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Queiroz MAF, de Oliveira AQT, Moura TCF, Brito WRDS, Santana EGM, de Lima LLP, Lopes FT, Bichara CDA, Amoras EDSG, Ishak R, Vallinoto IMVC, Vallinoto ACR. The Expression Levels of TREX1 and IFN-α Are Associated with Immune Reconstitution in HIV-1-Infected Individuals. Viruses 2024; 16:499. [PMID: 38675842 PMCID: PMC11054413 DOI: 10.3390/v16040499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/21/2024] [Accepted: 03/22/2024] [Indexed: 04/28/2024] Open
Abstract
TREX1 acts in the initial prevention of an autoimmune response, but it may contribute to the permissiveness of retrovirus infections. This study investigated the association between the levels of TREX1 gene expression with the polymorphisms TREX1 rs3135941 (T/C) and TREX1 rs3135945 (G/A), and the presence of antinuclear antibodies (ANA) in antiretroviral therapy (ART)-naïve individuals and after 1 year of treatment. Blood samples from 119 individuals with HIV-1 were subjected to genotyping of polymorphisms and quantification of TREX1 gene expression and HIV-1 viral load by qPCR. The concentration of IFN-α and the number of CD4+/CD8+ T lymphocytes were determined by ELISA and flow cytometry, respectively; ANA was investigated by immunofluorescence. A control group of 167 seronegative individuals was used for the comparison of genotypic frequencies. The frequency of the polymorphisms were not associated with HIV infection or with variations in the expression of TREX1 and IFN-α (p > 0.05). ART-naïve individuals exhibited higher TREX1 expression and lower IFN-α expression. After 1 year of ART, TREX1 levels were reduced, while IFN-α and CD4+ T lymphocytes were elevated (p < 0.05). Some individuals on ART presented ANA. These results suggest that ART-mediated restoration of immune competence is associated with a reduction in TREX1 expression, which may induce the development of ANA, regardless of the polymorphism investigated.
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Affiliation(s)
- Maria Alice Freitas Queiroz
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
| | - Allysson Quintino Tenório de Oliveira
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
| | - Tuane Carolina Ferreira Moura
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
| | - Wandrey Roberto dos Santos Brito
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
| | - Emmanuelle Giuliana Mendes Santana
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Lorena Leticia Peixoto de Lima
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Felipe Teixeira Lopes
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
| | - Carlos David Araújo Bichara
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Ednelza da Silva Graça Amoras
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Ricardo Ishak
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Izaura Maria Vieira Cayres Vallinoto
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
| | - Antonio Carlos Rosário Vallinoto
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66.075-110, PA, Brazil; (A.Q.T.d.O.); (T.C.F.M.); (W.R.d.S.B.); (E.G.M.S.); (L.L.P.d.L.); (F.T.L.); (C.D.A.B.); (E.d.S.G.A.); (R.I.); (I.M.V.C.V.); (A.C.R.V.)
- Graduate Program in Biology of Infectious and Parasitic Agents, Federal University of Pará, Belém 66.075-110, PA, Brazil
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Tohidi N, Manshadi SAD, Hajiabdolbaghi M. Association of TREX1 polymorphism with disease progression in human immunodeficiency virus type-1 (HIV-1) infected patients. Virus Genes 2023; 59:831-835. [PMID: 37728706 DOI: 10.1007/s11262-023-02032-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023]
Abstract
The time interval between HIV-1 infection and AIDS development is not the same in all patients and depends largely on the genetic background of the individual. Polymorphisms in the TREX1 gene, the main enzyme in the clearance of cytosolic DNA, affect type 1 interferon-mediated inflammatory response in HIV-1 infection. We aimed to study the role of a single nucleotide polymorphism (rs3135941) of the TREX1 gene and the rate of disease progression in patients infected with HIV-1. A total of 190 HIV-1 infected patients were recruited. Patients' demographic and laboratory data including CD4 counts, viral load, and antiretroviral therapy (ART) were collected. The genotype of rs3135941 was determined by a PCR-SSP method. The rate of progression to AIDS was calculated with Kaplan-Meier survival analysis using Stata software. The patients were divided into rapid and slow progressors based on time interval of CD4 drop below 350/µl. Kaplan-Meier analysis revealed an accelerated disease progression in patients with TC and CC genotypes (HR = 1.49, 95% CI = 1.01-2.17). The mean values of the first 5-year CD4 counts were significantly different in patients who had CC and TC genotypes compared to the TT group (p = 0.036). The result of this study emphasizes the importance of TREX1 polymorphism in HIV-1 progression. These data warrant further investigation into the role of other polymorphisms of TREX1.
