1.Trends in the incidence and mortality of rheumatoid arthritis in China from 1990 to 2021: An age-period-cohort analysis.
Xuewei DOU ; Wenfei CUI ; Zhenzhen HAN ; Zhiying CHE ; Xiaobing LI ; Hongtao GUO
Journal of Central South University(Medical Sciences) 2025;50(7):1214-1223
OBJECTIVES:
Rheumatoid arthritis (RA) imposes a heavy burden on individuals, families, and society. This study analyzed the incidence and mortality trends of RA in China from 1990 to 2023 to provide epidemiological evidence for precise prevention and control.
METHODS:
Data on RA incidence, age-standardized incidence rate (ASIR), deaths, and age-standardized mortality rate (ASMR) in China by sex and age group from 1900 to 2021 were extracted from the Global Burden of Disease (GBD) 2021 database. Joinpoint regression was used to analyze trends in ASIR and ASMR. An age-period-cohort model was constructed using R4.3.1 to evaluate longitudinal age trends and estimate relative risk (RR) values for period and cohort effects.
RESULTS:
In 2021, the number of RA cases, ASIR, deaths, and ASMR in China were 247 300, 13.70 per 100 000, 10 300, and 0.54 per 100 000, respectively. From 1990 to 2021, the ASIR of RA increased annually among both females and males, with average annual percentage changes (AAPCs) of 0.44% and 0.72%, respectively. Over the same period, ASMR declined in the total population and among females, with AAPCs of -0.78% and -1.19%, while the change in males was not statistically significant. Age-period-cohort analysis showed that the peak incidence occurred in women aged 60-64 years and men aged 75-79 years, and mortality increased with age. The period effect for incidence rose in both sexes, reaching 1.10 [95% confidence interval (CI) 0.94 to 1.27] for females and 1.14 (95% CI 1.02 to 1.27) for males during 2017 to 2021, compared with 2002 to 2006. The mortality period effect RR exhibited a downward-upward-downward pattern, decreasing to 0.56 (95% CI 0.52 to 0.61) in females and 0.75 (95% CI 0.68 to 0.82) in males in 2017 to 2021. Cohort analysis indicated that the highest incidence risk occurred in individuals born during 2012 to 2016, while the cohort effect RR for female RA mortality showed a continuous decline beginning with the 1922 to 1926 birth cohort.
CONCLUSIONS
The incidence and mortality risks of RA in China have continued to decline. However, with the aging of the population, the incidence and mortality risks among the elderly have increased. Middle-aged women and elderly men should receive focused attention. Health authorities should strengthen education, prevention, and screening among middle-aged women and enhance disease monitoring in elderly populations to reduce the national burden of RA.
Humans
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China/epidemiology*
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Arthritis, Rheumatoid/epidemiology*
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Incidence
;
Male
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Female
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Middle Aged
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Adult
;
Aged
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Cohort Studies
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Mortality/trends*
;
Age Distribution
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Age Factors
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Aged, 80 and over
;
Adolescent
2.Reported incidence rate of pulmonary tuberculosis and diagnosis and treatment of pulmonary tuberculosis patients in Jing’an District, Shanghai from 2018 to 2023
Jing YAO ; Zhihong LI ; Huaiqing ZHANG ; Zhiying HAN ; Kaikan GU
Shanghai Journal of Preventive Medicine 2025;37(10):826-829
