ABSTRACT
Objective Smoking can induce and aggravate obstructive sleep apnea-hypopnea synddrome (OSAHS), but there are few reports on its influence on insulin resistance of OSAHS patients. The article aimed to discuss the influence of smoking on insulin resistance in male patients with OSAHS.Methods A total of 141 OSAHS patients were divided into smoking group (n=104) and non-smoking group (n=37) according to smoking history. The smoking group were subdivided into two subgroups: ≥600 cigarettes/year and < 600 cigarettes/year according to smoking index. General clinical data of all patients were collected,while night sleeping data were gained by PSG overnight sleep monitoring. Fasting insulin(FINS), fasting blood glucose (FBG), concentration of serum C-reactive protein (CRP), tumor necrosis factor-alpha (TNF-α), interletkin-6 (IL-6), lipidperoxide (LPO) and activity of superoxide dismutase (SOD), glutathione peroxides (GSH-PX) were detected on all patients. Insulin resistance was evaluated by measuring HOMA-IR and FINS.Results Compared with non-smoking group, the patients in smoking group had a longer lack of oxygen time, lower oxygen saturation, higher CRP, TNF-alpha, IL-6 , LPO levels and lower SOD, GSH-PX activity. Significant differences were found in FBG, FINS, HOMA-IR and IR incidence between 2 subgroups(P<0.05), and the indexes of these 2 subgroups were both higher than those of non-smoking gorup, representing statistical significance(P<0.05).Conclusion Smoking is likely to be one of the important factors that lead to insulin resistance in male OSAHS patients. Oxidative stress, inflammation, hypoxia may be its influencing factors.