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Affiliation(s)
- Nastaran Tohidi
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, 1419733141, Iran
| | - Seyed Ali Dehghan Manshadi
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, 1419733141, Iran
| | - Mahboubeh Hajiabdolbaghi
- Department of Infectious Diseases and Tropical Medicine, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, 1419733141, Iran.
- Iranian Research Center of HIV/AIDS, Iranian Institute for Reduction of High-Risk Behaviors, Tehran University of Medical Sciences, Tehran, Iran.
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Queiroz MAF, Moura TCF, Bichara CDA, Lima LLPD, Oliveira AQTD, Souza RGD, Gomes STM, Amoras EDSG, Vallinoto ACR. TREX1 531C/T Polymorphism and Autoantibodies Associated with the Immune Status of HIV-1-Infected Individuals. Int J Mol Sci 2023; 24:ijms24119660. [PMID: 37298611 DOI: 10.3390/ijms24119660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Autoimmune diseases can develop during HIV-1 infection, mainly related to the individual's immune competence. The study investigated the association of the TREX1 531C/T polymorphism and antinuclear antibodies (ANA) in HIV-1 infection and the time of antiretroviral therapy (ART) used. Cross-sectional and longitudinal assessments were carried out in 150 individuals, divided into three groups: ART-naïve, 5 years and 10 years on ART; ART-naïve individuals were evaluated for 2 years after initiation of treatment. The individuals' blood samples were submitted to indirect immunofluorescence tests, real-time PCR and flow cytometry. The TREX1 531C/T polymorphism was associated with higher levels of TCD4+ lymphocytes and IFN-α in individuals with HIV-1. Individuals on ART had a higher frequency of ANA, higher levels of T CD4+ lymphocytes, a higher ratio of T CD4+/CD8+ lymphocytes and higher levels of IFN-α than therapy-naïve individuals (p < 0.05). The TREX1 531C/T polymorphism was associated with better maintenance of the immune status of individuals with HIV-1 and ANA with immune restoration in individuals on ART, indicating the need to identify individuals at risk of developing an autoimmune disease.
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Affiliation(s)
- Maria Alice Freitas Queiroz
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
- Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
| | - Tuane Carolina Ferreira Moura
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
- Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
| | - Carlos David Araújo Bichara
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
- Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
| | | | - Allysson Quintino Tenório de Oliveira
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
- Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
| | - Ranilda Gama de Souza
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
| | | | | | - Antonio Carlos Rosário Vallinoto
- Laboratory of Virology, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
- Graduate Program in Biology of Infectious and Parasitic Agents, Institute of Biological Sciences, Federal University of Pará, Belém 66075-110, Brazil
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Hu J, Tang L, Cheng J, Zhou T, Li Y, Chang J, Zhao Q, Guo JT. Hepatitis B virus nucleocapsid uncoating: biological consequences and regulation by cellular nucleases. Emerg Microbes Infect 2021; 10:852-864. [PMID: 33870849 PMCID: PMC8812769 DOI: 10.1080/22221751.2021.1919034] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Upon infection of hepatocyte, Hepatitis B virus (HBV) genomic DNA in nucleocapsid is transported into the nucleus and converted into a covalently closed circular (ccc) DNA to serve as the template for transcription of viral RNAs. Viral DNA in the cytoplasmic progeny nucleocapsid is another resource to fuel cccDNA amplification. Apparently, nucleocapsid disassembly, or viral genomic DNA uncoating, is an essential step for cccDNA synthesis from both de novo infection and intracellular amplification pathways, and has a potential to activate DNA sensors and induce an innate immune response in infected hepatocytes. However, where and how the nucleocapsid disassembly occurs is not well understood. The work reported herein showed that the enhanced disassembly of progeny mature nucleocapsids in the cytoplasm supported cccDNA intracellular amplification, but failed to activate the cGAS-STING-mediated innate immune response in hepatocytes. Interestingly, while expression of a cytoplasmic exonuclease TREX1 in human hepatoma cells supporting HBV replication significantly reduced the amounts of cccDNA as well as its precursor, deproteinized relaxed circular (rc) DNA, expression of TREX1 in sodium taurocholate cotransporting polypeptide-expressing human hepatoma cells did not inhibit cccDNA synthesis from de novo HBV infection. The results from this cytoplasmic nuclease protection assay imply that the disassembly of progeny mature nucleocapsids and removal of viral DNA polymerase covalently linked to the 5′ end of minus strand of rcDNA take place in the cytoplasm. On the contrary, the disassembly of virion-derived nucleocapsids during de novo infection may occur at a different subcellular compartment and possibly via distinct mechanisms.
