Resistencia transmitida de VIH-1 en pacientes sin exposición a tratamiento antirretroviral: Guatemala / Transmitted HIV-1 resistance in patients without exposure to antiretroviral treatment: Guatemala / Resistência transmitida ao HIV-1 em pacientes sem exposição ao tratamento antirretroviral: Guatemala

El objetivo del estudio fue describir los niveles de resistencia transmitida de VIH-1 en adultos atendidos en Unidades de Atención Integral de Guatemala. El estudio incluyó registros de 185 pacientes adultos VIH-1 positivo, de reciente diagnóstico sin antecedente de uso de TAR, de noviembre del 2019 a noviembre del 2020. El análisis se realizó en el software DeepChek® v2.0, para la clasificación de la resistencia se siguió el algoritmo de Stanford HIVdb (v9.4 - 07/12/2022). Se encontró 18.4% (IC 95% 13.1 - 24.7%) de resistencia general a alguna familia de ARVs. Se evidenció 15.1% (IC 95% 10.3 - 21.1%) de resistencia individual a la familia de INNTR afectando principalmente a NVP y EFV; 2.2% (IC 95% 0.6 - 5.4%) de resistencia a INTR, mayormente a FTC/3TC; y 2.7% (IC 95% 0.9 - 6.2%) de resistencia intermedia y baja los IP NFV y LPV/r. Tres casos presentaron resistencia múltiple a los INTR + INNTR. Las mutaciones más frecuentemente encontradas fueron K103N (41.2%), M184V/I (8.8%) y M46I (5.9%). La elevada resistencia transmitida del VIH-1 en pacientes atendidos en distintas Unidades de Atención Integral del VIH, demuestra la importancia de analizar periódicamente la tendencia de la resistencia en personas que no han estado expuestas a ARVs, lo cual a su vez es un marcador indirecto de presencia de resistencia adquirida en el país, datos que evidencian la necesidad de acciones e intervenciones prontas y efectivas dado su impacto en la salud pública.

The objective of this study was to describe the levels of transmitted HIV-1 resistance in patients with a recent HIV diagnosis before starting ART, treated in Comprehensive Care Units in Guatemala during the years 2019 and 2020. The study included records of 185 HIV-positive adult patients, recently diagnosed with HIV without a history of ART use. The analysis was carried out in the DeepChek® v2.0 software, the Stanford HIVdb algorithm (v9.4 - 07/12/2022) was followed to classify resistance. 18.4% (95% CI 13.1 - 24.7%) of general resistance to some family of ARVs was found. There was evidence of 15.1% (95% CI 10.3 - 21.1%) of individual resistance to the NNRTI family, mainly affecting NVP and EFV; 2.2% (95% CI 0.6 - 5.4%) resistance to INTR, mostly to FTC/3TC; and 2.7% (95% CI 0.9 - 6.2%) of intermediate and low resistance IP NFV and LPV/r. Three cases presented multiple resistance to NRTIs + NNRTIs. The most frequently found mutations were K103N (41.2%), M184V/I (8.8%) and M46I (5.9%). The high transmitted resistance of HIV-1 in patients treated in different Comprehensive HIV Care Units demonstrates the importance of periodically analyzing the trend of resistance in people who have not been exposed to ARVs, which in turn is an indirect marker. of the presence of acquired resistance in the country, data that demonstrate the need for prompt and effective actions and interventions given its impact on public health.

O objetivo deste estudo foi descrever os níveis de resistência transmitida ao HIV-1 em adultos tratados em Unidades de Cuidados Integrais na Guatemala. O estudo incluiu prontuários de 185 pacientes adultos HIV-1 positivos, recentemente diagnosticados sem histórico de uso de TARV, no período de novembro de 2019 a novembro de 2020. A análise foi realizada no software DeepChek® v2.0, para classificação da resistência, O algoritmo Stanford HIVdb (v9.4 - 07/12/2022) foi seguido. Foi encontrada 18.4% (IC 95% 13.1 - 24.7%) de resistência geral a alguma família de ARVs. Houve evidência de 15.1% (IC 95% 10.3 - 21.1%) de resistência individual à família de NNRTI, afetando principalmente NVP e EFV; 2.2% (IC 95% 0.6 - 5.4%) resistência ao INTR, principalmente ao FTC/3TC; e 2.7% (IC 95% 0.9 - 6.2%) de resistência intermediária e baixa ao IP NFV e LPV/r. Três casos apresentaram resistência múltipla a NRTIs + NNRTIs. As mutações mais frequentemente encontradas foram K103N (41.2%), M184V/I (8.8%) e M46I (5.9%). A elevada resistência transmitida do HIV-1 em pacientes atendidos em diferentes Unidades de Cuidados Integrados ao HIV demonstra a importância de analisar periodicamente a tendência de resistência em pessoas que não foram expostas aos ARVs, o que por sua vez é um marcador indireto da presença de ARVs adquiridos. resistência no país, dados que demonstram a necessidade de ações e intervenções rápidas e eficazes dado o seu impacto na saúde pública.

