Serum leptin, resistin, and visfatin were significantly upregulated in male smokers.
Nicotine treatment increased leptin, resistin, and visfatin secretion in 3T3-L1 adipocytes.
The resistin and visfatin secretion was reduced by KATP channel inhibitor, but leptin secretion was not changed.
Nicotine might influence secretion of adipokines through KATP channel.