1.The feasibility of using high-definition thoracoscopy to identify sympathetic ganglia during thoracic sympathicotomy for primary palmar hyperhidrosis
Gang XU ; Chaoyue HU ; Cong CHEN ; Yuancai LIN ; Daolong ZHU ; Han LIU ; Dong WANG
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(04):578-583
Objective To explore the feasibility of using high-definition thoracoscopy to identify sympathetic ganglia during thoracic sympathicotomy for primary palmar hyperhidrosis. Methods The clinical data of patients with primary palmar hyperhidrosis who underwent high-definition thoracoscopic sympathicotomy in Taikang Xianlin Drum Tower Hospital from June to July 2023 were retrospectively analyzed. Intraoperative visualization rates and anatomical variations of sympathetic ganglia were recorded, and the consistency between white-light thoracoscopy and near-infrared fluorescence imaging was compared. Additionally, surgical videos from previous fluorescence-guided procedures were reviewed. Results Finally 100 patients were collected, including 54 females and 46 males, with an average age of (21.92±6.56) years. All patients underwent endoscopic thoracic sympathicotomy at R3 level. The overall intraoperative ganglion visualization rate was 92.5% (740/800), with G2-G5 rates of 95.5% (191/200), 94.0% (188/200), 94.0% (188/200), and 86.5% (173/200), respectively. Ganglion variations occurred in 32.0% (237/740), predominantly at G3 (29.8%) and G4 (42.6%). In 5 indocyanine green-enhanced patients, the concordance rate between white-light and near-infrared fluorescence imaging was 100.0% (38/38). Video analysis of 14 near-infrared fluorescence-guided surgeries demonstrated a 99.1% (107/108) consistency rate. Postoperative palmar hyperhidrosis improvement reached 100.0% (100/100) with no Horner’s syndrome. Conclusion With the wide clinical application of high-definition thoracoscopy, accurate thoracic sympathicotomy has the feasibility of clinical application.
2.Effect and Mechanism of Liangyi Paste on Hepatic Lipid Deposition in Naturally Aged Mice with High-fat Diet via Cuproptosis/Oxidative Stress Pathway
Meiling ZHANG ; Yuanguang DONG ; Xiaofei SUN ; Jiaxin WANG ; Yu LIU ; Jingxuan ZHU ; Qun WANG ; Nan SONG ; Guoyuan SUI ; Lianqun JIA
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):91-99
ObjectiveTaking the cuproptosis/oxidative stress pathway as the entry point, this study investigated the effect and mechanism of Liangyi Paste on hepatic lipid deposition in naturally aged mice fed with a high-fat diet. MethodsAfter adaptive feeding, 80 ten-week-old male C57BL/6 mice were used. Thirty of them were randomly divided into three groups (10 mice per group): The 12-month-old control group (12MCON), the 15-month-old control group (15MCON), and the 15-month-old group with a high-fat diet (15MHFD). The 12MCON and 15MCON groups were continuously fed a standard diet, while the 15MHFD group started receiving a high-fat diet at 12 months of age. Tissue samples were collected at the corresponding time points for each group. The remaining 50 mice were randomly divided into five groups (10 mice per group): the 20-month-old control group (20MCON), the model group, and the low-, medium-, and high-dose Liangyi Paste groups (2.91 , 5.82 , 11.64 g·kg-1·d-1, respectively). The 20MCON group was continuously fed a standard diet, while the other groups started receiving a high-fat diet at 15 months of age. At 18 months of age, the Liangyi Paste groups were administered the corresponding doses of Liangyi Paste by gavage, while the 20MCON and model groups were given an equal volume of saline by gavage. After 8 weeks of continuous gavage (when the mice reached 20 months of age), tissue samples were collected. Hepatic TG levels were measured using assay kits; liver histology and lipid deposition were observed via hematoxylin-eosin (HE) and oil red O staining; reactive oxygen species (ROS) were detected by enzyme-linked immunosorbent assay (ELISA); Cu2+, superoxide dismutase (SOD), and malondialdehyde (MDA) levels were measured by colorimetry; mRNA and protein expression of genes related to cuproptosis and oxidative stress pathways were analyzed by Real-time polymerase chain reaction(Real-time PCR) and Wes automated protein expression system. ResultsCompared with 12MCON, the 15MCON group showed significantly increased hepatic TG, Cu2+, ROS, and MDA levels (P<0.01), decreased SOD (P<0.01), hepatocyte swelling, and disordered arrangement. The mRNA and protein levels of ferredoxin 1 (FDX1), dihydrolipoamide S-acetyltransferase (DLAT), heat shock protein 70 (HSP70), dihydrolipoamide dehydrogenase (DLD), pyruvate dehydrogenase E1 subunit-β (PDHB), nuclear factor erythroid 2-related factor 