HIV Type 1 Nef is released from infected cells in CD45(+) microvesicles and is present in the plasma of HIV-infected individuals.

Abstract:

:HIV-1 Nef has been demonstrated to be integral for viral persistence, infectivity, and the acceleration of disease pathogenesis (AIDS) in humans. Nef has also been detected in the plasma of HIV-infected individuals and is released from infected cells. The form in which Nef is released from infected cells is unknown. However, Nef is a myristoylated protein and has been shown to interact with the intracellular vesicular trafficking network. Here we show that Nef is released in CD45-containing microvesicles. This microvesicular Nef (mvNef) is detected in the plasma of HIV-infected individuals at relatively high concentrations (10 ng/ml). It is also present in tissue culture supernatants of Jurkat cells infected with HIV(MN). Interestingly, plasma mvNef levels in HIV(+) patients did not significantly correlate with viral load or CD4 count. Microvesicular Nef levels persisted in the plasma of HIV-infected individuals despite the use of antiretroviral therapy, even in individuals with undetectable viral loads. Using cell lines, we found Nef microvesicles induce apoptosis in Jurkat T-lymphocytes but had no observed effect on the U937 monocytic cell line. Given the large amount of mvNef present in the plasma of HIV-infected individuals, the apoptotic effect of mvNef on T cells, and the observed functions of extracellular soluble Nef in vitro, it seems likely that in vivo mvNef may play a significant role in the pathogenesis of AIDS.

authors

Raymond AD,Campbell-Sims TC,Khan M,Lang M,Huang MB,Bond VC,Powell MD

doi

10.1089/aid.2009.0170

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

167-78

issue

2

eissn

0889-2229

issn

1931-8405

journal_volume

27

pub_type

杂志文章
  • High frequency of vitamin D deficiency in ambulatory HIV-Positive patients.

    abstract::Several reports have suggested an increased prevalence of osteopenia and osteoporosis in HIV-infected individuals. Vitamin D deficiency may be a risk factor for osteoporosis and bone fractures. We aimed to determine the prevalence of vitamin D insufficiency in an outpatient HIV clinic in Boston. We collected serum lev...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2008.0183

    authors: Rodríguez M,Daniels B,Gunawardene S,Robbins GK

    更新日期:2009-01-01 00:00:00

  • HTLV type 1 infection in squirrel monkeys (Saimiri sciureus): a promising animal model for HTLV type 1 human infection.

    abstract::We show that the squirrel monkey Saimiri sciureus is susceptible to experimental infection with either syngeneic or allogeneic HTLV-1-immortalized cells. As in humans, such experimental inoculation leads to chronic infection, and HTLV-1 provirus was detected in PBMCs by PCR. Chronically infected monkeys developed high...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,评审

    doi:10.1089/08892220050193245

    authors: Kazanji M

    更新日期:2000-11-01 00:00:00

  • Short Communication: Characterization of a New HIV-1 Group N Isolate Originating from a Cameroonian Patient.

    abstract::HIV-1 group N (HIV-1/N) remains rare and mainly restricted to Cameroon. In this study, we report a new HIV-1/N infected case identified during routine HIV screening activities in Yaounde. The genetic characterization of the near full-length genome of this virus strain revealed that it is genetically distinct to all HI...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2018.0015

    authors: Tagnouokam Ngoupo PA,Sadeuh-Mba SA,De Oliveira F,Ngo-Malabo ET,Ngono L,Plantier JC,Kfutwah A,Njouom R

    更新日期:2018-07-01 00:00:00

  • Molecular characterization of a recombinant HIV type 1 isolate (A/G/E/?): unidentified regions may be derived from parental subtype E sequences.

    abstract::Recombination is one of several factors contributing to the genetic diversity of HIV-1, which is divided into group M (itself comprising 11 subtypes, A-K) and two other groups named O and N. In the present study, the full-length genome of an HIV-1 isolate obtained from a Greek subject (GR17) infected in the Democratic...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/08892220050042783

    authors: Paraskevis D,Magiorkinis M,Paparizos V,Pavlakis GN,Hatzakis A

    更新日期:2000-06-10 00:00:00

  • Lack of correlation between SIV-Nef evolution and rapid disease progression in morphine-dependent nonhuman primate model of AIDS.

