Liposomes derived from
Dendritic cells
Mycobacterium smegmatis
liposomes
Journal
International journal of mycobacteriology
ISSN: 2212-554X
Titre abrégé: Int J Mycobacteriol
Pays: India
ID NLM: 101615660
Informations de publication
Date de publication:
Historique:
entrez:
31
8
2020
pubmed:
31
8
2020
medline:
8
7
2021
Statut:
ppublish
Résumé
Tuberculosis (TB) is the leading cause of mortality due to infectious diseases. The development of new generation vaccines against TB is of paramount importance for the control of the disease. In previous studies, liposomes obtained from lipids of Mycobacterium smegmatis (LMs) demonstrated their immunogenicity and protective capacity against Mycobacterium tuberculosis in mice. To characterize the immunomodulatory capacity of this experimental vaccine candidate, in the current study, the stimulatory capacity of LMs was determined on bone marrow-derived dendritic cells (BMDCs) from mice. LMs were obtained and incubated with mature BMDCs. The internalization of LMs by BMDCs was studied by confocal microscopy, and the LMs immune-stimulatory capacity was determined by the expression of surface molecules (CD86 and MHCII) and the cytokine production (interleukin [IL]-12, interferon-Υ, tumor necrosis factor-α, and IL-10) 24 h after exposure to LMs. The interaction of LMs with BMDCs and its internalization was demonstrated as well as the immune activation of BMDCs, characterized by the increased expression of CD86 and the production of IL-12. The LMs internalization and immune activation of BMDCs were blocked in the presence of cytochalasin, filipin III and chlorpromazine, which demonstrated that internalization of LMs by BMDCs is a key process for the LMs induced immune activation of BMDCs. The results obtained support the further evaluation of LMs as a mycobacterial vaccine, adjuvant, and in immunotherapy.
Sections du résumé
Background
Tuberculosis (TB) is the leading cause of mortality due to infectious diseases. The development of new generation vaccines against TB is of paramount importance for the control of the disease. In previous studies, liposomes obtained from lipids of Mycobacterium smegmatis (LMs) demonstrated their immunogenicity and protective capacity against Mycobacterium tuberculosis in mice. To characterize the immunomodulatory capacity of this experimental vaccine candidate, in the current study, the stimulatory capacity of LMs was determined on bone marrow-derived dendritic cells (BMDCs) from mice.
Methods
LMs were obtained and incubated with mature BMDCs. The internalization of LMs by BMDCs was studied by confocal microscopy, and the LMs immune-stimulatory capacity was determined by the expression of surface molecules (CD86 and MHCII) and the cytokine production (interleukin [IL]-12, interferon-Υ, tumor necrosis factor-α, and IL-10) 24 h after exposure to LMs.
Results
The interaction of LMs with BMDCs and its internalization was demonstrated as well as the immune activation of BMDCs, characterized by the increased expression of CD86 and the production of IL-12. The LMs internalization and immune activation of BMDCs were blocked in the presence of cytochalasin, filipin III and chlorpromazine, which demonstrated that internalization of LMs by BMDCs is a key process for the LMs induced immune activation of BMDCs.
Conclusions
The results obtained support the further evaluation of LMs as a mycobacterial vaccine, adjuvant, and in immunotherapy.
Identifiants
pubmed: 32862158
pii: IntJMycobacteriol_2020_9_3_261_293551
doi: 10.4103/ijmy.ijmy_82_20
doi:
Substances chimiques
Cytokines
0
Lipids
0
Liposomes
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
261-267Déclaration de conflit d'intérêts
None