Genetic Subtypes and Pretreatment Drug Resistance in the Newly Reported Human Immunodeficiency Virus-Infected Men Aged≥50 Years Old in Guangxi / 中国医学科学院学报

Objective To analyze the genetic subtypes of human immunodeficiency virus (HIV) and the prevalence of pretreatment drug resistance in the newly reported HIV-infected men in Guangxi. Methods The stratified random sampling method was employed to select the newly reported HIV-infected men aged≥50 years old in 14 cities of Guangxi from January to June in 2020.The pol gene of HIV-1 was amplified by nested reverse transcription polymerase chain reaction and then sequenced.The mutation sites associated with drug resistance and the degree of drug resistance were then analyzed. Results A total of 615 HIV-infected men were included in the study.The genetic subtypes of CRF01_AE,CRF07_BC,and CRF08_BC accounted for 57.4% (353/615),17.1% (105/615),and 22.4% (138/615),respectively.The mutations associated with the resistance to nucleoside reverse transcriptase inhibitors (NRTI),non-nucleoside reverse transcriptase inhibitors (NNRTI),and protease inhibitors occurred in 8 (1.3%),18 (2.9%),and 0 patients,respectively.M184V (0.7%) and K103N (1.8%) were the mutations with the highest occurrence rates for the resistance to NRTIs and NNRTIs,respectively.Twenty-two (3.6%) patients were resistant to at least one type of inhibitors.Specifically,4 (0.7%),14 (2.3%),4 (0.7%),and 0 patients were resistant to NRTIs,NNRTIs,both NRTIs and NNRTIs,and protease inhibitors,respectively.The pretreatment resistance to NNRTIs had much higher frequency than that to NRTIs (2.9% vs.1.3%;χ2=3.929,P=0.047).The prevalence of pretreatment resistance to lamivudine,zidovudine,tenofovir,abacavir,rilpivirine,efavirenz,nevirapine,and lopinavir/ritonavir was 0.8%, 0.3%, 0.7%, 1.0%, 1.3%, 2.8%, 2.9%, and 0, respectively. Conclusions CRF01_AE,CRF07_BC,and CRF08_BC are the three major strains of HIV-infected men≥50 years old newly reported in Guangxi,2020,and the pretreatment drug resistance demonstrates low prevalence.

Analysis of HIV-1 genetic subtype and pretreatment drug resistance among men who have sex with men infected with HIV-1 from 19 cities of 6 provinces in China / 中华流行病学杂志

Objective: To investigate the distribution of HIV-1 genetic subtypes and pretreatment drug resistance (PDR) among men who have sex with men (MSM) from 19 cities of 6 provinces in China. Methods: From April to November 2019, 574 plasma samples of ART-naive HIV-1 infected MSM were collected from 19 cities in Hebei, Shandong, Jiangsu, Zhejiang, Fujian, and Guangdong provinces, total ribonucleic acid (RNA) was extracted and amplified the HIV-1 pol gene region by nested polymerase chain reaction (PCR) after reverse transcription. Then sequences were used to construct a phylogenetic tree to determine genetic subtypes and submitted to the Stanford drug resistance database for drug resistance analysis. Results: A total of 479 samples were successfully amplified by PCR. The HIV-1 genetic subtypes included CRF01_AE, CRF07_BC, B, CRF55_01B, CRF59_01B, CRF65_cpx, CRF103_01B, CRF67_01B, CRF68_01B and unrecognized subtype, which accounted for 43.4%, 36.3%, 6.3%, 5.9%, 0.8%, 0.8%, 0.4%, 0.4%, 0.2% and 5.5%, respectively. The distribution of genetic subtypes among provinces is statistically different (χ2=44.141, P<0.001). The overall PDR rate was 4.6% (22/479), the drug resistance rate of non-nucleoside reverse transcriptase inhibitors, nucleoside reverse transcriptase inhibitors, and protease inhibitors were 3.5% (17/479), 0.8% (4/479) and 0.2% (1/479), respectively. The PDR rate of recent infections was significantly higher than that of long-term infections (χ2=4.634, P=0.031). Conclusions: The HIV-1 genetic subtypes among MSM infected with HIV-1 from 19 cities of 6 provinces in China are diverse, and the distribution of subtypes is different among provinces. The overall PDR rate is low, while the PDR rate of recent infections was significantly higher than that of long-term infections, suggesting the surveillance of PDR in recent infections should be strengthened.

