ABSTRACT
Both the increasing prevalence and growing burden of diabetes mellitus have caused global public health concerns.With the development of bio-psycho-social medical model,the impact of psychosocial factors on diabetes has attracted more attentions among the researchers.This paper summarizes findings from epidemiological studies that focusing on the association between diabetes and related psychosocial risk factors.Foreign studies have shown that psychological factors are closely related to diabetes,but the conclusions on social factors are inconsistent.Domestic studies have only targeted on small-sample-sized and cross-sectional studies.More longitudinal research is needed to confirm the impact of psychosocial factors on the risk of diabetes.
ABSTRACT
Both the increasing prevalence and growing burden of diabetes mellitus have caused global public health concerns.With the development of bio-psycho-social medical model,the impact of psychosocial factors on diabetes has attracted more attentions among the researchers.This paper summarizes findings from epidemiological studies that focusing on the association between diabetes and related psychosocial risk factors.Foreign studies have shown that psychological factors are closely related to diabetes,but the conclusions on social factors are inconsistent.Domestic studies have only targeted on small-sample-sized and cross-sectional studies.More longitudinal research is needed to confirm the impact of psychosocial factors on the risk of diabetes.
ABSTRACT
This study was aimed to establish an optimized method to observe the synchronous changes of vascular tension and intracellular Casignal in the third-order branches of mesenteric arteries (sMA, diameter: 100-300 μm). The vascular tension and intracellular Casignal changes in response to potassium chloride (KCl), endothelin-1 (ET-1) and Gdwere detected using confocal wire myograph system and confocal laser scanning microscopy imaging technique, respectively. The experimental results were analyzed to explore the optimal experimental conditions. The results showed that KCl caused contraction in sMA significantly, and the intracellular Calevel of vascular smooth muscle cells (VSMCs) was also increased under 20× and 40× objective lens. Compared with those under the 40× objective lens, the Casignal change was larger and the fluorescence value was more stable under the 20× objective lens, whereas the Casignal change was not obvious under the 10× objective lens. ET-1 (1-10 nmol/L) caused concentration dependent contraction in sMA significantly, and the intracellular Casignal of VSMCs was also enhanced in a concentration dependent manner. Additionally, Gdsignificantly reduced the contraction of sMA and the intracellular Casignal of VSMCs caused by ET-1. The results suggest that the intracellular Casignal of VSMCs changes with vascular contraction or relaxation caused by the agonists or antagonists of Cachannels. We successfully recorded both changes synchronously using confocal wire myograph system and confocal laser scanning microscopy imaging technique at the same time. Based on the analysis of the experimental results, we concluded that 20× objective lens provides the best experimental condition. Compared to combination of vascular tone detection method and real-time cellular fluorescence imaging technique, the present synchronous method is convenient and helpful to reduce experimental error.