    abstract::Six morphine-dependent and two control macaques were infected in an SIV/SHIV nonhuman primate model of AIDS. Three animals in the morphine group rapidly developed clinical disease and died within the timeframe of this study. The sequence evolution of nef in plasma virus was assessed at 4, 12, and 20 weeks postinfectio...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2006.22.817

    authors: Noel RJ,Toro-Bahamonde A,Marrero-Otero Z,Orsini S,Verma AS,Kumar R,Kumar A

    更新日期:2006-08-01 00:00:00

  • B and T cell reactivities after immunization of macaques with HIV subcomponents.

    abstract::A model system was established for studies of humoral and cellular immunity to human immunodeficiency virus (HIV) antigens after vaccination. Macaques (Macaca fascicularis) were immunized with purified HIV, an infected cell extract rich in gp120 or polypeptides of cloned genes representing parts of p24, gp41, and gp12...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1988.4.199

    authors: Wahren B,Chiodi F,Ljunggren K,Putney S,Kurth R,Gallo RC,Fenyö EM

    更新日期:1988-06-01 00:00:00

  • The maximal tolerable intravenous dosage of pentoxifylline in AIDS patients does not inhibit lipopolysaccharide-stimulated tumor necrosis factor alpha production.

    abstract::Tumor necrosis factor alpha (TNF-alpha) may be involved in the pathogenesis of metabolic and endocrine changes in HIV infection. Pentoxifylline (PTX) is able to suppress the production of TNF-alpha in vitro. The effect of two dosages of intravenously administered PTX on clinical symptoms and ex vivo LPS-stimulated TNF...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1998.14.299

    authors: Heijligenberg R,Romijn JA,Ackermans M,Endert E,Timmer JG,Sauerwein HP

    更新日期:1998-03-01 00:00:00

  • Molecular and phylogenetic analysis of HIV type 1 vpr sequences of South African strains.

    abstract::HIV-1 subtype C is the prevalent subtype in South Africa, with non-C subtypes being sporadically detected. The accessory genes of subtype C have not been well studied in South Africa. In this study the HIV-1 vpr region of 58 strains was amplified, sequenced, and subtyped. Phylogenetic analysis characterized 54 strains...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2008.0251

    authors: Romani B,Glashoff R,Engelbrecht S

    更新日期:2009-03-01 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

  • 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

  • Genotypic characterization of human immunodeficiency virus type 1 in Greece. Multicentre Study on HIV-1 Heterogeneity.

    abstract::The HIV-1 subtype distribution in 83 HIV-1-seropositive individuals living in Greece was investigated by using the heteroduplex mobility assay (HMA), DNA sequencing, and phylogenetic analysis. The results revealed that partial HIV-1 gp120 sequences from 71 (86%) patients were subtype B, 5 (6%) were subtype A, 4 were s...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,多中心研究

    doi:10.1089/aid.1998.14.685

    authors: Nasioulas G,Paraskevis D,Paparizos V,Lazanas M,Karafoulidou A,Hatzakis A

    更新日期:1998-05-20 00:00:00

  • Membrane-interactive phospholipids inhibit HIV type 1-induced cell fusion and surface gp160/gp120 binding to monoclonal antibody.

    abstract::Membrane-interactive phospholipids (PLs), previously evaluated for activity against HIV-1 in vitro, are known to affect late steps in viral replication. Studies were done to determine the effects of PL analogs on post-translational processing of HIV-1 proteins, binding of viral surface gp160/gp120 to CD4 receptor, and...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1995.11.705

    authors: Krugner-Higby L,Goff D,Edwards T,Iyer N,Neufeld J,Kute T,Morris-Natschke S,Ishaq K,Piantadosi C,Kucera LS

    更新日期:1995-06-01 00:00:00

  • Genetic diversity on the integrase region of the pol gene among HIV type 1-infected patients naive for integrase inhibitors in São Paulo City, Brazil.

    abstract::The presence of mutations associated with integrase inhibitor (INI) resistance among INI-naive patients may play an important clinical role in the use of those drugs Samples from 76 HIV-1-infected subjects naive to INIs were submitted to direct sequencing. No differences were found between naive (25%) subjects and sub...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2009.0179

    authors: Arruda LB,Fonseca LA,Duarte AJ,Casseb J

    更新日期:2010-01-01 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

  • Change in the Prevalence of HIV-1 and the Rate of Transmitted Drug-Resistant HIV-1 in Haiphong, Northern Vietnam.

