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HIV variation

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https://www.readbyqxmd.com/read/28220738/the-influence-of-hiv-infection-on-the-age-dependence-of-squamous-cell-carcinoma-of-the-skin-in-south-africa
#1
B L Diffey, M Norval, P N Albers, C Y Wright
BACKGROUND: Cancer incidence typically increases with age, but it is not known whether ethnic characteristics influence the age dependence of squamous cell carcinoma of the skin (SCC). OBJECTIVES: (i) To determine the age dependence of SCC in the black African, coloured and white population groups of South Africa (SA); and (ii) to show whether any differences in the rate of change of age dependence could be influenced by diversity in behaviour and lifestyle, especially with regard to the prevalence of HIV infection, rather than by a fundamental variation in cancer biology between the populations...
January 30, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28213870/molecular-characterization-of-bovine-leukemia-virus-from-moldovan-dairy-cattle
#2
Aneta Pluta, Marzena Rola-Łuszczak, Piotr Kubiś, Svetlana Balov, Roman Moskalik, Bhudipa Choudhury, Jacek Kuźmak
Bovine leukemia virus (BLV) is the causative agent of enzootic bovine leukosis (EBL), a disease that has worldwide distribution. Whilst it has been eradicated in most of Western Europe and Scandinavia, it remains a problem in other regions, particularly Eastern Europe and South America. For this study, in 2013, 24 cattle from three farms in three regions of Moldova were screened by ELISA and nested PCR. Of these cattle, 14 which were PCR positive, and these were molecularly characterized based on the nucleotide sequence of the env gene and the deduced amino acid sequence of the encoded gp51 protein...
February 17, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28207555/human-immunodeficiency-virus-negative-plasmablastic-lymphoma-a-case-report-and-literature-review
#3
Li Lin, Xudong Zhang, Meng Dong, Ling Li, Xinhua Wang, Lei Zhang, Xiaorui Fu, Zhenchang Sun, Jingjing Wu, Zhaoming Li, Yu Chang, Yingjun Wang, Zhiyuan Zhou, Mingzhi Zhang, Qingjiang Chen
RATIONALE: Plasmablastic lymphoma (PBL) is a rare subtype of human immunodeficiency virus (HIV)-related non-Hodgkin's lymphoma that predominantly manifests in the oral cavity. PATIENT CONCERNS: Three cases of HIV-negative PBL were reported. DIAGNOSES: HIV-negative PBL INTERVENTIONS:: The patient had undergone chemotherapy. OUTCOMES: Clinical outcomes were very poor in Cases 1 and 3; Case 2, whose diagnosis suggested no bone marrow involvement, is still alive...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28203627/variations-in-gynecologic-oncology-training-in-low-lic-and-middle-income-mic-countries-lmics-common-efforts-and-challenges
#4
REVIEW
Carolyn Johnston, Joseph S Ng, Ranjit Manchanda, Audrey Tieko Tsunoda, Linus Chuang
Gynecologic cancer, cervical cancer in particular, is disproportionately represented in the developing world where mortality is also high. Screening programs, increased availability of chemotherapy, and an awareness of HIV-related cancers have in part accelerated a need for physicians who can treat these cancers, yet the infrastructure for such training is often lacking. In this paper, we address the variations in gynecology oncology training in LMICs as well as the ubiquitous challenges, in an effort to guide future agendas...
May 2017: Gynecologic Oncology Reports
https://www.readbyqxmd.com/read/28197762/mitochondrial-haplotypes-of-aelurostrongylus-abstrusus-and-troglostrongylus-brevior-nematoda-metastrongyloidea-from-domestic-and-wild-felids
#5
Donato Traversa, Fabrizia Veronesi, Anastasia Diakou, Raffaella Iorio, Giulia Simonato, Federica Marcer, Angela Di Cesare
The lungworm Aelurostrongylus abstrusus is the most important respiratory parasite of domestic cats. Pulmonary aelurostrongylosis has been reported in wild felids, though unequivocally evidence of wildlife infection by A. abstrusus is scant. Recently, Troglostrongylus brevior, a lungworm usually infecting wild felids, has been described in domestic cats from Mediterranean areas. The present work evaluates the sequence variation of an informative region within the gene encoding the mitochondrial cytochrome c oxidase subunit 1 of A...
