Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum
Objective: To investigate the role of toll-like receptor 2 (TLR2) in inflammatory activity of macrophage infected with the recombinant Mycobacterium bovis bacillus Calmette-Guerin (rBCG). Methods: Mouse macrophage cell line J774A.1 was infected with Mycobacterium bovis bacillus Calmette-Guerin (BCG)...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wolters Kluwer Medknow Publications
2018-01-01
|
Series: | Asian Pacific Journal of Tropical Biomedicine |
Subjects: | |
Online Access: | http://www.apjtb.org/article.asp?issn=2221-1691;year=2018;volume=8;issue=7;spage=333;epage=339;aulast=Zakaria |
_version_ | 1811326953471344640 |
---|---|
author | Nor Munirah Zakaria Rapeah Suppian Norazmi Mohd Nor Nor Fazila Che Mat |
author_facet | Nor Munirah Zakaria Rapeah Suppian Norazmi Mohd Nor Nor Fazila Che Mat |
author_sort | Nor Munirah Zakaria |
collection | DOAJ |
description | Objective: To investigate the role of toll-like receptor 2 (TLR2) in inflammatory activity of macrophage infected with the recombinant Mycobacterium bovis bacillus Calmette-Guerin (rBCG). Methods: Mouse macrophage cell line J774A.1 was infected with Mycobacterium bovis bacillus Calmette-Guerin (BCG) and rBCG cultures for 48 h in the presence or absence of 10 μg/mL of TLR2 inhibitor. Untreated macrophages were used as a negative control while lipopolysaccharide-stimulated macrophages were used as a positive control. The ability of the macrophage to engulf the BCG and rBCG in the absence or presence of TLR2 inhibitor was assessed using a phagocytic assay, while the production of inflammatory cytokines and nitric oxide by the infected macrophages was evaluated using ELISA and Griess reagent method, while the expression of the inducible nitric oxide synthase was determined using Western blot analysis. Results: The results showed that blocking TLR2 function reduced the phagocytic activity, nitric oxide production and proinflammatory cytokine secretion such as TNF- α, IL-1 β and IL-12p40 as well as inducible nitric oxide synthase expression in the infected macrophages. These data showed the importance of TLR2 in the activation of macrophages following BCG and rBCG infections. Conclusions: Through exploring the immunological mechanism which underlies the protection conferred by the candidate vaccine, this study will improve our understanding of the vaccine candidate’s mechanism to protect the host from malaria infection. |
first_indexed | 2024-04-13T14:57:42Z |
format | Article |
id | doaj.art-09de0349b4c74829a665291fe81254c0 |
institution | Directory Open Access Journal |
issn | 2221-1691 |
language | English |
last_indexed | 2024-04-13T14:57:42Z |
publishDate | 2018-01-01 |
publisher | Wolters Kluwer Medknow Publications |
record_format | Article |
series | Asian Pacific Journal of Tropical Biomedicine |
spelling | doaj.art-09de0349b4c74829a665291fe81254c02022-12-22T02:42:23ZengWolters Kluwer Medknow PublicationsAsian Pacific Journal of Tropical Biomedicine2221-16912018-01-018733333910.4103/2221-1691.237075Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparumNor Munirah ZakariaRapeah SuppianNorazmi Mohd NorNor Fazila Che MatObjective: To investigate the role of toll-like receptor 2 (TLR2) in inflammatory activity of macrophage infected with the recombinant Mycobacterium bovis bacillus Calmette-Guerin (rBCG). Methods: Mouse macrophage cell line J774A.1 was infected with Mycobacterium bovis bacillus Calmette-Guerin (BCG) and rBCG cultures for 48 h in the presence or absence of 10 μg/mL of TLR2 inhibitor. Untreated macrophages were used as a negative control while lipopolysaccharide-stimulated macrophages were used as a positive control. The ability of the macrophage to engulf the BCG and rBCG in the absence or presence of TLR2 inhibitor was assessed using a phagocytic assay, while the production of inflammatory cytokines and nitric oxide by the infected macrophages was evaluated using ELISA and Griess reagent method, while the expression of the inducible nitric oxide synthase was determined using Western blot analysis. Results: The results showed that blocking TLR2 function reduced the phagocytic activity, nitric oxide production and proinflammatory cytokine secretion such as TNF- α, IL-1 β and IL-12p40 as well as inducible nitric oxide synthase expression in the infected macrophages. These data showed the importance of TLR2 in the activation of macrophages following BCG and rBCG infections. Conclusions: Through exploring the immunological mechanism which underlies the protection conferred by the candidate vaccine, this study will improve our understanding of the vaccine candidate’s mechanism to protect the host from malaria infection.http://www.apjtb.org/article.asp?issn=2221-1691;year=2018;volume=8;issue=7;spage=333;epage=339;aulast=Zakariamacrophagesmycobacterium bovis bacillus calmette-guerinplasmodium falciparumproinflammatory cytokinetoll-like receptor 2 |
spellingShingle | Nor Munirah Zakaria Rapeah Suppian Norazmi Mohd Nor Nor Fazila Che Mat Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum Asian Pacific Journal of Tropical Biomedicine macrophages mycobacterium bovis bacillus calmette-guerin plasmodium falciparum proinflammatory cytokine toll-like receptor 2 |
title | Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum |
title_full | Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum |
title_fullStr | Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum |
title_full_unstemmed | Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum |
title_short | Role of toll like-receptor 2 in inflammatory activity of macrophage infected with a recombinant BCG expressing the C-terminus of merozoite surface protein-1 of Plasmodium falciparum |
title_sort | role of toll like receptor 2 in inflammatory activity of macrophage infected with a recombinant bcg expressing the c terminus of merozoite surface protein 1 of plasmodium falciparum |
topic | macrophages mycobacterium bovis bacillus calmette-guerin plasmodium falciparum proinflammatory cytokine toll-like receptor 2 |
url | http://www.apjtb.org/article.asp?issn=2221-1691;year=2018;volume=8;issue=7;spage=333;epage=339;aulast=Zakaria |
work_keys_str_mv | AT normunirahzakaria roleoftolllikereceptor2ininflammatoryactivityofmacrophageinfectedwitharecombinantbcgexpressingthecterminusofmerozoitesurfaceprotein1ofplasmodiumfalciparum AT rapeahsuppian roleoftolllikereceptor2ininflammatoryactivityofmacrophageinfectedwitharecombinantbcgexpressingthecterminusofmerozoitesurfaceprotein1ofplasmodiumfalciparum AT norazmimohdnor roleoftolllikereceptor2ininflammatoryactivityofmacrophageinfectedwitharecombinantbcgexpressingthecterminusofmerozoitesurfaceprotein1ofplasmodiumfalciparum AT norfazilachemat roleoftolllikereceptor2ininflammatoryactivityofmacrophageinfectedwitharecombinantbcgexpressingthecterminusofmerozoitesurfaceprotein1ofplasmodiumfalciparum |