Hydrogen sulfide suppresses H2O2-induced proliferation and migration of HepG2 cells through Wnt/ß-catenin signaling pathway.

Both H2S and H2O2 affect many cellular events, such as cell differentiation, cell proliferation and cell death. However, there is some controversy about the roles of H2S and H2O2, since the detailed mechanisms they are involved remain unclear. In this study, low concentration of H2O2 (40 µM) increased the viability of hepatocellular carcinoma cells HepG2, while both H2S and high concentration of H2O2 decreased the cell viability in a dose-dependent manner. Wound healing assay indicated that 40 µM H2O2 promoted migration of HepG2 cells, which was suppressed by exogenous H2S. Further analysis revealed that administration of exogenous H2S and H2O2 changed the redox status of Wnt3a in HepG2 cells. Altered expression of proteins including Cyclin D1, TCF-4, and MMP7, which are downstream of the Wnt3a/ß-catenin signaling pathway, were found after treatment with exogenous H2S and H2O2. Compared with H2S, low concentration of H2O2 showed opposite effects on these protein expression levels in HepG2 cells. These results suggest that H2S suppressed H2O2-induced proliferation and migration of HepG2 through regulating Wnt3a/ß-catenin signaling pathway.

The Association of Outdoor Walking Per Week with Mental Health and Costs of Psychotropic Drugs in Adults.

Regular walking confers many physical health benefits, including a reduced risk of disease-specific and all-cause mortality and better physical fitness. However, less is known about its role in mental health. Thus, the aims of this study were to determine the associations of outdoor walking per week with costs of psychotropic drugs used and mental health in adults. 500 adults aged 18 to 64 years in Hangzhou (China) reported sex, age, the name of the psychotropic drugs used and their dosage, and outdoor walking during the past 7 days. The cost that a person spends on buying psychotropic drugs for a month was considered psychotropic drugs costs. Overall mental health was assessed using the Chinese Version of the 12-Item General Health Questionnaire. The levels of walking in participants taking psychotropic were significantly lower than participants who did not taking psychotropic (p = 0.002). There was a significant negative correlation between mental health scores and minutes of walking per week and a significant positive correlation between the number of psychotropic drugs used and walking per week (p < 0.05). However, no particular associations were found between costs of psychotropic drug used and walking per week. Outdoor walking is prospectively associated with better overall mental health in adults. Then, awareness should be raised about the possible positive effects of outdoor walking on the mental health of adults.

Epidemiology of Indigenous Dengue Cases in Zhejiang Province, Southeast China.

Objective: Autochthonous transmission of the dengue virus (DENV) occurred each year from 2014 to 2018 in Zhejiang province, and became an emerging public health problem. We characterized the autochthonous transmission of the DENV and traced the source of infection for further control and prevention of dengue. Methods: Descriptive and spatiotemporal cluster analyses were conducted to characterize the epidemiology of autochthonous transmission of the DENV. Molecular epidemiology was used to identify the infection source. Results: In total, 1,654 indigenous cases and 12 outbreaks, with no deaths, were reported during 2004-2018. Before 2017, all outbreaks occurred in suburban areas. During 2017-2018, five out of eight outbreaks occurred in urban areas. The median duration of outbreaks (28 days) in 2017-2018 was shortened significantly (P = 0.028) in comparison with that in 2004-2016 (71 days). The median onset-visiting time, visiting-confirmation time, and onset-confirmation time was 1, 3, and 4 days, respectively. The DENV serotypes responsible for autochthonous transmission in Zhejiang Province were DENV 1, DENV 2, and DENV 3, with DENV 1 being the most frequently reported. Southeast Asia was the predominant source of indigenous infection. Conclusions: Zhejiang Province witnessed an increase in the frequency, incidence, and geographic expansion of indigenous Dengue cases in recent years. The more developed coastal and central region of Zhejiang Province was impacted the most.

Xueshuantong Improves Functions of Lymphatic Ducts and Modulates Inflammatory Responses in Alzheimer's Disease Mice.

