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Berberine Enhances Intestinal Mucosal Barrier Function by Promoting Vitamin D Receptor Activity

Chinese Journal of Integrative Medicine 2024年第2期30卷 143-151页

作者： HUANG Yong-quan LIU Jia-lin CHEN Geng-xin SHEN Dan-ting ZHU Wang CHEN Xin-lin LIU Feng-bin HOU Qiu-ke Graduate School Guangzhou University of Chinese MedicineGuangzhou(510405)China department of orthopedics the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou(510006)China department of Preventive Medicine and Health Statistics Guangzhou University of Chinese MedicineGuangzhou(510006)China department of Gastroenterology the First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou(510405)China

Objective:To evaluate if berberine can act on vitamin D receptors(VDR)and thereby regulate the expression of tight junction proteins(TJPs)in irritable bowel syndrome-diarrhea-predominant(IBS-D)***:the newborn rats were induced into IBS-D rat model via neonatal maternal separation combined with acetic acid chemical *** modeling,the model was evaluated and rats were divided into the control group and berberine treatment groups(0.85,1.7 and 3.4 mg/kg,once a day for 2 weeks).the distal colon was obtained and colonic epithelial cells(CECs)were isolated and cultured after IBS-D model *** vitamin D receptor response element(VDRE)reporter gene was determined in the CECs of IBS-D rats to analyze the effect of berberine on the VDRE *** overexpression or silencing technology was used to analyze whether VDR plays a role in promoting intestinal barrier repair,and to determine which region of VDR plays a role in berberine-regulated intestinal ***:the IBS-D rat model was successfully constructed and the symptoms were improved by berberine in a dose-dependent manner(Pthe activity of VDRE promoter was also effectively promoted by berberine(Pthe expression of TJPs in IBS-D CECs(Pthat compared with the blank group,expressions of occludin and zonula occludens-1 were significantly higher in VDR containing groups(all Pthe highest expression levels of occludin and zonula occludens-1(Pthe main site of action is the N-terminal region of VDR.

关键词： berberine Chinese medicine irritable bowel syndrome-diarrhea-predominant vitamin D receptors intestinal mucosal barrier tight junction proteins

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Effect of Heat Treatment on Microstructure and Mechanical Behavior of Cu-Bearing 316L Stainless Steel Produced by Selective Laser Melting

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 169-180页

作者： Huan Yang Ying Liu Jianbo Jin Kunmao Li Junjie Yang Lingjian Meng Chunbo Li Wencai Zhang Shengfeng Zhou Sino-German College of Intelligent Manufacturing Shenzhen Technology UniversityShenzhen518118China Institute of Advanced Wear and Corrosion Resistance and Functional Materials Jinan UniversityGuangzhou510632China department of orthopedics First Affiliated Hospital of Jinan UniversityGuangzhou510632China

Cu-bearing stainless steels(SSs)with high strength,excellent plasticity,and effective antimicrobial properties hold significant potential for applications in the marine *** this study,Cu-bearing SSs with copper ranging from 0 to 6.0 wt%were successfully prepared using selective laser melting(SLM)*** the Cu-bearing SSs with different copper contents,the effect of heat treatment on the microstructural and mechanical behaviors was studied *** observations revealed that the subgrain size of Cu-bearing SSs increased with heat treatment at 500℃ and 700℃ for 6 ***,the tensile strength and elongation increased after the heat treatment temperature due to the combined effect of dislocations,twins,andε-Cu precipitated ***,after heat treatment at 700℃,the SLM4.5Cu sample exhibited an abnormal rise in tensile strength and *** finding suggests that the diffusion strengthening caused byε-Cu precipitates exceeded the stacking fault ***,the tensile strength and elongation reached 693.32 MPa and 56.94%,*** work provides an efficient approach for preparing Cu-bearing SSs with exceptional strength and plasticity.

关键词： Selective laser melting Cu-bearing stainless steel(SS) Heat treatment Mechanical properties

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DAPK2 promotes autophagy to accelerate the progression of ossification of the posterior longitudinal ligament through the mTORC1 complex

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BIOCELL 2024年第9期48卷 1389-1400页

作者： LEI SHI JIANSHI YIN YU CHEN JIANGANG SHI JINHAO MIAO department of Spine Surgery Shanghai Changzheng HospitalShanghai200003China department of orthopedics The 967th Hospital of Chinese People’s Liberation ArmyDalian116000China

