1.Exploring Intervention Effect of Atractylodis Macrocephalae Rhizoma Processed with Aurantii Fructus Immaturus Juice on Slow-transit Constipation and Its "Microbiota-Metabolism" Synergistic Regulation Mechanism Based on Theory of "Spleen Governing Transportation and Transformation"
Dan LI ; Xiaoxia LIU ; Xiaofen WANG ; Zuxin HE ; Junnan WEI ; Yanqing LIU ; Yuxuan GAO ; Ping LUO ; Fang WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):201-209
ObjectiveBased on the theory of "spleen governing transportation and transformation", this study investigates the efficacy of Atractylodis Macrocephalae Rhizoma processed with Aurantii Fructus Immaturus juice(AMR-AFI) in improving slow-transit constipation(STC), as well as the synergistic regulatory mechanism involving the microbiota-metabolism axis, thereby elucidating the scientific basis of its processing theory. MethodsAnimals were randomly divided into the control group, model group, positive drug(mosapride) group(3 mg·kg-1), and low-, medium-, and high-dose groups of AMR-AFI(3.9, 7.8, 15.6 g·kg-1). Except for the control group, the remaining five groups were induced with STC using loperamide hydrochloride. Following modeling, interventions were administered. All groups received continuous administration for 15 d, during which fecal samples, colon tissue, and serum were collected. Constipation improvement was assessed by measuring fecal moisture content and small intestinal propulsion rate, histological morphology of colonic tissue was observed via hematoxylin-eosin(HE) staining, and the levels of interleukin(IL)-6, tumor necrosis factor(TNF)-α, and IL-2 in serum were detected using enzyme-linked immunosorbent assay(ELISA). Furthermore, the microbial community structure in mouse feces was analyzed by 16S rRNA sequencing, while transcriptomic sequencing was employed to screen differentially expressed genes in colonic tissue, followed by gene ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analyses. Finally, Spearman correlation analysis was conducted to explore the association between differential microbiota and differential genes. ResultsCompared with the control group, the intestinal propulsion rate and fecal moisture content in the model group were significantly decreased(P<0.01), while serum levels of IL-6, TNF-α, and IL-2 were significantly elevated(P<0.01). HE staining showed damage and shedding of colonic mucosal epithelial cells, along with a reduction in goblet cells in the model group. In comparison with the model group, all treatment groups improved the pathological state of the colonic mucosa to varying degrees and reduced serum levels of IL-6, TNF-α, and IL-2(P<0.01). Among these, the high-dose group of AMR-AFI significantly increased the intestinal propulsion rate and fecal moisture content of rats(P<0.05, P<0.01). Further transcriptomic analysis revealed that a total of 104 differentially expressed genes were identified from comparisons between the model group and the control group, as well as between the model group and the high-dose group of AMR-AFI. These genes were mainly enriched in pathways closely related to STC pathogenesis, such as arachidonic acid metabolism and aldosterone-regulated sodium reabsorption. 16S rRNA sequencing results indicated that AMR-AFI reversed the structural imbalance of the gut microbiota in model mice, increased species richness, downregulated the relative abundance of pro-inflammatory bacteria such as Parasutterella, and enriched beneficial and butyrate-producing bacteria, including Lachnospiraceae_NK4A136_group, Ruminococcaceae, and Lachnospiraceae. Spearman correlation analysis further showed that the beneficial bacteria enriched in the AMR-AFI group were negatively correlated with genes involved in the arachidonic acid metabolic pathway and positively correlated with genes in the aldosterone-regulated sodium reabsorption pathway. In contrast, pro-inflammatory bacteria in the model group exhibited the opposite correlation trends. ConclusionAMR-AFI can effectively exert synergistic therapeutic effects on STC by regulating intestinal microbiota, arachidonic acid-mediated inflammatory metabolism, and aldosterone-regulated water-salt balance pathways.
