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https://www.arca.fiocruz.br/handle/icict/39259
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2022-01-01
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- IOC - Artigos de Periódicos [12828]
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A BACTEROIDES FRAGILIS SURFACE GLYCOPROTEIN MEDIATES THE INTERACTION BETWEEN THE BACTERIUM AND THE EXTRACELLULAR MATRIX COMPONENT LAMININ-1
Laminin-1
Componentes da matriz extracelular
Glicoproteína
Author
Affilliation
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Programa de Bioengenharia & Biotecnologia Animal. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bacteriologia. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Programa de Bioengenharia & Biotecnologia Animal. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Programa de Bioengenharia & Biotecnologia Animal. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Bacteriologia. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Biofísica Carlos Chagas Filho. Programa de Bioengenharia & Biotecnologia Animal. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Prof. Paulo de Góes. Departamento de Microbiologia Médica. Rio de Janeiro, RJ, Brasil.
Abstract
The adherence of Bacteroides fragilis strains to immobilized laminin-1 (LMN-1) was investigated using this protein adsorbed onto glass. Among the 27 strains isolated from infectious processes and assayed, 13 presented strong adherence to LMN-1. Among them, two strains, MC2 and 1081, showed the strongest association, and for that reason they were selected for further studies in which adherence to this protein was confronted with both physical-chemical and enzymatic treatments, along with concurrence assays with the LMN-1 molecule itself and the LMN-1-residing amino acid sequences (RGD, IKVAV, YIGSR, AG73, A13 and C16). The chemical and enzymatic treatments resulted in sharp decreases in binding rates of those strains, and competition experiments with LMN-1- residing amino acids revealed that, except for RGD and A13, all the others were effective at reducing bacterial binding of the bacteria. The outer membrane proteins (OMPs) of B. fragilis were extracted and assayed onto dot-blotted LMN-1, and when the extracts were chemically treated, especially with metasodium periodate, a drastic reduction in bacterial binding occurred. Results of the latter assays clearly indicate that bacterial molecules involved in both recognition and binding of B. fragilis to LMN-1 are present in OMP extracts. Taken together, our results strongly indicate that a B. fragilis surface glycoprotein may play a key role in bacterial association with LMN-1.
Keywords in Portuguese
Bacteroides fragilisLaminin-1
Componentes da matriz extracelular
Glicoproteína
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