Adiponectin ameliorates experimental periodontitis in diet-induced obesity mice.
Adiponectin is an adipokine that sensitizes the body to insulin. Low levels of adiponectin have been reported in obesity, diabetes and periodontitis. In this study we established experimental periodontitis in male adiponectin knockout and diet-induced obesity mice, a model of obesity and type 2 diabetes, and aimed at evaluating the therapeutic potential of adiponectin. We found that systemic adiponectin infusion reduced alveolar bone loss, osteoclast activity and infiltration of inflammatory cells in both periodontitis mouse models. Furthermore, adiponectin treatment decreased the levels of pro-inflammatory cytokines in white adipose tissue of diet-induced obesity mice with experimental periodontitis. Our in vitro studies also revealed that forkhead box O1, a key transcriptional regulator of energy metabolism, played an important role in the direct signaling of adiponectin in osteoclasts. Thus, adiponectin increased forkhead box O1 mRNA expression and its nuclear protein level in osteoclast-precursor cells undergoing differentiation. Inhibition of c-Jun N-terminal kinase signaling decreased nuclear protein levels of forkhead box O1. Furthermore, over-expression of forkhead box O1 inhibited osteoclastogenesis and led to decreased nuclear levels of nuclear factor of activated T cells c1. Taken together, this study suggests that systemic adiponectin application may constitute a potential intervention therapy to ameliorate type 2 diabetes-associated periodontitis. It also proposes that adiponectin inhibition of osteoclastogenesis involves forkhead box O1.
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America; Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Lan
L
Zhang
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America; Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Shu
S
Meng
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America.
Qisheng
Q
Tu
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America.
Liming
L
Yu
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America; Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Yin
Y
Tang
Periodontology and Implant Dentistry, New York University College of Dentistry, New York, New York, United States of America.
Michel M
MM
Dard
Cancer Preventive Material Development Research Center (CPMDRC) and Institute, College of Oriental Medicine, Kyung Hee University, Dongdaemun-gu, Seoul, Korea.
Sung-Hoon
SH
Kim
Department of Sciences, Wentworth Institute of Technology, Boston, Massachusetts, United States of America.
Paloma
P
Valverde
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Xuedong
X
Zhou
Division of Oral Biology, Tufts University School of Dental Medicine, Boston, Massachusetts, United States of America; Department of Anatomy and Cell Biology, Tufts University School of Medicine, Sackler School of Graduate Biomedical Sciences, Boston, Massachusetts, United States of America.
Jake
J
Chen
D052242:Adiponectin / Q000494:pharmacology / Q000627:therapeutic use*; D000818:Animals; D002460:Cell Line; D016207:Cytokines / Q000097:blood; D059305:Diet, High-Fat / Q000009:adverse effects; D000071161:Forkhead Box Protein O1; D051858:Forkhead Transcription Factors / Q000235:genetics / Q000378:metabolism; D048031:JNK Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors; D008297:Male; D051379:Mice; D009765:Obesity / Q000150:complications* / Q000209:etiology; D010010:Osteoclasts / Q000187:drug effects / Q000378:metabolism; D010012:Osteogenesis; D010518:Periodontitis / Q000150:complications / Q000188:drug therapy* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
D052242:Adiponectin; D016207:Cytokines; D000071161:Forkhead Box Protein O1; D051858:Forkhead Transcription Factors; C467200:Foxo1 protein, mouse; D012333:RNA, Messenger; D048031:JNK Mitogen-Activated Protein Kinases