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Zhang M, Cui R, Zhou Y, Ma Y, Jin Y, Gou X, Yang J, Wu X. Uric acid accumulation in the kidney triggers mast cell degranulation and aggravates renal oxidative stress. Toxicology 2023; 483:153387. [PMID: 36464070 DOI: 10.1016/j.tox.2022.153387] [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: 10/02/2022] [Revised: 11/17/2022] [Accepted: 11/27/2022] [Indexed: 12/02/2022]
Abstract
The accumulation of uric acid (UA) in the body can lead to the occurrence of hyperuricemia or uric acid nephropathy. Mast cells (MCs) increase oxidative stress and release renin to promote the production of Ang II. The aim of this study was to investigate the effect of UA on MCs in rat kidneys and the association between MCs and renal injury. Our results show that UA accumulation in the kidney stimulated the degranulation of MCs and the release of renin to promote Ang II production, resulting in renal oxidative stress, mitochondrial structural damage, and microvascular system damage. The expression of urate-related transporters was regulated by the UA level and serum urinary toxins levels were substantially elevated in hyperuricemia. Administration of the MCs membrane stabilizer sodium cromoglycate (SCG) or the angiotensin receptor antagonist Valsartan decreased the production of renin and Ang II and relieved renal oxidative stress, mitigated mitochondrial structural damage and microvascular system damage, and promoted the excretion of UA and urinary toxins by increasing the expression of urate-related transporters. These results demonstrate that the accumulation of UA in the kidney can trigger the degranulation of MCs and promote the development of renal oxidative stress. Administration of SCG and Valsartan ameliorated UA-induced renal injury by inhibiting MCs degranulation and reducing renal oxidative stress by inhibiting renin and Ang II production and accelerating renal clearance of UA and uremic toxins.
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Affiliation(s)
- Mingkang Zhang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Ruirui Cui
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Yan Zhou
- Department of Pharmacy, The First Hospital of Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Yanrong Ma
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Department of Pharmacy, The First Hospital of Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Yongwen Jin
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Department of Pharmacy, The First Hospital of Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Xueyan Gou
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Jinru Yang
- Department of Pharmacy, The First Hospital of Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China
| | - Xin'an Wu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China; Department of Pharmacy, The First Hospital of Lanzhou University, Lanzhou 730000, China; Engineering Research Centre of Prevention and Control for Clinical Medication Risk, Gansu Province, China.
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Menkü Özdemir FD, Üstün GG, Kősemehmetoğlu K, İspirli M, Boynuyoğun E, Uzun H. Comparison of Cromolyn Sodium, Montelukast, and Zafirlukast Prophylaxis for Capsular Contracture. Plast Reconstr Surg 2022; 150:1005e-1014e. [PMID: 35994348 DOI: 10.1097/prs.0000000000009653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Capsular contracture is the most common complication following breast augmentation. Recently, prophylaxis studies aiming to inhibit the release of profibrotic substances to prevent capsular contracture have gained in importance. This study investigated the effects of cromolyn sodium, montelukast, and zafirlukast on capsular contracture in a rat model. METHODS Thirty female Wistar albino rats were randomly divided into five groups: control, sham, cromolyn sodium, montelukast, and zafirlukast. Intraperitoneal injections were administered daily to the sham (1 ml per day), cromolyn sodium (10 mg/kg per day), montelukast (10 mg/kg per day), and zafirlukast (1.25 mg/kg per day) groups 1 month before surgery. Miniature breast implants were then placed on the backs of the rats in each group. Injections were continued for the next 3 months. The rats were subsequently killed, and the capsules were harvested and assessed histopathologically. The histopathologic outcomes were acute inflammation status, inflammation severity, synovial metaplasia, foreign body reaction, mast cell count, and capsular thickness. RESULTS The cromolyn sodium, montelukast, and zafirlukast groups had less acute inflammation and lower mean inflammation severity scores, foreign body reaction occurrence, mast cell counts, and capsular thickness than the control and sham groups ( p < 0.05). These parameters were better in the cromolyn sodium group than in the montelukast and zafirlukast groups ( p < 0.05). CONCLUSIONS Cromolyn sodium appears to inhibit capsular contracture more efficiently than montelukast and zafirlukast. This report may be a pioneer study for the prophylactic use of cromolyn sodium in capsular contracture. CLINICAL RELEVANCE STATEMENT The prophylactic administration of cromolyn sodium appears to reduce capsular contracture more efficiently than that of montelukast and zafirlukast. This report might constitute a pioneer study for the prophylactic use of cromolyn sodium in capsular contracture.
