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https://www.readbyqxmd.com/read/27911718/attacking-hiv-1-rna-versus-dna-by-sequence-specific-approaches-rnai-versus-crispr-cas
#1
REVIEW
Elena Herrera-Carrillo, Ben Berkhout
Human immunodeficiency virus type 1 (HIV-1) infection can be effectively controlled by potent antiviral drugs, but this never results in a cure. The patient should therefore take these drugs for the rest of his/her life, which can cause drug-resistance and adverse effects. Therefore, more durable therapeutic strategies should be considered, such as a stable gene therapy to protect the target T cells against HIV-1 infection. The development of potent therapeutic regimens based on the RNA interference (RNAi) and clustered regularly interspaced short palindromic repeats (CRISPR-Cas) mechanisms will be described, which can be delivered by lentiviral vectors...
October 15, 2016: Biochemical Society Transactions
https://www.readbyqxmd.com/read/27910750/antiretroviral-agents-looking-for-the-best-possible-chemotherapeutic-options-to-conquer-hiv
#2
Tahir Farooq, Arruje Hameed, Kanwal Rehman, Muhammad Ibrahim, Muhammad Imran Qadir, Muhammad Sajid Hamid Akash
For the last thirty years, ongoing efforts have revolutionized the antiretroviral therapy, which changed human immunodeficiency virus (HIV) infections from terrifying lethal diseases to chronic conditions. However, many challenges, like emergence of drug resistance, limited the scope of activity of currently existing anti-HIV agents. Quite often severe side effects and lifelong dependency are the major concerns of present era. All these issues have compelled the scientists to reconsider and refine the current therapies and also contemplate the pivotal priorities for the developments of novel therapeutic paradigms...
2016: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/27905840/combining-cell-and-gene-therapy-in-an-effort-to-eradicate-hiv
#3
Thor A Wagner
More than 30 million people are infected with HIV, and HIV remains the fifth leading cause of disability-adjusted life years worldwide. Antiretroviral therapy (ART) dramatically decreases mortality rate, but there are side effects, long-term toxicities, expenses, stigmas, and inconveniences associated with chronic treatment, and HIV-infected individuals on ART have an increased risk of malignancies, cardiovascular disease, neurologic disease, and shortened life expectancy. Therefore, a cure for HIV remains an important goal...
December 2016: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/27905839/gene-therapy-to-cure-hiv-where-to-from-here
#4
Rowena Johnston
A variety of approaches are being tested to cure HIV, but with the exception of the Berlin patient case, none has been successful. The Berlin patient, positive for both HIV and acute myeloid leukemia (AML), received two stem cell transplants from a donor homozygous for the CCR5delta32 mutation. In the 8 years since his second transplant, he has remained free of both HIV and AML. This case provides strong proof-of-principle that a cure for HIV is possible and might be achieved through gene therapy. Several technological barriers must be resolved and are discussed here, including the safe delivery of the intervention throughout the body of the infected person, increased efficiency of gene editing, and avoidance of resistance to the therapy...
December 2016: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/27905838/engineering-hiv-specific-immunity-with-chimeric-antigen-receptors
#5
Scott G Kitchen, Jerome A Zack
HIV remains a highly important public health and clinical issue despite many recent advances in attempting to develop a cure, which has remained elusive for most people infected with HIV. HIV disease can be controlled with pharmacologic therapies; however, these treatments are expensive, may have severe side effects, and are not curative. Consequently, an improved means to control or eliminate HIV replication is needed. Cytotoxic T lymphocytes (CTLs) play a critical role in controlling viral replication and are an important part in the ability of the immune response to eradicate most viral infections...
December 2016: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/27901445/no-more-militaristic-and-violent-language-in-medicine-response-to-open-peer-commentaries-on-healing-without-waging-war-beyond-military-metaphors-in-medicine-and-hiv-cure-research
#6
Jing-Bao Nie, Stuart Rennie, Adam Gilbertson, Joseph D Tucker
No abstract text is available yet for this article.
