Intrahost and interhost variability of the HIV type 1 nef gene in Brazilian children.

Abstract:

:Many aspects of HIV-1 pathogenesis are affected by Nef protein activity, and efforts have been made to study variation in the nef gene and how that variation relates to disease outcome. We studied the genetic diversity of the nef gene in distinct clones obtained from the same patient (intrahost) and in sequences obtained from different hosts (interhost). The set of sequences analyzed was obtained from HIV-1-infected Brazilian children and contained 112 clones from 25 children (intrahost samples), as well as 55 sequences from epidemiologically unlinked children (interhost samples). We found extensive site polymorphisms and amino acid length variations, mainly in the amino terminal region of the nef gene, between the myristoylation motif (MGxxxS) and the MHC-1 downregulation motif (Rxx). Analysis of the sequences deposited in the Los Alamos HIV sequences database ( www.hiv.lanl.gov ) indicated that the most frequent motif at the MHC-1 downregulation site in the subtype B strain is R(86%)A(64%)E(82%) (n = 1040) and R(78%)T(74%)E(56%) in the subtype C strain (n = 549). Conversely, the Brazilian subtype B isolates presented the motif R(81%)T(62%)E(67%) at this site (n = 64). A detailed analysis of selective pressures identified a concentration of codons under strong positive selection in the amino terminal region of the nef gene. We also determined that different sites are under positive selection in the subtype B and subtype C viruses. The amino acid composition in the MHC-1 downregulation motif of the nef gene in our sequences may indicate a distinct adaptive pattern of HIV-1 subtype B to the Brazilian host population.

authors

Cavalieri E,Florido C,Leal E,Machado DM,Camargo M,Diaz RS,Janini LM

doi

10.1089/aid.2009.0061

subject

Has Abstract

pub_date

2009-11-01 00:00:00

pages

1129-40

issue

11

eissn

0889-2229

issn

1931-8405

journal_volume

25

pub_type

杂志文章
  • Prevalence of drug-resistant HIV type 1 at the time of initiation of antiretroviral therapy in Portland, Oregon.

    abstract::The presence of transmitted drug-resistant HIV-1 (TDR) at the time of antiretroviral therapy (ART) initiation is associated with failure to achieve viral load suppression. Rates of TDR in ART-naive patients have been reported from various parts of the world through ongoing national, regional, and global evaluations; h...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2011.0386

    authors: MacVeigh MS,Kosmetatos MK,McDonald JE,Reeder JL,Parrish DA,Young TP

    更新日期:2013-02-01 00:00:00

  • 9-Nitrocamptothecin inhibits tumor recrosis factor-mediated activation of human immunodeficiency virus type 1 and enhances apoptosis in a latently infected T cell clone.

    abstract::Transition from latency to active replication is a crucial stage for the process of human immunodeficiency virus type 1 (HIV-1) infection and life cycle. HIV-1 replication in latently infected cells can be strongly induced by the cytokine tumor necrosis factor alpha (TNF-alpha) and the proliferation-arresting chemical...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1998.14.39

    authors: Moulton S,Pantazis P,Epstein JS,Sadaie MR

    更新日期:1998-01-01 00:00:00

  • Distinct populations of human immunodeficiency virus type 1 in blood and cerebrospinal fluid.

    abstract::The nucleotide sequence of the gp41 transmembrane protein coding region of human immunodeficiency virus type 1 (HIV-1) proviral DNA obtained from blood and cerebrospinal fluid (CSF) from 6 individuals was determined by direct sequencing of polymerase chain reaction (PCR)-amplified DNA. The direct sequencing approach w...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1992.8.53

    authors: Steuler H,Storch-Hagenlocher B,Wildemann B

    更新日期:1992-01-01 00:00:00

  • Helper and cytotoxic T cell responses of HIV type 1-infected individuals to synthetic peptides of HIV type 1 Rev.

    abstract::In cell-mediated immunity T cells recognize peptide fragments of the antigenic protein in association with major histocompatibility complex (MHC) proteins. Synthetic 9- to 16-mer peptides have been widely used to identify the region(s) of a protein that act as T cell epitope. Here, we report antigenic peptides identif...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1995.11.1335

    authors: Blazevic V,Ranki A,Krohn KJ

    更新日期:1995-11-01 00:00:00

  • Expression of latent HIV induced by the potent HDAC inhibitor suberoylanilide hydroxamic acid.

