Objective To identify the rale of NKX2-5 gene in cardiomyocyte differentiation and its mechanism.Methods P19 cells were divided into transfected and non-transfected groups.In the transfected group,P19 cells were with stable expression of NKX2-5 gene.The P19 cells were cultured in suspension for 4 days,and the formed aggregates were transferred to Petri dish for adherent culture.On days 4,8,12,and 16 of the adherent culture,the expressions of ct-saicomeric actin(α-SA)and cardiac troponin T(cTnT)were detected with double-labeling immunofluorescence and Western blot.The ultrastruetural changes were observed on day 16.Results In the transfected group,no expression of α-SA and cTnT was found on day 4,and the expression of these 2 proteins or co-expression existed on days 8,12,and 16.There were early cell junction and myofilament-like structure in the cytoplasm of some cells in the transfected group.In the non-transfected group,these 2 proteins were negative,and no differentiated cell was found.Conclusion Stable expression of NKX2-5 gene can induce cardiomyocyte differentiation from P19 cells,but the P19 cells with stable expression of JVKX2-5 gene is not suitable to be an in vitro model of cardiac development.

Objective To investigate the iodine nutrition level of the vulnerable population in the high risk region of iodine deficiency disorders for providing a scientific basis for the development of effective preventive measures in Qinghai province. Methods The non-iodized salt coverage rate ＞ 5％ of Delingha city, the coverage rate of iodized salt and the rate of qualified iodized salt ≤80％ of Jiuzhi, Wulan, Nangqian, Zaduo, Geermu,Yushu, Gande, Chengduo, and Dulan counties(cities), the median of urinary iodine ＜ 100 μg/L of Huangyuan county of 11 areas were chosen as monitoring area in 2009. Five townships(towns) were selected by their location of east, west, south, north and center in each county (city), and one school was selected in each township (town),and 60 household salt samples were collected in each school, and quantitatively determined by direct titration of iodine(GB/T 13025.7-1999). Three townships(towns) were selected in each county(city), and two schools were selected in each township(town). The content of urinary iodine of 40 children aged 8 - 10 and 20 women of childbearing age aged 18 - 40 was analyzed by As3+-Ce4+ catalytic spectrophotometry (WS/T 107-2006). ResultsThree thousand two hundred and sixty-one edible salt samples were tested. The coverage rate of iodized salt was 79.88％.The iodized salt qualification rate was 95.16％. The qualified iodized salt consumption rate was 76.02％. The noniodized salt coverage rate was 20.12％. In Nangqian, Zaduo, Yushu and Geermu counties(cities), the non-iodized salt coverage rate was 88.89％, 45.05％, 43.00％ and 12.67％, respectively. The median of urine iodine of 2536 children aged 8 - 10 was 155.8 μg/L, with ≤50 μg/L about 13.6％ (346/2536), ＞ 100 μg/L about 67.5％(1711/2536), and it was 75.1, 94.6 μg/L in Nangqian and Zaduo counties, respectively. The median of urine iodine of 665 women of childbearing age was 129.7 μg/L, with ≤50 μg/L about 22.7％(151/665), ＞ 100 μg/L about 59.2％(394/665), and it was 21.0, 54.7, 72.7 μg/L in Zaduo, Nangqian and Chengduo counties, respectively.Conclusions Insufficient intake of iodine exits in children and women of childbearing age in high risk region of iodine deficiency disorders in Qinghai province, which should be corrected as soon as possible.

