1.Identification and expression analysis of B3 gene family in Panax ginseng.
Yu-Long WANG ; Ai-Min WANG ; Jing-Hui YU ; Si-Zhang LIU ; Ge JIN ; Kang-Yu WANG ; Ming-Zhu ZHAO ; Yi WANG ; Mei-Ping ZHANG
China Journal of Chinese Materia Medica 2025;50(16):4593-4609
Panax ginseng as a perennial herb of Araliaceae, exhibits pharmacological effects such as central nervous system stimulation, anti-tumor properties, and cardiovascular and cerebrovascular protection. The B3 gene family plays a crucial role in growth and development, antioxidant activity, stress resistance, and secondary metabolism regulation of plants and has been extensively studied in various plants. However, the identification and analysis of the B3 gene family in P. ginseng have not been reported. In this study, a total of 145 B3 genes(PgB3s) with complete open reading frames(ORF) were identified from P. ginseng and classified into five subfamilies based on domain types. Through correlation analysis with ginsenoside content, SNP/InDels analysis, and interaction analysis with key enzyme genes, 15 PgB3 transcripts were found to be significantly correlated with ginsenoside content and exhibited a close interaction network with key enzyme genes involved in ginsenoside biosynthesis, which indicated that these genes may participate in the regulation of ginsenoside biosynthesis. Additionally, this study found that PgB3 genes exhibited induced expression in response to methyl jasmonate(MeJA) stress, which aligned with the presence of abundant stress response elements in their promoters, confirming the important role of the B3 gene family in P. ginseng in stress resistance. The results of this study revealed the potential functions of PgB3 genes in ginsenoside biosynthesis and stress response, providing a significant theoretical basis for further research on the functions of PgB3 genes and their regulatory mechanisms.
Panax/metabolism*
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Gene Expression Regulation, Plant
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Plant Proteins/metabolism*
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Ginsenosides/biosynthesis*
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Multigene Family
;
Phylogeny
2.Discovery of a novel AhR-CYP1A1 axis activator for mitigating inflammatory diseases using an in situ functional imaging assay.
Feng ZHANG ; Bei ZHAO ; Yufan FAN ; Lanhui QIN ; Jinhui SHI ; Lin CHEN ; Leizhi XU ; Xudong JIN ; Mengru SUN ; Hongping DENG ; Hairong ZENG ; Zhangping XIAO ; Xin YANG ; Guangbo GE
Acta Pharmaceutica Sinica B 2025;15(1):508-525
The aryl hydrocarbon receptor (AhR) plays a crucial role in regulating many physiological processes. Activating the AhR-CYP1A1 axis has emerged as a novel therapeutic strategy against various inflammatory diseases. Here, a practical in situ cell-based fluorometric assay was constructed to screen AhR-CYP1A1 axis modulators, via functional sensing of CYP1A1 activities in live cells. Firstly, a cell-permeable, isoform-specific enzyme-activable fluorogenic substrate for CYP1A1 was rationally constructed for in-situ visualizing the dynamic changes of CYP1A1 function in living systems, which was subsequently used for discovering the efficacious modulators of the AhR-CYP1A1 axis. Following screening of a compound library, LAC-7 was identified as an efficacious activator of the AhR-CYP1A1 axis, which dose-dependently up-regulated the expression levels of both CYP1A1 and AhR in multiple cell lines. LAC-7 also suppressed macrophage M1 polarization and reduced the levels of inflammatory factors in LPS-induced bone marrow-derived macrophages. Animal tests showed that LAC-7 could significantly mitigate DSS-induced ulcerative colitis and LPS-induced acute lung injury in mice, and markedly reduced the levels of multiple inflammatory factors. Collectively, an optimized fluorometric cell-based assay was devised for in situ functional imaging of CYP1A1 activities in living systems, which strongly facilitated the discovery of efficacious modulators of the AhR-CYP1A1 axis as novel anti-inflammatory agents.
3.Expert consensus on intentional tooth replantation.
