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1.
Immunohorizons ; 4(2): 47-56, 2020 02 07.
Artículo en Inglés | MEDLINE | ID: mdl-32034084

RESUMEN

Erythema nodosum leprosum (ENL) is an inflammatory complication in leprosy. Yet, the involvement of ENL neutrophils in the inflammatory response against Mycobacterium leprae remains poorly explored. Our primary aim was to investigate the utility of the surface expression of neutrophil IL-10R1 as an ENL biomarker and, secondarily, to evaluate whether leprosy or healthy M. leprae-stimulated neutrophils produce cytokines and are able to respond to IL-10. We, in this study, describe a subpopulation of circulating neutrophils of ENL patients that exclusively expressed IL-10R1, providing evidence that IL-10R1+ neutrophils are present in ENL lesions. It was also found that ENL neutrophils, but not those of nonreactional leprosy controls, were able to secret detectable levels of TNF ex vivo and the addition of IL-10 blocked TNF release. It was likewise observed that M. leprae-stimulated, healthy neutrophils expressed IL-10R1 in vitro, and ENL-linked cytokines were released by M. leprae-cultured neutrophils in vitro. Moreover, consistent with the presence of a fully functional IL-10R, the addition of IL-10 prevented the release of M. leprae-induced cytokines. Most importantly, dead M. leprae revealed its superior capacity to induce CCL4 and IL-8 in primary neutrophils over live Mycobacterium, suggesting that M. leprae may hamper the inflammatory machinery as an immune escape mechanism.

2.
Mem Inst Oswaldo Cruz ; 114: e190056, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31389520

RESUMEN

BACKGROUND: Fibrosis in the peripheral nerve is the end stage of leprous neuropathy and the cause of the resulting permanent neural function impairments. Preventive measures to avoid this irreversible pathological state are a relief strategy for leprosy sufferers. OBJECTIVES: The present study describes the frequency of fibrosis along with its characterisation and pathogenic development. METHODS: Six-hundred-and-thirteen nerve samples were sorted from 278 neural leprosy (NL) and 335 non-leprosy neuropathy patients (ON). The total number of samples was histologically examined by routine staining methods (haematoxylin-eosin, Wade staining and Gomori's trichrome) and fibrosis was evaluated via semi-quantitative estimation. FINDINGS: Fibrosis was most frequent in the NL group (33% against 0.4% in ON) while fibrosis in association with endoneurial microfasciculation was found in 38 (41.3%) of the NL samples in the examination of semithin sections. Pericytic activation in the perivascular environment was confirmed to be the source of the fibroblasts and perineurial cells delimiting microfascicles. End-stage fibrosis in leprosy displays an arrangement of microfascicles devoid of neural components (i.e., Schwann cells and axons) lined by an intermediate phenotype of fibroblastic-perineurial cells filled with bundles of collagen fibres. MAIN CONCLUSIONS: The present study underscores that fibrosis is frequently the severe end stage of neural leprosy NL pathogeny after analysing the notably distinct development of fibrosis within the neural environment.


Asunto(s)
Fibrosis/patología , Lepra Tuberculoide/patología , Nervios Periféricos/patología , Biopsia , Humanos , Inmunohistoquímica , Enfermedades del Sistema Nervioso Periférico/patología , Células de Schwann/patología
3.
Mem. Inst. Oswaldo Cruz ; 114: e190056, 2019. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1012667

RESUMEN

BACKGROUND Fibrosis in the peripheral nerve is the end stage of leprous neuropathy and the cause of the resulting permanent neural function impairments. Preventive measures to avoid this irreversible pathological state are a relief strategy for leprosy sufferers. OBJECTIVES The present study describes the frequency of fibrosis along with its characterisation and pathogenic development. METHODS Six-hundred-and-thirteen nerve samples were sorted from 278 neural leprosy (NL) and 335 non-leprosy neuropathy patients (ON). The total number of samples was histologically examined by routine staining methods (haematoxylin-eosin, Wade staining and Gomori's trichrome) and fibrosis was evaluated via semi-quantitative estimation. FINDINGS Fibrosis was most frequent in the NL group (33% against 0.4% in ON) while fibrosis in association with endoneurial microfasciculation was found in 38 (41.3%) of the NL samples in the examination of semithin sections. Pericytic activation in the perivascular environment was confirmed to be the source of the fibroblasts and perineurial cells delimiting microfascicles. End-stage fibrosis in leprosy displays an arrangement of microfascicles devoid of neural components (i.e., Schwann cells and axons) lined by an intermediate phenotype of fibroblastic-perineurial cells filled with bundles of collagen fibres. MAIN CONCLUSIONS The present study underscores that fibrosis is frequently the severe end stage of neural leprosy NL pathogeny after analysing the notably distinct development of fibrosis within the neural environment.


