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Zhao X, Tian J, Liu Y, Ye Z, Xu M, Huang R, Song X. TLR4-Myd88 pathway upregulated caveolin-1 expression contributes to coronary artery spasm. Vascul Pharmacol 2021; 142:106947. [PMID: 34822994 DOI: 10.1016/j.vph.2021.106947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/14/2021] [Accepted: 11/17/2021] [Indexed: 11/30/2022]
Abstract
AIM To study the role of toll-like receptors 4-myeloid differentiation factor 88 (TLR4-Myd88) dependent caveolin-1 (Cav-1) expression modulation in coronary artery spasm (CAS) and explore the underlying pathogenic mechanisms. METHODS AND RESULTS Lipopolysaccharide (LPS) and acetylcholine (Ach) were used to develop the in vitro and in vivo models mimicking the physiological CAS microenvironment. LPS-induced upregulation of Cav-1 expression in mouse coronary and aorta endothelial cells was shown by western blot and immunofluorescence (IF) staining (p < 0.01). Caveolin-1-knockout (Cav-1-/-) mice had reduced aortic inflammation after LPS challenge, and fewer ST segment changes were observed through electrocardiogram (ECG) monitoring compared to wild type mice after LPS and ACh administration. In vitro, pretreating human umbilical vein endothelial cells (HUVECs) with siCav-1 to knock down Cav-1 expression reduced the endothelial inflammation following LPS challenge. SiCav-1 also partially reversed the attenuated Ca2+ concentration after LPS and ACh administration compared to the control group, which was evaluated by fluorescent molecular probing for Ca2+ alternation monitoring (p < 0.05). TLR4 and Myd88 downregulation by siRNA partially blocked the increased Cav-1 mRNA and protein expressions following LPS treatment, as well as partially reversed the decreased NO production evaluated by nitrate reductase method and the impaired Ca2+ concentration of endothelial cells induced by LPS and ACh. CONCLUSION These findings suggested that Cav-1, which was upregulated by TLR4-Myd88, served as an important modulator of CAS microenvironment establishment in vivo and in vitro, making it a potential pharmacologic target for the treatment of vasospasm via reduced endothelial cell inflammation.
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Affiliation(s)
- Xin Zhao
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, 2 Anzhen Road, Beijing 100029, PR China
| | - Jinfan Tian
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, 2 Anzhen Road, Beijing 100029, PR China
| | - Yue Liu
- Cardiovascular Disease Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zhishuai Ye
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, 95th Yong An Road, Xuan Wu District, Beijing 100050, PR China
| | - Mingyue Xu
- Department of Geriatrics, Beijing Friendship Hospital, Capital Medical University, 95th Yong An Road, Xuan Wu District, Beijing 100050, PR China
| | - Rongchong Huang
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, 95th Yong An Road, Xuan Wu District, Beijing 100050, PR China.
| | - Xiantao Song
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, 2 Anzhen Road, Beijing 100029, PR China.
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Enhanced Endothelin A and B Receptor Expression and Receptor-Mediated Vasoconstriction in Rat Mesenteric arteries after Lipopolysaccharide Challenge. Mediators Inflamm 2019; 2019:6248197. [PMID: 31827377 PMCID: PMC6881566 DOI: 10.1155/2019/6248197] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 10/10/2019] [Indexed: 01/08/2023] Open
Abstract
During organ culture of intact vessels, endothelin receptors (ETRs) were upregulated in vascular smooth muscle cells (VSMCs) by various stimuli, but whether inflammation alters ETR expression in vivo remains unclear. We aimed to explore the effects of lipopolysaccharide (LPS) challenge on ETR expression in the VSMC in vivo. Male Sprague-Dawley rats received a single intraperitoneal injection of LPS (5 mg/kg body weight) or normal saline (NS) for 6 hrs. The function and expression of ETR type A (ETA) and type B (ETB) were evaluated in the mesenteric arteries without endothelium, by using myograph system, real-time quantitative PCR, Western blot, and immunohistochemical staining, respectively. Serum tumor necrosis factor-α (TNF-α) level was assessed by using enzyme-linked immunosorbent assay. The results showed that, compared to control (NS) group, LPS treatment potently enhanced the vasoconstriction mediated by ETA or ETB in rat mesenteric artery, with elevated maximum effects. ETA and ETB expressions in the VSMC were increased at both mRNA and protein levels after LPS treatment, paralleled with activation of the NF-κB pathway and augmented serum TNF-α level. Conclusively, in the rat model of immediate systemic inflammation induced by LPS, ETA and ETB expressions were increased in the mesenteric arterial VSMC, paralleled with enhanced receptor-mediated vasoconstriction and activation of the NF-κB pathway. Our data has for the first time demonstrated the upregulation of ETRs in VSMCs by LPS-induced immediate inflammation in vivo.
