1.Mechanism of active ingredient compatibility of Dimocarpus longan Lour. leaves in improving glucose and lipid metabolism disorders in type 2 diabetic mellitus rats
Yanli LIANG ; Shijia AN ; Fengsheng LI ; Jiani MAI ; Anqi HUO ; Jiali WEI ; Zejuan ZHANG ; Shuyan QIN ; Wenqing HUANG ; Jie LIANG
China Pharmacy 2026;37(13):1697-1703
OBJECTIVE To explore the mechanism of the active ingredient compatibility(quercetin, quercitrin and kaempferol at a mass ratio of 2∶9∶3)of Dimocarpus longan Lour. leaves(abbreviated as CDL) on ameliorating glucose and lipid metabolism disorders in type 2 diabetes mellitus (T2DM) rats. METHODS SD rats were randomly divided into blank control group, model group, metformin hydrochloride group (100 mg/kg), and CDL high-, medium- and low-dose groups (280, 140, 75 mg/kg), with 10 rats in each group. Rats in the blank control group were fed with standard chow, while rats in the other groups were given high-sugar and high-fat diet combined with intraperitoneal injection of streptozotocin to establish the T2DM rat model. After successful modeling, rats in each administration group were given corresponding drug solution, and rats in the blank control group and model group were intragastrically administered with equal volume of pure water, once a day, for consecutive 4 weeks. Fasting blood glucose (FBG) was detected at fixed time every week. The curves of oral glucose tolerance test (OGTT) and intraperitoneal insulin tolerance test (IPITT) were plotted, and the area under curve (AUC) was calculated. The pancreatic islet function indexes [fasting insulin (FINS), homeostasis model assessment of insulin resistance (HOMA-IR), insulin sensitivity index (ISI)],blood lipid indexes [total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C)] and hepatic glycogen content were determined. The pathological morphological changes of liver and pancreatic tissues were observed. The protein and mRNA expression levels of molecules related to phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway in liver tissues were detected. RESULTS Compared with the blank control group, the FBG, AUC of IPITT curve, AUC of OGTT curve, HOMA-IR, the levels of FINS, TC, TG and LDL-C, as well as the protein and mRNA expression of phosphatase and tensin homolog, forkhead box protein O1 and glycogen synthase kinase-3β in liver tissues were significantly increased in the model group ( P <0.05). ISI, the levels of HDL-C and hepatic glycogen content, along with the protein and mRNA expression of PI3K, insulin receptor substrate-1, Akt and protein expression of phosphorylated Akt in liver tissues were markedly decreased ( P <0.05). In model group rats, the arrangement of hepatocytes was irregular, the overall structure of pancreatic lobules was disordered, and a large number of inflammatory cell infiltration was observed. Compared with the model group, most of the above quantitative indexes were significantly reversed in the CDL high-dose group ( P <0.05), and the pathological lesions of liver and pancreas were obviously alleviated. CONCLUSIONS CDL can regulate glucose and lipid metabolism disorders, elevate insulin sensitivity and relieve insulin resistance in T2DM rats. Its mechanism may be related to the activation of the PI3K/Akt signaling pathway.