2 (Nrf2), and peroxisome proliferator-activated receptor γ (PPARγ) were significantly elevated (P<0.05, P<0.01). Compared with 15MCON group, the 15MHFD and 20MCON groups exhibited further increases in TG, Cu2+, ROS, and MDA (P<0.01), reduced SOD (P<0.01), and aggravated hepatocyte swelling and disorder. There were increased lipid droplets with mild vacuolization in the 15MHFD group, and no significant lipid deposition was observed in the 20MCON group. FDX1, DLAT, HSP70, DLD, PDHB, Nrf2, and PPARγ mRNA and protein levels were significantly increased (P<0.05, P<0.01). Compared with 20MCON group, the model group demonstrated markedly elevated TG, Cu2+, ROS, and MDA (P<0.01), reduced SOD (P<0.01), severe hepatic steatosis, and upregulated expression of FDX1, DLAT, HSP70, DLD, PDHB, Nrf2, and PPARγ mRNA and proteins (P<0.05, P<0.01). All abnormalities were significantly reversed after Liangyi Paste treatment. ConclusionLiangyi paste can ameliorate hepatic lipid deposition in naturally aged mice with a high-fat diet by modulating the cuproptosis/oxidative stress pathway.
3.Molecular Characterization Network of Dampness-heat Syndrome in Patients with Chronic Hepatitis B Complicated by Glucose Metabolism Disorder Based on Shadowless Scleral Imaging and Metabolomics Technology
Caiying HE ; Hang ZHOU ; Yanqi CHI ; Baixue LI ; Liang HUANG ; Zhu CHEN ; Dafeng LIU ; Dong WANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(14):271-285
ObjectiveThis paper aims to conduct the feature analysis and correlation analysis on the ocular collateral features and differential metabolites in patients with chronic hepatitis B (CHB) complicated by glucose metabolism disorder (GMD),particularly those with the damp-heat syndrome type,by integrating shadowless scleral imaging and metabolomics technologies. MethodsA total of 313 patients were recruited from the Hepatology and Endocrinology Outpatient Departments of Public Health Clinical Center of Chengdu according to the inclusion/exclusion criteria,and they were divided into a CHB group and a CHB complicated by GMD groups (damp-heat syndrome group and non-damp-heat syndrome group). All patients underwent high-definition ocular image acquisition and feature extraction using an intelligent analysis system for shadowless scleral imaging to analyze the differences in the counting of morphological feature scores of ocular collaterals among groups. By using a digital sampling method,24 patients from each group were randomly selected,along with 20 healthy volunteers,for untargeted metabolomic analysis of peripheral serum. Differential metabolites were identified,statistically analyzed,and subjected to potential biomarker analysis and pathway enrichment. Spearman method was performed to conduct the correlation analysis on the differential ocular collateral features and differential metabolites,followed by correlation network construction. ResultsCompared with those in the CHB group,patients with CHB complicated by GMD showed significant changes in ocular collateral feature scores such as "hillock","blood vessels",and "pale dusky coloration" (P<0.05). In comparison with those in the healthy group,metabolites including N-acetylglucosamine,acetylhomoserine,and myo-inositol (AUC>0.7) were identified as potential biomarkers for the disease. Compared with those in the CHB complicated by GMD group with non-damp-heat syndrome,patients with damp-heat syndrome exhibited significant changes in feature scores of "plaques","yellow coloration","spleen",and "gallbladder" (P<0.05). In comparison with those in the healthy group,metabolites such as O2′-4a-cyclic tetrahydrobiopterin,theobromine,xanthurenic acid,and L-glutamic acid 5-phosphate (AUC>0.7) were identified as potential biomarkers for the damp-heat syndrome type. The Spearman correlation analysis reveals weak to moderate linear correlations between the differential scleral collateral features and metabolites. By constructing a "disease-syndrome" network of ocular diagnosis and metabolites,"xanthurenic acid-gallbladder" and "theobromine-plaque/yellow coloration" were identified as specific molecular-phenotypic correlated biomarker clusters for CHB complicated by GMD with dampness-heat syndrome. ConclusionPatients with CHB complicated by GMD demonstrate differential ocular diagnostic features and serum metabolites corresponding to disease states and dampness-heat syndrome. These objective biomarkers can guide both clinical syndrome differentiation and medication. The macro-micro integration based on ocular feature clusters and potential metabolic biomarkers offers an innovative approach to a combined traditional Chinese and Western medicine diagnosis and treatment model for this disease.