Background:Ossification of the posterior longitudinal ligament(OPLL)is a prevalent condition in *** death-associated protein kinase 2(DAPK2)is known to play roles in cellular apoptosis and autophagy,its specific contributions to the advancement of OPLL are not well ***:Ligament fibroblasts were harvested from patients diagnosed with *** such as real-time reverse transcriptasepolymerase chain reaction(RT-qPCR)and Western blot analysis were employed to assess DAPK2 levels in both ligament tissues and cultured *** extent of osteogenic differentiation in these cells was evaluated using an alizarin red S(ARS)***,the expression of ossification markers and autophagy markers was *** autophagic activity was further analyzed through LC3 immunofluorescence and transmission electron microscopy(TEM).An in vivo heterotopic bone formation assay was conducted in mice to assess the role of DAPK2 in ***:Elevated DAPK2 expression was confirmed in both OPLL patient tissues and derived fibroblasts,in contrast to non-OPLL *** of DAPK2 significantly curtailed osteogenic differentiation and autophagy in these fibroblasts,evidenced by decreased levels of LC3,and Beclin1,and reduced autophagosome ***,DAPK2 was found to inhibit the mechanistic target of the rapamycin complex 1(mTORC1)complex’s *** vivo studies demonstrated that DAPK2 facilitates ossification,and this effect could be counteracted by the mTORC1 inhibitor ***:DAPK2 enhances autophagy and osteogenic processes in OPLL through modulation of the mTORC1 pathway.

关键词： Ossification of the posterior longitudinal ligament DAPK2 Autophagy mTORC1

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Detection of Novel BEST1 Variations in Autosomal Recessive Bestrophinopathy Using third-generation Sequencing

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Current Medical Science 2024年第2期44卷 419-425页

作者： Jia-xun LI Ling-rui MENG Bao-ke HOU Xiao-lu HAO Da-jiang WANG Ling-hui QU Zhao-hui LI Lei ZHANG Xin JIN department of Senior Ophthalmology the Third Medical Center of PLA General HospitalBeijing 100853China department of Ophthalmology the 74th Army Group HospitalGuangzhou 510318China

Objective:Autosomal recessive bestrophinopathy(ARB),a retinal degenerative disease,is characterized by central visual loss,yellowish multifocal diffuse subretinal deposits,and a dramatic decrease in the light peak on *** potential pathogenic mechanism involves mutations in the BEST1 gene,which encodes Ca2+-activated Cl−channels in the retinal pigment epithelium(RPE),resulting in degeneration of RPE and *** this study,the complete clinical characteristics of two Chinese ARB families were ***:Pacific Biosciences(PacBio)single-molecule real-time(SMRT)sequencing was performed on the probands to screen for disease-causing gene mutations,and Sanger sequencing was applied to validate variants in the patients and their family ***:Two novel mutations,c.202T>C(chr11:61722628,p.Y68H)and c.867+97G>A,in the BEST1 gene were identified in the two Chinese ARB *** novel missense mutation BEST1 c.202T>C(p.Y68H)resulted in the substitution of tyrosine with histidine in the N-terminal region of transmembrane domain 2 of *** novel variant,BEST1 c.867+97G>A(chr11:61725867),located in intron 7,might be considered a regulatory variant that changes allele-specific binding affinity based on motifs of important transcriptional ***:Our findings represent the first use of third-generation sequencing(TGS)to identify novel BEST1 mutations in patients with ARB,indicating that TGS can be a more accurate and efficient tool for identifying mutations in specific *** novel variants identified further broaden the mutation spectrum of BEST1 in the Chinese population.

关键词： autosomal recessive bestrophinopathy BEST1 gene third-generation sequencing mutation

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Matrix stiffening promotes chondrocyte senescence and the osteoarthritis development through downregulating HDAC3

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Bone Research 2024年第2期12卷 438-452页

作者： Bowen Fu Jianlin Shen Xuenong Zou Nian Sun Ze Zhang Zengping Liu Canjun Zeng Huan Liu Wenhua Huang Guangdong Medical Innovation Platform for Translation of 3D Printing Application The Third Affiliated HospitalSouthern Medical UniversityGuangzhou 510630 GuangdongChina Guangdong Engineering Research Center for Translation of Medical 3D Printing Application Guangdong Provincial Key Laboratory of Digital Medicine and BiomechanicsNational Key Discipline of Human AnatomySchool of Basic Medical SciencesSouthern Medical UniversityGuangzhou 510145 GuangdongChina department of Foot and Ankle Surgery Center for Orthopedic SurgeryThe Third Affiliated HospitalSouthern Medical UniversityGuangzhou 510630 GuangdongChina department of orthopedics Affiliated Hospital of Putian UniversityPutian 351100 FujianChina Central Laboratory Affiliated Hospital of Putian UniversityPutian 351100 FujianChina Guangdong Provincial Key Laboratory of orthopedics and Traumatology Department of Spinal SurgeryThe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510080 GuangdongChina Nanfang hospital Southern Medical UniversityGuangzhou 510515 GuangdongChina guangzhou Blood Center Guangzhou 510095 GuangdongChina department of orthopedics The Affiliated Traditional Chinese Medicine HospitalSouthwest Medical UniversityLuzhou 646000 SichuanChina

