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https://www.readbyqxmd.com/read/28934310/sanger-and-next-generation-sequencing-data-for-characterization-of-ctl-epitopes-in-archived-hiv-1-proviral-dna
#1
Camille Tumiotto, Lionel Riviere, Pantxika Bellecave, Patricia Recordon-Pinson, Alice Vilain-Parce, Gwenda-Line Guidicelli, Hervé Fleury
One of the strategies for curing viral HIV-1 is a therapeutic vaccine involving the stimulation of cytotoxic CD8-positive T cells (CTL) that are Human Leucocyte Antigen (HLA)-restricted. The lack of efficiency of previous vaccination strategies may have been due to the immunogenic peptides used, which could be different from a patient's virus epitopes and lead to a poor CTL response. To counteract this lack of specificity, conserved epitopes must be targeted. One alternative is to gather as many data as possible from a large number of patients on their HIV-1 proviral archived epitope variants, taking into account their genetic background to select the best presented CTL epitopes...
2017: PloS One
https://www.readbyqxmd.com/read/28933049/pragmatic-combination-of-available-diagnostic-tools-for-optimal-detection-of-intestinal-microsporidia
#2
Stuti Kaushik, Rumpa Saha, Shukla Das, V G Ramachandran, Ashish Goel
Diarrhea is a debilitating condition in HIV infected individuals and with the finding that almost 1/4 cases of diarrhea in HIV are due to microsporidia, there is a dire need to institute measures for its detection on a regular basis. Keeping this in mind the study aims to determine the burden of intestinal microsporidiosis in HIV seropositive patients presenting with and without diarrhea and to compare the ability of microscopy and PCR in its detection.The study group consisted of 120 patients divided into four groups HIV seropositive with/without diarrhea, and HIV seronegative with/without diarrhea...
September 13, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28931681/insights-into-the-impact-of-cd8-immune-modulation-on-hiv-evolutionary-dynamics-in-distinct-anatomical-compartments-using-siv-infected-macaque-models-of-aids-progression
#3
Brittany Rife Magalis, David J Nolan, Patrick Autissier, Tricia H Burdo, Kenneth C Williams, Marco Salemi
A thorough understanding of the role of HIV intra-host evolution in AIDS pathogenesis has been limited by the need for longitudinally sampled viral sequences from the vast target space within the host, which are often difficult to obtain from human subjects. CD8+ lymphocyte-depleted macaques infected with simian immunodeficiency virus (SIV) provide an increasingly utilized model of pathogenesis due to similar clinical manifestations as HIV-1 infection and AIDS progression, as well as characteristic rapid disease onset...
September 20, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28926561/mechanisms-of-accelerated-liver-fibrosis-in-hiv-hcv-coinfection
#4
Theofilos Chrysanthidis, Georgia Loli, Simeon Metallidis, Georgios Germanidis
Although there is evidence that HCV progresses rapidly in HIV/HCV coinfected patients in comparison with HCV monoinfected, the HIV-, HCV- and host/genetic-related factors, as well as the exact mechanisms implicated in this process are not fully elucidated. Furthermore, cure of HCV in those coinfected seems possible with the new antiviral drugs, but high cost as well as insufficient identification, linkage with care and treatment hamper the achievement of this goal. Research on the subject, could reveal an important prognostic marker for the effectiveness of persuasion of patients with HIV/HCV coinfection with a predicted accelerated fibrosis course, in order to facilitate and prioritize, not in terms of guidelines but in the real life situation, their treatment with a medically just framework...
September 19, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28926560/hiv-and-hcv-in-u-s-prisons-and-jails-the-correctional-facility-as-a-bellwether-over-time-for-the-community-s-infections
#5
Anne C Spaulding, Emeli J Anderson, Mohammed A Khan, Cesar A Taborda-Vidarte, Jennifer A Phillips
Screening and treating correctional populations for HIV and HCV infections is essential to successfully addressing both epidemics in the USA. The prevalence of HIV and HCV infection is high in prisons and jails due to increased rates of incarceration among disproportionately affected groups such as injection drug users. Through a search of the published and grey literature and surveying persons overseeing health programs in prisons, we collected data on efforts to determine prevalence first for HIV and then for HCV...