4.Prediction factors of dual-task gait function improvement through short-term aerobic training in patients with Parkinson's disease
Yang JIAO ; Xinru HU ; Weijia HOU ; Yue WANG ; Jin WANG ; Yang YU ; Zhizhong ZHU ; Ying DONG
Chinese Journal of Rehabilitation Theory and Practice 2026;32(6):699-707
ObjectiveTo construct a prediction model for high responsiveness to short-term aerobic training in patients with Parkinson's disease (PD) based on dual-task gait assessment, and to provide evidence for identifying individuals who are most likely to benefit from such interventions. MethodsA total of 42 patients with PD who visited the outpatient clinic of Tianjin Huanhu Hospital between August 29, 2023 and December 19, 2024 were enrolled. All participants completed a 4-week home-based aerobic cycling training program and underwent dual-task gait assessments pre- and post-training. Patients were classified into high-response group (n = 12) and low-response group (n = 30) according to whether the improvement in gait speed reached the minimal clinically important difference of 0.1 m/s. The clinical validity of this grouping was verified by comparing differences in cardiopulmonary exercise testing parameters and dual-task gait indicators between the two groups pre- and post-training. Based on baseline characteristics, Firth's penalized maximum likelihood logistic regression was applied to construct a predictive model for high responsiveness, and the discriminative performance of the model was assessed preliminarily. ResultsThe high-response group showed significantly greater improvement in gait speed, step length, cadence and the anaerobic threshold to maximal oxygen uptake ratio after training compared with the low-response group (P < 0.05), confirming the clinical validity of the grouping. The baseline anaerobic threshold to maximal oxygen uptake ratio (OR = 3.348), body mass index (OR = 2.229) and age (OR = 0.428) demonstrated certain discriminative ability in the present sample. The area under the receiver operating characteristic curve was 0.831, with an overall prediction accuracy of 81.0%, specificity of 83.3% and sensitivity of 75.0%. Robustness of the model was confirmed via internal validation using the Bootstrap method, which suggested that the results were informative, but further validation was still required. ConclusionThe anaerobic threshold/maximal oxygen uptake ratio, body mass index and age may predict the response to short-term aerobic training in patients with PD.
5.Annual review of basic research on lung transplantation worldwide in 2025
Jier MA ; Kemeng SUN ; Xiaohan JIN ; Jiaqi LI ; Xinyue ZHANG ; Chama LOUJAINE ; Junmin ZHU ; Hengtao LIN ; Xiangyun ZHENG ; Junjie WANG ; Zengwei YU ; Yaling LIU ; Haoji YAN ; Dong TIAN
Organ Transplantation 2026;17(4):582-593
Lung transplantation is a definitive treatment for end-stage lung disease and can significantly improve patient prognosis. However, postoperative complications such as infection, rejection, ischemia-reperfusion injury and chronic lung allograft dysfunction intertwine to form a complex pathological network, posing persistent challenges to long-term patient survival. In 2025, research teams worldwide have made systematic progress in the field of basic lung transplantation research. By integrating cutting-edge technologies including single-cell multi-omics, spatial transcriptomics and novel animal models, significant breakthroughs have been achieved in the evolutionary dynamics of drug-resistant infections, molecular mechanisms of immune regulation, programmed cell death, optimization of donor lung protection strategies and early warning of chronic lung allograft dysfunction. This article systematically reviews the representative advances in basic lung transplantation research worldwide in 2025, and deeply analyzes the implications of mechanistic breakthroughs for optimizing diagnosis and treatment strategies, aiming to anchor the direction for innovative breakthroughs and clinical translation in basic lung transplantation research.
