Fibrosis: a distinguishing feature in the pathology of neural leprosy
Mem. Inst. Oswaldo Cruz
; 114: e190056, 2019. tab, graf
Artículo
en Inglés
| LILACS
| ID: biblio-1012667
Biblioteca responsable:
BR1.1
ABSTRACT
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.
Texto completo:
Disponible
Colección:
Bases de datos internacionales
Contexto en salud:
Agenda de Salud Sostenible para las Américas
/
ODS3 - Salud y Bienestar
/
Enfermedades Desatendidas
Problema de salud:
Objetivo 10: Enfermedades transmisibles
/
Meta 3.3: Poner fin a las enfermedades desatendidas y detener enfermedades transmisibles
/
Lepra
/
Enfermedades Desatendidas
Base de datos:
LILACS
Asunto principal:
Fibrosis
Tipo de estudio:
Estudio diagnóstico
Límite:
Humanos
Idioma:
Inglés
Revista:
Mem. Inst. Oswaldo Cruz
Asunto de la revista:
Medicina Tropical
/
Parasitología
Año:
2019
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Fundação Oswaldo Cruz/BR
/
Universidade do Estado do Rio de Janeiro/BR