December 2016: American Journal of Bioethics: AJOB
https://www.readbyqxmd.com/read/27900346/preclinical-development-and-qualification-of-zfn-mediated-ccr5-disruption-in-human-hematopoietic-stem-progenitor-cells
#7
David L DiGiusto, Paula M Cannon, Michael C Holmes, Lijing Li, Anitha Rao, Jianbin Wang, Gary Lee, Philip D Gregory, Kenneth A Kim, Samuel B Hayward, Kathleen Meyer, Colin Exline, Evan Lopez, Jill Henley, Nancy Gonzalez, Victoria Bedell, Rodica Stan, John A Zaia
Gene therapy for HIV-1 infection is a promising alternative to lifelong combination antiviral drug treatment. Chemokine receptor 5 (CCR5) is the coreceptor required for R5-tropic HIV-1 infection of human cells. Deletion of CCR5 renders cells resistant to R5-tropic HIV-1 infection, and the potential for cure has been shown through allogeneic stem cell transplantation with naturally occurring homozygous deletion of CCR5 in donor hematopoietic stem/progenitor cells (HSPC). The requirement for HLA-matched HSPC bearing homozygous CCR5 deletions prohibits widespread application of this approach...
2016: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/27898737/transcriptomic-analysis-implicates-the-p53-signaling-pathway-in-the-establishment-of-hiv-1-latency-in-central-memory-cd4-t-cells-in-an-in-vitro-model
#8
Cory H White, Bastiaan Moesker, Nadejda Beliakova-Bethell, Laura J Martins, Celsa A Spina, David M Margolis, Douglas D Richman, Vicente Planelles, Alberto Bosque, Christopher H Woelk
The search for an HIV-1 cure has been greatly hindered by the presence of a viral reservoir that persists despite antiretroviral therapy (ART). Studies of HIV-1 latency in vivo are also complicated by the low proportion of latently infected cells in HIV-1 infected individuals. A number of models of HIV-1 latency have been developed to examine the signaling pathways and viral determinants of latency and reactivation. A primary cell model of HIV-1 latency, which incorporates the generation of primary central memory CD4 T cells (TCM), full-length virus infection (HIVNL4-3) and ART to suppress virus replication, was used to investigate the establishment of HIV latency using RNA-Seq...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27898594/hiv-cure-strategists-ignore-the-central-nervous-system-at-your-patients-peril
#9
Stephen A Spector, Jay Rappaport
No abstract text is available yet for this article.
January 2, 2017: AIDS
https://www.readbyqxmd.com/read/27898590/reactivation-of-simian-immunodeficiency-virus-reservoirs-in-the-brain-of-virally-suppressed-macaques
#10
Lucio Gama, Celina M Abreu, Erin N Shirk, Sarah L Price, Ming Li, Greg M Laird, Kelly A Metcalf Pate, Stephen W Wietgrefe, Shelby L O'Connor, Luiz Pianowski, Ashley T Haase, Carine Van Lint, Robert F Siliciano, Janice E Clements
OBJECTIVE: Resting CD4 T cells have been recognized as the major cell reservoir of latent HIV-1 during antiretroviral therapy (ART). Using an simian immunodeficiency virus (SIV)/macaque model for AIDS and HIV-related neurocognitive disorders we assessed the contribution of the brain to viral latency and reactivation. DESIGN: Pigtailed macaques were dual inoculated with SIVDeltaB670 and SIV17E-Fr and treated with an efficacious central nervous system-penetrant ART...