Recent studies have revealed significant contributions of lymphatic vessels (LVs) to vital functions of the brain, especially related to clearance of waste from the brain and immune responses in the brain. These studies collectively indicate that enhancing the functions of LVs may improve brain functions during brain aging and in Alzheimer's disease (AD) where LV functions are impaired. However, it is currently unknown whether this enhancement can be achieved using small molecules. We have previously shown that a widely used Chinese herbal medicine Xueshuantong (XST) significantly improves functions and reduces pathology in AD transgenic mice associated with elevated cerebral blood flow (CBF). Here, we show that XST partially rescues deficits in lymphatic structures, improves clearance of amyloid-ß (Aß) from the brain, and reduces the inflammatory responses in the serum and brains of transgenic AD mice. In addition, we showed that this improvement in the lymphatic system occurs independently of elevated CBF, suggesting independent modulation and limited interaction between blood circulation and lymphatic systems. Moreover, XST treatment leads to a significant increase in GLT-1 level and a significantly lower level of MMP-9 and restores AQP4 polarity in APP/PS1 mice. These results provide the basis for further exploration of XST to enhance or restore LV functions, which may be beneficial to treat neurodegenerative diseases or promote healthy aging.

Knowledge, attitudes and practice regarding protection against COVID-19 among primary and middle students in Hangzhou / 中国学校卫生

Objective@#To analyze knowledge, attitudes and practice regarding protection against COVID-19 among primary and middle school students in Hangzhou and to provide a scientific basis for schools to carry out targeted prevention and control measures.@*Methods@#Anonymous network sampling survey was carried out through the questionnaire star, and a total of 14 216 subjects from primary and middle school in Hangzhou were recruited to fill in the questionnaire regarding knowledge, attitudes and practice of COVID-19 from March 3 to March 7, 2020.@*Results@#Primary and middle school students showed high awareness rate of transmission (85.83%) and incubation period (77.44%), but lower awareness on symptoms (44.70%) of COVID-19. The practice of wearing masks, cough etiquette and correct hand washing were 97.27%, 88.01% and 91.82%, respectively. The protective practice among primary and middle school students were generally good, 91.21% of them were at moderate level or above. 83.91% of primary and secondary school students reported worries about infection of COVID-19, and 55.42% of primary and secondary school students were anxious about returning to school. Primary school students and rural students were more anxious about returning to school(χ 2=46.66, 26.70, P<0.05).@*Conclusion@#The primary and middle school students in Hangzhou have a relatively good level of knowledge and practice concerning COVID-19. Yet, it is necessary to carry out targeted health education and strengthen mental health education for primary and middle school students.

The trend and influencing factors of health literacy among residents in Hangzhou from 2016 to 2020 / 预防医学

Objective@#To understand the changing trend and influencing factors of health literacy among residents in Hangzhou from 2016 to 2020, so as to provide basis for health literacy promotion. @*Methods@#The monitoring data of health literacy of residents in Hangzhou from 2016 to 2020 were collected. The five year cumulative growth and average growth rate were used to reflect the changing trend. The multivariate logistic regression model under complex survey design was used to analyze the influencing factors for health literacy. @*Results@#From 2016 to 2020, the health literacy levels of Hangzhou residents were 26.91%, 29.49%, 31.83%, 34.73% and 38.00%, respectively. The five year cumulative growth was 11.09% and the average growth rate was 9.01%. Among three aspects of health literacy, the levels of basic knowledge and concept as well as healthy lifestyle and behaviors increased year by year (P<0.05), with the average growth rates of 15.12% and 2.92%. Among six types of health problems, the levels of chronic disease prevention and treatment, basic medical treatment, scientific view, health information as well as safety and first aid increased year by year ( P<0.05 ), with the average growth rates of 32.76%, 15.82%, 8.41%, 7.12% and 1.53%, respectively. The multivariate logistic regression analysis showed that education level ( junior high school, OR=5.359, 95%CI: 1.151-24.953;high school/vocational high school/technical secondary school, OR=9.214, 95%CI: 2.906-29.213; college or above, OR=29.977, 95%CI: 9.689-92.741 ) and occupation ( students, OR=2.564, 95%CI: 1.113-5.907 ) were the influencing factors for health literacy. @*Conclusion @# The health literacy levels of Hangzhou residents from 2016 to 2020 have been increasing year by year. The residents with higher education levels and students may have higher health literacy levels.

Stabilization of microtubules improves cognitive functions and axonal transport of mitochondria in Alzheimer's disease model mice.