Zhengmei LIN ; Dingming HUANG ; Shuheng HUANG ; Zhi CHEN ; Qing YU ; Benxiang HOU ; Lihong QIU ; Wenxia CHEN ; Jiyao LI ; Xiaoyan WANG ; Zhengwei HUANG ; Jinhua YU ; Jin ZHAO ; Yihuai PAN ; Shuang PAN ; Deqin YANG ; Weidong NIU ; Qi ZHANG ; Shuli DENG ; Jingzhi MA ; Xiuping MENG ; Jian YANG ; Jiayuan WU ; Lan ZHANG ; Jin ZHANG ; Xiaoli XIE ; Jinpu CHU ; Kehua QUE ; Xuejun GE ; Xiaojing HUANG ; Zhe MA ; Lin YUE ; Xuedong ZHOU ; Junqi LING
International Journal of Oral Science 2025;17(1):16-16
Intentional tooth replantation (ITR) is an advanced treatment modality and the procedure of last resort for preserving teeth with inaccessible endodontic or resorptive lesions. ITR is defined as the deliberate extraction of a tooth; evaluation of the root surface, endodontic manipulation, and repair; and placement of the tooth back into its original socket. Case reports, case series, cohort studies, and randomized controlled trials have demonstrated the efficacy of ITR in the retention of natural teeth that are untreatable or difficult to manage with root canal treatment or endodontic microsurgery. However, variations in clinical protocols for ITR exist due to the empirical nature of the original protocols and rapid advancements in the field of oral biology and dental materials. This heterogeneity in protocols may cause confusion among dental practitioners; therefore, guidelines and considerations for ITR should be explicated. This expert consensus discusses the biological foundation of ITR, the available clinical protocols and current status of ITR in treating teeth with refractory apical periodontitis or anatomical aberration, and the main complications of this treatment, aiming to refine the clinical management of ITR in accordance with the progress of basic research and clinical studies; the findings suggest that ITR may become a more consistent evidence-based option in dental treatment.
Humans
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Tooth Replantation/methods*
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Consensus
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Periapical Periodontitis/surgery*
4.Expert consensus on orthodontic treatment of patients with periodontal disease.
Wenjie ZHONG ; Chenchen ZHOU ; Yuanyuan YIN ; Ge FENG ; Zhihe ZHAO ; Yaping PAN ; Yuxing BAI ; Zuolin JIN ; Yan XU ; Bing FANG ; Yi LIU ; Hong HE ; Faming CHEN ; Weiran LI ; Shaohua GE ; Ang LI ; Yi DING ; Lili CHEN ; Fuhua YAN ; Jinlin SONG
International Journal of Oral Science 2025;17(1):27-27
Patients with periodontal disease often require combined periodontal-orthodontic interventions to restore periodontal health, function, and aesthetics, ensuring both patient satisfaction and long-term stability. Managing these patients involving orthodontic tooth movement can be particularly challenging due to compromised periodontal soft and hard tissues, especially in severe cases. Therefore, close collaboration between orthodontists and periodontists for comprehensive diagnosis and sequential treatment, along with diligent patient compliance throughout the entire process, is crucial for achieving favorable treatment outcomes. Moreover, long-term orthodontic retention and periodontal follow-up are essential to sustain treatment success. This expert consensus, informed by the latest clinical research and practical experience, addresses clinical considerations for orthodontic treatment of periodontal patients, delineating indications, objectives, procedures, and principles with the aim of providing clear and practical guidance for clinical practitioners.
Humans
;
Consensus
;
Orthodontics, Corrective/standards*
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Periodontal Diseases/complications*
;
Tooth Movement Techniques/methods*
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Practice Guidelines as Topic
5.Expert consensus on the diagnosis and treatment of cemental tear.