Asunto(s)
Humanos , Fibrosis/diagnóstico , Fibrosis/terapia , Lepra Tuberculoide/diagnóstico , Lepra Tuberculoide/prevención & control
4.
An Bras Dermatol ; 93(1): 145-147, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29641721

RESUMEN

Leprosy is a chronic infectious disease caused by Mycobacterium leprae, which affects peripheral nerves, skin and mucous membranes. The impairment of neural function as well as sensory or sensory-motor disabilities in leprosy continue to be a problem that requires careful attention in the management of patients with the aim to avoid or minimize their progression to prevent sequelae. One of the most common characteristics of these ulcers is the tendency to chronicity, with variable therapeutic response. In this article, we shall discuss the therapeutic management of thirteen trophic leprosy ulcers in eight patients using polyhexanide 0.2% products.


Asunto(s)
Biguanidas/uso terapéutico , Desinfectantes/uso terapéutico , Úlcera del Pie/tratamiento farmacológico , Úlcera del Pie/complicaciones , Humanos , Lepra/complicaciones , Datos Preliminares , Resultado del Tratamiento
5.
Am J Trop Med Hyg ; 98(6): 1609-1613, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29611495

RESUMEN

Neural pain is a frequent symptom in leprosy disease. There is a paucity of data regarding neural pain diagnostics resulting in common prescriptive errors when neuritis is confused with neuropathic or mixed nociceptive-neuropathic pain. The present study identified important demographic, clinical, and neurophysiological features of 42 leprosy neuropathy patients presenting neuropathic pain (NP). During routine evaluations, patients were selected asking if they had ever experienced neural pain. Data analyses of their pain characteristics, clinical examination results, and both the Douleur Neuropathique 4 Questionnaire and Hamilton Depression Scale scores were used to classify these patients. The most common word they used to describe the sensation of pain for 25 (60%) of these patients was "burning." In the early stages of the disease and before leprosy diagnosis, 19 (45%) had already complained about NP and leprosy treatment was unable to prevent its occurrence in 15 (36%). Leprosy reactions, considered NP risk factors, occurred in 32 (76%) cases. Knowledge of typical NP characteristics could be used to develop more effective therapeutic approaches for a notoriously difficult-to-treat pain condition.


Asunto(s)
Lepra/complicaciones , Neuralgia/fisiopatología , Adulto , Anciano , Femenino , Humanos , Lepra/epidemiología , Lepra/fisiopatología , Lepra Multibacilar/complicaciones , Lepra Multibacilar/epidemiología , Lepra Multibacilar/fisiopatología , Masculino , Persona de Mediana Edad , Trastornos Motores/epidemiología , Trastornos Motores/etiología , Conducción Nerviosa/fisiología , Neuralgia/epidemiología , Neuralgia/etiología , Dolor , Dimensión del Dolor , Trastornos de la Sensación/epidemiología , Trastornos de la Sensación/etiología , Adulto Joven
6.
Trials ; 19(1): 244, 2018 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-29685164

RESUMEN

BACKGROUND: The annual new-case detection rate for leprosy, while generally stable over the last decade, shows that transmission rates have remained stagnant despite the successful worldwide administration of multidrug therapy since the 1980s. As such, novel control strategies are urgently needed. Focusing on managing leprosy patient contacts, the most susceptible to contracting the disease, has been seen as a potential strategy in limiting the spread of leprosy as shown by a number of recent epidemiological studies. Immunoprophylaxis with Bacillus Calmette-Guérin (BCG) has been seen as an effective preventive measure due to its ability to stimulate the development of cellular immunity which is essential in controlling the disease, especially in its multibacillary (MB) forms. The association of immunoprophylaxis with chemoprophylaxis in a single dose of rifampicin has been shown to be a promising preventive strategy, although a variety of studies have found instances of early case detection just a few months after BCG vaccination. METHODS/DESIGN: The present study is a phase IV chemoprophylactic clinical trial consisting of administration of a single dose of rifampicin in MB leprosy patient contacts under care at the Souza Araújo Outpatient Clinic/FIOCRUZ as part of a randomized (2:1), double-blind, placebo-controlled study. It is comprised of two groups: 1) rifampicin + BCG; and 2) placebo + BCG. DISCUSSION: The aim is to evaluate whether the use of chemoprophylaxis with a single dose of rifampicin in MB leprosy patient contacts prior to the BCG vaccine would be able to prevent the onset of leprosy in those cases that may occur just a few months after vaccination. Contact subclinical infections (polymerase chain reaction) and the immunological parameters (anti-PGL-1, anti-LID-1, and IFN-γ) will be evaluated and the results will be compared after 12 months of follow-up. TRIAL REGISTRATION: The Brazilian Registry of Clinical Trials (ReBEC), RBR-69QK5P . Retrospectively registered on 1 June 2017.