Objective To master iodine nutritional status of people after universal salt iodization in Xining that reached the stage goal of elimination iodine deficiency disorders. Methods In the 7 counties investigated of Xining in 2009, 5 towns were randomly selected in each county, and one school was randomly selected in each town, 80 children aged 8 to 10 were randomly selected in each school, and goiter were examined, urinary iodine and salt iodine were tested. Thyroid gland goiter of children was detected by thyroid palpation, children's urinary iodine was tested by As( Ⅲ )-Ce4+ catalytic spectrophotometry, and salt iodine was tested by direct titration. Results A total of 2919 children aged 8 to 10 were examined, 31 goiter was detected, goiter rate was 1.06%(31/2919).One thousand and seventy-eight urine samples were detected, urinary iodine median was 205.3 μg/L, that lower than 20 μg/L accounted for 1.9% (20/1078), lower than 50 μg/L accounted for 4.5%(48/1078). Two thousand and seventy-nine salt samples were detected, median of salt iodine was 32.80 mg/kg, the rate of non-iodized salt was 0.87%(18/2079), the coverage rate of iodized salt was 99.13%(2061/2079), the qualified rate of iodized salt was 98.64% (2033/2061), the consumption rate of qualified iodized salt was 97.79% (2033/2079). Conclusions Prevention and control of iodine deficiency disorders has achieved remarkable results in Xining city, all indicators have reached the national standard to eliminate iodine deficiency disorders.

OBJECTIVETo study the influence of cervical settling method on marginal accuracy of wax patters.

METHODS24 wax patterns were made on the standard cast specimens and round capsules of which twelve patters were made with the method of cervical settling (experiment group), twelve patters were made with the method of wax dripping (control group). Marginal accuracy of patterns were measured before sublation, sublation half an hour and twenty-four hours.

RESULTSThe results revealed that marginal accuracy had significant difference between the cervical settling methods and wax dripping methods (P < 0.05). There was significant difference between the cervical settling methods measured after half an hour and twenty-four hours (P < 0.01). There was also significant difference between the wax dripping methods measured after half an hour and twenty-four hours (P < 0.01).

CONCLUSIONWax patterns with the method of cervical settling can improve marginal accuracy of patterns. The marginal accuracy of wax patters are influenced by the existing time.

Dental Casting Technique ; Dental Marginal Adaptation

OBJECTIVETo investigate the association of HLA class I and II alleles with generalized vitiligo in ethnic Han Chinese in north China.

METHODSBy employing polymerase chain reaction sequence-specific primer (PCR-SSP) procedure 34 generalized vitiligo patients in north China were studied for HLA I and II alleles and were compared with 102 healthy controls.

RESULTSThe allelic frequencies of HLA-A*30, Cw*06, DRB1*07, and DQB1*0201 were increased significantly in generalized vitiligo and especially in the patients without family history compared with the controls.

CONCLUSIONThese alleles positively associated with generalized vitiligo in Chinese Han patients in north China, might provide clues to reveal the susceptibility gene(s) of vitiligo in Chinese and as well as the immunnogenetic mechanisms of disease.

Adult ; Aged ; Aged, 80 and over ; Alleles ; Asian Continental Ancestry Group ; genetics ; China ; Female ; Gene Frequency ; Genes, MHC Class I ; genetics ; Genes, MHC Class II ; genetics ; Genotype ; Humans ; Male ; Middle Aged ; Vitiligo ; ethnology ; genetics

OBJECTIVETo understand the pollution rates of vibrio cholera (V. cholera) in different seafood, aquatic products and their circulatory processes, so as to help making measures for cholera control and prevention.

METHODSDifferent seafood, aquatic products and breed water specimen collected from 12 provinces of China were tested from July to September in 2005.

RESULTA total of 12 104 samples of seafood and aquatic products were tested and the average pollution rate of vibrio cholera was 0.52%. The positive isolate rate of turtle sample (1.72%) was the highest among all samples. The second higher isolated rate was 1.14% in water specimen of turtle breed pool. The positive rate of bullfrog was 0.50%. The percentage of toxin strains was 47.54% and 79.31% of them were isolated from turtle and water samples of turtle breed pool. The important sector of the pollution of vibrio cholera was in turtle breed pool (2.38%).