September 19, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28918646/depletion-of-gut-resident-ccr5-cells-for-hiv-cure-strategies
#6
David Patrick Merriam, Connie Chen, Gema Mendez-Lagares, Kenneth Rogers, Anthony Michaels, Jiangli Yan, Paul Casaz, Keith Reimann, Francois Villenger, Dennis J Hartigan-O'Connor
The HIV reservoir forming at the earliest stages of infection is likely composed of CCR5+ cells, because these cells are the targets of transmissible virus. Restriction of the CCR5+ reservoir, particularly in gut, may be needed for subsequent cure attempts. Strategies for killing or depleting CCR5+ cells have been described, but none have been tested in vivo in non-human primates and the extent of achievable depletion from tissues is not known. Here we investigate the efficacy of two novel cytotoxic treatments for targeting and eliminating CCR5+ cells in young rhesus macaques...
September 17, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28904745/genome-editing-of-the-hiv-co-receptors-ccr5-and-cxcr4-by-crispr-cas9-protects-cd4-t-cells-from-hiv-1-infection
#7
Zhepeng Liu, Shuliang Chen, Xu Jin, Qiankun Wang, Kongxiang Yang, Chenlin Li, Qiaoqiao Xiao, Panpan Hou, Shuai Liu, Shaoshuai Wu, Wei Hou, Yong Xiong, Chunyan Kong, Xixian Zhao, Li Wu, Chunmei Li, Guihong Sun, Deyin Guo
BACKGROUND: The main approach to treat HIV-1 infection is combination antiretroviral therapy (cART). Although cART is effective in reducing HIV-1 viral load and controlling disease progression, it has many side effects, and is expensive for HIV-1 infected patients who must remain on lifetime treatment. HIV-1 gene therapy has drawn much attention as studies of genome editing tools have progressed. For example, zinc finger nucleases (ZFN), transcription activator like effector nucleases (TALEN) and clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 have been utilized to successfully disrupt the HIV-1 co-receptors CCR5 or CXCR4, thereby restricting HIV-1 infection...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28903736/factors-associated-with-syphilis-treatment-failure-and-reinfection-a-longitudinal-cohort-study-in-shenzhen-china
#8
Zhenzhou Luo, Lin Zhu, Yi Ding, Jun Yuan, Wu Li, Qiuhong Wu, Lishan Tian, Li Zhang, Guomao Zhou, Tao Zhang, Jianping Ma, Zhongwei Chen, Tubao Yang, Tiejian Feng, Min Zhang
BACKGROUND: The treatment failure and reinfection rates among syphilis patients are high, and relevant studies in China are limited. The aim of this study was to detect the rates of treatment failure and reinfection after syphilis treatment and to explore the potential associated factors. METHODS: We conducted a longitudinal cohort study in a sexually transmitted disease clinic, the Department of Dermatology and Venereology in Nanshan Center for Chronic Disease Control...
September 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28901347/-soppressione-virologica-di-hbv-e-sviluppo-di-hcc-descrizione-di-un-caso-clinico-seguito-per-15-anni
#9
Tullio Prestileo, Francesco Di Lorenzo, Adriana Sanfilippo, Claudia Imburgia, Giuseppe Cabibbo, Salvatore Corrao
Riassunto. Tra le persone infette da HIV in tutto il mondo, tra i 2 e i 4 milioni presentano coinfezione da HBV. Questo caso clinico descrive i 15 anni di malattia di un paziente coinfettato da HBV-HIV, che ha sviluppato HCC nonostante la piena aderenza ai trattamenti e la completa soppressione virale. Nostro obiettivo è segnalare agli infettivologi il possibile sviluppo di HCC indipendentemente, nonostante l'adesione alle cure e la completa soppressione virale.