2.Exploring Intervention Effect of Atractylodis Macrocephalae Rhizoma Processed with Aurantii Fructus Immaturus Juice on Slow-transit Constipation and Its "Microbiota-Metabolism" Synergistic Regulation Mechanism Based on Theory of "Spleen Governing Transportation and Transformation"
Dan LI ; Xiaoxia LIU ; Xiaofen WANG ; Zuxin HE ; Junnan WEI ; Yanqing LIU ; Yuxuan GAO ; Ping LUO ; Fang WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):201-209
ObjectiveBased on the theory of "spleen governing transportation and transformation", this study investigates the efficacy of Atractylodis Macrocephalae Rhizoma processed with Aurantii Fructus Immaturus juice(AMR-AFI) in improving slow-transit constipation(STC), as well as the synergistic regulatory mechanism involving the microbiota-metabolism axis, thereby elucidating the scientific basis of its processing theory. MethodsAnimals were randomly divided into the control group, model group, positive drug(mosapride) group(3 mg·kg-1), and low-, medium-, and high-dose groups of AMR-AFI(3.9, 7.8, 15.6 g·kg-1). Except for the control group, the remaining five groups were induced with STC using loperamide hydrochloride. Following modeling, interventions were administered. All groups received continuous administration for 15 d, during which fecal samples, colon tissue, and serum were collected. Constipation improvement was assessed by measuring fecal moisture content and small intestinal propulsion rate, histological morphology of colonic tissue was observed via hematoxylin-eosin(HE) staining, and the levels of interleukin(IL)-6, tumor necrosis factor(TNF)-α, and IL-2 in serum were detected using enzyme-linked immunosorbent assay(ELISA). Furthermore, the microbial community structure in mouse feces was analyzed by 16S rRNA sequencing, while transcriptomic sequencing was employed to screen differentially expressed genes in colonic tissue, followed by gene ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analyses. Finally, Spearman correlation analysis was conducted to explore the association between differential microbiota and differential genes. ResultsCompared with the control group, the intestinal propulsion rate and fecal moisture content in the model group were significantly decreased(P<0.01), while serum levels of IL-6, TNF-α, and IL-2 were significantly elevated(P<0.01). HE staining showed damage and shedding of colonic mucosal epithelial cells, along with a reduction in goblet cells in the model group. In comparison with the model group, all treatment groups improved the pathological state of the colonic mucosa to varying degrees and reduced serum levels of IL-6, TNF-α, and IL-2(P<0.01). Among these, the high-dose group of AMR-AFI significantly increased the intestinal propulsion rate and fecal moisture content of rats(P<0.05, P<0.01). Further transcriptomic analysis revealed that a total of 104 differentially expressed genes were identified from comparisons between the model group and the control group, as well as between the model group and the high-dose group of AMR-AFI. These genes were mainly enriched in pathways closely related to STC pathogenesis, such as arachidonic acid metabolism and aldosterone-regulated sodium reabsorption. 16S rRNA sequencing results indicated that AMR-AFI reversed the structural imbalance of the gut microbiota in model mice, increased species richness, downregulated the relative abundance of pro-inflammatory bacteria such as Parasutterella, and enriched beneficial and butyrate-producing bacteria, including Lachnospiraceae_NK4A136_group, Ruminococcaceae, and Lachnospiraceae. Spearman correlation analysis further showed that the beneficial bacteria enriched in the AMR-AFI group were negatively correlated with genes involved in the arachidonic acid metabolic pathway and positively correlated with genes in the aldosterone-regulated sodium reabsorption pathway. In contrast, pro-inflammatory bacteria in the model group exhibited the opposite correlation trends. ConclusionAMR-AFI can effectively exert synergistic therapeutic effects on STC by regulating intestinal microbiota, arachidonic acid-mediated inflammatory metabolism, and aldosterone-regulated water-salt balance pathways.
3.Traditional methods and artificial intelligence: current status, challenges, and future directions of risk assessment models for patients undergoing extracorporeal membrane oxygenation.