Extracellular matrix(ECM)stiffening is a typical characteristic of cartilage aging,which is a quintessential feature of knee osteoarthritis(KOA).However,little is known about how ECM stiffening affects chondrocytes and other molecules *** study mimicked the physiological and pathological stiffness of human cartilage using polydimethylsiloxane(PDMS)*** demonstrated that epigenetic Parkin regulation by histone deacetylase 3(HDAC3)represents a new mechanosensitive mechanism by which the stiffness matrix affected chondrocyte *** found that ECM stiffening accelerated cultured chondrocyte senescence in vitro,while the stiffness ECM downregulated HDAC3,prompting Parkin acetylation to activate excessive mitophagy and accelerating chondrocyte senescence and osteoarthritis(OA)in ***,intra-articular injection with an HDAC3-expressing adeno-associated virus restored the young phenotype of the aged chondrocytes stimulated by ECM stiffening and alleviated OA in *** findings indicated that changes in the mechanical ECM properties initiated pathogenic mechanotransduction signals,promoted the Parkin acetylation and hyperactivated mitophagy,and damaged chondrocyte *** results may provide new insights into chondrocyte regulation by the mechanical properties of ECM,suggesting that the modification of the physical ECM properties may be a potential OA treatment strategy.

关键词： chondrocyte osteoarthritis stiffness

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Mapk7 deletion in chondrocytes causes vertebral defects by reducing MEF2C/PTEN/AKT signaling

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Genes & Diseases 2024年第2期11卷 964-977页

作者： Chengzhi Wu Hengyu Liu Dongmei Zhong Xiaoming Yang Zhiheng Liao Yuyu Chen Shun Zhang Deying Su Baolin Zhang Chuan Li Liru Tian Caixia Xu Peiqiang Su Guangdong Provincial Key Laboratory of orthopedics and Traumatology Department of Spine SurgeryThe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China Research Center for Translational Medicine The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China Precision Medicine Institute The First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510080China department of orthopedics Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Guangdong Provincial Key Laboratory of Proteomics and State Key Laboratory of Organ Failure Research School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong 510515China

Mutation of the MAPK7 gene was related to human ***7 regulated the development of limb bones and skulls in ***,the role of MAPK7 in vertebral development is still *** this study,we constructed Col2a1-cre;Mapk7 f/f transgenic mouse model to delete Mapk7 in cartilage,which displayed kyphosis and ***,Mapk7 loss decreased MEF2C expression and thus activated PTEN to oppose PI3K/AKT signaling in vertebral growth plate chondrocytes,which impaired chondrocyte hypertrophy and attenuated vertebral *** vivo,systemic pharmacological activation of AKT rescued impaired chondrocyte hypertrophy and alleviated mouse vertebral defects caused by Mapk7 *** study firstly clarified the mechanism by which MAPK7 was involved in vertebral development,which might contribute to understanding the pathology of spinal deformity and provide a basis for the treatment of developmental disorders of the spine.

关键词： Chondrocyte hypertrophy Growth plate Kyphosis MAPK7 MEF2C Osteopenia PI3K/AKT PTEN

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Scalable production of mesoporous titanium nanoparticles through sequential flash nanocomplexation

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Chinese Chemical Letters 2024年第4期35卷 303-309页

作者： Feng Cui Fangman Chen Xiaochun Xie Chenyang Guo Kai Xiao Ziping Wu Yinglu Chen Junna Lu Feixia Ruanb Chuanxu Cheng Chao Yang Dan Shao School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou 511442China Institutes for Life Sciences School of MedicineSouth China University of TechnologyGuangzhou 510006China School of Biology and Biological Engineering South China University of TechnologyGuangzhou 510006China department of orthopedics Academy of Orthopedics-Guangdong ProvinceOrthopedic Hospital of Guangdong ProvinceGuangdong Provincial Key Laboratory of Bone and Joint Degenerative DiseasesThe Third Affiliated Hospital of Southern Medical UniversityGuangzhou 510665China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou 510006China