Asunto(s)
Vacuna BCG/administración & dosificación , Trazado de Contacto , Leprostáticos/administración & dosificación , Lepra Multibacilar/prevención & control , Rifampin/administración & dosificación , Adolescente , Adulto , Anciano , Vacuna BCG/efectos adversos , Brasil , Niño , Preescolar , Ensayos Clínicos Fase IV como Asunto , Método Doble Ciego , Esquema de Medicación , Femenino , Humanos , Lactante , Leprostáticos/efectos adversos , Lepra Multibacilar/inmunología , Lepra Multibacilar/microbiología , Lepra Multibacilar/transmisión , Masculino , Persona de Mediana Edad , Ensayos Clínicos Controlados Aleatorios como Asunto , Rifampin/efectos adversos , Factores de Tiempo , Resultado del Tratamiento , Vacunación , Adulto Joven
7.
PLoS Negl Trop Dis ; 12(3): e0006214, 2018 03.
Artículo en Inglés | MEDLINE | ID: mdl-29565968

RESUMEN

BACKGROUND: Leprosy is a chronic dermato-neurological disease caused by Mycobacterium leprae infection. In 2016, more than 200,000 new cases of leprosy were detected around the world, representing the most frequent cause of infectious irreversible deformities and disabilities. PRINCIPAL FINDINGS: In the present work, we demonstrate a consistent procoagulant profile on 40 reactional and non-reactional multibacillary leprosy patients. A retrospective analysis in search of signs of coagulation abnormalities among 638 leprosy patients identified 35 leprosy patients (5.48%) which displayed a characteristic lipid-like clot formed between blood clot and serum during serum harvesting, herein named 'leprosum clot'. Most of these patients (n = 16, 45.7%) belonged to the lepromatous leprosy pole of the disease. In addition, formation of the leprosum clot was directly correlated with increased plasma levels of soluble tissue factor and von Willebrand factor. High performance thin layer chromatography demonstrated a high content of neutral lipids in the leprosum clot, and proteomic analysis demonstrated that the leprosum clot presented in these patients is highly enriched in fibrin. Remarkably, differential 2D-proteomics analysis between leprosum clots and control clots identified two proteins present only in leprosy patients clots: complement component 3 and 4 and inter-alpha-trypsin inhibitor family heavy chain-related protein (IHRP). In agreement with those observations we demonstrated that M. leprae induces hepatocytes release of IHRP in vitro. CONCLUSIONS: We demonstrated that leprosy MB patients develop a procoagulant status due to high levels of plasmatic fibrinogen, anti-cardiolipin antibodies, von Willebrand factor and soluble tissue factor. We propose that some of these components, fibrinogen for example, presents potential as predictive biomarkers of leprosy reactions, generating tools for earlier diagnosis and treatment of these events.


Asunto(s)
Trastornos de la Coagulación Sanguínea/microbiología , Eritema Nudoso/sangre , Lepra Lepromatosa/sangre , Piel/microbiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Biomarcadores/sangre , Brasil , Niño , Electroforesis en Gel Bidimensional , Electroforesis en Gel de Poliacrilamida , Eritema Nudoso/complicaciones , Femenino , Humanos , Lepra Lepromatosa/complicaciones , Modelos Lineales , Masculino , Espectrometría de Masas , Persona de Mediana Edad , Mycobacterium leprae/aislamiento & purificación , Estudios Prospectivos , Proteómica/métodos , Estudios Retrospectivos , Adulto Joven
8.
An. bras. dermatol ; 93(1): 145-147, Jan.-Feb. 2018. graf
Artículo en Inglés | LILACS | ID: biblio-1038263

RESUMEN

Abstract: Leprosy is a chronic infectious disease caused by Mycobacterium leprae, which affects peripheral nerves, skin and mucous membranes. The impairment of neural function as well as sensory or sensory-motor disabilities in leprosy continue to be a problem that requires careful attention in the management of patients with the aim to avoid or minimize their progression to prevent sequelae. One of the most common characteristics of these ulcers is the tendency to chronicity, with variable therapeutic response. In this article, we shall discuss the therapeutic management of thirteen trophic leprosy ulcers in eight patients using polyhexanide 0.2% products.


Asunto(s)
Humanos , Biguanidas/uso terapéutico , Úlcera del Pie/tratamiento farmacológico , Desinfectantes/uso terapéutico , Resultado del Tratamiento , Úlcera del Pie/complicaciones , Datos Preliminares , Lepra/complicaciones
9.
Rev. méd. Minas Gerais ; 28: [1-4], jan.-dez. 2018.
Artículo en Portugués | LILACS | ID: biblio-970215

RESUMEN

INTRODUÇÃO: A Hanseníase é uma dermatose infectocontagiosa crônica, causada pelo Mycobacterium leprae, caracterizada por apresentar formas clínicas contrastantes, que são dependentes da interação do bacilo com a resposta imune do hospedeiro. Apesar de curável, ela ainda é um problema de saúde pública relevante, pois persiste como endemia em muitos países, dentre eles o Brasil. DESCRIÇÃO DO CASO: Paciente, 58 anos, após tratamento quimioterápico para Carcinoma Ductal Invasivo da Mama, desenvolveu manchas com perda de sensibilidade que após exame clinico e anatomopatológico evidenciou se tratar de uma Reação Reversa Hansênica. DISCUSSÃO: O diagnóstico precoce da hanseníase permanece um importante desafio de saúde pública, principalmente devido à heterogeneidade das suas manifestações clínicas. No caso apresentado, a recuperação imunológica, após tratamento quimioterápico desencadeou a reação reversa hansênica, permitindo o reconhecimento da doença e a sua confirmação diagnóstica. CONCLUSÃO: O diagnóstico precoce da Hanseníase requer o conhecimento não apenas das suas formas clínicas, como também de seus episódios reacionais, já que são durante esses episódios, que ocorre piora das lesões neurológicas e aumento das incapacidades físicas. (AU)


