Aim To construct a lentiviral low expres-sion of miR-139-5 p vector and validate its expression efficiency in H9c2 cells. Method Target sequence was designed according to the sequence of rat miR-139-5p. Oligonucleotide duplex was synthesized and cloned into the lentiviral vector pGC-LV. The recombi-nant lentiviral vector, pHelper 1. 0, and pHelper 2. 0 were co-transfected into 293T cells, packaging virus. Then H9 c2 cells were infected with the supernatant containing lentiviral particles, and its infection effi-ciency and miR-139-5 p expression were determined by fluorescent microscope and real-time quantitative PCR, respectively. Results A lentiviral low expression of miR-139-5p vector was successfully constructed. The infection efficiency in H9c2 cells reached over 95%, and the relative expression of miR-139-5p was significantly down-regulated. Conclusion The lentiviral low expression of miR-139-5p vector is successfully constructed, and the expression of miR-139-5p in infected H9c2 cells is inhibited effectively.

Objective:To investigate the classification of patients with gout, and further analyze their clinical features.Methods:Outpatients with gout were enrolled from January 2018 to July 2019 in Depart-ment of Rheumatology, Zhongshan Hospital. Subjects were classified into four groups according to their 24-hour urinaryexcretion and fractional excretion of urate. Clinical features of different groups were analyzed using one-way Analysis of Variance (ANOVA), Kruskal-Wallis H test, or χ2 test. Results:Finally, 378 subjects were enrolled in this cross-sectional study. Among them, 186(49.2%) were renal underexcretion type, 100(26.5%) were combined type, 57(15.1%) were renal overload type, 35(9.3%) were the normal type. Renal underexcretion type was the main subtype in any age-stratified groups. With aging, the proportion of combined type decreased, while the normal type increased. Participants in the combined type were the youngest [(42±14) years of age] with the highest estimated glomerular filtration rate [(94±18) ml·min -1·1.73 m -2], while their serum urate levels were the highest [(554±104) μmol/L]. Subjects in the normal type were the oldest [(60±15) years of age] with the lowest estimated glomerular filtration rate [(71±19) mL·min -1·1.73 m -2], however, their serum urate concentrations were the lowest [(427±118) μmol/L], The difference was statistically significant (age, F=13.98; estimated glomerular filtration rate, F=16.11; urate, F=17.14; P<0.01). Prevalence of urolithiasis were similar among the four groups ( χ2 =2.00, P>0.05). Conclusion:The renal underexcretion type is the main type of gout. Young patients are more likely to suffer from combined type with the highest serum urate levels and the best renal function.

Objective The aim of the present study is to measure multi-directional strain in patients with hyperuricemia through 3-dimensional speckle-tracking echocardiography (3D-STE) in order to investigate the left ventricular function early changes and clinical application value of 3D-STE. Methods 3-dimension dynamic images of left ventricular full volume in Apical 4-chamber heart view was collected and stored. 3-dimensional specke-tracking technology was applied to measure and compare the left ventricular multi-directional strain of patients with hyperuricemia and healthy controls in order to evaluate the left ventricular systolic function. Results A total of 24 healthy controls and 38 patients with hyperuricemia were included into the study. Among them,patients with hyperuricemia were divided into simple hyperuricemia group(n=12), hyperuricemia complicated with hyperlipidemia group (n=16)and hyperuricemia complicated with both hyper-tension and hyperlipidemia group (n=10). The circumferential strain [(-18.8±4.4)% vs (-25.9±6.4)%, t=-3.48, P=0.001] and area strain [(-31.2±3.9)% vs (-36.8±7.1)%, t=-2.55, P=0.018] of patients with simple hyper-uricemia significantly decreased compared with healthy controls. Besides, the circumferential strain [(-19.9 ± 5.8)% vs (-25.9 ±6.4)%, t=-3.02, P=0.002], longitudinal strain [(-12.6 ±3.3)% vs (-14.4 ±2.5)%, t=-1.95, P=0.038] and area strain [(-29.9±6.6)% vs (-25.9±6.4)%, t=-3.15, P=0.001] of patients with hyperuricemia complicated with hyperlipidemia significantly decreased compared with healthy controls. Conclusion Myo-cardial strain of patients with hyperuricemia complicated with hyperlipidemia or not is both decreased, indicating a decline in left ventricular systolic function.

