[Effect of Electroacupuncture on Learning-memory Ability in Rats with Hypoxic-ischemic Encephalopathy].

OBJECTIVE: To observe the effect of electroacupuncture (EA) on changes of learning-memory ability, psychomotor coordination and anxiety-like behavior of cerebral hypoxic-ischemia (CHI) young rats, so as to explore its protective effect on neurons under hypoxic-ischemic conditions. METHODS: SD rats (aged 7 days) were randomly divided into sham operation (sham, n=12), model (n=11), and EA groups (n=12). In addition, 6 young rats in each group were used for observing the number of dendritic spines after Golgi staining. The CHI model was established by ligation of the left common carotid artery combined with hypoxia in a closed transparent vessel. EA was applied to "Baihui" (GV 20)and "Dazhui" (GV 14) for 20 min, once every other day, for 28 days. The rats' behavior changes were assessed by using rotarod performance (for psychomotor coordination), elevated plus maze (anxiety-like behavior) tests and Morris water maze (learning-memory ability) tests, separately. RESULTS: After modeling, the average escape latency and average escape distance of location navigation test within 70 seconds were significantly increased (P<0.05), and the average times and average duration of safe-platform quadrant crossing of spacial probing test were markedly reduced relevant to the sham group (P<0.05). After EA treatment, CHI-induced increases of escape latency and escape distance, and the decreased times and duration of platform quadrant crossing were significantly reversed (P<0.05). No significant differences were found among the three groups in the falling latency of rotarod performance test, and in the time of opening and closing arms of elevated plus maze tests (P>0.05). The density of dendritic spines was significantly lo-wer in the model group than in the sham group (P <0.05), and notably higher in the EA group than in the model group (P<0.05). CONCLUSION: EA can improve the learning-memory ability of CHI young rats, which may be related to its effect in protecting the dendritic spines of CA 1 region of hippocampus from injury.

[Cross-sectional investigation of prevalence of type 2 diabetes in Shanghai].

OBJECTIVE: To investigate the prevalence of type 2 diabetes and impaired glucose regulation among the permanent urban and rural inhabitants in Shanghai. METHODS: Questionnaire survey, physical examination, and laboratory testing were conducted among 14401 urban and rural inhabitants aged 15 - 74 in Shanghai selected by multistage cluster random sampling. The data about the prevalence of type 2 diabetes and impaired glucose regulation were collected and analyzed. RESULTS: The respondent rate of this investigation was 80.5% (11,589/14,401). The prevalence rates of type 2 diabetes, impaired glucose tolerance (IGT) and impaired fasting glucose (IFG) were 8.6% (1000/11,589), 6.9% (802/11,589), and 1.0% (120/11,589) respectively (the standardized rates were 6.2%, 5.1% and 0.8%). The prevalence rates of type 2 diabetes, IGT, and IFG were significantly higher in those with overweight, obesity, central obesity, and hypertension. The prevalence rates of type 2 diabetes, IGT, and IFG in men were 8.9% (412/4621), 6.4% (296/4621), and 1.0% (47/4621) respectively, all not significantly different from those of the women, i.e. e., 8.4% (588/6968), 7.3% (506/6968), and 1.0% (73/6968) respectively (all P > 0.05). The prevalence rates of type 2 diabetes and IGT in the urban area were 11.2% (730/6500) and 6.4% (419/6500) respectively, both significantly higher than those in the rural area, i.e., 5.3% (270/5089) and 7.5% (383/5089) respectively (both P < 0.05). The prevalence rate of IFG in the urban area was 1.2% (77/6500), not significantly different from that in the rural area (0.8%, 43/5039, P > 0.05). The prevalence of type 2 diabetes, IGT, and IFG increased apparently with age, body mass index, waist hip ratio, and waist circumference. The ratios of undiagnosed type 2 diabetes in the urban area and rural area were 39.6% (289/730) and 69.3% (187/270) respectively (chi(2) = 74.07, P < 0.01). CONCLUSION: The prevalence rate of type 2 diabetes in Shanghai is higher than the mean national level and shows an increasing tendency. Screening of type 2 diabetes in rich rural areas should be emphasized.