Introduction: Leprosy is a chronic infectious contagious dermatosis caused by Mycobacterium leprae, characterized by presenting contrasting clinical forms, which are dependent on the interaction of the bacillus with a host immune response. Although curable, it is still a relevant public health problem, as it persists as an endemic disease in many countries, including Brazil. Case Description: Patient, 58 years old, after chemotherapy treatment for Invasive Ductal Breast Carcinoma of the Mama, developed spots with loss of sensitivity by clinical and anatomopathological examination evidenced whether it is a Reverse Hansen Reaction. Discussion: The prior diagnosis of leprosy remains an important public health challenge, mainly due to the heterogeneity of its clinical manifestations. In the case, an immunological recovery, a chemotherapeutic treatment triggered the leprosy reverse reaction, allowing the recognition of the disease and its diagnostic confirmation. Conclusion: The previous diagnosis of the applicant leprosy is not only in its clinical forms, but also in its reactional episodes, since it is during these episodes that worsening of the neurological lesions and increase of the physical incapacities occur. (AU)


Asunto(s)
Humanos , Femenino , Persona de Mediana Edad , Lepra , Diagnóstico Precoz , Lepra/diagnóstico , Lepra/prevención & control , Carcinoma Ductal de Mama , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos
10.
s.l; s.n; 2018. 20 p. ilus, tab, graf.
No convencional en Inglés | Sec. Est. Saúde SP, HANSEN, SESSP-ILSLPROD, Sec. Est. Saúde SP, SESSP-ILSLACERVO, Sec. Est. Saúde SP | ID: biblio-1023805

RESUMEN

Hemostatic illnesses are frequently associated with acute and chronic infections. In the present work we demonstrated that leprosy patients developed hemostatic abnormalities, like the formation of an atypical lipid clot mass during sera harvesting, a phenomenon previously observed and never unraveled. We characterize the nature of the "leprosum clot", formed during a protrombotic state developed by some patients. During the proteomic analysis of the leprosum clot we discovered a set of potential serum biomarkers to leprosy reactional episodes diagnosis, which at this moment is based only in clinical features. Taking together, our data suggest that leprosy patients are suffering from a procoagulant status, being beneficiated by the introduction of routine coagulation tests during their treatment, which will aloud physicians to prevent some of the acute clinical symptoms related with superficial vein thrombosis such as cyanosis and tissue necrosis observed during severe cases of leprosy reactional episodes. (AU)


Asunto(s)
Humanos , Masculino , Femenino , Niño , Adolescente , Adulto , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Adulto Joven , Piel/microbiología , Espectrometría de Masas , Trastornos de la Coagulación Sanguínea/microbiología , Biomarcadores/sangre , Electroforesis en Gel Bidimensional , Lepra Lepromatosa/complicaciones , Lepra Lepromatosa/sangre , Modelos Lineales , Proteómica/métodos , Electroforesis en Gel de Poliacrilamida , Eritema Nudoso/complicaciones , Eritema Nudoso/sangre , Mycobacterium leprae/aislamiento & purificación , Estudios Prospectivos , Estudios Retrospectivos
11.
Rev Saude Publica ; 51: 80, 2017 Sep 04.
Artículo en Inglés, Portugués | MEDLINE | ID: mdl-28876410

RESUMEN

OBJECTIVE: Describe the process of cross-cultural adaptation of the "Explanatory Model Interview Catalog - Stigma Scale" for people affected by leprosy in Brazil. METHODS: After being authorized by the author of the scale to use it in the national context, we initiated the five steps process of cross-cultural adaptation: (1) translation, (2) synthesis meeting, (3) back-translation, (4) committee of experts and (5) pre-test. The internal consistency of the scale was evaluated using Cronbach's alpha coefficient. RESULTS: The 15 items of the scale's original version were translated into Brazilian Portuguese. The adapted scale showed evidence of a good understanding of its content, attested both by experts and members of the target population. Its internal consistency was 0.64. CONCLUSIONS: The adapted instrument shows satisfactory internal consistency. It may be useful in future studies that intend to provide broad situational analysis that supports solid public health programs with a focus on effective stigma reduction. In a later study, the construct's validity, criterion, and reproducibility will be evaluated. OBJETIVO: Descrever o processo de adaptação transcultural da "Explanatory Model Interview Catalogue - Stigma Scale" para pessoas afetadas por hanseníase no Brasil. MÉTODOS: Após a autorização do autor da escala para seu uso no contexto nacional, deu-se início aos cinco passos do processo de adaptação transcultural: (1) tradução, (2) reunião de síntese, (3) retrotradução, (4) comitê de peritos e (5) pré-teste. A consistência interna da escala foi avaliada utilizando o coeficiente alfa de Cronbach. RESULTADOS: Os 15 itens da versão original da escala foram traduzidos para a língua portuguesa do Brasil. A escala adaptada apresentou evidência de boa compreensão de seu conteúdo, atestada tanto por peritos como por membros da população alvo. Sua consistência interna foi de 0,64. CONCLUSÕES: O instrumento adaptado apresenta consistência interna satisfatória. Pode ser útil em estudos futuros que intencionem viabilizar ampla análise situacional que sustente programas sólidos de saúde pública com enfoque na efetiva redução de estigma. Em estudo ulterior será avaliada a validade de constructo, critério e reprodutibilidade.