6.Application value of simplified diagnosis and treatment strategies for chronic hepatitis C in human immunodeficiency virus/hepatitis C virus co-infection
Ying CAI ; Zhibin YANG ; Yang LUO ; Cong WANG ; Yongfen ZHU ; Ze LI ; Rusong YANG ; Qiang WU ; Wenbin DONG ; Shifu LI
Journal of Clinical Hepatology 2026;42(6):1287-1293
ObjectiveTo investigate the efficacy and safety of simplified diagnosis and treatment strategies and regimens in the treatment of patients with human immunodeficiency virus (HIV)/hepatitis C virus (HCV) co-infection. MethodsThis multicenter prospective real-world study was conducted among 198 patients with HIV/HCV co-infection who received hepatitis C treatment in 10 designated primary hospitals for hepatitis C in Yuxi, China from July 2023 to June 2024, and according to whether genotype detection was performed, they were divided into genotype detection group with 122 patients and non-genotype detection group with 76 patients. The patients were observed in terms of sustained virologic response at 12 weeks (SVR12), safety, and liver biochemical parameters. Propensity score matching was used to match the two cohorts, using caliper matching (caliper value = 0.02) at a ratio of 1∶1. The independent-samples t test or the Wilcoxon signed-rank test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between groups. ResultsAmong the 122 patients in the genotype detection group, 63.11% (77/122) had genotype 3, while the non-genotype detection group had 76 patients; both groups achieved an SVR12 rate of 100%. From baseline to 12 weeks after treatment, both groups had a significant increase in the serum level of albumin, significant reductions in the serum levels of total bilirubin, alanine aminotransferase, aspartate aminotransferase, and alpha-fetoprotein, and a significant reduction in FibroScan value (all P<0.05). A total of 54 patients (27.27%) experienced at least one adverse reaction, and anemia was the most common adverse reaction (38 patients, 19.19%), with an incidence rate of 50.00% (33/66) in patients with liver cirrhosis. HIV viral load remained <50 IU/mL before and after treatment, and there was no significant change in CD4+ T lymphocyte count after treatment (Z=-0.969, P=0.202). Compared with the genotype detection group, the non-genotype detection group had a significantly shorter time from positive HCV RNA testing to treatment initiation (4±2 days vs 19±4 days, t=5.321, P<0.05) and significantly lower testing costs (618±97 yuan vs 789±129 yuan, t=3.661, P<0.05). ConclusionFor patients with HIV/HCV co-infection, the simplified diagnosis and treatment strategies can achieve a relatively high SVR12 rate, improve biochemical indicators, and effectively reduce time cost and economic burden, with a favorable safety profile.
7.Research Progress on the Risk of Excipients-Related Adverse Reactions in Pharmaceutical Preparations for IBD Treatment
Yanru ZHANG ; Qiuyue TU ; Ping WANG ; Zelin FENG ; Huizhen LI ; Yushan ZHU ; Haojia LIN ; Xinyue WEI ; Qinghua YI ; Hetong ZHANG ; Yueting LI ; Xiaoqin LI ; Yu WANG ; Dong XIE ; Xiaocang CAO
Medical Journal of Peking Union Medical College Hospital 2026;17(4):1135-1142
Patients with inflammatory bowel disease (IBD) require long-term pharmacotherapy. Due to the wide variety of clinically available drugs, medication safety has become increasingly concerning. As an indispensable component of pharmaceutical formulations, drug excipients may induce various adverse reactions, including rash, allergic responses, and gastrointestinal discomfort, and may even lead to severe organic injury. However, they are often overlooked in clinical practice. Therefore, identifying and managing excipient-related adverse reactions is crucial for ensuring medication safety. To address this issue, this article systematically reviews common excipients in IBD therapeutics, the underlying mechanisms of excipient-induced adverse reactions, and corresponding management strategies, aiming to enhance clinicians' awareness of excipient-related issues, improve their ability to recognize and manage such reactions, and ultimately ensure patient safety.
