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Zhou W, Kang S, Wang F, Qin Y, Liu J, Xiao X, Chen X, Zhang D. Chromofungin, a chromogranin A-derived peptide, protects against sepsis-induced acute lung injury by inhibiting LBP/TLR4-dependent inflammatory signaling. Eur J Pharmacol 2023; 958:176043. [PMID: 37704044 DOI: 10.1016/j.ejphar.2023.176043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/15/2023]
Abstract
Chromofungin (CHR) is a biologically active peptide derived from chromogranin A that exhibits anti-inflammatory effects. However, it remains unclear whether and how CHR protects against sepsis-induced acute lung injury (ALI). A murine model of sepsis-induced ALI was established through cecal ligation and puncture, with intraperitoneal injection of CHR. Lung inflammation and macrophage polarization were examined by measuring the levels of cytokines and markers of M1 (CD86, inducible nitric oxide synthase [iNOS]) or M2 macrophages (arginase-1 [Arg1], resistin-like molecule α1 [Fizz1] and CD206). In vitro, mouse MH-S cells pretreated with CHR was employed to explore the interplay between the lipopolysaccharide-binding protein (LBP)/toll-like receptor 4 (TLR4) signaling pathway and M1/M2 polarity. The results revealed CHR's ability to enhance the 7-day survival rate and protect lung pathological injury in sepsis-induced ALI. CHR increased the expression of interleukin-4 and interleukin-10 but decreased the expression of tumour necrosis factor-α and interleukin-1β. In addition, CHR notably facilitated M2 macrophage polarization, while significantly suppressingM1 polarization of alveolar macrophages. Mechanistic investigations delineated CHR's role in macrophage polarization by downregulating nuclear factor-κB expression through modulation of the LBP/TLR4 signaling pathway. Therefore, CHR may represent a novel strategy for the prevention of sepsis-induced ALI.
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Affiliation(s)
- Wushuang Zhou
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Shengnan Kang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Fenglin Wang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Yupin Qin
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Jinglun Liu
- Department of Surgical Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Xiaoqiu Xiao
- The Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Xiaoying Chen
- Department of Surgical Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - Dan Zhang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
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The Molecular Heterogeneity of Store-Operated Ca 2+ Entry in Vascular Endothelial Cells: The Different roles of Orai1 and TRPC1/TRPC4 Channels in the Transition from Ca 2+-Selective to Non-Selective Cation Currents. Int J Mol Sci 2023; 24:ijms24043259. [PMID: 36834672 PMCID: PMC9967124 DOI: 10.3390/ijms24043259] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/31/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023] Open
Abstract
Store-operated Ca2+ entry (SOCE) is activated in response to the inositol-1,4,5-trisphosphate (InsP3)-dependent depletion of the endoplasmic reticulum (ER) Ca2+ store and represents a ubiquitous mode of Ca2+ influx. In vascular endothelial cells, SOCE regulates a plethora of functions that maintain cardiovascular homeostasis, such as angiogenesis, vascular tone, vascular permeability, platelet aggregation, and monocyte adhesion. The molecular mechanisms responsible for SOCE activation in vascular endothelial cells have engendered a long-lasting controversy. Traditionally, it has been assumed that the endothelial SOCE is mediated by two distinct ion channel signalplexes, i.e., STIM1/Orai1 and STIM1/Transient Receptor Potential Canonical 1(TRPC1)/TRPC4. However, recent evidence has shown that Orai1 can assemble with TRPC1 and TRPC4 to form a non-selective cation channel with intermediate electrophysiological features. Herein, we aim at bringing order to the distinct mechanisms that mediate endothelial SOCE in the vascular tree from multiple species (e.g., human, mouse, rat, and bovine). We propose that three distinct currents can mediate SOCE in vascular endothelial cells: (1) the Ca2+-selective Ca2+-release activated Ca2+ current (ICRAC), which is mediated by STIM1 and Orai1; (2) the store-operated non-selective current (ISOC), which is mediated by STIM1, TRPC1, and TRPC4; and (3) the moderately Ca2+-selective, ICRAC-like current, which is mediated by STIM1, TRPC1, TRPC4, and Orai1.