One major pathological process in Alzheimer's disease is mediated by hyperphosphorylated tau, which includes altered microtubules (MTs) and functions associated with tau. A potential way to compensate for altered MT function is to use an MT stabilizer, such as epothilone D (EpoD). Previous studies have demonstrated improved cognitive functions and axonal transport by EpoD in tau-mutation mice. Here, we demonstrated that extended EpoD treatment also has beneficial effects on APP/PS1 double-transgenic mice, improving their motor and spatial memory, increasing key synaptic protein levels, while not affecting amyloid plaque density or level of tau phosphorylation. Interestingly, EpoD appears to improve the retrieval of formed memories. We also observed improved axonal transport of mitochondria in cultured neurons from APP/PS1 mice. In addition, higher level of perineuronal nets are found in APP/PS1 mice injected with EpoD, suggesting potential contributions of increased inhibition. Our results suggest potential therapeutic value of EpoD in treating Alzheimer's disease.

Investigation on smoking status of residents aged 15 years and over in Hangzhou / 预防医学

Objective@#To learn the current situation of smoking among permanent residents aged 15 years and over in Hangzhou,so as to provide evidence for further smoking control.@*Methods@#From March to June of 2017,multi-stage random sampling method was used to select residents aged 15 years and over in Hangzhou from district (county),town (street),village (residential committee) and then residential groups. The global Adult Tobacco Survey (part of China) questionnaire was used to investigate smoking,second-hand smoking and smoking cessation status of residents. Logistic regression model was used to analyze the influencing factors for smoking and quitting behaviors.@*Results@#A total of 1 440 questionnaires were sent out and 1 434 valid ones were recovered,with an response rate of 99.58%. There were 359 (25.03%) current smokers and 333 (23.22%) daily smokers. The median number was 15 cigarettes per day in daily smokers,and the median age of starting daily smoking was 21 years old. There were 670 (62.33%) people exposed to second-hand smoking. There were 137 (27.62%) people successfully quitting smoking. The results of multivariate logistic regression analysis showed that men (OR=73.459,95%CI:38.970-138.458), 50 years old or above (OR:1.646-2.632,95%CI:1.020-4.710),primary school education (OR=3.267,95%CI: 1.586-6.732),high school or vocational school education (OR=1.902,95%CI: 1.109-3.261),awareness of second-hand smoking hazards (OR=2.485,95%CI:1.735-3.559) were the influencing factors for current smoking;men (OR=64.454,95%CI:29.031-138.691),50-59 years old (OR=0.281,95%CI:0.095-0.827),primary school education (OR=0.211,95%CI:0.053-0.841) were the influencing factors for quitting smoking.@*Conclusions@#The rates of current smoking and second-hand smoking of permanent residents aged 15 years and over in Hangzhou were 25.03% and 62.33%,respectively. Gender,age and education level were associated with current smoking and quitting smoking.

Residents' Awareness of Family Doctor Contract Services, Status of Contract with a Family Doctor, and Contract Service Needs in Zhejiang Province, China: A Cross-Sectional Study.

In China, family doctor services originated in 2009. After two years, the Chinese government proposed the establishment of a family doctor contract system suitable for China's national conditions. Then, in 2016, a multi-department jointly issued an important document, which further clarified the development goals of family doctor contract services in the next five years. Zhejiang Province has been exploring responsible doctor contract services since 2012, which was promoted throughout the province in 2015. OBJECTIVES: The aim of this study was to investigate the residents' awareness of Zhejiang Province, China, of family doctor contract services, the status of signing such a contract, and the demand for service items in the contracted service package. Further, we sought to explore the relevant influential factors in order to provide a reference and evidence-based recommendations for the further development of family doctor contract services. DESIGN: We enrolled 3960 residents from nine counties in Zhejiang Province using a multistage stratified random sampling method. A survey using a self-designed questionnaire was used to collect the demographic data, residents' awareness of family doctor contract services, the status of contracting, and demand for different items from October to December 2017. Data were analyzed by SPSS 21.0. RESULTS: In total, 3871 residents returned valid questionnaires, with a response rate of 97.75%. The awareness rate of residents of family doctor contract services was 71.58% (2771/3871). Age, education level, and chronic medical history status were the influencing factors affecting residents' awareness. The contracted rate was 50.43% (1952/3871). Age, education level, personal monthly income, chronic disease history, and awareness of family doctor contract services were the influencing factors. Residents who have a contract with family doctors have a higher demand for family doctor contract services, and different residents have different needs for the project because of their physical condition, education level, marital status, household registration, and personal monthly income level. The top three needs of the residents for contracted services were health consultation (84.64%), regular physical examination (81.71%), and increasing the proportion of medical insurance reimbursements (80.06%). CONCLUSIONS: The awareness rate of family doctor contract services and the contracting rate are unsatisfactory among residents of Zhejiang Province. It is suggested that the government should more heavily publicize family doctor contract services, expand the coverage, introduce personalized contract schemes to meet the needs of different groups, and promote the rapid development of family doctor contract services in Zhejiang Province.

