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result(s) for
"Xiao, Yingbin"
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Sirt1 promotes autophagy and inhibits apoptosis to protect cardiomyocytes from hypoxic stress
by
Tang, Fuqin
,
Luo, Guiping
,
Jian, Zhao
in
Adenoviruses
,
Advertising executives
,
AMP-activated protein kinase
2019
Sirtuin 1 (Sirt1) exerts its cardioprotective effects in various cardiovascular diseases via multiple cellular activities. However, the therapeutic implications of Sirt1 in hypoxic cardiomyocytes and the underlying mechanisms remain elusive. The present study investigated whether Sirt1 regulates autophagy and apoptosis in hypoxic H9C2 cardiomyocytes and in an experimental hypoxic mouse model. Right ventricular outflow tract biopsies were obtained from patients with cyanotic or acyanotic congenital heart diseases. Adenovirus Ad-Sirt1 was used to activate Sirt1 and Ad-Sh-Sirt1 was used to inhibit Sirt1 expression in H9C2 cells, in order to investigate the effect of Sirt1 on cellular autophagy and apoptosis. SRT1720, a pharmacological activator of Sirt1 and EX-527, a Sirt1 antagonist, were administered to mice to explore the role of Sirt1 in hypoxic cardiomyocytes in vivo. The levels of autophagy and apoptosis-related proteins were evaluated using western blotting. Apoptosis was investigated by TUNEL staining and Annexin V/7-aminoactinomycin D flow cytometry analysis. Heart tissue samples from cyanotic patients exhibited increased autophagy and apoptosis, as well as elevated Sirt1 levels, compared with the noncyanotic control samples. The data from the western blot analysis revealed that Sirt1 promoted autophagic flux and reduced apoptosis in hypoxic H9C2 cells. In addition, Sirt1 activated AMP-activated protein kinase (AMPK), and the AMPK inhibitor Compound C abolished the effect of Sirt1 on autophagy activation. Further exploration of the mechanism revealed that Sirt1 protects hypoxic cardiomyocytes from apoptosis, at least in part, through inositol requiring kinase enzyme 1α (IRE1α). Consistent with the in vitro results, treatment with the Sirt1 activator SRT1720 activated AMPK, inhibited IRE1α, enhanced autophagy, and decreased apoptosis in the heart tissues of normoxic mice compared with the hypoxia control group. Opposite changes were observed in hypoxic mice treated with the Sirt1 inhibitor EX-527. These results suggested that Sirt1 promoted autophagy via AMPK activation and reduced hypoxia-induced apoptosis via the IRE1α pathway, to protect cardiomyocytes from hypoxic stress.
Journal Article
Apigenin protects against ischemia-/hypoxia-induced myocardial injury by mediating pyroptosis and apoptosis
2020
Apigenin is a traditional Chinese medicine found in many plants that plays critical roles in several diseases, including cardiovascular diseases. We investigated the protective effect of apigenin against ischemia/hypoxia (I/H)-induced myocardium injury in vitro and explored the potential molecular mechanisms. Together with the flow cytometry results, our results indicated that apigenin attenuated the pyroptosis and apoptosis of myoblastic H9c2 cells that were induced by I/H injury. Furthermore, the proinflammatory cytokines (interleukin 18, IL-18, and IL-1β) were investigated for the roles of apigenin in I/H-induced myocardium injury. It was observed that increases in IL-1β and IL-18 levels were significantly reduced by apigenin treatment of I/H-induced H9C2 cells. The results demonstrated that apigenin protected H9c2 cells against I/H-induced myocardium injury. The protective effects were most likely related to the reduction of pyroptosis, apoptosis, and pro-inflammatory cytokines.
Journal Article
Expert consensus on the use of human serum albumin in adult cardiac surgery
2023
Harm Benefit
Journal Article
Clinical application and management of temporary mechanical circulatory support: A clinical consensus
by
Nianguo Dong
,
Liangwan Chen
,
Xianqiang Wang
in
Asian people
,
Cardiac function
,
Clinical outcomes
2024
[...]the IABP has the potential to elevate cardiac output by 10%–20% above baseline levels. The diagnosis hinges on the presence of persistent hypotension (systolic blood pressure <90 mmHg or mean arterial pressure [MAP] <65 mmHg), a cardiac index ≤2.2 L·min–1·m–2, pulmonary capillary wedge pressure ≥15 mmHg, and indicators of end-organ hypoperfusion (e.g., urine output <30 mL/h, altered mental status, cool extremities, lactate >2.0 mmol/L). (5) tMCS can be applied as a bridging therapy for subsequent decision-making in the management of CS occurring in end-stage HF. tMCS Preoperative Evaluation and Device Selection Forming a team Recommendation It is recommended to form a multidisciplinary tMCS team including physicians specializing in cardiovascular surgery, cardiovascular medicine, intensive care medicine, respiratory medicine, anesthesiology, extracorporeal circulation, ultrasound imaging, and other relevant fields, along with nursing and engineering personnel,[3] who are primarily responsible for determining the timing of tMCS placement, selecting the appropriate device, involving in preoperative preparation, device operation and management, and addressing potential complications. Preoperative assessment and timing Recommendations (1) Comprehensive evaluation of tMCS implantation, including indications, contraindications, timing of implantation, and cost-effectiveness, should be conducted by the multidisciplinary tMCS team.