ObjectiveTo analyze the reported incidence rate of pulmonary tuberculosis and diagnosis and treatment of pulmonary tuberculosis patients in Jing’an District, Shanghai from 2018 to 2023, and to provide a reference basis for the prevention and treatment of pulmonary tuberculosis. MethodsMedical records, including demographic information, diagnosis and treatment information, laboratory testing results, treatment outcomes, patient prognoses, and etc., of all the patients registered for first-time management, with the disease type of pulmonary tuberculosis in Jing’an District from January 1, 2018 to December 31, 2023 were extracted from the Tuberculosis Management Information System of China’s Disease Control and Prevention Information System.The reported incidence rate of pulmonary tuberculosis from 2018 to 2023 was analyzed. Additionally, the delay rate for medical consultation, diagnostic delay rate, prevalence of pulmonary cavity, rate of sputum smear-positive, sputum conversion rate of smear-positive patients after 2 months, proportion of deaths attributable to pulmonary tuberculosis or other causes, and the proportion of patients with treatment duration >1 year in 2018‒2019, 2020‒2022, and 2023 were compared, respectively. ResultsA total of 1 378 pulmonary tuberculosis patients were registered for management in Jing’an District in 2018‒2023, with a reported incidence rate of 25.97/100 000, 25.72/100 000, 23.93/100 000, 22.36/100 000, 18.18/100 000, and 22.32/100 000, respectively. Meanwhile, the overall reported incidence rates in 2018‒2019, 2020‒2022, and 2023 were 25.84/100 000, 21.53/100 000, and 22.32/100 000, respectively. The median age of the patients was 56 (33, 67) years, with a male-to-female ratio of 1.94∶1. The patients with a household registration of Shanghai accounted for 70.75%, among whom those aged between 61‒<71 years were the majority. Whereas, those aged between 31‒<41 years accounted for a higher proportion in the long-term resident population. The median delay times of patient’s medical consultation, diagnosis, and case-finding were 25 (19, 33) days, 29 (21, 43) days, and 41 (32, 66) days, respectively. The delay rate for medical consultation was higher in 2020‒2022 (47.99%) and 2023 (46.89%), but lower in 2018‒2019 (31.02%). In 2018‒2019, 2020‒2022, and 2023, the diagnostic delay rate was 12.41% (68/548), 13.53% (84/621), and 16.75% (35/209), respectively. Besides, during the same time the delay rate in case-finding was 19.53%, 27.05% and 34.45%, respectively, all exhibited an increasing trend. Furthermore, the rate of patients with pulmonary cavity was 16.06%, 14.98%, and 11.00%, respectively, showing a decreasing trend. Furthermore, the rate of sputum smear-positive was 27.19%, 33.33% and 32.54%, while the sputum conversion rate of smear-positive patients after 2 months was 81.21%, 85.02% and 89.71%. The mortality rates due to tuberculosis and other causes were 3.10%, 5.64%, and 3.83%, respectively. The proportion of patients with a treatment duration of ≥365 days was 44.27% in 2018‒2019, 39.93% in 2020‒2022 and 26.60% in 2023. ConclusionThe overall reported incidence rate of pulmonary tuberculosis in Jing’an District showed a decline trend from 2018‒2022, with a slight rebound in 2023. Targeted interventions should be prioritized for the elderly with local household registration and young permanent residents without Shanghai household registration.
3.Analysis of the efficacy of adjusting the dose of imatinib with therapeutic drug monitoring in adjuvant treatment after complete resection of gastrointestinal stromal tumors
Zhiliang CHEN ; Hongkun TIAN ; Jianing DING ; Zhiying LI ; Gan MAO ; Yuqiang DU ; Qian SHEN ; Hong ZHOU ; Yong HAN ; Xiangyu ZENG ; Kaixiong TAO ; Peng ZHANG
Chinese Journal of Gastrointestinal Surgery 2024;27(11):1148-1154
Objective:To explore the efficacy of adjusting the dose of imatinib dose in the context of therapeutic drug monitoring (TDM) in patients with gastrointestinal stromal tumors (GISTs) who are receiving adjuvant therapy after complete resection of their tumors.Methods:This was a descriptive study. Inclusion criteria were (1) complete surgical resection with a pathological diagnosis of GIST, (2) postoperative adjuvant therapy with imatinib and dosage adjustment, (3) multiple TDM of imatinib, and (4) complete clinical, pathological, and follow-up data. The data of 70 patients with GISTs treated at Union Hospital, Tongji Medical College, Huazhong University of Science and Technology between January 2015 and December 2023 were collected retrospectively. The study cohort comprised 15 (21.4%) men and 55 (78.6%) women of median age 60 years (range: 25–82). Of the eligible patients, 49 (70.0%) were at high-risk, 14 (20.0%) at intermediate-risk, six (8.6%) at low-risk, and one (1.4%) at very