1.Multi-dimensional Holographic Characterization of Zhejiang Characteristic Atractylodis Macrocephalae Rhizoma with Nine-time Repeating Steaming and Processing
Xin WU ; Cuiwei CHEN ; Qiao YU ; Chao FENG ; Hongyan ZHANG ; Yan CHEN ; Caihua SUN ; Gang CAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(6):197-205
ObjectiveHistorically documented Zhejiang Atractylodis Macrocephalae Rhizoma(Baizhu) possesses premium characteristics such as phoenix-like head and crane-like neck, pronounced sweetness, and fragrant aroma. However, its current market circulation is low, and the processed products with Zhejiang-style characteristics are at the risk of being lost. This study aims to preserve the ancient Zhejiang-style processing techniques and evaluate them using modern scientific methods. MethodsMultidimensional intelligent sensory evaluation was used to digitally characterize the "quality-structure" of the external appearance of nine-steamed and nine-processed Baizhu medicinal materials(intermediate processed products) and the "odor-taste" of the internal quality of its decoction pieces(slices), and the appearance parameters were digitally characterized by colorimeter, texture analyzer, electronic nose and electronic tongue, the chemical composition was analyzed via ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS/MS). Then, cluster analysis on the differences in odor between the medicinal materials(intermediate processed products) and decoction pieces(slices) of nine-steamed and nine-processed Baizhu was conducted, as well as the differences in taste between water-soluble and alcohol-soluble extracts of the decoction pieces(slices), and the correlation analysis of chroma value-alcohol-soluble extract content-component response value. ResultsThe nine-steamed and nine-processed Baizhu had a dark brown to black epidermis, a brownish-yellow to brownish-gray cross-section, a slightly tough texture, a faint odor, and a slightly sweet, bitter and pungent taste. Texture analyzer measurements revealed minimal adhesion and maximum recovery in the middle section of the characteristic processed Baizhu, consistent with the processing endpoint of thorough steaming and cooking. The head section showed the highest internal hardness, elasticity and chewiness, indicating a denser texture in this area. The electronic nose sensor could clearly distinguish the difference between the medicinal materials and its decoction pieces, with a more significant clustering effect at 60 ℃ for 30 minutes compared to ambient temperature headspace for 2 hours, highlighting the significant impact of the baking degree before slicing on the quality. The electronic tongue taste signal map clearly distinguished the differences between water-soluble and alcohol-soluble extracts of nine-steamed and nine-processed Baizhu decoction pieces, and the addition of auxiliary materials during processing could enhance its alcohol-soluble extract content. A total of 82 chemical components were identified in the characteristic processed Baizhu. After processing, the contents of 58 components increased, while 24 components decreased. Correlation analysis revealed significant negative correlations(P<0.01) between ethanol-soluble extract content and colorimetric values of brightness(L*), yellow-bule value(b*), and total color difference(E*ab). E*ab showed marked negative correlations(P<0.05) with the response values of isochlorogenic acid A and C. ConclusionThis study establishes a modern intelligent sensory evaluation model for multidimensional holographic characterization of nine-steamed and nine-processed Baizhu, clarifying the correlation between increased isochlorogenic acid content and the visual color appearance after different steaming cycles, as well as its intrinsic alcohol-soluble extracts. This provides a reference for quality evaluation and processing standards of the Zhejiang-style characteristic processed products.