Zhaojie LIN ; Lu LU ; Menghao FANG ; Yanqing LIU ; Jifeng XING ; Haojun FAN
Chinese Critical Care Medicine 2025;37(10):893-900
Extracorporeal membrane oxygenation (ECMO) is primarily used in clinical practice to provide continuous extracorporeal respiratory and circulatory support for patients with severe heart and lung failure, thereby sustaining life. It is a key technology for managing severe heart failure and respiratory failure that are difficult to control. With the accumulation of clinical experience in ECMO for circulatory and/or respiratory support, as well as advancements in biomedical engineering technology, more portable and stable ECMO devices have been introduced into clinical use, benefiting an increasing number of critically ill patients. Although ECMO technology has become relatively mature, the timing of ECMO initiation, management of sudden complications, and monitoring and early warning of physiological indicators are critical factors that greatly affect the therapeutic outcomes of ECMO. This article reviews traditional methods and artificial intelligence techniques used in risk assessment related to ECMO, including the latest achievements and research hotspots. Additionally, it discusses future trends in ECMO risk management, focusing on six key areas: multi-center and prospective studies, external validation and standardization of model performance, long-term prognosis considerations, integration of innovative technologies, enhancing model interpretability, and economic cost-effectiveness analysis. This provides a reference for future researchers to build models and explore new research directions.
Extracorporeal Membrane Oxygenation
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Humans
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Artificial Intelligence
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Risk Assessment
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Respiratory Insufficiency/therapy*
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Heart Failure/therapy*
4.Application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy:a scoping review
Yanqing GUO ; Lijie YANG ; Qingyi WU ; Yan FANG
Chinese Journal of Nursing 2025;60(20):2464-2471
Objective To conduct a scoping review on the application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy,providing references for future research and clinical practice.Methods A literature search was performed in the PubMed,Web of Science,Embase,CINAHL,Cochrane Library,China National Knowledge Infrastructure(CNKI),China Biomedical Literature Database(SinoMed),Wanfang Database,VIP Database,the website of the American Urological Association and so on from the establishment of databases to March 7,2025.The included literature was summarized and analyzed.Results A total of 19 pieces of literature were included.The forms of intervention included applications,online platforms,and communication software.The intervention contents covered health education,functional exercise,self-management,communication and interaction,and follow-up management.The outcome indicators included physiological indicators,psychological indicators,quality of life,self-management,patient experience.Conclusion The application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy has certain feasibility.Howe ver,its forms of intervention,contents and evaluation indicators still need to be further expanded and improved.In the future,it is possible to explore the integration of emerging technologies,combine the multi-disciplinary collaboration model,and construct a more scientific and systematic home management plan for urinary incontinence patients.
5.Changing resistance profiles of Haemophilus influenzae and Moraxella catarrhalis isolates in hospitals across China:results from the CHINET Antimicrobial Resistance Surveillance Program,2015-2021