    abstract::We previously reported a significant decrease in HIV-1 prevalence, with no increase in drug-resistant HIV-1 among injecting drug users (IDU), female sex workers (FSW), and blood donors (BD), in Haiphong, Vietnam, from 2007 to 2009. In 2012, 388 IDU, 51 FSW, and 200 BD were recruited for further analysis. None had a hi...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2015.0071

    authors: Pham HV,Ishizaki A,Nguyen CH,Saina MC,Hoang HT,Tran VT,Bi X,Pham TV,Ichimura H

    更新日期:2015-07-01 00:00:00

  • Identification of a recombinant HTLV-II envelope protein for serological detection of HTLV-II carriers.

    abstract::To understand the pathogenic potential and the true extent of human T-cell leukemia virus type II (HTLV-II) infection, it is important to develop a specific HTLV-II antigen-based serological test. Plasmid pIIB was constructed and induced in Escherichia coli to express a recombinant protein (RP) containing 140 amino ac...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1991.7.453

    authors: Chen YM,Essex M

    更新日期:1991-05-01 00:00:00

  • Generation and structural analysis of soluble oligomeric gp140 envelope proteins derived from neutralization-resistant and neutralization-susceptible primary HIV type 1 isolates.

    abstract::We generated DNA constructs expressing soluble truncated forms of the envelope of SF162, a neutralization-resistant primary human immunodeficiency virus type 1 isolate, and SF162AV2, a neutralization-susceptible virus derived from SF162 after the deletion of 30 amino acids from the V2 loop. The constructs express the ...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/08892220050058407

    authors: Stamatatos L,Lim M,Cheng-Mayer C

    更新日期:2000-07-01 00:00:00

  • Demonstration of de novo HIV type 1 production by detection of multiply spliced and unspliced HIV type 1 RNA in paraffin-embedded tonsils.

    abstract::HIV-1 infection of tonsils takes place when virus spreads systemically, and may occur when tonsillar tissue serves as the initial portal of HIV-1 entry. The HIV replication cycle includes the production of regulatory and accessory gene mRNAs, produced by splicing of genomic mRNA, that are hallmarks of de novo virus pr...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/08892220260139521

    authors: Brachtel EF,Mascola JR,Wear DJ,Ehrenberg PK,Dayhoff DE,Sanders-Buell E,Michael NL,Frankel SS

    更新日期:2002-07-20 00:00:00

  • Intranasal immunization is superior to vaginal, gastric, or rectal immunization for the induction of systemic and mucosal anti-HIV antibody responses.

    abstract::Vaginal anti-HIV antibody responses may be beneficial, and possibly required, for vaccine-induced protection against HIV infection acquired through receptive vaginal intercourse. We have previously determined that intranasal immunization with a hybrid HIV peptide and cholera toxin induced vaginal anti-HIV IgA response...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1997.13.945

    authors: Staats HF,Montgomery SP,Palker TJ

    更新日期:1997-07-20 00:00:00

  • Antiviral activity of the interferon-induced cellular protein BST-2/tetherin.

    abstract::Pathogenic microorganisms encode proteins that antagonize specific aspects of innate or adaptive immunity. Just as the study of the HIV-1 accessory protein Vif led to the identification of cellular cytidine deaminases as host defense proteins, the study of HIV-1 Vpu recently led to the discovery of the interferon-indu...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,评审

    doi:10.1089/aid.2009.0253

    authors: Tokarev A,Skasko M,Fitzpatrick K,Guatelli J

    更新日期:2009-12-01 00:00:00

  • HIV-1 reverse transcriptase inhibitor from Phyllanthus niruri.

    abstract::An aqueous extract of Phyllanthus niruri (Euphorbiaceae) inhibited human immunodeficiency virus type-1 reverse transcriptase (HIV-1-RT). The inhibitor against HIV-1-RT in this plant was purified by combination of three column chromatographies, Sephadex LH-20, cellulose, and reverse-phase high-performance liquid chroma...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1992.8.1937

    authors: Ogata T,Higuchi H,Mochida S,Matsumoto H,Kato A,Endo T,Kaji A,Kaji H

    更新日期:1992-11-01 00:00:00

  • HIV type 1 inhibition by protein kinase C modulatory compounds.

    abstract::The dichotomous effects of the protein kinase C (PKC) modulatory compounds 12-myristate 13-acetate (PMA), prostratin, and ingenol 3-angelate (I3A) on HIV-1 infection were investigated. PKC modulatory compounds were shown to be potent activators of cells latently infected with HIV-1 (I3A > prostratin). Conversely, PKC ...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2006.22.854

    authors: Warrilow D,Gardner J,Darnell GA,Suhrbier A,Harrich D

    更新日期:2006-09-01 00:00:00

  • RNA secondary structure and squence conservation in C1 region of human immunodeficiency virus type 1 env gene.

