1.Treatment Principles and Paradigm of Diabetic Microvascular Complications Responding Specifically to Traditional Chinese Medicine
Anzhu WANG ; Xing HANG ; Lili ZHANG ; Xiaorong ZHU ; Dantao PENG ; Ying FAN ; Min ZHANG ; Wenliang LYU ; Guoliang ZHANG ; Xiai WU ; Jia MI ; Jiaxing TIAN ; Wei ZHANG ; Han WANG ; Yuan XU ; .LI PINGPING ; Zhenyu WANG ; Ying ZHANG ; Dongmei SUN ; Yi HE ; Mei MO ; Xiaoxiao ZHANG ; Linhua ZHAO
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(5):272-279
To explore the advantages of traditional Chinese medicine (TCM) and integrative TCM-Western medicine approaches in the treatment of diabetic microvascular complications (DMC), refine key pathophysiological insights and treatment principles, and promote academic innovation and strategic research planning in the prevention and treatment of DMC. The 38th session of the Expert Salon on Diseases Responding Specifically to Traditional Chinese Medicine, hosted by the China Association of Chinese Medicine, was held in Beijing, 2024. Experts in TCM, Western medicine, and interdisciplinary fields convened to conduct a systematic discussion on the pathogenesis, diagnostic and treatment challenges, and mechanism research related to DMC, ultimately forming a consensus on key directions. Four major research recommendations were proposed. The first is addressing clinical bottlenecks in the prevention and control of DMC by optimizing TCM-based evidence evaluation systems. The second is refining TCM core pathogenesis across DMC stages and establishing corresponding "disease-pattern-time" framework. The third is innovating mechanism research strategies to facilitate a shift from holistic regulation to targeted intervention in TCM. The fourth is advancing interdisciplinary collaboration to enhance the role of TCM in new drug development, research prioritization, and guideline formulation. TCM and integrative approaches offer distinct advantages in managing DMC. With a focus on the diseases responding specifically to TCM, strengthening evidence-based support and mechanism interpretation and promoting the integration of clinical care and research innovation will provide strong momentum for the modernization of TCM and the advancement of national health strategies.
2.Mechanism of Xixintang in Protecting Blood-brain Barrier in Alzheimer's Disease Model Rats Based on AQP4 Polarization
Siyuan JIA ; Yongchang DIWU ; Yuan TIAN ; Jie GAO ; Meirong WU ; Dengkun WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):1-10
ObjectiveThis paper aims to investigate the effects of Xixintang on aquaporin-4 (AQP4) polarity distribution, blood-brain barrier (BBB) function, and neuroinflammationin rats with Alzheimer's disease (AD), thereby revealing the potential mechanism through which this formula protects the BBB by regulating AQP4 polarization. The aim is to provide a scientific basis for clinical treatment. MethodsSixty Sprague-Dawley (SD) rats were randomly divided into a normal group, a model group, a probiotic group, a donepezil group, and an Xixintang group. The model was established by intraperitoneal injection of D-galactose (D-Gal) combined with bilateral intracerebroventricular injection of amyloid-β25-35 (Aβ25-35). The probiotic group (30.85 mg·kg-1), donepezil group (0.88 mg·kg-1), and Xixintang group (1.174 g·kg-1) received daily gavage administration, while the normal and model groups received intragastric administration with an equal volume of normal saline for one month. Cognitive ability was assessed by using the Morris water maze. BBB permeability was detected via Evans blue extravasation. The contents of interleukin-6 (IL-6), amyloid-β1-42 (Aβ1-42), and tumor necrosis factor-α (TNF-α) in the hippocampal tissues were measured by enzyme-linked immunosorbent assay (ELISA). The protein expressions of zonula occludens-1 (ZO-1), occludin, tissue inhibitor of metalloproteinase-1 (TIMP-1), matrix metalloproteinase-9 (MMP-9), and AQP4 in the hippocampal tissues were detected by western blot. The expression and co-localization levels of Aβ1-42, ionized calcium-binding adapter molecule 1 (IBA1), and AQP4/platelet endothelial cell adhesion molecule 31 (CD31) in the hippocampal region were examined by immunofluorescence. ResultsCompared with the normal group, the model group exhibited a significant decline in cognitive ability (P<0.01) and a marked increase in Evans blue extravasation in the brain (P<0.01). The expressions of ZO-1, occludin, and TIMP-1 were significantly decreased (P<0.01), while the expressions of AQP4 and MMP-9 were significantly increased (P<0.01). The co-localization level of AQP4/CD31 was significantly reduced (P<0.01), and the expressions of Aβ1-42, IL-6, TNF-α, and IBA1 were significantly elevated (P<0.01). Compared with the model group, the Xixintang group showed significant improvement in cognitive ability (P<0.01) and a significant reduction in Evans blue extravasation in the brain (P<0.01). The expressions of occludin, TIMP-1, and ZO-1 were significantly increased (P<0.05, P<0.01), while the expressions of AQP4 and MMP-9 were significantly decreased (P<0.05). The co-localization level of AQP4/CD31 was significantly enhanced (P<0.01), and the expressions of Aβ1-42, IL-6, TNF-α, and IBA1 were significantly reduced (P<0.05, P<0.01). ConclusionXixintang may improve cognitive function and alleviate AD pathology in AD model rats by regulating AQP4 polarity distribution, thereby breaking the vicious cycle of "Aβ deposition-neuroinflammation-BBB damage" and restoring the homeostasis of the microenvironment in the brain.
