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1.
medRxiv ; 2024 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-38496497

RESUMO

Background: The primary barrier to curing HIV infection is the pool of intact HIV proviruses integrated into host cell DNA throughout the bodies of people living with HIV (PLHIV), called the HIV reservoir. Reservoir size is impacted by the duration of HIV infection, delay in starting antiretroviral therapy (ART), and breakthrough viremia during ART. The leading infectious cause of death worldwide for PLHIV is TB, but we don't know how TB impacts the HIV reservoir. Methods: We designed a case-control study to compare HIV provirus-containing CD4 in PLHIV with vs. without a history of active TB disease. Study participants in the pilot and confirmatory cohort were enrolled at GHESKIO Centers in Port au Prince, Haiti. Intact and non-intact proviral DNA were quantified using droplet digital PCR of PBMC-derived CD4 cells. For a subset, Th1 and Th2 cytokines were assayed in plasma. Kruskal-Wallis tests were used to compare medians with tobit regression for censoring. Results: In the pilot cohort, we found that PLHIV with history of active pulmonary TB (n=20) had higher intact provirus than PLHIV without history of active TB (n=47) (794 vs 117 copies per million CD4, respectively; p<0.0001). In the confirmatory cohort, the quantity of intact provirus was higher in the TB group (n=13) compared with the non-TB group (n=18) (median 102 vs. 0 intact provirus per million CD4, respectively p=0.03). Additionally, we found that the frequencies of CD4+ T cells with any detectable proviral fragment was directly proportional to the levels of IL1B (p= 0.0025) and IL2 (p=0.0002). Conclusions: This is the first assessment of HIV provirus using IPDA in a clinical cohort from a resource limited setting, and the finding of larger reservoir in PLHIV with history of TB has significant implications for our understanding of TB-HIV coinfection and HIV cure efforts in TB-endemic settings.

2.
J. bras. nefrol ; 45(1): 121-125, Jan.-Mar. 2023. graf
Artigo em Inglês | LILACS-Express | LILACS | ID: biblio-1430645

RESUMO

Abstract Wunderlich syndrome, or spontaneous renal hemorrhage (SRH), is a rare condition encountered in patients undergoing chronic hemodialysis (HD) usually attributed to acquired cystic kidney disease (ACKD) among other causes. In the literature, colonoscopy is associated with splenic injuries, and renal hemorrhage has not been previously described. Management can range from conservative treatment to angiographic embolization or exploration and nephrectomy. Here we report an unusual case of a 54-year-old woman HD patient who presented with SRH within a few days of colonoscopy. The reason of SRH was rupture of an ACKD cyst. We assumed that colonoscopy was a provoking factor and elaborated hypotheses for its etiopathogenesis. The patient underwent successful left nephrectomy. The importance of this case lies in the fact that colonoscopy is not always an innocent procedure in HD patients, and could be complicated by renal cyst hemorrhage.


Resumo A síndrome de Wunderlich, ou hematoma perirrenal espontâneo (HPE), é uma condição rara encontrada em pacientes submetidos à hemodiálise crônica (HD) geralmente atribuída à doença renal cística adquirida (DRCA), entre outras causas. Na literatura, a colonoscopia está associada a lesões esplênicas, e o hematoma renal não foi descrito anteriormente. O manejo pode variar de tratamento conservador a embolização angiográfica ou exploração e nefrectomia. Aqui relatamos um caso incomum de uma paciente em HD de 54 anos de idade que se apresentou com HPE dentro de poucos dias após a colonoscopia. O motivo do HPE foi a ruptura de um cisto de DRCA. Consideramos que a colonoscopia foi um fator provocador e elaboramos hipóteses para sua etiopatogenia. A paciente foi submetida a uma nefrectomia esquerda bem-sucedida. A importância deste caso reside no fato de que a colonoscopia nem sempre é um procedimento inocente em pacientes em HD, e pode ser complicada por hemorragia do cisto renal.