2.Mechanism of Wumeiwan on Inhibiting Fatty Acid Metabolism Reprogramming in Prevention and Treatment of Colorectal Cancer Based on Multi-omics Analysis
Gang XIAO ; Shusen YANG ; Mingming SI ; Yanyan YANG ; Hailiang WEI ; Shuguang YAN ; Hui LUO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):21-30
ObjectiveTo investigate the mechanism by which Wumeiwan suppresses the development and progression of colorectal cancer(CRC) through the regulation of fatty acid metabolic reprogramming, thereby providing new experimental evidence for the prevention and treatment of CRC. MethodsA total of 120 C57BL/6 mice were randomly divided into the blank group, model group, Wumeiwan high-, medium-, and low-dose groups(54, 27, 13.5 g·kg-1), and the mesalazine group(0.01 g·kg-1), with 20 mice in each group. Except for the blank group, all mice were subjected to azoxymethane(AOM)/dextran sulfate sodium(DSS) treatment to establish an inflammation-associated CRC model. One week after AOM injection, mice in the treatment groups received intragastric administration of the designated drugs, while the blank and model groups received an equal volume of purified water, continuing until 20 d after the intervention endpoint. Hematoxylin-eosin(HE) staining was used to observe colonic histopathological alterations, and immunohistochemistry for vascular endothelial growth factor(VEGF) was performed to evaluate neovascularization and tumor invasion. Metabolomics combined with Kyoto Encyclopedia of Genes and Genomes(KEGG) and metabolite set enrichment analysis(MSEA) was applied to identify key CRC-related metabolic pathways, which were further validated by transcriptomic Gene Ontology(GO) enrichment and gene heatmap analysis. Subsequently, Western blot was performed to determine the expression levels of core proteins in these pathways, and immunofluorescence was used to analyze their localization and co-expression patterns in tissues, thereby elucidating the mechanism of Wumeiwan from multiple biological dimensions. ResultsCompared with the blank group, mice in the model group exhibited a significant decrease in body weight and a significant increase in the disease activity index(DAI) score(P<0.05), with pronounced colonic mucosal damage accompanied by aggravated tumor invasion. Compared with the model group, Wumeiwan intervention markedly improved body weight loss and reduced DAI score, attenuated mucosal injury, and significantly decreased VEGF expression level(P<0.05). Multi-omics analysis revealed that differential metabolites and genes across groups were commonly enriched in fatty acid metabolism, fatty acid biosynthesis, and other lipid-related pathways. Relative to the blank group, the model group showed significant upregulation levels of fatty acid synthesis-related genes, including sterol regulatory element-binding protein 1(SREBP1), fatty acid synthase(FASN), stearoyl-CoA desaturase 1(SCD1), as well as saturated fatty acids(P<0.05). Compared with the model group, treatment with Wumeiwan significantly reduced the expression of key genes involved in fatty acid metabolic pathways, including SREBP1, FASN, and SCD1(P<0.05). Western blot results further confirmed that proteins in this pathway were significantly elevated in the model group, whereas they were markedly downregulated following Wumeiwan treatment(P<0.05). Immunofluorescence analysis demonstrated enhanced co-localization of SREBP1 with the cancer-associated fibroblast(CAF) marker α-smooth muscle actin(SMA) in the model group, whereas this co-localization signal was attenuated after Wumeiwan intervention(P<0.05). ConclusionWumeiwan can improve survival outcomes and alleviate colonic pathological damage in CRC mice, its therapeutic mechanism may be closely associated with the regulation of fatty acid metabolic reprogramming mediated by the SREBP1/FASN/SCD1 signaling pathway.