Ye LIANG ; Hongrui LIU ; Chengjia XIE ; Yang YU ; Jinlong SHAO ; Chunxu LV ; Wenyan KANG ; Fuhua YAN ; Yaping PAN ; Faming CHEN ; Yan XU ; Zuomin WANG ; Yao SUN ; Ang LI ; Lili CHEN ; Qingxian LUAN ; Chuanjiang ZHAO ; Zhengguo CAO ; Yi LIU ; Jiang SUN ; Zhongchen SONG ; Lei ZHAO ; Li LIN ; Peihui DING ; Weilian SUN ; Jun WANG ; Jiang LIN ; Guangxun ZHU ; Qi ZHANG ; Lijun LUO ; Jiayin DENG ; Yihuai PAN ; Jin ZHAO ; Aimei SONG ; Hongmei GUO ; Jin ZHANG ; Pingping CUI ; Song GE ; Rui ZHANG ; Xiuyun REN ; Shengbin HUANG ; Xi WEI ; Lihong QIU ; Jing DENG ; Keqing PAN ; Dandan MA ; Hongyu ZHAO ; Dong CHEN ; Liangjun ZHONG ; Gang DING ; Wu CHEN ; Quanchen XU ; Xiaoyu SUN ; Lingqian DU ; Ling LI ; Yijia WANG ; Xiaoyuan LI ; Qiang CHEN ; Hui WANG ; Zheng ZHANG ; Mengmeng LIU ; Chengfei ZHANG ; Xuedong ZHOU ; Shaohua GE
International Journal of Oral Science 2025;17(1):61-61
Cemental tear is a rare and indetectable condition unless obvious clinical signs present with the involvement of surrounding periodontal and periapical tissues. Due to its clinical manifestations similar to common dental issues, such as vertical root fracture, primary endodontic diseases, and periodontal diseases, as well as the low awareness of cemental tear for clinicians, misdiagnosis often occurs. The critical principle for cemental tear treatment is to remove torn fragments, and overlooking fragments leads to futile therapy, which could deteriorate the conditions of the affected teeth. Therefore, accurate diagnosis and subsequent appropriate interventions are vital for managing cemental tear. Novel diagnostic tools, including cone-beam computed tomography (CBCT), microscopes, and enamel matrix derivatives, have improved early detection and management, enhancing tooth retention. The implementation of standardized diagnostic criteria and treatment protocols, combined with improved clinical awareness among dental professionals, serves to mitigate risks of diagnostic errors and suboptimal therapeutic interventions. This expert consensus reviewed the epidemiology, pathogenesis, potential predisposing factors, clinical manifestations, diagnosis, differential diagnosis, treatment, and prognosis of cemental tear, aiming to provide a clinical guideline and facilitate clinicians to have a better understanding of cemental tear.
Humans
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Dental Cementum/injuries*
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Consensus
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Diagnosis, Differential
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Cone-Beam Computed Tomography
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Tooth Fractures/therapy*
6.Expert consensus on the treatment of oral diseases in pregnant women and infants.
Jun ZHANG ; Chenchen ZHOU ; Liwei ZHENG ; Jun WANG ; Bin XIA ; Wei ZHAO ; Xi WEI ; Zhengwei HUANG ; Xu CHEN ; Shaohua GE ; Fuhua YAN ; Jian ZHOU ; Kun XUAN ; Li-An WU ; Zhengguo CAO ; Guohua YUAN ; Jin ZHAO ; Zhu CHEN ; Lei ZHANG ; Yong YOU ; Jing ZOU ; Weihua GUO
International Journal of Oral Science 2025;17(1):62-62
With the growing emphasis on maternal and child oral health, the significance of managing oral health across preconception, pregnancy, and infancy stages has become increasingly apparent. Oral health challenges extend beyond affecting maternal well-being, exerting profound influences on fetal and neonatal oral development as well as immune system maturation. This expert consensus paper, developed using a modified Delphi method, reviews current research and provides recommendations on maternal and child oral health management. It underscores the critical role of comprehensive oral assessments prior to conception, diligent oral health management throughout pregnancy, and meticulous oral hygiene practices during infancy. Effective strategies should be seamlessly integrated across the life course, encompassing preconception oral assessments, systematic dental care during pregnancy, and routine infant oral hygiene. Collaborative efforts among pediatric dentists, maternal and child health workers, and obstetricians are crucial to improving outcomes and fostering clinical research, contributing to evidence-based health management strategies.