Hui FAN ; Chunhong SHAO ; Jia WANG ; Yang YANG ; Fupin HU ; Demei ZHU ; Yunsheng CHEN ; Qing MENG ; Hong ZHANG ; Chun WANG ; Fang DONG ; Wenqi SONG ; Kaizhen WEN ; Yirong ZHANG ; Chuanqing WANG ; Pan FU ; Chao ZHUO ; Danhong SU ; Jiangwei KE ; Shuping ZHOU ; Hua ZHANG ; Fangfang HU ; Mei KANG ; Chao HE ; Hua YU ; Xiangning HUANG ; Yingchun XU ; Xiaojiang ZHANG ; Wenen LIU ; Yanming LI ; Lei ZHU ; Jinhua MENG ; Shifu WANG ; Bin SHAN ; Yan DU ; Wei JIA ; Gang LI ; Jiao FENG ; Ping GONG ; Miao SONG ; Lianhua WEI ; Xin WANG ; Ruizhong WANG ; Hua FANG ; Sufang GUO ; Yanyan WANG ; Dawen GUO ; Jinying ZHAO ; Lixia ZHANG ; Juan MA ; Han SHEN ; Wanqing ZHOU ; Ruyi GUO ; Yan ZHU ; Jinsong WU ; Yuemei LU ; Yuxing NI ; Jingrong SUN ; Xiaobo MA ; Yanqing ZHENG ; Yunsong YU ; Jie LIN ; Ziyong SUN ; Zhongju CHEN ; Zhidong HU ; Jin LI ; Fengbo ZHANG ; Ping JI ; Yunjian HU ; Xiaoman AI ; Jinju DUAN ; Jianbang KANG ; Xuefei HU ; Xuesong XU ; Chao YAN ; Yi LI ; Shanmei WANG ; Hongqin GU ; Yuanhong XU ; Ying HUANG ; Yunzhuo CHU ; Sufei TIAN ; Jihong LI ; Bixia YU ; Cunshan KOU ; Jilu SHEN ; Wenhui HUANG ; Xiuli YANG ; Likang ZHU ; Lin JIANG ; Wen HE ; Chunlei YUE
Chinese Journal of Infection and Chemotherapy 2025;25(1):30-38
Objective To investigate the distribution and antimicrobial resistance profiles of clinically isolated Haemophilus influenzae and Moraxella catarrhalis in hospitals across China from 2015 to 2021,and provide evidence for rational use of antimicrobial agents.Methods Data of H.influenzae and M.catarrhalis strains isolated from 2015 to 2021 in CHINET program were collected for analysis,and antimicrobial susceptibility testing was performed by disc diffusion method or automated systems according to the uniform protocol of CHINET.The results were interpreted according to the CLSI breakpoints in 2022.Beta-lactamases was detected by using nitrocefin disk.Results From 2015 to 2021,a total of 43 642 strains of Haemophilus species were isolated,accounting for 2.91%of the total clinical isolates and 4.07%of Gram-negative bacteria in CHINET program.Among the 40 437 strains of H.influenzae,66.89%were isolated from children and 33.11%were isolated from adults.More than 90%of the H.influenzae strains were isolated from respiratory tract specimens.The prevalence of β-lactamase was 53.79%in H.influenzae strains.The H.influenzae strains isolated from children showed higher resistance rate than the strains isolated from adults.Overall,779 strains of H.influenzae did not produce β-lactamase but were resistant to ampicillin(BLNAR).Beta-lactamase-producing strains showed significantly higher resistance rates to these antimicrobial agents than the β-lactamase-nonproducing strains.Of the 16 191 M.catarrhalis strains,80.06%were isolated from children and 19.94%isolated from adults.M.catarrhalis strains were mostly susceptible to both amoxicillin-clavulanic acid and cefuroxime,evidenced by resistance rate lower than 2.0%.Conclusions The emergence of antibiotic-resistant H.influenzae due to β-lactamase production poses a challenge for clinical anti-infective treatment.Therefore,it is very important to implement antibiotic resistance surveillance for H.influenzae and guide rational antibiotic use.All local clinical microbiology laboratories should actively improve antibiotic susceptibility testing and strengthen antibiotic resistance surveillance for H.influenzae.
6.Changing resistance profiles of Haemophilus influenzae and Moraxella catarrhalis isolates in hospitals across China:results from the CHINET Antimicrobial Resistance Surveillance Program,2015-2021
Hui FAN ; Chunhong SHAO ; Jia WANG ; Yang YANG ; Fupin HU ; Demei ZHU ; Yunsheng CHEN ; Qing MENG ; Hong ZHANG ; Chun WANG ; Fang DONG ; Wenqi SONG ; Kaizhen WEN ; Yirong ZHANG ; Chuanqing WANG ; Pan FU ; Chao ZHUO ; Danhong SU ; Jiangwei KE ; Shuping ZHOU ; Hua ZHANG ; Fangfang HU ; Mei KANG ; Chao HE ; Hua YU ; Xiangning HUANG ; Yingchun XU ; Xiaojiang ZHANG ; Wenen LIU ; Yanming LI ; Lei ZHU ; Jinhua MENG ; Shifu WANG ; Bin SHAN ; Yan DU ; Wei JIA ; Gang LI ; Jiao FENG ; Ping GONG ; Miao SONG ; Lianhua WEI ; Xin WANG ; Ruizhong WANG ; Hua FANG ; Sufang GUO ; Yanyan WANG ; Dawen GUO ; Jinying ZHAO ; Lixia ZHANG ; Juan MA ; Han SHEN ; Wanqing ZHOU ; Ruyi GUO ; Yan ZHU ; Jinsong WU ; Yuemei LU ; Yuxing NI ; Jingrong SUN ; Xiaobo MA ; Yanqing ZHENG ; Yunsong YU ; Jie LIN ; Ziyong SUN ; Zhongju CHEN ; Zhidong HU ; Jin LI ; Fengbo ZHANG ; Ping JI ; Yunjian HU ; Xiaoman AI ; Jinju DUAN ; Jianbang KANG ; Xuefei HU ; Xuesong XU ; Chao YAN ; Yi LI ; Shanmei WANG ; Hongqin GU ; Yuanhong XU ; Ying HUANG ; Yunzhuo CHU ; Sufei TIAN ; Jihong LI ; Bixia YU ; Cunshan KOU ; Jilu SHEN ; Wenhui HUANG ; Xiuli YANG ; Likang ZHU ; Lin JIANG ; Wen HE ; Chunlei YUE