2.Dual Targeting of TBK1 and JAK-STAT1 Pathways by (-)-epigallocatechin-3-gallate Suppresses Type I Interferon-driven Inflammation
Liang LI ; Qi-Huan SHENG ; Huan LIU ; Wen-Hao YANG ; Jia-Lin SHI ; Ying-Jie SUN ; Rui JING ; Wei-Hua MAI ; Zhi-Min LI ; Xiao-Li XIE
Progress in Biochemistry and Biophysics 2026;53(7):1969-1983
ObjectiveType I interferon (IFN-I) signaling is essential for antiviral innate immunity, yet its sustained or excessive activation contributes to the pathogenesis of several autoimmune diseases and interferonopathies, such as systemic lupus erythematosus and Aicardi-Goutières syndrome. Current strategies targeting this pathway, exemplified by JAK inhibitors, act mainly on downstream signal transduction and provide limited direct control over upstream IFN-I production, while also carrying the risk of broad immunosuppression. Phyllanthus emblica L. has long been used in traditional medicine for inflammatory disorders, but the bioactive constituent responsible for its regulation of IFN-I signaling and the underlying molecular mechanism have not been clearly defined. This study aimed to identify the active anti-inflammatory component of P. emblica and to characterize its mechanism of action on the IFN-I pathway in macrophages. MethodsActive components ofP. emblica and their candidate targets were screened by network pharmacology using the TCMSP and DrugBank databases (oral bioavailability≥30%, drug-likeness≥0.18) and intersected with inflammation-related genes retrieved from public databases. The predicted interaction between EGCG and IFN-I pathway proteins (TBK1, IRF3, STAT1) was evaluated by molecular docking, with BX795 and GSK8612 used as reference TBK1 inhibitors. Mechanistic experiments were performed in THP-1-derived macrophages and primary bone marrow-derived macrophages (BMDM). Upstream signaling was activated by transfection of the nucleic acid analogs poly(I∶C) and poly(dA∶dT) or by lipopolysaccharide (LPS) stimulation, whereas downstream signaling was activated by exogenous IFN-β. An siRNA-mediated TREX1 knockdown model was used to mimic endogenous nucleic acid-driven interferonopathy. Expression of IFN-β1 and interferon-stimulated genes (ISGs) was measured by RT-qPCR, protein phosphorylation by Western blot, and IFN-β secretion by ELISA. Cellular thermal shift assay (CETSA) and drug affinity responsive target stability (DARTS) were used to probe the interactionbetween EGCG and IRF3. ResultsNetwork pharmacology identified (-)-epigallocatechin-3-gallate (EGCG) as a candidate IFN-I-suppressive constituent of P. emblica, with predicted binding to TBK1, IRF3, and STAT1. Molecular docking yielded binding energies of -9.2, -7.2, and -8.2 kcal/mol for TBK1, IRF3, and STAT1, respectively, indicating an affinity for TBK1 comparable to that of the reference inhibitors BX795 (-5.7 kcal/mol) and GSK8612 (-6.4 kcal/mol). EGCG suppressed IFN-β1 and ISG mRNA expression under poly (I∶C), poly (dA∶dT), and LPS stimulation in both THP-1 macrophages and BMDM. At the protein level, EGCG reduced the phosphorylation of TBK1 and IRF3 without affecting the levels of the upstream sensors cGAS and RIG-I, and lowered IFN-β secretion in a concentration-dependent manner. CETSA and DARTS showed that EGCG did not enhance the thermal stability or protease resistance of IRF3, indicating that its effect on IRF3 is indirect. Following IFN-β stimulation, prolonged EGCG treatment reduced STAT1 phosphorylation in a time-dependent manner without an apparent change in IRF9, and partially attenuated ISG transcription; this effect was not monotonicly concentration-dependent, and CXCL10 showed the most consistent suppression. In TREX1-knockdown cells, the elevated mRNA levels of ISG15, ISG56, and CXCL10 were reduced by EGCG. ConclusionEGCG suppresses IFN-I responses by concurrently inhibiting TBK1-IRF3-dependent IFN‑β production and JAK-STAT1-mediated downstream transcription. These in vitro findings provide a mechanistic basis for the anti-inflammatory use of P. emblica in traditional medicine and identify EGCG as a candidate for further evaluation in interferon-driven autoimmune disease models.
