- Fundação de Hematologia e Hemoterapia do Pará, Belém, PA, Brasil
| | - M I M Souza
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - S R C F Costa
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - R B Hermes
- Fundação de Hematologia e Hemoterapia do Pará, Belém, PA, Brasil
| | - S S Lima
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - M M Zaninotto
- Hospital de Clínicas Gaspar Vianna, Belém, PA, Brasil
| | - M A A Fossa
- Hospital Beneficência Portuguesa, Belém, PA, Brasil
| | - M A Maneschy
- Hospital Beneficência Portuguesa, Belém, PA, Brasil
| | - R N Martins-Feitosa
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - V N Azevedo
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - L F A Machado
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - M O G Ishak
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - R Ishak
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - A C R Vallinoto
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
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Pires EP, Bernardino-Vallinoto CV, Alves DM, Migone SRC, Machado LFA, Ishak MOG, Ishak R, Cayres-Vallinoto IMV, Vallinoto ACR. Prevalence of infection by JC and BK polyomaviruses in kidney transplant recipients and patients with chronic renal disease. Transpl Infect Dis 2011; 13:633-7. [PMID: 21414116 DOI: 10.1111/j.1399-3062.2011.00614.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present study investigated the prevalence of infection by JC and BK polyomaviruses (JCV and BKV) in patients with chronic renal disease (CRD), kidney transplant recipients, and a control group of asymptomatic subjects. We tested a total of 295 urine samples. After DNA extraction, polymerase chain reaction assay was used to amplify a fragment of 173 bp of the polyomavirus T antigen, followed by analysis using the BamHI restriction endonuclease. Infection by polyomavirus was detected in 17.6% (52/295 subjects) of the subjects. Whereas 30.5% (18/59) of transplant recipients were infected, the frequency was only 22.4% (30/134) in the control subjects, and 3.9% (4/102) in the CRD group (all JCV). The vast majority of infections (88.9%; 16/18) in transplant recipients were of the BKV type, whereas this type was absent in CRD patients, and made up only 10.0% (3/30) of infections in the control group. The risk of BKV infection was 72 times greater in renal transplant patients than in asymptomatic subjects. The low frequency of infection found in CRD patients may have been related to elevated levels of urea excreted in the urine, together with reduced urine volume and cell content. These factors may combine to reduce viral load or inhibit amplification. The results of the study indicate a need for the routine screening for polyomavirus in pre- and post-transplant patients, as well as organ donors, considering that BKV infection has been associated with graft rejection in kidney transplants.
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Affiliation(s)
- E P Pires
- Laboratório de Virologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
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Vallinoto ACR, Graça ES, Araújo MS, Azevedo VN, Cayres-Vallinoto I, Machado LFA, Ishak MOG, Ishak R. IFNG +874T/A polymorphism and cytokine plasma levels are associated with susceptibility to Mycobacterium tuberculosis infection and clinical manifestation of tuberculosis. Hum Immunol 2010; 71:692-6. [PMID: 20353805 DOI: 10.1016/j.humimm.2010.03.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 03/13/2010] [Accepted: 03/22/2010] [Indexed: 01/22/2023]
Abstract
Regarding the importance of interferon-gamma (IFN-gamma) in protective immunity against Mycobacterium tuberculosis and the functional role of IFNG +874T/A single nucleotide polymorphism (SNP) in the IFN-gamma production, the present study investigated the relationship of this genetic polymorphism with susceptibility to tuberculosis (TB). A total of 129 patients with pulmonary tuberculosis (PTB), 33 with extrapulmonary tuberculosis (EPTB), and 156 control subjects were studied. Blood samples were drawn and plasma was used to measure IFN-gamma serum concentration by enzyme-linked immunoassay. DNA samples were extracted from leukocytes and used to investigate +874T/A polymorphism in IFNG gene using allele-specific oligonucleotide-polymerase chain reaction. An association between the presence of the allele +874A and the genotype +874AA with the active tuberculosis was found (p < 0.0001, 95% confidence interval = 1.64-3.22), at the same time that allele + 874T and genotype +874T/T were more frequent in the control group. The average plasma concentration of IFN-gamma among patients with tuberculosis was significantly lower than in the control group, and were lower in the EPTB group than in the group with PTB, suggesting a relationship of low plasma levels of this cytokine with active tuberculosis and the progression to more serious forms of the disease. Furthermore, we observed the association of the +874T/T and +874A/A genotypes with high and low IFN-gamma plasma concentrations, respectively, both in TB patients and in the control groups. Thus our findings suggest an association of the IFNG +874T/A polymorphism with susceptibility to M. tuberculosis infection in the studied population.
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Affiliation(s)
- Antonio C R Vallinoto
- Virus Laboratory, Institute for Biological Sciences, Federal University of Para, Para, Brazil.