Asunto(s)
Comparación Transcultural , Lepra/psicología , Estigma Social , Encuestas y Cuestionarios , Adulto , Anciano , Brasil , Femenino , Humanos , Lenguaje , Masculino , Persona de Mediana Edad , Traducciones
12.
An Bras Dermatol ; 92(4): 575-577, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28954119

RESUMEN

One of the biggest challenges in treating leprosy is the control of reaction events. Patients with lepromatous leprosy may present reaction type II, or erythema nodosum leprosum, during treatment, and this reaction can remain in a recurrent form after being released from the hospital, requiring the use of thalidomide and/or prednisone for long periods of time, in turn increasing the risk of side effects. Two reports of the use of antiTNF to treat erythema nodosum leprosum were found in the literature. A good response was found after an assay with infliximab and etanercept. This study reports on a patient with lepromatous leprosy and recurrent reaction, controlled by using etanercept and a 10-month follow-up, with the interruption of thalidomide and the maintenance of prednisone at 10 mg/day.


Asunto(s)
Antiinflamatorios no Esteroideos/uso terapéutico , Eritema Nudoso/tratamiento farmacológico , Etanercept/uso terapéutico , Lepra Lepromatosa/tratamiento farmacológico , Adulto , Humanos , Inmunosupresores/uso terapéutico , Masculino , Prednisona/uso terapéutico , Talidomida/uso terapéutico
13.
An. bras. dermatol ; 92(4): 575-577, July-Aug. 2017. graf
Artículo en Inglés | LILACS | ID: biblio-1038255

RESUMEN

Abstract: One of the biggest challenges in treating leprosy is the control of reaction events. Patients with lepromatous leprosy may present reaction type II, or erythema nodosum leprosum, during treatment, and this reaction can remain in a recurrent form after being released from the hospital, requiring the use of thalidomide and/or prednisone for long periods of time, in turn increasing the risk of side effects. Two reports of the use of antiTNF to treat erythema nodosum leprosum were found in the literature. A good response was found after an assay with infliximab and etanercept. This study reports on a patient with lepromatous leprosy and recurrent reaction, controlled by using etanercept and a 10-month follow-up, with the interruption of thalidomide and the maintenance of prednisone at 10 mg/day.


Asunto(s)
Humanos , Masculino , Adulto , Lepra Lepromatosa/tratamiento farmacológico , Antiinflamatorios no Esteroideos/uso terapéutico , Eritema Nudoso/tratamiento farmacológico , Etanercept/uso terapéutico , Talidomida/uso terapéutico , Prednisona/uso terapéutico , Inmunosupresores/uso terapéutico
14.
PLoS Negl Trop Dis ; 11(7): e0005754, 2017 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-28715406

RESUMEN

The pathways that trigger exacerbated immune reactions in leprosy could be determined by genetic variations. Here, in a prospective approach, both genetic and non-genetic variables influencing the amount of time before the development of reactional episodes were studied using Kaplan-Meier survival curves, and the genetic effect was estimated by the Cox proportional-hazards regression model. In a sample including 447 leprosy patients, we confirmed that gender (male), and high bacillary clinical forms are risk factors for leprosy reactions. From the 15 single nucleotide polymorphisms (SNPs) at the 8 candidate genes genotyped (TNF/LTA, IFNG, IL10, TLR1, NOD2, SOD2, and IL6) we observed statistically different survival curves for rs751271 at the NOD2 and rs2069845 at the IL6 genes (log-rank p-values = 0.002 and 0.023, respectively), suggesting an influence on the amount of time before developing leprosy reactions. Cox models showed associations between the SNPs rs751271 at NOD2 and rs2069845 at IL6 with leprosy reactions (HRGT = 0.45, p = 0.002; HRAG = 1.88, p = 0.0008, respectively). Finally, IL-6 and IFN-γ levels were confirmed as high, while IL-10 titers were low in the sera of reactional patients. Rs751271-GT genotype-bearing individuals correlated (p = 0.05) with lower levels of IL-6 in sera samples, corroborating the genetic results. Although the experimental size may be considered a limitation of the study, the findings confirm the association of classical variables such as sex and clinical forms with leprosy, demonstrating the consistency of the results. From the results, we conclude that SNPs at the NOD2 and IL6 genes are associated with leprosy reactions as an outcome. NOD2 also has a clear functional pro-inflammatory link that is coherent with the exacerbated responses observed in these patients.


