IADR/AADR publish study on obesity link to periodontitis

October 31, 2011

Alexandria, Va., USA - In a study titled "MicroRNA Modulation in Obesity and Periodontitis," lead author Romina Perri, University of North Carolina School of Dentistry, Oral Health Institute, conducted a pilot investigation to determine whether obesity or periodontal disease modified microRNA expression and whether there was any potential interaction between obesity and periodontitis that could involve microRNA modulation. This study is published in the Journal of Dental Research, the official publication of the International and American Associations for Dental Research (IADR/AADR).

In this investigation, total RNA was extracted from gingival biopsy samples collected from 20 patients in 4 groups (5 non-obese [BMI < 30kg/m2] participants with a healthy periodontium, 5 non-obese participants with periodontitis, 5 obese [BMI > 30kg/m2] participants with a healthy periodontium and 5 obese participants with periodontitis).

Two microRNA species (miR-18a,miR-30e) were up-regulated among obese individuals with a healthy periodontium. Two microRNA species (miR-30e,miR-106b) were up-regulated in non-obese subjects with periodontal disease and in the presence of periodontal disease and obesity, nine microRNAs were significantly up-regulated (miR-15a,miR-18a,miR-22,miR-30d,miR-30e,miR-103,miR-106b, miR-130a,miR-142-3p,miR-185 and miR-210). The authors conclude that the data are consistent with the concept that miRNA that are induced by chronic nutritional stress leading to obesity may also non-parsimoniously modulate inflammatory pathways within periodontal tissues and affect disease expression.

"The expression of specific microRNA species in obesity provides new insight into possible mechanisms of how risk factors might modify periodontal inflammation and may represent novel therapeutic targets," said JDR Editor-in-Chief William Giannobile.

A perspective article titled "Obesity, Inflammation and Oral Infections: are microRNAs the Missing Link?" was co-authored by Francesco D'Aiuto and Jean Suvan, University College London Eastman Dental Institute. In it, the authors suggest that these data could represent a mechanistic breakthrough in our understanding of the modulatory effects of obesity on periodontal tissue destruction, but caution reproducibility of these findings is needed in larger and well-characterized cohorts.
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Visit http://jdr.sagepub.com/content/early/recent for links to the complete articles or contact Ingrid L. Thomas at ithomas@iadr.org to request the PDFs.

About the Journal of Dental Research

The IADR/AADR Journal of Dental Research is a multidisciplinary journal dedicated to the dissemination of new knowledge in all sciences relevant to dentistry and the oral cavity and associated structures in health and disease. At .02261, the JDR holds the highest Eigenfactor Score of all dental journals publishing original research and continues to be ranked number one in Article Influence Score, reflecting the influential nature of the Journal's content.

About the International Association for Dental Research

The International Association for Dental Research (IADR) is a nonprofit organization with more than 11,000 individual members worldwide, dedicated to: (1) advancing research and increasing knowledge to improve oral health, (2) supporting the oral health research community, and (3) facilitating the communication and application of research findings for the improvement of oral health worldwide. To learn more, visit www.iadr.org. The American Association for Dental Research (AADR) is the largest Division of IADR, with nearly 4,000 members in the United States. To learn more, visit www.aadronline.org.

International & American Associations for Dental Research

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