Chinese Journal of Infection and Chemotherapy 2025;25(1):30-38
Objective To investigate the distribution and antimicrobial resistance profiles of clinically isolated Haemophilus influenzae and Moraxella catarrhalis in hospitals across China from 2015 to 2021,and provide evidence for rational use of antimicrobial agents.Methods Data of H.influenzae and M.catarrhalis strains isolated from 2015 to 2021 in CHINET program were collected for analysis,and antimicrobial susceptibility testing was performed by disc diffusion method or automated systems according to the uniform protocol of CHINET.The results were interpreted according to the CLSI breakpoints in 2022.Beta-lactamases was detected by using nitrocefin disk.Results From 2015 to 2021,a total of 43 642 strains of Haemophilus species were isolated,accounting for 2.91%of the total clinical isolates and 4.07%of Gram-negative bacteria in CHINET program.Among the 40 437 strains of H.influenzae,66.89%were isolated from children and 33.11%were isolated from adults.More than 90%of the H.influenzae strains were isolated from respiratory tract specimens.The prevalence of β-lactamase was 53.79%in H.influenzae strains.The H.influenzae strains isolated from children showed higher resistance rate than the strains isolated from adults.Overall,779 strains of H.influenzae did not produce β-lactamase but were resistant to ampicillin(BLNAR).Beta-lactamase-producing strains showed significantly higher resistance rates to these antimicrobial agents than the β-lactamase-nonproducing strains.Of the 16 191 M.catarrhalis strains,80.06%were isolated from children and 19.94%isolated from adults.M.catarrhalis strains were mostly susceptible to both amoxicillin-clavulanic acid and cefuroxime,evidenced by resistance rate lower than 2.0%.Conclusions The emergence of antibiotic-resistant H.influenzae due to β-lactamase production poses a challenge for clinical anti-infective treatment.Therefore,it is very important to implement antibiotic resistance surveillance for H.influenzae and guide rational antibiotic use.All local clinical microbiology laboratories should actively improve antibiotic susceptibility testing and strengthen antibiotic resistance surveillance for H.influenzae.
7.Application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy:a scoping review
Yanqing GUO ; Lijie YANG ; Qingyi WU ; Yan FANG
Chinese Journal of Nursing 2025;60(20):2464-2471
Objective To conduct a scoping review on the application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy,providing references for future research and clinical practice.Methods A literature search was performed in the PubMed,Web of Science,Embase,CINAHL,Cochrane Library,China National Knowledge Infrastructure(CNKI),China Biomedical Literature Database(SinoMed),Wanfang Database,VIP Database,the website of the American Urological Association and so on from the establishment of databases to March 7,2025.The included literature was summarized and analyzed.Results A total of 19 pieces of literature were included.The forms of intervention included applications,online platforms,and communication software.The intervention contents covered health education,functional exercise,self-management,communication and interaction,and follow-up management.The outcome indicators included physiological indicators,psychological indicators,quality of life,self-management,patient experience.Conclusion The application of mobile health in the home management of patients with urinary incontinence after radical prostatectomy has certain feasibility.Howe ver,its forms of intervention,contents and evaluation indicators still need to be further expanded and improved.In the future,it is possible to explore the integration of emerging technologies,combine the multi-disciplinary collaboration model,and construct a more scientific and systematic home management plan for urinary incontinence patients.
