Myocardial infarction (MI), a leading global cause of death, triggers substantial cardiomyocyte loss and heart dysfunction. Current treatments, including guideline-directed cardioprotective drugs and revascularization, face limitations such as poor durability, donor shortages, and immune rejection. Injectable hydrogels and cardiac patches offer promising avenues for post-MI tissue regeneration, with electrical conductivity enhancing cardiac function. Curcumin-gold nanoparticles (AuNPs) further mitigate inflammation, oxidative stress, and infarct size. This study integrates curcumin-AuNPs with an electroconductive nanocomposite hydrogel via green chemistry, using curcumin as both a reducing and stabilizing agent. The resulting AuNPs exhibited a diameter of 32 ± 9 nm and zeta potential of -29.6 mV. Incorporation into the hydrogel yielded a porous nanocomposite (70%-80% porosity with interconnected pores, confirmed by SEM) that was biocompatible and multifunctional. In vitro antioxidant assays showed dose-dependent radical scavenging by AuNPs, peaking at 50 μg/mL. In isoproterenol-induced myocardial injury rats, hydrogel/AuNP administration significantly attenuated cardiac damage, reducing inflammation, oxidative stress, and infarct size while preserving function. These findings demonstrate that curcumin-mediated AuNPs enable multifunctional, porous, antioxidant, and cardioprotective hydrogels with strong preclinical potential for MI repair and cardiovascular therapies.

Nanozyme-involved biosensing platforms show great potential in the accurate detection of trace analytes. Nevertheless, the rational design of high-performance nanozymes remains a significant challenge. Overcoming this hurdle is crucial for developing advanced immunoassays and, ultimately, for the construction of portable point-of-care testing devices. We successfully synthesized ultrathin PdMo metallene nanosheets (d-PdMoene), featuring a high density of defects, exhibiting efficient catalase-like activity (CAT-like activity) capable of catalyzing H2O2 into H2O and O2. Theoretical calculations reveal that d-PdMoene exhibits significant charge redistribution and upward shift of the d-band center, suggesting a superior electronic configuration for catalysis and enhancement of H2O2 adsorption. Besides, compared to PdMoene, a weaker bonding interaction between O2∗ and the d-PdMoene promotes easier O2 release. The generated O2 induces noticeable pressure changes, which can be easily monitored by a portable pressure gauge. As a concept application, an immunoassay sensor for prostate specific antigen was established, demonstrating high sensitivity and selectivity. Beyond the immediate outcomes, this study carries broader implications. It establishes a robust framework for the rational design of high-performance nanozymes and, concurrently, outlines a practical pathway toward the realization of portable testing devices.

BackgroundCardiovascular-kidney-metabolic (CKM) syndrome integrates metabolic, renal, and cardiovascular risks. While C-reactive protein-triglycerides-glucose (CTI)-related indices are associated with future depression risk, their link to incident depression in populations across CKM stages 0–4 remains unestablished.MethodsThis prospective cohort included 3,130 depression-free participants across CKM stages 0–4 from the China Health and Retirement Longitudinal Study. Four machine learning algorithms determined the core covariates for multivariable adjustments. Receiver operating characteristic (ROC) curves, net reclassification improvement (NRI), and integrated discrimination improvement (IDI) assessed the predictive performance of CTI-related indices. Multivariable Cox models, restricted cubic splines, and K-means clustering evaluated associations of the optimal indicator’s baseline, cumulative, and trajectory exposures with incident depression. An independent clinical cohort (n=350) provided directional replication.ResultsOver a 9-year median follow-up, 1,275 participants developed depression. The CTI-Chinese visceral adiposity index (CTI-CVAI) achieved the highest AUC (0.705), providing incremental predictive value (NRI = 0.126, IDI = 0.005; P < 0.001). The fully adjusted model revealed a decreased depression risk with higher baseline CTI-CVAI (HR per 1-SD=0.91, 95% CI: 0.85-0.96). A linear dose-response relationship was observed for both baseline and cumulative CTI-CVAI. Furthermore, individuals in the high-increasing trajectory group (HR = 0.81, 95% CI: 0.69-0.97) and the highest cumulative exposure tertile (HR = 0.87, 95% CI: 0.76-0.97) exhibited significantly lower depression risks. This inverse association was primarily prominent in participants aged <60 years (P for interaction=0.032). The external validation cohort replicated the moderate discriminatory power (AUC = 0.691) and the independent inverse association of CTI-CVAI with incident depressive symptoms (OR per 1-SD=0.92, P < 0.001).ConclusionsCTI-CVAI is an independent predictor with moderate discrimination for incident depression in populations across CKM stages 0-4. These findings support its potential as a candidate marker, suggesting moderate cardiometabolic and nutritional reserves may be associated with better mental health in middle-aged and older adults across CKM stages 0-4.