CONCLUSIONThe average pollution rate of vibrio cholera in seafood and aquatic products in 12 provinces of China was low. It should be very necessary to supervise the sanitation in turtle breed for controlling and preventing the vibrio cholera.

Animals ; China ; Female ; Fishes ; microbiology ; Food Contamination ; analysis ; prevention & control ; statistics & numerical data ; Male ; Seafood ; microbiology ; Seawater ; analysis ; Turtles ; microbiology ; Vibrio cholerae ; isolation & purification

OBJECTIVETo find a procedure for facial rejuvenation which is simple, safe with lasting aesthetic results based on facial anatomic study.

METHODSAnatomy study was performed on 12 sides from 6 head specimens. Observe the range and thickness of fat lateral to the nasolabial grooves. Observed the location of the skin retaining ligaments and reappraised their functions combining with clinical observations.

RESULTSSkin and subcutis and SMAS (including mimic muscles) become slackening with aging, but the loosening degrees are different, especially in the region lateral to the nasolabial groove. So they should be handled respectively. The fat lateral to the nasolabial groove is thick and is mobile with aging . So the subcutaneous detachment need not beyond the anterior border of the masseter. In the past two years, we performed rhytidectomy on 100 patients by limited subcutaneous detachment and SMAS double-plication. Satisfactory results were obtained. There are no serious complications observed.

CONCLUSIONSRhytidectomy by limited subcutaneous detachment and SMAS double-plication is a simple and safe procedure with lasting aesthetic results.

Face ; anatomy & histology ; Head ; anatomy & histology ; Humans ; Male ; Middle Aged ; Neck ; anatomy & histology ; Rhytidoplasty ; methods

OBJECTIVEAdhesive or too highly located folds upper eyelid and even blepharoptosis are common complications of double eyelid operation. To correct such deformities.

METHODWe shifted down the double eyelid line, removed adhesion thoroughly, relieved orbital fat and restarted the volume with infraorbicularis oculi fat flap.

RESULTWe had treated 32 case in past two years. The results were satisfying.

CONCLUSIONThe method are acted easy and gained fine result, so behaving to extend application.

Adipose Tissue ; transplantation ; Adult ; Blepharoplasty ; methods ; Eye Abnormalities ; etiology ; surgery ; Eyelids ; abnormalities ; pathology ; Female ; Humans ; Oculomotor Muscles ; surgery ; Postoperative Complications ; surgery ; Tissue Adhesions ; Young Adult

OBJECTIVETo investigate the effects of effective components extracted from medicines compatibility on ischemic myocardial remodeling.

METHODThe animal models of ischemic myocardial remodeling was copied by ligating the left anterior descending branch of coronary artery in rat. And then decoction and effective components extracted from the same medicines were administrated to rats. The heart function was detected by ultrasound diagnostic apparatus and the heart morphology was examined by Hematoxylin and Eosin, picrosirius staining respectively on the 3rd and 56rd day.

RESULTBoth concentrated decoction and effective components compatibility showed good restrained effects on ventricle malignant remodeling, such as improved heart function, reduced the area of myocardial infarction, lowered heart index, mitigated the fibrosis level and decreased apoptosis cell numbers in infarction and non-infarction areas. The difference were statistically significant when compared with the control group (P < 0.01, P < 0.05), and effective components treated group had better effects than concentrated decoction group (P < 0.05). Concentrated decoction group showed little effects on the 3rd day, while effective components group showed significant effect (P < 0.05).

CONCLUSIONEffective components compatibility has better effects on inhibiting the process of ischemic myocardial remodeling than concentrated decoction. Effective components compatibility has better effects on ventricle malignant remodeling by eliminating the interfrence non-pharmacodynamic elements of the medicine.

Animals ; Apoptosis ; drug effects ; Collagen ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Heart ; physiopathology ; Ischemia ; drug therapy ; metabolism ; physiopathology ; Male ; Myocytes, Cardiac ; drug effects ; pathology ; Rats ; Ventricular Remodeling ; drug effects