BACKGROUND: Encapsulation of Porphyromonas gingivalis has been demonstrated as responsible of several host immunological changes, which have been associated with the pathogenesis of periodontitis. Using a murine model of periodontitis and two isogenic non-capsulated mutants of P. gingivalis, this study aimed to analyze whether P. gingivalis encapsulation induces more severe alveolar bone resorption, and whether this bone loss is associated with a T-helper (Th)1 and Th17-pattern of immune response. METHODS: Experimental periodontal infections were generated by oral inoculation with the encapsulated W50 wild-type strain or isogenic non-encapsulated ΔPG0116-PG0120 (GPA) and ΔPG0109-PG0118 (GPC) mutants of P. gingivalis. Periodontal infections induced with the encapsulated HG184 or non-encapsulated ATCC 33277 strains of P. gingivalis were used as controls. Alveolar bone resorption was analyzed using microcomputed tomography and scanning electron microscopy. The expression levels of Th1, Th2, Th17, or T regulatory-associated cytokines and RANKL, as well as the periodontal bacterial load, were quantified by quantitative polymerase chain reaction. The detection of Th1 and Th17 lymphocytes was analyzed by flow cytometry. RESULTS: In the periodontal lesions, both capsular-defective knockout mutant strains of P. gingivalis induced less alveolar bone resorption than the encapsulated W50 wild-type strain. This decreased bone loss was associated with a dismissed RANKL expression, decreased Th1- and Th17-type of cytokine expression, reduced Th1 and Th17 lymphocyte detection, and low osteoclast finding. CONCLUSION: These data demonstrate that encapsulation of P. gingivalis plays a key role in the alveolar bone resorption induced during periodontitis, and this bone loss is associated with a Th1- and Th17-pattern of immune response triggered in the periodontal lesions.
BACKGROUND: Encapsulation of Porphyromonas gingivalis has been demonstrated as responsible of several host immunological changes, which have been associated with the pathogenesis of periodontitis. Using a murine model of periodontitis and two isogenic non-capsulated mutants of P. gingivalis, this study aimed to analyze whether P. gingivalis encapsulation induces more severe alveolar bone resorption, and whether this bone loss is associated with a T-helper (Th)1 and Th17-pattern of immune response. METHODS: Experimental periodontal infections were generated by oral inoculation with the encapsulated W50 wild-type strain or isogenic non-encapsulated ΔPG0116-PG0120 (GPA) and ΔPG0109-PG0118 (GPC) mutants of P. gingivalis. Periodontal infections induced with the encapsulated HG184 or non-encapsulated ATCC 33277 strains of P. gingivalis were used as controls. Alveolar bone resorption was analyzed using microcomputed tomography and scanning electron microscopy. The expression levels of Th1, Th2, Th17, or T regulatory-associated cytokines and RANKL, as well as the periodontal bacterial load, were quantified by quantitative polymerase chain reaction. The detection of Th1 and Th17 lymphocytes was analyzed by flow cytometry. RESULTS: In the periodontal lesions, both capsular-defective knockout mutant strains of P. gingivalis induced less alveolar bone resorption than the encapsulated W50 wild-type strain. This decreased bone loss was associated with a dismissed RANKL expression, decreased Th1- and Th17-type of cytokine expression, reduced Th1 and Th17 lymphocyte detection, and low osteoclast finding. CONCLUSION: These data demonstrate that encapsulation of P. gingivalis plays a key role in the alveolar bone resorption induced during periodontitis, and this bone loss is associated with a Th1- and Th17-pattern of immune response triggered in the periodontal lesions.
Authors: Jessica D Hathaway-Schrader; Matthew D Carson; Joy E Gerasco; Amy J Warner; Brooks A Swanson; J Ignacio Aguirre; Caroline Westwater; Bei Liu; Chad M Novince Journal: Lab Invest Date: 2021-12-21 Impact factor: 5.502
Authors: Brooks A Swanson; Matthew D Carson; Jessica D Hathaway-Schrader; Amy J Warner; Joy E Kirkpatrick; Alexa Corker; Alexander V Alekseyenko; Caroline Westwater; J Ignacio Aguirre; Chad M Novince Journal: FASEB J Date: 2021-11 Impact factor: 5.191
Authors: Jessica D Hathaway-Schrader; Johannes D Aartun; Nicole A Poulides; Megan B Kuhn; Blakely E McCormick; Michael E Chew; Emily Huang; Richard P Darveau; Caroline Westwater; Chad M Novince Journal: JCI Insight Date: 2022-02-22
Authors: Luis Daniel Sansores-España; Samanta Melgar-Rodríguez; Katherine Olivares-Sagredo; Emilio A Cafferata; Víctor Manuel Martínez-Aguilar; Rolando Vernal; Andrea Cristina Paula-Lima; Jaime Díaz-Zúñiga Journal: Front Aging Date: 2021-12-10
Authors: Carolina Rojas; Michelle P García; Alan F Polanco; Luis González-Osuna; Alfredo Sierra-Cristancho; Samanta Melgar-Rodríguez; Emilio A Cafferata; Rolando Vernal Journal: Front Immunol Date: 2021-06-17 Impact factor: 7.561