Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 108, Issue 7, Pages 2867-2872Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1019270108
Keywords
innate immunity; bacteria clearance; Akt pathway
Categories
Funding
- National Institute of Dental and Craniofacial Research [DE15989]
Ask authors/readers for more resources
Our previous data have linked obesity with immune dysfunction. It is known that physical exercise with dietary control has beneficial effects on immune function and the comorbidities of obesity. However, the mechanisms underlying the improvement of immune function in obesity after physical exercise with dietary control remain unknown. Here we show that moderate daily exercise with dietary control restores the impaired cytokine responses in diet-induced obese (DIO) mice and improves the resolution of Porphyromonas gingivalis-induced periodontitis. This restoration of immune responses is related to the reduction of circulating free fatty acids (FFAs) and TNF. Both FFAs and TNF induce an Akt inhibitor, carboxyl-terminal modulator protein (CTMP). The expression of CTMP is also observed increased in bone marrow-derived macrophages (BMM Phi) from DIO mice and restored after moderate daily exercise with dietary control. Toll-like receptor 2 (TLR2), which increases CTMP induction by FFAs, is inhibited in BMM Phi from DIO mice or after either FFA or TNF treatment, but unexpectedly is not restored by moderate daily exercise with dietary control. Furthermore, BMM Phi from DIO mice display reduced histone H3 (Lys-9) acetylation and NF-kappa B recruitment to TNF, IL-10, and TLR2 promoters after P. gingivalis infection. However, moderate daily exercise with dietary control restores these defects at promoters for TNF and IL-10, but not for TLR2. Thus, metabolizing FFAs and TNF by moderate daily exercise with dietary control improves innate immune responses to infection in DIO mice via restoration of CTMP and chromatin modification.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available