low risk. Patients were followed up by the gastrointestinal stromal tumor clinic every 2–3 months and their plasma concentrations of imatinib were checked. The dose was adjusted to 300 mg/d or 200 mg/d depending on whether they had had ≥ grade III adverse reactions, and whether the first plasma concentration of imatinib was ≥ 1,500 μg/L or between the expected range of 760 μg/L–1,100 μg/L. Studied indicators included adverse reactions, quality of life before and after dose adjustment, and overall survival and recurrence-free survival (RFS) after dose adjustment.Results:Before dose adjustment, all 70 patients received 400 mg of imatinib daily, with initial TDM values of 1,900 ± 568 μg/L, for a median duration of 8.3 months. After dose adjustment, 60 patients received 300 mg daily, with a TDM of 1,216 ± 350 μg/L, whereas 10 received 200 mg daily, with a TDM of 1,023 ± 269 μg/L. The median duration of treatment after dose adjustment was 23.4 months. Compared with those whose dosages were not adjusted, the incidence of bone marrow suppression was significantly lower (74.3% [52/70] vs. 51.4% [36/70], χ 2=9.202, P=0.010); as were the incidences of edema (95.7% [67/70] vs. 50.0% [35/70], χ 2=40.526, P<0.001); skin reactions (70.0% [49/70] vs. 32.9% [23/70), χ 2=22.495, P<0.001); and gastrointestinal reactions (38.6% [27/70] vs. 10.0% [7/70], χ 2=15.899, P<0.001) in those whose dosages were adjusted. The average total scores for physical health before and after dose adjustment were 76 ± 5 and 88 ± 4, respectively; whereas the mental health scores were 75 ± 6 and 89 ± 4, respectively. The median follow-up period was 36 months (range 6–126). During the first 3 years of follow-up, five high-risk patients with non-gastric GISTs developed recurrences. The 3-year overall survival rate was 100%, and the 3-year RFS rate was 92.8%, high-risk patients having a 3-year RFS rate of 89.8%. Conclusion:The adverse reactions and quality of life of GIST patients with severe adverse reactions to adjuvant imatinib therapy after complete resection can be mitigated by appropriately reducing the dosage of imatinib under the guidance of TDM.
4.Clinical characteristics of 41 patients with mpox
Mei ZHANG ; Fang PENG ; Benyong YAN ; Yuan FANG ; Lin JIA ; Han JIA ; Luyao ZHENG ; Zhiying LIU ; Wen WANG ; Xiaojie HUANG ; Tong ZHANG
Chinese Journal of Infectious Diseases 2024;42(4):210-213
Objective:To analyze and summarize the clinical characteristics of mpox patients, thereby to rise clinicians′ awareness of severe mpox and provide a foundation for clinical diagnosis and treatment.Methods:The clinical data were retrospectively analyzed in 41 mpox patients treated at the Beijing You′an Hospital, Capital Medical University, from June to November 2023. Patients were categorized into mild and severe cases based on clinical manifestations, and laboratory results of the two groups were compared. Statistical analysis was performed using the Mann-Whitney U test. Results:The clinical manifestations of 41 mpox patients mainly included fever, rash and lymphadenopathy. Five patients with severe mpox might develop serious complications, including bacterial pneumonia, type Ⅰ respiratory failure, fungal infections, penile or perianal dry gangrene, penile soft tissue edema, intestinal obstruction, septic shock, perianal abscess, and necrotizing fasciitis. Patients with severe mpox had significantly higher white blood cell count (WBC), neutrophil count and C-reactive protein (CRP) level compare to those with mild cases (14.60(9.92, 24.08)×10 9/L vs 6.41(5.64, 8.37)×10 9/L, 12.43(7.02, 21.15)×10 9/L vs 3.35(2.46, 5.03)×10 9/L, 108.20(56.20, 124.10) mg/L vs 16.6(6.25, 49.98) mg/L), while the albumin level and CD4 + T lymphocyte count in the severe group were significantly lower compared to the mild cases (31.80(22.90, 35.15) g/L vs 44.70(42.90, 47.40) g/L, 24.00(12.00, 81.50)/μL vs 606.00(414.50, 767.50)/μL)). All these differences were statistically significant ( U=2.81, 3.02, 2.98, 3.56 and 3.26, respectively, all P<0.01). Conclusions:In clinical practice, clinicians should be vigilant for the possibility of severe mpox if patients exhibit a significant increase of WBC and CRP, a significant decrease in CD4 + T lymphocyte count, or if they develop severe complications.