8.Effects of small-group collaborative stratified teaching in standardized residency training in critical care medicine
Jun YANG ; Zhenhui DONG ; Fang LU ; Yanqing WANG ; Jinyan XING
Chinese Journal of Medical Education Research 2024;23(6):856-860
Objective:To explore the effects of small-group collaborative stratified teaching in critical care medicine training for professional postgraduate students.Methods:We randomly assigned 71 professional postgraduate students who entered the Intensive Care Unit of The Affiliated Hospital of Qingdao University for standardized training between June 2020 and November 2020 into experimental group and control group. An entrance examination was taken after one week of unified training. Then the experimental group adopted small-group collaborative stratified teaching, while the control group adopted traditional teaching for training. After two months of training, the Mini-Clinical Evaluation Exercise (Mini-CEX) assessment, post competency assessment, exit examination, and teaching satisfaction evaluation were conducted. SPSS 25.0 was used for the t test and chi-square test. Results:In the Mini-CEX assessment, the experimental group had significantly higher scores in history-taking skills [(7.42±0.60) vs. (7.00±0.55)], physical examination [(7.47±0.56) vs. (6.94±0.24)], communication skills [(7.56±0.50)vs.(7.24±0.49)], clinical dialectical thinking [(7.53±0.56) vs. (7.03±0.39)], clinical judgement [(7.50±0.51) vs.(6.90±0.42)], organization/efficiency [(7.58±0.50) vs. (7.15±0.44)], and overall clinical competence [(7.64±0.49) vs. (7.17±0.39); all P<0.05] than the control group. In the post competency assessment, the experimental group had significantly better performance in clinical basic competence [(89.15±9.12) vs. (86.24±10.23)], medical knowledge application [(48.37±5.87) vs. (46.98±3.68)], teamwork [(48.10±3.55) vs. (45.96±4.83)], information and management [(68.52±7.61) vs. (66.38±5.54)], and academic research [(22.18±0.95) vs. (20.87±1.22); all P<0.05] than the control group. The experimental group was also significantly superior to the control group in terms of the exit examination score and teaching satisfaction (both P<0.05). Conclusions:Small-group collaborative stratified teaching can improve the quality of critical care medicine training for professional postgraduate students, and strengthen their clinical comprehensive abilities and post competencies.
9.Surveillance of bacterial resistance in tertiary hospitals across China:results of CHINET Antimicrobial Resistance Surveillance Program in 2022
Yan GUO ; Fupin HU ; Demei ZHU ; Fu WANG ; Xiaofei JIANG ; Yingchun XU ; Xiaojiang ZHANG ; Fengbo ZHANG ; Ping JI ; Yi XIE ; Yuling XIAO ; Chuanqing WANG ; Pan FU ; Yuanhong XU ; Ying HUANG ; Ziyong SUN ; Zhongju CHEN ; Jingyong SUN ; Qing CHEN ; Yunzhuo CHU ; Sufei TIAN ; Zhidong HU ; Jin LI ; Yunsong YU ; Jie LIN ; Bin SHAN ; Yunmin XU ; Sufang GUO ; Yanyan WANG ; Lianhua WEI ; Keke LI ; Hong ZHANG ; Fen PAN ; Yunjian HU ; Xiaoman AI ; Chao ZHUO ; Danhong SU ; Dawen GUO ; Jinying ZHAO ; Hua YU ; Xiangning HUANG ; Wen'en LIU ; Yanming LI ; Yan JIN ; Chunhong SHAO ; Xuesong XU ; Wei LI ; Shanmei WANG ; Yafei CHU ; Lixia ZHANG ; Juan MA ; Shuping ZHOU ; Yan ZHOU ; Lei ZHU ; Jinhua MENG ; Fang DONG ; Zhiyong LÜ ; Fangfang HU ; Han SHEN ; Wanqing ZHOU ; Wei JIA ; Gang LI ; Jinsong WU ; Yuemei LU ; Jihong LI ; Qian SUN ; Jinju DUAN ; Jianbang KANG ; Xiaobo MA ; Yanqing ZHENG ; Ruyi GUO ; Yan ZHU ; Yunsheng CHEN ; Qing MENG ; Shifu WANG ; Xuefei HU ; Wenhui HUANG ; Juan LI ; Quangui SHI ; Juan YANG ; Abulimiti REZIWAGULI ; Lili HUANG ; Xuejun SHAO ; Xiaoyan REN ; Dong LI ; Qun ZHANG ; Xue CHEN ; Rihai LI ; Jieli XU ; Kaijie GAO ; Lu XU ; Lin LIN ; Zhuo ZHANG ; Jianlong LIU ; Min FU ; Yinghui GUO ; Wenchao ZHANG ; Zengguo WANG ; Kai JIA ; Yun XIA ; Shan SUN ; Huimin YANG ; Yan MIAO ; Mingming ZHOU ; Shihai ZHANG ; Hongjuan LIU ; Nan CHEN ; Chan LI ; Jilu SHEN ; Wanqi MEN ; Peng WANG ; Xiaowei ZHANG ; Yanyan LIU ; Yong AN
