In order to standardize and perfect the medical psychology teaching at college level and improve the teacahing quality,the reform ideas are put forward based on the existing problems in the medical psychology teaching.The accurate positioning of the teaching objective of medical psychology is set according to the training objective,learning period and teaching hours of medical vocational schools.The teaching objective can be realized via the teaching con-tent system which is constructed with necessary basic pshcology knowledge,proper enlargement in the knowledge of psychology health and reasonable acceptance or reject in clinical psychology.

Objective To verify the correlation between rs17118 polymorphism of xyluloknase homolog (XYLB) gene and risk of ischemic stroke in a Chinese Han population.Methods A case-control study design was used.The case group was the patients with first-ever ischemic stroke and the control group was the healthy subjects from hospital physical examination.Taqman probe fluorescence quantitative polymerase chain reaction technique was used to detect the genotype distribution of rs17118 C/A polymorphisms.Results A total of 475 patients with ischemic stroke and 483 controls were enrolled in the study.The proportion of hypertension (67.9％ vs.22.2％;x2 =292.982,P ＜ 0.001) and diabetes (24.2％ vs.7.3％;x2 =25.864,P ＜ 0.001),as well as the levels of triacylglycerol (1.649 ± 1.126 mmol/L vs.1.157 ±1.480 mmol/L;t=3.592,P＜0.001),and low-density lipoprotein cholesterol (3.499 ± 1.163 mmol/L vs.3.105 ± 0.627 mmol/L;t =-6.227,P ＜ 0.001) in the case group were significantly higher than those in the control group,but the total cholesterol level was significantly lower than that in the control group (5.144 ± 1.296 mmol/L vs.5.491 ± 1.335 mmol/L;t =4.650,P ＜ 0.001).The AA genotyp e (11.4％ vs.7.5 ％;x2 =6.136,P =0.016) and A allele (32.3 ％ vs.26.4％;x2 =8.093,P =0.005) frequencies in the case group were significantly higher than those in the control group.Multivariatelogistic regression analysis showed that after adjusting for traditional risk factors,the risk of ischemic stroke in AA genotype carriers was 1.97 times of the CC genotype carriers (odds ratio 1.971,95％ confidence interval 1.040-3.736,P=0.038).Conclusions The rsl7118C/A polymorphism of XYLB gene may be associated with the risk of ischemic stroke in the Chinese Han population.

OBJECTIVETo discuss the impact of huolong moxibustion on pain degree in the patients of discogenic low back pain and the effect mechanism.

METHODSSixty-five patients were randomized into an observation group (33 cases) and a control group (32 cases). In the observation group, huolong moxibustion was applied along the distribution of the Governor Vessel, once a day. In the control group, the routine traction combined with massage therapy was adopted, once a day. In the two groups, the treatment was given 6 times a week, at interval of 1 day. In 3 weeks of treatment, pain score and serum tumor necrosis factor α (TNF-α) level were compared with those before treatment in the two groups.

RESULTSCompared with those before treatment, pain score and TNF-α level were reduced significantly after treatment in the two groups (both P < 0.05). The results in the observation group were lower than those in the control group (pain score: 1.95 ± 0.61 vs 2.11 ± 0.61; TNF-α: (1.33 ± 0.30) nmol/L vs (1.55 ± 0.48) nmol/L, (both P < 0.05).

CONCLUSIONHuolong moxibustion significantly alleviates pain in the patients of discogenic low back pain and its effect mechanism is possibly relevant with TNF-α reducing.

Adult ; Female ; Humans ; Low Back Pain ; metabolism ; therapy ; Male ; Massage ; Middle Aged ; Moxibustion ; Pain Measurement ; Traction ; Tumor Necrosis Factor-alpha ; metabolism ; Young Adult

OBJECTIVETo analyse the features of gray scale and colour Doppler sonography for carotid body tumor, to improve the sonographic diagnostic accuracy.

METHODSA retrospective review was performed of sonographic material of 18 carotid body tumors by gray scale sonography and 11 by colour Doppler sonography, with comparison with other diseases which are frequently misdiagnosed as carotid tumor.