5.Effect of individualized exercise intervention on weight loss and improvement of metabolic indexes in individuals with metabolic syndrome
Zhengfang WANG ; Fengxu ZHANG ; Xu ZOU ; Zhiying SUN ; Han ZHANG
Chinese Journal of Health Management 2024;18(5):361-365
Objective:To analyze the effect of individualized exercise intervention on weight loss and improvement of metabolic indexes in individuals with metabolic syndrome (MS).Methods:This study was a randomized controlled trial. A total of 1 200 MS patients who underwent health examinations in the Beijing Aerospace General Hospital Healthy Management Center from 2019 to 2022 were selected as the research subjects. The patients were randomly divided into the experimental group (600 cases) and the control group (600 cases) by random number table. Based on the patient′s physical fitness data, a 3-month personalized exercise intervention was implemented for the experimental group, which included aerobic exercise 3 to 4 times/week combined with resistance exercise≥2 times/week, and MS-related health examinations were given too. The control group only received physical examination. Paired t-test was used to compare the changes in weight and metabolic-related indicators before and after the intervention in the two groups. Two-sample t-test was used to compare the differences in intervention effects between groups. The effect of personalized exercise intervention on weight loss and improvement of metabolic indicators in the MS population was analyzed. Results:After the intervention, the weight, body mass index, waist-to-hip ratio, resting heart rate, systolic blood pressure, diastolic blood pressure, fasting glucose, low-density lipoprotein, total cholesterol esters, and triglyceride levels in the experimental group were all significantly lower than those before [(72.5±12.9) vs (74.2±13.6) kg, (27.3±3.5) vs (27.9±3.5) kg/m2, 0.87±0.08 vs 0.91±0.08, (71±7) vs (74±9) times/min, (131±11) vs (138±14) mmHg (1 mmHg=0.133 kPa), (80±8) vs (85±9) mmHg, (6.0±1.1) vs (6.9±1.6) mmol/L, (2.78±0.78) vs (3.12±0.77) mmol/L, (4.62±1.04) vs (5.22±0.97) mmol/L, (1.36±0.42) vs (2.59±2.01) mmol/L], but the high-density lipoprotein level was significantly higher than that before [(1.31±0.31) vs (1.27±0.29) mmol/L] (all P<0.05). The weight, body mass index, waist-to-hip ratio, systolic blood pressure, low-density lipoprotein, total cholesterol esters, and triglyceride levels after the intervention in the control group were all significantly higher than those before [(68.1±5.9) vs (67.1±5.9) kg, (25.3±2.4) vs (24.9±2.4) kg/m2, 0.83±0.07 vs 0.82±0.06, (127±12) vs (125±12) mmHg, (3.50±1.45) vs (3.20±1.21) mmol/L, (5.50±1.80) vs (5.30±1.52) mmol/L, (1.59±0.82) vs (1.40±0.65) mmol/L], but the high-density lipoprotein level was significantly lower than that before the intervention [(1.28±0.28) vs (1.38±0.28) mmol/L] (all P<0.05). The intervention effects on weight, body mass index, waist-to-hip ratio, heart rate, systolic blood pressure, diastolic blood pressure, glucose, high-density lipoprotein, low-density lipoprotein, total cholesterol and triglycerides levels in the experimental group were all significantly better than those in the control group [(-1.4±13.3) vs (1.0±5.9) kg, (-0.6±3.5) vs (0.4±2.4) kg/m2, -0.04±0.08 vs 0.01±0.06, (-3±8) vs (0±7) times/min, (-7±12) vs (2±12) mmHg, (-5±9) vs (0±8) mmHg, (-0.9±1.4) vs (0±0.5) mmol/L, (0.04±0.30) vs (-0.10±0.28) mmol/L, (-0.34±0.77) vs (0.30±1.34) mmol/L, (-0.60±1.00) vs (0.20±1.66) mmol/L, (-1.23±1.45) vs (0.19±0.74) mmol/L ] (all P<0.001). Conclusion:Individualized exercise intervention can effectively promote weight loss and improve metabolic-related indicators in MS patients.
