Objective:To establish a method of ion chromatography for the determination of sodium, potassium and citric acid in potassium sodium hydrogen citrate granule. Methods:The chromatographic conditions for potassium and sodium were as follows:a Di-onex IonPac CS12A column (250 mm × 4. 6 mm, 5μm), 0. 02 mol·L-1 methane sulfonic acid solution as the mobile phase, the flow rate of 1. 0 ml·min-1 , the suppressor of CSRS 300, the inhibition current of 59 mA, the inhibition type conductivity detector, and the injection volume of 25 μl. The chromatographic conditions for citrate were as follows: a Dionex HPICE-AS1 colunm ( 250 mm × 9. 0 mm,7. 5 μm), 0. 015 mol·L-1sulfuric acid solution as the mobile phase, the flow rate of 0. 6 ml·min-1, the detection wave-length of 220 nm and the injection volume of 10 μl. Results: The linear range of sodium was 0.82-82.49 μg·ml-1(r=0.9999), and the average recovery was 98.9%(RSD =0.55%, n =9). The linear range of potassium was 1.38-137.89 μg·ml-1 (r =1. 0000), and the average recovery was 100. 5% (RSD=0. 53%, n=9). The linear range of citric acid was 0. 021-10. 600 μg· ml-1(r=1. 0000), and the average recovery was 99. 1% (RSD=0. 54%, n=9). Conclusion:The method is simple, rapid and ac-curate, and can be used for the quality control of potassium sodium hydrogen citrate granule.

Objective: To investigate the detection of thyroid nodules and its influencing factors among residents in Dinghai District, Zhoushan City, Zhejiang Province, so as to provide insights into formulation of thyroid nodule control measures. Methods: Residents who were at ages of 18 years and older and had lived for 5 years or more in Dinghai District were sampled using a multi-stage stratified random sampling method from July to September 2022. Basic information was collected using a basic personal information registration form, the height, body weight, waist circumference and blood pressure were measured, and fasting blood glucose, low-density lipoprotein cholesterol (LDL-C) and urinary iodine were detected. Ultrasound examination of the thyroid gland in the neck was performed using a color ultrasound device; and the detection of thyroid nodules was analyzed and standardized by the population of the Sixth National Population Census in 2010. Factors affecting thyroid nodules using a multivariable logistic regression model. Results: A total of 434 residents were included, with a mean age of (49.97±14.74) years. There were 151 males (34.79%) and 283 females (65.21%). Thyroid nodules were detected in 232 cases, with a crude detection rate of 53.46% and a standardized detection rate of 35.69%, and the crude detection rate was 19.82% for solitary nodules and 33.64% for multiple nodules. Multivariable logistic regression analysis identified gender (female, OR=2.355, 95%CI: 1.520-3.647), age (40 to 59 years, OR=2.344, 95%CI: 1.416-3.878; 60 years and older, OR=5.157, 95%CI: 2.869-9.272), high level of LDL-C (OR=1.706, 95%CI: 1.065-2.734) as factors affecting thyroid nodules. Conclusion The risk of thyroid nodules is higher among residents who are female, are 40 years and older and have high levels of LDL-C in Dinghai District.

