Artículo
Trypanosoma cruzi heme responsive gene ( Tc HRG) plays a central role in orchestrating heme uptake in epimastigotes.
Tevere, Evelyn
; Di Capua, Cecilia Beatriz
; Chasen, Nathan Michael; Etheridge, Ronald Drew; Cricco, Julia Alejandra



Fecha de publicación:
12/2023
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Febs Journal
ISSN:
1742-464X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Trypanosoma cruzi, a heme auxotrophic parasite, can control intracellular heme content by modulating heme responsive gene (TcHRG) expression when a free heme source is added to an axenic culture. Herein, we explored the role of TcHRG protein in regulating the uptake of heme derived from hemoglobin in epimastigotes. We demonstrate that the endogenous TcHRG (protein and mRNA) responded similarly to bound (hemoglobin) and free (hemin) heme. Endogenous TcHRG was found in the flagellar pocket boundaries and partially overlapping with the mitochondrion. On the other hand, endocytic null parasites were able to develop and exhibited a similar heme content compared to wild type when fed with hemoglobin, indicating that endocytosis is not the main entrance pathway for hemoglobin-derived heme in this parasite. Moreover, the overexpression of TcHRG led to an increase in heme content when hemoglobin was used as the heme source. Taken together, these results suggest that the uptake of hemoglobin-derived heme likely occurs through extracellular proteolysis of hemoglobin via the flagellar pocket, and this process is governed by TcHRG. In sum, T. cruzi epimastigotes control heme homeostasis by modulating TcHRG expression independently of the available source of heme.
Palabras clave:
TRYPANOSOMA CRUZI
,
CHAGAS DISEASE
,
HEME
,
HEMOGLOBIN
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IBR)
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Articulos de INST.DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Citación
Tevere, Evelyn; Di Capua, Cecilia Beatriz; Chasen, Nathan Michael; Etheridge, Ronald Drew; Cricco, Julia Alejandra; Trypanosoma cruzi heme responsive gene ( Tc HRG) plays a central role in orchestrating heme uptake in epimastigotes.; Wiley Blackwell Publishing, Inc; Febs Journal; 291; 6; 12-2023; 1186-1198
Compartir
Altmétricas