September 2017: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/28899104/therapeutic-vaccine-against-hiv-viral-variability-ctl-epitopes-and-genetics-of-patients
#10
Herve J Fleury, Camille Tumiotto, Pantxika Bellecave, Patricia Recordon-Pinson
The scientific and medical community is seeking to cure HIV. Several pathways have been or are being explored including therapeutic vaccination. Viro-immunological studies on primary infection as well as on elite controllers have demonstrated the importance of the cytotoxic CD8 response and have mainly oriented research on vaccine constructs towards this type of response. The results of these trials are clearly not commensurate with the hope placed in them. Might there be one or more uncontrolled variables? The genetics of patients need to be taken into consideration, especially their HLA alleles...
September 13, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28895059/central-nervous-system-penetrating-antiretrovirals-impair-energetic-reserve-in-striatal-nerve-terminals
#11
Kelly L Stauch, Katy Emanuel, Benjamin G Lamberty, Brenda Morsey, Howard S Fox
The use of antiretroviral (ARV) drugs with central nervous system (CNS) penetration effectiveness (CPE) may be useful in the treatment of HIV-associated neurocognitive disorder (HAND) as well as targeting a CNS reservoir in strategies to achieve a functional cure for HIV. However, increased cognitive deficits are linked to at least one of these drugs (efavirenz). As mitochondrial dysfunction has been found with a number of ARVs, and as such can affect neuronal function, the objective of this study was to assess the effects of ARV with high CPE for toxicological profiles on presynaptic nerve terminal energy metabolism...
September 11, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28894444/modeling-kick-kill-strategies-toward-hiv-cure
#12
REVIEW
Esteban A Hernandez-Vargas
Although combinatorial antiretroviral therapy (cART) potently suppresses the virus, a sterile or functional cure still remains one of the greatest therapeutic challenges worldwide. Reservoirs are infected cells that can maintain HIV persistence for several years in patients with optimal cART, which is a leading obstacle to eradicate the virus. Despite the significant progress that has been made in our understanding of the diversity of cells that promote HIV persistence, many aspects that are critical to the development of effective therapeutic approaches able to purge the latent CD4+ T cell reservoir are poorly understood...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28893294/hiv-i-nef-inhibitors-a-novel-class-of-hiv-specific-immune-adjuvants-in-support-of-a-cure
#13
REVIEW
Gregory A Dekaban, Jimmy D Dikeakos
The success of many current vaccines relies on a formulation that incorporates an immune activating adjuvant. This will hold true for the design of a successful therapeutic HIV vaccine targeted at controlling reactivated virus following cessation of combined antiretroviral therapy (cART). The HIV accessory protein Nef functions by interfering with HIV antigen presentation through the major histocompatibility complex I (MHC-I) pathway thereby suppressing CD8(+) cytotoxic T cell (CTL)-mediated killing of HIV infected cells...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28893281/rna-flow-cytometric-fish-for-investigations-into-hiv-immunology-vaccination-and-cure-strategies
#14
REVIEW
Amy E Baxter, Julia Niessl, Antigoni Morou, Daniel E Kaufmann
Despite the tremendous success of anti-retroviral therapy (ART) no current treatment can eradicate latent HIV reservoirs from HIV-infected individuals or generate, effective HIV-specific immunity. Technological limitations have hampered the identification and characterization of both HIV-infected cells and HIV-specific responses in clinical samples directly ex vivo. RNA-flow cytometric fluorescence in situ hybridisation (RNA Flow-FISH) is a powerful technique, which enables detection of mRNAs in conjunction with proteins at a single-cell level...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28893280/eradication-of-hiv-1-latent-reservoirs-through-therapeutic-vaccination
#15
REVIEW
Joshua Pankrac, Katja Klein, Jamie F S Mann
Despite the significant success of combination anti-retroviral therapy to reduce HIV viremia and save lives, HIV-1 infection remains a lifelong infection that must be appropriately managed. Advances in the understanding of the HIV infection process and insights from vaccine development in other biomedical fields such as cancer, imaging, and genetic engineering have fueled rapid advancements in HIV cure research. In the last few years, several studies have focused on the development of "Kick and Kill" therapies to reverse HIV latency and kick start viral translational activity...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28893274/modulation-of-the-strength-and-character-of-hiv-specific-cd8-t-cell-responses-with-heteroclitic-peptides
#16
REVIEW
Kayla A Holder, Michael D Grant
Chronic infection with human immunodeficiency virus (HIV) causes HIV-specific CD8(+) T cell dysfunction and exhaustion. The strong association between non-progression and maintenance of HIV-specific CD8(+) T cell cytokine production and proliferative capacities suggests that invigorating CD8(+) T cell immune responses would reduce viremia and slow disease progression. A series of studies have demonstrated that sequence variants of native immunogenic peptides can generate more robust CD8(+) T cell responses and that stimulation with these 'heteroclitic' peptides can steer responses away from the phenotypic and functional attributes of exhaustion acquired during chronic HIV infection...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28892313/-hiv-cure-a-realistic-perspective
#17
G Darcis, M Moutschen
More than 30 years after its discovery, human immunodeficiency virus (HIV) continues to be a major global public health issue. Antiretroviral therapy increases survival and quality of life of HIV-infected patients but is not curative. Indeed, interruption of therapy invariably leads to the re-emergence of detectable viral replication, since HIV persists in extremely long-lived viral latent reservoirs. Those viral latent reservoirs constitute the major source of viral recovery following antiretroviral treatment interruption and are considered as the most important hurdle to HIV eradication...
