Objective To investigate the teaching effect of the PCMC-type (problem-originated clinical medical curriculum) pathology experiment course and clinical pathological conference (CPC) by using microscope digital system.Methods 384 undergraduates of second grade in clinical medicine major and imaging diagnosis major were chosen for the teaching reform project,all of whom were divided into experimental group (192) and control group (192),randomly,and they were taught by PCMC pathological experiment teaching and the traditional pathological experiment teaching separately.After the curriculum,statistic analysis of test score was used to analyze the teaching effect.SPSS 13.0 software diagram method was used to perform Levene variance analysis and t test to the achievement of two groups of students and the students' ability of self evaluation was investigated through questionnaire.Results The average score of the students in the experimental group (86.16 ± 3.28) in the theory exam was significantly higher than that of control group (75.63 ± 2.24) (P=0.000).And the average score of the students in the experimental group in experiment (27.10 ± 0.61) was significantly higher than that in control group (19.87 ± 0.25) (P=0.000).The questionnaire showed that compared with control group,the comprehensive ability of the students in the experimental group was obviously enhanced.Conclusion The PCMC pathology teaching is beneficial to improving the students' ability of linking theory with practice and enhancing their ability to analyze and solve problems,and obviously stimulate their interest in learning.It is worth promoting.

Insulin resistance (IR) is a complex metabolic disorder related to several diseases including type 2 diabetes (T2DM), hypertension and dyslipidemia. These diseases are all independent risk factors for cardiovascular disease. Lipid metabolism disorder has toxic effects on cells and may cause or aggravate IR in performance of elevated plasma levels of triglyceride (TG) and free fatty acids (FFA), the last one is an independent risk factor for IR. It has been clear that FFA may induce IR by endoplasmic reticulum (ER) stress, oxidative stress, apoptosis and inflammation, although the specific mechanisms remained unknown. The present paper summarizes the related molecules involved in the pathogenic process of IR and its mechanism, might provide a theoretical basis for the molecular mechanism of IR caused by FFA, and therapeutic reference for clinical treatment of IR and prevention of T2DM.