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C-Type Natriuretic Peptide Ameliorates Lipopolysaccharide-Induced Cardiac Dysfunction in Rats with Pulmonary Arterial Hypertension. BIOMED RESEARCH INTERNATIONAL 2018; 2018:2813025. [PMID: 30671449 PMCID: PMC6317089 DOI: 10.1155/2018/2813025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/30/2018] [Accepted: 11/21/2018] [Indexed: 11/18/2022]
Abstract
Lipopolysaccharide induces rapid deterioration of cardiac function in rats with pulmonary arterial hypertension. It was desired to investigate if this cardiac dysfunction could be treated by C-type natriuretic peptide. Rat pulmonary arterial hypertension was induced by intraperitoneal injection of monocrotaline. Hemodynamics and cardiac function were measured by pressure-volume (P-V) catheter before and after the rats were treated with lipopolysaccharide and C-type natriuretic peptide. Cyclic guanosine 3',5'-monophosphate (cGMP) level was determined by enzyme-linked immunosorbent assay analysis. After the rats were injected with low-dose lipopolysaccharide, they experienced left ventricle systolic function deterioration. Administration of C-type natriuretic peptide improved hemodynamics and left ventricle systolic function. cGMP level was elevated after C-type natriuretic peptide treatment. C-type natriuretic peptide could ameliorate lipopolysaccharide-induced cardiac dysfunction and restore hemodynamic deterioration in rats with pulmonary arterial hypertension.
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Weismann CG, Asnes JD, Bazzy-Asaad A, Tolomeo C, Ehrenkranz RA, Bizzarro MJ. Pulmonary hypertension in preterm infants: results of a prospective screening program. J Perinatol 2017; 37:572-577. [PMID: 28206997 DOI: 10.1038/jp.2016.255] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 11/02/2016] [Accepted: 12/13/2016] [Indexed: 01/03/2023]
Abstract
OBJECTIVE Determine prevalence and associations with pulmonary hypertension (PH) in preterm infants. STUDY DESIGN Prospective institutional echocardiographic PH screening at 36 to 38 weeks' corrected gestational age (GA) for infants born <32 weeks' GA who had bronchopulmonary dysplasia (BPD; group BPD), and infants without BPD who had a birth weight (BW) <750 g, or clinical suspicion for PH (group NoBPD). RESULTS Two hundred and four infants were screened (GA 25.9±2 weeks, BW 831±286 g). The PH prevalence in group BPD was higher than in group NoBPD (44/159 (28%) vs 5/45 (11%); P=0.028). In group BPD, BW and GA were lower in infants with PH compared with NoPH. Following correction for BW and GA, necrotizing enterocolitis (NEC), severe intraventricular hemorrhage (IVH), atrial septal defect (ASD), and mortality were independently associated with PH in infants with BPD. In group NoBPD, NEC was the only identified factor associated with PH. Altogether, screening only those infants with NEC and infants with BPD who also had a BW <840 g would have yielded a 84% sensitivity for detecting PH, and reduced the number of screening echocardiograms by 43%. CONCLUSIONS PH in prematurity is associated with NEC in infants with and without BPD. In infants with BPD, smaller GA and BW, severe IVH, ASD and mortality are also associated with PH. Infants without identified PH-associated factors may not require routine echocardiographic PH screening.