8.Analysis of Pharmacodynamic Material Basis, Mechanisms, and Efficacy-related Quality Markers of Puerariae Lobatae Radix and Puerariae Thomsonii Radix with Different Therapeutic Effect
Xiaowei MENG ; Zhenzhen YANG ; Wenting WU ; Ronghua LIU ; Yongmei GUAN ; Hui OUYANG ; Liping HUANG ; Yaqi WANG ; Qiong LI ; Huanhuan DONG ; Jianping GONG ; Weifeng ZHU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(18):269-281
Puerariae Lobatae Radix and Puerariae Thomsonii Radix are the dried roots of Pueraria lobata and Pueraria thomsonii of the Leguminosae family, respectively. Since their separate inclusion in the 2005 edition of Pharmacopoeia of the People's Republic of China, the two herbs have been individually recorded. Although they share the same functions and indications, the required content of puerarin differs by a factor of up to eightfold between them. The current quality standard relies solely on a single indicator, puerarin, which fails to reflect the correlation between chemical constituents and core therapeutic effects. This has resulted in prominent issues of mixed use in clinical practice and production, thereby constraining the high-quality development of the industry. Modern research has demonstrated that Puerariae Lobatae Radix contains a comprehensive range and higher content of isoflavonoid constituents, while Puerariae Thomsonii Radix is rich in starch and polysaccharides. Puerariae Lobatae Radix exhibits stronger effects in antipyresis, cardiovascular and cerebrovascular protection, and central analgesia, while Puerariae Thomsonii Radix demonstrates greater advantages in anti-inflammation, hypoglycemia, and peripheral analgesia. Based on this, the chemical material bases of Puerariae Lobatae Radix and Puerariae Thomsonii Radix at both the macromolecule and micromolecule levels were systematically reviewed and compared. The pharmacodynamic material bases and mechanisms of action underlying their three core therapeutic effects, namely "relieving exterior syndrome and clearing heat", "promoting fluid production to quench thirst", and "dredging channels and activating collaterals", were summarized. The most highly correlated common metabolic pathway shared by both herbs for these three therapeutic effects is the arachidonic acid metabolic pathway, and their common core target is prostaglandin-endoperoxide synthase 2 (PTGS2). This review provided clinical application recommendations based on the therapeutic differences between the two herbs, elucidated the scientific connotation of their "same origin but different effects", and, grounded in the quality marker (Q-Marker), proposed the concept of efficacy-related Q-Marker based on "substance-efficacy-syndrome" association, as well as a novel strategy for efficacy-oriented quality evaluation. Preliminary screening of quality markers associated with different therapeutic effects was also conducted. This study aims to provide critical scientific evidence for the precise clinical application of Puerariae Lobatae Radix and Puerariae Thomsonii Radix, the improvement of quality standards, and the high-quality development of the industry.
9.Mechanism of Shengxian Yixin Granule (升陷益心颗粒) in the Treatment of Heart Failure with Preserved Ejection Fraction Based on Macrophage-Mediated Inflammatory Response
Zhengwei DONG ; Rui YU ; Qiaozhi LI ; Huan ZHAO ; Jingjing WEI ; Genhao FAN ; Xinlu WANG ; He WANG ; Yongxia WANG ; Mingjun ZHU
Journal of Traditional Chinese Medicine 2026;67(19):2086-2094