Given the excessive levels of reactive oxygen species (ROS) and inflammation within the atherosclerotic microenvironment, developing effective synergistic strategies to modulate ROS and inflammation has garnered significant attention for mitigating atherosclerosis. In this study, we engineered a pH-responsive functionalized mesoporous silica nanoparticle (MSN) loaded with cerium ions and rosuvastatin (RSV), designated as MSN@Ce/RSV-PT, aimed at achieving multifaceted regression of atherosclerosis. This nanosystem, with a diameter of 212.4 +/- 4.7 nm, enables macrophage reprogramming by ROS through the multi-enzyme-like activity of cerium ions and responsively releasing RSV in the acidic atherosclerotic microenvironment, thereby synergistically alleviating atherosclerosis. In vitro studies demonstrated that MSN@Ce/RSV-PT exhibits pH-responsive anti-atherosclerotic effects via ROS scavenging (The ABTS(+) scavenging rate was approximately 83.3%), inflammation reduction and macrophage reprogramming. Furthermore, in vivo experiments disclosed the decreased M1/M2 phenotypic macrophage ratio (from 4.3 to 0.59), confirming that MSN@Ce/RSV-PT effectively treats atherosclerosis by mitigating oxidative stress and inflammation in atherosclerotic mice. These findings validate MSN@Ce/RSV-PT as a promising synergistic therapeutic approach for accurately and efficiently managing atherosclerotic cardiovascular diseases.

Background: The correlation between fibrinogen levels and adrenocortical carcinoma (ACC) remains unclear. This study aimed to explore the value of preoperative plasma fibrinogen as a biomarker for ACC. Methods: We identified 40 patients with ACC and 170 patients with adrenal adenoma (AA) who underwent surgery at our institution between 2015 and 2022. Plasma fibrinogen levels and postoperative tumor recurrence information of the patients were also recorded. For intergroup comparisons, data obtained from the AA and ACC groups were evaluated using a t -test. The cutoff value of fibrinogen level was determined using a receiver operating characteristic (ROC) curve. Results: Mean fibrinogen levels in the AA and ACC groups were 2.81 ± 0.59 g/L and 3.88 ± 1.75 g/L, respectively ( P < .001). Fibrinogen level, which can help distinguish between AA and ACC, was evaluated using the ROC curve. The cutoff fibrinogen level was estimated as 3.87 g/L according to the Youden index. With this value, the sensitivity was 62.5%, specificity was 95.7%, and the area under the ROC curve (AUC) was 0.74 ( P < .001). Fibrinogen level, which can help distinguish between recurrence and non-recurrence, was evaluated using the ROC curve. The cutoff fibrinogen level was estimated as 3.96 g/L according to the Youden index. The sensitivity, specificity, and AUC were 90%, 71.4%, and 0.85, respectively ( P < .001). Conclusion: According to the data in this study, plasma fibrinogen could be used to distinguish ACC from AA. Most importantly, plasma fibrinogen may be used to identify recurrence of postoperative ACC.