Important pharmacogenomic aspects in the management of HIV/AIDS

In managing HIV/AIDS with highly active antiretroviral agents, the historical therapeutic aim remains to maintain the plasma concentrations at a level above the half maximal inhibitory concentration (IC50) required for 50% inhibition in viral replication.Concentration dependent toxicity is often observed in patients with elevated drug exposure and high peak plasma levels in lieu of accurately calculated drug dosages. Similarly lowplasmaconcentrationsarefrequently witnessed in individuals receiving adequate dosage regimens. Pharmacogenetic variations in drug metabolizing enzymes may contribute to this phenomenon.Over the last decade, knowledge about the role of pharmacogenetics in the treatment and prediction of ARV plasma levels have increased significantly. However, the extent of these genetic variations remain largely unknown in the South African population,which has sparked a renewed enthusiasm forlocalpharmacogenetic studies

Effectiveness, Safety, and Tolerability of a Switch to Dual Therapy with Dolutegravir Plus Cobicistat-Boosted Darunavir in Treatment-Experienced Patients with Human Immunodeficiency Virus

BACKGROUND: Dual regimen with dolutegravir plus cobicistat-boosted darunavir (DTG/DRV/c) is reasonable alternative option for patients with existing resistance and/or intolerance to nucleoside reverse transcriptase inhibitors (NRTIs). MATERIAL AND METHODS: All patients who switched to DTG/DRV/c among treatment-experienced patients with human immunodeficiency virus (HIV) in a tertiary university hospital were selected. We analyzed the effectiveness, safety, and tolerability based on serial laboratory data and clinical findings. The primary endpoint was defined as the proportion of patients with plasma HIV RNA below 50 copies/mL at week 48 after switch. Secondary endpoints included evaluation of safety and tolerability. RESULTS: Thirty-one patients were retrospectively analyzed. The main reasons for the change to DTG/DRV/c were treatment failure in 13 patients (41.9%), simplification in 12 patients (38.7%), and adverse drug reaction in 6 patients (19.4%). Among the 13 patients who switched owing to treatment failure, the proportion of patients in whom the viral loads were suppressed to less than 50 copies/mL increased from 0% at baseline to 45% at 4 weeks, 50% at 12 weeks, 50% at 24 weeks, and 66.7% at 48 weeks. HIV virus levels decreased and CD4⁺ T cell counts increased during the follow-up period. In non-treatment failure patients (18 patients), the levels of viral suppression and CD4⁺ T cells were maintained. There were no significant differences in renal function, liver function, glucose levels, and lipid profile before and after regimen changes. The tolerability was very good: 30 patients (96.8%) tolerated the drugs well and only 1 patient discontinued owing to no improvement in renal insufficiency. Two patients (6.4%) in treatment failure group failed to reach viral suppression. CONCLUSION: The use of DTG/DRV/c in HIV treatment-experienced patients appears to be a very good regimen for switch therapy that is effective and well tolerated, without significant adverse drug reaction.

Effectiveness, Safety, and Tolerability of a Switch to Dual Therapy with Dolutegravir Plus Cobicistat-Boosted Darunavir in Treatment-Experienced Patients with Human Immunodeficiency Virus

BACKGROUND: Dual regimen with dolutegravir plus cobicistat-boosted darunavir (DTG/DRV/c) is reasonable alternative option for patients with existing resistance and/or intolerance to nucleoside reverse transcriptase inhibitors (NRTIs). MATERIAL AND METHODS: All patients who switched to DTG/DRV/c among treatment-experienced patients with human immunodeficiency virus (HIV) in a tertiary university hospital were selected. We analyzed the effectiveness, safety, and tolerability based on serial laboratory data and clinical findings. The primary endpoint was defined as the proportion of patients with plasma HIV RNA below 50 copies/mL at week 48 after switch. Secondary endpoints included evaluation of safety and tolerability. RESULTS: Thirty-one patients were retrospectively analyzed. The main reasons for the change to DTG/DRV/c were treatment failure in 13 patients (41.9%), simplification in 12 patients (38.7%), and adverse drug reaction in 6 patients (19.4%). Among the 13 patients who switched owing to treatment failure, the proportion of patients in whom the viral loads were suppressed to less than 50 copies/mL increased from 0% at baseline to 45% at 4 weeks, 50% at 12 weeks, 50% at 24 weeks, and 66.7% at 48 weeks. HIV virus levels decreased and CD4⁺ T cell counts increased during the follow-up period. In non-treatment failure patients (18 patients), the levels of viral suppression and CD4⁺ T cells were maintained. There were no significant differences in renal function, liver function, glucose levels, and lipid profile before and after regimen changes. The tolerability was very good: 30 patients (96.8%) tolerated the drugs well and only 1 patient discontinued owing to no improvement in renal insufficiency. Two patients (6.4%) in treatment failure group failed to reach viral suppression. CONCLUSION: The use of DTG/DRV/c in HIV treatment-experienced patients appears to be a very good regimen for switch therapy that is effective and well tolerated, without significant adverse drug reaction.