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Vallinoto ACR, Muto NA, Alves AEM, Machado LFA, Azevedo VN, Souza LLB, Ishak MOG, Ishak R. Characterization of polymorphisms in the mannose-binding lectin gene promoter among human immunodeficiency virus 1 infected subjects. Mem Inst Oswaldo Cruz 2008; 103:645-9. [DOI: 10.1590/s0074-02762008000700003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 10/23/2008] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - NA Muto
- Universidade Federal do Pará, Brasil
| | - AEM Alves
- Universidade Federal do Pará, Brasil
| | | | | | - LLB Souza
- Unidade de Referência Especializada em Doenças Infecciosas e Parasitárias Especiais, Brasil
| | - MOG Ishak
- Universidade Federal do Pará, Brasil
| | - R Ishak
- Universidade Federal do Pará, Brasil
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Alves AEM, Hermes RB, Tamegão-Lopes B, Machado LFA, Azevedo VN, Ishak MOG, Ishak R, Lemos JAR, Vallinoto ACR. Polymorphism in the promoter region of the mannose-binding lectin gene among human T-cell lymphotropic virus infected subjects. Mem Inst Oswaldo Cruz 2007; 102:991-4. [DOI: 10.1590/s0074-02762007000800015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Accepted: 12/18/2007] [Indexed: 05/25/2023] Open
Affiliation(s)
- AEM Alves
- Universidade Federal do Pará, Brasil
| | - RB Hermes
- Universidade Federal do Pará, Brasil
| | - B Tamegão-Lopes
- Centro de Hematologia e Hemoterapia do Estado do Pará, Brasil
| | | | | | - MOG Ishak
- Universidade Federal do Pará, Brasil
| | - R Ishak
- Universidade Federal do Pará, Brasil
| | - JAR Lemos
- Universidade Federal do Pará, Brasil
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Machado LFA, Vallinoto ACR, Souza MIM, Azevedo VN, Ishak MOG, Ishak R. Serological and molecular typing of HIV type 1 infection in the Tiriyo tribe, a native Indian community of the Amazon region of Brazil. AIDS Res Hum Retroviruses 2006; 22:1267-70. [PMID: 17209770 DOI: 10.1089/aid.2006.22.1267] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The seroprevalence and the occurrence of an HIV-1 subtype was assessed in blood samples of the Tiriyo tribe. Antibody was found in 0.6% and the molecular analysis of the pro region detected the emergence of a subtype B for the first time in a native Indian tribe of the Amazon region of Brazil.
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Affiliation(s)
- Luiz F A Machado
- Laboratório de Virologia, Centro de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
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Ishak R, Vallinoto ACR, Azevedo VN, Vicente ACP, Hall WW, Ishak MOG. Molecular evidence for infection by HTLV-2 among individuals with negative serological screening tests for HTLV antibodies. Epidemiol Infect 2006; 135:604-9. [PMID: 16959051 PMCID: PMC2870598 DOI: 10.1017/s0950268806006984] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Previous serological studies on the Arara do Laranjal Indian group revealed extensive HTLV-2 infections. A collection of 97 new samples from the Arara were found repeatedly negative using three different commercial enzyme immunoassays. Eight samples that exhibited optical density readings close to the cut-off value were re-evaluated using Western blot (GeneLab 2.4, Singapore) assay. One sample was found to be non-reactive, five exhibited indeterminate patterns, one was classified as HTLV, and one was confirmed as HTLV-2. Peripheral blood mononuclear cell DNA of the eight samples were subjected to nested PCR and restriction fragment length polymorphism (RFLP) analysis of the pX and env regions, and nucleotide sequencing of the 5'-LTR region. All produced amplification products of pX, but env could be amplified in only one sample with the commonly used primers. RFLP analysis of the pX region using TaqI confirmed HTLV-2 infection. Nucleotide sequencing of the 5'-LTR region was performed in three samples (HTLV-2, HTLV and indeterminate based on Western blot pattern). Phylogenetic analysis of a 449-nt fragment using the Neighbour-Joining method clearly demonstrated that the three samples clustered within the HTLV-2c molecular subtype. The present study confirms the wide dissemination of the HTLV-2c subtype among linguistically and culturally distinct Amazonian Indian groups, and emphasizes the unique occurrence of infection by this subtype in Brazil. Moreover, it emphasizes the limitation of employing the present serological screening assays in blood banks, epidemiological studies, and the importance of molecular assays in the confirmatory procedures for the primary detection of HTLV-2 infections.
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Affiliation(s)
- R Ishak
- Laboratório de Virologia, Centro de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brasil.