    abstract::Histone deacetylases (HDACs) act on histones within the nucleosome-bound promoter of human immunodeficiency virus type 1 (HIV-1) to maintain proviral latency. HDAC inhibition leads to promoter expression and the escape of HIV from latency. We evaluated the ability of the potent inhibitor recently licensed for use in o...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2008.0191

    authors: Archin NM,Espeseth A,Parker D,Cheema M,Hazuda D,Margolis DM

    更新日期:2009-02-01 00:00:00

  • Characterization of human immunodeficiency virus type 1 from a previously unexplored region of South Africa with a high HIV prevalence.

    abstract::HIV prevalence in the Limpopo Province has increased rapidly within the past 10 years, as in other parts of South Africa. Little is known about the genetic and biological properties of HIV circulating in this region including the baseline drug resistance profiles. We therefore collected blood samples from 42 HIV-1-inf...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2005.21.103

    authors: Bessong PO,Larry Obi C,Cilliers T,Choge I,Phoswa M,Pillay C,Papathanasopoulos M,Morris L

    更新日期:2005-01-01 00:00:00

  • Genotypic characterization and comparison of full-length envelope glycoproteins from South African HIV type 1 subtype C primary isolates that utilize CCR5 and/or CXCR4.

    abstract::CCR5 has preferentially been used by all circulating HIV-1 subtype C viruses for cell entry. Recently, we reported the highest proportion of CXCR4-utilizing primary isolates among a cohort of 20 South African AIDS patients. This study describes and compares the Env genotypic characteristics from these 20 HIV-1 subtype...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2007.0304

    authors: Michler K,Connell BJ,Venter WD,Stevens WS,Capovilla A,Papathanasopoulos MA

    更新日期:2008-05-01 00:00:00

  • Dynamics of T cells subsets and lymphoproliferative responses during structured treatment interruption cycles and after definitive interruption of HAART in early chronic HIV type-1-infected patients.

    abstract::Little is known about the consequences of short cycles of structured treatment interruption or definitive interruption of HAART for both T cell subset dynamics and T lymphoproliferative responses (LPR). Immunological follow-up was performed in 45 early chronical HIV-1-infected patients during short STI cycles during t...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2006.22.657

    authors: Libois A,López A,Garcia F,Castro P,Maleno MJ,García A,Climent N,Arnedo M,Gallart T,Gatell JM,Plana M

    更新日期:2006-07-01 00:00:00

  • Gag-specific immune responses after immunization with p17/p24:Ty virus-like particles in HIV type 1-seropositive individuals.

    abstract::Gag-specific immune responses and changes in HIV-1 RNA levels were evaluated in eight HIV-1-infected persons, in order to assess the immunotherapeutic potential HIV-1 p17/p24: Ty virus-like particles (p24-VLP). All treated subjects showed transient and dose-dependent proliferative responses to the Ty-VLP carrier (stim...

    journal_title:AIDS research and human retroviruses

    pub_type: 临床试验,杂志文章,多中心研究

    doi:10.1089/aid.1997.13.393

    authors: Klein MR,Veenstra J,Holwerda AM,Roos MT,Gow I,Patou G,Coutinho RA,De Wolf F,Miedema F

    更新日期:1997-03-20 00:00:00

  • Prevalence and Risk Factors for Human Immunodeficiency Virus Infection Among Female Sex Workers: Distinct Offers of Sexual Services in a Municipality of the Brazilian Amazon.

    abstract::This study determined the prevalence of human immunodeficiency virus (HIV) infection and its associated factors in female sex workers (FSWs) from the municipality of Bragança in the state of Pará, Brazil. A cross-sectional study using a respondent-driven sampling method was used to investigate 137 FSWs. They were inte...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2019.0032

    authors: da Costa LM,Raiol NC,Lisboa BLA,Frade PCR,Blandtt LDS,Silva-Oliveira GC,Machado LFA,Martins LC,Oliveira-Filho AB

    更新日期:2019-09-01 00:00:00

  • Tax gene characterization of human T-lymphotropic virus type 1 strains from Brazilian HIV-coinfected patients.