Stimulus-responsive polymers have found widespread use in biomedicine due to their ability to alter their own structure in response to various stimuli, including internal factors such as pH, reactive oxygen species (ROS), and enzymes, as well as external factors like light. In the context of atherosclerotic cardiovascular diseases (CVDs), stimulus-response polymers have been extensively employed for the preparation of smart nanocarriers that can deliver therapeutic and diagnostic drugs specifically to inflammatory lesions. Compared with traditional drug delivery systems, stimulus-responsive nanosystems offer higher sensitivity, greater versatility, wider applicability, and enhanced biosafety. Recent research has made significant contributions towards designing stimulus-responsive polymer nanosystems for CVDs diagnosis and treatment. This review summarizes recent advances in this field by classifying stimulus-responsive polymer nanocarriers according to different responsiveness types and describing numerous stimuli relevant to these materials. Additionally, we discuss various applications of stimulus-responsive polymer nanomaterials in CVDs theranostics. We hope that this review will provide valuable insights into optimizing the design of stimulus-response polymers for accelerating their clinical application in diagnosing and treating CVDs. Stimuli-responsive polymer-based nanosystems have gained significant attention for cardiovascular disease theranostics. This review summarizes various stimuli-responsive nanosystems used for diagnosing and treating cardiovascular diseases.

PurposeNon-obstructive azoospermia (NOA) is a severe and common cause of male infertility. Currently, the most reliable predictor of sperm retrieval success in NOA is histopathology, but preoperative testicular biopsy often increases the difficulty of sperm retrieval surgery. This study aims to explore the characteristics of N6-methyladenosine (m6A) modification in NOA patients and investigate the potential biomarkers and molecular mechanisms for pathological diagnosis and treatment of NOA using m6A-related genes.MethodsNOA-related datasets were downloaded from the GEO database. Based on the results of LASSO regression analysis, a prediction model was established from differentially expressed m6A-related genes, and the predictive performance of the model was evaluated using ROC curves. Cluster analysis was performed based on differentially expressed m6A-related genes to evaluate the differences in different m6A modification patterns in terms of differentially expressed genes (DEGs), biological features, and immune features.ResultsThere were significant differences in eight m6A-related genes between NOA samples and healthy controls. The ROC curves showed excellent predictive performance for the diagnostic models constructed with ALKBH5 and FTO. DEGs of two m6A modification subtypes indicated the influence of m6A-related genes in the biological processes of mitosis and meiosis in NOA patients, and there were significant immune differences between the two subtypes.ConclusionThe NOA pathological diagnostic models constructed with FTO and ALKBH5 have good predictive ability. We have identified two different m6A modification subtypes, which may help predict sperm retrieval success rate and treatment selection in NOA patients.

BACKGROUND:The aim was to explore the value of neutrophil-lymphocyte ratio (NLR) as a biomarker for predicting the prognosis or diagnosis in adrenocortical carcinoma (ACC). METHODS:We identified 262 patients with adrenal gland disease who underwent operation at our institution between 2013 and 2018. According to postoperative pathology, patients were divided into 2 groups: ACC and non-ACC groups. The neutrophil and lymphocyte count of patients were recorded. Within the intergroup comparison, data obtained from ACC and non-ACC groups were evaluated using ANOVA test. The cut-off values of NLR for the prognosis in ACC were determined according to 3 methods. RESULTS:The NLR values of ACC and non-ACC groups were 5.36 ± 5.30 and (1.73 ± 0.26) ∼ (2.56 ± 1.35), respectively (P < .001). NLR carry a differential property was evaluated with ROC curve to distinguish the above 2 groups. The cut-off value of NLR was estimated as 2.65 according to the Youden index. With this value, sensitivity was found as 67.5%, specificity was 83.8% and AUC was 0.749 (P < .001, confidence interval = 0.638-0.860). In ACC, the higher NLR group was not shown significantly poorer overall survival than the lower NLR group (NLR ≥2.65 vs. NLR < 2.65, NLR ≥5 vs. NLR <5, NLR ≥5.36 vs. NLR <5.36) (P > .05). CONCLUSION:According to the data in this study, it can be said that adrenocortical tumors are likely to be malignant by 67.5% if the NLR value is greater than 2.65. When we use the NLR to predict the prognosis of ACC, there is not statistically significant.