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PLD2 deletion alleviates disruption of tight junctions in sepsis-induced ALI by regulating PA/STAT3 phosphorylation pathway. Int Immunopharmacol 2023; 114:109561. [PMID: 36700766 DOI: 10.1016/j.intimp.2022.109561] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Increased inflammatory exudation caused by endothelium and endothelial junction damage is a typical pathological feature of acute respiratory distress syndrome/acute lung injury (ARDS/ALI). Previous studies have shown that phospholipase D2 (PLD2) can increase the inflammatory response and has a close relationship with the severity of sepsis-induced ALI and the mortality of sepsis, but its mechanism is unknown. This study explored the effect and mechanism of PLD2 deletion on the structure and function of endothelial tight junction (TJ) in lipopolysaccharide (LPS)-induced ALI. METHODS We used C57BL/6 mice (wild-type and PLD2 knockout (PLD2-/-)) and human umbilical vein endothelial cell (HUVEC) models of sepsis-ALI. The pathological changes were evaluated by hematoxylin-eosin staining. Pulmonary vascular permeability was detected using wet-dry ratio, fluorescein isothiocyanate (FITC)-dextran, FITC-albumin, and immunoglobulin M concentration of bronchoalveolar lavage fluid. FITC-dextran and trans-endothelial electrical resistance assay were used to evaluate endothelial permeability on LPS-stimulated HUVECs. The mRNA expressions of TJ proteins were detected by real-time quantitative polymerase chain reaction. Then, protein levels were detected through Western blot analysis and immunofluorescence. The content of phosphatidic acid (PA), a downstream product of PLD2, was detected using an enzyme-linked immunosorbent assay kit. RESULTS PLD2 deficiency not only alleviated lung histopathological changes and improved pulmonary vascular permeability but also increased the survival rate of ALI mice. Knockout of PLD2 or treatment with the PLD2 inhibitor can reduce the damage of endothelial TJ proteins, namely, claudin5, occludin and zonula occludens protein-1, in sepsis-ALI mice and LPS-stimulated HUVECs. The level of the PLD2 catalytic product PA increased in LPS-stimulated HUVECs, and exogenous PA can reduce the TJ protein expression and increase signal transducer and activator of transcription 3 (STAT3) phosphorylation in vitro. Inhibition of STAT3 phosphorylation attenuated PA-induced degradation of endothelial TJs. CONCLUSION PLD2 knockout or inhibition may protect against LPS-induced lung injury by regulating the PA/STAT3 phosphorylation/endothelial TJ axis.
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Niu M, Zhao F, Chen R, Li P, Bi L. The transient receptor potential channels in rheumatoid arthritis: Need to pay more attention. Front Immunol 2023; 14:1127277. [PMID: 36926330 PMCID: PMC10013686 DOI: 10.3389/fimmu.2023.1127277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 02/06/2023] [Indexed: 03/06/2023] Open
Abstract
Rheumatoid arthritis (RA) is characterized by the augment of vascular permeability, increased inflammatory cells infiltration, dysregulated immune cells activation, pannus formation and unbearable pain hyperalgesia. Ca2+ affect almost every aspect of cellular functions, involving cell migration, signal transduction, proliferation, and apoptosis. Transient receptor potential channels (TRPs) as a type of non-selective permeable cation channels, can regulate Ca2+ entry and intracellular Ca2+ signal in cells including immune cells and neurons. Researches have demonstrated that TRPs in the mechanisms of inflammatory diseases have achieved rapid progress, while the roles of TRPs in RA pathogenesis and pain hyperalgesia are still not well understood. To solve this problem, this review presents the evidence of TRPs on vascular endothelial cells in joint swelling, neutrophils activation and their trans-endothelial migration, as well as their bridging role in the reactive oxygen species/TRPs/Ca2+/peptidyl arginine deiminases networks in accelerating citrullinated proteins formation. It also points out the distinct functions of TRPs subfamilies expressed in the nervous systems of joints in cold hyperalgesia and neuro-inflammation mutually influenced inflammatory pain in RA. Thus, more attention could be paid on the impact of TRPs in RA and TRPs are useful in researches on the molecular mechanisms of anti-inflammation and analgesic therapeutic strategies.
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Affiliation(s)
- Mengwen Niu
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Feng Zhao
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Rui Chen
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Ping Li
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Liqi Bi
- Department of Rheumatology and Immunology, China-Japan Union Hospital of Jilin University, Changchun, China
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Wang F, Zeng Y, Liu X, Cao J, Kang S, Zhou W, Chen X, Liu J, Zhang D. Chromogranin A-derived peptide CGA47-66 protects against septic brain injury by reducing blood-brain barrier damage through the PI3K/AKT pathway. Biochem Biophys Res Commun 2022; 605:162-170. [PMID: 35339012 DOI: 10.1016/j.bbrc.2022.03.046] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/08/2022] [Indexed: 11/02/2022]
Abstract
CGA47-66 (Chromofungin, CHR), is a peptide derived from the N-terminus of chromogranin A (CgA), has been proven to inhibit the lipopolysaccharide (LPS)-induced brain injury. However, the underlying mechanism is still unknown. We found that CGA47-66 exerted a protective effect on cognitive impairment by inhibiting the destruction of the blood-brain barrier (BBB) in the LPS-induced sepsis mice model. In addition, the hCMEC/D3 cell line was used to establish an in vitro BBB model. Under LPS stimulation, CGA47-66 could significantly alleviate the hyperpermeability of the BBB, the destruction of tight junction proteins, and the rearrangement of F-actin. To investigate the underlying mechanism, we used LY294002, a PI3K inhibitor, which partially reduced the protective effect of CGA47-66 on the integrity of BBB. Indicating that the PI3K/AKT pathway plays a vital role in the brain-protective function of CGA47-66, which might be a potential therapeutic target for septic brain injury.
