Brown adipose tissue (BAT) is important for regulating body weight. Environmental temperature influences BAT activation. Activated BAT is identifiable using F 18 -fluorodeoxyglucose positron emission tomography/computed tomography (F 18 -FDG PET/CT). F 18 -FDG PET/CT scans done between June 2005 and May 2009 in our institution in tropical southern Taiwan and BAT studies from PubMed (2002-2011) were reviewed, and the average outdoor temperatures during the study periods were obtained. A simple linear regression was used to analyze the association between the prevalence of activated BAT (P) and the average outdoor temperature (T). The review analysis for 9 BAT studies (n = 16, 765) showed a significant negative correlation (r = - 0.741, P = 0.022) between the prevalence of activated BAT and the average outdoor temperature. The equation of the regression line is P () = 6.99 - 0.20 T (C°). The prevalence of activated BAT decreased by 1 for each 5 C°increase in average outdoor temperature. In a neutral ambient temperature, the prevalence of activated BAT is low and especially rare in the tropics. There is a significant linear negative correlation between the prevalence of activated BAT and the average outdoor temperature.
All Science Journal Classification (ASJC) codes
- Biochemistry, Genetics and Molecular Biology(all)
- Environmental Science(all)