Objective:To investigate imaging characteristics of papulopustular rosacea (PPR) by high-frequency ultrasound combined with color Doppler flow imaging.Methods:From August 2021 to August 2022, 30 patients with PPR were enrolled from the Department of Dermatology, the First Affiliated Hospital of Baotou Medical College in the Inner Mongolia Autonomous Region, and 30 healthy volunteers served as controls. The 22-MHz high-frequency ultrasound combined with color Doppler blood flow imaging was performed to measure the skin thickness, echo and blood flow parameters at the cheek, and the ultrasound results were compared between the two groups. Comparisons between groups were conducted by using t test or chi-square test. The diagnostic value was analyzed using the area under the curve (AUC) in the receiver operating characteristic (ROC) curve. Results:In the case group, there were 12 males and 18 females, and their ages ranged from 22 to 65 years (42.3 ± 12.8 years) ; in the control group, there were 10 males and 20 females, and their ages ranged from 24 to 62 years (41.0 ± 8.4 years) . The epidermal and dermal thicknesses at the cheek were significantly higher in the case group (132.64 ± 12.29 μm, 1 812.29 ± 85.52 μm, respectively) than in the control group (104.34 ± 14.45 μm, 1 671.77 ± 146.55 μm, respectively, both P < 0.05) . High-frequency ultrasound images showed that the case group was mainly characterized by irregular hypoechoic areas in the cheek dermis (80%) , while banded moderately echoic areas were common in the cheek dermis in the control group (90%) ; subepidermal low-echogenic bands and dermal irregular hypoechoic areas were more likely to appear in the case group than in the control group (93.33% vs. 43.33%, 80% vs. 10%, respectively, both P < 0.001) . Compared with the control group, the case group showed a significantly increased proportion of patients with abundant blood flow signals (93.3% vs. 10%, P < 0.05) , and significantly increased blood vessel diameters (1.60 ± 0.42 mm vs. 0.95 ± 0.32 mm, P < 0.05) ; there was no significant difference in peak systolic blood flow velocity and vascular resistance index between the two groups (both P > 0.05) . The AUC of high-frequency ultrasound combined with color Doppler flow imaging quantitative parameters (including epidermal thicknesses, dermal thicknesses, and blood vessel diameters) was 0.989 (95% CI: 0.970 - 1.000) for the diagnosis of PPR, and the sensitivity and specificity were both 96.7%, which were higher than those of single parameter-based diagnostic model. Conclusion:High-frequency ultrasound combined with color Doppler flow imaging can help improve the accuracy of the diagnosis of PPR, by accurately and non-invasively measuring skin thickness and blood flow parameters.

Background Few studies have investigated the association between air pollution and arterial stiffness in Chinese population, and the findings are inconsistent. The problem of multicollinearity exists when modeling multiple air pollutants simultaneously. Objective To investigate potential association between air quality index (AQI) and population brachial-ankle pulse wave velocity (baPWV) in Beijing. Methods This study retrieved medical examination data of 2971 participants from the Beijing Health Management Cohort, who were under 60 years old and not yet retired, from January 1, 2015 to December 31, 2019. The most recent medical examination data available were utilized for this analysis. AQI data from 35 air pollution monitoring sites in Beijing and meteorological data (including atmospheric pressure, air temperature, wind speed, and relative humidity) from 16 meteorological monitoring stations from January 1, 2014 to December 31, 2019 were collected. An average AQI exposure level for 365 d before the date of physical examination for each participant was computed using inverse distance weighting. Multiple linear regression analysis was employed to investigate the relationship between AQI and baPWV in Beijing, after adjusting for confounding variables including age, gender, body mass index, mean arterial pressure, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglycerides, fasting blood glucose, atmospheric pressure, temperature, wind speed, relative humidity, medication history of diabetes, medication history of hypertension, cardiovascular disease, education, smoking status, drinking status, and physical activity intensity. Subgroup analysis was performed by age, sex, presence of diabetes, and presence of hypertension. Results AQI demonstrated an overall decreasing trend during the study period and was lower in the northern regions and higher in the southern regions of Beijing. After adjusting the confounding variables, each 10 unit increase in AQI was associated with 6.18 (95%CI: 1.25, 11.10) cm·s⁻¹ increase in baPWV in all participants, 8.05 (95%CI: 2.32, 13.79) cm·s⁻¹ increase in the participants <50 years, 15.82 (95%CI: 8.33, 23.31) cm·s⁻¹ increase in the female group, 10.10 (95%CI: 4.66, 15.55) cm·s⁻¹ increase in the participants without diabetes, and 9.41 (95%CI: 4.21, 14.62) cm·s⁻¹ increase in the participants without hypertension. However, there was no statistically significant association observed between AQI and baPWV in the age group ≥50 years, the male group, the diabetic group, and the hypertensive group (P>0.05). Conclusion An increase in long-term AQI levels is associated with an elevation in the degree of arterial stiffness. Individuals under 50 years old, females, without hypertension or diabetes are susceptible populations to arterial stiffness when being exposed to air pollution. Improving air quality may contribute to prevent arterial stiffness.