    abstract::The tax gene of human T-lymphotropic virus type 1 (HTLV-1) diverges among isolates according to geographic regions and has been classified into two genotypes: taxA and taxB. In Brazil, taxA is the most prevalent genotype in symptomatic and asymptomatic carriers. Few studies have been conducted in HIV-infected patients...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2011.0389

    authors: Magri MC,Brigido LF,Rodrigues R,Morimoto HK,Caterino-de-Araujo A

    更新日期:2012-12-01 00:00:00

  • Full-length genome sequencing of HIV type 1 group O viruses isolated from a heterosexual transmission cluster in Senegal.

    abstract::In a polygamous marriage in Senegal, the husband and his two spouses were infected with HIV-1 group O. This study provides new full-length genome sequences for the two spouses (99SE-MP1299 and 99SE-MP1300) and the 3'-end LTR-tat fragment (6084 bp) for the husband (98SE-42HALD). Phylogenetic tree and diversity plot ana...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/088922201316912817

    authors: Kane CT,Montavon C,Toure MA,Faye MA,Ndiaye AG,Diallo AG,Ndoye I,Liegeois F,Delaporte E,Mboup S,Peeters M

    更新日期:2001-08-10 00:00:00

  • Human monoclonal antibody against a gag-coded protein of human immunodeficiency virus produced by a stable EBV-transformed cell clone.

    abstract::An EBV-transformed lymphoblastoid B cell clone (A12) derived from peripheral blood lymphocytes of an HIV-1-infected individual is described. The immunoglobulin isotype produced by this clone was IgM, and Southern blot analysis of immunoglobulin gene rearrangement showed a monoclonal pattern. The A12 monoclonal antibod...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1989.5.73

    authors: Amadori A,Ciminale V,Calabro ML,Tessarollo L,Francavilla E,Chieco-Bianchi L

    更新日期:1989-02-01 00:00:00

  • Immunological and chemical analysis of P6, the carboxyl-terminal fragment of HIV P15.

    abstract::The first open reading frame of the HIV genome has been identified as the gag gene. The proteins encoded by this gene are p17 as the amino-terminal protein, p24 as the middle peptide, and p15 as the carboxyl-terminal end. A monoclonal antibody recognizing an antigenic determinant on a fragment of p15 has been develope...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1987.3.253

    authors: Veronese FD,Rahman R,Copeland TD,Oroszlan S,Gallo RC,Sarngadharan MG

    更新日期:1987-10-01 00:00:00

  • Investigation of proviral load in individuals infected with human T-lymphotropic virus type II.

    abstract::Human T-lymphotrophic virus type II (HTLV-II) has not yet been associated with any disease. Little is known about the proviral loads of HTLV-II in vivo and its relationship, if any, to lack of pathogenicity. We determined the HTLV-II proviral copy number in peripheral blood lymphocyte (PBL) samples from 49 HTLV-II-inf...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1995.11.1235

    authors: Woods TC,Graber JM,Hershow RC,Khabbaz RF,Kaplan JE,Heneine W

    更新日期:1995-10-01 00:00:00

  • An interactive Web site providing major histocompatibility ligand predictions: application to HIV research.

    abstract::EpiMatrix/HIV, a tool that is currently available on the World Wide Web, enables researchers to screen HIV proteins for potential MHC ligands. We have performed a comparison of EpiMatrix predictions to 158 published allotype-specific HLA-associated peptides (MHC ligands) derived from 133 proteins. The top 10 ranked Ep...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1997.13.529

    authors: De Groot AS,Jesdale BM,Szu E,Schafer JR,Chicz RM,Deocampo G

    更新日期:1997-05-01 00:00:00

  • Identification of mutations in proviral long terminal repeats of HIV type 1-infected subjects naive to drug therapy.

    abstract::Human immunodeficiency virus type 1 (HIV-1) proviral DNA sequences in the 5' long terminal repeat (LTR) were examined among 28 drug-naive individuals. Twenty-four subjects had highly conserved LTR sequences, however, more significant changes were observed in the remaining four LTR sequences. These included a 9-bp dele...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2004.20.1019

    authors: Copeland KF,Chen Z,Fiebig M,Ni L,Savoy S,Smaill FM,Rosenthal KL,Kim JE

    更新日期:2004-09-01 00:00:00

  • Short communication: persistence of high blood levels of the chemokines CCL2, CCL19, and CCL20 during the course of HIV infection.

