Objective To provide scientific basis for the investigation, prevention,control and administration of house decoration noise Methods The equivalent noise levels (Leq),and the levels of noise dose (D L) in decorated houses,next door houses and outdoor environment were measured during different periods such as morning,noon,afternoon and evening in one day, as well as the health effects of noise in 3 residential quarters were investigated Results The Leqs levels during per 10 minutes were 79 6～104 7 dB(A) in decorated house The individuals exposure D L of decoration workers were 90%～180% The Leqs during per 20 minutes were 70 9～76 4 dB(A) in next door houses and 63 4～76 5dB(A) in the neiboaring residential building and office building 6～45 meters far from the decoration noise sources The annoyance rate among 149 residents was high and reached 89 8% The mental labourers revealed significantly higher annoyance rate compared with that of physical labourers Conclusion The health effects of decoration noise on occupational individuals and residents shouldnt be ignored

BACKGROUND:Tissue engineered skin has been used to repair defect skin, but it is not as good as to completely replace permanent skin. OBJECTIVE: To explore the biological characteristics and clinical application of various types of tissue engineered skin. METHODS: Pubmed data (1990-01/2005-12) was retrieved by computer with the key words of "tissue-engineered skin". CNKI database (2002-01/2007-12) was retrieved with the same key words. RESULTS AND CONCLUSION: Totally 226 literatures were primarily selected. After reading titles and Abstracts, studies addressing irrelative objective or repetitive content were excluded, and 11 literatures were included. The aim of skin tissue engineering is to create skin substitute that close to human.skin in histology and functional characteristics. There were many mature tissue engineered skin in clinic, and various artificial skins were developed. Their structure was similar to human, but only had skin barrier function and lack of skin appendages, so they did not have complete skin function, and did not reach skin reestablishment. Ideal skin substitute should process cuticular layer and dermial layer. The dermial layer can reach rapid vascularization and nerve redistribution, can promote physiological wound repair. The cuticular layer can rapidly obtain full barrier and protection function, which can be fully integration with wound surface. A good dermial carrier has good histocompatibility, and a certain physical and chemical properties, such as strength, scratchability, elasticity, gas permeation, water vapor permeability. These can provide a good adherence between dermis and wound surface, offer an ideal fiber stent for cell growth, and finally promote autologous skin growth. Tissue engineered skin has good prospect, but there are many problems that should be solved in biocompatibility and skin function reestablishment.

OBJECTIVETo determine the mid-term effects of cutting balloon angioplasty (CBA) on in-stent restenosis.

METHODSA total of 69 patients with in-stent restenosis were divided into 2 groups randomly: cutting balloon angioplasty and plain old balloon angioplasty. The mechanisms of restenosis and dilation results were determined by quantitative coronary angiography and intravascular ultrasound. Follow-up was performed.

RESULTSThe procedural success rate was 100% without death and acute closure. One patient experienced dissection at the distal end of the stent and needed another stent. The mean follow-up period was 6.7 +/- 2.3 months. The final re-restenosis rate was 15% and 18% at 3 months and 6 months respectively, markedly lower than after plain old balloon angioplasty (38% and 43%). Acute gain by intravascular ultrasound (IVUS) was 1.72 +/- 0.52 mm after cutting balloon angioplasty, higher than 1.15 +/- 0.54 mm after plain old balloon angioplasty. The lumen diameter late loss in the cutting balloon group was 0.26 +/- 0.05 mm and 0.38 +/- 0.06 mm at 3 months and 6 months respectively, significantly lower than for those in conventional balloon group (0.78 +/- 0.19 mm and 0.89 +/- 0.16 mm, respectively, P < 0.001). As shown by IVUS, the main mechanism of cutting balloon angioplasty was marked reduction of plaque area without significant increase of vessel area (less vessel trauma).

CONCLUSIONCutting balloon angioplasty is feasible and effective for the treatment of in-stent restenosis with less vessel trauma.

Aged ; Angioplasty, Balloon ; methods ; Coronary Angiography ; Coronary Restenosis ; therapy ; Coronary Vessels ; pathology ; physiopathology ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Stents ; Time Factors ; Treatment Outcome

A fluorescent microsphere-based immunochromatographic strip test (FICT) was developed for the rapid, sensitive, and quantitative detection of porcine reproductive and respiratory syndrome virus (PRRSV) antibodies at the pen-side. The assay was based on the formation of a sandwich immune-complex (anti-pig IgG-PRRSV antibodies-NSP7/N), which was validated by a comparison with IDEXX-ELISA using 3325 clinical specimens. The diagnostic specificity, sensitivity, and accuracy of FICT were 97.28, 93.41, and 94.95%, respectively. FICT showed a good correlation with the virus neutralization assay. Overall, a promising pen-side diagnostic tool was developed for the rapid and quantitative detection of PRRSV antibodies within 15 min.