RESULTSWell-defined, even weakly hypoechoic masses were noted on gray scale ultrasonogram at the carotid bifurcation, commonly broadening the carotid bifurcation and often encasing the common, external and internal carotid arteries. Disorderly non-echoic channel- like structures in the tumor were sometimes observed. Colour Doppler sonography showed abundant flow in the tumor. The non-echoic channel- like structures were vascularities. Seventeen masses diagnosed by ultrasound were proved to be carotid body tumors. The other was confirmed as a neurogenic tumor, giving an accuracy rate of 94.4% for sonographic diagnosis.

CONCLUSIONSonographic examination of the carotid body tumor is highly accurate. It is safe and reliable.

Adult ; Aged ; Carotid Body Tumor ; diagnostic imaging ; Diagnosis, Differential ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Sensitivity and Specificity ; Ultrasonography, Doppler, Color

OBJECTIVETo investigate the effects of rs10916581, a common single nucleotide polymorphism (SNP) located in the promoter region of pre-miR-320b-2, on coronary heart disease (CHD) risk and circulating microRNA-320b (miR-320b) level. To explore potential factors influencing circulating miR-320b level.

METHODSRs10916581 was genotyped in a case-control study with 1 507 CHD cases and 1 379 age- and sex-frequency-matched controls. The cases were consecutively recruited from 3 hospitals (Tongji Hospital, Union Hospital, and Wugang Hospital) in Wuhan city (Hubei, China) between May 2004 and October 2009 and all the controls resided in Wuhan communities. A subgroup of 174 CHD cases and 181 non-diabetes controls without acute infection were randomly selected and their circulating miR-320b levels were detected using quantitative reverse transcriptase polymerase chain reaction assays. The association of rs10916581 with CHD susceptibility was analyzed with multivariable logistic regression model. Generalized linear regression model was used to explore the associations of rs10916581 and some other factors with circulating miR-320b level.

RESULTSIn single-factor logistic regression analysis, no association was found between rs10916581 and CHD risk. After adjustment for age, sex, BMI, smoking status, hypertension, diabetes, total triglyceride, total cholesterol/high density lipoprotein (TC/HDL-C), the result did not materially alter(compared with CC genotype, the OR (95%CI) of CHR in the subjects carried CT, TT, CT+TT genotypes were 0.94 (0.76-1.15), 0.99 (0.74-1.33) and 0.95 (0.78-1.16) ). No significant interactions were observed between the conventional risk factors of CHD (age, gender, smoking status, BMI, hypertension, diabetes, CHD family history) and rs10916581 on CHD risk (P > 0.05). Rs10916581 showed no significant association with circulating miR-320b level in cases, controls or total population (β(95%CI) was -0.028 (-0.495-0.440), 0.250 (-0.226-0.727) and 0.134 (-0.218-0.486) respectively, P > 0.05). However, circulating miR-320b level was negatively associated with BMI (β (95%CI) was -0.140 (-0.261--0.020), P = 0.022) while positively associated with TC/HDL(β (95%CI) was 0.620 (0.261-0.979), P = 0.001) in cases, and in total population, its circulating level tended to be lower in diabetes or hypertension patients (β(95%CI) was -1.025 (-1.696--0.354) and -0.594 (-1.138--0.049) respectively, P = 0.003, 0.033 respectively) and was positively associated with TC/HDL-C (β(95%CI) was 0.108 (0.027-0.190), P = 0.009).

CONCLUSIONThe common SNP (rs10916581) in the promoter region of pre-miR-320b-2 might have little contribution to the CHD predisposition in Chinese Han population, and it might not affect circulating miR-320b level. Conventional CHD risk factors (BMI, TC/HDL-C, hypertension and diabetes) might have effects on its circulating level.