Humans
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Pregnancy
;
Female
;
Infant
;
Consensus
;
Mouth Diseases/therapy*
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Pregnancy Complications/therapy*
;
Oral Health
;
Infant, Newborn
;
Delphi Technique
;
Oral Hygiene
7.Effect of Shenkang Injection on Podocyte Apoptosis and GRP78/CHOP Signaling Pathway in db/db Mice with Diabetic Kidney Disease Based on Endoplasmic Reticulum Stress
Yanmo CAI ; Sitong WANG ; Xin ZHOU ; Ge JIN ; Kaidong ZHOU ; Yunhua LIU ; Fengfeng ZHANG ; Xinxue ZHANG ; Zongjiang ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(12):81-90
ObjectiveTo investigate the mechanism of Shenkang injection in delaying diabetic kidney disease by regulating endoplasmic reticulum stress and attenuating podocyte apoptosis through the Glucose regulated protein 78 ( GRP78 ) / transcription factor C / EBP homologous protein ( CHOP ) signaling pathway (GRP78/CHOP) signaling pathway. MethodsFor the animal experiment, 10 12-week-old db/m mice were selected as a normal group, and 30 12-week-old db/db mice were randomly divided into a model group, a Shenkang injection group (15.6 mL·kg-1), and a dapagliflozin group (1.6 mg·kg-1). To observe the general condition of mice, fasting blood glucose, urinary albumin/urine creatinine (ACR), and 24 h urine protein quantification were detected in each group before drug administration. After 12 weeks of drug treatment, mice were tested for fasting blood glucose, total cholesterol (TC), triglyceride (TG), low-density cholesterol (LDL), ACR, 24 h urine protein quantification, blood creatinine (SCr), and blood urea (UREA). Hematoxylin-eosin (HE) staining, periodic acid-Schiff (PAS) staining, and transmission electron microscopy were used to observe the pathologic morphology in renal tissue. Immunohistochemistry was used to detect the expressions of nephroprotective marker protein (Nephrin), glucose-regulated protein 78 (GRP78), CCAAT/enhancer-binding protein homologous protein (CHOP), B-cell lymphoma-2 (Bcl-2), and Bcl-2-associated X protein (Bax) in renal tissue. Western blot was used to detect the expressions of GRP78, CHOP, Bcl-2, Bax, and Nephrin proteins, and Real-time polymerase chain reaction (Real-time PCR) was employed to detect the expressions of Nephrin, GRP78, CHOP, Bcl-2, and Bax mRNAs in renal tissue. ResultsBefore drug administration, compared with those in the normal group, the body mass of db/db mice was significantly increased, and blood glucose, 24 h urine protein quantification, and ACR were significantly elevated in the Shenkang injection group and Dapagliflozin group (P<0.01). After 12 weeks of administration, compared with those in the model group, the general state of mice in the Shenkang injection group was significantly improved, and the body mass was decreased. The blood glucose was significantly reduced (P<0.01), and blood lipids TC, TG, and LDL were significantly decreased (P<0.05, P<0.01). The 24 h urine protein quantification and ACR were significantly decreased (P<0.05), and SCr and UREA were significantly reduced (P<0.01). Compared with those of the model group, the pathologic results of the Shenkang injection group showed that proliferation of mesangial cells, reduction of inflammatory cell infiltration, and alleviation of renal tubular vacuolization and podocyte damage were observed in renal tissue of mice. Electron microscopy showed that fusion of the pedicle protruding and thickening of the basement membrane were reduced. Immunohistochemistry results showed that the expressions of GRP78, CHOP, and Bax proteins were significantly reduced (P<0.01), and the expressions of Nephrin and Bcl-2 proteins were significantly increased (P<0.01) in renal tissue of the Shenkang injection group. Western blot results showed that the expressions of Nephrin and Bcl-2 in the Shenkang injection group were significantly increased (P<0.05, P<0.01), and the expressions of GRP78, CHOP, and Bax proteins were significantly decreased (P<0.05, P<0.01). Real-time PCR results showed that the expressions of GRP78, CHOP, and Bax mRNAs were down regulated in the Shenkang injection group (P<0.01), and the expressions of Nephrin and Bcl-2 mRNAs were up regulated (P<0.01). ConclusionShenkang injection inhibits endoplasmic reticulum stress response and podocyte apoptosis by regulating the GRP78/CHOP signaling pathway, which in turn ensures the integrity of glomerular filtration barrier, reduces the occurrence of proteinuria, improves renal function, and thus delays the progression of diabetic kidney disease.