Influence of Phosphatidylinositol-3-Kinase/Protein Kinase B-Mammalian Target of Rapamycin Signaling Pathway on the Neuropathic Pain Complicated by Nucleoside Reverse Transcriptase Inhibitors for the Treatment of HIV Infection / 中华医学杂志(英文版)

Background@#Nucleoside reverse transcriptase inhibitors (NRTIs) are the earliest and most commonly used anti-human immunodeficiency virus drugs and play an important role in high active antiretroviral therapy. However, NRTI drug therapy can cause peripheral neuropathic pain. In this study, we aimed to investigate the mechanisms of rapamycin on the pain sensitization of model mice by in vivo experiments to explore the effect of mammalian target of rapamycin (mTOR) in the pathogenesis of neuropathic pain caused by NRTIs.@*Methods@#Male Kun Ming (KM) mice weighing 20-22 g were divided into control, 2 mg/kg rapamycin, 12 mg/kg stavudine, and CMC-Na groups. Drugs were orally administered to mice for 42 consecutive days. The von Frey filament detection and thermal pain tests were conducted on day 7, 14, 21, 28, 35, and 42 after drug administration. After the last behavioral tests, immunohistochemistry and western blotting assay were used for the measurement of mTOR and other biomarkers. Multivariate analysis of variance was used.@*Results@#The beneficial effects of rapamycin on neuropathic pain were attributed to a reduction in mammalian target of rapamycin sensitive complex 1 (mTORC1)-positive cells (70.80 ± 2.41 vs. 112.30 ± 5.66, F = 34.36, P < 0.01) and mTORC1 activity in the mouse spinal cord. Mechanistic studies revealed that Protein Kinase B (Akt)/mTOR signaling pathway blockade with rapamycin prevented the phosphorylation of mTORC1 in stavudine-intoxicated mice (0.72 ± 0.04 vs. 0.86 ± 0.03, F = 4.24, P = 0.045), as well as decreased the expression of phospho-p70S6K (0.47 ± 0.01 vs. 0.68 ± 0.03, F = 6.01, P = 0.022) and phospho-4EBP1 (0.90 ± 0.04 vs. 0.94 ± 0.06, F = 0.28, P = 0.646).@*Conclusions@#Taken together, these results suggest that stavudine elevates the expression and activity of mTORC1 in the spinal cord through activating the Akt/mTOR signaling pathway. The data also provide evidence that rapamycin might be useful for the treatment of peripheral neuropathic pain.

Tenofovir associado a entricitabina (TDF/FTC 300/200mg) como profilaxia pré-exposição (PrEP) para populações sob maior risco de adquirir o vírus da imunodeficiência humana (HIV) / Tenofovir associated with emtricitabine (TDF / FTC 300 / 200mg) as pre-exposure prophylaxis (PrEP) for populations at increased risk of acquiring human immunodeficiency virus (HIV)