Aged ; Case-Control Studies ; China ; ethnology ; Coronary Disease ; genetics ; Diabetes Mellitus ; Genotype ; Humans ; Hypertension ; Logistic Models ; MicroRNAs ; adverse effects ; blood ; genetics ; Polymorphism, Single Nucleotide ; genetics ; Promoter Regions, Genetic ; Risk Factors ; Triglycerides

Objective To investigate the characteristics of distribution and expression profiles of plasma miRNA in childhood acute lymphocytic leukemia (cALL) patients;the association between cALL incidence risk and plasma miRNA levels;the feasibility of plasma miRNA serving as cALL diagnostic biomarker.Methods A total of 111 pairs of newly diagnosed cALL patients and patients with fractures were collected from Shenzhen Children's Hospital,China,between January 2015 and November 2016.Age and sex of the cases and controls were 1 ∶ 1 matched and LNATM miRNA microarray was performed using 4 pairs of cALL and controls selected from the sample population.The expression level of miRNA was validated by real time quantitative PCR.Conditional logistic regression analysis was applied to evaluate the association between miRNA expression levels and the incidence risk of cALL.The receiver operating characteristic curve (ROC) and reclassification analysis were conducted to assess the feasibility of miRNAs serving as biomarkers for cALL.Results A total of 204 differentially expressed miRNA were screened out and let-7f-5p,miR-5100,miR-25-3p and miR-3654 were selected for validation identified according to the inclusion criteria.The expression levels of let-7f-5p,miR-5100 and miR-25-3p in the cALL patients were significantly lower than those of the controls (P＜0.01).After adjusting for confounding factors,3 miRNAs remained significantly associated with the risk of cALL (OR and 95％CI were 0.84 (0.76-0.92),0.81 (0.73-0.90)and 0.81 (0.74-0.89),respectively.Results from both the ROC analysis and reclassification analysis showed that introduction of one or more miRNA to traditional risk factors improved the area under the curve (P＜0.05) and provided additional values to diagnosis (P＜0.01).Conclusion The expression levels of let-7f-5p,miR-5100 and miR-25-3p were significantly associated with the incidence rate of cALL,and these miRNAs might serve as promising biomarkers for cALL.

Objectives:This study aimed to evaluate the effect of the strategies on COVID-19 outbreak control in Shenzhen, and to clarify the feasibility of these strategies in metropolitans that have high population density and strong mobility.Methods:The epidemic feature of COVID-19 was described by different phases and was used to observe the effectiveness of intervention. Hierarchical spot map was drawn to clarify the distribution and transmission risk of infection sources at different time points. The Susceptible-Exposed-Infectious-Asymptomatic-Recovered model was established to estimate case numbers without intervention and compare with the actual number of cases to determine the effect of intervention. The positive rate of the nucleic acid test was used to reflect the risk of human exposure. A survey on COVID-19 related knowledge, attitude and behaviors were used to estimate the abilities of personal protection and emergency response.Results:The epidemic of COVID-19 in Shenzhen experienced the rising, plateau and decline stage. The case number increased rapidly at the beginning, with short duration of peak period. Although the epidemic curve showed human-to-human transmission, the "trailing" was not obvious. From the spot map, during the intervention period, the source of infection was widely distributed. More cases and higher transmission risk were observed in areas with higher population density. After the effective intervention measures, both infection sources and the risk of transmission decreased. After compared with the estimated case numbers without intervention, actual number proved the COVID-19 control strategies were effective. The positive rate of nucleic acid test for high risk populations decreased and no new cases reported since February 16. Shenzhen citizens had high knowledge, attitude and behavior level, and high protection ability and emergency response.Conclusions:Although the response initiated by the health administration department played a key role at the early stage of the epidemic, it was not enough to contain the outbreak of COVID-19. The first-level emergency response initiated by provincial and municipal government was effective and ensured the start of work resumption after the Spring Festival. Metropolitans like Shenzhen can also achieve the goals of strategies and measures for containment and mitigation of COVID-19.