: Objective: To investigate the effects of ezrin enhancer knockout on ezrin gene expression, cell proliferation and migration of human esophageal carcinoma Eca-109 cells. : Methods: The CRISPR/Cas9 recombinant plasmids targeting upstream/downstream of human ezrin enhancer were co-transfected into human esophageal carcinoma Eca-109 cells, and the cell line Eca-C2 with ezrin enhancer knockout was screened by purinomycin. Then the expression levels of ezrin mRNAand protein in Eca-C2 cells were detected by Real-time quantitative PCR (qPCR) and Western blotting, respectively; The expression levels of MAPK-pathway-related proteins were detected by protein array technology; and the effects of ezrin enhancer knockout on the proliferation and migration of Eca-C2 cells were analyzed by WST-1 method and wound-healing assay, respectively. : Results:The human esophageal carcinoma cell line Eca-C2 with stable ezrin enhancer knockout was established successfully. Compared with control cells, the mRNA and protein expressions of ezrin in Eca-C2 cells were significantly reduced (all P<0.05).Among the 17 detected MAPK pathway related proteins in Eca-C2 cells, 9 proteins (AKT, CREB, GSK3b, MKK6, mTOR, P38, P53, P70S6K and RSK1) were down-regulated, and the cell proliferation and migration were significantly inhibited (all P<0.05). Conclusion: ezrin enhancer knockout can significantly inhibit the cell proliferation and migration of human esophageal carcinoma Eca-109 cells.

Objective To explore the effect of telomerase reverse transcriptase(TERT) gene transfected bone marrow stem cell(BMSC)on the memory function and hippocampal CA1 region synaptic plasticity in vascular dementia rat.Methods A total of 60 rats were randomly divided into the negative control group(group A),model group(group B),conventional BMSC group(group C) and transfected BMSC group(group D).The related indicators in each group were detected by using the Morris maze test,RTPCR and Western blot respectively.Results The escape latency period in the group C and group D was significantly longer than that in the group B,which in the group D was significantly longer than that in the group C.Compared with the group A,the expressions of brain-derived neurotrophic factor(BDNF)mRNA,TERT mRNA,SYP mRNA and protein in the group B,group C and group D were significantly decreased.The synaptic cleft arrange in group A was clear with more SYN positive ceils.The synaptic cleft in the group D was clearer,and the number of SYN positive cells was close to that in group A.Conclusion TERT transfected BMSC has obvious therapeutic effect on vascular dementia rats and its mechanism may be related to the promotion of BDNF,TrkB expression and the improvement of synaptic plasticity.