PURPOSE:The aim was to explore the preoperative and postoperative fibrinogen changes value (FCV) as a prognosis biomarker for in patients with adrenocortical carcinoma (ACC). METHODS:We identified 42 patients with ACC and 190 patients with adrenal adenoma (AA) who underwent surgery at our institution between 2015 and 2023. Preoperative fibrinogen, postoperative fibrinogen and follow-up information of the patients were recorded and analysed. The relationship between FCV and overall survival (OS)/ relapse-free survival (RFS) was evaluated. RESULTS:The mean level of preoperative and postoperative fibrinogen for ACC were 4.00 ± 1.64 g/L and 2.75 ± 0.59 g/L, respectively (p < 0.001). The mean level of preoperative and postoperative fibrinogen for AA were 2.79 ± 0.59 g/L and 2.71 ± 0.58 g/L, respectively (p = 0.144). In ACC, the lower FCV (≤ 1.25 g/L) showed a significantly poorer RFS than the higher (> 1.25 g/L) (p = 0.007); however, the lower FCV (≤ 1.25 g/L) showed no poorer OS than the higher (> 1.25 g/L) (p = 0.243). On multivariate survival analyses, FCV remained a predictor of RFS (HR 3.138). CONCLUSION:According to the data in this study, it can be said that FCV is correlated with prognosis of ACC. The FCV might be a new biomarker for predicting the RFS of ACC.

Abstract Background Despite surgical and medical efforts in the upfront treatment, about 70% of OC patients have a disease relapse within 2–3 years after diagnosis. ROC is still an incurable condition; targeted agents as maintenance therapies have been shown to improve survival, but the most appropriate maintenance regimens are still controversial and opaque.Objective This Bayesian network meta-regression analysis provides a head-to-head comparison of maintenance therapy PARP-Inhibitors and Angiogenesis Inhibitors for Platinum-Sensitive Recurrent Ovarian Cancer(PSROC) using the BRCA genes status as a covariate.Methods To identify relevant studies, the databases of Pubmed, Scopus, Embase, Web of Science, and the Cochrane Central Register of Controlled Trials were searched until January 31, 2023. Comparing progression-free survival (PFS) and overall survival (OS) of different interventions at the same time node by NMA. NMR was performed on the hazard ratios (HR) associated with PFS and OS as the primary endpoints, with the BRCA genes status as the covariate. The ability of each treatment was ranked using the surface under the cumulative ranking (SUCRA) curve.Results Eventually,16 studies with 5696 patients and 8 maintenance therapy were enrolled.From a horizontal perspective,bevacizumab(HR = 1.83, 95%CI: 1.47 to 2.33), niraparib(HR = 2.9, 95%CI: 2.15 to 3.95), olaparib (HR = 2.74, 95%CI: 2.05 to 3.6) ,rucaparib (HR = 2.61, 95%CI: 1.81 to 3.57) and fuzuloparib (HR = 3.99, 95%CI: 2.41 to 6.6) were significantly superior to the placebo on PFS of AC.Niraparib(HR = 4.08, 95%CI: 1.49 to 11.33), olaparib (HR = 4.29, 95%CI: 1.9 to 9.75) ,rucaparib (HR = 4.16, 95%CI: 1.04 to 16.49) and fuzuloparib(HR = 7.16, 95%CI: 1.63 to 30.82) were significantly superior to the placebo on PFS of BRCAm.Niraparib(HR = 2.33, 95%CI: 1.17 to 4.7) was significantly superior to the placebo on PFS of BRCAwt.From a longitudinal perspective, the results for PFS are similar to the above; Olaparib significantly increased OS rates from the 3rd to the 36th month(HR from4.43 to26.55). Meta-regression analyses support the above conclusions.Conclusions Considering the efficacy, durability, safety, and compliance, one of the standard maintenance therapy, Olaparib, should be recommended as the best choice for PSROC. For BRCAm and BRCAwt patients,Olaparib and niraparib may be the first choice for improving PFS.Furthermore, more head-to-head trials are needed to confirm those findings.