Chinese Herbal Medicine Xueshuantong Enhances Cerebral Blood Flow and Improves Neural Functions in Alzheimer's Disease Mice.

Reduced cerebral blood flow in Alzheimer's disease (AD) may occur in early AD, which contributes to the pathogenesis and/or pathological progression of AD. Reversing this deficit may have therapeutic potential. Certain traditional Chinese herbal medicines (e.g., Saponin and its major component Xueshuantong [XST]) increase blood flow in humans, but whether they could be effective in treating AD patients has not been tested. We found that systemic XST injection elevated cerebral blood flow in APP/PS1 transgenic mice using two-photon time-lapse imaging in the same microvessels before and after injection. Subchronic XST treatment led to improved spatial learning and memory and motor performance in the APP/PS1 mice, suggesting improved neural plasticity and functions. Two-photon time lapse imaging of the same plaques revealed a reduction in plaque size after XST treatment. In addition, western blots experiments showed that XST treatment led to reduced processing of amyloid-ß protein precursor (AßPP) and enhanced clearance of amyloid-ß (Aß) without altering the total level of AßPP. We also found increased synapse density in the immediate vicinity of amyloid plaques, suggesting enhanced synaptic function. We conclude that targeting cerebral blood flow can be an effective strategy in treating AD.

The Relationship of TPOAb and TGAb with Risk of Thyroid Nodules: A Large Epidemiological Study.

Objective: The association between thyroid hormones, thyroid autoantibodies, and thyroid nodules are still not clear. The cross-sectional study, conducted in Hangzhou, China in 2010, aimed to identify the relationship of thyroid hormones and autoantibodies with thyroid nodules. Methods: Information regarding social demography was collected by a questionnaire. Thyroid hormones (triiodothyronine, thyroxin, free triiodothyronine, free thyroxin, thyrotropin), thyroid autoantibodies (thyroid peroxidase antibody, antithyroglobulin antibody), and thyroid nodules (diagnosed by ultrasonography) was measured in 1271 adults. The association of thyroid hormones and thyroid autoantibodies with thyroid nodules was evaluated using multiple logistic regression models. Results: The prevalence of thyroid nodules among males and females was 29.49% and 33.15%, respectively. The thyroid hormone level in the thyroid nodules group was significantly higher than the non-nodules group (all p values < 0.05), except reversely in TSH (thyroid stimulating hormone) (p = 0.0532) and TGAb (thyroglobulin antibody) (p = 0.0004). High levels of TPOAb (thyroid peroxidase antibody) (OR (Odds Ratio) = 1.51, 95% CI (confidence interval): 0.99-2.30) and TGAb (OR = 2.86, 95% CI: 1.49-5.51) were associated with increased risk of thyroid nodules, compared with corresponding low levels. However, following sub-analyses in two genders, the similar associations were only observed in females (TPOAb: OR = 1.63, 95% CI: 0.99-2.68; TGAb: OR = 3.13, 95% CI: 1.53-6.40). Conclusions: The present study indicated that thyroid autoantibodies were positively associated with the risk of thyroid nodules in Chinese coastal adults.

Relationship of anthropometric measurements to thyroid nodules in a Chinese population.