3.Mechanism of active ingredient compatibility of Dimocarpus longan Lour. leaves in improving glucose and lipid metabolism disorders in type 2 diabetic mellitus rats
Yanli LIANG ; Shijia AN ; Fengsheng LI ; Jiani MAI ; Anqi HUO ; Jiali WEI ; Zejuan ZHANG ; Shuyan QIN ; Wenqing HUANG ; Jie LIANG
China Pharmacy 2026;37(13):1697-1703
OBJECTIVE To explore the mechanism of the active ingredient compatibility(quercetin, quercitrin and kaempferol at a mass ratio of 2∶9∶3)of Dimocarpus longan Lour. leaves(abbreviated as CDL) on ameliorating glucose and lipid metabolism disorders in type 2 diabetes mellitus (T2DM) rats. METHODS SD rats were randomly divided into blank control group, model group, metformin hydrochloride group (100 mg/kg), and CDL high-, medium- and low-dose groups (280, 140, 75 mg/kg), with 10 rats in each group. Rats in the blank control group were fed with standard chow, while rats in the other groups were given high-sugar and high-fat diet combined with intraperitoneal injection of streptozotocin to establish the T2DM rat model. After successful modeling, rats in each administration group were given corresponding drug solution, and rats in the blank control group and model group were intragastrically administered with equal volume of pure water, once a day, for consecutive 4 weeks. Fasting blood glucose (FBG) was detected at fixed time every week. The curves of oral glucose tolerance test (OGTT) and intraperitoneal insulin tolerance test (IPITT) were plotted, and the area under curve (AUC) was calculated. The pancreatic islet function indexes [fasting insulin (FINS), homeostasis model assessment of insulin resistance (HOMA-IR), insulin sensitivity index (ISI)],blood lipid indexes [total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C)] and hepatic glycogen content were determined. The pathological morphological changes of liver and pancreatic tissues were observed. The protein and mRNA expression levels of molecules related to phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway in liver tissues were detected. RESULTS Compared with the blank control group, the FBG, AUC of IPITT curve, AUC of OGTT curve, HOMA-IR, the levels of FINS, TC, TG and LDL-C, as well as the protein and mRNA expression of phosphatase and tensin homolog, forkhead box protein O1 and glycogen synthase kinase-3β in liver tissues were significantly increased in the model group ( P <0.05). ISI, the levels of HDL-C and hepatic glycogen content, along with the protein and mRNA expression of PI3K, insulin receptor substrate-1, Akt and protein expression of phosphorylated Akt in liver tissues were markedly decreased ( P <0.05). In model group rats, the arrangement of hepatocytes was irregular, the overall structure of pancreatic lobules was disordered, and a large number of inflammatory cell infiltration was observed. Compared with the model group, most of the above quantitative indexes were significantly reversed in the CDL high-dose group ( P <0.05), and the pathological lesions of liver and pancreas were obviously alleviated. CONCLUSIONS CDL can regulate glucose and lipid metabolism disorders, elevate insulin sensitivity and relieve insulin resistance in T2DM rats. Its mechanism may be related to the activation of the PI3K/Akt signaling pathway.
4.Prognostic Value of Dynamic Monitoring of WT1 Expression Levels for Relapse and Overall Survival in AML Patients Undergoing Allogeneic Hematopoietic Stem Cell Transplantation During First Complete Remission
Xiao-Ya HE ; Han-Yun REN ; Yu-Jun DONG ; Li JI ; Qing-Yun WANG ; Yuan LI ; Yue YIN ; Ze-Yin LIANG ; Qian WANG ; Wei-Lin XU ; Jin-Ping OU ; Bing-Jie WANG ; Wei LIU
Journal of Experimental Hematology 2025;33(6):1790-1796
Objective:To analyze the predictive role of WT1 expression levels pre-and early post-transplantation on relapse and overall survival(OS)in patients with acute myeloid leukemia(AML)undergoing allogeneic hematopoietic stem cell transplantation(allo-HSCT)during their first complete remission(CR1).Methods:A retrospective analysis was conducted on the clinical data of 107 adult AML patients who underwent allo-HSCT during their CR1 at our center between May 2012 and December 2021.The predictive role of bone marrow WT1 expression levels before transplantation and at 3 and 6 months post-transplantation on relapse and OS was explored in combination with relevant clinical factors.Results:The median follow-up time for the 107 patients was 70(range:11-117)months.Among the patients,15 cases died.Kaplan-Meier survial analysis showed that the 3-year overall survival(OS)rate was 85.0%.20 patients experienced relapse,with a median time to relapse of 8(range:0.5-44)months and a l-year cumulative relapse rate of 13.1%.The overall median value of WT1 before transplantation,3 months after transplantation,and 6 months after transplantation was 0.26%(range:0%-23.64%),with an upper quartile value of 0.74%.No statistically significant differences in WT1 expression levels were observed among the pre-transplantation,3-month post-transplantation,and 6-month post-transplantation time points(P=0.227).Univariate analysis showed that patients with WT1 levels>0.74%at 3 months post-transplantation had a higher 1-year relapse rate(P=0.029)and lower 3-year OS rate(P<0.001)compared to patients with WT1 levels ≤0.74%.Other significant factors affecting 1-year relapse included stem cell source(P=0.041)and chronic graft-versus-host disease(cGVHD)(P=0.013).For 3-year OS,additional influencing factors were genetic high risk(P=0.048)and stem cell source(P=0.016).Multivariate analysis revealed that WT1 level>0.74%at 3 months post-transplantation had a trend to affect 1-year relapse rate(HR=3.309,95%CI:0.958-11.431,P=0.058),while the absence of cGVHD was an independent risk factor for 1-year relapse(HR=3.473,95%CI:0.749-16.100,P=0.037).Only WT1 level>0.74%at 3 months post-transplantation was an independent risk factor for 3-year OS(HR=6.886,95%CI:2.402-19.738,P<0.001).Conclusion:High WT1 expression level at 3 months post-transplantation in AML patients undergoing allo-HSCT during CR1 affects the 1-year relapse rate and 3-year OS,and is an independent risk factor affecting 3-year OS.These findings suggest that dynamic monitoring of WT1 expression levels has certain value in prognostic assessment of AML patients who received allo-HSCT during CR1.