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Vallinoto ACR, Pontes GS, Muto NA, Lopes IGL, Machado LFA, Azevedo VN, Carvalhaes FAPL, Santos SEB, Guerreiro JF, Ishak MOG, Ishak R. Identification of human T-cell lymphotropic virus infection in a semi-isolated Afro-Brazilian quilombo located in the Marajó Island (Pará, Brazil). Mem Inst Oswaldo Cruz 2006; 101:103-5. [PMID: 16699718 DOI: 10.1590/s0074-02762006000100020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Antibodies to human T-cell lymphotropic virus-1 and 2 (HTLV-1 and 2) were tested in 259 inhabitants (98 males and 161 females) of four villages of the Marajó Island (Pará, Brazil) using enzyme immunoassays (ELISA and Western blot). Types and subtypes of HTLV were determined by nested polymerase chain reaction (PCR) targeting the pX, env and 5 LTR regions. HTLV-1 infection was detected in Santana do Arari (2.06%) and Ponta de Pedras (1%). HTLV-2 was detected only in Santana do Arari (1.06%). Sequencing of the 5 LTR region of HTLV-1 and the phylogenetic analysis identified the virus as a member of the Cosmopolitan Group, subgroup Transcontinental. Santana do Arari is an Afro-Brazilian community and the current results represent the first report of HTLV-1 infection in a mocambo located in the Brazilian Amazon region.
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Affiliation(s)
- A C R Vallinoto
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil.
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9
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Laurentino RV, Lopes IGL, Azevedo VN, Machado LFA, Moreira MRC, Lobato L, Ishak MOG, Ishak R, Vallinoto ACR. Molecular characterization of human T-cell lymphotropic virus coinfecting human immunodeficiency virus 1 infected patients in the Amazon region of Brazil. Mem Inst Oswaldo Cruz 2005; 100:371-6. [PMID: 16113884 DOI: 10.1590/s0074-02762005000400006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The present work evaluated the epidemiology of human immunodeficiency virus 1/human T-cell lymphotropic virus (HIV-1/HTLV) coinfection in patients living in Belém (state of Pará) and Macapá (state of Amapá), two cities located in the Amazon region of Brazil. A total of 169 blood samples were collected. The sera were tested by enzyme-linked immunosorbent assay to determine the presence of antibodies anti-HTLV-1/2. Confirmation of infection and discrimination of HTLV types and subtypes was performed using a nested polymerase chain reaction targeting the pX and 5' LTR regions, followed by restriction fragment length polymorphism and sequencing analysis. The presence of anti-HTLV1/2 was detected in six patients from Belém. The amplification of the pX region followed by RFLP analysis, demonstrated the presence of HTLV-1 and HTLV-2 infections among two and four patients, respectively. Sequencing HTLV-1 5' LTR indicated that the virus is a member of the Cosmopolitan Group, Transcontinental subgroup. HTLV-2 strains isolated revealed a molecular profile of subtype HTLV-2c. These results are a reflex of the epidemiological features of HIV-1/HTLV-1/2 coinfection in the North region of Brazil, which is distinct from other Brazilian regions, as reported by previous studies.
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Affiliation(s)
- R V Laurentino
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Federal do Pará, 66075-900 Belém, PA, Brazil
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Pontes GS, Tamegão-Lopes B, Machado LFA, Azevedo VN, Ishak MOG, Ishak R, Lemos JAR, Vallinoto ACR. Characterization of Mannose-Binding Lectin Gene Polymorphism Among Human T-Cell Lymphotropic Virus 1 and 2–Infected Asymptomatic Subjects. Hum Immunol 2005; 66:892-6. [PMID: 16216673 DOI: 10.1016/j.humimm.2005.06.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Indexed: 11/24/2022]
Abstract
The present study investigated the association between mannose-binding lectin (MBL) gene polymorphism and the susceptibility to human T-cell lymphotropic virus (HTLV) infection in a group of 83 HTLV-infected asymptomatic subjects (62 HTLV-1 and 21 HTLV-2) and 99 healthy controls. Detection of MBL*A, MBL*B, and MBL*C was performed by amplifying a fragment of 349 bp (exon 1) and submitting the product to restriction fragment length polymorphism analysis with BanI and MboII endonucleases. Allele MBL*D was investigated by sequence-specific primer-polymerase chain reaction. The frequency of MBL*A, MBL*B, and MBL*D was 63%, 22%, and 15% among seropositive subjects and 70%, 14%, and 16% among healthy controls, respectively. Genotype differences were statistically significant (chi2 = 11.57; p = 0.04); the presence of genotype BB was 9.6% among HTLV-infected patients compared with 1% among controls (chi2 = 7.151; p = 0.019). A significant difference of the genotype frequencies between HTLV-1 and HTLV-2 infections was observed, but this result could be attributed to the number of investigated HTLV-1-infected subjects. The odds ratio to the presence of BB genotype was 10.453 (1.279 < or = IC95% < or = 85.40; p = 0.019). Results reveal a strong association between MBL polymorphism and HTLV infection. Presence of genotype BB may be associated with the susceptibility to HTLV, but further studies, with a larger number of individuals, will be necessary. MBL polymorphism could possibly have an impact on diseases associated with HTLV infection.
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Affiliation(s)
- G S Pontes
- Universidade Federal do Pará, Centro de Ciências Biológicas, Departamento de Patologia, Laboratório de Virologia, Guamá, Belém
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