6.Progress on the pathogenicity of non-vaccine type Streptococcus pneumoniae in children
International Journal of Pediatrics 2024;51(1):49-53
Streptococcus pneumoniae infection is a common respiratory disease in children. Globally,invasive pneumococcal disease(IPD),which is caused by Streptococcus pneumoniae infection,is one of the leading causes of death in children. The use of Streptococcus pneumoniae vaccine has provided protection for children to some extent,but the prevalence of pathogenic and drug-resistant non-vaccine type(NVT)Streptococcus pneumoniae poses a grave threat to children's health. Due to the different use of vaccines and antibiotics in different regions,there are regional variations in the NVT distribution. This paper reviews the pathogenic process of Streptococcus pneumoniae,the mechanism of NVT production,the geographical distribution and the pathogenic condition of NVT,in order to fully understand the pathogenicity and harm of NVT,to provide data support for the adjustment of health strategy,and to provide reference for clinical diagnosis and treatment and future vaccine development and use.
7.Analysis of the efficacy of adjusting the dose of imatinib with therapeutic drug monitoring in adjuvant treatment after complete resection of gastrointestinal stromal tumors
Zhiliang CHEN ; Hongkun TIAN ; Jianing DING ; Zhiying LI ; Gan MAO ; Yuqiang DU ; Qian SHEN ; Hong ZHOU ; Yong HAN ; Xiangyu ZENG ; Kaixiong TAO ; Peng ZHANG
Chinese Journal of Gastrointestinal Surgery 2024;27(11):1148-1154
Objective:To explore the efficacy of adjusting the dose of imatinib dose in the context of therapeutic drug monitoring (TDM) in patients with gastrointestinal stromal tumors (GISTs) who are receiving adjuvant therapy after complete resection of their tumors.Methods:This was a descriptive study. Inclusion criteria were (1) complete surgical resection with a pathological diagnosis of GIST, (2) postoperative adjuvant therapy with imatinib and dosage adjustment, (3) multiple TDM of imatinib, and (4) complete clinical, pathological, and follow-up data. The data of 70 patients with GISTs treated at Union Hospital, Tongji Medical College, Huazhong University of Science and Technology between January 2015 and December 2023 were collected retrospectively. The study cohort comprised 15 (21.4%) men and 55 (78.6%) women of median age 60 years (range: 25–82). Of the eligible patients, 49 (70.0%) were at high-risk, 14 (20.0%) at intermediate-risk, six (8.6%) at low-risk, and one (1.4%) at very low risk. Patients were followed up by the gastrointestinal stromal tumor clinic every 2–3 months and their plasma concentrations of imatinib were checked. The dose was adjusted to 300 mg/d or 200 mg/d depending on whether they had had ≥ grade III adverse reactions, and whether the first plasma concentration of imatinib was ≥ 1,500 μg/L or between the expected range of 760 μg/L–1,100 μg/L. Studied indicators included adverse reactions, quality of life before and after dose adjustment, and overall survival and recurrence-free survival (RFS) after dose adjustment.Results:Before dose adjustment, all 70 patients received 400 mg of imatinib daily, with initial TDM values of 1,900 ± 568 μg/L, for a median duration of 8.3 months. After dose adjustment, 60 patients received 300 mg daily, with a TDM of 1,216 ± 350 μg/L, whereas 10 received 200 mg daily, with a TDM of 1,023 ± 269 μg/L. The median duration of treatment after dose adjustment was 23.4 months. Compared with those whose dosages were not adjusted, the incidence of bone marrow suppression was significantly lower (74.3% [52/70] vs. 51.4% [36/70], χ 2=9.202, P=0.010); as were the incidences of edema (95.7% [67/70] vs. 50.0% [35/70], χ 