Objective:To evaluate the status and influencing factors of psychiatric comorbidities of patients with epilepsy (PWEs) in Hubei province during the outbreak of COVID-19.Methods:From February 23, 2020 to March 5, 2020, a network questionnaire survey (including demographic characteristics, seizures, Generalized Anxiety Disorder Scale-7 score, Patient Health Questionnaire-9 score, Insomnia Severity Index score) was conducted among 570 PWEs who visited the Epilepsy Center of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology during April 1, 2019 and January 20, 2020. SPSS 22.0 software was used for correlation analysis of sociodemographic characteristics, epilepsy related factors, perceived threat to the COVID-19 and psychiatric comorbidity (depression, anxiety and insomnia) of PWEs during the COVID-19 epidemic.Results:A total of 362 valid questionnaires were included for analysis (the response rate was 63.51%,362/570). Thirty-four (9.4%), forty-seven (13.0%) and seventy-one (19.6%) patients suffered from anxiety, depression and insomnia, respectively. Patients with seizure frequency ≥2 times/month before the epidemic ( OR=3.395,95% CI 1.561-7.384, P=0.002), poor subjective quality of life during the epidemic ( OR=10.753,95% CI 1.938-59.654, P=0.024), and moderate to severe worry about bad impact of the epidemic on epilepsy ( OR=3.077, 95% CI 1.382-6.853, P=0.006) were more likely to be anxious. Patients with poor subjective quality of life during the epidemic ( OR=6.188, 95% CI 1.317-29.079, P=0.021) were more likely to be depressed. Patients with COVID-19 related symptoms ( OR=3.609, 95% CI 1.674-7.778, P=0.001), children ( OR=3.090, 95% CI 1.759-5.431, P<0.001), seizure frequency ≥2 times/month before the epidemic ( OR=1.907, 95% CI 1.017-3.575, P=0.044), and moderate to severe worry about unanticipated seizures ( OR=2.555, 95% CI 1.370-4.764, P=0.003) were more likely to suffer from insomnia. Conclusions:During the COVID-19 epidemic, parts of PWEs suffered from anxiety, depression and insomnia. PWEs with poor subjective quality of life, high frequency of epileptic seizures before the epidemic, excessive worry about bad impact of the epidemic on epilepsy and excessive worry about unanticipated seizures were prone to anxiety, depression and insomnia.

OBJECTIVETo investigate the effect of noise on the antioxidant capacity in different regions of brain tissue in guinea pigs.

METHODSThirty male white red-eye guinea pigs were equally and randomly divided into five groups: 1-, 3-, 7-, and 14-day groups after noise exposure and control group. The guinea pigs of the experimental groups were exposed to steady white noise with a sound pressure level at 100 dB for 8 h per day and for 2 consecutive days. The auditory brainstem response (ABR) of guinea pigs, as well as the glutathione (GSH) level, methane dicarboxylic aldehyde (MDA) level, and superoxide dismutase (SOD) activity in the cerebrum, cerebellum, and hippocampus, was determined prior to and 1, 3, 7, and 14 days after noise exposure.

RESULTSAfter noise exposure, the shifts in ABR threshold of the experimental groups were significantly higher than that of the control group (P<0.05). Compared with those in the control group, the SOD activity and GSH level both significantly decreased in the cerebrum tissue of each experimental group after noise exposure (P<0.05) and MDA content significantly increased in the 1-day group (P<0.05). As for cerebellum tissue, the SOD activity and GSH level in the 7-day group were significantly lower than those in the control group (P<0.05), but there was no difference in MDA level between each experimental group and the control group (P>0.05). In comparison with those in the control group, the GSH and MDA levels in the 1-day group after noise exposure were significantly higher, and the GSH and MDA levels in the 3-day group and the MDA level in the 7-day group after noise exposure were significantly lower (all P<0.05).

CONCLUSIONNoise exposure can lead to hearing loss and affect the antioxidant capacity of brain tissue, which indicates that the improvement in antioxidant levels may alleviate noise-induced damage.

Animals ; Antioxidants ; chemistry ; Brain ; metabolism ; Brain Chemistry ; Evoked Potentials, Auditory, Brain Stem ; Glutathione ; chemistry ; Guinea Pigs ; Male ; Malondialdehyde ; chemistry ; Noise ; adverse effects ; Superoxide Dismutase ; chemistry

OBJECTIVETo develop the knowledge, attitude and practice questionnaire on the prevention and control of occupational diseases for occupational groups, and to provide a convenient and effective tool for the survey of knowledge, attitude, and behavior on the prevention and control of occupational diseases in occupational groups and the evaluation of intervention effect.

METHODSThe initial questionnaire which was evaluated by the experts was used to carry out a pre-survey in Guangzhou, China. The survey results were statistically analyzed by t test, identification index method, correlation analysis, and Cronbach's a coefficient method. And then the questionnaire was further modified, and the content of the questionnaire was determined finally.