Asunto(s)
Predisposición Genética a la Enfermedad , Inflamación/patología , Interleucina-6/genética , Lepra/patología , Proteína Adaptadora de Señalización NOD2/genética , Polimorfismo de Nucleótido Simple , Adulto , Estudios de Cohortes , Femenino , Humanos , Inflamación/genética , Lepra/genética , Masculino , Persona de Mediana Edad , Factores de Riesgo
15.
Fontilles, Rev. leprol ; 31(1): 21-32, ene.-abr. 2017. graf, tab
Artículo en Español | IBECS | ID: ibc-163766

RESUMEN

Antecedentes: El Mycobacterium leprae y el VIH causan enfermedades de tipo infecciosas muy preocupantes para la sanidad mundial. Son especial motivo de preocupación cuando los pacientes se coinfectan con ambos agentes patógenos. El objetivo de este estudio es evaluar los episodios de reacción de reversión (RR) y el efecto del uso de corticosteroides sobre el tratamiento de pacientes de lepra borderline tuberculoide co-infectados con el virus de inmunodeficiencia humana (VIH). Métodos: Este trabajo es un estudio retrospectivo de cohortes en el que se observan las respuestas a la terapia con corticoides y sus manifestaciones clínicas. Se analizan variables durante y después de la multiterapia farmacológica de la Organización Mundial de la Salud (OMS) entre el primer y último día de la toma de prednisona, con un máximo de hasta 6 meses posteriores a haber iniciado la terapia corticosteroidea. Resultados: Se incluye un total de 22 casos VIH-positivos y 28 VIH-negativos. La pérdida de sensibilidad y el engrosamiento neural eran estadísticamente significativos mientras que las lesiones ulceradas sólo se detectaron en el grupo coinfectado. La mayoría de pacientes fueron diagnosticados de lepra en fase de leprorreacción RR y seis pacientes manifestaron RR como un síndrome inflamatorio de restitución inmunológica. De promedio, ambos grupos recibieron dosis similares de corticosteroides (diferencia de 0·1 mg/kg/día). Conclusiones: Las manifestaciones clínicas de ambos grupos fueron similares y la mejoría general fue debida a la administración de corticoides. Registro del ensayo: Este trabajo fue presentado y aprobado por el Ethics Committee on Research of the Oswaldo Cruz Institute el 8 de agosto de 2011 (registro 616/11)


Background: Mycobacterium leprae and HIV cause infectious diseases of great concern for the public health care sector worldwide. Both are especially worrisome diseases when patients become co-infected and exhibit the expected clinical exuberance. The objective of this study was to evaluate episodes of reversal reaction (RR) and the effect of the use of corticosteroids on the treatment of borderline tuberculoid leprosy patients co-infected with the human immunodeficiency virus (HIV). Methods: This is a retrospective cohort study in which the clinical manifestations of the patients and their responses to corticosteroid therapy were observed. Variables were analysed during and after multidrug therapy between the first and last days of prednisone, which occurred up to a maximum of 6 months after initiating corticosteroid therapy. Results: A total of 22 HIV-positive and 28 HIV-negative cases were included. Loss of sensitivity and neural thickening were statistically significant while clinically ulcerated lesions were only observed in the co-infected group. Most patients were diagnosed with leprosy in the presence of RR and six patients manifested RR as an immune reconstitution inflammatory syndrome. On average, both groups received similar doses of corticosteroids (difference of 0·1 mg/kg/day).Conclusions: It is of special interest that the clinical manifestations in both groups were found to be similar and that overall improvement occurred as a result of corticosteroid therapy.Trial registration This work was submitted to and approved by the Ethics Committee on Research of the Oswaldo Cruz Institute on August 8, 2011 (registration 616/11)


Asunto(s)
Humanos , Femenino , Masculino , Adolescente , Corticoesteroides/uso terapéutico , Lepra Tuberculoide/tratamiento farmacológico , Infecciones por VIH/complicaciones , Coinfección/tratamiento farmacológico , Lepra Tuberculoide/complicaciones , Estudios Retrospectivos , Mycobacterium leprae/patogenicidad , Terapia Antirretroviral Altamente Activa
16.
PLoS Negl Trop Dis ; 11(2): e0005364, 2017 02.
Artículo en Inglés | MEDLINE | ID: mdl-28192426