CONTEXTO: A resposta brasileira à epidemia de aids é resultante de um longo processo de atuação do governo brasileiro que garante desde 1996 acesso universal ao tratamento antirretroviral. Contudo, apesar dos inúmeros avanços ocorridos na redução da morbimortalidade nos últimos anos, o número de novos casos de aids vem se mantendo praticamente inalterado. No Brasil, a epidemia de aids é concentrada em determinados segmentos populacionais, que apresentam uma maior prevalência de infecção pelo HIV, quando comparados à população em geral, e respondem pela maioria de casos novos da infecção. Assim, para essas populações sob maior risco de infecção pelo HIV faz-se necessário a construção de estratégias de prevenção focalizadas como forma de impactar a epidemia. TECNOLOGIA: Profilaxia pré-exposição (PrEP) oral, na forma de tenofovir associado a entricitabina (TDF/FTC 300/200mg). Consiste no uso de antirretrovirais previamente à exposição de risco. INDICAÇÃO: Redução de risco em adquirir a infecção pelo HIV, entre pessoas sob risco aumentado. PERGUNTA: O uso de tenofovir associado a entricitabina (TDF/FTC 300/200mg) quando comparado ao uso de placebo reduz o risco de infecção pelo HIV entre pessoas sob alto risco? EVIDÊNCIAS CIENTÍFICAS: As evidências científicas disponíveis demostram que o uso de PrEP reduz o risco de infecção pelo HIV, comparado a placebo, com eficácia >70% (RR=0,30, 95% IC: 0,21-0,45, p= 0,001). Sua eficácia está diretamente relacionada à adesão ao medicamento. Os eventos adversos foram similares entre o grupo placebo e o que usou PrEP. Casos de resistência aos medicamentos foram encontrados entre aqueles que iniciaram PrEP durante a fase aguda da infecção, mas a incidência de resistência durante o uso de PrEP foi baixa. Não foi encontrada associação entre uso de PrEP e mudanças no comportamento sexual. O uso de PrEP demonstrou segurança e eficácia, para a redução de risco em adquirir a infecção pelo HIV, entre pessoas sob risco aumentado, quando comparado ao uso de placebo. RECOMENDAÇÃO DA CONITEC: A CONITEC recomendou a incorporação da associação de tenofovir e entricitabina (TDF/FTC 300/200mg) como profilaxia pré-exposição (PrEP) para populações sob risco aumentado de infecção pelo HIV no SUS, condicionada à aprovação do registro na ANVISA para essa indicação e à apresentação de um plano de acompanhamento anual das pessoas que receberão a profilaxia, de forma que sua incorporação possa ser reavaliada dentro de um prazo de tempo de, no máximo, 2 anos. CONSULTA PÚBLICA: Por meio da Consulta Pública nº 05 foram recebidas 147 contribuições distribuídas entre os formulários destinados a experiência e opinião e os para contribuições técnico-científicas. O nível de concordância com a recomendação inicial favorável à incorporação do medicamento como profilaxia pré-exposição (prep) para populações sob risco aumentado de adquirir o vírus da imunodeficiência humana (HIV) no SUS foi alto, abrangendo quase a totalidade das contribuições técnico-científica e 77% das contribuições de experiência e opinião. Entre as discordantes ou parcialmente concordantes não foram identificadas contribuições que trouxessem evidências científicas novas às já incluídas nesse parecer técnico-científico ou contestações às evidências científicas identificadas e que embasam a proposta de incorporação do medicamento com finalidade profilática. A maioria das experiências profissionais relatadas convergem com a proposta de incorporação elaborada nesse parecer. RECOMENDAÇÃO FINAL: Deliberou-se por unanimidade recomendar a incorporação da associação de tenofovir e entricitabina (TDF/FTC 300/200mg) como profilaxia pré-exposição (prep) para populações sob risco aumentado de adquirir o vírus da imunodeficiência humana (HIV) no SUS, condicionada à aprovação da inclusão da indicação para profilaxia pré-exposição ao HIV no registro do medicamento pela ANVISA e reavaliação do plano de acompanhamento anual das pessoas que receberão a profilaxia, em até 2 anos. DECISÃO: Incorporar o tenofovir associado a entricitabina (TDF/FTC 300/200mg) como profilaxia pré-exposição (PrEP) para populações sob maior risco de adquirir o vírus da imunodeficiência humana (HIV), no âmbito do Sistema Único de Saúde ­ SUS, dada pela Portaria nº 21, publicada no DOU nº 101, do dia 29 de maio de 2017, seção 1, pág. 73.(AU)

CYP2B6 516 G>T polymorphism and side effects of the central nervous system in HIV-positive individuals under Efavirenz treatment: Study of a sample from southern Brazil

ABSTRACT This study aimed to identify the 516 G>T polymorphism of the CYP2B6 gene and evaluate its influence on central nervous system (CNS) side effect development in HIV-positive individuals undergoing Efavirenz (EFV) treatment in a population from southern Brazil. Additionally, we performed a survey on the clinical and epidemiological characteristics of our sample. In addition to medical records evaluation, whole blood of 89 individuals was analyzed for viral load, T lymphocyte count (CD4+ and CD8+), and the polymorphism. Considering the side effects of the CNS reported by individuals but without considering the genetic variables, no statistically significant association was noted between the adverse effects and the antiretroviral treatment (including or not EFV). In addition, no statistically significant difference was noted for the influence of genotype on the viral load or the number of T lymphocytes (CD4+ and CD8+) among individuals undergoing EFV treatment. This is the first study that investigated the impact of the 516 G>T polymorphism of the CYP2B6 gene among HIV-positive individuals from southern Brazil. Its clinical significance indicates the need for prospective studies in this population.

Antirretroviral etravirina 200mg para o tratamento da infecção pelo HIV / Antiretroviral etravirine 200mg for the treatment of HIV infection