Chinese Journal of Infection and Chemotherapy 2024;24(3):277-286
Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in tertiary hospitals in major regions of China in 2022.Methods Clinical isolates from 58 hospitals in China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2022 Clinical &Laboratory Standards Institute(CLSI)breakpoints.Results A total of 318 013 clinical isolates were collected from January 1,2022 to December 31,2022,of which 29.5%were gram-positive and 70.5%were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species(excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi)was 28.3%,76.7%and 77.9%,respectively.Overall,94.0%of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 90.8%of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis showed significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 94.2%in the isolates from children and 95.7%in the isolates from adults.The resistance rate to carbapenems was lower than 13.1%in most Enterobacterales species except for Klebsiella,21.7%-23.1%of which were resistant to carbapenems.Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.1%to 13.3%.The prevalence of meropenem-resistant strains decreased from 23.5%in 2019 to 18.0%in 2022 in Pseudomonas aeruginosa,and decreased from 79.0%in 2019 to 72.5%in 2022 in Acinetobacter baumannii.Conclusions The resistance of clinical isolates to the commonly used antimicrobial agents is still increasing in tertiary hospitals.However,the prevalence of important carbapenem-resistant organisms such as carbapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a downward trend in recent years.This finding suggests that the strategy of combining antimicrobial resistance surveillance with multidisciplinary concerted action works well in curbing the spread of resistant bacteria.
10.Transporter-mediated Nano-delivery System in Promoting Oral Absorption of Drugs:A Review
Na TIAN ; Yanqing ZHANG ; Wei LI ; Leilei FANG ; Junbo XIE
Chinese Journal of Experimental Traditional Medical Formulae 2024;30(2):254-266
Oral administration is the most convenient way of drug delivery, but due to the existence of intestinal barrier, the oral bioavailability of drugs is generally low, especially for drugs with low water solubility, poor permeability and macromolecules. For decades, researchers have demonstrated that nano-delivery system is one of the most effective strategies to solve this problem, but nano-delivery systems have shown limited improvement in the oral bioavailability of drugs. Therefore, researchers have proposed to use transporter-mediated nano-delivery systems to promote the oral absorption of drugs. The intestinal tract were highly expressed as a transporter for ingesting various nutrients(such as glucose, oligopeptides and bile acids), which was an excellent target of oral drug delivery system. Its substrate were modified on the nano-delivery system, and the loaded drugs could cross the intestinal barrier and enter the systemic circulation more efficiently through the targeting effect of transporters. At present, more and more evidences supported the potential of transporters in the field of oral drug delivery system. Therefore, this paper reviewed the research on intestinal transporters-mediated nano-delivery system to promote oral absorption of drugs, including the distribution of intestinal transporters, three strategies of transporter substrate modification, the transport properties of different types of transporters and their effects of mediating the nano-delivery system for promoting the oral absorption of drugs or treating diseases, with the aim of providing an important theoretical reference for the development of intestinal targeted nano-delivery systems.

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