3.
J Bras Nefrol ; 45(1): 121-125, 2023.
Artigo em Inglês, Português | MEDLINE | ID: mdl-34516606

RESUMO

Wunderlich syndrome, or spontaneous renal hemorrhage (SRH), is a rare condition encountered in patients undergoing chronic hemodialysis (HD) usually attributed to acquired cystic kidney disease (ACKD) among other causes. In the literature, colonoscopy is associated with splenic injuries, and renal hemorrhage has not been previously described. Management can range from conservative treatment to angiographic embolization or exploration and nephrectomy. Here we report an unusual case of a 54-year-old woman HD patient who presented with SRH within a few days of colonoscopy. The reason of SRH was rupture of an ACKD cyst. We assumed that colonoscopy was a provoking factor and elaborated hypotheses for its etiopathogenesis. The patient underwent successful left nephrectomy. The importance of this case lies in the fact that colonoscopy is not always an innocent procedure in HD patients, and could be complicated by renal cyst hemorrhage.


Assuntos
Neoplasias Renais , Feminino , Humanos , Pessoa de Meia-Idade , Espaço Retroperitoneal , Síndrome , Hemorragia/etiologia , Diálise Renal/efeitos adversos
4.
J Int AIDS Soc ; 24(7): e25721, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34235862

RESUMO

INTRODUCTION: Long-term mortality among TB survivors appears to be higher than control populations without TB in many settings. However, data are limited among persons with HIV (PWH). We assessed the association between cured TB and long-term mortality among persons with PWH in Haiti. METHODS: A prospective cohort of PWH from the CIPRA HT-001 trial was followed from study enrolment (August 2005 to July 2008) to study closure (December 2018) to compare mortality between participants with and without TB. The index date for the survival analysis was defined as 240 days after TB diagnosis or randomization date. Time to death was described using Kaplan-Meier curves, and log-rank tests were used to compare time to death between the TB and no-TB cohorts. The association between TB and long-term mortality was estimated with multivariable Cox models. RESULTS: Of the 816 participants in the CIPRA HT-001 trial, 77 were excluded for a history of TB prior to study enrolment and 31 were excluded due to death or attrition prior to the index date, leaving 574 in the no-TB and 134 in the TB cohort. Twenty-four (17.9%) participants in the TB and 48 (8.4%) in the no-TB cohort died during follow-up. Five and 10-year mortality rates were 14.2% and 17.9% respectively, in the TB cohort, and 6.1% and 8.4% in the no-TB cohort. In Kaplan-Meier analysis, participants in the TB cohort had a significantly shorter time to death (log-rank p < 0.001). In multivariable analysis, TB treatment was the only predictor of mortality (HR: 2.78; 95% CI: 1.61, 4.79). Sensitivity analyses, which included only baseline TB cases, an index date of two years after TB diagnosis, and study enrolment and case-control matching yielded results that were consistent with primary analyses. CONCLUSIONS: PWH who are successfully treated for TB have higher long-term mortality than those who are never diagnosed with TB, even after accounting for acute TB-related mortality. A better understanding of the underlying mechanisms associated with TB sequelae is critically needed to guide specific interventions. Until then, more aggressive measures for health promotion and disease prevention are essential to improve long-term survival for PWH after TB treatment.


Assuntos
Infecções por HIV , Tuberculose , Estudos de Coortes , Infecções por HIV/complicações , Infecções por HIV/tratamento farmacológico , Haiti , Humanos , Estudos Prospectivos , Tuberculose/tratamento farmacológico
5.
J Neurol Neurosurg Psychiatry ; 91(1): 49-57, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31690697