3.Expert consensus on visualized tele-round and quality control management based on the improvement of clinical practice ability
Wanhong YIN ; Xiaoting WANG ; Ran ZHOU ; Dawei LIU ; Yan KANG ; Yaoqing TANG ; Xiaochun MA ; Jianguo LI ; Zhenjie HU ; Haitao ZHANG ; Wei HE ; Lixia LIU ; Wenjin CHEN ; Ran ZHU ; Jun WU ; Hongmin ZHANG ; Lina ZHANG ; Wenzhao CHAI ; Shihong ZHU ; Wangbin XU ; Rongqing SUN ; Xiangyou YU ; Tianjiao SONG ; Ying ZHU ; Hong REN ; Ai SHANMU ; Qing ZHANG ; Wei FANG ; Xiuling SHANG ; Liwen LYU ; Shuhan CAI ; Xin DING ; Heng ZHANG ; Guang FENG ; Lipeng ZHANG ; Bo HU ; Dong ZHANG ; Weidong WU ; Feng SHEN ; Xiaojun YANG ; Zhenguo ZENG ; Qibing HUANG ; Xueying ZENG ; Tongjuan ZOU ; Milin PENG ; Yulong YAO ; Mingming CHEN ; Hui LIAN ; Jingmei WANG ; Yong LI ; Feng QU ; Gang YE ; Rongli YANG ; Xiukai CHEN ; Suwei LI ; Juxiang WANG ; Yangong CHAO
Chinese Journal of Internal Medicine 2025;64(2):101-109
Turning to critical illness is a common stage of various diseases and injuries before death. Patients usually have complex health conditions, while the treatment process involves a wide range of content, along with high requirements for doctor′s professionalism and multi-specialty teamwork, as well as a great demand for time-sensitive treatments. However, this is not matched with critical care professionals and the current state of medical care in China. Telemedicine, which shortens the distance of medical professionals and the gap of disease diagnosis and treatments in various regions through electronic information, can effectively solve the current problem. Therefore, there is an urgent need to develop a standardized, high-quality visualization telemedicine round system .Therefore, experts have been organized to search domestic and foreign literature on telemedicine round for critically ill patients and to form this consensus based on clinical experiences so as to further improve the level of critical care treatments in regions.
4.MR intravoxel incoherent motion for analysis of placental microcirculation and microstructures in plateau area of late pregnancy induced hypertension and normal middle and late pregnancy women
Fei LIU ; Zhanyue YAN ; Zhengning GAN ; Chenghuan LIU ; Shenglan WANG ; Linkui ZHANG ; Gang LIU
Chinese Journal of Medical Imaging Technology 2025;41(9):1554-1557
Objective To observe the value of MR intravoxel incoherent motion(IVIM)for analyzing placental microcirculation and microstructures in plateau area of late pregnancy induced hypertension(PIH)and normal middle and late pregnancy.Methods Totally 26 cases of PIH in late-trimester of pregnancy(group A)and 46 normal pregnant women(including 18 normal middle-trimester[group B]and 28 normal late-trimester[group C])in plateau area were retrospectively analyzed.The perfusion fraction(f),true diffusion coefficient(D)and pseudo-diffusion coefficient(D*)values of the entire placenta and the fetal side,maternal side and central region of placenta were obtained based on MR IVIM data,intra-and inter-group comparisons were conducted.Pearson correlation analysis was used to explore the relationships of placental IVIM parameters and maternal age,gestational age,estimated fetal weight(EFW)and neonatal birth weight.Results Except for f value of placental maternal side was higher than of fetal side in group C(P<0.05),no significant difference was found in pairwise comparisons of IVIM parameters between different placental regions within each group(all P>0.05).f value of the entire placenta and its fetal side,as well as D value of the entire placenta and its maternal side in group A were all higher than those in group C(all adjusted P<0.05).The f and D* values of the entire placenta,f,D and D*values of its maternal side,as well as f and D* values of the fetal side in group C were all higher than those in group B(all adjusted P<0.05).In group C,f value of placental maternal side was negatively correlated with both gestational age and EFW(r=-0.441,-0.579,both P<0.01).Conclusion MR IVIM could be used to non-invasively assess placental microcirculation and microstructures in plateau area of late PIH and normal middle and late pregnancy women.