OBJECTIVE: Previous studies have found that overweight and obesity are related to numerous diseases, including thyroid cancer and thyroid volume. This study evaluates the relationship between body size and the presence of thyroid nodules in a Chinese population. METHODS: A total of 6793 adults and 2410 children who underwent thyroid ultrasonography were recruited in this cross-sectional study in Hangzhou, Zhejiang Province, China, from March to October, 2010. Sociodemographic characteristics and potential risk factors of thyroid nodules were collected by questionnaire. Height and weight were measured using standard protocols. Associations of height, weight, body mass index (BMI) and body surface area (BSA) with the presence of thyroid nodules were evaluated using multiple logistic regression models. RESULTS: After adjustment for potential risk factors, an increased risk of thyroid nodule incidence was associated with height (OR 1.15, 95% CI 1.02 to 1.30), weight (OR 1.40, 95% CI 1.24 to 1.58), BMI (OR 1.26, 95% CI 1.11 to 1.42) and BSA (OR 1.43, 95% CI 1.27 to 1.62) in all adults, but most obviously in women. In children, similar associations were observed between risk of thyroid nodule incidence and weight, BMI and BSA, but not height. BSA was the measurement most significantly associated with thyroid nodules in both adults and children. CONCLUSIONS: This study identified that the presence of thyroid nodules was positively associated with weight, height, BMI and BSA in both women and girls. It suggests that tall, obese individuals have increased susceptibility to thyroid nodules. TRIAL REGISTRATION NUMBER: NCT01838629.

Matricellular protein periostin contributes to hepatic inflammation and fibrosis.

Periostin actively contributes to tissue injury, fibrosis, atherosclerosis, and inflammatory diseases; however, its role in hepatic fibrosis is unclear. Herein, we revealed that periostin expression was significantly up-regulated in carbon tetrachloride- and bile duct ligation-induced mice with acute and chronic liver fibrosis. Deficiency in periostin abrogated the development of liver fibrosis in mice. Carbon tetrachloride treatment significantly increased α-smooth muscle actin, fibronectin, and collagen I levels in wild-type mice, which were unaffected in periostin-knockout mice. Periostin-deficient mice showed a significantly reduced area of collagen deposition and decreased levels of serum alanine aminotransferase and aspartate aminotransferase compared with wild-type mice after 2 weeks of carbon tetrachloride administration. Chemokine ligand 2, IL-6, IL-1ß, tumor necrosis factor-α, and tissue inhibitor of metalloproteinases 1 mRNA levels were significantly lower in periostin-deficient mice than in wild-type mice after carbon tetrachloride treatment. Periostin colocalized with hepatic stellate cell-derived collagen I and α-smooth muscle actin in mouse acute and chronic fibrotic liver tissues. Transforming growth factor (TGF)-ß1 markedly induced periostin expression in primary mouse hepatic stellate cells. Periostin-deficient mice showed significantly lower levels of TGF-ß1 and TGF-ß2 compared with wild-type mice after carbon tetrachloride treatment. High levels of periostin in patients with acute or chronic hepatitis correlated with TGF-ß1 and TGF-ß2 expression in serum from patients with hepatitis. Data indicate that periostin is a novel mediator of hepatic fibrosis development.

The association of thyroid nodule with non-iodized salt among Chinese children.

OBJECTIVE: The controversy that iodized salt may increase the risk of thyroid disorders has been aroused in China during the past decade. Most of studies focused on adult rather than children. We aimed to explore whether iodized salt was associated with an increased risk of thyroid nodule in Chinese children. METHODS: The cross-sectional study was conducted in Hangzhou, China, in 2010. Iodized salt intake, urine iodine concentration (UIC) and thyroid nodule (by ultrasonography) were measured in 3026 children. The associations of iodized salt with thyroid nodule were evaluated using multiple logistic regression models. RESULTS: The prevalence of thyroid nodule was 10.59% among Chinese children. Girls (11.89%) had higher prevalence of thyroid nodule than boys (9.26%). No significant association was observed between type of salt and thyroid nodule in pooled samples, boys and girls, respectively. Similar associations were observed between UIC and thyroid nodule. There was no significant association between milk consumption and thyroid nodule as well. CONCLUSION: The present study indicated that non-iodized salt may not increase the risk of thyroid nodules among Chinese children. Similar associations were observed between milk consumption, UIC and thyroid nodules.

Photoluminescence properties of a novel cyclometalated iridium(III) complex with coumarin-boronate and its recognition of hydrogen peroxide.