ObjectiveTo understand the characteristics of PM_2.5 pollution in the air of Pearl River Delta city in Guangdong Province under the COVID-19 epidemic and the health risks of inhaling elements in PM_2.5. MethodsIn 2022， 10 PM_2.5 monitoring points were set up in 10 districts in Guangzhou， Shenzhen， Foshan and Zhuhai， and air samples were collected for 7 consecutive days every month to analyze the concentration of PM_2.5 and the 12 elements in PM_2.5. The classic "four-step" method was used to evaluate the carcinogenic risk and chronic non-carcinogenic risk of the elements in air PM_2.5 on health. The age-sensitive characteristics of metal elements were combined in the carcinogenic risk assessment， and age-sensitive factors were introduced to analyze the impact of air pollution on population health. ResultsA total of818 samples were collected. and the average annual PM_2.5 concentration in the four cities of the Pearl River Delta was 30.17 （1.00-166.00， s=21.06） μg·m^-3， which was lower than the concentration limit of the secondary standard of the Ambient Air Quality Standard （GB 3095-2012）. The difference of PM_2.5 concentration in the four cities was statistically significant. The PM_2.5 concentrations in Zhuhai and Shenzhen， which were located near the sea， were lower than those in Guangzhou and Foshan. The monthly mean concentration of PM_2.5 in the four cities was the lowest at 13.70 （4.00-34.00， s=5.93） μg·m^-3 in July and the highest at 57.73 （14.00-146.00， s=27.96） μg·m^-3 in January， showing a low concentration from May to October and a high concentration from November to April of the following year. The average daily PM_2.5 concentration exceeded the secondary standard for 29 days， mainly distributed in January and November. The average annual mass concentration of elements in PM_2.5 in the four cities was Al>Mn>Pb>As>Ni>Cr>Se>Sb>Cd>Tl>Be>Hg. AS and Mn have chronic non-carcinogenic risk in population， while Cr， AS， Cd， Be and Ni have carcinogenic risk in population. ConclusionThe PM_2.5 pollution levels of the four cities in the Pearl River Delta are low and variable. Coastal cities are lower than non-coastal cities， which shows the characteristics of first decreasing and then increasing throughout the year. The order of mass concentration of metal elements of PM_2.5 in four cities is basically the same except Be and Ni. As and Mn in PM_2.5 show a certain degree of chronic non-carcinogenic risk， and As， Cr， Cd， Ni and Be have a certain degree of carcinogenic risk. The four cities need to take effective intervention measures to continue to strengthen the pollution control and health protection of Cr， As， Cd and Mn in the air， and control the health burden caused by air pollution.

Background Metals and metalloids in fine particulate matter (PM_2.5) may cause damage to the respiratory and circulatory systems of the human body, and long-term exposure is prone to causing chronic poisoning, cancer, and other adverse effects. Objective To assess the distribution characteristics of metals and metalloids in outdoor PM_2.5 in a southern city of China, conduct source apportionment, and evaluate the associated health risks, thereby providing theoretical support for further pollution control measures. Methods PM_2.5 samples were collected in districts A, B, and C of a southern China city, and the concentrations of 17 metals and metalloids were detected by inductively coupled plasma-mass spectrometry (ICP-MS). Pollution sources were assessed through enrichment factor and principal components analysis, and the main pollution sources were quantified using absolute principal component scores-multivariate linear regression (APCS-MLR). Health risks were evaluated based on the Technical guide for environmental health risk assessment of chemical exposure (WS/T777—2021). Results The ambient air PM_2.5 concentrations in the city were higher in winter and spring, and lower in summer and autumn. The annual average concentrations of ambient PM_2.5 in districts A, B, and C were 36.7, 31.9, and 24.4 μg·m⁻³, respectively. The ambient PM_2.5 levels in districts B and C were below the second-grade limit set by the Ambient air quality standards (GB 3095—2012). The enrichment factors of cadmium (Cd), aluminum (Al), and antimony (Sb) were greater than 10, those of copper (Cu), lead (Pb), arsenic (As), nickel (Ni), mercury (Hg), and molybdenum (Mo) fell between 1 and 10, and those of manganese (Mn), vanadium (V), chromium (Cr), cobalt (Co), barium (Ba), beryllium (Be), and uranium (U) were below or equal to 1. The comprehensive evaluation of source analysis showed that the main pollution sources in districts A and C and the whole city were coal-burning. In district B, the main pollution source was also coal combustion, followed by industrial process sources and dust sources. The carcinogenic risks of As and Cr were between 1×10⁻⁶ and 1×10⁻⁴. However, the hazard quotients for 15 metals and metalloids in terms of non-carcinogenic risk were below 1. Conclusion Cr and As in the atmospheric PM_2.5 of the city present a certain risk of cancer and should be paid attention to. In addition, preventive control measures should be taken against relevant pollution sources such as industrial emission, dust, and coal burning.