8.Effect of Shenkang Injection on Podocyte Apoptosis and GRP78/CHOP Signaling Pathway in db/db Mice with Diabetic Kidney Disease Based on Endoplasmic Reticulum Stress
Yanmo CAI ; Sitong WANG ; Xin ZHOU ; Ge JIN ; Kaidong ZHOU ; Yunhua LIU ; Fengfeng ZHANG ; Xinxue ZHANG ; Zongjiang ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(12):81-90
ObjectiveTo investigate the mechanism of Shenkang injection in delaying diabetic kidney disease by regulating endoplasmic reticulum stress and attenuating podocyte apoptosis through the Glucose regulated protein 78 ( GRP78 ) / transcription factor C / EBP homologous protein ( CHOP ) signaling pathway (GRP78/CHOP) signaling pathway. MethodsFor the animal experiment, 10 12-week-old db/m mice were selected as a normal group, and 30 12-week-old db/db mice were randomly divided into a model group, a Shenkang injection group (15.6 mL·kg-1), and a dapagliflozin group (1.6 mg·kg-1). To observe the general condition of mice, fasting blood glucose, urinary albumin/urine creatinine (ACR), and 24 h urine protein quantification were detected in each group before drug administration. After 12 weeks of drug treatment, mice were tested for fasting blood glucose, total cholesterol (TC), triglyceride (TG), low-density cholesterol (LDL), ACR, 24 h urine protein quantification, blood creatinine (SCr), and blood urea (UREA). Hematoxylin-eosin (HE) staining, periodic acid-Schiff (PAS) staining, and transmission electron microscopy were used to observe the pathologic morphology in renal tissue. Immunohistochemistry was used to detect the expressions of nephroprotective marker protein (Nephrin), glucose-regulated protein 78 (GRP78), CCAAT/enhancer-binding protein homologous protein (CHOP), B-cell lymphoma-2 (Bcl-2), and Bcl-2-associated X protein (Bax) in renal tissue. Western blot was used to detect the expressions of GRP78, CHOP, Bcl-2, Bax, and Nephrin proteins, and Real-time polymerase chain reaction (Real-time PCR) was employed to detect the expressions of Nephrin, GRP78, CHOP, Bcl-2, and Bax mRNAs in renal tissue. ResultsBefore drug administration, compared with those in the normal group, the body mass of db/db mice was significantly increased, and blood glucose, 24 h urine protein quantification, and ACR were significantly elevated in the Shenkang injection group and Dapagliflozin group (P<0.01). After 12 weeks of administration, compared with those in the model group, the general state of mice in the Shenkang injection group was significantly improved, and the body mass was decreased. The blood glucose was significantly reduced (P<0.01), and blood lipids TC, TG, and LDL were significantly decreased (P<0.05, P<0.01). The 24 h urine protein quantification and ACR were significantly decreased (P<0.05), and SCr and UREA were significantly reduced (P<0.01). Compared with those of the model group, the pathologic results of the Shenkang injection group showed that proliferation of mesangial cells, reduction of inflammatory cell infiltration, and alleviation of renal tubular vacuolization and podocyte damage were observed in renal tissue of mice. Electron microscopy showed that fusion of the pedicle protruding and thickening of the basement membrane were reduced. Immunohistochemistry results showed that the expressions of GRP78, CHOP, and Bax proteins were significantly reduced (P<0.01), and the expressions of Nephrin and Bcl-2 proteins were significantly increased (P<0.01) in renal tissue of the Shenkang injection group. Western blot results showed that the expressions of Nephrin and Bcl-2 in the Shenkang injection group were significantly increased (P<0.05, P<0.01), and the expressions of GRP78, CHOP, and Bax proteins were significantly decreased (P<0.05, P<0.01). Real-time PCR results showed that the expressions of GRP78, CHOP, and Bax mRNAs were down regulated in the Shenkang injection group (P<0.01), and the expressions of Nephrin and Bcl-2 mRNAs were up regulated (P<0.01). ConclusionShenkang injection inhibits endoplasmic reticulum stress response and podocyte apoptosis by regulating the GRP78/CHOP signaling pathway, which in turn ensures the integrity of glomerular filtration barrier, reduces the occurrence of proteinuria, improves renal function, and thus delays the progression of diabetic kidney disease.