February 14, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28196510/partial-hiv-c2v3-envelope-sequence-analysis-reveals-association-of-coreceptor-tropism-envelope-glycosylation-and-viral-genotypic-variability-among-kenyan-patients-on-haart
#6
Rose C Kitawi, Carol W Hunja, Rashid Aman, Bernhards R Ogutu, Anne W T Muigai, Gilbert O Kokwaro, Washingtone Ochieng
BACKGROUND: HIV-1 is highly variable genetically and at protein level, a property it uses to subvert antiviral immunity and treatment. The aim of this study was to assess if HIV subtype differences were associated with variations in glycosylation patterns and co-receptor tropism among HAART patients experiencing different virologic treatment outcomes. METHODS: A total of 118 HIV env C2V3 sequence isolates generated previously from 59 Kenyan patients receiving highly active antiretroviral therapy (HAART) were examined for tropism and glycosylation patterns...
February 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28194140/hiv-1-tat-and-viral-latency-what-we-can-learn-from-naturally-occurring-sequence-variations
#7
REVIEW
Doreen Kamori, Takamasa Ueno
Despite the effective use of antiretroviral therapy, the remainder of a latently HIV-1-infected reservoir mainly in the resting memory CD4(+) T lymphocyte subset has provided a great setback toward viral eradication. While host transcriptional silencing machinery is thought to play a dominant role in HIV-1 latency, HIV-1 protein such as Tat, may affect both the establishment and the reversal of latency. Indeed, mutational studies have demonstrated that insufficient Tat transactivation activity can result in impaired transcription of viral genes and the establishment of latency in cell culture experiments...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28193236/coverage-of-harm-reduction-services-and-hiv-infection-a-multilevel-analysis-of-five-chinese-cities
#8
Qing Wu, Carlijn Kamphuis, Lin Duo, Jiahong Luo, Ying Chen, Jan Hendrik Richardus
BACKGROUND: Since 2003, a harm reduction program for injecting drug users has been rolled out countrywide in China. It entails services for condom promotion, a needle and syringe program (NSP), and methadone maintenance treatment (MMT). However, it remains unknown if and to what extent the coverage of these services at city level is related to a reduced risk of HIV infection among drug users. METHODS: We wished to quantify the extent to which city-level characteristics (such as NSP and MMT service coverage) and individual-level determinants (e...
February 14, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28191538/lipodystrophy-hiv-related-and-fgf21-a-new-marker-to-follow-the-progression-of-lipodystrophy
#9
Stefano Benedini, Livio Luzi
Recently new evidence about fibroblast growth factor 21 (FGF21) highlights the opportunities to use this molecule in new pharmaceutical formulations to combat type 2 diabetes and metabolic syndrome. It is well known that HIV is per se a condition of insulin resistance and in particular the patient with HIV-related lipodystrophy has a condition strictly related to metabolic syndrome. Lipodystrophy is associated with severe metabolic side effects, including dyslipidemia, hepatic insulin resistance, and lipid oxidation impairment...
December 1, 2016: Journal of Translational Internal Medicine
https://www.readbyqxmd.com/read/28187506/the-effect-of-gene-variants-on-levonorgestrel-pharmacokinetics-when-combined-with-antiretroviral-therapy-containing-efavirenz-or-nevirapine
#10
M Neary, M Lamorde, A Olagunju, K M Darin, C Merry, P Byakika-Kibwika, D J Back, M Siccardi, A Owen, K K Scarsi
Reduced levonorgestrel concentrations from the levonorgestrel contraceptive implant was previously seen when given concomitantly with efavirenz. We sought to assess whether single nucleotide polymorphisms (SNPs) in genes involved in efavirenz and nevirapine metabolism were linked to these changes in levonorgestrel concentration. SNPs in CYP2B6, CYP2A6, NR1I2 and NR1I3 were analysed. Associations of participant demographics and genotype with levonorgestrel pharmacokinetics were evaluated in HIV-positive women using the levonorgestrel implant plus efavirenz- or nevirapine-based ART, in comparison to ART-naïve women using multivariate linear regression...