2=40.526, P<0.001); skin reactions (70.0% [49/70] vs. 32.9% [23/70), χ 2=22.495, P<0.001); and gastrointestinal reactions (38.6% [27/70] vs. 10.0% [7/70], χ 2=15.899, P<0.001) in those whose dosages were adjusted. The average total scores for physical health before and after dose adjustment were 76 ± 5 and 88 ± 4, respectively; whereas the mental health scores were 75 ± 6 and 89 ± 4, respectively. The median follow-up period was 36 months (range 6–126). During the first 3 years of follow-up, five high-risk patients with non-gastric GISTs developed recurrences. The 3-year overall survival rate was 100%, and the 3-year RFS rate was 92.8%, high-risk patients having a 3-year RFS rate of 89.8%. Conclusion:The adverse reactions and quality of life of GIST patients with severe adverse reactions to adjuvant imatinib therapy after complete resection can be mitigated by appropriately reducing the dosage of imatinib under the guidance of TDM.
8.The role of Huaiqihuang Granules in the long-term management of bronchial asthma in young children: a multicenter real-world study
Huimin WANG ; Jinghui MU ; Chuanhe LIU ; Changshan LIU ; Ying WANG ; Zhiying HAN ; Xin SUN ; Xing CHEN ; Shuhua AN ; Dolikon MUZAPAR ; Aiping LU ; Min WANG ; Yan CHENG ; Xiaomei YIN ; Hanmin LIU ; Hong WANG ; Shan HUA ; Li DONG ; Ying HUANG ; Yi JIANG ; Jianxin XIONG ; Shenggang DING ; Wei WANG ; Shunying ZHAO ; Yuzhi CHEN
Chinese Journal of Applied Clinical Pediatrics 2023;38(4):286-290
Objective:To observe the role of Huaiqihuang Granules (HQ) in the long-term management of bronchial asthma in young children, and the effective effect on concomitant rhinitis.Methods:A prospective real-world multicenter study was conducted in children aged 2-5 years with asthma diagnosed in the outpatient department (from April 2016 to March 2019)who received either inhaled corticosteroid (ICS)/leukotriene receptor antagonist (LTRA)(control group); inhaled ICS/LTRA plus HQ(combination group), or HQ alone(HQ group). All patients were followed up at week 4, 8, 12 after treatment. The number of days with asthma symptoms, the frequency of severe asthma attacks, the level of asthma control, and the days with rhinitis symptoms in the last 4 weeks were recorded. Differences before and after treatment, and those among groups after treatment were compared using Kruskal- Wallis H test or Wilcoxon rank-sum test. Results:A total of 2 234 eligible patients were recruited, and 2 147 cases completed followed-up visits, including 477, 1 374 and 296 cases in the control group, combination group, and HQ group, respectively. After the treatment, all 3 groups showed significant declines in the days with asthma symptoms, frequency of severe asthma attack and the days with rhinitis symptoms (all P<0.01), and the rate of well-controlled asthma increased significantly ( P<0.01). It lasted until the end of follow-up. Among groups, patients in the combination group showed significantly less days of asthma symptoms than those of the other 2 group at week 8 and 12[0(0, 0.9) d vs.0(0, 0.3) d, P<0.05; 0(0, 0.1) d vs. 0(0, 1.0) d, P<0.01]. Patients in the combination group and HQ group showed a significantly lower rate of severe asthma attacks than that of the control group at week 12 [0(0, 1), 0(0, 1), 0(0, 2), all P<0.05]. The well-controlled rate of asthma in the combination group was significantly higher than that of the control group and HQ group at week 8 and 12 (89.6% vs. 85.9% vs.82.1%, H=15.28; 90.9% vs. 84.1% vs. 81.8%, χ2=29.32, all P<0.01). Conclusions:HQ can significantly alleviate symptoms of asthma and rhinitis, severe attack of asthma, and increase the control rate of asthma when used as an additional treatment or used alone.