ObjectiveTo investigate the effect and mechanism of Shengxian Yixin Granule (升陷益心颗粒, SYG) in treating heart failure with preserved ejection fraction (HFpEF). MethodsExperiment 1: Forty male C57BL/6 mice were randomly divided into control group, model group, low-dose [25 mg/(kg·d)], medium-dose [50 mg/(kg·d)], and high-dose [(75 mg/(kg·d)] SYG groups, with 8 mice per group. Except for the control group, HFpEF was induced by a high-fat diet combined with Nω-nitro-L-arginine methyl ester in drinking water for 16 weeks. After 10 weeks of modeling, treatment groups received corresponding doses of SYG by gavage, while the control group and model group received equal volume of normal saline, for 6 weeks. After 6 weeks of administration, the body weight, blood pressure including systolic blood pressure (SBP) and diastolic blood pressure (DBP), and heart weight-to-tibia length ratio (HW/TL) were recorded. Echocardiography was used to evaluate left ventricular ejection fraction (LVEF) and the ratio of early to late diastolic transmitral flow velocity (E/A). Plasma N-terminal pro-brain natriuretic peptide (NT-proBNP) and C-reactive protein (CRP) levels were measured by ELISA. The expression level of brain natriuretic peptide (BNP) in heart tissue was detected by qRT-PCR. Blood lipid levels, including low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), and total cholesterol (TC), were determined by a biochemical analyzer. Splenic proportions of M1 macrophages, M2 macrophages, T helper 17 (Th17) cells, and regulatory T (Treg) cells were analyzed by flow cytometry. Experiment 2: RAW 264.7 cells were stimulated with lipopolysaccharide (LPS) to establish an M1 macrophage polarization model, and then treated with SYG-containing serum for 24 h. The cells were divided into four groups, including blank serum group, high-dose SYG-containing serum group, LPS group, and LPS plus high-dose SYG-containing serum group. Combined with asignal transducer and activator of transcription 3 (Stat3) inhibitor for 24 h, the cells were divided into a lipopolysaccharide group, a high-dose SYG-containing serum group, an inhibitor group, and high-dose SYG-containing serum plus inhibitor group. The expression levels of inducible nitric oxide synthase (iNOS) and interleukin-1β (IL-1β) in each group were detected by qRT-PCR. The protein levels of iNOS, IL-1β, Stat3, and phosphorylated Stat3 (p-Stat3) were detected by Western Blotting. ResultsExperiment 1: Compared to the control group, the model group showed significantly decreased E/A ratio, and increased cardiac BNP expression, plasma NT-proBNP,HW/TL ratio, body weight, TC, LDL-C, SBP, and DBP, as well as shortened exhaustion distance and exhaustion time (P<0.05 or P<0.01). Compared to the model group, the E/A ratio increased in the low-, medium-, and high-dose SYG groups; cardiac BNP expression decreased in the low- and high-dose groups, and plasma NT-proBNP levels decreased in the high-dose group; the HW/TL ratio and body weight decreased, while exhaustion distance and exhaustion time increased in the medium- and high-dose groups; TG levels decreased in the low- and medium-dose groups, and LDL-C levels decreased in the medium- and high-dose groups; SBP and DBP decreased in the low-, medium-, and high-dose groups (P<0.05 or P<0.01). Compared to the low-dose SYG group, body weight decreased, and both exhaustion distance and exhaustion time increased in the medium- and high-dose groups (P<0.05 or P<0.01). Compared to the medium-dose SYG group, the exhaustion time increased in the high-dose SYG group (P<0.01). Experiment 2: In the LPS‑induced M1 macrophage polarization model, compared to the blank serum group, the LPS group showed significantly increased mRNA and protein expression of iNOS and IL‑1β, as well as the p‑Stat3/Stat3 ratio (P<0.01). Compared to the LPS group, the high‑dose SYG-containing serum plus LPS group showed significantly decreased mRNA and protein expression of iNOS and IL‑1β, as well as the p‑Stat3/Stat3 ratio (P<0.05 or P<0.01). Compared to the LPS group, the inhibitor group also showed significantly reduced these parameters (P<0.05 or P<0.01). ConclusionSYG can improve cardiac function, ventricular remodeling, exercise capacity, and lipid metabolism in HFpEF mice, while inhibiting inflammatory responses. Its mechanism may be related to the regulation of the Stat3 signaling pathway and inhibition of M1 macrophage polarization.