CONTEXTO: Atualmente, encontra-se disponível na RENAME somente a apresentação de 100mg por comprimido para tomada diária de 2 comprimidos. A apresentação etravirina 200 mg reduzirá o número de comprimidos ingeridos diariamente, em combinação com outros antirretrovirais que compõe seu regime terapêutico. A comodidade posológica contribui para adesão ao tratamento. TECNOLOGIA: etravirina (Intelence®). INDICAÇÃO: pacientes em falha virológica e que apresentem resistência viral a pelo menos um antirretroviral de cada uma das classes dos ITRNN, Inibidores da Transcriptase Reversa Análogos de Nucleosídeos (ITRN) e Inibidores de Protease (IP), detectada por exames de genotipagem realizado nos últimos 13 meses. RECOMENDAÇÃO DA CONITEC: A CONITEC deliberou, por unanimidade, recomendar a incorporação da apresentação de 200 mg da etravirina para o tratamento da infecção pelo HIV, na reunião do dia 02 de fevereiro de 2017. DECISÃO: Incorporar a apresentação de 200mg do antirretroviral etravirina para o tratamento da infecção pelo HIV, no âmbito do Sistema Único de Saúde - SUS. A decisão foi dada pela Portaria SCTIE-MS nº 12 publicada no Diário Oficial da União (DOU) nº 50, de 14 de março de 2017, pág. 53.(AU)

Antiangiogenic VEGF165b expression in human breast MCF-7 and MCF-10A cells exposed to reverse transcriptase and protease inhibitors / Expresión de VEGF165b antiangiogénico en células MCF-7 y MCF-10A de mama humana expuesto a inhibidores de la transcriptasa inversa y la proteasa

The combined antiretroviral therapy (cART), a multidrug combination regimen, usually consisting Nucleoside Reverse Transcriptase Inhibitors, non- Nucleoside Reverse Transcriptase Inhibitors and Protease Inhibitors has altered the morbidity pattern affecting HIV-infected individuals to include non-AIDS-defining malignancies (nADMs). The speculation is rife; does cART induce or promote the progression of nADMs such as breast cancer? This study was therefore designed to investigate of the effects of some antiretroviral drugs (at clinically relevant concentrations) on the expression of anti-angiogenic gene; VEGF165b in two human breast cell lines; MCF-7 and MCF-10A by Real Time qPCR and immuno-fluorescence. All of the antiretroviral drugs and combinations tested produced patterns of slight up or downregulation of VEGF165b mRNA expression but the alterations did not attain statistical significance. They also did not alter VEGF165bprotein localisation in both cell lines. The findings reported here suggest that antiretroviral drugs probably do not influence the angiogenic pathway in the development of breast cancer in patients under the combined antiretroviral regimen.

El tratamiento antirretroviral combinado (TARc), un régimen de combinación de múltiples fármacos, consistiendo generalmente en inhibidores nucleósidos de la transcriptasa reversa, inhibidores no-nucleósidos de la transcriptasa reversa e inhibodres de proteasa que alteran el patrón de mortalidad que afecta a infectados por el VIH incluyendo neoplasias definidas como no HIV (nADMs). La especulación es moneda corriente; TARc induce o promueve la progresión de nADMs como cáncer de mama? Por lo tanto, este estudio se diseñó para investigar los efectos de algunos de los fármacos antirretrovirales (en concentraciones clínicamente relevantes) sobre la expresión del gen anti-angiogénico; VEGF165b en dos líneas celulares de mama humana; MCF-7 y MCF-10A por PCR tiempo real e inmunofluorescencia. Todos los fármacos antirretrovirales y las combinaciones probadas pueden regular en forma ligera hacia arriba o hacia abajo la expresión de ARNm producidos por VEGF165b pero las alteraciones no fueron estadísticamente significativos. Además, no se alteran los niveles de proteína VEGF165b, para la localización en ambas líneas celulares. Los resultados aquí presentados sugieren que los medicamentos antirretrovirales probablemente no influyen en la vía angiogénica en el desarrollo del cáncer de mama en pacientes bajo el régimen antirretroviral combinado.

Antirretroviral etravirina 200mg para o tratamento da infecção pelo HIV / Antiretroviral etravirine 200mg for the treatment of HIV infection

Tecnologia: etravirina (Intelence®). Indicação: pacientes em falha virológica e que apresentem resistência viral a pelo menos um antirretroviral de cada uma das classes dos ITRNN, Inibidores da Transcriptase Reversa Análogos de Nucleosídeos (ITRN) e Inibidores de Protease (IP), detectada por exames de genotipagem realizado nos últimos 13 meses. Demandante: Secretaria de Vigilância em Saúde do Ministério da Saúde. Contexto: Atualmente, encontra-se disponível na RENAME somente a apresentação de 100mg por comprimido para tomada diária de 2 comprimidos.A apresentação etravirina 200 mg reduzirá o número de comprimidos ingeridos diariamente, em combinação com outros antirretrovirais que compõe seu regime terapêutico. A comodidade posológica contribui para adesão ao tratamento. Recomendação da CONITEC: A CONITEC deliberou, por unanimidade, recomendar a incorporação da apresentação de 200 mg da etravirina para o tratamento da infecção pelo HIV, na reunião do dia 02 de fevereiro de 2017. Decisão: Incorporar a apresentação de 200mg do antirretroviral etravirina para o tratamento da infecção pelo HIV, no âmbito do Sistema Único de Saúde - SUS. A decisão foi dada pela Portaria SCTIE -MS nº 12 publicada no Diário Oficial da União (DOU) nº 50, de 14 de março de 2017.