Objective:To investigate the correlation between serum uric acid level and non-alcoholic liver disease (NAFLD).Methods:A medical examination cohort of our hospital′s staff was constructed. From February 1, 2012 to January 29, 2013, a total of 3, 479 staff without NAFLD were selected as research subjects, and baseline data were collected through a questionnaire survey, physical examination, abdominal ultrasound examination, blood lipid, blood glucose, liver and kidney function, and other laboratory tests. From February 1, 2013 to December 31, 2018, the patients were followed up during the annual physical examination for six years. The serum uric acid level was used as the observation index and divided into four groups from A to D according to the quartile. With the occurrence of NAFLD as the outcome indicator; the four groups of uric acid as the observation indicator; and age, body mass index, hyperlipidemia, hyperglycemia, hypertension, creatinine, and alanine aminotrans ferase as confounding factors; four Cox regression analysis models were constructed to explore the relationship between groups of different blood uric acid levels and NAFLD. Stratified by gender, three Cox regression analysis models were constructed to investigate the relationship between blood uric acid level grouping and NAFLD between different genders.Results:The six-year cumulative incidence of NAFLD in groups A, B, C, and D was 1.2%, 3.1%, 4.9%, and 12%, respectively (χ 2=114.710, P<0.05). Among the female workers, the six-year cumulative incidence rates in groups A, B, C, and D were 1.0%, 2.9%, 4.1% and 10.9%, respectively (χ 2=71.241, P<0.05). The incidence risk of NAFLD in groups B, C, and D was 2.04 (1.01-4.11), 2.24 (1.13-4.44), and 3.89 (1.94-7.80) times that of group A, P<0.05, respectively. The incidence risk of NAFLD in groups B, C, and D was 2.21 (1.02-4.77), 2.39 (1.10-5.19), and 4.49 (1.99-10.15) times that of group A, all P<0.05, respectively. Conclusion:The risk of NAFLD increased with the increase of serum uric acid level, and this trend was mainly manifested in female employees.

Objective:To investigate the correlation between hyperhomocysteinemia (HCA) and hyperuricemia (HUA).Methods:A total of 8 465 individuals who received a medical examination at the Xiangya Hospital Health Management Center of Central South University were selected as research subjects from January to June 2018. The multi-factor binary Logic regression method was adopted and four different models. The ratio ( OR) and its 95% trusted interval ( CI) between Hhcy group and normal control group were analyzed. Results:Compared to the normal control group, the OR(95% CI) of the probability of HUA in the Hhcy population was 3.272 (95% CI: 2.839 to 3.771, P<0.001) without correcting other factors; After correcting the influence of age and gender, the OR (95% CI) of the Hhcy population with HUA probability was 2.111 (95% CI: 1.811-2.461, P<0.001); After correcting age, gender, Body Mass Index (BMI), blood pressure, fasting blood sugar, triglycerin, low-density lipoprotein, and high-density lipoprotein, the OR(95% CI) of the Hhcy population with HUA probability was 2.163 (95% CI: 1.845 to 2.535, P<0.001); After correcting age, sex, BMI, blood pressure, fasting blood sugar, triglycerin, low-density lipoprotein, high-density lipoprotein, drinking, smoking, exercise time, and exercise intensity, the OR (95% CI) of the Hhcy population had a HUA probability of 2.209(95% CI: 1.845 to 2.646, P<0.001). Conclusion:The cross-sectional study confirmed that Hhcy was positively correlated with HUA. Reducing homocysteine levels may be a new approach to the health management of HUA.