RESUMO

OBJECTIVE: Sensory neuropathies (SNs) are often classified as idiopathic even if immunological mechanisms can be suspected. Antibodies against the intracellular domain of the fibroblast growth factor receptor 3 (FGFR3) possibly identify a subgroup of SN affecting mostly the dorsal root ganglion (DRG). The aim of this study was to identify the frequency of anti-FGFR3 antibodies and the associated clinical pattern in a large cohort of patients with SN. METHODS: A prospective, multicentric, European and Brazilian study included adults with pure SN. Serum anti-FGRF3 antibodies were analysed by ELISA. Detailed clinical and paraclinical data were collected for each anti-FGFR3-positive patient and as control for anti-FGFR3-negative patients from the same centres ('center-matched'). RESULTS: Sixty-five patients out of 426 (15%) had anti-FGFR3 antibodies, which were the only identified autoimmune markers in 43 patients (66%). The neuropathy was non-length dependent in 89% and classified as sensory neuronopathy in 64%, non-length-dependent small fibre neuropathy in 17% and other neuropathy in 19%. Specific clinical features occurred after 5-6 years of evolution including frequent paresthesia, predominant clinical and electrophysiological involvement of the lower limbs, and a less frequent mixed large and small fibre involvement. Brazilians had a higher frequency of anti-FGFR3 antibodies than Europeans (36% vs 13%, p<0.001), and a more frequent asymmetrical distribution of symptoms (OR 169, 95% CI 3.4 to 8424). CONCLUSIONS: Anti-FGFR3 antibodies occur in a subgroup of SN probably predominantly affecting the DRG. Differences between Europeans and Brazilians could suggest involvement of genetic or environmental factors.


Assuntos
Autoanticorpos/imunologia , Neuropatia Hereditária Motora e Sensorial/imunologia , Receptor Tipo 3 de Fator de Crescimento de Fibroblastos/imunologia , Adulto , Autoanticorpos/análise , Brasil , Estudos de Coortes , Eletrodiagnóstico , Europa (Continente) , Feminino , Neuropatia Hereditária Motora e Sensorial/fisiopatologia , Humanos , Masculino , Pessoa de Meia-Idade , Fibras Nervosas/patologia , Estudos Prospectivos
6.
Sci Rep ; 7(1): 10767, 2017 09 07.
Artigo em Inglês | MEDLINE | ID: mdl-28883399

RESUMO

Mycobacterium tuberculosis, the cause of Tuberculosis (TB), infects one third of the world's population and causes substantial mortality worldwide. In its shortest format, treatment of TB requires six months of multidrug therapy with a mixture of broad spectrum and mycobacterial specific antibiotics, and treatment of multidrug resistant TB is longer. The widespread use of this regimen makes this one of the largest exposures of humans to antimicrobials, yet the effects of TB treatment on intestinal microbiome composition and long-term stability are unknown. We compared the microbiome composition, assessed by both 16S rDNA and metagenomic DNA sequencing, of TB cases during antimycobacterial treatment and following cure by 6 months of antibiotics. TB treatment does not perturb overall diversity, but nonetheless dramatically depletes multiple immunologically significant commensal bacteria. The microbiomic perturbation of TB therapy can persist for at least 1.2 years, indicating that the effects of TB treatment are long lasting. These results demonstrate that TB treatment has dramatic effects on the intestinal microbiome and highlight unexpected durable consequences of treatment for the world's most common infection on human ecology.


Assuntos
Antituberculosos/efeitos adversos , Disbiose/etiologia , Microbioma Gastrointestinal/efeitos dos fármacos , Tuberculose Pulmonar/tratamento farmacológico , Adolescente , Adulto , Antituberculosos/uso terapêutico , Estudos Transversais , Quimioterapia Combinada , Feminino , Microbioma Gastrointestinal/genética , Haiti , Humanos , Masculino , Pessoa de Meia-Idade , Mycobacterium tuberculosis/efeitos dos fármacos
7.
Am J Trop Med Hyg ; 89(4): 671-681, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24106194

RESUMO

Successful and sustained efforts have been made to curtail the major cholera epidemic that occurred in Haiti in 2010 with the promotion of hygiene and sanitation measures, training of health personnel and establishment of treatment centers nationwide. Oral cholera vaccine (OCV) was introduced by the Haitian Ministry of Health as a pilot project in urban and rural areas. This paper reports the successful OCV pilot project led by GHESKIO Centers in the urban slums of Port-au-Prince where 52,357 persons received dose 1 and 90.8% received dose 2; estimated coverage of the at-risk community was 75%. This pilot study demonstrated the effort, community mobilization, and organizational capacity necessary to achieve these results in a challenging setting. The OCV intervention paved the way for the recent launching of a national cholera vaccination program integrated in a long-term ambitious and comprehensive plan to address Haiti's critical need in water security and sanitation.