5.Early screening and diagnosis of prostate cancer based on the innovative care for chronic conditions framework
Han-jing ZHU ; Liang DONG ; Bin ZHAO ; Feng ZHANG ; Rong LI ; Cheng-ye ZHU ; Jia MAO ; Zhen-ying YANG ; Yin-jie ZHU ; Wei XUE
National Journal of Andrology 2025;31(3):229-233
Objective:To construct an integrated management model for early screening and diagnosis of PCa based on the In-novative Care for Chronic Conditions Framework(ICCC)and the 1+1 contract-based tiered diagnosis and treatment system(TDTS)in China.Methods:Based on the 1+1 contract-based TDTS platform,we conducted PCa screening for the male residents aged 60 years and above during health check-ups in Pujin Community Health Center from January 1,2023 to December 31,2023.For those with abnormal total prostate-specific antigen(tPSA)≥4 μg/L,we promptly referred them to higher-level hospitals for further diagno-sis and treatment via the two-way referral green channel platform and information sharing service using the 1+1 contract model.We further analyzed the relevant data on screening and diagnosis.Results:A total of 4 080 males aged 71.39±5.059 years received PCa screening from January to December 2023.PSA screening was performed in 43.96%of the male residents,revealing 654 cases of PSA abnormality,with a PSA positivity rate of 16.03%,which was higher than that found in the previous large-scale PCa screenings in other regions of China.Among the males with PSA abnormality,292(44.65%)expressed their willingness for medical referral,while the others did not seek further medical attention for reasons of being asymptomatic,low awareness of the disease,no accompany for medical visits,and concerns about further costs of diagnosis and treatment.Prostate biopsy was recommended to 154 cases after further examinations,which was accepted by 92(59.74%).Fifty-eight cases were diagnosed with Pa,and thedetection rate reached 63.04%.Conclusion:The integrated management model for PSA examination-based early screening and diagnosis of PCa using the 1+1 contract-based TDTS platform is plays a significant role in enhancing peoples awareness and knowledge of PCa and improving the early detection rate of the malignancy.