3.Effect of Xixintang on Colonic Mucosal Barrier and TLR4 /NF-κB p65 Signaling Pathway in AD Model Rats Induced by D-galactose Combined with Aβ25-35
Yuan TIAN ; Yongchang DIWU ; Siyuan JIA ; Jie GAO ; Meirong WU ; Dengkun WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):1-11
ObjectiveThis study aims to investigate whether Xixintang could ameliorate cognitive dysfunction in an Alzheimer's disease (AD) rat model induced by D-galactose and β-amyloid (Aβ25-35), by means of repairing the colonic mucosal barrier, regulating the Toll-like receptor 4 (TLR4)/nuclear factor-κB p65 (NF-κB p65) signaling pathway, and intervening in the pathological process mediated by the gut-brain axis. MethodsSixty specific pathogen-free (SPF) male Sprague-Dawley (SD) rats were randomly divided to five groups (n=12): A control group, a model group, a donepezil group, an Xixintang group, and a probiotic group. Except for those in the control group, rats in all other groups received daily intraperitoneal injections of D-galactose for six consecutive weeks. Subsequently, aggregated Aβ25-35 was injected stereotactically into the bilateral ventricles to establish the AD model. During the intervention periods, the rats in all groups were administered their respective drugs and normal saline by gavage. The Morris water maze test was used to assess the capacity for spatial learning and memory. Hematoxylin-eosin (HE) staining was employed to observe the histopathological changes in the colon tissues. Immunofluorescence was used to detect Aβ1-41 deposition in the hippocampal region and Mucin 2 (MUC2) expression in the colonic mucosa. Western blot was performed to measure the protein expression levels of FFAR2,TLR4, NF-κB p65, occludin (OCLN), zonula occludens-1 (ZO-1), and MUC2 in the colonic tissues. Enzyme-linked immunosorbent assay (ELISA) was used to determine the contents of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), serum amyloid A (SAA), and Aβ1-42 in the hippocampal region from the colonic tissues. The lipopolysaccharide (LPS) concentrations in colon tissues of rats were measured by using a dynamic chromogenic limulus assay. ResultsCompared with those in the control group, the rats in the model group exhibited a significantly prolonged escape latency and a markedly shorter duration in the target quadrant (P<0.01). The integrity of the colonic mucosal structure was compromised, with disordered gland arrangement and a reduced number of goblet cells. The Aβ1-42 deposition in the hippocampal region was significantly increased (P<0.01). The protein expression levels of TLR4 and NF-κB p65 in colonic tissues were significantly upregulated (P<0.01), while those of occludin and ZO-1 were downregulated (P<0.01). The contents of inflammatory factors such as IL-6, TNF-α, and SAA were significantly elevated (P<0.01), and the LPS level in the serum was markedly increased (P<0.01). In comparison to those in the model group, the rats in the Xixintang group showed a significantly shortened escape latency and a prolonged duration in the target quadrant (P<0.01). The colonic mucosal structure was ameliorated, with neat gland arrangement and an increased number of goblet cells. The Aβ1-42 deposition in the hippocampal region was reduced (P<0.01). The protein expressions of TLR4 and NF-κB p65 in the colon tissues were decreased (P<0.05,P<0.01), while the protein levels of occludin and ZO-1 were increased (P<0.01). The contents of IL-6, TNF-α, and serum amyloid A (SAA) were decreased (P<0.01), and the LPS level was reduced (P<0.01). ConclusionXixintang can significantly ameliorate cognitive dysfunction of AD model rats, by means of restoring the colonic mucosal barrier structure, reducing cerebral Aβ deposition, and suppressing peripheral and central inflammatory response. Its mechanism of action may be closely associated with the suppression of the TLR4/NF-κB signaling pathway activation, reduction of endotoxin levels, and regulation of the gut-brain axis.
