HLA Class I Alleles Associated with Susceptibility or Resistance to Human Immunodeficiency Virus Type 1 Infection among a Population in Chaco Province, Argentina

2000 ◽  
Vol 182 (5) ◽  
pp. 1523-1526 ◽  
Author(s):  
Alicia Habegger de Sorrentino ◽  
Karina Marinic ◽  
Patricia Motta ◽  
Adrián Sorrentino ◽  
Roxana López ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Hla Class I ◽  
Class I ◽  
Immunodeficiency Virus ◽  
Chaco Province

scholarly journals Mutually Exclusive T-Cell Receptor Induction and Differential Susceptibility to Human Immunodeficiency Virus Type 1 Mutational Escape Associated with a Two-Amino-Acid Difference between HLA Class I Subtypes

2006 ◽  
Vol 81 (4) ◽  
pp. 1619-1631 ◽  
Author(s):  
Xu G. Yu ◽  
Mathias Lichterfeld ◽  
Senica Chetty ◽  
Katie L. Williams ◽  
Stanley K. Mui ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
T Cell ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Hla Class I ◽  
Viral Escape ◽  
Class I ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT The relative contributions of HLA alleles and T-cell receptors (TCRs) to the prevention of mutational viral escape are unclear. Here, we examined human immunodeficiency virus type 1 (HIV-1)-specific CD8+ T-cell responses restricted by two closely related HLA class I alleles, B*5701 and B*5703, that differ by two amino acids but are both associated with a dominant response to the same HIV-1 Gag epitope KF11 (KAFSPEVIPMF). When this epitope is presented by HLA-B*5701, it induces a TCR repertoire that is highly conserved among individuals, cross-recognizes viral epitope variants, and is rarely associated with mutational escape. In contrast, KF11 presented by HLA-B*5703 induces an entirely different, more heterogeneous TCR β-chain repertoire that fails to recognize specific KF11 escape variants which frequently arise in clade C-infected HLA-B*5703+ individuals. These data show the influence of HLA allele subtypes on TCR selection and indicate that extensive TCR diversity is not a prerequisite to prevention of allowable viral mutations.

scholarly journals Favorable and Unfavorable HLA Class I Alleles and Haplotypes in Zambians Predominantly Infected with Clade C Human Immunodeficiency Virus Type 1

2002 ◽  
Vol 76 (16) ◽  
pp. 8276-8284 ◽  
Author(s):  
Jianming Tang ◽  
Shenghui Tang ◽  
Elena Lobashevsky ◽  
Angela D. Myracle ◽  
Ulgen Fideli ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Hla Class I ◽  
Class I ◽  
Hla Class I Molecules ◽  
Immunodeficiency Virus ◽  
Clade C ◽  
Hiv 1

ABSTRACT The setpoint of viral RNA concentration (viral load [VL]) during chronic human immunodeficiency virus type 1 (HIV-1) infection reflects a virus-host equilibration closely related to CD8+ cytotoxic T-lymphocyte (CTL) responses, which rely heavily on antigen presentation by the human major histocompatibility complex (MHC) (i.e., HLA) class I molecules. Differences in HIV-1 VL among 259 mostly clade C virus-infected individuals (137 females and 122 males) in the Zambia-UAB HIV Research Project (ZUHRP) were associated with several HLA class I alleles and haplotypes. In particular, general linear model analyses revealed lower log10 VL among those with HLA allele B*57 (P = 0.002 [without correction]) previously implicated in favorable response and in those with HLA B*39 and A*30-Cw*03 (P = 0.002 to 0.016); the same analyses also demonstrated higher log10 VL among individuals with A*02-Cw*16, A*23-B*14, and A*23-Cw*07 (P = 0.010 to 0.033). These HLA effects remained strong (P = 0.0002 to 0.075) after adjustment for age, gender, and duration of infection and persisted across three orders of VL categories (P = 0.001 to 0.084). In contrast, neither B*35 (n = 15) nor B*53 (n = 53) showed a clear disadvantage such as that reported elsewhere for these closely related alleles. Other HLA associations with unusually high (A*68, B*41, B*45, and Cw*16) or low (B*13, Cw*12, and Cw*18) VL were either unstable or reflected their tight linkage respecting disequilibria with other class I variants. The three consistently favorable HLA class I variants retained in multivariable models and in alternative analyses were present in 30.9% of subjects with the lowest (<10,000 copies per ml) and 3.1% of those with the highest (>100,000) VL. Clear differential distribution of HLA profiles according to level of viremia suggests important host genetic contribution to the pattern of immune control and escape during HIV-1 infection.

HLA Class I Homozygosity Accelerates Disease Progression in Human Immunodeficiency Virus Type 1 Infection

1999 ◽  
Vol 15 (4) ◽  
pp. 317-324 ◽  
Author(s):  
Jianming Tang ◽  
Caroline Costello ◽  
Ireneus P.M. Keet ◽  
Charles Rivers ◽  
Susan Leblanc ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Disease Progression ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Hla Class I ◽  
Class I ◽  
Immunodeficiency Virus

scholarly journals Passive Sexual Transmission of Human Immunodeficiency Virus Type 1 Variants and Adaptation in New Hosts

