1.Zuogui Wan Improve Ovarian Inflammatory Microenvironment and Stemness of Ovarian Germline Stem Cells in Ovarian Aging via cGAS/STING Signaling Pathway
Yunling ZHENG ; Xinyi PAN ; Zuang LI ; Yixuan WANG ; Junyi AN ; Yuxin ZOU ; Mengting XIAO ; Zheng CHEN ; Ling ZHU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(7):1-10
ObjectiveTo investigate the mechanism of Zuogui Wan (ZGW) in improving ovarian inflammatory microenvironment and stemness of ovarian germline stem cells (OSCs) for treating ovarian aging via the cyclic guanosine monophosphate/adenosine monophosphate synthase (cGAS)/stimulator of interferon genes (STING) signaling pathway. MethodsForty C57BL/6 female mice were randomly divided into a blank group, a model group, a low-dose ZGW group (2.7 g·kg-1), a high-dose ZGW group (5.4 g·kg-1), and an estradiol valerate group (0.15 mg·kg-1), with 8 mice in each group. Except the blank group, all other groups received a single intraperitoneal injection of cyclophosphamide at 120 mg·kg-1 to establish an ovarian aging mouse model. After successful modeling, each group was continuously administered for 4 weeks, once daily. The physiological status of the mice was observed, and the ovarian index was calculated. The estrus cycle of the mice was monitored. Hematoxylin-eosin (HE) staining was used to observe pathological changes in ovarian tissue. Enzyme-linked immunosorbent assay (ELISA) was used to detect serum sex hormone levels. Serum inflammatory factors interleukin-1β (IL-1β), tumor necrosis factor-α (TNF-α), and mouse interleukin-6 (IL-6) levels were detected using kits. Western blot was used to detect the protein expression of ovarian cGAS, STING, p-STING, TANK-binding kinase 1 (TBK1), p-TBK1, interferon-induced transmembrane protein 3 (Fragilis), and Vasa homolog protein (MVH). Quantitative real-time polymerase chain reaction (Real-time PCR) was used to detect the mRNA expression of inflammatory factors in ovarian tissue. Immunofluorescence double labeling was performed to locate OSCs in ovarian tissues, and fluorescence intensities of OSCs markers MVH and octamer binding transcription factor 4 (Oct4) were calculated. ResultsCompared with the blank group, the model group showed reduced body weight, ovarian wet weight, and ovarian index (P<0.01) and a disordered estrus cycle (P<0.01). In addition, the levels of serum follicle-stimulating hormone (FSH), TNF-α, IL-6, and IL-1β were increased (P<0.01), while anti-Müllerian hormone (AMH) and estradiol (E2) levels were decreased (P<0.01). The protein expression of cGAS, p-STING/STING, and p-TBK1/TBK1 in ovarian tissue was increased (P<0.05, P<0.01), while that of OSCs stemness factors MVH and Fragilis was reduced (P<0.01). Immunofluorescence indicated a reduction in MVH and Oct4 expression in OSCs (P<0.01). The mRNA expression of inflammatory factors TNF-α, IL-6, and IL-1β in ovarian tissue was increased (P<0.05, P<0.01). Compared with the model group, the treatment groups exhibited improved body weight, ovarian wet weight, and ovarian index (P<0.05) and a reduced rate of estrus cycle disorder (P<0.05, P<0.01). The levels of serum FSH, TNF-α, IL-6, and IL-1β were decreased (P<0.05, P<0.01), while AMH and E2 levels were increased (P<0.01). The protein expression levels of cGAS, p-STING/STING, and p-TBK1/TBK1 in ovarian tissue were decreased (P<0.05), while the protein expression of MVH and Fragilis was increased (P<0.05), and the fluorescence intensities of MVH and Oct4 were increased (P<0.05, P<0.01). The mRNA expression of inflammatory factors in ovarian tissue was decreased (P<0.05). ConclusionZGW alleviate ovarian inflammatory response, regulate ovarian microenvironment homeostasis, and maintain stemness of OSCs in ovarian aging mice probably by modulating the cGAS-STING signaling pathway, thereby improving ovarian function and delaying ovarian aging.