Objective:To investigate the correlation between serum uric acid level and hyperglycemia.Methods:A medical examination cohort of the staff of our hospital was constructed. From February 1 st, 2011, to December 31 st, 2011, 3 937 staff members without hyperglycemia were selected, and baseline data were collected through a questionnaire survey, physical examination, measurement of blood lipid and blood glucose, assessment of kidney function, and other laboratory tests. The subjects were followed up during the annual physical examination for 7 years, from January 1 st, 2012, to December 31 st, 2018. They were divided into four groups according to serum uric acid level: uric acid<360 μmol/L, 360≤uric acid<420 μmol/L, 420≤uric acid<480 μmol/L, and uric acid≥ 480 μmol/L. With the occurrence of hyperglycemia as the outcome indicator; uric acid level as the observation index; uric acid<360 μmol/L as the control group; and gender, age, body mass index, smoking, hypertension, dyslipidemia as confounding factors, Cox regression was performed before and after adjusting confounding factors to analyze the relationship between different uric acid levels and the incidence of hyperglycemia in the entire sample, in the male staff, and in the female staff. Results:The 7-year cumulative incidence of hyperglycemia in the four groups were 15.7%, 34.0%, 38.8%, and 43.8%, respectively ( Z=148.94, P<0.01). In the male staff, the 7-year cumulative incidence rates in the four groups were 23.4%, 29.9%, 34.7%, and 35.8%, respectively ( Z=11.17, P<0.01). In the female staff, the 7-year cumulative incidence rates in the four groups were 14.2%, 42.5%, 52.2%, and 65.0%, respectively ( Z=141.84, P<0.01. After adjusting for gender, age, body mass index, smoking, hypertension, and dyslipidemia, the risk of hyperglycemia in the 360≤uric acid<420 μmol/L, 420≤uric acid<480 μmol/L, and uric acid≥ 480 μmol/L groups were 1.73 (1.39-2.15), 1.86 (1.42-2.45), and 1.95 (1.34-2.85) times higher than that in the control group (all P<0.05). Among female staff, the risk of hyperglycemia in the 360≤uric acid<420 μmol/L, 420≤uric acid<480 μmol/L, and uric acid≥ 480 μmol/L groups were 2.18 (1.62-2.94), 3.41 (2.24-5.20), and 3.02 (1.69-5.40) times, respectively, and were also higher than those in the control group (all P<0.01). Conclusion:With the increase of serum uric acid level, the risk of hyperglycemia in medical staff increases, which is mainly manifested in female staff.

Objective To investigate the effects and mechanisms of icariin on changes in fear memory in post-traumatic stress disorder(PTSD)rats.Methods Thirty male SD rats were used to construct a rat model of single prolonged stress(SPS).The model rats were randomly divided into the SPS,icariin,and icariin + K252a(tyrosine kinase receptor B inhibitor)groups(n= 10 each;another 10 normal rats were used as the control group).The icariin and icariin + K252a groups were administered 20 mg/kg icariin by gavage once per day after SPS,while the control and SPS groups were administered the same dose of normal saline.K252a cells were injected into the lateral ventricles.After 2 weeks,anxiety,depression,and fear memory disorder in rats in each group were detected by the mine experiment,ele-vated cross maze experiment,and conditional fear test.The binding activity of icariin to brain-derived neurotrophic factor(BDNF)and the BDNF and TrkB expressions in the rat amygdala were detected by immunohistochemistry.The relative expressions of BDNF and TrkB pro-teins were detected by Western blotting.The expressions of postsynaptic density protein 95(PSD95)and synaptophysin(SYN)in the rat amygdala were detected using immunofluorescence.Results Icariin showed strong binding to BDNF.Compared with the control group,the times of entering the central area and the percentage of movement distance in the central area in the SPS group and the icariin+K252a group were significantly reduced.The open arm entry(OE)and arm opening time(OT)were significantly reduced,the freezing time and defecation times were significantly increased,and the expressions of the BDNF,TrkB,PSD95,and SYN proteins were significantly reduced(P<0.05).Compared with the SPS group,the icariin group rats had significantly increased times of entering the central area and percentages of movement distance in the central area,significantly increased OE and OT,significantly reduced the time of immobilization and defecation,and significantly increased the expressions of BDNF,TrkB,PSD95,and SYN proteins(P<0.05).Conclusion Icariin effectively alleviated the fear memory impairment induced by SPS in rats.This protective effect is related to BDNF/TrkB signaling pathway activation and upregulated PSD95 and SYN expression.