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Affiliation(s)
- Jin Hu
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA.,Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Liudi Tang
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA.,Microbiology and Immunology Graduate Program, Drexel University College of Medicine, Philadelphia, PA, USA
| | - Junjun Cheng
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA
| | - Tianlun Zhou
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA
| | - Yuhuan Li
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Jinhong Chang
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA
| | - Qiong Zhao
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA
| | - Ju-Tao Guo
- Department of Experimental Medicine, Baruch S. Blumberg Institute, Doylestown, PA, USA
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TREX1 531C>T Polymorphism is Associated with High Proviral Load Levels in HTLV-1-Infected Persons. Viruses 2019; 12:v12010007. [PMID: 31861565 PMCID: PMC7019804 DOI: 10.3390/v12010007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/26/2019] [Accepted: 11/28/2019] [Indexed: 02/06/2023] Open
Abstract
Human T-lymphotropic virus type 1 (HTLV-1) deregulates the immune system and cell cycle, resulting in loss of immune tolerance and disease, including HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Three prime repair exonuclease 1 (TREX1) maintains innate immune tolerance of the host and host-cell permissiveness to retroviral infections. TREX1 polymorphisms may influence the course of infection and autoimmune manifestations. The influence of TREX1 531C/T polymorphism was investigated in HTLV-1 infection and development of symptoms among 151 persons infected with HTLV-1 (32 HAM/TSP, 19 rheumatologic manifestations, two dermatitis, five more than one diagnosis, two probable HAM/TSP, and 91 asymptomatic individuals) and 100 uninfected persons in the control group. Polymorphism genotyping and proviral load quantification were performed by real-time polymerase chain reaction (PCR) and antinuclear antibodies (ANAs) were screened by an indirect immunofluorescence assay. No statistically significant difference was found in polymorphism genotype and allele frequencies between the infected and control groups. HAM/TSP patients showed higher frequency of TT genotype than asymptomatic persons (p = 0.0339). Proviral load was significantly higher among individuals with CT/TT genotypes and CC genotype carriers had lower proviral load and higher levels of proinflammatory cytokines. ANAs were present only in the HAM/TSP group. TREX1 531C>T polymorphism seems to be associated with TREX-1 regulation and HTLV-1 infection.
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Matz KM, Guzman RM, Goodman AG. The Role of Nucleic Acid Sensing in Controlling Microbial and Autoimmune Disorders. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2018; 345:35-136. [PMID: 30904196 DOI: 10.1016/bs.ircmb.2018.08.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Innate immunity, the first line of defense against invading pathogens, is an ancient form of host defense found in all animals, from sponges to humans. During infection, innate immune receptors recognize conserved molecular patterns, such as microbial surface molecules, metabolites produces during infection, or nucleic acids of the microbe's genome. When initiated, the innate immune response activates a host defense program that leads to the synthesis proteins capable of pathogen killing. In mammals, the induction of cytokines during the innate immune response leads to the recruitment of professional immune cells to the site of infection, leading to an adaptive immune response. While a fully functional innate immune response is crucial for a proper host response and curbing microbial infection, if the innate immune response is dysfunctional and is activated in the absence of infection, autoinflammation and autoimmune disorders can develop. Therefore, it follows that the innate immune response must be tightly controlled to avoid an autoimmune response from host-derived molecules, yet still unencumbered to respond to infection. In this review, we will focus on the innate immune response activated from cytosolic nucleic acids, derived from the microbe or host itself. We will depict how viruses and bacteria activate these nucleic acid sensing pathways and their mechanisms to inhibit the pathways. We will also describe the autoinflammatory and autoimmune disorders that develop when these pathways are hyperactive. Finally, we will discuss gaps in knowledge with regard to innate immune response failure and identify where further research is needed.
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Affiliation(s)
- Keesha M Matz
- School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, United States
| | - R Marena Guzman
- School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, United States
| | - Alan G Goodman
- School of Molecular Biosciences, College of Veterinary Medicine, Washington State University, Pullman, WA, United States; Paul G. Allen School for Global Animal Health, College of Veterinary Medicine, Washington State University, Pullman, WA, United States.