Mesoporous titanium nanoparticles(MTNs) have emerged as an important porous semiconductor owning to their large surface area and unique electronic/optical properties. However, the fundamental research for rational manufacturing MTNs in a highly scalable manner remains a challenge. In this study, we report a two-step flash nanocomplexation(FNC) approach to large-scalable generate MTNs through the sequential combination of two multi-inlet vortex mixers. By optimizing the concentrated titanium precursor,polyethylene glycol(PEG)-functionalized silane amount and p H, we have been able to produce MTNs with small particle size(31.5 nm), larger surface area(416.9 m^(2)/g) and pore volume(0.59 cm^(3)/g). Different from the traditional MTNs bulk, FNC-produced MTNs exhibited well-controlled manner and exceptional photocatalytic and antibacterial properties. Importantly, the optimized MTNs outperformed commercial P25 not only in protecting ultraviolet A(UVA)-exposed skin, but also in treating P. aeruginosa-infected wound. We believe that the high controllability and scalability of sequential flash nanocomplexation method offers great opportunities in enhancing the performance of mesoporous titanium nanoparticles.

关键词： Mesoporous titanium nanoparticles Flash nanocomplexation Photocatalytic Antibacterial Sequential

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Epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China:a hospital-based retrospective study

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Neural Regeneration Research 2024年第5期19卷 1126-1132页

作者： Hengxing Zhou Yongfu Lou Lingxiao Chen Yi Kang Lu Liu Zhiwei Cai David BAnderson Wei Wang Chi Zhang Jinghua Wang Guangzhi Ning Yanzheng Gao Baorong He Wenyuan Ding Yisheng Wang Wei Mei Yueming Song Yue Zhou Maosheng Xia Huan Wang Jie Zhao Guoyong Yin Tao Zhang Feng Jing Rusen Zhu Bin Meng Li Duan Zhongmin Zhang Desheng Wu Zhengdong Cai Lin Huang Zhanhai Yin Kainan Li Shibao Lu Shiqing Feng department of orthopedics The Second HospitalCheeloo College of MedicineShandong UniversityShandongChina department of orthopedics Shandong University Center for OrthopedicsQilu HospitalCheeloo College of MedicineShandong UniversityShandongChina department of orthopedics Tianjin Medical University General HospitalInternational Science and Technology Cooperation Base of Spinal Cord InjuryTianjin Key Laboratory of Spine and Spinal CordTianjinChina Faculty of Medicine and Health The Back Pain Research TeamSydney Musculoskeletal HealthThe Kolling InstituteUniversity of SydneySydneyNSWAustralia department of Spine Surgery Honghui HospitalXi’an Jiaotong UniversityXi’anShaanxi ProvinceChina department of Burns and Plastic Surgery The Fourth Medical Center of Chinese PLA General HospitalBeijingChina Faculty of Medicine and Health School of Health SciencesUniversity of SydneyNSWAustralia Sydney Spine Institute BurwoodSydneyNSWAustralia Laboratory of Epidemiology Tianjin Neurological InstituteDepartment of NeurologyTianjin Medical University General Hospital&Tianjin Neurological InstituteKey Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous SystemMinistry of Education and Tianjin CityTianjinChina department of orthopedics Henan Provincial People’s HospitalZhengzhouHenan ProvinceChina department of Spinal Surgery The Third Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina department of orthopedics The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina department of Spine Surgery Zhengzhou Orthopedics HospitalZhengzhouHenan ProvinceChina department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengduSichuan ProvinceChina department of orthopedics Xinqiao HospitalArmy Medical UniversityChongqingChina department of orthopedics The First Affiliated Hospital of China Medical UniversityShenyangLiaoning ProvinceChina department of Spinal Surgery Shengj

Traumatic spinal cord injury is potentially catastrophic and can lead to permanent disability or even *** has the largest population of patients with traumatic spinal cord *** studies of traumatic spinal cord injury in China have mostly been regional in scope;national-level studies have been *** the best of our knowledge,no national-level study of treatment status and economic burden has been *** retrospective study aimed to examine the epidemiological and clinical features,treatment status,and economic burden of traumatic spinal cord injury in China at the national *** included 13,465 traumatic spinal cord injury patients who were injured between January 2013 and December 2018 and treated in 30 hospitals in 11 provinces/municipalities representing all geographical divisions of *** epidemiological and clinical features,treatment status,and total and daily costs were *** in the percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department and cost of care were assessed by annual percentage change using the Joinpoint Regression *** percentage of traumatic spinal cord injuries among all hospitalized patients and among patients hospitalized in the orthopedic department did not significantly change overall(annual percentage change,-0.5%and 2.1%,respectively).A total of 10,053(74.7%)patients underwent *** 2.8%of patients who underwent surgery did so within 24 hours of injury.A total of 2005(14.9%)patients were treated with high-dose(≥500 mg)methylprednisolone sodium succinate/methylprednisolone(MPSS/MP);615(4.6%)received it within 8 *** total cost for acute traumatic spinal cord injury decreased over the study period(-4.7%),while daily cost did not significantly change(1.0%increase).Our findings indicate that public health initiatives should aim at improving hospitals’ability to complete early surgery within 24 ho