2.Role of endoplasmic reticulum stress-mediated DEAD-box helicase 3 X-linked in a mouse model of concanavalin A-induced immune-mediated liver injury
Zhenzhen PAN ; Ling XU ; Xianru ZHU ; Zihao FAN ; Yaling CAO ; Yinkang MO ; Sai YAN ; Feng REN
Journal of Clinical Hepatology 2026;42(1):134-142
ObjectiveTo investigate the role of DEAD-box helicase 3 X-linked (DDX3X) in immune-mediated liver injury (ILI), and to clarify its mechanism by regulating endoplasmic reticulum stress (ERS)-dependent apoptotic pathway and its association with the clinical progression of hepatitis B. MethodsMice were given injection of concanavalin A (ConA) via the caudal vein to establish a model of ILI, PBS (control group) and different concentrations of ConA were injected into the tail vein of hepatocyte-specific DDX3X-knockout mice (DDX3XΔHep and DDX3X-flox mice (DDX3Xfl/fl), respectively.. The log-rank survival analysis, measurement of the serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT), and HE staining of liver tissue were performed to assess liver injury, and qRT-PCR and Western Blot were used to measure the mRNA and protein expression levels of glucose-regulated protein 78 (GRP78), CCAAT/enhancer-binding protein homologous protein (CHOP), and DDX3X in liver tissue. Intraperitoneal injection of 4-phenylbutyric acid (4-PBA, 100 mg/kg) was performed to inhibit ERS. Serum samples (n=30) and liver tissue samples (n=6) were collected from healthy controls, chronic hepatitis B (CHB) patients, and hepatitis B virus-associated liver failure (HBV-LF) patients; ELISA was used to measure the serum level of DDX3X, and qRT-PCR/Western Blot was used to analyze the expression of targets in liver tissue. A one-way analysis of variance was used for comparison of continuous data between multiple groups, and the least significant difference t-test was used for further comparison between two groups. ResultsCompared with the control group of mice, the expression of DDX3X in the liver of mice induced by ConA was significantly increased after liver injury (P<0.05), and hepatocyte-specific DDX3X knockout increased the 72-hour survival rate of mice by 55% (compared with 20% in the DDX3Xfl/fl group), with significant reductions in the serum levels of ALT and AST (P<0.000 1) and the expression levels of the ERS markers GRP78 and CHOP (P<0.05). After ERS was inhibited by 4-PBA, there was alleviation of liver injury (with reductions in ALT and AST, P <0.001) and a reduction in DDX3X expression (P<0.01). The analysis of clinical samples showed that the mRNA and protein expression levels of liver DDX3X in CHB patients and HBV-LF patients were significantly higher than those in healthy controls (all P<0.01), and there was a significant increase in the serum level of DDX3X in HBV-LF patients (P<0.000 1). ConclusionDDX3X exacerbates ILI by regulating the ERS-dependent apoptotic pathway (GRP78/CHOP), and its expression is associated with the progression of hepatitis B. Therefore, it can be used as a potential therapeutic target.
3.Impact of Nutritional Support on Antitumor Efficacy in the Era of Immunotherapy
Xiaojun QIAN ; Ling LU ; Xuecheng HU ; Shiwei LI ; Wenjun GAO ; Li PAN ; Yubei SUN ; Suyi LI
Cancer Research on Prevention and Treatment 2026;53(2):89-95
Despite breakthroughs in immunotherapy for solid tumors, significant variations in treatment efficacy persist. Up to 80% of cancer patients suffer from malnutrition, which leads to: lymphoid atrophy and reduced T-cell reserves; deficiency of substrates required for T-cell activation and expansion; concurrent inflammation hindering T-cell infiltration into tumors; and cachexia accelerating PD-1 antibody clearance. Clinical studies confirm that severe malnutrition significantly impairs immune responses and increases the risk of treatment toxicity. Therefore, implementing standardized nutritional therapy is crucial for optimizing the reserve, activation, expansion, and infiltration capacity of immune cells, thereby providing a sound immune system foundation for immunotherapy. Immunonutrition therapy, by enhancing immunonutrients such as arginine, omega-3 polyunsaturated fatty acids, and nucleotides, reduces the secretion of pro-inflammatory mediators and promotes T-cell activation and proliferation. This enhances anti-tumor immune responses, prolongs survival, and advances cancer treatment towards multimodal combination and precision approaches.