5.Effects of Changpu Yujin Decoction on mitophagy and PINK1/Parkin signaling pathway in a rat model of Tourette syndrome
Shuang HUANG ; Ya-li YAN ; Hao MEI ; Jing-xi YAO ; Fu-chun XUE ; Jing SHANG ; Yan TANG ; Zheng-gang SHI
Chinese Traditional Patent Medicine 2025;47(10):3225-3232
AIM To investigate the effects of Changpu Yujin Decoction(CPYJD)on striatal mitophagy and PINK1/Parkin signaling pathway in a rat model of Tourette syndrome(TS).METHODS Thirty-six SPF male SD rats were randomly assigned to the control group(n=9)and the TS modeling group(n=27).Rats in the modeling group received daily intraperitoneal injections of 3,3'-iminodipropionitrile(IDPN)(300 mg/kg)for 7 consecutive days to establish the TS model.Post-modeling,successfully induced TS rats were re-randomized into model group(no treatment),tiapride group(47.91 mg/kg)and CPYJD group(77.28 g/kg).All groups received their respective interventions via intragastric administration daily for 28 days.Following drug administration,behavioral scores were assessed in each group.Pathological alterations in the striatum were examined using HE staining,while ultrastructural changes were evaluated by transmission electron microscopy(TEM).Neuronal apoptosis was quantified via TUNEL staining,and ROS levels in striatum were measured by ELISA.Co-localization of PINK1 and LC3B was assessed using immunofluorescence(IF).Finally,mRNA and protein expressions of PINK1,Parkin,Beclin-1,P62 and LC3B(LC3B-Ⅱ/Ⅰ ratio)were analyzed by RT-qPCR and Western blot.RESULTS Compared to the control group,the model group demonstrated significantly increased behavioral scores(P<0.01),elevated neuronal apoptosis rate and higher ROS levels in the striatum(P<0.01);severe neuronal and mitochondrial damage in the striatum;significantly reduced mRNA and protein expressions of PINK1,Parkin,Beclin-1 and LC3B(LC3B-Ⅱ/Ⅰ ratio)in the striatum(P<0.01);markedly upregulated P62 mRNA and protein expressions(P<0.01).Compared to the model group,both the tiapride and CPYJD intervention groups exhibited significantly reduced behavioral scores(P<0.01);decreased neuronal apoptosis rate and lower ROS levels(P<0.01);improved pathological alterations in the striatal neurons and mitochondria;increased mRNA and protein expressions of PINK1,Parkin and Beclin-1 in the striatum(P<0.05,P<0.01);and decreased P62 mRNA and protein expressions(P<0.01).Furthermore,the rats in the CPYJD group specifically showed elevated LC3B mRNA level and LC3B-Ⅱ/Ⅰ protein ratio in striatum(P<0.05,P<0.01).CONCLUSION The effect of CPYJD intervention in TS rats may involve activation of mitophagy through regulation of the PINK1/Parkin signaling pathway,improving mitochondrial function,reducing ROS levels,and thereby protecting neurons.
6.Development and Initial Use of a New Inflammatory Bowel Disease Clinical Database Integrating Both Eastern and Western Clinical Characteristics
Jingshuang YAN ; Rongrong REN ; Ruqi CHANG ; Wanyue DAN ; Xiaohan ZHANG ; Fei PAN ; Bin YAN ; Hongzhe LEE ; Ni JOSIE ; Gang SUN ; Lihua PENG ; Wu Gary D. ; Yunsheng YANG
Chronic Diseases and Translational Medicine 2025;11(2):130-139
Background::The increasing incidence of inflammatory bowel disease (IBD) presents significant medical and societal challenges. A well-designed IBD database is crucial for both epidemiological studies and clinical management. However, inconsistencies between regional databases hinder cross-institutional and international research, especially between Eastern and Western societies.Methods::We developed a new IBD database, the 301 IBD database, integrating the IBD clinical characteristics from the Penn IBD database (USA) and the latest IBD guidelines and consensus and clinical practices of the Chinese PLA General Hospital (PLAGH). We applied this database to analyze clinical data of IBD inpatients at PLAGH from 2008 to 2023.Results::The 301 IBD database contains 490 items in 6 sections including demographic characteristics, personal history, clinical phenotype, disease activity, laboratory tests and examinations, and treatment. Features of the 301 IBD database include inpatient focus, biochemical indicators and opportunistic infection focus, and more about ulcerative colitis (UC)-associated complications. Single-center analysis revealed an increasing hospitalization trend, from 2.35% in 2008 to 3.94% in 2023. We found that the clinical characteristics of our UC inpatients are predominantly male (62.5%), extensive lesions (55.1%), low usage of biologics (4.1%), and a high incidence of UC-CRC (3.0%). The clinical characteristics of CD inpatients included male predominance (68.39%), early onset age (35.43 ± 14.75-year-old), and high rate of surgery (25.81%).Conclusion::The 301 IBD database, integrating Eastern and Western clinical data, provides a valuable tool for IBD clinical research. Future international, multicenter collaborations are expected to further enhance its utility.