BACKGROUND:Muscle damage leads to increased serum creatine kinase (CK) levels in diseases such as acute myocardial infarction. Still, many individuals have abnormal serum CK activities lacking muscle-related diagnoses. The current study hypothesized that failed or overactivated CK clearance by non-muscle organs/tissues might be responsible for increased or decreased CK activities in blood.METHODS:We analyzing 37,081 independent CK test results in 36 human diseases during the past 5 y.RESULTS:We found that 33 out of 36 diseases were associated with decreased median CK activities compared to healthy controls. Besides muscle damage-related conditions, the highest mean CK activities were observed in hepatitis and cirrhosis. In contrast, 6 blood cell-related illnesses had the lowest mean CK values. ROC analysis showed that CK activities were the best biomarkers (AUC: 0.80-0.94) for the 6 blood-related diseases, especially myeloproliferative disorders. The principal component analysis revealed that the same category of diseases, such as liver-, blood -, kidney-, cancers, and vascular-related diseases, had clustered CK distributions.CONCLUSIONS:We proposed that the liver and blood cells were mainly responsible for CK clearance in blood circulation based on overall results. The testable mechanisms were presented and discussed.

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation. The corresponding author failed to provide a satisfactory explanation. The editors therefore feel that the findings of the manuscript cannot be relied upon and that the article needs to be retracted.

Background: Varicocele is one of the common causes of infertility. In this study, we investigated whether levocarnitine could improve sperm density and viability in a varicocele rat model and change the Cation Channel of Sperm 1 (CatSper1) expression. Methods: Sixty male rats were randomly divided into six groups (n = 10 in each group): Control group, varicocele group, varic-ocele + normal saline group, and varicocele + small-, middle-, and large-dose of levocarnitine groups. Varicocele experimental model was established by partial ligation of the left renal vein. Twelve weeks later, the animals in the varicocele + normal saline group were gavaged with normal saline (1 mL center dot kg-1 center dot d-1), while the animals in groups varicocele + small-, middle-, large-dose le-vocarnitine were respectively gavaged with levocarnitine of different concentrations (0.01, 0.02, 0.03 g center dot kg-1 center dot d-1) for consecutive 35 days. We measured the semen parameters by computer-assisted semen analysis (CASA) and CatSper1 in sperms by Reverse Transcription-Polymerase Chain Reaction (RT-PCR). Results: We found that sperm density, percentage of sperm motility with grade a + b and sperm viability were remarkably higher in the varicocele + small-, middle-and large-dose levocarnitine groups compared to the varicocele + normal saline group (p < 0.01). CatSper1 expression in sperms was significantly increased in varicocele + middle-and large-dose levocarnitine, compared to the varicocele + normal saline group (p < 0.01). Conclusions: Middle-and large-dose levocarnitine could increase sperm density and viability by increasing CatSper1 expression. Levocarnitine might be beneficial to asthenozoospermia caused by varicocele.