4.Inverse Association Between Alcohol Consumption and Parkinson’s Disease Risk and Identification of RIT2 as a Linked Biomarker
Wei LU ; Xiu-Li CHENG ; Xiao-Yun PAN ; Dan-Dan YANG ; Hui-Ling ZOU ; Li-Guo DONG ; Yi-Liang WEI ; Gui-Yun CUI
Progress in Biochemistry and Biophysics 2026;53(6):1723-1733
ObjectiveAs a common lifestyle habit, alcohol consumption has a controversial association with the onset of Parkinson’s disease (PD). To demonstrate the correlation between alcohol consumption and PD and to identify associated genes, we integrated findings from clinical surveys, genomics, transcriptomics, and animal experiments. MethodsWe investigated the alcohol consumption rates (including both before and after disease onset) among 244 PD patients in China and 177 PD patients from the U.S. NHANES database. Mendelian randomization (MR) analysis was performed using genome-wide association study (GWAS) data for three alcohol-related traits and seven PD-related datasets from the MRC IEU OpenGWAS database. Transcriptomic data from the substantia nigra of PD patients were obtained from three GEO datasets (GSE7621, GSE20141, and GSE49036) to analyze RIT2 gene transcription. Finally, three groups of animal experiments (water/20% ethanol/20% liquor, with 4 C57BL/6J mice per group) were conducted to examine changes in brain RIT2 gene expression and transcriptomic profiles following alcohol consumption. ResultsThe alcohol consumption rates among PD patients in China and the U.S. (9%-18.87%) were significantly lower than the general population rates of 15%-45% in their respective regions (P<0.001), suggesting a possible negative association between alcohol consumption and PD. Subsequently, in 21 bidirectional MR analyses using 3 alcohol-related GWAS datasets and 7 PD-related GWAS datasets, the forward MR analyses (alcohol intake as exposure, PD as outcome) yielded 12 negative associations (ORIVW<1) and 9 positive associations (ORIVW>1). Among these, only two negative associations reached statistical significance: alcohol intake frequency (ORIVW=0.75, 95% CI: 0.60-0.93, P=0.010) and alcohol consumption (ORIVW=0.20, 95% CI: 0.05-0.83, P=0.026). The forward MR analysis (alcohol intake→PD) identified 235 SNPs, annotated to 316 genes, while the reverse MR analyses (PD→alcohol intake) identified 37 SNPs, annotated to 53 genes. Notably, only the RIT2 gene appeared in both the forward and reverse MR analyses (alcohol intake→PD: rs28597806, rs8083110; PD→alcohol intake: rs4588066). RIT2 is selectively expressed in the human brain (FPKM: 5.259±2.103), with low or no expression in peripheral tissues (FPKM: <1). Analysis of three human substantia nigra transcriptomic datasets revealed a decreasing trend in RIT2 gene expression in PD patients (GSE20141 array signal: 3.49±1.23 vs. 2.33±0.87, P=0.044). Animal experiments demonstrated that administration of 20% ethanol or 20% liquor (approximately 8% ethanol) stimulated a >2-fold upregulation of RIT2 gene expression in the mouse brain. Furthermore, transcriptomic sequencing revealed that the two alcohol-treated groups exhibited 96 (20% ethanol vs. water control) and 4 (20% liquor vs. water control) differentially expressed genes, respectively, indicating that low-dose alcohol consumption can achieve RIT2 upregulation while minimizing impact on other brain genes. In addition to its anti-infective effects, low-dose alcohol consumption primarily influences signaling pathways related to neurodegenerative diseases such as PD and Prion diseases. ConclusionAlcohol consumption is generally considered as a harmful lifestyle habit. However, some studies have also shown a lower risk of mortality among individuals who consume low doses of alcohol (100 g/week of ethanol) or drink occasionally. Currently, one of the research focuses on alcohol consumption is whether the human body can benefit from low-dose alcohol intake. This study provides new evidence supporting a negative association between alcohol consumption and PD, and for the first time, through MR analysis, identifies the RIT2 gene as a potential mediator of the effect of alcohol consumption on PD. RIT2 is selectively expressed in the human brain. Building upon existing evidence indicating downregulated RIT2 gene expression in PD pathogenesis, our experiments confirm that low-dose alcohol consumption can upregulate RIT2 expression in the brain. In brief, alcohol consumption may suppress the pathogenesis of PD by upregulating RIT2 expression in the substantia nigra. China is facing a serious problem of population aging. This study offers important insights for long-term PD prevention and treatment strategies, with the aim of benefiting more potential PD patients through lifestyle modifications, thereby improving the quality of life of the aging population and reducing the economic burden on healthcare.