September 2017: Revue Médicale de Liège
https://www.readbyqxmd.com/read/28891813/no-evidence-of-hiv-replication-in-children-on-antiretroviral-therapy
#18
Gert U Van Zyl, Mary Grace Katusiime, Ann Wiegand, William R McManus, Michael J Bale, Elias K Halvas, Brian Luke, Valerie F Boltz, Jonathan Spindler, Barbara Laughton, Susan Engelbrecht, John M Coffin, Mark F Cotton, Wei Shao, John W Mellors, Mary F Kearney
It remains controversial whether current antiretroviral therapy (ART) fully suppresses the cycles of HIV replication and viral evolution in vivo. If replication persists in sanctuary sites such as the lymph nodes, a high priority should be placed on improving ART regimes to target these sites. To investigate the question of ongoing viral replication on current ART regimens, we analyzed HIV populations in longitudinal samples from 10 HIV-1-infected children who initiated ART when viral diversity was low. Eight children started ART at less than ten months of age and showed suppression of plasma viremia for seven to nine years...
September 11, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28891344/when-the-cure-is-the-risk-understanding-how-substance-use-affects-hiv-and-hcv-in-a-layered-risk-environment-in-san-juan-puerto-rico
#19
Diana Hernández, Pedro C Castellón, Yohansa Fernández, Francisco A Torres-Cardona, Carrigan Parish, Danielle Gorshein, Jose Vargas Vidot, Sandra Miranda de Leon, Allan Rodriguez, Jorge Santana Bagur, Daniel J Feaster, Bruce R Schackman, Lisa R Metsch
BACKGROUND: Substance use, particularly injection drug use, continues to fuel the HIV/HCV (hepatitis C virus) epidemics in San Juan, Puerto Rico (PR). AIM: This article examines individual and sociostructural factors that affect HIV/HCV risk among people who use drugs (PWUD) living with or at risk for HIV/HCV in San Juan, PR. Findings were used to inform a community-level intervention to enhance HIV care access and retention for this population. METHOD: A rapid ethnographic assessment in collaboration with a community-based organization was conducted...
September 1, 2017: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/28891318/-what-would-an-hiv-cure-mean-to-you-qualitative-analysis-from-a-crowdsourcing-contest-in-guangzhou-china
#20
Alice Zhang, Xin Pan, Feng Wu, Yang Zhao, Fengyu Hu, Linghua Li, Weiping Cai, Joseph D Tucker
Much HIV cure social science research has focused on high-income countries. Local key population perspectives, especially from people living with HIV (PLHIV), are needed in low-and middle-income countries (LMIC). We organized an open contest soliciting responses from key populations, including PLHIV, about what a cure would mean in their lives. Tailored in-person events and social media were used to engage PLHIV, men who have sex with men (MSM), people who inject drugs (PWID), and local residents. We received 471 contributions over four months...
September 11, 2017: AIDS Research and Human Retroviruses
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