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Affiliation(s)
- FengLin Wang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - Yan Zeng
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China; Intensive Care Unit, Chongqing University Central Hospital, Chongqing, 400016, PR China.
| | - Xian Liu
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - JiaJun Cao
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - ShengNan Kang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - WuShuang Zhou
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - XiaoYing Chen
- Department of Surgical Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - JingLun Liu
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - Dan Zhang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
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The Emerging Roles of Chromogranins and Derived Polypeptides in Atherosclerosis, Diabetes, and Coronary Heart Disease. Int J Mol Sci 2021; 22:ijms22116118. [PMID: 34204153 PMCID: PMC8201018 DOI: 10.3390/ijms22116118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 02/07/2023] Open
Abstract
Chromogranin A (CgA), B (CgB), and C (CgC), the family members of the granin glycoproteins, are associated with diabetes. These proteins are abundantly expressed in neurons, endocrine, and neuroendocrine cells. They are also present in other areas of the body. Patients with diabetic retinopathy have higher levels of CgA, CgB, and CgC in the vitreous humor. In addition, type 1 diabetic patients have high CgA and low CgB levels in the circulating blood. Plasma CgA levels are increased in patients with hypertension, coronary heart disease, and heart failure. CgA is the precursor to several functional peptides, including catestatin, vasostatin-1, vasostatin-2, pancreastatin, chromofungin, and many others. Catestatin, vasostain-1, and vasostatin-2 suppress the expression of vascular cell adhesion molecule-1 and intercellular adhesion molecule-1 in human vascular endothelial cells. Catestatin and vasostatin-1 suppress oxidized low-density lipoprotein-induced foam cell formation in human macrophages. Catestatin and vasostatin-2, but not vasostatin-1, suppress the proliferation and these three peptides suppress the migration in human vascular smooth muscles. Chronic infusion of catestatin, vasostatin-1, or vasostatin-2 suppresses the development of atherosclerosis of the aorta in apolipoprotein E-deficient mice. Catestatin, vasostatin-1, vasostatin-2, and chromofungin protect ischemia/reperfusion-induced myocardial dysfunction in rats. Since pancreastatin inhibits insulin secretion from pancreatic β-cells, and regulates glucose metabolism in liver and adipose tissues, pancreastatin inhibitor peptide-8 (PSTi8) improves insulin resistance and glucose homeostasis. Catestatin stimulates therapeutic angiogenesis in the mouse hind limb ischemia model. Gene therapy with secretoneurin, a CgC-derived peptide, stimulates postischemic neovascularization in apolipoprotein E-deficient mice and streptozotocin-induced diabetic mice, and improves diabetic neuropathy in db/db mice. Therefore, CgA is a biomarker for atherosclerosis, diabetes, hypertension, and coronary heart disease. CgA- and CgC--derived polypeptides provide the therapeutic target for atherosclerosis and ischemia-induced tissue damages. PSTi8 is useful in the treatment of diabetes.
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Lin L, Wang Q, Xu F, Luo X, Xu J, Yan L, Li Q, Hao H. BML-111, the lipoxin A 4 agonist, modulates VEGF or CoCl 2-induced migration, angiogenesis and permeability in tumor-derived endothelial cells. Immunol Lett 2020; 230:27-35. [PMID: 33347917 DOI: 10.1016/j.imlet.2020.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 01/14/2023]
Abstract
Tumor angiogenesis plays a vital role in carcinogenesis, cancer progression, and metastasis. Lipoxin A4 (LXA4) is an endogenously-produced family of effective anti-inflammatory with a potent inhibitory effect on angiogenesis. However, BML-111, a LXA4 agonist, its governing tumor-derived endothelial cells (Td-EC) mechanisms remain unknown. In the present study, we utilized VEGF or CoCl2 to mimic tumor microenvironment in vitro to study the effect of BML-111 on angiogenesis and permeability of Td-EC, and preliminarily explore its specific mechanism. Data suggested that BML-111 inhibited viability, migration and angiogenesis in VEGF or CoCl2-treated Td-EC by modulating MMP2/9-TIMP1, and decreasing the production of HIF-1α and COX-2 level. In addition, we observed that BML-111 inhibited Td-EC permeability induced by VEGF or CoCl2, through the stabilization of VE-cadherin/β-catenin-dependent adherens junctions and TRPC1 pathway. Nevertheless, these effects could be blocked by BOC-2 which was the specific inhibitor of FPR2/ALX (the receptor of LXA4).These results suggest that BML-111 may have inhibitory effects on VEGF or CoCl2-induced migration, angiogenesis and permeability in tumor-derived endothelial cells.
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Affiliation(s)
- Lan Lin
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Qingyu Wang
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Fen Xu
- Department of General Medicine, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Xuliang Luo
- Department of Breast Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Jing Xu
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Liping Yan
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Qing Li
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China
| | - Hua Hao
- Department of Pathology, Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, PR China.
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