10.Mechanism of Shengxian Yixin Granule (升陷益心颗粒) in the Treatment of Heart Failure with Preserved Ejection Fraction Based on Macrophage-Mediated Inflammatory Response
Zhengwei DONG ; Rui YU ; Qiaozhi LI ; Huan ZHAO ; Jingjing WEI ; Genhao FAN ; Xinlu WANG ; He WANG ; Yongxia WANG ; Mingjun ZHU
Journal of Traditional Chinese Medicine 2026;67(19):2086-2094
ObjectiveTo investigate the effect and mechanism of Shengxian Yixin Granule (升陷益心颗粒, SYG) in treating heart failure with preserved ejection fraction (HFpEF). MethodsExperiment 1: Forty male C57BL/6 mice were randomly divided into control group, model group, low-dose [25 mg/(kg·d)], medium-dose [50 mg/(kg·d)], and high-dose [(75 mg/(kg·d)] SYG groups, with 8 mice per group. Except for the control group, HFpEF was induced by a high-fat diet combined with Nω-nitro-L-arginine methyl ester in drinking water for 16 weeks. After 10 weeks of modeling, treatment groups received corresponding doses of SYG by gavage, while the control group and model group received equal volume of normal saline, for 6 weeks. After 6 weeks of administration, the body weight, blood pressure including systolic blood pressure (SBP) and diastolic blood pressure (DBP), and heart weight-to-tibia length ratio (HW/TL) were recorded. Echocardiography was used to evaluate left ventricular ejection fraction (LVEF) and the ratio of early to late diastolic transmitral flow velocity (E/A). Plasma N-terminal pro-brain natriuretic peptide (NT-proBNP) and C-reactive protein (CRP) levels were measured by ELISA. The expression level of brain natriuretic peptide (BNP) in heart tissue was detected by qRT-PCR. Blood lipid levels, including low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), and total cholesterol (TC), were determined by a biochemical analyzer. Splenic proportions of M1 macrophages, M2 macrophages, T helper 17 (Th17) cells, and regulatory T (Treg) cells were analyzed by flow cytometry. Experiment 2: RAW 264.7 cells were stimulated with lipopolysaccharide (LPS) to establish an M1 macrophage polarization model, and then treated with SYG-containing serum for 24 h. The cells were divided into four groups, including blank serum group, high-dose SYG-containing serum group, LPS group, and LPS plus high-dose SYG-containing serum group. Combined with asignal transducer and activator of transcription 3 (Stat3) inhibitor for 24 h, the cells were divided into a lipopolysaccharide group, a high-dose SYG-containing serum group, an inhibitor group, and high-dose SYG-containing serum plus inhibitor group. The expression levels of inducible nitric oxide synthase (iNOS) and interleukin-1β (IL-1β) in each group were detected by qRT-PCR. The protein levels of iNOS, IL-1β, Stat3, and phosphorylated Stat3 (p-Stat3) were detected by Western Blotting. ResultsExperiment 1: Compared to the control group, the model group showed significantly decreased E/A ratio, and increased cardiac BNP expression, plasma NT-proBNP,HW/TL ratio, body weight, TC, LDL-C, SBP, and DBP, as well as shortened exhaustion distance and exhaustion time (P<0.05 or P<0.01). Compared to the model group, the E/A ratio increased in the low-, medium-, and high-dose SYG groups; cardiac BNP expression decreased in the low- and high-dose groups, and plasma NT-proBNP levels decreased in the high-dose group; the HW/TL ratio and body weight decreased, while exhaustion distance and exhaustion time increased in the medium- and high-dose groups; TG levels decreased in the low- and medium-dose groups, and LDL-C levels decreased in the medium- and high-dose groups; SBP and DBP decreased in the low-, medium-, and high-dose groups (P<0.05 or P<0.01). Compared to the low-dose SYG group, body weight decreased, and both exhaustion distance and exhaustion time increased in the medium- and high-dose groups (P<0.05 or P<0.01). Compared to the medium-dose SYG group, the exhaustion time increased in the high-dose SYG group (P<0.01). Experiment 2: In the LPS‑induced M1 macrophage polarization model, compared to the blank serum group, the LPS group showed significantly increased mRNA and protein expression of iNOS and IL‑1β, as well as the p‑Stat3/Stat3 ratio (P<0.01). Compared to the LPS group, the high‑dose SYG-containing serum plus LPS group showed significantly decreased mRNA and protein expression of iNOS and IL‑1β, as well as the p‑Stat3/Stat3 ratio (P<0.05 or P<0.01). Compared to the LPS group, the inhibitor group also showed significantly reduced these parameters (P<0.05 or P<0.01). ConclusionSYG can improve cardiac function, ventricular remodeling, exercise capacity, and lipid metabolism in HFpEF mice, while inhibiting inflammatory responses. Its mechanism may be related to the regulation of the Stat3 signaling pathway and inhibition of M1 macrophage polarization.

Result Analysis
Print
Save
E-mail