RESULTSAfter modification, there were 18 items on knowledge, 16 items on attitude, and 12 items on behavior in the "Knowledge, attitude and practice questionnaire on the prevention and control of occupational diseases for enterprise managers"; there were 19 items on knowledge, 10 items on attitude, and 11 items on behavior in the "Knowledge, attitude and practice questionnaire on the prevention and control of occupational diseases for workers".

CONCLUSIONThe knowledge, attitude and practice questionnaire on the prevention and control of occupational diseases for occupational groups is developed successfully, and it is a convenient and effective tool for the survey of knowledge, attitude, and behavior on the prevention and control of occupational diseases in occupational groups and the evaluation of intervention effect.

China ; Health Knowledge, Attitudes, Practice ; Humans ; Occupational Diseases ; prevention & control ; Surveys and Questionnaires

Objective We evaluated the role of a quality improvement initiative in improving clinical outcomes in peritoneal di-alysis ( PD) . Methods In a retrospective analysis of 6 years of data from a hospital registry, the period between 1 July 2005 and 30 June 2008 ( control group) provided baseline data from before implementation of systemic outcomes monitoring, and the period between 1 July 2008 and 30 June 2011 [continuous quality improvement (CQI) group] represented the time when a CQI program was in place.Per-itonitis incidence, patient and technique survival, cardiovascular status, causes of death, and drop-out were compared between the groups. Results In the 370 patients of the CQI group and the 249 patients of the control group, the predominant underlying kidney diseases were chronic glomerulonephritis and diabetic nephropathy.After implementation of the CQI initiative, the peritonitis rate de-clined to 1 episode in 77.3 patient-months from 1 episode in 22.6 patient-months.In the CQI group, the complicance of blood pressure was more significantly improved than the control group ( 67.8% vs 47.4%,P<0.05).During the 3 years of follow-up,cardiothoracic ratio and IVST were significantly increased in the control group [0.55 ± 0.08 vs 0.51 ±0.05,P<0.05,11.07 ±1.66 mm vs 10.25 ±1.38 mm, P<0.05〗.The difference of LVID between the two groups was signifi-cant at the 2nd and 3rd year of follow-up(P<0.05).Patient survival at 1, 2, and 3 years was significantly higher in the CQI group (97.3%, 96.3%, and 96.3%respectively) than in the control group (92.6%, 82.4%, and 67.3%respectively, P<0.001).Imple-mentation of the CQI initiative also appeared to significantly improve technique survival rates:95.6%, 92.6%, and 92.6%in the CQI group compared with 89.6%, 79.2%, and 76.8%in the control group (P<0.001) after 1, 2, and 3 years respectively. Conclusion Integration of a CQI process into a PD program can significantly improve the quality of therapy and its outcomes.

Objective To investigate the relationship between cerebral white matter fractional anisotropy(FA)and metabolite con-centrations measured by 1 H magnetic resonance spectroscopy(1 H-MRS)in healthy adults.Methods Diffusion tensor imaging(DTI) and 1 H-MRS were acquired from thirty-one healthy adults at 3.0 T MR system.The concentrations of N-acetylaspartate(NAA), choline(Cho),creatine(Cr),the ratios of NAA/Cr and FA values of DTI were measured in 353 voxels,covering the bilateral medium corona radiata.According to the age,all voxels were divided into two groups:the senior group (mean age=29 years),and the senior group(mean age=5 6 years).The correlations between FA values and age were analyzed using Pearson’s correlation coefficients.The correlations between FA values and metabolite concentrations were estimated using partial correlations test controlling for the age re-lated bias.Results Pearson’s correlation analysis revealed a negative correlation between FA values and age in 353 voxels(r=-0.146,P<0.05),senior group(r=-0.204,P<0.05)and senior group(r=-0.162,P<0.05).Only the correlation between NAA and FA values were significant(r=0.339,P<0.05;r=0.213,P<0.05;r=0.430,P<0.05).There were positive relation-ships between FA values and NAA/Cr among 353 voxels (r=0.166,P<0.05)and senior group(r=0.305,P<0.05).Conclusion There are correlations between cerebral white matter FA values and metabolite concentrations measured by 1 H-MRS .Combining 1 H-MRS with DTI can reveal the relationship between microscopic white matter integrity and metabolic characteristics of the white matter.