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Affiliation(s)
- Fethiye Damla Menkü Özdemir
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
| | - Galip Gencay Üstün
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
| | - Kemal Kősemehmetoğlu
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
| | - Mukaddes İspirli
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
| | - Etkin Boynuyoğun
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
| | - Hakan Uzun
- From the Departments of Plastic Reconstructive and Aesthetic Surgery, Pathology, and Pharmacology, Hacettepe University Faculty of Medicine
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Robarts DR, McGreal SR, Umbaugh DS, Parkes WS, Kotulkar M, Abernathy S, Lee N, Jaeschke H, Gunewardena S, Whelan SA, Hanover JA, Zachara NE, Slawson C, Apte U. Regulation of Liver Regeneration by Hepatocyte O-GlcNAcylation in Mice. Cell Mol Gastroenterol Hepatol 2022; 13:1510-1529. [PMID: 35093590 PMCID: PMC9043307 DOI: 10.1016/j.jcmgh.2022.01.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS The liver has a unique capacity to regenerate after injury in a highly orchestrated and regulated manner. Here, we report that O-GlcNAcylation, an intracellular post-translational modification regulated by 2 enzymes, O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA), is a critical termination signal for liver regeneration following partial hepatectomy (PHX). METHODS We studied liver regeneration after PHX on hepatocyte specific OGT and OGA knockout mice (OGT-KO and OGA-KO), which caused a significant decrease (OGT-KO) and increase (OGA-KO) in hepatic O-GlcNAcylation, respectively. RESULTS OGA-KO mice had normal regeneration, but the OGT-KO mice exhibited substantial defects in termination of liver regeneration with increased liver injury, sustained cell proliferation resulting in significant hepatomegaly, hepatic dysplasia, and appearance of small nodules at 28 days after PHX. This was accompanied by a sustained increase in expression of cyclins along with significant induction in pro-inflammatory and pro-fibrotic gene expression in the OGT-KO livers. RNA-sequencing studies revealed inactivation of hepatocyte nuclear 4 alpha (HNF4α), the master regulator of hepatic differentiation and a known termination signal, in OGT-KO mice at 28 days after PHX, which was confirmed by both Western blot and immunohistochemistry analysis. Furthermore, a significant decrease in HNFα target genes was observed in OGT-KO mice, indicating a lack of hepatocyte differentiation following decreased hepatic O-GlcNAcylation. Immunoprecipitation experiments revealed HNF4α is O-GlcNAcylated in normal differentiated hepatocytes. CONCLUSIONS These studies show that O-GlcNAcylation plays a critical role in the termination of liver regeneration via regulation of HNF4α in hepatocytes.
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Affiliation(s)
- Dakota R Robarts
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - Steven R McGreal
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - David S Umbaugh
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - Wendena S Parkes
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - Manasi Kotulkar
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - Sarah Abernathy
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | - Norman Lee
- Department of Chemistry, Boston University, Boston, Massachusetts
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas
| | | | - Stephen A Whelan
- Department of Chemistry, Boston University, Boston, Massachusetts
| | - John A Hanover
- Laboratory of Cell Biochemistry and Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Natasha E Zachara
- Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Chad Slawson
- Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, Kansas
| | - Udayan Apte
- Department of Pharmacology, Toxicology and Therapeutics, Kansas City, Kansas.