9.Application of scenario simulation teaching model of multimorbidity co-treatment in standardized training for general practice residents
Zhiying TONG ; Xiaolong CHENG ; Yi ZHANG ; Yan SHANG ; Yiping HAN
Chinese Journal of General Practitioners 2023;22(5):520-523
From February 1 to April 30, 2021, 48 general practice resident physicians in the First Affiliated Hospital of Naval Medical University were randomly divided into study group and control group with 24 in each group. The common comorbidities of the community-dwelling elderly, namely diabetes, diabetic retinopathy and osteoporosis were selected as teaching cases. The residents in control group received conventional teaching, while the scenario simulation teaching model of multicomorbity co-treatment was applied for the study group. The teaching effect, satisfaction and self-efficacy scores were compared between two groups. After training, the knowledge levels, the mastery of referral indicators and the performance of fundus ophthalmoscopy in the study group were significantly better than those in the control group ( t=2.27, 6.34, 4.09; P<0.05). They were (80.96±11.27) vs. (73.96±10.09), (10.33±2.41) vs. (6.38±1.88), (70.27±10.44) vs. (63.50±7.98), and students′ satisfaction and self-efficacy evaluation were higher than those of the observation group (all P<0.05). It is suggested that the simulation teaching of multi-disease co-treatment scenario is more beneficial than the traditional teaching to improve the comprehensive care ability of standardized training physicians in general practice for patients with chronic disease.
10.A novel CRISPR/Cas9-hLacI donor adapting system for dsDNA-templated gene editing.
Baoxia MA ; Jieyu CUI ; Hongrun QIAN ; Xiaojun ZHANG ; Sen YANG ; Qijing ZHANG ; Yifan HAN ; Zhiying ZHANG ; Jiangang WANG ; Kun XU
Chinese Journal of Biotechnology 2023;39(10):4204-4218
During the gene editing process mediated by CRISPR/Cas9, precise genome editing and gene knock-in can be achieved by the homologous recombination of double-stranded DNA (dsDNA) donor template. However, the low-efficiency of homologous recombination in eukaryotic cells hampers the development and application of this gene editing strategy. Here, we developed a novel CRISPR/Cas9-hLacI donor adapting system (DAS) to enhance the dsDNA-templated gene editing, taking the advantage of the specific binding of the LacI repressor protein and the LacO operator sequence derived for the Escherichia coli lactose operon. The codon-humanized LacI gene was fused as an adaptor to the Streptococcus pyogenes Cas9 (SpCas9) and Staphylococcus lugdunensis Cas9 (SlugCas9-HF) genes, and the LacO operator sequence was used as the aptamer and linked to the dsDNA donor template by PCR. The Cas9 nuclease activity after the fusion and the homology-directed repair (HDR) efficiency of the LacO-linked dsDNA template were firstly examined using surrogate reporter assays with the corresponding reporter vectors. The CRISPR/Cas9-hLacI DASs mediated genome precise editing were further checked, and we achieved a high efficiency up to 30.5% of precise editing at the VEGFA locus in HEK293T cells by using the CRISPR/SlugCas9-hLacI DAS. In summary, we developed a novel CRISPR/Cas9-hLacI DAS for dsDNA-templated gene editing, which enriches the CRISPR/Cas9-derived gene editing techniques and provides a novel tool for animal molecular design breeding researches.
Humans
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Animals
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Gene Editing
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CRISPR-Cas Systems/genetics*
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HEK293 Cells
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Homologous Recombination
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DNA

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