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Ellwanger JH, Zambra FMB, Guimarães RL, Chies JAB. MicroRNA-Related Polymorphisms in Infectious Diseases-Tiny Changes With a Huge Impact on Viral Infections and Potential Clinical Applications. Front Immunol 2018; 9:1316. [PMID: 29963045 PMCID: PMC6010531 DOI: 10.3389/fimmu.2018.01316] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/28/2018] [Indexed: 12/11/2022] Open
Abstract
MicroRNAs (miRNAs) are single-stranded sequences of non-coding RNA with approximately 22 nucleotides that act posttranscriptionally on gene expression. miRNAs are important gene regulators in physiological contexts, but they also impact the pathogenesis of various diseases. The role of miRNAs in viral infections has been explored by different authors in both population-based as well as in functional studies. However, the effect of miRNA polymorphisms on the susceptibility to viral infections and on the clinical course of these diseases is still an emerging topic. Thus, this review will compile and organize the findings described in studies that evaluated the effects of genetic variations on miRNA genes and on their binding sites, in the context of human viral diseases. In addition to discussing the basic aspects of miRNAs biology, we will cover the studies that investigated miRNA polymorphisms in infections caused by hepatitis B virus, hepatitis C virus, human immunodeficiency virus, Epstein–Barr virus, and human papillomavirus. Finally, emerging topics concerning the importance of miRNA genetic variants will be presented, focusing on the context of viral infectious diseases.
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Affiliation(s)
- Joel Henrique Ellwanger
- Laboratório de Imunobiologia e Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Francis Maria Báo Zambra
- Laboratório de Imunobiologia e Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Rafael Lima Guimarães
- Departamento de Genética, Universidade Federal do Pernambuco (UFPE), Recife, Brazil.,Laboratório de Imunopatologia Keizo Asami (LIKA), Universidade Federal de Pernambuco (UFPE), Recife, Brazil
| | - José Artur Bogo Chies
- Laboratório de Imunobiologia e Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Kolar GR, Kothari PH, Khanlou N, Jen JC, Schmidt RE, Vinters HV. Neuropathology and genetics of cerebroretinal vasculopathies. Brain Pathol 2015; 24:510-8. [PMID: 25323666 DOI: 10.1111/bpa.12178] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 12/12/2022] Open
Abstract
Cerebroretinal vasculopathy (CRV) and the related diseases hereditary endotheliopathy with retinopathy, neuropathy, and stroke (HERNS), hereditary vascular retinopathy (HVR) and hereditary systemic angiopathy (HSA) [subsequently combined as retinovasculopathy and cerebral leukodystrophy (RVCL)] are devastating autosomal-dominant disorders of early to middle-age onset presenting with a core constellation of neurologic and ophthalmologic findings. This family of diseases is linked by specific mutations targeting a core region of a gene. Frameshift mutations in the carboxyl-terminus of three prime exonuclease-1 (TREX1), the major mammalian 3' to 5' DNA exonuclease on chromosome 3p21.1-p21.3, result in a systemic vasculopathy that follows an approximately 5-year course leading to death secondary to progressive neurologic decline, with sometimes a more protracted course in HERNS. Neuropathological features include a fibrinoid vascular necrosis or thickened hyalinized vessels associated with white matter ischemia, necrosis and often striking dystrophic calcifications. Ultrastructural studies of the vessel walls often demonstrate unusual multilaminated basement membranes.
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Affiliation(s)
- Grant R Kolar
- Department of Pathology, Saint Louis University School of Medicine, St. Louis, MO
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Hasan M, Yan N. Safeguard against DNA sensing: the role of TREX1 in HIV-1 infection and autoimmune diseases. Front Microbiol 2014; 5:193. [PMID: 24817865 PMCID: PMC4012220 DOI: 10.3389/fmicb.2014.00193] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 04/11/2014] [Indexed: 12/14/2022] Open
Abstract
Innate immune recognition is crucial for host responses against viral infections, including infection by human immunodeficiency virus 1 (HIV-1). Human cells detect such invading pathogens with a collection of pattern recognition receptors that activate the production of antiviral proteins, such as the cytokine interferon-type I, to initiate antiviral responses immediately as well as the adaptive immune response for long-term protection. To establish infection in the host, many viruses have thus evolved strategies for subversion of these mechanisms of innate immunity. For example, acute infection by HIV-1 and other retroviruses have long been thought to be non-immunogenic, signifying suppression of host defenses by these pathogens. Studies in the past few years have begun to uncover a multifaceted scheme of how HIV-1 evades innate immune detection, especially of its DNA, by exploiting host proteins. This review will discuss the host mechanisms of HIV-1 DNA sensing and viral immune evasion, with a particular focus on TREX1, three prime repair exonuclease 1, a host 3′ exonuclease (also known as DNase III).
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Affiliation(s)
- Maroof Hasan
- Department of Internal Medicine, University of Texas Southwestern Medical Center Dallas, TX, USA ; DDepartment of Microbiology, University of Texas Southwestern Medical Center Dallas, TX, USA
| | - Nan Yan
- Department of Internal Medicine, University of Texas Southwestern Medical Center Dallas, TX, USA ; DDepartment of Microbiology, University of Texas Southwestern Medical Center Dallas, TX, USA
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