    abstract::Dendritic cells (DCs) are important mediators of the immune response against HIV and yet blood DC numbers fall substantially during HIV infection. Here we report that blood levels of the DC-tissue tropic chemokines monocyte chemotactic protein (MCP-1/CCL2), macrophage inflammatory proteins (MIP-3α/CCL20), and MIP-3β/C...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2010.0261

    authors: Fontaine J,Poudrier J,Roger M

    更新日期:2011-06-01 00:00:00

  • Predominance of three NF-kappaB binding sites in the long terminal repeat region of HIV Type 1 subtype C isolates from Zambia.

    abstract::Human immunodeficiency virus type-1 (HIV-1) is a leading cause of mortality and morbidity in the world, with almost 46 million people infected globally. HIV-1 subtype C accounts for 55% of these infections. In Zambia, the majority of HIV-1 infections are subtype C. However, to its north most countries have non-subtype...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2005.21.901

    authors: Munkanta M,Handema R,Kasai H,Gondwe C,Deng X,Yamashita A,Asagi T,Yamamoto N,Ito M,Kasolo F,Terunuma H

    更新日期:2005-10-01 00:00:00

  • Neutralization patterns and evolution of sequential HIV type 1 envelope sequences in HIV type 1 subtype B-infected drug-naive individuals.

    abstract::To design a vaccine that will remain potent against HIV-1, the immunogenic regions in the viral envelope that tend to change as well as those that remain constant over time must be identified. To determine the neutralization profiles of sequential viruses over time and study whether neutralization patterns correlate w...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2008.0154

    authors: Nyambi P,Burda S,Urbanski M,Heyndrickx L,Janssens W,Vanham G,Nadas A

    更新日期:2008-12-01 00:00:00

  • Recombinant polypeptides from the human immunodeficiency virus reverse transcriptase define three epitopes recognized by antibodies in sera from patients with acquired immunodeficiency syndrome.

    abstract::Eight fragments derived from the HIV-1 pol gene were expressed as recombinant polypeptides in Escherichia coli. The fragments were from the portion of the pol gene that encodes the reverse transcriptase. The expressed peptides were analyzed immunologically with sera from HIV-1-infected individuals. Three distinct immu...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1989.5.61

    authors: Padberg C,Nowlan S,Mermer B

    更新日期:1989-02-01 00:00:00

  • Comparison of once-daily fosamprenavir boosted with either 100 or 200 mg of ritonavir, in combination with abacavir/lamivudine: 96-week results from COL100758.

    abstract::The long-term efficacy of once-daily (qd) fosamprenavir (FPV) 1400 mg boosted by ritonavir 100 mg (FPV/r100) has not been evaluated previously. A 96-week open-label, randomized, multicenter study compared the efficacy/safety of FPV/r100 with FPV 1400 mg boosted by ritonavir 200 mg qd (FPV/r200), plus abacavir/lamivudi...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,多中心研究,随机对照试验

    doi:10.1089/aid.2008.0231

    authors: Hicks CB,DeJesus E,Sloan LM,Sension MG,Wohl DA,Liao Q,Ross LL,Pakes GE,Pappa KA,Lancaster CT,COL100758 Study Team.

    更新日期:2009-04-01 00:00:00

  • Mechanisms of protection induced by attenuated simian immunodeficiency virus. II. Lymphocyte depletion does not abrogate protection.

    abstract::To determine the role that cellular immune responses play in the protection conferred by vaccination with attenuated SIVmac32H (pC8), we have attempted to deplete macaques of their CD8+ cells prior to challenge with wild-type SIVmac32H (pJ5). In two of four pC8-infected macaques, N109 and N112, a transient partial dep...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1998.14.1187

    authors: Stebbings R,Stott J,Almond N,Hull R,Lines J,Silvera P,Sangster R,Corcoran T,Rose J,Cobbold S,Gotch F,McMichael A,Walker B

    更新日期:1998-09-01 00:00:00

  • New insights into the origin of the HIV type 1 subtype A epidemic in former Soviet Union's countries derived from sequence analyses of preepidemically transmitted viruses.

    abstract::The HIV-1 subtype A epidemic affecting injecting drug users (IDU) in former Soviet Union (FSU) countries started dramatically in Odessa, southern Ukraine, in 1995, and is caused by a variant of monophyletic origin, often designated IDU-A. We phylogenetically analyzed one near full-length genome and two partial sequenc...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2007.0166

    authors: Thomson MM,de Parga EV,Vinogradova A,Sierra M,Yakovlev A,Rakhmanova A,Delgado E,Casado G,Muñoz M,Carmona R,Vega Y,Pérez-Alvarez L,Contreras G,Medrano L,Osmanov S,Nájera R