5.Epidemiological characteristics and prevention strategies of gouty arthritis in Northwest China in 2023-2025
Ling FU ; Ning CUI ; Peijie XIA ; Nan ZHAO ; Aiqing PAN ; Xiaomin RAN ; Fei CHEN ; Kaiyue CAO
Journal of Public Health and Preventive Medicine 2026;37(4):56-60
Objective To explore the epidemiological characteristics of gouty arthritis in Northwest China from 2023 to 2025, and to formulate preventive intervention measures. Methods By retrospectively analyzing the case data of medical institutions in Northwest China from January 2023 to June 2025 (a total of 8 139 cases), the incidence trend and population distribution characteristics of gouty arthritis in this area were analyzed. Multivariate logistic regression analysis was performed to identify risk factors. Results From 2023 to 2025, the prevalence rate of gouty arthritis in adult residents in Northwest China was 3.74% (304/8 139). Among the sites affected by gouty arthritis, the metatarsophalangeal joint accounted for the highest proportion (P<0.05). From the perspective of age distribution, the prevalence rate was the highest in 40-59 years old group (5.90%), followed by 66-80 years old group (4.21%) and >80 years old group (2.75%). The incidence rate in 40-65 years old group was higher than that in the other age groups (P<0.05). High blood uric acid and creatinine, alcohol drinking, obesity, high purine diet, concurrent chronic kidney disease and metabolic syndrome were risk factors affecting gouty arthritis in Northwest China (P<0.05). Conclusion High blood uric acid level, high creatinine level, alcohol drinking, obesity, high purine diet, concurrent chronic kidney disease and metabolic syndrome are risk factors influencing gouty arthritis in Northwest China. Based on the above factors, this study proposes comprehensive prevention strategies from the individual, community and public health levels to provide a scientific basis for reducing the incidence rate of gouty arthritis.
6.Clinical practice guidelines for intraoperative cell salvage in patients with malignant tumors
Changtai ZHU ; Ling LI ; Zhiqiang LI ; Xinjian WAN ; Shiyao CHEN ; Jian PAN ; Yi ZHANG ; Xiang REN ; Kun HAN ; Feng ZOU ; Aiqing WEN ; Ruiming RONG ; Rong XIA ; Baohua QIAN ; Xin MA
Chinese Journal of Blood Transfusion 2025;38(2):149-167
Intraoperative cell salvage (IOCS) has been widely applied as an important blood conservation measure in surgical operations. However, there is currently a lack of clinical practice guidelines for the implementation of IOCS in patients with malignant tumors. This report aims to provide clinicians with recommendations on the use of IOCS in patients with malignant tumors based on the review and assessment of the existed evidence. Data were derived from databases such as PubMed, Embase, the Cochrane Library and Wanfang. The guideline development team formulated recommendations based on the quality of evidence, balance of benefits and harms, patient preferences, and health economic assessments. This study constructed seven major clinical questions. The main conclusions of this guideline are as follows: 1) Compared with no perioperative allogeneic blood transfusion (NPABT), perioperative allogeneic blood transfusion (PABT) leads to a more unfavorable prognosis in cancer patients (Recommended); 2) Compared with the transfusion of allogeneic blood or no transfusion, IOCS does not lead to a more unfavorable prognosis in cancer patients (Recommended); 3) The implementation of IOCS in cancer patients is economically feasible (Recommended); 4) Leukocyte depletion filters (LDF) should be used when implementing IOCS in cancer patients (Strongly Recommended); 5) Irradiation treatment of autologous blood to be reinfused can be used when implementing IOCS in cancer patients (Recommended); 6) A careful assessment of the condition of cancer patients (meeting indications and excluding contraindications) should be conducted before implementing IOCS (Strongly Recommended); 7) Informed consent from cancer patients should be obtained when implementing IOCS, with a thorough pre-assessment of the patient's condition and the likelihood of blood loss, adherence to standardized internally audited management procedures, meeting corresponding conditions, and obtaining corresponding qualifications (Recommended). In brief, current evidence indicates that IOCS can be implemented for some malignant tumor patients who need allogeneic blood transfusion after physician full evaluation, and LDF or irradiation should be used during the implementation process.