4.Effect of Xixintang on Colonic Mucosal Barrier and TLR4 /NF-κB p65 Signaling Pathway in AD Model Rats Induced by D-galactose Combined with Aβ25-35
Yuan TIAN ; Yongchang DIWU ; Siyuan JIA ; Jie GAO ; Meirong WU ; Dengkun WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):1-11
ObjectiveThis study aims to investigate whether Xixintang could ameliorate cognitive dysfunction in an Alzheimer's disease (AD) rat model induced by D-galactose and β-amyloid (Aβ25-35), by means of repairing the colonic mucosal barrier, regulating the Toll-like receptor 4 (TLR4)/nuclear factor-κB p65 (NF-κB p65) signaling pathway, and intervening in the pathological process mediated by the gut-brain axis. MethodsSixty specific pathogen-free (SPF) male Sprague-Dawley (SD) rats were randomly divided to five groups (n=12): A control group, a model group, a donepezil group, an Xixintang group, and a probiotic group. Except for those in the control group, rats in all other groups received daily intraperitoneal injections of D-galactose for six consecutive weeks. Subsequently, aggregated Aβ25-35 was injected stereotactically into the bilateral ventricles to establish the AD model. During the intervention periods, the rats in all groups were administered their respective drugs and normal saline by gavage. The Morris water maze test was used to assess the capacity for spatial learning and memory. Hematoxylin-eosin (HE) staining was employed to observe the histopathological changes in the colon tissues. Immunofluorescence was used to detect Aβ1-41 deposition in the hippocampal region and Mucin 2 (MUC2) expression in the colonic mucosa. Western blot was performed to measure the protein expression levels of FFAR2,TLR4, NF-κB p65, occludin (OCLN), zonula occludens-1 (ZO-1), and MUC2 in the colonic tissues. Enzyme-linked immunosorbent assay (ELISA) was used to determine the contents of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), serum amyloid A (SAA), and Aβ1-42 in the hippocampal region from the colonic tissues. The lipopolysaccharide (LPS) concentrations in colon tissues of rats were measured by using a dynamic chromogenic limulus assay. ResultsCompared with those in the control group, the rats in the model group exhibited a significantly prolonged escape latency and a markedly shorter duration in the target quadrant (P<0.01). The integrity of the colonic mucosal structure was compromised, with disordered gland arrangement and a reduced number of goblet cells. The Aβ1-42 deposition in the hippocampal region was significantly increased (P<0.01). The protein expression levels of TLR4 and NF-κB p65 in colonic tissues were significantly upregulated (P<0.01), while those of occludin and ZO-1 were downregulated (P<0.01). The contents of inflammatory factors such as IL-6, TNF-α, and SAA were significantly elevated (P<0.01), and the LPS level in the serum was markedly increased (P<0.01). In comparison to those in the model group, the rats in the Xixintang group showed a significantly shortened escape latency and a prolonged duration in the target quadrant (P<0.01). The colonic mucosal structure was ameliorated, with neat gland arrangement and an increased number of goblet cells. The Aβ1-42 deposition in the hippocampal region was reduced (P<0.01). The protein expressions of TLR4 and NF-κB p65 in the colon tissues were decreased (P<0.05,P<0.01), while the protein levels of occludin and ZO-1 were increased (P<0.01). The contents of IL-6, TNF-α, and serum amyloid A (SAA) were decreased (P<0.01), and the LPS level was reduced (P<0.01). ConclusionXixintang can significantly ameliorate cognitive dysfunction of AD model rats, by means of restoring the colonic mucosal barrier structure, reducing cerebral Aβ deposition, and suppressing peripheral and central inflammatory response. Its mechanism of action may be closely associated with the suppression of the TLR4/NF-κB signaling pathway activation, reduction of endotoxin levels, and regulation of the gut-brain axis.