Regional Experience of Abacavir: Valuable but Still has Unanswered Question

No abstract available.

Extensive variation in drug-resistance mutational profile of Brazilian patients failing antiretroviral therapy in five large Brazilian cities

Abstract Background Development of drug-resistance mutations is the main cause of failure in antiretroviral therapy. In Brazil, there is scarce information on resistance pattern for patients failing antiretroviral therapy. Objectives To define the HIV mutational profile associated with drug resistance in Brazilian patients from 5 large cities, after first, second or further failures to antiretroviral therapy. Methods We reviewed genotyping results of 1520 patients failing therapy in five Brazilian cities. Frequency of mutations, mean number of active drugs, viral susceptibility to each antiretrovirals drug, and regional differences were assessed. Results Mean time of antiretrovirals use was 22.7 ± 41.1 months. Mean pre-genotyping viral load was 4.2 ± 0.8 log (2.1 ± 2.0 after switching antiretrovirals). Mean number of remaining active drugs was 9.4, 9.0, and 7.9 after 1st, 2nd, and 3rd failure, respectively. We detected regional variations in drug susceptibility: while BA and RS showed the highest (∼40%) resistance level to ATV/r, FPV/r and LPV/r, in the remaining cities it was around half of this rate. We detected 90% efavirenz/nevirapine resistance in SP, only 45% in RS, and levels between 25% and 30% in the other cities. Regarding NRTI, we found a similar pattern, with RJ presenting the highest, and CE the lowest susceptibility rates for all NRTI. Zidovudine resistance was detected in only 3% of patients in RJ, against 45–65% in the other cities. RJ and RS showed 3% resistance to tenofovir, while in CE it reached 55%. DRV/r (89–97%) and etravirine (61–85%) were the most active drugs, but again, with a wide variation across cities. Conclusions The resistance mutational profile of Brazilian patients failing antiretroviral therapy is quite variable, depending on the city where patients were tested. This variation likely reflects distinctive choice of antiretrovirals drugs to initiate therapy, adherence to specific drugs, or circulating HIV-1 strains. Overall, etravirine and DRV/r remain as the most active drugs.

Efficacy and Safety of Elvitegravir/Cobicistat/Emtricitabine/Tenofovir Disoproxil Fumarate in Asian Subjects with Human Immunodeficiency Virus 1 Infection: A Sub-Analysis of Phase 3 Clinical Trials

The efficacy and safety of a single tablet regimen (STR) of elvitegravir/cobicistat/emtricitabine/tenofovir disoproxil fumarate (E/C/F/TDF) were analyzed in Phase 3 clinical trials in antiretroviral therapy (ART)-naïve and ART-experienced Asian subjects infected with human immunodeficiency virus (HIV)-1. Studies GS-US-236-102 and GS-US-236-103 were randomized, double-blind, placebo-controlled, 144-week studies conducted in ART-naïve subjects, comparing E/C/F/TDF versus efavirenz (EFV)/F/TDF or ritonavir-boosted atazanavir (ATV+RTV) plus emtricitabine/tenofovir DF (F/TDF), respectively. Studies GS-US-236-115 and GS-US-236-121 were randomized, open-label, 96-week long conducted in ART-experienced subjects, who switched to E/C/F/TDF from ritonavir-boosted protease inhibitors (PI+RTV)+F/TDF, or non-nucleoside reverse transcriptase inhibitors (NNRTI)+F/TDF regimens. The E/C/F/TDF appeared to have sustained efficacy and safety and was well tolerated in the small number of ART-naïve and ART-experienced Asian subjects.

Computational drug design strategies applied to the modelling of human immunodeficiency virus-1 reverse transcriptase inhibitors

Reverse transcriptase (RT) is a multifunctional enzyme in the human immunodeficiency virus (HIV)-1 life cycle and represents a primary target for drug discovery efforts against HIV-1 infection. Two classes of RT inhibitors, the nucleoside RT inhibitors (NRTIs) and the nonnucleoside transcriptase inhibitors are prominently used in the highly active antiretroviral therapy in combination with other anti-HIV drugs. However, the rapid emergence of drug-resistant viral strains has limited the successful rate of the anti-HIV agents. Computational methods are a significant part of the drug design process and indispensable to study drug resistance. In this review, recent advances in computer-aided drug design for the rational design of new compounds against HIV-1 RT using methods such as molecular docking, molecular dynamics, free energy calculations, quantitative structure-activity relationships, pharmacophore modelling and absorption, distribution, metabolism, excretion and toxicity prediction are discussed. Successful applications of these methodologies are also highlighted.