Journal Article
Serum Diamine Oxidase as a Hemorrhagic Shock Biomarker in a Rabbit Model
by
Jia, Weikun
,
Zhao, Liang
,
Li, Jingwei
in
Amine Oxidase (Copper-Containing) - blood
,
Animals
,
Bioindicators
2014
In prolonged hemorrhagic shock, reductions in intestinal mucosal blood perfusion lead to mucosal barrier damage and systemic inflammation. Gastrointestinal failure in critically ill patients has a poor prognosis, so early assessment of mucosal barrier injury in shock patients is clinically relevant. Unfortunately, there is no serum marker that can accurately assess intestinal ischemia-reperfusion injury.
The aim of this study was to assess if serum diamine oxidase levels can reflect intestinal mucosal injury subsequent to prolonged hemorrhagic shock.
Thirty New Zealand white rabbits were divided into three groups: a control group, a medium blood pressure (BP) group (exsanguinated to a shock BP of 50 to 41 mm Hg), and a low BP group (exsanguinated to a shock blood pressure of 40 to 31 mm Hg), in which the shock BP was sustained for 180 min prior to fluid resuscitation.
The severity of hemorrhagic shock in the low BP group was significantly greater than that of the medium BP group according to the post-resuscitation BP, serum tumor necrosis factor (TNF)-α, and arterial lactate. Intestinal damage was significantly more severe in the low BP group according to Chiu's scoring, claudin-1, intercellular adhesion molecule (ICAM)-1, and myeloperoxidase expression. Serum diamine oxidase was significantly increased in the low BP group compared to the medium BP and control groups and was negatively correlated with shock BP.
Serum diamine oxidase can be used as a serological marker in evaluating intestinal injury and shows promise as an indicator of hemorrhagic shock severity.
Journal Article
Transcriptional profile of human thymus reveals IGFBP5 is correlated with age-related thymic involution
2024
Thymus is the main immune organ which is responsible for the production of self-tolerant and functional T cells, but it shrinks rapidly with age after birth. Although studies have researched thymus development and involution in mouse, the critical regulators that arise with age in human thymus remain unclear. We collected public human single-cell transcriptomic sequencing (scRNA-seq) datasets containing 350,678 cells from 36 samples, integrated them as a cell atlas of human thymus. Clinical samples were collected and experiments were performed for validation. We found early thymocyte-specific signaling and regulons which played roles in thymocyte migration, proliferation, apoptosis and differentiation. Nevertheless, signaling patterns including number, strength and path completely changed during aging, Transcription factors (FOXC1, MXI1, KLF9, NFIL3) and their target gene, IGFBP5, were resolved and up-regulated in aging thymus and involved in promoting epithelial-mesenchymal transition (EMT), responding to steroid and adipogenesis process of thymic epithelial cell (TECs). Furthermore, we validated that IGFBP5 protein increased at TECs and Hassall’s corpuscle in both human and mouse aging thymus and knockdown of IGFBP5 significantly increased the expression of proliferation-related genes in thymocytes. Collectively, we systematically explored cell-cell communications and regulons of early thymocytes as well as age-related differences in human thymus by using both bioinformatic and experimental verification, indicating IGFBP5 as a functional marker of thymic involution and providing new insights into the mechanisms of thymus involution.
Journal Article
Acute Type A Aortic Dissection and Late Pregnancy: What Should We Do?
2023
Acute type A aortic dissection (AAAD) in late pregnancy is a rare but severe disease. Lack of clinical experience is the main cause of high mortality. This study tries to investigate the multidisciplinary therapeutic strategy for these patients.
We reported three patients with AAAD in late pregnancy. Sudden chest pain was the main clinical symptom before operation. All three patients and their newborns survived through multidisciplinary approach in diagnosis and treatment. No serious complications occurred during the mid-term follow-up.
Multidisciplinary diagnosis and treatment strategy play a crucial role in saving the lives of pregnant women with AAAD.