6.Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults (version 2025)
Zhengwei XU ; Liming CHENG ; Qixin CHEN ; Jian DONG ; Shunwu FAN ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Weimin JIANG ; Dianming JIANG ; Yong HAI ; Lijun HE ; Yuan HE ; Bo LI ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Yong LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Wei MEI ; Chao MA ; Renfu QUAN ; Limin RONG ; Jiacan SU ; Honghui SUN ; Yuemin SONG ; Hongxun SANG ; Jun SHU ; Tiansheng SUN ; Jiwei TIAN ; Qiang WANG ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Liang YAN ; Guoyong YIN ; Jie ZHAO ; Yue ZHU ; Xiaobo ZHANG ; Xuesong ZHANG ; Zhongmin ZHANG ; Rongqiang ZHANG ; Dingjun HAO ; Yanzheng GAO ; Baorong HE
Chinese Journal of Trauma 2025;41(1):19-32
Thoracolumbar spine fracture often leads to severe pain, functional impairments, and neurological deficits, for which open reduction and internal fixation can effectively restore the spinal structural stability. Open decompression and reduction with internal fixation can help relieve spinal cord compression and improve spinal function in cases of concomitant cord injury. Although spinal stability can be restored through surgery, patients often face chronic pain and functional impairments postoperatively. A postoperative rehabilitation program is critical in optimizing therapeutic outcomes, reducing complications, and minimizing the risk of secondary injuries. However, current rehabilitation methods, such as physical therapy, functional training, and pain management, are confronted with problems in clinical practice, including significant variation in efficacy, poor patient adherence, and prolonged rehabilitation period. There is an urgent need for a unified rehabilitation strategy to address these problems. To this end, the Spinal Trauma Group of the Orthopedic Physicians Branch of the Chinese Medical Association and the Spine Health Professional Committee of the Chinese Human Health Technology Promotion Association organized experts from relevant fields to formulate Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults ( version 2025) by integrating evidences from clinical researches and advanced rehabilitation concepts at home and abroad. A total number of 14 recommendations concerning the rehabilitation treatment with multimodal analgesia, psychological intervention, deep vein thrombosis prevention, core muscle and extremity exercise, appropriate use of braces, early weight-bearing, device-aided rehabilitation exercise, neuroregulatory therapy, rehabilitation team were put forward, aiming to standardize the post-operative rehabilitation process following internal fixation, promote the functional recovery, and enhance patients′ quality of life.
7.Evidence-based clinical practice guideline for bone cement-augmented pedicle screw technique (version 2025)
Sihao HE ; Junchao XING ; Tongwei CHU ; Zhengqi CHANG ; Xigao CHENG ; Fei DAI ; Xiaobing JIANG ; Jie HAO ; Jiang HU ; Jinghui HUANG ; Tianyong HOU ; Fei LUO ; Bo LIAO ; Changqing LI ; Lei LIU ; Guodong LIU ; Peng LIU ; Sheng LU ; Weishi LI ; Yang LIU ; Zhen LIU ; Wei MEI ; Peifu TANG ; Bing WANG ; Bing WANG ; Ce WANG ; Hongli WANG ; Liang WANG ; Shengru WANG ; Xiaobin WANG ; Yang WANG ; Yingfeng WANG ; Zheng WANG ; Jianzhong XU ; Guoyong YIN ; Haiyang YU ; Qiang YANG ; Zhaoming YE ; Bin ZHANG ; Chengmin ZHANG ; Jun ZOU ; Qiang ZHOU ; Min ZHAO ; Rui ZHOU ; Xiaojun ZHANG ; Yongfei ZHAO ; Zhongrong ZHANG ; Zehua ZHANG ; Yingze ZHANG
Chinese Journal of Trauma 2025;41(11):1035-1047
For middle-aged and elderly patients with conditions such as spinal fractures and degenerative spinal diseases, spinal internal fixation is a core surgical procedure for reconstructing spinal stability, heavily relying on the biomechanical stability provided by pedicle screw systems. Whereas, these patients are often complicated by osteoporosis that can significantly compromise the stability of the bone-pedicle screw interface, leading to a marked increase in pedicle screw loosening and surgical failure rates. The bone cement-augmented pedicle screw technique, which involves injecting bone cement into the vertebral body or screw trajectory to optimize the mechanical properties of the bone-pedicle screw composite, has been proven to significantly enhance fixation strength and effectively prevent screw-related failures, thereby reducing the incidence of internal fixation failure in high-risk populations undergoing spinal fusion. However, the widespread clinical application of this technique has faced challenges such as inaccurate clinical decision-making (indication and contraindication selection), non-standardized operative practices, and insufficient awareness of complication prevention, resulting in considerable variability in clinical outcomes and even severe complications. To address this, Prof. Luo Fei from First Affiliated Hospital of Army Medical University initiated the project and the Chinese Association Orthopaedic Surgeons organized relevant experts to develop the Evidence-based clinical practice guideline for bone cement-augmented pedicle screw technique ( version 2025), based on current evidence. The guidelines put forward 8 recommendations regarding the clinical value, scope of application, and operational standards of the technique, aiming to provide evidence-based medical support and technical standardization for clinical decision-making.
