2009
DOI: 10.2337/db09-0833
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Brown Adipose Tissue and Seasonal Variation in Humans

Abstract: OBJECTIVEBrown adipose tissue (BAT) is present in adult humans where it may be important in the prevention of obesity, although the main factors regulating its abundance are not well established. BAT demonstrates seasonal variation relating to ambient temperature and photoperiod in mammals. The objective of our study was therefore to determine whether seasonal variation in BAT activity in humans was more closely related to the prevailing photoperiod or temperature.RESEARCH DESIGN AND METHODSWe studied 3,614 co… Show more

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Cited by 232 publications
(220 citation statements)
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“…The detectability of BAT by [ 18 F]fluorodeoxyglucose-PET-CT imaging at room temperature follows a circannual cycle, both in the northern and southern hemispheres (31)(32)(33), with low detectability of BAT in summer (i.e., short day) compared with winter (i.e., long day). Although differences in outside temperature over the year would be a likely explanation for this phenomenon, the detectability of BAT showed a stronger correlation with day length than with outside temperature (31). Based on our present data, the daily light exposure may thus well explain the circannual cycle of BAT detectability.…”
Section: Discussionmentioning
confidence: 99%
“…The detectability of BAT by [ 18 F]fluorodeoxyglucose-PET-CT imaging at room temperature follows a circannual cycle, both in the northern and southern hemispheres (31)(32)(33), with low detectability of BAT in summer (i.e., short day) compared with winter (i.e., long day). Although differences in outside temperature over the year would be a likely explanation for this phenomenon, the detectability of BAT showed a stronger correlation with day length than with outside temperature (31). Based on our present data, the daily light exposure may thus well explain the circannual cycle of BAT detectability.…”
Section: Discussionmentioning
confidence: 99%
“…Body mass index (BMI) and body fat percentage is inversely related to BAT mass, and obese adult humans have low BAT mass, which increases following gastric banding surgery (57)(58)(59)(60). These findings have created significant interest in developing therapeutics that target BAT in humans for obesity therapy (27)(28)(29)(30)(31)(32).…”
Section: Discussionmentioning
confidence: 99%
“…A higher percentage of individuals, as we might expect based on this hypothesis, present BAT-positive PET-FDG in winter (62,63,67), even when am bient temperature is controlled (63). Another fascinating theory that helps to explain this difference is that photoperiod could also interfere with BAT recruitment (63).…”
Section: What Is the Real Prevalence Of Brown Adipose Tissue? Conceptmentioning
confidence: 76%
“…In Brazil, there are no published studies on this subject, but unpublished data suggests even lower levels. Table 2 highlights differences in BAT uptake in different populations, in ambient temperature and after cold exposure (12,13,14,23,30,38,(62)(63)(64)(65)(66)(67) What could the reason be for such differences considering similar protocols?…”
Section: What Is the Real Prevalence Of Brown Adipose Tissue? Conceptmentioning
confidence: 99%
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