Objective:To understand the epidemiological characteristics of public health emergency events (PHEE) of varicella in China from 2006 to 2021 and related response performances.Methods:The data of varicella PHEE in 31 provinces of China from 2006 to 2021 were collected through the Public Health Emergency Management Information System, Microsoft Excel 2019 software and SPSS 26.0 statistical software were used to conduct descriptive epidemiological, statistical analysis on the time, area, location distribution, scale and epidemic management.Results:A total of 11 443 PHEE involving 341 048 related cases were reported from 2006 to 2021, with an annual attack rate of 1.78%-3.80% and a total attack rate of 2.33% (341 048/14 624 042). The number of PHEE and related cases of varicella decreased from 1 107 (35 349) in 2007 to 262 (6 884) in 2012 ( Z=-2.40, P<0.001), then increased year by year to 1 318 (42 649) in 2019 ( Z=2.58, P<0.001), with a significant decline since 2020. The varicella PHEE in China presents the seasonal characteristics,the peak is from April to June and from October to December, respectively. The sub-peak of varicella PHEE in eastern China generally appears 1-2 months earlier than in central and western China. Varicella PHEE reports are mainly distributed in eastern China, the attack rate is relatively high in western China, school-reported varicella PHEE was 88.26% of the total reports (10 099/11 443). The epidemic scale of varrcella PHEE typically range from 10 to 29 cases per year among the given outbreaks. The M ( Q1, Q3) of average number of cases, average duration, and average reporting interval of PHEE were 23 (16,35), 20 (14, 26) days, and 9 (5,19) days, respectively, and the reporting interval was positively correlated with the duration ( r=0.854, P<0.001). Conclusions:The varicella PHEE in China from 2006 to 2021 has not been effectively controlled. Schools are the key places to prevent and control varicella PHEE. Improving the sensitivity of varicella PHEE monitoring, strengthening the timely disposal of varicella epidemic, and promoting varicella vaccination are effective measures to prevent and control varicella PHEE.

Objective:To explore the focus of ethical governance in the field of artificial intelligence(Al)in medicine.Methods:By comprehensively reviewing relevant literature to compare the relevant laws and regulations of the field of AI in medicine between China and foreign countries,analyze the governance focus of potential ethical issues,and propose the corresponding governance strategies.Results:At present,the laws,regulations,and regulatory systems related to the field of AI in medicine in China need to be improved.The emphasis of ethical governance should focus on core issues such as protecting privacy rights,ensuring the transparency and fairness of algorithms,clarifying the demarcation and allocation of responsibilities,and clarifying public perceptions and attitudes.Conclusion:The government and all sectors of society should actively learn from international legislative experience,and build an omnidirectional and multi-level ethical governance system from the aspects of policy formulation,legal framework,scientific research,and technological research and development by strengthening top-level design,improving policies and regulations,attaching importance to public feedback,and strengthening interdisciplinary cooperation.

The great anti-epidemic spirit is a magic weapon for the Chinese people to fight against the COVID-19. Taking the Dr. Zha’s Diary of Fighting the COVID-19 as an example to explore the practical basis and scientific connotation of the great anti-epidemic spirit is of great significance for telling Chinese stories and transmitting Chinese spirit. The anti-epidemic experience described in the book reflects the professional qualities of medical staff who are people-oriented and life first in the fight against the epidemic, the overall view of respecting science and precise prevention and control by various forces in society, and the overall pattern of national unity and shared destiny in China, vividly interprets the precious connotation of the new era medical and health professional spirit.