    更新日期:2007-12-01 00:00:00

  • Human foamy virus DNA forms and expression in persistently infected Dami megakaryocytic cells.

    abstract::We have characterized human foamy virus (HFV) proviral DNA and determined HFV expression in a persistent infection model, the Dami megakaryocytic cell line. Molecular studies were performed on parental persistently infected cells (Dami-P), as well as on derived clones (Dami-Cl). We report that in these nonlytic and no...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1995.11.829

    authors: Wybier-Franqui J,Tobaly-Tapiero J,Coronel A,Giron ML,Chopin-Robert C,Peries J,Emanoil-Ravier R

    更新日期:1995-07-01 00:00:00

  • Young pregnant women living with HIV/AIDS in Criciuma, Southern Brazil, are infected almost exclusively with HIV type 1 clade C.

    abstract::Southern Brazil has the highest prevalence rate of AIDS in the country and is the only region in the Americas where HIV-1 C prevails. Metropolitan areas and harbor cities have been evaluated, but limited information is available for small towns and specific populations. We studied women attending the obstetric outpati...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2009.0214

    authors: Rodrigues R,Manenti S,Romao PR,de Paula Ferreira JL,Batista JP,Siqueira AF,de Macedo Brigido LF

    更新日期:2010-03-01 00:00:00

  • Short communication: T cell activation in HIV-1/herpes simplex virus-2-coinfected Kenyan women receiving valacyclovir.

    abstract::Herpes simplex virus-2 (HSV-2) suppression with acyclovir or valacyclovir reduces HIV-1 viral RNA levels; one hypothesis is that HSV-2 suppression reduces immune activation. We measured T cell immune activation markers among women participating in a randomized placebo-controlled trial of valacyclovir to reduce HIV-1 R...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,随机对照试验

    doi:10.1089/AID.2012.0071

    authors: Roxby AC,Liu AY,Drake AL,Kiarie JN,Richardson B,Lohman-Payne BL,John-Stewart GC,Wald A,De Rosa S,Farquhar C

    更新日期:2013-01-01 00:00:00

  • Identification of human immunodeficiency virus type 1 glycoprotein gp120/gp41 interacting sites by the idiotypic mimicry of two monoclonal antibodies.

    abstract::A sequence of four amino acid residues amino-terminal to the only intramolecular disulphide bond of the human immunodeficiency virus type 1 (HIV-1) transmembrane protein gp41 is recognized by an anti-idiotypic antibody (9G5A) raised against another monoclonal antibody (M38), which recognizes the C5 region of gp120. 9G...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1993.9.33

    authors: Lopalco L,Longhi R,Ciccomascolo F,De Rossi A,Pelagi M,Andronico F,Moore JP,Schulz T,Beretta A,Siccardi AG

    更新日期:1993-01-01 00:00:00

  • Nucleotide sequence analysis of isolates of human T-lymphotropic virus type 1 of diverse geographical origins.

    abstract::Nucleotide sequences for long terminal repeat (LTR), gag, the protease gene, and pol of a human T-lymphotropic virus type 1 (HTLV-1) isolate of probable Caribbean origin (HTLV-1CH) and a Zairian isolate (HTLV-1EL) were determined providing complete proviral sequences for these isolates. These sequences were compared w...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1991.7.923

    authors: Ratner L,Philpott T,Trowbridge DB

    更新日期:1991-11-01 00:00:00

  • Activation and regulation of interferon regulatory factor 4 in HTLV type 1-infected T lymphocytes.

    abstract::The human T cell leukemia virus type 1 (HTLV-1) is the etiologic agent of adult T cell leukemia (ATL), an aggressive and fatal leukemia of CD4(+) T lymphocytes, and is also associated with a neurological demyelinating disease, tropical spastic paraparesis. The oncogenic potential of HTLV-1 resides in the 353-aa, 40-kD...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/08892220050193047

    authors: Sharma S,Mamane Y,Grandvaux N,Bartlett J,Petropoulos L,Lin R,Hiscott J

    更新日期:2000-11-01 00:00:00