A novel neutral iridium(III) complex-based phosphorescent probe (Ir-2) for hydrogen peroxide (H2O2) has been designed and synthesized by incorporating a benzeneboronic acid pinacol ester (bpe) moiety into 3-(benzothiazol-2-yl)-7-hydroxy-coumarin (Bthc) as a cyclometalated ligand (Bthc-bpe). The photophysical behavior of Ir-2 was investigated by UV-Vis absorption spectroscopy, photoluminescence spectroscopy, and quantum mechanical calculations. The absorption spectra of the complex Ir-2 are dominated by the cyclometalated ligand; thus it shows an intense absorption band in the visible region at 460 nm with a molar extinction coefficient (ε) of about 3 × 10(4) M(-1) cm(-1), which is rarely found for typical polypyridine iridium(III) complexes. The complex Ir-2 displays efficient phosphorescent emission at 560 nm at room temperature originating from a mixed triplet metal-to-ligand charge-transfer ((3)MLCT, dπ(Ir) → π* (Bthc-bpe)) and triplet intraligand ((3)ILCT, π-π* (Bthc-bpe)) excited states as suggested by the DFT computational studies. Upon reaction with H2O2, the complex displays an emission decrease induced by an intense intermolecular aggregation due to the cleavage of the bulky benzeneboronic acid pinacol ester substituent, indicating that Ir-2 could act as an ON-OFF-type phosphorescent probe for H2O2. Additionally, selectivity studies reveal that the complex Ir-2 possesses high selectivity toward H2O2 over other reactive oxygen species (ROS).

Twist2 promotes self-renewal of liver cancer stem-like cells by regulating CD24.

Twist2 is a highly conserved basic helix-loop-helix transcription factor that plays a critical role in embryogenesis. Recent evidence has revealed that aberrant Twist2 expression contributes to tumor progression; however, the role of Twist2 in human hepatocellular carcinoma (HCC) and its underlying mechanisms remain undefined. In this report, we demonstrate that Twist2 is overexpressed in human HCC tumors. We show that ectopic expression of Twist2 induces epithelial-mesenchymal transition phenotypes, augments cell migration and invasion and colony-forming abilities in human HCC cells in vitro, and promotes tumor growth in vivo. Moreover, we found a higher percentage of CD24(+) liver cancer stem-like cells in Twist2-transduced HCC cells. Twist2-expressing cells exhibited an increased expression of stem cell markers Bmi-1, Sox2, CD24 and Nanog and an increased capacity for self-renewal. Knockdown of CD24 in HepG2/Twist2 cells decreased the levels of Sox2, pSTAT3 and Nanog, and reversed the cancer stem-like cell phenotypes induced by ectopic expression of Twist2. Furthermore, Twist2 regulated the CD24 expression by directly binding to the E-box region in CD24 promoter. Therefore, our data demonstrated that Twist2 augments liver cancer stem-like cell self-renewal in a CD24-dependent manner. Twist2-CD24-STAT3-Nanog pathway may play a critical role in regulating liver cancer stem-like cell self-renewal. The identification of the Twist2-CD24 signaling pathway provides a potential therapeutic approach to target cancer stem cells in HCCs.

[Toxoplasma gondii infection in pet dogs and owners in Hangzhou].

Sixty pet feeding families were obtained by random sampling in Hangzhou. The positive rate of IgG antibodies to Toxoplasma gondii in pet owners was 3.3% (4/120). The rate in males and females was 8.6% (3/35) and 1.2% (1/85) (χ2=4.207, P<0.05). The positive rate in pet dogs was 13.3% (8/60). The positive rate in dogs fed with a raw-meat diet (33.3%, 4/12) were significantly higher than that of others (4.2%, 2/48) (χ2=6.123, P<0.05).

Periostin contributes to the acquisition of multipotent stem cell-like properties in human mammary epithelial cells and breast cancer cells.

