The periodontal pathogen Porphyromonas gingivalis cleaves apoB-100 and increases the expression of apoM in LDL in whole blood leading to cell proliferation
2008 (English)In: Journal of Internal Medicine, ISSN 0954-6820, E-ISSN 1365-2796, Vol. 263, no 5, 558-571 p.Article in journal (Refereed) Published
Objective: Several studies support an association between periodontal disease and atherosclerosis with a crucial role for the pathogen Porphyromonas gingivalis. This study aims to investigate the proteolytic and oxidative activity of P. gingivalis on LDL in a whole blood system by using a proteomic approach and analyze the effects of P. gingivalis-modifed LDL on cell proliferation.
Methods: The cellular effects of P. gingivalis in human whole blood were assessed using lumi-aggregometry analyzing reactive oxygen species (ROS) production and aggregation. Blood was incubated for 30 min with P. gingivalis, whereafter LDL was isolated and a proteomic approach was applied to examine protein expression. LDL-oxidation was determined by analyzing the formation of protein carbonyls. The effects of P. gingivalis-modifed LDL on fibroblast proliferation were studied using the MTS-assay.
Results: Incubation of whole blood with P. gingivalis caused an extensive aggregation and ROS-production, indicating platelet and leukocyte activation. LDL prepared from the bacteria-exposed blood showed an increased protein oxidation, elevated levels of apoM and formation of two apoB-100 N-terminal fragments. P. gingivalis-modified LDL markedly increased the growth of fibroblasts. Inhibition of gingipain R suppressed the modification of LDL by P. gingivalis.
Conclusions: The ability of P. gingivalis to change the protein expression and the proliferative capacity of LDL may represent a crucial event in periodontitis-associated atherosclerosis.
Place, publisher, year, edition, pages
Institutionen för medicin och hälsa , 2008. Vol. 263, no 5, 558-571 p.
atherosclerosis, growth factors, infection, inflammation, lipoproteins
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-11870DOI: 10.1111/j.1365-2796.2007.01917.xOAI: oai:DiVA.org:liu-11870DiVA: diva2:18274
The definitive version is available at www.blackwell-synergy.com: Torbjörn Bengtsson, Helen Karlsson, Patrik Gunnarsson, Caroline Skoglund, Charlotte Elison, Per Leanderson and Mats Lindahl, The periodontal pathogen Porphyromonas gingivalis cleaves apoB-100 and increases the expression of apoM in LDL in whole blood leading to cell proliferation, 2008, Journal of Internal Medicine, (263), 5, 558-571. http://dx.doi.org/10.1111/j.1365-2796.2007.01917.x. Copyright: Blackwell Publishing www.blackwell-synergy.com2008-05-212008-05-212014-01-16Bibliographically approved