OBJECTIVE:To investigate therapeutic efficacy and safety of leosimendan in the treatment of acute left heart failure (ALHF) and its effects on left ventricular function indexes and serum markers.METHODS:A total of 110 patients with acute left ventricular function selected as research objects from No.251 Hospital of PLA during Jan.2014-Dec.2015,and then were divided into control group (53 cases) and observation group (57 cases) according to random number table.Both groups received routine therapy.Control group was additionally given Dopamine hydrochloride injection or Dobutamine hydrochloride injection as cardiotonic on the basis of routine therapy.Observation group was additionally given Levosimendan injection with initial dose of 10 μg/kg+0.9％ Sodium chloride injection 50 mL,ivgtt (10 min),and then with micro pump infusion at the rate of 0.1 g/(kg· min) for continuous 24 h.Both groups were treated for continuous 7 d.Clinical efficacies of 2 groups were observed,and the levels of left ventricular function indexes (PER,PFR,LVEF,LVSF) level,serum marker (NT-proBNP) and galectin-3 (Gal-3) before and after treatment,the occurrence of ADR was recorded.RESULTS:Two cases were withdrawn from the study due to death (one case in each group).Finally,a total of 108 cases were included,involving 52 cases in control group and 56 cases in observation group.Clinical total response rate of observation group (94.64％) was higher than that of control group (86.54％),but without statistical significance (P＞0.05).Before treatment,there was no statistical significance in left ventricular function indexes or serum markers levels between 2 groups (P＞ 0.05).After treatment,the levels of left ventricular function indexes were improved significantly in 2 groups,and LVEF and LVSF of observation group were significantly higher than those of control group,with statistical significance (P＜0.05).NT-proBNP and Gal-3 of 2 groups were decreased significantly,and the observation group was significantly lower than the control group,with statistical significance (P＜0.05).No obvious ADR was found in 2 groups during treatment.CONCLUSIONS:Leosimendan in the treatment of ALHF have the similor clinical efficacy with dopamine,but helps to strengthen the left heart pump function,reduce heart failure markers levels with good safety.

Objective To investigate the clinical efficacy of ilaprazole and bismuth combined ten-day standard quadruple therapy and sequential therapy in the treatment of patients with Helicobacter pylori (H .pylori)infected chronic gastritis.Methods A total of 200 patients with H .pylori-positive chronic gastritis diagnosed by gastroendoscopy examination and rapid urease test (RUT)were randomly divided into standard quadruple therapy group and sequential therapy group,100 cases in each group.One group received ilaprazole,bismuth,amoxicillin-clavulanatepotassium and ofloxacin 10-day standard quadruple therapy, and the other group received ilaprazole, amoxicillin-clavulanatepotassium, ofloxacin and furazolidone 10-day sequential therapy.In four to six weeks after the therapy,the condition of H .pylori eradication was detected by a 14 C-urea breath test.The improvement of clinical symptoms and adverse effects were also observed. Normal distributed and variance homogenized measurement data were compared by t test,while unordered categorical data were analyzed by chi-square test and the exact probability method,and categorical data were compared by two independent sample rank sum test.Results The per-protocol analysis values of H .pylori eradication rates of the standard quadruple therapy group and the sequential therapy group were 88.54%(85/96)and 87.23%(82/94),respectively,while the intention-to-treat analysis values were 85 .00%(85/100)and 82.00%(82/100 ),respectively.The effective rates of symptomatic relief of upper abdominal pain,acid regurgitation,heart burning in the standard quadruple therapy group and the sequential therapy group were 95 .83%(92/96)and 95 .74%(90/94),respectively. The incidence of adverse effects which weve very mild was 6.25 % (6/96 ) and 7.44% (7/94 ), respectively.There was no statistically significant difference in the above three factors between the two groups (all P >0.05).Conclusions Ilaprazole and bismuth combined 10-day standard quadruple therapy and sequential therapy in the treatment of patients with H .pylori positive chronic gastritis both achieves high rates of H .pylori eradication and symptom relief with mild adverse effects.

Objective To investigate the physical fitness status of stationed on an island and the influence factors of military operational ability in order to take effective intervention measures to cope with the problems encountered by the garrison force.Methods The outdoor environment heat intensity of the island was monitored and evaluated by thermal environment monitors.The physical fitness of thirty-eight soldiers randomly selected was evaluated by measuring VO 2max. Ninety soldiers stationed on this island were selected by random sampling , for whom questionnaires and interviews were designed, involving the influence factors of military operational ability .Results This island was a typical humid-hot environment, with high temperature , high humidity and high radiation .The physical fitness of soldiers declined obviously because of the typical humid-hot environment.The top five working environmental factors were high temperature , humidity, solar radiation, wind and seasonal drying .The top five personal factors were physical fatigue , overtraining, injury, mental fatigue and lack of sleep .Conclusion Considering the obviously decreased physical fitness of soldiers caused by the typical humid-hot environment , how to assess military combat effectiveness and how to determine whether the level of combat effectiveness can meet the actual needs of tropical combat , requires scientific indicators and criteria of evaluation .