7.Exploration of the efficacy and safety of indocyanine green in the evaluation and localization of breast cancer surgical margins:a single-center,observational cohort study
Gang LÜ ; Guangqing WANG ; Yan ZHENG ; Qin TANG ; Fei CHEN ; Xudong YU ; Shengqi XU ; Fayang TANG ; Jibiao ZHU
China Oncology 2025;35(8):776-783
Background and purpose:In breast cancer surgery,margin status assessment significantly impacts patient prognosis,with positive margins indicating higher recurrence and metastasis risks.Ensuring complete tumor resection is thus critical for surgical success.Indocyanine green(ICG)has garnered attention for its potential real-time imaging of breast cancer lesions under near-infrared light.This study employed ICG for intraoperative assessment of breast cancer lesion margin status and further explored the possibility of optimizing the safe margin distance surround the lesion in normal breast tissue.Methods:Clinical data of patients admitted to the Department of Thyroid and Breast Surgery,the Fourth Affiliated Hospital of Anhui Medical University(Affiliated Chaohu Hospital),from December 2021 to September 2022 were collected.A retrospective clinical study was conducted on breast cancer patients who were randomly assigned to either the ICG group or the conventional surgery group.Two to three hours before surgery,patients in the ICG group received a peripheral intravenous injection of 0.5 mg/kg ICG.Intraoperative fluorescence imaging was performed on the specimen before and after resection,as well as on the residual cavity.Near-infrared fluorescence imaging equipment was used to quantitatively measure fluorescence intensity of resected lesions at 4 directions(12,3,6,and 9 o'clock)and detect fluorescence in the residual cavity after lesion removal.Specimens were promptly sent to the pathology department for pathological examination,and safety margins of normal breast tissue in the 4 directions were recorded.The Strengthening the Reporting of Observational Studies in Epidemiology(STROBE)checklist was followed for this study.This study was approved by the Ethics Committee of the Fourth Affiliated Hospital of Anhui Medical University(Affiliated Chaohu Hospital)(No.KYXM-202310-46).Results:This study included 50 breast cancer patients,with 24 in the ICG group and 26 in the traditional surgery group.In the ICG group,fluorescence signals were detected at all lesion sites.Specifically,fluorescence density values at the lesion center,margin,and surrounding normal breast tissue were measured as 251.08±10.73,208.08±19.74,and 156.76±16.47,respectively,showing a gradual decrease from center outward with statistically significant differences(P<0.05).Additionally,fluorescence ratios between the lesion center and margin,and center and surrounding normal tissue,were 1.22±0.13 and 1.62±0.19,respectively.After resection,abnormal fluorescence was observed in 2 of 24 cases in the residual cavity,with 1 case being invasive carcinoma with ductal carcinoma in situ and the other normal breast tissue.Ultimately,this study demonstrated that ICG achieved a sensitivity of 95.9%and a specificity of 97.9%in margin assessment.After specimen resection,the safety margins of normal glandular tissue surrounding the lesion were measured.The safety widths for the ICG group and the concurrent breast cancer surgery group were(8.36±6.42)mm and(15.08±4.75)mm,respectively.This difference was statistically significant(P<0.05).Conclusion:ICG is a real-time,efficient,and cost-effective tracer that can be used to determine breast cancer margins,with excellent sensitivity and specificity.For early-stage breast cancer patients who are eligible for breast-conserving surgery,this tracer helps to reduce the amount of healthy breast tissue that is removed around the lesion.