Impacto del tratamiento antirretroviral en la función sexual de mujeres con VIH / Impact of antiretroviral treatment on sexual function of HIV-infected women

Objetivo. Describir la función sexual de un grupo de mujeres con VIH bajo tratamiento antirretroviral. Evaluar si existe diferencia entre las tratadas con un esquema que contiene Inhibidores No Nucleósidos de la Transcriptasa Inversa (INNTI) y aquéllas que reciben Inhibidores de la Proteasa (IP). Material y métodos. Estudio descriptivo, transversal. Muestra: 92 pacientes mujeres con VIH bajo tratamiento antirretroviral, que son asistidas en el Instituto Centralizado de Asistencia e Investigación Clínica Integral (CAICI). Instrumento: Se les realizó una encuesta que consta de características demográficas, preguntas referidas al VIH y al The Female Sexual Function Index (FSFI). Análisis estadístico: se utilizó ANOVA, Kruskall-Wallis, Chi cuadrado, regresión logística y alpha de Cronbach. Resultados. Edad media: 42±10 años; 65% tenían pareja estable, siendo el 73% de estas sero-discordantes. La mayoría (45,7%) estaban en tratamiento antirretroviral por más de dos años, con una media de CD4 mayor a 500 cél/ml y el 90% con carga viral plasmática indetectable. El 64,1% presentaba otra enfermedad asociada, por lo que el 55,4% tomaba medicación concomitante. El 27,2% continuó con su actividad sexual luego del diagnóstico de VIH, pero el 26,1% nunca la retomó. La puntuación total alcanzada por medio del FSFI fue de 20,4±10,1 para las tratadas con IP y 20±10,6 para las tratadas con INNTI (p <0,005). Conclusiones. La muestra analizada presentó un puntaje compatible con disfunción sexual. No hubo diferencia estadísticamente significativa en la función sexual de las mujeres tratadas con IP y las tratadas con INNTI

Summary Objective: To describe the sexual function in a group of women with HIV on antiretroviral treatment. To assess whether there is a difference between those treated with Non-nucleoside Inhibitors of he Reverse Transcriptase (NNRTI) and those receiving protease inhibitors (PIs). Material and methods: Descriptive, transversal study. Study sample: 92 women with HIV on antiretroviral therapy who are assisted in the Central Institute of Integral Assistance and Clinical Research (CAICI). Instrument: They completed a survey consisting of questions about demographic characteristics, HIV, and The Female Sexual Function Index (FSFI). Statistical analysis: ANOVA, Kruskal-Wallis, Chi-square, logistic regression and Cronbach’s alpha. Results: Average age was 42±10 years; 65% had a steady partner, of which 73% were sero-discordant. Most patients (45.7%) had been on antiretroviral treatment for more than two years, with a mean CD4 greater than 500 cells/ml and 90% with undetectable plasma viral load. Other illnesses were present in 64.1%, and 55.4% were taking concomitant medication. Sexual activity after HIV diagnosis was continued by 27.2%, while 26.1% never resumed it. The total score achieved by the FSFI was 20.4±10.1 among those treated with IP and 20.0±10.6 among those treated with NNRTI(p<0.005). Conclusions: The score in the present sample supports the existence of sexual dysfunction. There was no statistically significant difference in the sexual function of women treated with either PI or NNRTI

Association between antiretrovirals and thyroid diseases: a cross-sectional study

Objective This study aims to estimate the prevalence of thyroid diseases and anti-TPO status. We searched for an association among presence of immune reconstitution and use of stavudine, didanosine and protease inhibitors with thyroid diseases. Materials and methods A cross-sectional study was performed to analyze the records of 117 HIV-infected patients who had their CD4+ cell count, viral load, anti-TPO, TSH and free T4 levels collected on the same day. Immune reconstitution was considered in those whose T CD4+ count was below 200 cells/mm3, but these values increased above 200 cells/mm3 after the use of antiretrovirals. The odds ratio obtained by a 2x2 contingency table and a chi-square test were used to measure the association between categorical variables. Results The prevalence of thyroid disease was 34.18%; of these, 4.34% were positive for anti-TPO. There was an association of risk between stavudine use and subclinical hypothyroidism (OR = 4.19, 95% CI: 1.29 to 13.59, X2 = 6.37, p = 0.01). Immune reconstitution achieved protection associated with thyroid disease that was near statistical significance OR = 0.45, 95% CI: 0.19 to 1.04, X2 = 3.55, p = 0.059. Conclusion The prevalence of thyroid disease in the sample studied was higher than what had been found in the literature, with a low positive anti-TPO frequency. The historical use of stavudine has an association of risk for the presence of subclinical hypothyroidism, and immune reconstitution has trends towards protection for the presence of thyroid diseases. .