5.Effect of Anti-reflux Mucosal Ablation on Esophageal Motility in Patients With Gastroesophageal Reflux Disease: A Study Based on High-resolution Impedance Manometry
Chien-Chuan CHEN ; Chu-Kuang CHOU ; Ming-Ching YUAN ; Kun-Feng TSAI ; Jia-Feng WU ; Wei-Chi LIAO ; Han-Mo CHIU ; Hsiu-Po WANG ; Ming-Shiang WU ; Ping-Huei TSENG
Journal of Neurogastroenterology and Motility 2025;31(1):75-85
Background/Aims:
Anti-reflux mucosal ablation (ARMA) is a promising endoscopic intervention for proton pump inhibitor (PPI)-dependent gastroesophageal reflux disease (GERD). However, the effect of ARMA on esophageal motility remains unclear.
Methods:
Twenty patients with PPI-dependent GERD receiving ARMA were prospectively enrolled. Comprehensive self-report symptom questionnaires, endoscopy, 24-hour impedance-pH monitoring, and high-resolution impedance manometry were performed and analyzed before and 3 months after ARMA.
Results:
All ARMA procedures were performed successfully. Symptom scores, including GerdQ (11.16 ± 2.67 to 9.11 ± 2.64, P = 0.026) and reflux symptom index (11.63 ± 5.62 to 6.11 ± 3.86, P = 0.001), improved significantly, while 13 patients (65%) reported discontinuation of PPI. Total acid exposure time (5.84 ± 4.63% to 2.83 ± 3.41%, P = 0.024) and number of reflux episodes (73.05 ± 19.34 to 37.55 ± 22.71, P < 0.001) decreased significantly after ARMA. Improved esophagogastric junction (EGJ) barrier function, including increased lower esophageal sphincter resting pressure (13.89 ± 10.78 mmHg to 21.68 ± 11.5 mmHg, P = 0.034), 4-second integrated relaxation pressure (5.75 ± 6.42 mmHg to 9.99 ± 5.89 mmHg, P = 0.020), and EGJ-contractile integral(16.42 ± 16.93 mmHg · cm to 31.95 ± 21.25 mmHg · cm, P = 0.016), were observed. Esophageal body contractility also increased significantly (distal contractile integral, 966.85 ± 845.84 mmHg · s · cm to 1198.8 ± 811.74 mmHg · s · cm, P = 0.023). Patients with symptom improvement had better pre-AMRA esophageal body contractility.
Conclusions
ARMA effectively improves symptoms and reflux burden, EGJ barrier function, and esophageal body contractility in patients with PPIdependent GERD during short-term evaluation. Longer follow-up to clarify the sustainability of ARMA is needed.
6.Effect of Anti-reflux Mucosal Ablation on Esophageal Motility in Patients With Gastroesophageal Reflux Disease: A Study Based on High-resolution Impedance Manometry
Chien-Chuan CHEN ; Chu-Kuang CHOU ; Ming-Ching YUAN ; Kun-Feng TSAI ; Jia-Feng WU ; Wei-Chi LIAO ; Han-Mo CHIU ; Hsiu-Po WANG ; Ming-Shiang WU ; Ping-Huei TSENG
Journal of Neurogastroenterology and Motility 2025;31(1):75-85
Background/Aims:
Anti-reflux mucosal ablation (ARMA) is a promising endoscopic intervention for proton pump inhibitor (PPI)-dependent gastroesophageal reflux disease (GERD). However, the effect of ARMA on esophageal motility remains unclear.
Methods:
Twenty patients with PPI-dependent GERD receiving ARMA were prospectively enrolled. Comprehensive self-report symptom questionnaires, endoscopy, 24-hour impedance-pH monitoring, and high-resolution impedance manometry were performed and analyzed before and 3 months after ARMA.
Results:
All ARMA procedures were performed successfully. Symptom scores, including GerdQ (11.16 ± 2.67 to 9.11 ± 2.64, P = 0.026) and reflux symptom index (11.63 ± 5.62 to 6.11 ± 3.86, P = 0.001), improved significantly, while 13 patients (65%) reported discontinuation of PPI. Total acid exposure time (5.84 ± 4.63% to 2.83 ± 3.41%, P = 0.024) and number of reflux episodes (73.05 ± 19.34 to 37.55 ± 22.71, P < 0.001) decreased significantly after ARMA. Improved esophagogastric junction (EGJ) barrier function, including increased lower esophageal sphincter resting pressure (13.89 ± 10.78 mmHg to 21.68 ± 11.5 mmHg, P = 0.034), 4-second integrated relaxation pressure (5.75 ± 6.42 mmHg to 9.99 ± 5.89 mmHg, P = 0.020), and EGJ-contractile integral(16.42 ± 16.93 mmHg · cm to 31.95 ± 21.25 mmHg · cm, P = 0.016), were observed. Esophageal body contractility also increased significantly (distal contractile integral, 966.85 ± 845.84 mmHg · s · cm to 1198.8 ± 811.74 mmHg · s · cm, P = 0.023). Patients with symptom improvement had better pre-AMRA esophageal body contractility.