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Affiliation(s)
- C G Weismann
- Department of Pediatrics, Division of Pediatric Cardiology, Section of Pediatric Cardiology, Yale University School of Medicine, New Haven, CT, USA.,Pediatric Heart Center, Skåne Universitetssjukhus, Lasarettgatan 48, Lund, Sweden
| | - J D Asnes
- Department of Pediatrics, Division of Pediatric Cardiology, Section of Pediatric Cardiology, Yale University School of Medicine, New Haven, CT, USA
| | - A Bazzy-Asaad
- Department of Pediatrics, Section of Pediatric Respiratory Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - C Tolomeo
- Department of Pediatrics, Section of Pediatric Respiratory Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - R A Ehrenkranz
- Department of Pediatrics, Section of Neonatal-Perinatal Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - M J Bizzarro
- Department of Pediatrics, Section of Neonatal-Perinatal Medicine, Yale University School of Medicine, New Haven, CT, USA
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Sun P, Zhu K, Wang C, Liu WW, Peng DG, Zhao X. Prophylactic effects of alkaloids from Ba lotus seeds on L-NNA-induced hypertension in mice. Chin J Nat Med 2017; 14:835-843. [PMID: 27914527 DOI: 10.1016/s1875-5364(16)30100-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Indexed: 12/25/2022]
Abstract
Alkaloids from Ba lotus seeds (ABLS) are a kind of important functional compounds in lotus seeds. The present study was designed to determine its hypertension prophylactic effects in the L-NNA-induced mouse hypertension model. The mice were treated with ABLS, the serum and tissues levels of NO, MDA, ET-1, VEGF, and CGRP were determined using the experimental kits, the mRNA levels of various genes in the heart muscle and blood vessel tissues were further determined by RT-PCR assay. ABLS could reduce the systolic blood pressure (SBP), mean blood pressure (MBP), and diastolic blood pressure (DBP), compared to that of the model control group. After ABLS treatment, the NO (nitric oxide) contents in serum, heart, liver, kidney and stomach of the mice were higher than that of the control mice, but the MDA (malonaldehyde) contents were lower than that of the control mice. The serum levels of ET-1 (endothelin-1), VEGF (vascular endothelial growth factor) were decreased after ABLS treatment, but CGRP (calcium gene related peptide) level was increased. The ABLS treated mice had higher mRNA expressions of HO-1, nNOS, and eNOS and lower expressions of ADM, RAMP2, IL-1β, TNF-α, and iNOS than the control mice. Higher concentration of ABLS had greater prophylactic effects, which were close to that of the hypertension drug captopril. These results indicated the hypertension prophylactic effects of ABLS could be further explored as novel medicine or functional food in the future.
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Affiliation(s)
- Peng Sun
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; Chongqing Enterprise Engineering Research Center of Ba-lotus Breeding and Deep Processing, Chongqing 400041, China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China; Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing 400067, China; Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing 400067, China
| | - Kai Zhu
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China
| | - Cun Wang
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China
| | - Wei-Wei Liu
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - De-Guang Peng
- Chongqing Enterprise Engineering Research Center of Ba-lotus Breeding and Deep Processing, Chongqing 400041, China.
| | - Xin Zhao
- Chongqing Collaborative Innovation Center for Functional Food, Chongqing University of Education, Chongqing 400067, China; Chongqing Enterprise Engineering Research Center of Ba-lotus Breeding and Deep Processing, Chongqing 400041, China; Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China; Chongqing Engineering Research Center of Functional Food, Chongqing University of Education, Chongqing 400067, China; Chongqing Engineering Laboratory for Research and Development of Functional Food, Chongqing University of Education, Chongqing 400067, China.
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Fracasso T, Jentgens L, Pfeiffer H, Sauerland C, Mangin P, Schmeling A. Right heart ischemia in cases of sepsis. Forensic Sci Int 2016; 259:106-9. [DOI: 10.1016/j.forsciint.2015.12.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 09/30/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
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BQ123 Stimulates Skeletal Muscle Antioxidant Defense via Nrf2 Activation in LPS-Treated Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:2356853. [PMID: 26823945 PMCID: PMC4707360 DOI: 10.1155/2016/2356853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 09/24/2015] [Accepted: 10/11/2015] [Indexed: 01/02/2023]
Abstract
Little is understood of skeletal muscle tissue in terms of oxidative stress and inflammation. Endothelin-1 is an endogenous, vasoconstrictive peptide which can induce overproduction of reactive oxygen species and proinflammatory cytokines. The aim of this study was to evaluate whether BQ123, an endothelin-A receptor antagonist, influences the level of TNF-α, IL-6, SOD-1, HO-1, Nrf2 mRNA, and NF-κB subunit RelA/p65 mRNA in the femoral muscle obtained from endotoxemic rats. Male Wistar rats were divided into 4 groups (n = 6) and received iv (1) saline (control), (2) LPS (15 mg/kg), (3) BQ123 (1 mg/kg), (4) BQ123 (1 mg/kg), and LPS (15 mg/kg, resp.) 30 min later. Injection of LPS led to significant increase in levels of RelA/p65 mRNA, TNF-α, and IL-6, while content of SOD-1, HO-1, and Nrf2 mRNA was unchanged. Administration of BQ123 prior to LPS challenge resulted in a significant reduction in RelA/p65 mRNA, TNF-α, and IL-6 levels, as well as markedly elevated concentrations of SOD-1, HO-1, and Nrf2 mRNA. BQ123 appears to enhance antioxidant defense and prevent production of TNF-α and IL-6 in skeletal muscle of LPS-treated rat. In conclusion, endothelin-A receptor antagonism exerts significant impact on the skeletal muscle favouring anti-inflammatory effects and protection against oxidative stress.
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