January 2, 2017: AIDS
https://www.readbyqxmd.com/read/27898045/dendritic-cell-based-immunotherapies-to-fight-hiv-how-far-from-a-success-story-a-systematic-review-and-meta-analysis
#11
REVIEW
Antonio Victor Campos Coelho, Ronald Rodrigues de Moura, Anselmo Jiro Kamada, Ronaldo Celerino da Silva, Rafael Lima Guimarães, Lucas André Cavalcanti Brandão, Luiz Cláudio Arraes de Alencar, Sergio Crovella
The scientific community still faces the challenge of developing strategies to cure HIV-1. One of these pursued strategies is the development of immunotherapeutic vaccines based on dendritic cells (DCs), pulsed with the virus, that aim to boost HIV-1 specific immune response. We aimed to review DCs-based therapeutic vaccines reports and critically assess evidence to gain insights for the improvement of these strategies. We performed a systematic review, followed by meta-analysis and meta-regression, of clinical trial reports...
November 26, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27892847/international-adoption-from-ethiopia-an-overview-of-the-health-status-at-arrival-in-belgium
#12
Lydia Van Kesteren, Marek Wojciechowski
BACKGROUND: Ethiopia is a densely populated country with a fast growing economy. Still socioeconomic and health issues render many children parentless. One thousand and twenty eight Ethiopian children have been adopted in Belgium from September 2005 to September 2015. Little has been published about their health status at arrival. METHODS: Three hundred and fifteen children adopted from Ethiopia were clinically evaluated at the Institute of Tropical Medicine in Antwerp from 1 January 2008 until 31 December 2014...
November 28, 2016: Acta Clinica Belgica
https://www.readbyqxmd.com/read/27889530/identification-of-proximal-biomarkers-of-pkc-agonism-and-evaluation-of-their-role-in-hiv-reactivation
#13
Sai Vikram Vemula, Jill W Maxwell, Alexey Nefedov, Bang-Lin Wan, Justin Steve, William Newhard, Rosa I Sanchez, David Tellers, Richard J Barnard, Wade Blair, Daria Hazuda, Andrea L Webber, Bonnie J Howell
DESIGN: The HIV latent CD4(+) T cell reservoir is broadly recognized as a barrier to HIV cure. Induction of HIV expression using protein kinase C (PKC) agonists is one approach under investigation for reactivation of latently infected CD4(+) T cells (Beans et al., 2013; Abreu et al., 2014; Jiang et al., 2014; Jiang and Dandekar, 2015). We proposed that an increased understanding of the molecular mechanisms of action of PKC agonists was necessary to inform on biological signaling and pharmacodynamic biomarkers...
November 23, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27881659/glycosyl-phosphatidylinositol-gpi-anchored-anti-hiv-scfv-efficiently-protect-cd4-t-cells-from-hiv-1-infection-and-deletion-in-hu-pbl-mice
#14
Chaobaihui Ye, Weiming Wang, Liang Cheng, Guangming Li, Michael Wen, Qi Wang, Qing Zhang, Dan Li, Paul Zhou, Lishan Su
: Despite the success in viral inhibition and CD4 T cell recovery by highly active antiretroviral treatment (HAART), HIV-1 is still not curable due to the persistence of HIV-1 reservoir during treatment. One patient with acute myeloid leukemia who received allogeneic hematopoietic stem cell transplantation from homozygous CCR5 Δ32 donor has had no detectable viremia for 9 years after HAART cessation. This case has inspired a field of HIV-1 cure research focusing on engineering HIV-1 resistance of permissive cells...
November 23, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27879457/protective-efficacy-of-secondary-prophylaxis-against-visceral-leishmaniasis-in-human-immunodeficiency-virus-coinfected-patients-over-the-past-10-years-in-eastern-india
#15
Rama P Goswami, Rudra P Goswami, Ayan Basu, Yogiraj Ray, Mehebubar Rahman, Santanu K Tripathi
Coinfection with visceral leishmaniasis (VL) and human immunodeficiency virus (HIV) leads to frequent treatment failure, relapse, and death. In this retrospective analysis from eastern India (2005-2015), our primary objective was to ascertain the protective efficacy of secondary prophylaxis with monthly amphotericin B (AmB) given in patients with HIV-VL coinfection toward reducing relapse and mortality rates. The secondary objective was to compare clinical features, laboratory findings, and treatment outcomes in HIV-VL patients in contrast to VL monoinfection...