9.Yishen Huashi Granules Protect Kidneys of db/db Mice via p38 MAPK Signaling Pathway
Kaidong ZHOU ; Sitong WANG ; Ge JIN ; Yanmo CAI ; Xin ZHOU ; Yunhua LIU ; Xinxue ZHANG ; Min ZHANG ; Zongjiang ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(3):58-68
ObjectiveTo explore the mechanism of Yishen Huashi granules in alleviating renal tubular epithelial cell injury and relieving diabetic kidney disease by regulating the mitogen-activated protein kinase (MAPK) signaling pathway. MethodsThe db/db mice of 12 weeks old were randomly assigned into model , dapagliflozin (1.6 mg·kg-1), and Yishen Huashi granules (4.7 g·kg-1), and db/m mice were used as the control group. The general conditions of mice were observed, and fasting blood glucose and 24-h urinary protein and albumin-to-creatinine ratio (ACR) were measured at weeks 0 and 12 of administration. After 12 weeks of treatment, the levels of serum creatinine (SCr), blood urea (UREA), triglycerides (TG), total cholesterol (TC), and low density lipoprotein (LDL) were measured. The pathological changes in the renal tissue were observed by hematoxylin-eosin (HE) staining, Periodic acid-Schiff (PAS) staining, Mallory staining, and transmission electron microscopy. Real-time PCR was employed to determine the mRNA levels of monocyte chemotactic protein-1 (MCP-1) and CC chemokine receptor-2 (CCR2) in the renal tissue of mice. The immunohistochemical assay was employed to examine the expression of p38, phospho-p38 (p-p38), MCP-1, and CCR2 in the renal tissue of mice. Western blotting was employed to measure the protein levels of p-p38, p38, MCP-1, and CCR2 in the renal tissue of mice.HK-2 cells cultured in vitro were grouped as follows: negative control, high glucose(30 mmol·L-1), Yishen Huashi granule-containing serum, and SB203580. After 48 h of cell culture in each group, RNA were extracted and the levels of MCP-1, and CCR2 mRNA were determined by Real-time PCR,proteins were extracted and the levels of p38, p-p38, MCP-1, and CCR2 were determined by Western blot. ResultsThe in vivo experiments showed that before treatment, other groups had higher body weight, blood glucose level, 24 h urinary protein, and ACR than the control group (P<0.05,P<0.01). After 12 weeks of treatment, compared with the model group, the Yishen Huashi granules group showed improved general conditions, a decreasing trend in body weight, lowered levels of blood glucose, 24-h urinary protein, and ACR (P<0.01), reduced SCr and UREA (P<0.01), and declined levels of TC, TG, and LDL (P<0.05,P<0.01). Compared with the model group, the Yishen Huashi granules group showed alleviated damage and interstitial fibrosis in the renal tissue as well as reductions in glomerular foot process fusion and basement membrane thickening. Moreover, the Yishen Huashi granules group showed down-regulated mRNA levels of MCP-1 and CCR2 (P<0.01), reduced positive expression of p-p38, MCP-1, and CCR2 (P<0.01), and down-regulated protein levels of p-p38/p38, MCP-1, and CCR2 (P<0.05) in the renal tissue. The cell experiment showed that compared with the high glucose group, the Yishen Huashi granule-containing serum group showcased down-regulated mRNA levels of MCP-1 and CCR2 (P<0.01) and down-regulated protein levels of p-p38/p38, MCP-1, and CCR2(P<0.05,P<0.01). ConclusionYishen Huashi granules can regulate glucose-lipid metabolism, reduce 24 h urinary protein and ACR, improve the renal function, alleviate the renal tubule injury caused by high glucose, and protect renal tubule epithelial cells in db/db mice by reducing MCP-1/CCR2 activation via the p38 MAPK signaling pathway.