Spermatogenesis is a multistep biological process. In addition to somatic cells, it involves the orderly differentiation of dozens of spermatogenic cells. In this process, the regulatory networks between different spermatogenic cell populations are significantly different. RNA m6A regulators and miRNAs have been found to be closely related to spermatogenesis in recent years, and they are an important part of the above regulatory networks. Understanding gene expression and its rules in different spermatogenic cell populations will help in the in-depth exploration of their detailed roles in spermatogenesis. This study collected a public dataset of nonobstructive azoospermia (NOA). Based on the Johnson score, the testicular samples of NOA were divided into three types, Sertoli-cell only syndrome, meiotic arrest and postmeiotic arrest, which represented the loss of three germ cell populations, including whole spermatogenic cells, postmeiotic spermatogenic cells, and a mixture of late spermatids and spermatozoa, respectively. The aforementioned three types of testis data were compared with normal testis data, and the molecular expression characteristics of the abovementioned three germ cell populations were obtained. Our study showed that different germ cell populations have different active molecules and their pathways. In addition, RNA m6A regulators, including METTL3, IGF2BP2 and PRRC2A, and miRNAs, including hsa-let-7a-2, hsa-let-7f-1, hsa-let-7g, hsa-miR-15a, hsa-miR-197, hsa-miR-21, hsa-miR-30e, hsa-miR-32, hsa-miR-503 and hsa-miR-99a, also presented regulatory roles in almost all germ cells.

Abstract Objective To investigate the inflammatory factors and clinical outcomes of the middle and upper calyceal renal calculi after flexible ureterorenoscopy without the usage of the ureteral stent. Data and Methods: 150 patients were randomly divided into three groups: Group A, Group B and Group C. In Group A, double-J stent was implanted preoperatively, but not postoperatively. In Group C, Double-J stent was implanted postoperatively, but not preoperatively. In Group B, double-J stent were implanted preoperatively and postoperatively. Finally, the inflammatory factors and clinical effects of the 3 groups were compared. Results There is a significant difference in operation time among the 3 groups with group A having the shortest time (P < 0.05). There have been no significant differences in stone clearance rate (P > 0.05). Additionally, it is observed that the incidence of postoperative hematuria and bladder irritation in group A has been comparatively lower than those in groups B and C (P < 0.01). At 24 hours after the operation among the 3 groups, and the incidence of fever between groups A and B observed has been considerably lower than that of group C (P < 0.05). Lastly, CRP and WBC in group A and B were lower than those in group C after operation(P < 0.05). Conclusion For the patients with middle and upper calyceal renal calculi, by prepositioning double-J stent before the operation along with the absence of ureteral stent after the flexible ureterorenoscopy, it has been presented that the operation time can be effectively reduced. At the same time, it will not affect the postoperative clearance rate, significantly reduce the incidence of postoperative complications, and will also not increase the postoperative-related inflammatory factors.

After decades of research, we still face great challenges on endometriosis in terms of diagnosis and management. Serum CA125 has been used in the clinical practice in endometriosis, and many large-scale clinical trials have been conducted or are underway to determine potential use of serum CA125 levels in endometriosis. In this article, relevant articles that addressed endometriosis associated with CA125 were searched for and retrieved from the databases PubMed, Embase and the Cochrane Library. Here we provide an in-depth literature review to depict CA125 dynamic expression in female reproductive tract and to highlight the practical value of CA125 in diagnosing endometriosis, distinguishing the severity of the disease, monitoring the effect of treatment and reflecting malignant transformation. So far, the development of a risk stratification system based on biomarker CA125 for endometriosis may help clinicians in making novel and more efficient strategies for the detection and treatment of endometriosis. In order to improve CA125 specificity and sensitivity, further research is needed to determine its diagnostic cut-off value.