Objective To study the expression of metallothioneiu (MT)and Fas ligand (FasL) in rectal carcinoma and their association with metastasis to lymph node and liver. Methods Immunohistochemistry method and quantitative RT-PCR technique were used to assay the expression of MT and FasL at protein and mRNA levels in 85 cases of rectal carcinoma. The data of each group were compared and analysed by statis-tics. Results The rates of MT expression in primary foci, normal rectal mucosa, lymph node metastasis and hepatic metastasis were 57.3% ,29.6% ,79.5% and 61.8% respectively. And the rates of FasL expression were 45.8%, 17.8% ,63.5% and 90.3%, respectively. The positive rates of MT and FasL in primary foci, hepatic and lymph node metastasis were higher than that in normal mucosa (X~2 =33. 1322,56. 7142,P < 0.01). Among clinical stages, the positive rates of MT and FasL in C and D were higher than that in A and B (X~2 = 18. 8372,21. 5823 ,P <0.01). And higher rates of MT and FasL expression were detected in low differentiation adenocarcinoma and mucus adenocarcinoma than in middle-high differentiation adenocarcino-ma(X~2 = 11.2146,9.3136,P < 0. 05). High MT mRNA level was found in lymph node metastasis and high FasL mRNA level in hepatic metastasis. Conclusions The detection of MT and FasL expression was useful in clinic to predict lymph node metastasis and early diagnosis of liver metastasis of rectal carcinoma respec-tively. Assay of MT and FasL expression has prognostic values for rectal carcinoma patients.

Background and purpose: Trichostatin A (TSA), an antifungal antibiotic with cytostatic and differentiating properties in mammalian cell culture, is a potent and specific inhibitor of histone deacetylase (HDAC). This study was aimed to investigate the influence of trichostatin A on the growth of human lung adenocacinoma cells in vitro, and to explore the mechanisms involved. Methods: MTT assay was employed to evaluate the inhibitory effect of TSA (0.1, 0.2,0.4 μmol/L) on the growth of human NCI-H1299 cancer cells. The cell cycle distribution and apoptotic ratio were determined by flow cytometry. The acetyl level of histone H4 after TSA treatment was detected by Western blot;the mRNA level of Bax,Bcl-2,p21 and cyelinBl was measured by Real-time PCR. Results: TSA inhibited the growth of NCI-H1299 cells in a dose-and time-dependent manner. Flow cytometry showed that the cells were blocked at G_2/M phase and cell apoptosis was increased compared to the control. TSA significantly increased the acetyl level of histone H4, induced p21 and Bax expression, and inhibited the expression of cyclin BI and Bcl-2. Conclusion: TSA inhibits the growth of lung cancer cells in vitro through inducing cell apoptosis and cell cycle arrest, which might be related to its regulatory effects on the acetyl blot of histone and the expression of p21, Bax, Bcl-2 and cyclinBl.

Objective:To investigate the effect on the expression of Slug for the trasfection of miR-200c combined with the research on the ability of migration of breast cancer cell BT549.Methods:Chemically synthesized miR-200c mimic was trasfected into BT549 cells,which have high metastatic potential.The effect on the ability of migration of breast cancer cell BT549 for the transfection of miR-200c was analyzed by Transwell migration assay and Wound healing assay.The expression of Slug and E-cadherin mRNA was detected by Real-time PCR.The expression of Slug protein was detected by Western blot.Results:Transfection with miR-200c mimic significantly down-regulated the expression of Slug as compared with the control group (P<0.05).BT549 cell tranfected with miR-200c mimic had lower levels of migration capacity than cells in the control group (P<0.05).Conclusion:miR-200c inhibits Epithelial-mes-enchymal transition by suppressing Slug leading to down-regulation of migration capacity of breast cancer cell BT549.