Periostin (POSTN), a recently characterised matricellular protein, is frequently dysregulated in various malignant cancers and promotes tumor metastatic growth. POSTN plays a critical role in the crosstalk between murine breast cancer stem cells (CSCs) and their niche to permit metastatic colonization. However, whether pro-metastatic capability of POSTN is associated with multipotent potentials of mesenchymal stem cells (MSCs) has not been documented. Here we demonstrate that POSTN promotes a stem cell-like trait and a mesenchymal phenotype in human mammary epithelial cells and breast cancer cells. Interestingly, ectopic overexpression of POSTN or recombinant POSTN treatment can induce human mammary epithelial cells and breast cancer cells differentiation into multiple cell lineages that recapitulate part of the multilineage differentiation potentials of MSCs. Moreover, POSTN is highly expressed in bone marrow-derived MSCs and their derived adipocytes, chondrocytes, and osteoblasts in vitro. Furthermore, POSTN promotes the growth of xenograft tumors in vivo. POSTN-overexpressing human mammary epithelial cells enhance breast tumor growth and metastasis. These data thus provide evidence of a new role for POSTN in mammary epithelial neoplasia and metastasis, suggesting that epithelial cancer cells might acquire CSC-like traits and a mesenchymal phenotype, as well as the multipotent potentials of MSCs to promote tumorigenesis and metastasis. Therefore, targeting POSTN and other extracellular matrix components of tumor microenvironment may help to develop new therapeutical strategies to inhibit tumor metastasis.

Associations of noniodized salt and thyroid nodule among the Chinese population: a large cross-sectional study.

BACKGROUND: The controversy that iodized salt may increase the risk of thyroid disorders has arisen in China during the past several years. OBJECTIVE: This study aimed to explore whether iodized salt increased the risk of thyroid nodule among a Chinese population. DESIGN: A cross-sectional study was conducted in Hangzhou, China, in 2010. Iodized salt intake, urinary iodine concentration (UIC), and thyroid nodule (by ultrasonography) were measured in 9412 adults. The associations of iodized salt with thyroid nodule were evaluated by using multiple mixed logistic regression models. RESULTS: The prevalence of thyroid nodule among men and women was 24.1% and 34.7%, respectively. Adults consuming noniodized salt had an increased risk of thyroid nodule (OR: 1.36; 95% CI: 1.01, 1.83). Similarly, compared with moderate salt appetite, mild salt appetite was associated with an increased risk of thyroid nodule among all adults (OR: 1.19; 95% CI: 1.03, 1.37) and among women (OR: 1.23; 95% CI: 1.03, 1.46). Furthermore, those who consumed neither iodized salt nor milk had a higher risk of thyroid nodule (OR: 1.72; 95% CI: 1.21, 2.43) than did those who consumed both iodized salt and milk. In addition, an increased risk of thyroid nodule (OR: 1.25; 95% CI: 1.07, 1.45) was observed among both pooled samples and women with low UIC. CONCLUSIONS: These findings indicate that low iodine intake may increase the risk of thyroid nodule in a Chinese population, particularly in women. Hence, the Universal Salt Iodization program may be indispensable for a coastal Chinese population such as that living in Hangzhou. This trial was registered at clinicaltrials.gov as NCT01838629.

Synthesis, characterization and electrochemiluminescent properties of cyclometalated platinum(II) complexes with substituted 2-phenylpyridine ligands.

Two neutral cyclometalated platinum(II) complexes, Pt(DPP)(acac) and Pt(BPP)(acac) (DPP = 2,4-diphenylpyridine, BPP = 2-(4-tert-butylphenyl)-4-phenylpyridine, acac = acetylacetone), have been synthesized and characterized by (1)H NMR spectroscopy, mass spectrometry, elemental analyses and by X-ray crystallography for Pt(DPP)(acac). Electrogenerated chemiluminescence (ECL) of the two complexes in the absence or presence of coreactant tri-n-propylamine (TPrA) in different solvents (CH(3)CN, CH(2)Cl(2), DMF, CH(3)CN/H(2)O (V, 50 : 50)) has been studied. The ECL spectra are identical to their own PL spectra, indicating that ECL processes lead to the same metal-to-ligand charge-transfer ((3)MLCT) excited state that is generated by light excitation. The ECL potentials of Pt(DPP)(acac) and Pt(BPP)(acac)/TPrA in CH(3)CN and CH(3)CN/H(2)O solution were at ~0.75 V vs. SCE, and significantly negatively shifted by about 0.6 V compared to that of the Ru(bpy)(3)(2+)/TPrA system. The ECL quantum efficiencies of the complexes are comparable to that of the Ru(bpy)(3)(2+)/TPrA system. The significant increase of the ECL signal in the coreactant system is due to the formation of the strongly reducing intermediate TPrA˙. It is noteworthy that the ECL efficiencies of the synthesized compounds are much higher than that of the tridentate polypyridyl ligands.