7.Inhibition of the Arp2/3 Complex Attenuates Angiotensin Ⅱ-Induced Cardiomyocyte Hypertrophy
Li LING ; Cong-Bin PAN ; Lu-Xuan WAN ; Zhuang-Zhuang YANG ; Zhan-Hong REN
Chinese Journal of Biochemistry and Molecular Biology 2025;41(9):1332-1341,中插1-中插5
Pathological cardiac hypertrophy is an early and significant cardiac structural charac-teristic that contributes to the onset and progression of heart failure(HF).Its mainly structural feature is the abnormally enlarged cardiomyocyte.Effective intervention targets for abnormally en-larged cardiomyocyte remain to be identified.Previous studies have shown that the cellular shape and size can be regulated by the actin related protein 2/3(Arp2/3)complex,which is an actin-binding protein complex involved in the actin nucleation and assembly.However,the roles of the Arp2/3 complex in cardiomyocyte hypertrophy remain unknown.Here our study identifies its no-vel roles in the occurrence and development of cardiomyocyte hypertrophy.We found that mRNA levels of all subunits from the Arp2/3 complex are significantly upregulated(P<0.05)in the an-giotensin II(Ang Ⅱ)-induced neonatal rat primary and H9c2 cardiomyocyte hypertrophy.Fur-ther studies showed that siRNA-directed ARPC2 silencing inhibits the reactivation of fetal genes and enlargement of cardiomyocyte area induced by Ang Ⅱ in neonatal rat primary cardiomyocytes(NRCMs)and H9c2 cells(P<0.05).In addition,the upstream activators of the Arp2/3 com-plex including SH3 protein interacting with Nck,90 kD(SPIN90)and Ras-related C3 botulinum toxin substrate 1(Rac1)/WASp family Verprolin-homologous protein-2(WAVE-2)are upregu-lated(P<0.05)in Ang Ⅱ-induced neonatal rat primary and H9c2 cardiomyocyte hypertrophy,indicating the excessive activation of the Arp2/3 complex.We further show that CK666,a specif-ic Arp2/3 complex inhibitor,prevents the reactivation of fetal genes and the enlargement of car-diomyocyte area induced by Ang Ⅱ in NRCMs and H9c2 cells(P<0.05).Our results reveal that the Arp2/3 complex plays a crucial role in Ang Ⅱ-induced cardiomyocyte hypertrophy,which is beneficial to further studies about the molecular mechanisms by which the Arp2/3 complex regu-lates pathological cardiac hypertrophy.
8.Two cases of anti-glomerular basement membrane disease with IgA nephropathy and literature review
Xiaohua LI ; Meiju WEI ; Zhenhua YANG ; Ling PAN
Chinese Journal of Nephrology 2025;41(1):31-37
Objective:To report two cases of anti-glomerular basement membrane (GBM) disease with IgA nephropathy (IgAN), and summarize the clinical characteristics of these patients through systematic literature review, for providing clinical data for the diagnosis and treatment of this disease.Methods:It was a case-series analysis. Clinical data of two cases with anti-GBM disease and IgAN diagnosed in the First Affiliated Hospital of Guangxi Medical University were collected. The course of their diagnosis and treatment was described. Besides, the relevant literature of anti-GBM disease with IgAN cases reported in PubMed and CNKI databases from the establishment of the database to June 30, 2024 were retrived, and the relevant clinical data were extracted for analysis and summary. Patients were divided into end-stage renal disease (ESRD) group and non-ESRD group according to renal outcome, and the differences in age, gender, hemoglobin, creatinine at diagnosis, proportion of hypuria/anuria, qualitative grade of urinary protein, and proportion of renal crescent were compared between the two groups.Results:Two patients were both young women. The pathology of renal tissue suggested crescentic glomerulonephritis. The pathological manifestations were linear deposition of IgG along GBM and deposition of immune complex dominated by IgA in mesangial region. At the initial diagnosis, the renal function damage of the case one was not severe. After plasma exchange, glucocorticoid and cyclophosphamide treatment, the renal function recovered. The kidney function of the case two was obviously impaired at the initial diagnosis, and was improved after the above treatment, but aggravated due to infection, and continued to progress into ESRD. Twenty-six literates involving 40 cases of anti-GBM disease with IgAN were retrieved. A total of 42 cases of anti-GBM disease with IgAN, including 2 cases in this report, were analyzed and summarized. The age was (41.3±17.5) years old, 45.2% were male, 39 cases (92.9%) were from Asia. The hemoglobin was (94.4±15.1) g/L, the serum creatinine was 450.8 (284.4, 755.8) μmol/L, 83.3% (35/42) patients had crescent ratio greater than 50% and 37 patients (88.1%) patients were treated with intravenous methylprednisolone and cytotoxic immunosuppressive drugs. Plasma exchange was performed in 34 patients (81.0%) patients, 23 patients (54.8%) had renal function recovered and 17 patients (40.5%) entered ESRD. Compared with the non-ESRD group, the serum creatinine in the ESRD group was higher at initial diagnosis ( P<0.01), and the proportion of hypuria/anuria was higher ( P=0.03). There were no statistically significant differences in age, sex, hemoglobin, urinary protein and crescent proportion between the two groups (all P>0.05). Conclusions:Compared with anti-GBM disease, anti-GBM with IgAN has a smoother course and a better prognosis. Infection should be actively prevented during treatment.