Objective:To investigate the relationship between waist circumference and hyperuricemia in occupational population in Changsha city.Methods:Based on a retrospective cohort design, a total of 1 197 employees from 70 organizations who received 4 or more years of continuous physical examinations in Xiangya hospital from January 1, 2014 to December 31, 2018 were included in this study. The physical examination data of the year 2014 were set as baseline data, while the data between January 1, 2015 and December 31, 2018 were used as follow-up data. According to interquartile range of the waist circumference, the subjects was divided into four groups: the first quartile ( Q1),<77 cm for men and <68 cm for women; the second quartile ( Q2), 77 cm ≤ and<82 cm for men, 68 cm ≤ and <73 cm for women; the third quartile ( Q3), 82 cm ≤ and <87 cm for men, 73 cm ≤and <78 cm for women; the fourth quartile ( Q4), ≥87 cm for men, ≥78 cm for women. Among them, Q1 was set as the control group, and Q2, Q3 and Q4 as the exposed groups. Three models were established for the total population, men and women, respectively. The confounding factors were not adjusted in model Ⅰ. The model Ⅱ was adjusted for age, gender and body mass index (the male or female population were not adjusted for sex). Confounders including age, gender, body mass index, hypertension, fasting glucose, blood creatinine, triacylglycerol, low-density lipoprotein cholesterol and high-density lipoprotein cholesterol were adjusted for model Ⅲ. Cox regression analysis was used to compare the hazard ratio ( HR), adjusted hazardratio (a HR) and their 95% CIs for the development of hyperuricemia in the subjects with different waist circumference over the 4 years. Results:Total of 1 197 subjects were followed-up for (2.05±1.18) years and 2 448 person-years. A total of 208 cases of hyperuricemia were identified in the total population during the 4 years (45 women/163 men), with a cumulative incidence of 17.4% (6.4% in women/33.3% in men) and an incidence density of 84.9/1 000 person-years (31.8/1 000 person-years in women, 157.6/1 000 person-years in men). And 626, 609, 629, and 584 person-years were followed-up in the 4 groups, respectively; with 15, 30, 59, and 104 cases of hyperuricemia occurred during 4 years, respectively. The cumulative incidence rates of hyperuricemia in the 4 yearswas 5.5%, 9.2%, 20.8% and 32.8%, respectively; and the incidence densities was 24.0/1 000 person-years, 49.3/1 000 person-years, 93.8/1 000 person-years and 178.1/1 000 person-years, respectively. Compared with that in the Q1 group, the risk of hyperuricemia was increased in the Q4 group, with a HR (95% CI) of 2.70 (1.81 to 4.04), P<0.05. After adjusted for confounding factors in the total population, the a HR (95% CI) of hyperuricemia was 2.12 (1.39 to 3.24), P<0.05. This risk remained when stratified by gender and adjusted for confounding factors. Compared with the Q1 group, the a HR (95% CI) of hyperuricemia in the Q4 group was 1.91 (1.18 to 3.09) for the male population and 2.93 (1.14 to 7.56) for the female population, respectively (both P<0.05). Conclusion:Among the occupational population, the risk of hyperuricemia increases with increase of waist circumference.

Objective:To investigate the correlation between hyperuricemia and hypertension in hospital employees.Methods:A cohort was constructed from staff participating health checkups at the Xiangya Hospital of Central South University, baseline health examinations and questionnaires were conducted from February 1, 2011, to January 29, 2012; 502 participants were excluded according to the nadir criteria, and 3 525 participants were followed-up from February 1, 2012, to December 31, 2018, according to the results of annual employee checkups. The participants were divided into the normal uric acid (3 232 cases) and hyperuricemia groups (293 cases) according to the baseline examination results. The presence of hyperuricemia was used as an observation index and occurrence of hypertension within 7 years was used as an outcome indicator. Age, sex, body mass index, creatinine, LDL cholesterol, triacylglycerol, HDL cholesterol, fasting glucose, marriage, education, job position, smoking, alcohol consumption, and exercise status were used as confounding factors to construct five Cox regression models and calculate their HR values, adjusted HR values, and 95% CI to analyze the relationship between hyperuricemia and the occurrence of hypertension in the overall population and female and male populations. Results:The follow-up of the study participants was conducted for a period of (6.19±1.25) years, with a total of 21 831 person-years of follow-up. The 7-year cumulative prevalence of hypertension was 16.5% in the total population, 12.5% in the female population, 30.1% in the male population, 14.1% in the normal uric acid group, and 42.0% in the hyperuricemia group. The prevalence density of hypertension was 26.6, 19.6, 53.8, and 22.4 per 1 000 person-years in the total, female, male, and normouricemic groups, respectively. Without adjusting for any confounding variables, the risk of hypertension was higher in the total population, female population, and male population in the hyperuricemia group than in the normal uric acid group [ HR=3.86, 5.69, 1.60, (95% CI: 3.17-4.72, 4.36-7.43, 1.18-2.16)] (all P<0.05); after gradually adjusting for confounders, this correlation was only manifested in the female population [adjusted HR=1.91 (95% CI: 1.08-3.36)] (all P<0.05), and the difference was not statistically significant in the male population ( P>0.05). Conclusion:Among female hospital employees, hyperuricemia is an independent risk factor for the development of hypertension.