8.Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures (version 2025)
Bolong ZHENG ; Wei MEI ; Yanzheng GAO ; Liming CHENG ; Jian CHEN ; Qixin CHEN ; Liang CHEN ; Xigao CHENG ; Jian DONG ; Jin FAN ; Shunwu FAN ; Xiangqian FANG ; Zhong FANG ; Shiqing FENG ; Haoyu FENG ; Haishan GUAN ; Yong HAI ; Baorong HE ; Lijun HE ; Yuan HE ; Hua HUI ; Weimin JIANG ; Junjie JIANG ; Dianming JIANG ; Xuewen KANG ; Hua GUO ; Jianjun LI ; Feng LI ; Li LI ; Weishi LI ; Chunde LI ; Qi LIAO ; Baoge LIU ; Xiaoguang LIU ; Xuhua LU ; Shibao LU ; Bin LIN ; Chao MA ; Xuexiao MA ; Renfu QUAN ; Limin RONG ; Honghui SUN ; Tiansheng SUN ; Yueming SONG ; Hongxun SANG ; Jun SHU ; Jiacan SU ; Jiwei TIAN ; Xinwei WANG ; Zhe WANG ; Zheng WANG ; Zhengwei XU ; Huilin YANG ; Jiancheng YANG ; Liang YAN ; Feng YAN ; Guoyong YIN ; Xuesong ZHANG ; Zhongmin ZHANG ; Jie ZHAO ; Yuhong ZENG ; Yue ZHU ; Rongqiang ZHANG
Chinese Journal of Trauma 2025;41(9):805-818
Acute symptomatic osteoporotic thoracolumbar compression fracture (ASOTLF) can lead to chronic low back pain, kyphosis deformity, pulmonary dysfunction, loss of mobility, and even life-threatening complications. Vertebral augmentation is currently the mainstream treatment method for this condition. In 2019, the Editorial Board of Chinese Journal of Trauma and the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association collaboratively led the development of Clinical guideline for vertebral augmentation for acute symptomatic osteoporotic thoracolumbar compression fractures. Six years later, with advances in clinical diagnosis and treatment techniques as well as accumulating evidence in related fields, the 2019 guideline requires updating. To this end, the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association, the Spinal Health Professional Committee of China Human Health Science and Technology Promotion Association, and the Minimally Invasive Orthopedics Professional Committee of Shaanxi Medical Doctor Association have organized experts in the field to develop the Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures ( version 2025) , based on the latest evidence-based medical researches. This guideline incorporates 3 recommendations retained from the 2019 version with updated strength of evidence, along with 12 new recommendations. It provides recommendations from six aspects of diagnosis, pain management, treatment option selection, prevention of postoperative complications, anti-osteoporosis therapy, and postoperative rehabilitation, aiming to provide a reference for standard treatment of vertebral augmentation for ASOTLF in hospitals at all levels.
9.Screening of Anti-Streptococcus pneumoniae Active Ingredients from Pilea peltata
Zhiying WEI ; Yan HUANG ; Shenggao YIN ; Jie LIANG ; Chengsheng LU ; Fangchan LI ; Yuting XIE ; Yaohua LI ; Xiaojiao PAN
Herald of Medicine 2025;44(5):687-694
Objective To screen the anti-Streptococcus pneumoniae(Spn)active ingredients in vitro from different po-lar parts of Pilea peltata,and to examine the combined antibacterial effect of the active ingredient and amoxicillin(AMX).Methods A 96-well plate microdilution method was used to determine the minimum inhibitory concentration(MIC)of different polar parts;the most active polar part was separated by preparative high-performance liquid chromatography,and the active ingre-dients were identified using spectral technology.The fractional inhibitory concentration(FIC)of active ingredients and AMX was determined by the 96-well plate chessboard microdilution method.The crystal violet method was used to investigate the effect of ac-tive ingredients on Spn biofilm.The effect of active ingredients on the appearance and morphology of Spn was investigated under the electron microscope.Results The MICs of the petroleum ether part,chloroform part,ethyl acetate part,n-butanol part,and water part were 1.000,1.000,0.500,1.000,and 2.000 mg·mL-1 respectively,among which the ethyl acetate part had the stron-gest antibacterial activity.Three compounds were isolated from ethyl acetate,namely 5,7,3',4'-tetramethoxyflavone 1,8-O-(p-coumaroyl)-1(10)E,4(5)E-humuladien-8-ol 