RESUMEN

BACKGROUND: Leprosy remains an important public health problem in Brazil where 28,761 new cases were diagnosed in 2015, the second highest number of new cases detected globally. The disease is caused by Mycobacterium leprae, a pathogen spread by patients with multibacillary (MB) leprosy. This study was designed to identify population groups most at risk for MB disease in Brazil, contributing to new ideas for early diagnosis and leprosy control. METHODS: A national databank of cases reported in Brazil (2001-2013) was used to evaluate epidemiological characteristics of MB leprosy. Additionally, the databank of a leprosy reference center was used to determine factors associated with higher bacillary loads. RESULTS: A total of 541,090 cases were analyzed. New case detection rates (NCDRs) increased with age, especially for men with MB leprosy, reaching 44.8 new cases/100,000 population in 65-69 year olds. Males and subjects older than 59 years had twice the odds of MB leprosy than females and younger cases (OR = 2.36, CI95% = 2.33-2.38; OR = 1.99, CI95% = 1.96-2.02, respectively). Bacillary load was higher in male and in patients aged 20-39 and 40-59 years compared to females and other age groups. From 2003 to 2013, there was a progressive reduction in annual NCDRs and an increase in the percentage of MB cases and of elderly patients in Brazil. These data suggest reduction of leprosy transmission in the country. CONCLUSION: Public health policies for leprosy control in endemic areas in Brazil should include activities especially addressed to men and to the elderly in order to further reduce M. leprae transmission.


Asunto(s)
Lepra Multibacilar/epidemiología , Grupos de Población , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Brasil/epidemiología , Niño , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , Medición de Riesgo , Factores de Riesgo , Adulto Joven
17.
PLoS Pathog ; 13(1): e1006103, 2017 01.
Artículo en Inglés | MEDLINE | ID: mdl-28056107

RESUMEN

Leprosy is a chronic infectious disease that may present different clinical forms according to the immune response of the host. Levels of IFN-γ are significantly raised in paucibacillary tuberculoid (T-lep) when compared with multibacillary lepromatous (L-lep) patients. IFN-γ primes macrophages for inflammatory activation and induces the autophagy antimicrobial mechanism. The involvement of autophagy in the immune response against Mycobacterium leprae remains unexplored. Here, we demonstrated by different autophagic assays that LC3-positive autophagosomes were predominantly observed in T-lep when compared with L-lep lesions and skin-derived macrophages. Accumulation of the autophagic receptors SQSTM1/p62 and NBR1, expression of lysosomal antimicrobial peptides and colocalization analysis of autolysosomes revealed an impairment of the autophagic flux in L-lep cells, which was restored by IFN-γ or rapamycin treatment. Autophagy PCR array gene-expression analysis revealed a significantly upregulation of autophagy genes (BECN1, GPSM3, ATG14, APOL1, and TPR) in T-lep cells. Furthermore, an upregulation of autophagy genes (TPR, GFI1B and GNAI3) as well as LC3 levels was observed in cells of L-lep patients that developed type 1 reaction (T1R) episodes, an acute inflammatory condition associated with increased IFN-γ levels. Finally, we observed increased BCL2 expression in L-lep cells that could be responsible for the blockage of BECN1-mediated autophagy. In addition, in vitro studies demonstrated that dead, but not live M. leprae can induce autophagy in primary and lineage human monocytes, and that live mycobacteria can reduce the autophagy activation triggered by dead mycobacteria, suggesting that M. leprae may hamper the autophagic machinery as an immune escape mechanism. Together, these results indicate that autophagy is an important innate mechanism associated with the M. leprae control in skin macrophages.


Asunto(s)
Autofagia/fisiología , Lepra/inmunología , Piel/microbiología , Adulto , Anciano , Western Blotting , Ensayo de Inmunoadsorción Enzimática , Femenino , Técnica del Anticuerpo Fluorescente , Humanos , Inmunohistoquímica , Interferón gamma/inmunología , Lepra/patología , Macrófagos/inmunología , Masculino , Microscopía Electrónica de Transmisión , Persona de Mediana Edad , Mycobacterium leprae/inmunología , Reacción en Cadena de la Polimerasa , Piel/inmunología , Piel/patología , Transcriptoma , Adulto Joven
18.
Artículo en Inglés | LILACS-Express | ID: biblio-903230

RESUMEN

ABSTRACT OBJECTIVE Describe the process of cross-cultural adaptation of the "Explanatory Model Interview Catalog - Stigma Scale" for people affected by leprosy in Brazil. METHODS After being authorized by the author of the scale to use it in the national context, we initiated the five steps process of cross-cultural adaptation: (1) translation, (2) synthesis meeting, (3) back-translation, (4) committee of experts and (5) pre-test. The internal consistency of the scale was evaluated using Cronbach's alpha coefficient. RESULTS The 15 items of the scale's original version were translated into Brazilian Portuguese. The adapted scale showed evidence of a good understanding of its content, attested both by experts and members of the target population. Its internal consistency was 0.64. CONCLUSIONS The adapted instrument shows satisfactory internal consistency. It may be useful in future studies that intend to provide broad situational analysis that supports solid public health programs with a focus on effective stigma reduction. In a later study, the construct's validity, criterion, and reproducibility will be evaluated.