8.Jiawei Xiaoyao Pills improves depression-like behavior in rats by regulating neurotransmitters, inhibiting inflammation and oxidation and modulating intestinal flora.
Ying LIU ; Borui LI ; Yongcai LI ; Lubo CHANG ; Jiao WANG ; Lin YANG ; Yonggang YAN ; Kai QV ; Jiping LIU ; Gang ZHANG ; Xia SHEN
Journal of Southern Medical University 2025;45(2):347-358
OBJECTIVES:
To explore the bioactive components in Jiawei Xiaoyao Pills (JWXYP) and their mechanisms for alleviating depression-like behaviors.
METHODS:
The active compounds, key targets, and pathways of JWXYP were identified using TCMSP and TCMIP databases. Thirty-six SD rats were randomized equally into 6 groups including a control group and 5 chronic unpredictable mild stress (CUMS)-induced depression groups. After modeling, the 5 model groups were treated with daily gavage of normal saline, 1.8 mg/kg fluoxetine hydrochloride (positive control drug), or JWXYP at 1.44, 2.88, and 4.32 g/kg. The depression-like behaviors of the rats were evaluated using behavioral tests, and pathological changes in the liver and hippocampus were examined with HE staining. The biochemical indicators in the serum and brain tissues were detected using ELISA. Serum metabolomics analysis was performed to identify the differential metabolites using OPLS-DA, and gut microbiota changes were analyzed using 16S rDNA sequencing.
RESULTS:
Network pharmacology revealed that menthone and paeonol in JWXYP were capable of penetrating the blood-brain barrier to regulate inflammatory pathways and protect the nervous system. In the rat models subjected to CUMS, treatment with JWXYP significantly improved body weight loss, sucrose preference and open field activities, reduced liver inflammation, alleviated structural changes in the hippocampal neurons, decreased serum levels of TNF‑α, IL-1β, IL-6 and LBP, and increased 5-HT and VIP concentrations in the serum and brain tissue, and these effects were the most pronounced in the high-dose group. Metabolomics analysis showed changes in such metabolites as indole-3-acetamide and acetyl-L-carnitine in JWXYP-treated rats, involving the pathways for bile acid biosynthesis and amino acid metabolism. 16S rDNA analysis demonstrated increased gut microbiota diversity and increased abundance of Lactobacillus species in JWXYP-treated rats.
CONCLUSIONS
JWXYP alleviates depression-like symptoms in rats by regulating the neurotransmitters, inhibiting inflammation and oxidation, and modulating gut microbiota.
Animals
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Drugs, Chinese Herbal/therapeutic use*
;
Gastrointestinal Microbiome/drug effects*
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Rats, Sprague-Dawley
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Depression/drug therapy*
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Neurotransmitter Agents/metabolism*
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Rats
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Inflammation
;
Male
;
Hippocampus
;
Behavior, Animal/drug effects*
9.Epidemiology of atrial fibrillation/atrial flutter and its risk factors from 1990 to 2021: a systematic analysis and Mendelian randomization study based on the China and Global Burden of Disease Study 2021.
Huihua MA ; Kuipo YAN ; Gang LIU ; Yazhou XU ; Lei ZHANG ; Yizhuo LI
Journal of Southern Medical University 2025;45(10):2182-2190
OBJECTIVES:
To analyze the changes in disease burden and risk factors of atrial fibrillation/atrial flutter (AF/AFL) in China and globally from 1990 to 2021 to provide epidemiological evidence for developing effective preventive measures for AF/AFL in China.