9.Development and application of an evidence-based nutritional management protocol for head and neck cancer patients undergoing radiotherapy
Hongling HU ; Haiqing PAN ; Shilong NING ; Pei XIAO ; Ermei JIAN ; Fangping LUO ; Ling ZHOU
Chinese Journal of Modern Nursing 2025;31(34):4658-4664
Objective:To develop a nutritional management protocol for head and neck cancer (HNC) patients undergoing radiotherapy based on evidence-based methodology, and to evaluate its clinical effectiveness.Methods:Relevant literature on nutritional management in radiotherapy for HNC patients was systematically searched. After evidence extraction, a preliminary protocol was drafted and finalized through expert consensus. The finalized protocol included five timepoints during hospitalization, covering six components and 35 nursing and clinical care items. A quasi-experimental design was adopted. Using convenience sampling, 100 HNC patients admitted to Jinhua Municipal Central Hospital from October 2022 to June 2024 were enrolled. Patients treated between October 2022 and July 2023 formed the control group ( n=50), and those treated from September 2023 to June 2024 comprised the intervention group ( n=50). The control group received routine care, while the intervention group was managed with the evidence-based nutrition protocol. Body weight and nutrition-related laboratory indicators were measured before radiotherapy, at week 4, and at the end of week 6. Results:At week 4 of radiotherapy, the intervention group had a higher lymphocyte count than the control group, with statistically significant differences ( P<0.05). At week 6, total serum protein, serum albumin, and lymphocyte counts were all higher in the intervention group, with statistically significant differences ( P<0.05) . Conclusions:The evidence-based nutritional management protocol developed for HNC patients undergoing radiotherapy effectively improves nutritional status. It provides a valuable reference for healthcare professionals in clinical practice.
10.Inhibition of the Arp2/3 Complex Attenuates Angiotensin Ⅱ-Induced Cardiomyocyte Hypertrophy
Li LING ; Cong-Bin PAN ; Lu-Xuan WAN ; Zhuang-Zhuang YANG ; Zhan-Hong REN
Chinese Journal of Biochemistry and Molecular Biology 2025;41(9):1332-1341,中插1-中插5
Pathological cardiac hypertrophy is an early and significant cardiac structural charac-teristic that contributes to the onset and progression of heart failure(HF).Its mainly structural feature is the abnormally enlarged cardiomyocyte.Effective intervention targets for abnormally en-larged cardiomyocyte remain to be identified.Previous studies have shown that the cellular shape and size can be regulated by the actin related protein 2/3(Arp2/3)complex,which is an actin-binding protein complex involved in the actin nucleation and assembly.However,the roles of the Arp2/3 complex in cardiomyocyte hypertrophy remain unknown.Here our study identifies its no-vel roles in the occurrence and development of cardiomyocyte hypertrophy.We found that mRNA levels of all subunits from the Arp2/3 complex are significantly upregulated(P<0.05)in the an-giotensin II(Ang Ⅱ)-induced neonatal rat primary and H9c2 cardiomyocyte hypertrophy.Fur-ther studies showed that siRNA-directed ARPC2 silencing inhibits the reactivation of fetal genes and enlargement of cardiomyocyte area induced by Ang Ⅱ in neonatal rat primary cardiomyocytes(NRCMs)and H9c2 cells(P<0.05).In addition,the upstream activators of the Arp2/3 com-plex including SH3 protein interacting with Nck,90 kD(SPIN90)and Ras-related C3 botulinum toxin substrate 1(Rac1)/WASp family Verprolin-homologous protein-2(WAVE-2)are upregu-lated(P<0.05)in Ang Ⅱ-induced neonatal rat primary and H9c2 cardiomyocyte hypertrophy,indicating the excessive activation of the Arp2/3 complex.We further show that CK666,a specif-ic Arp2/3 complex inhibitor,prevents the reactivation of fetal genes and the enlargement of car-diomyocyte area induced by Ang Ⅱ in NRCMs and H9c2 cells(P<0.05).Our results reveal that the Arp2/3 complex plays a crucial role in Ang Ⅱ-induced cardiomyocyte hypertrophy,which is beneficial to further studies about the molecular mechanisms by which the Arp2/3 complex regu-lates pathological cardiac hypertrophy.


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