RESUMO OBJETIVO Descrever o processo de adaptação transcultural da "Explanatory Model Interview Catalogue - Stigma Scale" para pessoas afetadas por hanseníase no Brasil. MÉTODOS Após a autorização do autor da escala para seu uso no contexto nacional, deu-se início aos cinco passos do processo de adaptação transcultural: (1) tradução, (2) reunião de síntese, (3) retrotradução, (4) comitê de peritos e (5) pré-teste. A consistência interna da escala foi avaliada utilizando o coeficiente alfa de Cronbach. RESULTADOS Os 15 itens da versão original da escala foram traduzidos para a língua portuguesa do Brasil. A escala adaptada apresentou evidência de boa compreensão de seu conteúdo, atestada tanto por peritos como por membros da população alvo. Sua consistência interna foi de 0,64. CONCLUSÕES O instrumento adaptado apresenta consistência interna satisfatória. Pode ser útil em estudos futuros que intencionem viabilizar ampla análise situacional que sustente programas sólidos de saúde pública com enfoque na efetiva redução de estigma. Em estudo ulterior será avaliada a validade de constructo, critério e reprodutibilidade.

19.
Artículo en Inglés | LILACS-Express | ID: biblio-903350

RESUMEN

ABSTRACT OBJECTIVE Describe the process of cross-cultural adaptation of the "Explanatory Model Interview Catalog - Stigma Scale" for people affected by leprosy in Brazil. METHODS After being authorized by the author of the scale to use it in the national context, we initiated the five steps process of cross-cultural adaptation: (1) translation, (2) synthesis meeting, (3) back-translation, (4) committee of experts and (5) pre-test. The internal consistency of the scale was evaluated using Cronbach's alpha coefficient. RESULTS The 15 items of the scale's original version were translated into Brazilian Portuguese. The adapted scale showed evidence of a good understanding of its content, attested both by experts and members of the target population. Its internal consistency was 0.64. CONCLUSIONS The adapted instrument shows satisfactory internal consistency. It may be useful in future studies that intend to provide broad situational analysis that supports solid public health programs with a focus on effective stigma reduction. In a later study, the construct's validity, criterion, and reproducibility will be evaluated.


RESUMO OBJETIVO Descrever o processo de adaptação transcultural da "Explanatory Model Interview Catalogue - Stigma Scale" para pessoas afetadas por hanseníase no Brasil. MÉTODOS Após a autorização do autor da escala para seu uso no contexto nacional, deu-se início aos cinco passos do processo de adaptação transcultural: (1) tradução, (2) reunião de síntese, (3) retrotradução, (4) comitê de peritos e (5) pré-teste. A consistência interna da escala foi avaliada utilizando o coeficiente alfa de Cronbach. RESULTADOS Os 15 itens da versão original da escala foram traduzidos para a língua portuguesa do Brasil. A escala adaptada apresentou evidência de boa compreensão de seu conteúdo, atestada tanto por peritos como por membros da população alvo. Sua consistência interna foi de 0,64. CONCLUSÕES O instrumento adaptado apresenta consistência interna satisfatória. Pode ser útil em estudos futuros que intencionem viabilizar ampla análise situacional que sustente programas sólidos de saúde pública com enfoque na efetiva redução de estigma. Em estudo ulterior será avaliada a validade de constructo, critério e reprodutibilidade.

20.
s.l; Elsevier; 2017. 10 p. tab, graf.
No convencional en Inglés | Sec. Est. Saúde SP, HANSEN, SESSP-ILSLPROD, Sec. Est. Saúde SP, SESSP-ILSLACERVO, Sec. Est. Saúde SP | ID: biblio-1052567

RESUMEN

Our previous study has demonstrated that IL-10 may modulate both indoleamine 2,3-dioxygenase (IDO) and CD163 expression in lepromatous leprosy (LL) cells, favoring Mycobacterium leprae persistence through induction of regulatory pathways and iron storage. Here, we observed that in LL lesion cells there is an increase in the expression of proteins involved in iron metabolism such as hemoglobin (Hb), haptoglobin, heme oxygenase 1 and transferrin receptor 1 (TfR1) when compared to tuberculoid leprosy (BT) cells. We also found increased iron deposits and diminished expression of the iron exporter ferroportin 1 in LL lesion cells. Hemin, but not FeSO stimulation, was able to enhance M. leprae viability by a mechanism that involves IDO. Analysis of cell phenotype in lesions demonstrated a predominance of M2 markers in LL when compared with BT lesion cells. A positive correlation between CD163 and PPARG with the bacillary index (BI) was observed. In contrast, TNF, STAT1 and CSF2 presented a negative correlation with the BI. In summary, this study demonstrates that iron may regulate IDO expression by a mechanism that involves IL-10, which may contribute for the predominance of M2-like phenotype in LL lesions that favors the phagocytosis and maintenance of M. leprae in host cells.


Asunto(s)
Humanos , Masculino , Femenino , Adulto , Persona de Mediana Edad , Immunoblotting , Lepra Lepromatosa/metabolismo , Lepra Lepromatosa/microbiología , Técnicas para Inmunoenzimas , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Indolamina-Pirrol 2,3,-Dioxigenasa/fisiología , Indolamina-Pirrol 2,3,-Dioxigenasa/metabolismo , Hierro/fisiología , Hierro/metabolismo , Mycobacterium leprae/fisiología , Mycobacterium leprae/metabolismo
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