    abstract::We have analyzed amino acid, nucleotide sequence, and RNA secondary structure variability in the env gene of human immunodeficiency virus type (HIV-1). In applying algorithms for computing optimal RNA-folding patterns to a nonredundant data set of 178 env nucleotide sequences, we found a conserved RNA stem-loop struct...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/08892220260190353

    authors: Peleg O,Brunak S,Trifonov EN,Nevo E,Bolshoy A

    更新日期:2002-08-10 00:00:00

  • HIV type 1 diversity in northern Paris, France.

    abstract::During a 6-month period, we studied the diversity of HIV-1 subtypes in 392 adult patients seen in Bichat-Claude Bernard Hospital, northern Paris, France. All the samples were serotyped and a subset was genotyped by means of HMA. Serotyping was performed with a new peptide subtype-specific EIA (SSEIA), based on in vitr...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.1996.12.1427

    authors: Simon F,Loussert-Ajaka I,Damond F,Saragosti S,Barin F,Brun-Vézinet F

    更新日期:1996-10-10 00:00:00

  • Short communication: effects of age on virologic suppression and CD4 cell response in HIV-positive patients initiating combination antiretroviral therapy.

    abstract::Older HIV-positive patients may experience reduced benefit and increased toxicities from combination antiretroviral therapies (cART) due to late diagnosis, weakened immune systems, and other age-related physiological changes. This study investigates the effect of age on time to virologic suppression and CD4 cell count...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2012.0018

    authors: Szadkowski L,Tseng A,Walmsley SL,Salit I,Raboud JM

    更新日期:2012-12-01 00:00:00

  • Seroepidemiological and molecular studies of human T cell lymphotropic virus type II, subtype b, in isolated groups of Mataco and Toba Indians of northern Argentina.

    abstract::We studied plasma samples from 2082 Mataco Indians living in 22 different communities in the western part of Formosa Province, northern Argentina. Samples were screened for HTLV-I/II antibodies by particle agglutination assay. All positive or borderline samples were then tested by an immunofluorescence assay (IFA) on ...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/088922299311150

    authors: Biglione M,Vidan O,Mahieux R,de Colombo M,de los Angeles de Basualdo M,Bonnet M,Pankow G,De Efron MA,Zorrilla A,Tekaia F,Murphy E,de Thé G,Gessain A

    更新日期:1999-03-20 00:00:00

  • New concepts in AIDS pathogenesis.

    abstract::The concept that HIV causes AIDS only by directly killing CD4 cells has been questioned by a number of investigators. There has been experimental support for a number of indirect mechanisms such as apoptosis, anergy, superantigen-induced cell proliferation and depletion, defective signaling, molecular mimicry, and aut...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章,评审

    doi:10.1089/aid.1993.9.287

    authors: Gougeon ML,Colizzi V,Dalgleish A,Montagnier L

    更新日期:1993-03-01 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

  • The 2005 Italian Quality Control Study for the evaluation of CD4 cells in centers involved in the treatment of HIV type 1 patients.

    abstract::We report the results of an external quality control program, including 17 Italian centers involved in the care of patients infected by HIV, to evaluate CD4 T cell count proficiency and reproducibility. The centers received two commercial stabilized blood preparations, one with "normal" and one with "low" CD4 T cell c...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/aid.2006.0295

    authors: Martini F,D'Offizi G,Girardi E,Vitale A,Cimini E,Mollicone B,Vlassi C,Aiuti F,Other Members of 2005 Italian CD4 Quality Control Network.

    更新日期:2007-06-01 00:00:00

  • Conserved HIV-1 Gag p24 Epitopes Elicit Cellular Immune Responses That Impact Disease Outcome.

    abstract::Although the breadth of the human immunodeficiency virus type 1 (HIV-1)-specific cellular immune response and its impact on the control of viral replication have already been addressed, reported data have proven controversial. We hypothesize that the nature of targeted epitopes, rather than the simple breadth or magni...

    journal_title:AIDS research and human retroviruses

    pub_type: 杂志文章

    doi:10.1089/AID.2016.0168

    authors: Tarosso LF,Vieira VA,Sauer MM,Tomiyama HI,Kalil J,Kallas EG

    更新日期:2017-08-01 00:00:00