February 10, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28182675/comparing-longitudinal-cd4-responses-to-cart-among-non-perinatally-hiv-infected-youth-versus-adults-results-from-the-hivrn-cohort
#11
Allison L Agwu, John A Fleishman, Guy Mahiane, Bareng Aletta Sanny Nonyane, Keri N Althoff, Baligh R Yehia, Stephen A Berry, Richard Rutstein, Ank Nijhawan, Christopher Mathews, Judith A Aberg, Jeanne C Keruly, Richard D Moore, Kelly A Gebo
BACKGROUND: Youth have residual thymic tissue and potentially greater capacity for immune reconstitution than adults after initiation of combination antiretroviral therapy (cART). However, youth face behavioral and psychosocial challenges that may make them more likely than adults to delay ART initiation and less likely to attain similar CD4 outcomes after initiating cART. This study compared CD4 outcomes over time following cART initiation between ART-naïve non-perinatally HIV-infected (nPHIV) youth (13-24 years-old) and adults (≥25-44 years-old)...
2017: PloS One
https://www.readbyqxmd.com/read/28182649/estimating-the-respective-contributions-of-human-and-viral-genetic-variation-to-hiv-control
#12
István Bartha, Paul J McLaren, Chanson Brumme, Richard Harrigan, Amalio Telenti, Jacques Fellay
We evaluated the fraction of variation in HIV-1 set point viral load attributable to viral or human genetic factors by using joint host/pathogen genetic data from 541 HIV infected individuals. We show that viral genetic diversity explains 29% of the variation in viral load while host factors explain 8.4%. Using a joint model including both host and viral effects, we estimate a total of 30% heritability, indicating that most of the host effects are reflected in viral sequence variation.
February 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28182609/genetic-polymorphisms-associated-with-liver-disease-progression-in-hiv-hcv-coinfected-patients
#13
Luz M Medrano, María A Jiménez-Sousa, Amanda Fernández-Rodríguez, Salvador Resino
The pathogenic mechanisms of the accelerated progression of liver injury in HIV/HCV coinfection are incompletely understood. The progression of liver disease is variable between individuals having similar risk factors, suggesting that genetic background is an important contributor. The aim of this review is to give a summary of all single nucleotide polymorphisms associated with the severity of liver disease in patients coinfected with HIV and HCV reported in the literature. Therefore, a systematic search for articles published was made, 17 of which were selected for this review...
January 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28181541/gene-variation-in-il-7-receptor-il-7r-%C3%AE-affects-il-7r-response-in-cd4-t-cells-in-hiv-infected-individuals
#14
Hans Jakob Hartling, Lars P Ryder, Henrik Ullum, Niels Ødum, Susanne Dam Nielsen
Optimal CD4+ T cell recovery after initiating combination antiretroviral treatment (cART) in HIV infection reduces risk of morbidity and mortality. T-allele homozygosity ('TT') in the single nucleotide polymorphism, rs6897932(C/T), in the IL-7 receptor α (IL-7RA) is associated with faster CD4+ T cell recovery after cART initiation compared to C-allele homozygosity in rs6897932 ('CC'). However, underlying mechanisms are unknown. We aimed to examine potential mechanisms explaining the association between rs6897932 and CD4+ T cell recovery...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28178893/sexually-transmitted-infection-prevalence-and-related-risk-factors-among-heterosexual-male-methamphetamine-users-in-china
#15
Dianchang Liu, Zhenxia Jiang, Cuizhen Xiu, Zhizhi Li, Qing Song, Zhenhong Wang
Few studies have examined the association between methamphetamine (MA) abuse and sexually transmitted infection (STI) risk among heterosexual male MA users in China. A total of 288 heterosexual male MA users who met our inclusion criteria were recruited from nightclubs, KTVs, bars, bath centres and an STI clinic. STIs were screened among the participants, and the risk factors related to STIs were analysed by multivariate logistic regression in SPSS 11.0. Among the 288 heterosexual male MA users, 51 (17.7%) had syphilis, 36 (12...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28178316/md-simulation-of-the-tat-cyclin-t1-cdk9-complex-revealing-the-hidden-catalytic-cavity-within-the-cdk9-molecule-upon-tat-binding
#16
Kaori Asamitsu, Takatsugu Hirokawa, Takashi Okamoto
In this study, we applied molecular dynamics (MD) simulation to analyze the dynamic behavior of the Tat/CycT1/CDK9 tri-molecular complex and revealed the structural changes of P-TEFb upon Tat binding. We found that Tat could deliberately change the local flexibility of CycT1. Although the structural coordinates of the H1 and H2 helices did not substantially change, H1', H2', and H3' exhibited significant changes en masse. Consequently, the CycT1 residues involved in Tat binding, namely Tat-recognition residues (TRRs), lost their flexibility with the addition of Tat to P-TEFb...