In the current study, by solvothermal reaction of Cu(NO3)2·3H2O or Co(NO3)2·6H2O with the H4Tdada ligand in a mixed solvent of H2O and DMA, two novel coordination polymers (CPs) were prepared and their chemical formulae are {[(CH3)2NH2]2[Co(Tdada)](H2O)3}n (1) and {[Cu2(Tdada)(H2O)(DMA)](DMA)3}n (2, H4Tdada ​= ​5,5′-((thiophene-2,5-dicarbonyl) bis(azanediyl)) diisophthalic acid). The single crystal X-diffraction studies show that compound 1 shows a 3D 2-fold interpenetrated framework with a 4-connected dia topology and compound 2 shows a non-interpenetrated framework with a 4-connected lon topology. The magnetic investigations indicate that the two compounds possess antiferromagnetic coupling between neighboring metallic ions, and the Curie-Weiss constant is −7.5 ​K for 1 and -6.04 ​K for 2, respectively. Their treatment activity on viral myocarditis was evaluated and the related mechanism was discussed at the same time. First of all, the Cell Counting Kit-8 was carried out to evaluate the toxicity of compounds 1 and 2. The Annexin V-FITC Apoptosis Detection Kit was conducted and the apoptosis of the virus infected cardiomyocytes was measured. In addition to this, the ELISA detection was used to measure the hs-cTnT in the cardiomyocytes after compound 1 or 2 treatment.

In the current study, by solvothermal reaction of Cu(NO3)2·3H2O or Co(NO3)2·6H2O with the H4Tdada ligand in a mixed solvent of H2O and DMA, two novel coordination polymers (CPs) were prepared and their chemical formulae are {[(CH3)2NH2]2[Co(Tdada)](H2O)3}n (1) and {[Cu2(Tdada)(H2O)(DMA)](DMA)3}n (2, H4Tdada ​= ​5,5′-((thiophene-2,5-dicarbonyl) bis(azanediyl)) diisophthalic acid). The single crystal X-diffraction studies show that compound 1 shows a 3D 2-fold interpenetrated framework with a 4-connected dia topology and compound 2 shows a non-interpenetrated framework with a 4-connected lon topology. The magnetic investigations indicate that the two compounds possess antiferromagnetic coupling between neighboring metallic ions, and the Curie-Weiss constant is −7.5 ​K for 1 and -6.04 ​K for 2, respectively. Their treatment activity on viral myocarditis was evaluated and the related mechanism was discussed at the same time. First of all, the Cell Counting Kit-8 was carried out to evaluate the toxicity of compounds 1 and 2. The Annexin V-FITC Apoptosis Detection Kit was conducted and the apoptosis of the virus infected cardiomyocytes was measured. In addition to this, the ELISA detection was used to measure the hs-cTnT in the cardiomyocytes after compound 1 or 2 treatment.

Abstract: This study aimed to evaluate the protective effect of quercetin and its in-depth mechanism in TNF-α-stimulated cardiomyocytes. The differential expression of TNF-alpha (TNF-α) and signal transducer and activator of transcription 1 (STAT1) was analyzed based on the GEO database. H9c2 cells were stimulated with TNF-α to simulate myocarditis. Cell counting kit-8 assay and flow cytometry assay were performed to detect the cell viability and apoptosis. ELISA was used to measure the levels of proinflammatory cytokines (IL-6 and IL-17A) and anti-inflammatory cytokine (IL-10). STAT1 expression was downregulated by transfection with si-STAT1, and its expression was detected using quantitative real-time polymerase chain reaction and Western blot. Western blot was also performed to assess the expression of the mitogen-activated protein kinase (MAPK) pathway–related factors. In this article, TNF-α was highly expressed in patients with myocarditis, and TNF-α (20 μg/mL) declined the viability of H9c2 cells. Quercetin pretreatment partially alleviated the decrease of cell viability, the increase of apoptosis, and the release of inflammatory cytokines (IL-10, IL-6, and IL-17A) induced by TNF-α. In addition, TNF-α increased STAT1 expression, but quercetin prevented the TNF-α-increased STAT1 level. Remarkably, knockdown of STAT1 enhanced the protective effect of quercetin on TNF-α-injured H9c2 cells. Moreover, quercetin restrained the TNF-α-induced activation of the MAPK pathway. Also, the inhibitory effect of quercetin on the pathway was aggravated by STAT1 lacking. In summing, quercetin plays a protective role in TNF-α-stimulated H9c2 cell injury, which may be related to the regulation of STAT1 and MAPK pathway.