2006 ◽  
Vol 80 (14) ◽  
pp. 7226-7234 ◽  
Author(s):  
A. J. Frater ◽  
C. T. T. Edwards ◽  
N. McCarthy ◽  
J. Fox ◽  
H. Brown ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Immune Escape ◽  
Hla Class I ◽  
Class I ◽  
Dependent Manner ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT Human immunodeficiency virus type 1 (HIV-1) genetic diversity is a major obstacle for the design of a successful vaccine. Certain viral polymorphisms encode human leukocyte antigen (HLA)-associated immune escape, potentially overcoming limited vaccine protection. Although transmission of immune escape variants has been reported, the overall extent to which this phenomenon occurs in populations and the degree to which it contributes to HIV-1 viral evolution are unknown. Selection on the HIV-1 env gene at transmission favors neutralization-sensitive variants, but it is not known to what degree selection acts on the internal HIV-1 proteins to restrict or enhance the transmission of immune escape variants. Studies have suggested that HLA class I may determine susceptibility to HIV-1 infection, but a definitive role for HLA at transmission remains unproven. Comparing populations of acute seroconverters and chronically infected patients, we found no evidence of selection acting to restrict transmission of HIV-1 variants. We found that statistical associations previously reported in chronic infection between viral polymorphisms and HLA class I alleles are not present in acute infection, suggesting that the majority of viral polymorphisms in these patients are the result of transmission rather than de novo adaptation. Using four episodes of HIV-1 transmission in which the donors and recipients were both sampled very close to the time of infection we found that, despite a transmission bottleneck, genetic variants of HIV-1 infection are transmitted in a frequency-dependent manner. As HIV-1 infections are seeded by unique donor-adapted viral variants, each episode is a highly individual antigenic challenge. Host-specific, idiosyncratic HIV-1 antigenic diversity will seriously tax the efficacy of immunization based on consensus sequences.

Human immunodeficiency virus type 1 gp120 C5 region mimics the HLA class I α1 peptide-binding domain

1993 ◽  
Vol 23 (8) ◽  
pp. 2016-2021 ◽  
Author(s):  
Lucia Lopalco ◽  
Claudio de Santis ◽  
Raffaella Meneveri ◽  
Renato Longhi ◽  
Enrico Ginelli ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Peptide Binding ◽  
Hla Class I ◽  
Binding Domain ◽  
Class I ◽  
Immunodeficiency Virus

scholarly journals HLA Class I Subtype-Dependent Expansion of KIR3DS1+ and KIR3DL1+ NK Cells during Acute Human Immunodeficiency Virus Type 1 Infection

2009 ◽  
Vol 83 (13) ◽  
pp. 6798-6805 ◽  
Author(s):  
Galit Alter ◽  
Suzannah Rihn ◽  
Katharine Walter ◽  
Anne Nolting ◽  
Maureen Martin ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Nk Cells ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Hla Class I ◽  
Class I ◽  
Immunodeficiency Virus ◽  
Acute Hiv ◽  
Hiv 1

ABSTRACT NK cells are critical in the early containment of viral infections. Epidemiological and functional studies have shown an important role of NK cells expressing specific killer immunoglobulin-like receptors (KIRs) in the control of human immunodeficiency virus type 1 (HIV-1) infection, but little is known about the mechanisms that determine the expansion of these antiviral NK cell populations during acute HIV-1 infection. Here we demonstrate that NK cells expressing the activating receptor KIR3DS1+ and, to a lesser extent, the inhibitory receptor KIR3DL1+ specifically expand in acute HIV-1 infection in the presence of HLA-B Bw480I, the putative HLA class I ligand for KIR3DL1/3DS1. These data demonstrate for the first time the HLA class I subtype-dependent expansion of specific KIR+ NK cells during an acute viral infection in humans.

scholarly journals Sexual Transmission of Single Human Immunodeficiency Virus Type 1 Virions Encoding Highly Polymorphic Multisite Cytotoxic T-Lymphocyte Escape Variants

2005 ◽  
Vol 79 (22) ◽  
pp. 13953-13962 ◽  
Author(s):  
Anita Milicic ◽  
Charles T. T. Edwards ◽  
Stéphane Hué ◽  
Julie Fox ◽  
Helen Brown ◽  
...  
Keyword(s):  
Human Immunodeficiency Virus ◽  
Human Immunodeficiency Virus Type ◽  
Virus Type ◽  
Acute Infection ◽  
Hla Class I ◽  
Class I ◽  
Viral Control ◽  
Immunodeficiency Virus ◽  
Hiv 1

ABSTRACT Antigenic variation inherent in human immunodeficiency virus type 1 (HIV-1) virions that successfully instigate new infections transferred by sex has not been well defined. Yet this is the viral “challenge” which any vaccine-induced immunity must deal with. Closely timed comparisons of the virus circulating in the “donor” and that which initiates new infection are difficult to carry out rigorously, as suitable samples are very hard to get in the face of ethical hurdles. Here we investigate HIV-1 variation in four homosexual couples where we sampled blood from both parties within several weeks of the estimated transmission event. We analyzed variation within highly immunogenic HIV-1 internal proteins encoding epitopes recognized by cytotoxic Tlymphocytes (CTLs). These responses are believed to be crucial as a means of containing viral replication. In the donors we detected virions capable of evading host CTL recognition at several linked epitopes of distinct HLA class I restriction. When a donor transmitted escape variants to a recipient with whom he had HLA class I molecules in common, the recipient's CTL response to those epitopes was prevented, thus impeding adequate viral control. In addition, we show that even when HLA class I alleles are disparate in the transmitting couple, a single polymorphism can abolish CTL recognition of an overlapping epitope of distinct restriction and so confer immune escape properties to the recipient's seroconversion virus. In donors who are themselves controlling an early, acute infection, the precise timing of onward transmission is a crucial determinant of the viral variants available to compose the inoculum.

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