2017: PloS One
https://www.readbyqxmd.com/read/28152073/estimation-of-measurement-error-in-plasma-hiv-1-rna-assays-near-their-limit-of-quantification
#17
Viviane D Lima, Lu Wang, Chanson Brumme, Lang Wu, Julio S G Montaner, P Richard Harrigan
BACKGROUND: Plasma HIV-1 RNA levels (pVLs), routinely used for clinical management, are influenced by measurement error (ME) due to physiologic and assay variation. OBJECTIVE: To assess the ME of the COBAS HIV-1 Ampliprep AMPLICOR MONITOR ultrasensitive assay version 1.5 and the COBAS Ampliprep Taqman HIV-1 assay versions 1.0 and 2.0 close to their lower limit of detection. Secondly to examine whether there was any evidence that pVL measurements closest to the lower limit of quantification, where clinical decisions are made, were susceptible to a higher degree of random noise than the remaining range...
2017: PloS One
https://www.readbyqxmd.com/read/28148791/replication-capacity-of-viruses-from-acute-infection-drives-hiv-1-disease-progression
#18
Philippe Selhorst, Carina Combrinck, Nonkululeko Ndabambi, Sherazaan D Ismail, Melissa-Rose Abrahams, Miguel Lacerda, Natasha Samsunder, Nigel Garrett, Quarraisha Abdool Karim, Salim S Abdool Karim, Carolyn Williamson
Viral genotype has been shown to play an important role in HIV pathogenesis following transmission. However, the viral phenotypic properties that contribute to disease progression remain unclear. Most studies have been limited to the evaluation of Gag function in the context of a recombinant virus backbone. Using this approach, important biological information may be lost making the evaluation of viruses obtained during acute infection, representing the transmitted virus, a more biologically relevant model...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28145050/cytochrome-2b6-polymorphism-and-efavirenz-induced-central-nervous-system-symptoms-a-substudy-of-the-anrs-alize-trial
#19
S Gallien, V Journot, M-A Loriot, H Sauvageon, P Morlat, J Reynes, V Reliquet, G Chêne, J-M Molina
OBJECTIVES: Single nucleotide polymorphisms in the cytochrome P450 (CYP) 2B6 gene have been associated with high interindividual variation in efavirenz pharmacokinetics. However, clinical data on the relationship of CYP2B6 polymorphisms with the occurrence of efavirenz-induced central nervous system (CNS) symptoms are limited. METHODS: We analysed four polymorphisms in the CYP2B6 (516 G>T), CYP3A5 (6986 A>G) and ATP-binding cassette, sub-family B, member 1 (ABCB1) (2677 G>T/A and 3435 C>T) genes in HIV-infected adults virologically suppressed on a protease inhibitor-based regimen who switched to a regimen containing emtricitabine, didanosine and efavirenz in the setting of the ANRS ALIZE trial...
February 1, 2017: HIV Medicine
https://www.readbyqxmd.com/read/28127362/molecular-characterization-of-trichomonas-vaginalis-strains-based-on-identifying-their-probable-variations-in-asymptomatic-patients
#20
Adel Spotin, Sanaz Taghizadeh Eghtedar, Abbas Shahbazi, Asghar Salehpour, Seddigheh Sarafraz, Seyyed Ali Shariatzadeh, Mahmoud Mahami-Oskouei
BACKGROUND: The aim of this study was to identify the Trichomonas vaginalis strains/haplotypes based on identifying their probable variations in asymptomatic patients referred to Tabriz health centers, northwestern Iran. METHODS: Sampling was taken from 50-suspected women to T. vaginalis in northwestern Iran. The obtained samples were smeared and cultured. Fifty DNA samples were extracted, amplified and identified by nested polymerase chain reaction and PCR-RFLP of actin gene using two endonuclease enzymes: MseI and RsaI...
October 2016: Iranian Journal of Parasitology
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