关键词： China clinical features costs epidemiology methylprednisolone sodium succinate methylprednisolone retrospective study traumatic spinal cord injury treatment

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Cemented vertebra and adjacent vertebra refractured in a chronic kidney disease-mineral and bone disorder patient: A case report

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World Journal of Clinical Cases 2024年第10期12卷 1804-1809页

作者： Ti-Dong Zhang Shuai Cao Hui-Yong Ren Yu-Min Li Yi-Ming Yuan department of orthopedics Civil Aviation General HospitalBeijing 100123China

BACKGROUND Although percutaneous vertebral augmentation(PVA)is a commonly used procedure for treating vertebral compression fracture(VCF),the risk of vertebral refracture should be *** kidney disease-mineral and bone disorder(CKD-MBD)is a systemic disease of mineral and bone *** is associated with an increased risk of *** studies have reported the use of PVA in patients with *** herein report a rare case wherein the cemented vertebra and the adjacent vertebra refractured simultaneously in a CKD-MBD patient after *** SUMMARY A 74-year-old man suffered from low back pain after taking a fall about 3 wk *** to physical examination,imaging and laboratory findings,diagnoses of T12 VCF,CKD-MBD,and chronic kidney disease stage 5 were *** then received percutaneous vertebroplasty at T12 *** weeks later,he presented with T12 and L1 vertebral refractures caused by lumbar *** again,he was given PVA which was optimized for the refractured *** the short-term postoperative effect was satisfactory,he reported chronic low back pain again at the 3-month *** It is necessary that patients with CKD-MBD who have received PVA are aware of the adverse effects of *** may increase the risk of vertebral ***,the PVA surgical technique needs to be optimized according to the condition of the *** medium-and long-term effects of PVA remain uncertain in patients with CKD-MBD.

关键词： Chronic kidney disease-mineral and bone disorder Percutaneous vertebral augmentation Vertebral compression fracture Vertebral refracture Cemented vertebra Adjacent vertebra Case report

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Exploring the therapeutic potential of Qi Teng Mai Ning recipe in ischemic stroke and vascular cognitive impairment

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Traditional Medicine Research 2024年第10期9卷 21-35页

作者： Jia-Yan Yao Yue-Lan Yang Wei-Jian Chen Hai-Ying Fan department of Neurosurgery Changxing People’s HospitalChangxing 313100China department of Ultrasound Medicine Changxing People’s HospitalChangxing 313100China department of orthopedics The Fifth Clinical College of Guangzhou University of Chinese MedicineGuangzhou 510095China

Background:this study aims to explore the therapeutic effects of the Qi Teng Mai Ning recipe on ischemic stroke and vascular cognitive impairment through its potential to modulate cellular autophagy,with a focus on identifying its active ingredients and their target ***:the study began with the identification of active ingredients in the Qi Teng Mai Ning *** proceeded to screen the gene expression omnibus database for ischemic stroke and vascular cognitive impairment-associated differentially expressed mRNAs and to identify cellular autophagy-related proteins via the Human Autophagy *** proteins were annotated with Gene Ontology and Kyoto Encyclopedia of Genes and Genomes functions and subjected to molecular docking with the recipe’s core active *** vitro cell experiments were conducted on hypoxic HT22 cells,involving CCK8 assay,lentiviral transfection to silence autophagy related 9B(ATG9B),immunofluorescence staining,and qPCR validation to investigate the effects of the recipe on ***:the analysis identified 104 active ingredients targeting 408 proteins and forming a complex ingredient-target *** 55 ischemic stroke-related and 909 vascular cognitive impairment-related differentially expressed mRNAs revealed 14 co-expressed *** docking showed quercetin,kaempferol,myrcene,and conferone as key ingredients targeting autophagy-related *** experiments indicated that the recipe significantly enhanced cell viability under hypoxic conditions,reduced apoptosis,and modulated the expression of autophagy-related factors,thereby decreasing apoptosis rates in HT22 ***:the Qi Teng Mai Ning recipe offers protective effects against ischemic stroke and vascular cognitive impairment by modulating autophagy-related *** efficacy highlights the potential of traditional Chinese medicine in treating these conditions,though further research is needed to fully understand its

关键词： Qi Teng Mai Ning recipe autophagy ischemic stroke vascular cognitive impairment traditional Chinese medicine

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