10.Changing antibiotic resistance profiles of the bacterial strains isolated from geriatric patients in hospitals across China:data from CHINET Antimicrobial Resistance Surveillance Program,2015-2021
Xiaoman AI ; Yunjian HU ; Chunyue GE ; Yang YANG ; Fupin HU ; Demei ZHU ; Yingchun XU ; Xiaojiang ZHANG ; Hui LI ; Ping JI ; Yi XIE ; Mei KANG ; Chuanqing WANG ; Pan FU ; Yuanhong XU ; Ying HUANG ; Ziyong SUN ; Zhongju CHEN ; Yuxing NI ; Jingyong SUN ; Yunzhuo CHU ; Sufei TIAN ; Zhidong HU ; Jin LI ; Yunsong YU ; Jie LIN ; Bin SHAN ; Yan DU ; Sufang GUO ; Lianhua WEI ; Fengmei ZOU ; Hong ZHANG ; Chun WANG ; Chao ZHUO ; Danhong SU ; Dawen GUO ; Jinying ZHAO ; Hua YU ; Xiangning HUANG ; Wen'en LIU ; Yanming LI ; Yan JIN ; Chunhong SHAO ; Xuesong XU ; Chao YAN ; 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 ; Jinju DUAN ; Jianbang KANG ; Xiaobo MA ; Yanping ZHENG ; Ruyi GUO ; Yan ZHU ; Yunsheng CHEN ; Qing MENG ; Shifu WANG ; Xuefei HU ; Jilu SHEN ; Wenhui HUANG ; Ruizhong WANG ; Hua FANG ; Bixia YU ; Yong ZHAO ; Ping GONG ; Kaizhen WENG ; Yirong ZHANG ; Jiangshan LIU ; Longfeng LIAO ; Hongqin GU ; Lin JIANG ; Wen HE ; Shunhong XUE ; Jiao FENG ; Chunlei YUE
Chinese Journal of Infection and Chemotherapy 2025;25(3):290-302
Objective To investigate the antimicrobial resistance of clinical isolates from elderly patients(≥65 years)in major medical institutions across China.Methods Bacterial strains were isolated from elderly patients in 52 hospitals participating in the CHINET Antimicrobial Resistance Surveillance Program during the period from 2015 to 2021.Antimicrobial susceptibility test was carried out by disk diffusion method and automated systems according to the same CHINET protocol.The data were interpreted in accordance with the breakpoints recommended by the Clinical and Laboratory Standards Institute(CLSI)in 2021.Results A total of 514 715 nonduplicate clinical isolates were collected from elderly patients in 52 hospitals from January 1,2015 to December 31,2021.The number of isolates accounted for 34.3%of the total number of clinical isolates from all patients.Overall,21.8%of the 514 715 strains were gram-positive bacteria,and 78.2%were gram-negative bacteria.Majority(90.9%)of the strains were isolated from inpatients.About 42.9%of the strains were isolated from respiratory specimens,and 22.9%were isolated from urine.More than half(60.7%)of the strains were isolated from male patients,and 39.3%isolated from females.About 51.1%of the strains were isolated from patients aged 65-<75 years.The prevalence of methicillin-resistant strains(MRSA)was 38.8%in 32 190 strains of Staphylococcus aureus.No vancomycin-or linezolid-resistant strains were found.The resistance rate of E.faecalis to most antibiotics was significantly lower than that of Enterococcus faecium,but a few vancomycin-resistant strains(0.2%,1.5%)and linezolid-resistant strains(3.4%,0.3%)were found in E.faecalis and E.faecium.The prevalence of penicillin-susceptible S.pneumoniae(PSSP),penicillin-intermediate S.pneumoniae(PISP),and penicillin-resistant S.pneumoniae(PRSP)was 94.3%,4.0%,and 1.7%in nonmeningitis S.pneumoniae isolates.The resistance rates of Klebsiella spp.(Klebsiella pneumoniae 93.2%)to imipenem and meropenem were 20.9%and 22.3%,respectively.Other Enterobacterales species were highly sensitive to carbapenem antibiotics.Only 1.7%-7.8%of other Enterobacterales strains were resistant to carbapenems.The resistance rates of Acinetobacter spp.(Acinetobacter baumannii 90.6%)to imipenem and meropenem were 68.4%and 70.6%respectively,while 28.5%and 24.3%of P.aeruginosa strains were resistant to imipenem and meropenem,respectively.Conclusions The number of clinical isolates from elderly patients is increasing year by year,especially in the 65-<75 age group.Respiratory tract isolates were more prevalent in male elderly patients,and urinary tract isolates were more prevalent in female elderly patients.Klebsiella isolates were increasingly resistant to multiple antimicrobial agents,especially carbapenems.Antimicrobial resistance surveillance is helpful for accurate empirical antimicrobial therapy in elderly patients.

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