Conclusions
ARMA effectively improves symptoms and reflux burden, EGJ barrier function, and esophageal body contractility in patients with PPIdependent GERD during short-term evaluation. Longer follow-up to clarify the sustainability of ARMA is needed.
7.Update on the treatment navigation for functional cure of chronic hepatitis B: Expert consensus 2.0
Di WU ; Jia-Horng KAO ; Teerha PIRATVISUTH ; Xiaojing WANG ; Patrick T.F. KENNEDY ; Motoyuki OTSUKA ; Sang Hoon AHN ; Yasuhito TANAKA ; Guiqiang WANG ; Zhenghong YUAN ; Wenhui LI ; Young-Suk LIM ; Junqi NIU ; Fengmin LU ; Wenhong ZHANG ; Zhiliang GAO ; Apichat KAEWDECH ; Meifang HAN ; Weiming YAN ; Hong REN ; Peng HU ; Sainan SHU ; Paul Yien KWO ; Fu-sheng WANG ; Man-Fung YUEN ; Qin NING
Clinical and Molecular Hepatology 2025;31(Suppl):S134-S164
As new evidence emerges, treatment strategies toward the functional cure of chronic hepatitis B are evolving. In 2019, a panel of national hepatologists published a Consensus Statement on the functional cure of chronic hepatitis B. Currently, an international group of hepatologists has been assembled to evaluate research since the publication of the original consensus, and to collaboratively develop the updated statements. The 2.0 Consensus was aimed to update the original consensus with the latest available studies, and provide a comprehensive overview of the current relevant scientific literatures regarding functional cure of hepatitis B, with a particular focus on issues that are not yet fully clarified. These cover the definition of functional cure of hepatitis B, its mechanisms and barriers, the effective strategies and treatment roadmap to achieve this endpoint, in particular new surrogate biomarkers used to measure efficacy or to predict response, and the appropriate approach to pursuing a functional cure in special populations, the development of emerging antivirals and immunomodulators with potential for curing hepatitis B. The statements are primarily intended to offer international guidance for clinicians in their practice to enhance the functional cure rate of chronic hepatitis B.
8.Update on the treatment navigation for functional cure of chronic hepatitis B: Expert consensus 2.0
Di WU ; Jia-Horng KAO ; Teerha PIRATVISUTH ; Xiaojing WANG ; Patrick T.F. KENNEDY ; Motoyuki OTSUKA ; Sang Hoon AHN ; Yasuhito TANAKA ; Guiqiang WANG ; Zhenghong YUAN ; Wenhui LI ; Young-Suk LIM ; Junqi NIU ; Fengmin LU ; Wenhong ZHANG ; Zhiliang GAO ; Apichat KAEWDECH ; Meifang HAN ; Weiming YAN ; Hong REN ; Peng HU ; Sainan SHU ; Paul Yien KWO ; Fu-sheng WANG ; Man-Fung YUEN ; Qin NING
Clinical and Molecular Hepatology 2025;31(Suppl):S134-S164
As new evidence emerges, treatment strategies toward the functional cure of chronic hepatitis B are evolving. In 2019, a panel of national hepatologists published a Consensus Statement on the functional cure of chronic hepatitis B. Currently, an international group of hepatologists has been assembled to evaluate research since the publication of the original consensus, and to collaboratively develop the updated statements. The 2.0 Consensus was aimed to update the original consensus with the latest available studies, and provide a comprehensive overview of the current relevant scientific literatures regarding functional cure of hepatitis B, with a particular focus on issues that are not yet fully clarified. These cover the definition of functional cure of hepatitis B, its mechanisms and barriers, the effective strategies and treatment roadmap to achieve this endpoint, in particular new surrogate biomarkers used to measure efficacy or to predict response, and the appropriate approach to pursuing a functional cure in special populations, the development of emerging antivirals and immunomodulators with potential for curing hepatitis B. The statements are primarily intended to offer international guidance for clinicians in their practice to enhance the functional cure rate of chronic hepatitis B.