2 and 1-O-p-coumaroyl copaborneol 3.These compounds were all isolated for the first time from Pilea peltate,their MICs against Spn were 200.000,50.000,and 25.000 μg·mL-1 respectively,and the compound 3 had the strongest antibacterial activity;the FIC value of AMX and compound 3 was 0.50,which had a synergistic antibacterial effect on Spn.Both AMX and compound 3 had inhibitory effects on Spn biofilm,but the biofilm inhibition rate of compound 3(59.10±1.04%)was significantly lower than AMX(87.38±0.84)%(P<0.01);Moreover,there was no significant difference in biofilm inhibition rate between the combination of the two and AMX(P>0.05).The scanning electron microscope results showed that the bacterial cells in the compound 3 group had a smooth surface but varying degrees of depression.The surface of the bacteri-al cells in the AMX group and the AMX combined compound 3 group showed severe swelling and rupture.Conclusions Fla-vonoids and sesquiterpenoids are both the anti-Spn active components of Pilea peltate.Among them,sesquiterpenoids have more potent antibacterial activity,and their antibacterial action mechanism is related to inhibiting bacterial biofilms.Compound 3 and AMX have a synergistic antibacterial effect on Spn,but its mechanism of action is not by enhancing biofilm inhibition;although compound 3 cannot destroy the cell wall of Spn,it still has a negative impact on the appearance of the bacteria.
10.Ligustilide improves demyelination of dMCAO mouse model by inhibiting inflammation through AIM2/caspase-1 signaling pathway
Ya-jie LIANG ; Jian LIU ; Ying CHEN ; Zi-wei ZHANG ; Meng PU ; Yi-bin TANG ; Hai-fei ZHANG ; Guo-bin SONG ; Cun-gen MA ; Qing WANG
Chinese Pharmacological Bulletin 2025;41(5):851-860
Aim To explore the mechanism of ligustil-ide(LIG)improving demyelination by inhibiting in-flammatory response in mice with distal middle cerebral artery occlusion(dMCAO)through AIM2/caspase-1 signal pathway.Methods Thirty C57BL/6N male mice were randomly divided into three groups:sham operation group(Sham group,n=10),model group(dMCAO group,n=10)and treatment group(LIG group,n=10).The dMCAO mouse model was estab-lished by electrocoagulation in dMCAO group and LIG group.The mice were scored by Longa after waking up,and the changes of cerebral blood flow were moni-tored by laser speckle blood flow imaging system after dMCAO.One hour after modeling,LIG(30 mg·kg-1·d-1)was injected intraperitoneally in LIG group,and the same amount of normal saline was injected in sham group and dMCAO group for one week until the end of the experiment.The mice in each group were stained with TTC,and the brain injury was observed pathologically.Fatigue turning bar test and open field test were used to evaluate the motor function and anxie-ty degree of mice,and then the brain tissues of mice were taken for black gold staining to compare the chan-ges of myelin sheath in each group.Immunofluores-cence staining was used to detect the average fluores-cence intensity of MBP,IBA1 and GFAP in CC,CPU and CX regions of mouse brains.ELISAwas used to de-tect the contents of TNF-α,IL-6,IL-1 β,IL-17A and BDNF in brain tissue proteins of mice.Western blot-ting was used to detect the protein expressions of AIM2,caspase-1 and ASC-in each group.Results Compared with the dMCAO group,the infarct area was reduced,the behavior was significantly improved and the demyelination was reduced in the LIG group.The expression of MBP protein in CC,CPU and CX regions increased(P<0.05),the expression of IBA1 in CX decreased(P<0.01),and the expression of GFAP in-creased in CC,CPU and CX regions(P<0.01).The results of ELISA showed that the levels ofTNF-α(P<0.01),IL-6(P<0.01),IL-1β(P<0.05)and IL-17A(P<0.01)significantly decreased,while the ex-pression of BDNF increased(P<0.05).The protein expression levels of AIM2,caspase-1 and ASC in mouse brain decreased after treatment(P<0.01).Conclusion LIG has a protective effect on demyelina-tion in dMCAO mice,which may be related to the inhi-bition of AIM2/caspase-1 signaling pathway and in-flammation and to the promotion of BDNF secretion.

Result Analysis
Print
Save
E-mail