METHODS:
Based on data from the Global Burden of Disease Study 2021, we analyzed sex- and age-specific AF/AFL burden metrics across 204 countries or territories. Age-standardized incidence rate (ASIR), prevalence, mortality rate (ASMR), and disability-adjusted life-years (DALYs) rate (ASDR) were calculated. Joinpoint regression was employed to compute average annual percentage changes (AAPC) in trends. The risk factors were systematically evaluated and further validated using Mendelian randomization analysis.
RESULTS:
From 1990 to 2021, China experienced an increase in ASIR of AF/AFL (from 42.63 to 44.93 per 100 000), contrasting with the global decline. While China's ASMR decreased (from 4.93 to 4.33 per 100 000), global ASMR rose slightly (from 4.24 to 4.36 per 100 000). China's ASDR remained stable at 93.29 per 100 000, whereas global ASDR increased marginally (100.81 to 101.40 per 100 000). Significant sex disparities were observed: males showed higher ASIR and ASDR, while females exhibited greater ASMR and ASDR. China had higher incidence and prevalence but lower mortality and DALY rates compared to global averages. In 2021, the key risk factors for AF/AFL included elevated systolic blood pressure, high BMI, smoking, alcohol use, high-sodium diet, and low temperature. Gender-specific patterns emerged: smoking was predominant in males, whereas high BMI disproportionately affected females.
CONCLUSIONS
AF/AFL incidence and prevalence keep increasing in China, and its large population base and demographic aging pose significant public health challenges. Maintaining healthy lifestyle habits, including smoking cessation, alcohol moderation, and a low-sodium diet can help to lower AF/AFL incidence, and regular screenings is crucial for its early detection and treatment.
Humans
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China/epidemiology*
;
Risk Factors
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Atrial Flutter/epidemiology*
;
Atrial Fibrillation/epidemiology*
;
Mendelian Randomization Analysis
;
Male
;
Female
;
Global Burden of Disease
;
Incidence
;
Prevalence
;
Middle Aged
;
Disability-Adjusted Life Years
;
Aged
10.Autophagy in Oligodendrocyte Lineage Cells Controls Oligodendrocyte Numbers and Myelin Integrity in an Age-dependent Manner.
Hong CHEN ; Gang YANG ; De-En XU ; Yu-Tong DU ; Chao ZHU ; Hua HU ; Li LUO ; Lei FENG ; Wenhui HUANG ; Yan-Yun SUN ; Quan-Hong MA
Neuroscience Bulletin 2025;41(3):374-390
Oligodendrocyte lineage cells, including oligodendrocyte precursor cells (OPCs) and oligodendrocytes (OLs), are essential in establishing and maintaining brain circuits. Autophagy is a conserved process that keeps the quality of organelles and proteostasis. The role of autophagy in oligodendrocyte lineage cells remains unclear. The present study shows that autophagy is required to maintain the number of OPCs/OLs and myelin integrity during brain aging. Inactivation of autophagy in oligodendrocyte lineage cells increases the number of OPCs/OLs in the developing brain while exaggerating the loss of OPCs/OLs with brain aging. Inactivation of autophagy in oligodendrocyte lineage cells impairs the turnover of myelin basic protein (MBP). It causes MBP to accumulate in the cytoplasm as multimeric aggregates and fails to be incorporated into integral myelin, which is associated with attenuated endocytic recycling. Inactivation of autophagy in oligodendrocyte lineage cells impairs myelin integrity and causes demyelination. Thus, this study shows autophagy is required to maintain myelin quality during aging by controlling the turnover of myelin components.
Animals
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Autophagy/physiology*
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Oligodendroglia/metabolism*
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Myelin Sheath/physiology*
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Aging/pathology*
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Myelin Basic Protein/metabolism*
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Cell Lineage/physiology*
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Mice
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Oligodendrocyte Precursor Cells
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Mice, Inbred C57BL
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Brain/cytology*
;
Cells, Cultured
;
Cell Count

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