Journal Article
Effect of the Urinary Tryptin Inhibitor Ulinastatin on Cardiopulmonary Bypass–Related Inflammatory Response and Clinical Outcomes: A Meta-Analysis of Randomized Controlled Trials
by
Xu, Rufu
,
He, Siyi
,
Xiao, Yingbin
in
cardioprotection
,
cardiopulmonary bypass
,
Cardiopulmonary Bypass - adverse effects
2015
Cardiopulmonary bypass (CPB) can cause systemic inflammatory responses and a series of subsequent complications that may harm patients. The aim of this study was to explore the effects of ulinastatin on inflammatory responses and clinical outcomes of CPB via a meta-analysis of published randomized controlled trials.
A literature search was conducted, both manually and by using the PubMed, EMBASE, Cochrane Library, and Web of Knowledge databases from inception to February 2013, to identify randomized controlled trials. The abstracted efficacy measures included changes in the plasma levels of cytokines (interleukin-6 [IL-6], IL-8, and tumor necrosis factor-α [TNF-α]) measured during the perioperative period and clinical indicators of efficacy, including the duration of mechanical ventilation and the length of intensive care unit stay. Ten ulinastatin-related randomized controlled trials related to cardiac surgeries involving CPB were selected.
In terms of cytokine concentrations, there were no significant differences between patients who received ulinastatin and those who received placebo before CPB. However, as the surgeries progressed, cytokine concentrations were all significantly lower in the ulinastatin group (P < 0.05 at 1 hour; P < 0.0001 at 6 hours), and the respective plasma concentrations returned to baseline values 24 hours after CPB. In terms of the clinical outcome indices, the length of intensive care unit stay was not significantly different, but the duration of mechanical ventilation (95% CI, –6.75 to –0.39; P = 0.03) was significantly shorter in the ulinastatin group.
This meta-analysis found that changes in inflammatory cytokines occurred in a time-dependent manner and that the use of ulinastatin resulted in decreased duration of mechanical ventilation with CPB compared with placebo.
Journal Article
Surgical treatment of primary cardiac valve tumor: early and late results in eight patients
2016
Background
To report early and late outcomes of patients with the primary cardiac valve tumor undergoing surgical treatment over a 30-year period in our cardiovascular center.
Methods
From January 1980 to December 2014, a total of 211 patients with primary cardiac tumors accepted surgical treatments, of which only 8 (3.8 %) were primary cardiac valve tumor patients in our surgical center of cardiovascular.
Results
The diagnosis was identified by echocardiography preoperatively and pathological analysis postoperatively. All patients underwent intracardiac procedures with extracorporeal circulation. Intracardiac procedures included resection of tumor on leaflet in 2 patients (25 %), resection of tumor and native valvuloplasty in 2 patients (25 %), resection of neoplasm and replacement of native valve with prosthetic valve in 4 patients (50 %). One man was performed a resection of tumor on aortic noncoronary leaflet and a coronary artery bypass graft. Eight cases of primary valve tumor occured in all of four cardiac valves. The majority of valvular tumor was myxoma in 3 cases (37.5 %), followed by the papillary fibroelastomas in 2 cases (25 %). There were one rhabdomyoma (12.5 %), one lipoma (12.5 %) and one mild malignant sarcoma (12.5 %). The mitral valve was the most commonly original valve (62.5 %). There was pulmonic (12.5 %), aortic (12.5 %) and tricuspid (12.5 %) valve tumor each one patient. There was no death and recrudescence in the series. Follow-up of all patients ranged from 1 to 16 years (mean 7.06±4.24 years). There was no recrudesce and cardiac valve dysfunction.
Conclusion
The incidence of primary valve tumor was very low. More understanding of the rare disease and widespread use of echocardiography would greatly improve the diagnosis of primary valve tumor in the early stage. Echocardiography could detect millimeters in diameter neoplasms on cardiac valve. The diagnoses were based on imaging findings and the classical triad symptoms associated with the hemodynamic abnormalities, the organ embolism and the systemic symptoms directly from tumors. The intraoperative frozen sections and postoperative pathology analysis provided accurate diagnosis and supported the treatment strategies. Early diagnosis and intervention were keys to reserve the normal original valve function. Prompt surgical resection is necessary to prevent potential critical events.
Journal Article
French Banks amid the Global Financial Crisis
2011
This paper runs the gamut of qualitative and quantitative analyses to examine the performance of French banks during 2006-2008 and the financial support measures taken by the French government. French banks were not immune but proved relatively resilient to the global financial crisis reflecting their business and supervisory features. An event study of the impact of government measures on CDS, debt, and equity markets points to the reduction of credit risk and financing cost as well as the redistribution of resources. With the crisis still unfolding, uncertainties remain and challenges lie ahead, calling for continued vigilance and enhanced risk management.
Journal Article
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