Assuntos
Vacinas contra Cólera/imunologia , Cólera/prevenção & controle , Vacinação , Administração Oral , Adolescente , Criança , Pré-Escolar , Cólera/epidemiologia , Vacinas contra Cólera/administração & dosagem , Diarreia/epidemiologia , Feminino , Haiti/epidemiologia , Humanos , Lactente , Masculino , Fatores de Tempo , População Urbana
8.
N Engl J Med ; 363(3): 257-65, 2010 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-20647201

RESUMO

BACKGROUND: For adults with human immunodeficiency virus (HIV) infection who have CD4+ T-cell counts that are greater than 200 and less than 350 per cubic millimeter and who live in areas with limited resources, the optimal time to initiate antiretroviral therapy remains uncertain. METHODS: We conducted a randomized, open-label trial of early initiation of antiretroviral therapy, as compared with the standard timing for initiation of therapy, among HIV-infected adults in Haiti who had a confirmed CD4+ T-cell count that was greater than 200 and less than 350 per cubic millimeter at baseline and no history of an acquired immunodeficiency syndrome (AIDS) illness. The primary study end point was survival. The early-treatment group began taking zidovudine, lamivudine, and efavirenz therapy within 2 weeks after enrollment. The standard-treatment group started the same regimen of antiretroviral therapy when their CD4+ T-cell count fell to 200 per cubic millimeter or less or when clinical AIDS developed. Participants in both groups underwent monthly follow-up assessments and received isoniazid and trimethoprim-sulfamethoxazole prophylaxis with nutritional support. RESULTS: Between 2005 and 2008, a total of 816 participants--408 per group--were enrolled and were followed for a median of 21 months. The CD4+ T-cell count at enrollment was approximately 280 per cubic millimeter in both groups. There were 23 deaths in the standard-treatment group, as compared with 6 in the early-treatment group (hazard ratio with standard treatment, 4.0; 95% confidence interval [CI], 1.6 to 9.8; P=0.001). There were 36 incident cases of tuberculosis in the standard-treatment group, as compared with 18 in the early-treatment group (hazard ratio, 2.0; 95% CI, 1.2 to 3.6; P=0.01). CONCLUSIONS: Early initiation of antiretroviral therapy decreased the rates of death and incident tuberculosis. Access to antiretroviral therapy should be expanded to include all HIV-infected adults who have CD4+ T-cell counts of less than 350 per cubic millimeter, including those who live in areas with limited resources. (ClinicalTrials.gov number, NCT00120510.)


Assuntos
Antirretrovirais/administração & dosagem , Infecções por HIV/tratamento farmacológico , Infecções Oportunistas Relacionadas com a AIDS/tratamento farmacológico , Adulto , Antirretrovirais/efeitos adversos , Antituberculosos/uso terapêutico , Contagem de Linfócito CD4 , Esquema de Medicação , Feminino , Seguimentos , Infecções por HIV/mortalidade , Haiti , Humanos , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Tuberculose Pulmonar/tratamento farmacológico , Tuberculose Pulmonar/epidemiologia , Tuberculose Pulmonar/prevenção & controle
9.
Acta bioeth ; 10(2): 131-141, 2004.
Artigo em Espanhol | LILACS | ID: lil-401574

RESUMO

La idea de la ciudad utópica es casi tan antigua como el pensamiento humano. Ella consiste en una sociedadteóricamente perfecta y transparente donde todo está perfectamente controlado y, en consecuencia, los ciudadanos podrán alcanzar la felicidad. En este artículo pretendemos reflexionar, mediante una perspectiva holística y con ejemplos prácticos como la clonación,células troncales y eugenismo, acerca de la sociedad genética actualmente en ciernes, la que, a pesar de presentarse como una potente herramienta para alcanzar una ciudad utópica, sería hoy imposible por los numerosos riesgos y peligros existentes. Por tanto, creemos importante un análisis sobre la bioética y el progreso, antes de seguir adelante.