9.Effectiveness of Xuanshen Yishen Decoction on Intensive Blood Pressure Control: Emulation of a Randomized Target Trial Using Real-World Data.
Xiao-Jie WANG ; Yuan-Long HU ; Jia-Ming HUAN ; Shi-Bing LIANG ; Lai-Yun XIN ; Feng JIANG ; Zhen HUA ; Zhen-Yuan WANG ; Ling-Hui KONG ; Qi-Biao WU ; Yun-Lun LI
Chinese journal of integrative medicine 2025;31(8):677-684
OBJECTIVE:
To investigate the effectiveness of Xuanshen Yishen Decoction (XYD) in the treatment of hypertension.
METHODS:
Hospital electronic medical records from 2019-2023 were utilized to emulate a randomized pragmatic clinical trial. Hypertensive participants were eligible if they were aged ⩾40 years with baseline systolic blood pressure (BP) ⩾140 mm Hg. Patients treated with XYD plus antihypertensive regimen were assigned to the treatment group, whereas those who followed only antihypertensive regimen were assigned to the control group. The primary outcome assessed was the attainment rate of intensive BP control at discharge, with the secondary outcome focusing on the 6-month all-cause readmission rate.
RESULTS:
The study included 3,302 patients, comprising 2,943 individuals in the control group and 359 in the treatment group. Compared with the control group, a higher proportion in the treatment group achieved the target BP for intensive BP control [8.09% vs. 17.5%; odds ratio (OR)=2.29, 95% confidence interval (CI)=1.68 to 3.13; P<0.001], particularly in individuals with high homocysteine levels (OR=3.13; 95% CI=1.72 to 5.71; P<0.001; P for interaction=0.041). Furthermore, the 6-month all-cause readmission rate in the treatment group was lower than in the control group (hazard ratio=0.58; 95% CI=0.36 to 0.91; P=0.019), and the robustness of the results was confirmed by sensitivity analyse.
CONCLUSIONS
XYD could be a complementary therapy for intensive BP control. Our study offers real-world evidence and guides the choice of complementary and alternative therapies. (Registration No. ChiCTR2400086589).
Adult
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Aged
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Female
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Humans
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Male
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Middle Aged
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Antihypertensive Agents/pharmacology*
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Blood Pressure/drug effects*
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Drugs, Chinese Herbal/pharmacology*
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Hypertension/physiopathology*
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Patient Readmission
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Treatment Outcome
10.Parkin inhibits iron overload-induced cardiomyocyte ferroptosis by ubiquitinating ACSL4 and modulating PUFA-phospholipids metabolism.
Dandan XIAO ; Wenguang CHANG ; Xiang AO ; Lin YE ; Weiwei WU ; Lin SONG ; Xiaosu YUAN ; Luxin FENG ; Peiyan WANG ; Yu WANG ; Yi JIA ; Xiaopeng TANG ; Jianxun WANG
Acta Pharmaceutica Sinica B 2025;15(3):1589-1607
Iron overload is strongly associated with heart disease. Ferroptosis is a new form of regulated cell death indicated in cardiac ischemia-reperfusion (I/R) injury. However, the specific molecular mechanism of myocardial injury caused by iron overload in the heart is still unclear, and the involvement of ferroptosis in iron overload-induced myocardial injury is not fully understood. In this study, we observed that ferroptosis participated in developing of iron overload and I/R-induced cardiomyopathy. Mechanistically, we discovered that Parkin inhibited iron overload-induced ferroptosis in cardiomyocytes by promoting the ubiquitination of long-chain acyl-CoA synthetase 4 (ACSL4), a crucial protein involved in ferroptosis-related lipid metabolism pathways. Additionally, we identified p53 as a transcription factor that transcriptionally suppressed Parkin expression in iron-overloaded cardiomyocytes, thereby regulating iron overload-induced ferroptosis. In animal studies, cardiac-specific Parkin knockout mice (Myh6-CreER T2 /Parkin fl/fl ) fed a high-iron diet presented more severe myocardial damage, and the high iron levels exacerbated myocardial I/R injury. However, the ferroptosis inhibitor Fer-1 significantly suppressed iron overload-induced ferroptosis and myocardial I/R injury. Moreover, Parkin effectively protected against impaired mitochondrial function and prevented iron overload-induced mitochondrial lipid peroxidation. These findings unveil a novel regulatory pathway involving p53-Parkin-ACSL4 in heart disease by inhibiting of ferroptosis.

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