Objective To investigate the morbidity of soldiers stationed on an island ,analyze the relationship betweendiseases and the environment,and to provide an effective method for disease prevention and treatment .Method Data ofoutpatients from troops stationed on an island between September 2012 and August 2013 were statistically investigatedaccording to the classification of diseases.The cause of disease was analyzed .In addition,90 soldiers stationed on an islandwere randomly selected to investigate their response to heat and humidity and parts susceptible to skin diseases viaquestionnaires and talks.Results A total of 789 cases of disease were identified,including 226 cases of upper respiratorytract infection,118 cases of orthopedic-related diseases,90 cases of traumatic diseases,88 cases of oral diseases,74 casesof digestive system diseases,62 cases of skin diseases,53 cases of ENT diseases,41 cases of urinary tract infection,and37 cases of anorectal diseases.The top five responses to heat and humidity were sweating,thirst,body fatigue,dizzinessand profuse sweating.The most susceptible part to skin diseases was the feet ,followed by the cheek,crotch,back andneck.Conclusion The epidemiological characteristics of diseases on this island are significant,and medical supportshould be focused on improving the overall level of hospital treatment.

Objective To investigate the effect of aerosol inhalation of high-dose glucocor-ticoids on children with asthma at acute attack stage.Methods Ninety-three asthmatic children re-ceived in our hospital were randomly divided into treatment group (48 cases)and control group (45 cases).Both groups were given routine treatment like oxygen uptake.Besides,the treatment group was treated with aerosol inhalation of high-dose glucocorticoids and ipratropium bromide,while the control group was given glucocorticoid tablets and routine inhalation of ipratropium bromide.Before and 1 h after treatment,the heart rate (HR),respiratory rate (RR),forced expiratory volume in 1 second (FEV1),peak expiratory flow (PEF)and SpO2 of children in both groups were strictly monitored,clinical efficacies were compared and adverse reactions were observed.Results The overall response rate of treatment group (9 7 .9 % )was significantly higher than control group (82.2%)(P <0.05),with statistical significant difference.Compared with treatment before,the HR and RR slowed down markedly,FEV1 and PEF were improved and SpO2 increased obviously in both groups 1 h after treatment,in which the improved degrees of all the above indexes in treatment group were superior to control group ,with statistical significant differences (P < 0 .0 5 ,or P <0.01).The total incidence rate of adverse reactions was 12.5% (6 /48)and the total incidence rate of control group was 17.8% (8 /45),and there were no significant differences between 2 groups (P>0.05).Conclusion For the asthmatic children at acute attack stage,aerosol inhalation of high-dose glucocorticoids and ipratropium bromide can rapidly alleviate symptoms,ameliorate the lung function and elevate SpO2,with milder adverse reactions.

Objective To investigate the effect of aerosol inhalation of high-dose glucocor-ticoids on children with asthma at acute attack stage.Methods Ninety-three asthmatic children re-ceived in our hospital were randomly divided into treatment group (48 cases)and control group (45 cases).Both groups were given routine treatment like oxygen uptake.Besides,the treatment group was treated with aerosol inhalation of high-dose glucocorticoids and ipratropium bromide,while the control group was given glucocorticoid tablets and routine inhalation of ipratropium bromide.Before and 1 h after treatment,the heart rate (HR),respiratory rate (RR),forced expiratory volume in 1 second (FEV1),peak expiratory flow (PEF)and SpO2 of children in both groups were strictly monitored,clinical efficacies were compared and adverse reactions were observed.Results The overall response rate of treatment group (9 7 .9 % )was significantly higher than control group (82.2%)(P <0.05),with statistical significant difference.Compared with treatment before,the HR and RR slowed down markedly,FEV1 and PEF were improved and SpO2 increased obviously in both groups 1 h after treatment,in which the improved degrees of all the above indexes in treatment group were superior to control group ,with statistical significant differences (P < 0 .0 5 ,or P <0.01).The total incidence rate of adverse reactions was 12.5% (6 /48)and the total incidence rate of control group was 17.8% (8 /45),and there were no significant differences between 2 groups (P>0.05).Conclusion For the asthmatic children at acute attack stage,aerosol inhalation of high-dose glucocorticoids and ipratropium bromide can rapidly alleviate symptoms,ameliorate the lung function and elevate SpO2,with milder adverse reactions.