Adiponectin and smoking status: a systematic review.
OBJECTIVE
Smoking and adiponectin are individually associated with cardiometabolic pathologies. The present systematic review was carried out in order to summarize the association between the smoking status and circulating adiponectin levels.


METHODS
Original articles, restricted to epidemiological studies (by a cross-sectional, case-control and cohort study design) and intervention studies for adult humans, were screened for the years 1995-2010. All of the research group members then selected the eligible literature and assessed the articles in a structured systematic review manner.


RESULTS
There were 11 key studies, which included 9 articles with a cross-sectional design and 2 articles with an intervention design. Most cross-sectional studies reported lower levels of adiponectin in current smokers than in non/never smokers and/or ex-smokers, while 2 studies reported a non-significant difference in adiponectin between male smokers and non-smokers. The two intervention studies, conducted in patients on 9-week bupropion treatment and 6-month non-pharmacological treatment, reported that smoking cessation increased the adiponectin levels.


CONCLUSIONS
This review suggests that there is a decreased adiponectin level in current smokers and this reduction can be reversed by quitting smoking. More studies are required to confirm the findings and elucidate the biological mechanisms underlying the association between the smoking status and adiponectin levels.
Department of Clinical Laboratory Medicine, Jichi Medical University, Tochigi, Japan. kazukotani@jichi.ac.jp
Kazuhiko
K
Kotani
Ayako
A
Hazama
Akiko
A
Hagimoto
Kumiko
K
Saika
Masako
M
Shigeta
Kota
K
Katanoda
Masakazu
M
Nakamura
D052242:Adiponectin / Q000378:metabolism / Q000627:therapeutic use*; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D012907:Smoking / Q000009:adverse effects*; D016540:Smoking Cessation; D014029:Tobacco Use Disorder / Q000188:drug therapy* / Q000209:etiology / Q000378:metabolism
D052242:Adiponectin