Assuntos
Humanos , Masculino , Feminino , Bioética , Clonagem de Organismos/ética , Eugenia (Ciência) , Genética/ética , Células-Tronco
10.
Food Nutr Bull ; 23(3 Suppl): 195-8, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12362794

RESUMO

We compared the absorption of BioZn, SFE-171, SO4Fe (reference standard) and SO4Zn (reference standard) alone or in combination in water and in an infant dessert. When mineral interactions were evaluated, zinc and iron were administered in a 1:1 molar relation. There 160 rats divided in 16 groups of 10 animals each which received: SO(4)65Zn, Bio65Zn, SO(4)65Zn + SO4Fe, Bio65Zn + SFE-171, SO(4)59Fe, 59SFE-171, SO(4)59Fe + SO4Zn and 59SFE-171 + BioZn either in water or an infant dessert. The results showed that BioZn has bioavailability similar to SO4Zn both in water (23.36 +/- 3.14% vs. 21.48 +/- 6.03%. respectively) and in an infant dessert (19.89 +/- 3.27% vs. 18.31 +/- 4.76%, respectively). When these zinc compounds were administered with iron no statistical difference of zinc absorption was found (Bio65Zn + SFE-171 in water 22.70 +/- 6.30%, Bio65Zn + SFE-171 in the infant dessert 18.07 +/- 5.89%, SO(4)65Zn + SO4Fe in water 24.67 +/- 5.70% and SO(4)65Zn + SO4Fe in the infant desert 20.56 +/- 5.20%). For iron, the absorption of 59SFE-171 in water was higher (p < .01) than SO(4)59Fe in water and 59SFE-171 + BioZn in water (32.35 +/- 8.32% vs. 26.27 +/- 8.83% vs. 23.69 +/- 8.37%, respectively). Iron absorption from SO(4)59Fe in water was higher (p < .01) than SO(4)59Fe + SO4Zn in water (26.27 +/- 8.83% vs. 20.21 +/- 8.72%, respectively). Iron absorption in the infant dessert was higher (p < .01) for 59SFE-171 + BioZn than SO(4)59Fe, 59SFE-171 and SO(4)59Fe + SO4Zn (22.81 +/- 6.97% vs. 16.12 +/- 6.14% vs. 16.90 +/- 6.23% vs. 15.04 +/- 6.25%, respectively). Statistical differences (p < .01) were found between iron absorption from 59SFE-171 in water and the infant dessert (32.35 +/- 8.32% vs. 16.90 +/- 6.23%, respectively) and for SO(4)59Fe (26.27 +/- 8.83% vs. 16.12 +/- 6.14% respectively). Zinc and iron interactions evaluated in a 1:1 molar relation of the minerals were observed only for iron absorption in water but not in infant dessert. No negative effect was found for zinc absorption neither in water nor in infant dessert.


Assuntos
Absorção Intestinal/efeitos dos fármacos , Ferro/farmacocinética , Zinco/farmacocinética , Animais , Interações Medicamentosas , Feminino , Análise de Alimentos , Ferro/administração & dosagem , Ferro/farmacologia , Valor Nutritivo , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Zinco/administração & dosagem , Zinco/farmacologia
11.
Bol. Cient. Asoc. Chil. Segur ; 2(4): 75-75, dic. 2000.
Artigo em Espanhol | LILACS | ID: lil-318133

RESUMO

El artículo propone una reflexión acerca de la dificultad común de entender el concepto de autonomía del paciente como valor "prima facie". Se le da énfasis al status y la voluntad del paciente competente y no al deontologismo kantiano que influye a menudo al médico y a sus tendencias paternalistas, vale decir, a restringir la libertad del paciente con el objeto de beneficiarle. Las principales dificultades que surgen en el reconocimiento del paternalismo médico como enfoque "negativizante" en la relación médico-paciente son: la falta de competencia del paciente, la baja educación del médico y el rechazo de su autonomía por parte del propio paciente


Assuntos
Humanos , Paternalismo , Relações Médico-Paciente , Autonomia Pessoal
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