November 22, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27875835/the-relevance-of-palliative-care-in-hiv-and-aging
#16
Jacqueline Shorthill, Rosanna F DeMarco
The connection between palliative care and HIV infection has deep and wide roots in the United States that go back to the time when many gay men in the early 1980s were dying from a disease we knew little about, and there was no way to help but to alleviate symptoms in hospice and end of life centers across the United States. More individuals (adults and children), families, and communities attribute the success of antiretroviral therapies and other therapeutic approaches to advancing quality of life and life itself today...
2017: Interdisciplinary Topics in Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27872306/paired-quantitative-and-qualitative-assessment-of-the-replication-competent-hiv-1-reservoir-and-comparison-with-integrated-proviral-dna
#17
Julio C C Lorenzi, Yehuda Z Cohen, Lillian B Cohn, Edward F Kreider, John P Barton, Gerald H Learn, Thiago Oliveira, Christy L Lavine, Joshua A Horwitz, Allison Settler, Mila Jankovic, Michael S Seaman, Arup K Chakraborty, Beatrice H Hahn, Marina Caskey, Michel C Nussenzweig
HIV-1-infected individuals harbor a latent reservoir of infected CD4(+) T cells that is not eradicated by antiretroviral therapy (ART). This reservoir presents the greatest barrier to an HIV-1 cure and has remained difficult to characterize, in part, because the vast majority of integrated sequences are defective and incapable of reactivation. To characterize the replication-competent reservoir, we have combined two techniques, quantitative viral outgrowth and qualitative sequence analysis of clonal outgrowth viruses...
November 21, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27870832/position-effects-influence-hiv-latency-reversal
#18
Heng-Chang Chen, Javier P Martinez, Eduard Zorita, Andreas Meyerhans, Guillaume J Filion
The main obstacle to curing HIV is the presence of latent proviruses in the bodies of infected patients. The partial success of reactivation therapies suggests that the genomic context of integrated proviruses can interfere with treatment. Here we developed a method called Barcoded HIV ensembles (B-HIVE) to map the chromosomal locations of thousands of individual proviruses while tracking their transcriptional activities in an infected cell population. B-HIVE revealed that, in Jurkat cells, the expression of HIV is strongest close to endogenous enhancers...
November 21, 2016: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/27869733/antiviral-therapy-by-hiv-1-broadly-neutralizing-and-inhibitory-antibodies
#19
REVIEW
Zhiqing Zhang, Shaowei Li, Ying Gu, Ningshao Xia
Human immunodeficiency virus type 1 (HIV-1) infection causes acquired immune deficiency syndrome (AIDS), a global epidemic for more than three decades. HIV-1 replication is primarily controlled through antiretroviral therapy (ART) but this treatment does not cure HIV-1 infection. Furthermore, there is increasing viral resistance to ART, and side effects associated with long-term therapy. Consequently, there is a need of alternative candidates for HIV-1 prevention and therapy. Recent advances have discovered multiple broadly neutralizing antibodies against HIV-1...
November 18, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27855263/disruption-or-excision-of-provirus-as-an-approach-to-hiv-cure
#20
Keith R Jerome
An effective approach to HIV cure will almost certainly require a combination of strategies, including some means of reducing the latent HIV reservoir. Because the integrated HIV provirus represents the major source of viral persistence and reactivation, one attractive approach is the direct targeting of provirus for disruption or excision using targeted endonucleases, such as CRISPR/Cas9, zinc finger nucleases, TAL effector nucleases, or meganucleases (homing endonucleases). This article highlights some of the challenges for successful endonuclease therapy for HIV, including optimization of enzyme activity and specificity, the possible emergence of viral resistance, and most importantly, efficient in vivo delivery of the enzymes to a sufficient portion of the latent reservoir...
December 2016: AIDS Patient Care and STDs
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