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Bae SJ, Ji JY, Oh JY, Won J, Ryu YH, Lee H, Jung HS, Park HJ. The Role of Skin Mast Cells in Acupuncture Induced Analgesia in Animals: A Preclinical Systematic Review and Meta-analysis. THE JOURNAL OF PAIN 2021; 22:1560-1577. [PMID: 34182104 DOI: 10.1016/j.jpain.2021.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 05/08/2021] [Accepted: 06/05/2021] [Indexed: 01/28/2023]
Abstract
While mast cells (MCs) are previously well-known as a pathological indicator of pain, their role in alleviating pain is recently emerged in acupuncture research. Thus, this study systematically reviews the role of MC in acupuncture analgesia. Animal studies on MC changes associated with the acupuncture analgesia were searched in PubMed and EMBASE. The MC number, degranulation ratio and pain threshold changes were collected as outcome measures for meta-analyses. Twenty studies were included with 13 suitable for meta-analysis, most with a moderate risk of bias. A significant MC degranulation after acupuncture was indicated in the normal and was significantly higher in the pain model. In the subgroup analysis by acupuncture type, manual (MA) and electrical (EA, each P < .00001) but not sham acupuncture had significant MC degranulation. Meta-regression revealed the linear proportionality between MC degranulation and acupuncture-induced analgesia (P < .001), which was found essential in MA (P < .00001), but not in EA (P = .45). MC mediators, such as adenosine and histamine, are involved in its mechanism. Taken together, skin MC is an essential factor for acupuncture-induced analgesia, which reveals a new aspect of MC as a pain alleviator. However, its molecular mechanism requires further study. PERSPECTIVE: This systematic review synthesizes data from studies that examined the contribution of skin MC in acupuncture analgesia. Current reports suggest a new role for skin MC and its mediators in pain alleviation and explain a peripheral mechanism of acupuncture analgesia, with suggesting the need of further studies to confirm these findings.
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Affiliation(s)
- Sun-Jeong Bae
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Jeong-Yeon Ji
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Ju-Young Oh
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Jiyoon Won
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yeon-Hee Ryu
- Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Hyangsook Lee
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hyuk-Sang Jung
- Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hi-Joon Park
- Acupuncture and Meridian Science Research Center (AMSRC), Kyung Hee University, Seoul, Republic of Korea; Department of Korean Medical Science, Graduate School of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Wang W, Pottorf TS, Wang HH, Dong R, Kavanaugh MA, Cornelius JT, Dennis KL, Apte U, Pritchard MT, Sharma M, Tran PV. IFT-A deficiency in juvenile mice impairs biliary development and exacerbates ADPKD liver disease. J Pathol 2021; 254:289-302. [PMID: 33900625 DOI: 10.1002/path.5685] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 04/16/2021] [Indexed: 02/06/2023]
Abstract
Polycystic liver disease (PLD) is characterized by the growth of numerous biliary cysts and presents in patients with autosomal dominant polycystic kidney disease (ADPKD), causing significant morbidity. Interestingly, deletion of intraflagellar transport-B (IFT-B) complex genes in adult mouse models of ADPKD attenuates the severity of PKD and PLD. Here we examine the role of deletion of an IFT-A gene, Thm1, in PLD of juvenile and adult Pkd2 conditional knockout mice. Perinatal deletion of Thm1 resulted in disorganized and expanded biliary regions, biliary fibrosis, increased serum bile acids, and a shortened primary cilium on cytokeratin 19+ (CK19+) epithelial cells. In contrast, perinatal deletion of Pkd2 caused PLD, with multiple CK19+ epithelial cell-lined cysts, fibrosis, lengthened primary cilia, and increased Notch and ERK signaling. Perinatal deletion of Thm1 in Pkd2 conditional knockout mice increased hepatomegaly, liver necrosis, as well as serum bilirubin and bile acid levels, indicating enhanced liver disease severity. In contrast to effects in the developing liver, deletion of Thm1 alone in adult mice did not cause a biliary phenotype. Combined deletion of Pkd2 and Thm1 caused variable hepatic cystogenesis at 4 months of age, but differences in hepatic cystogenesis between Pkd2- and Pkd2;Thm1 knockout mice were not observed by 6 months of age. Similar to juvenile PLD, Notch and ERK signaling were increased in adult Pkd2 conditional knockout cyst-lining epithelial cells. Taken together, Thm1 is required for biliary tract development, and proper biliary development restricts PLD severity. Unlike IFT-B genes, Thm1 does not markedly attenuate hepatic cystogenesis, suggesting differences in regulation of signaling and cystogenic processes in the liver by IFT-B and -A. Notably, increased Notch signaling in cyst-lining epithelial cells may indicate that aberrant activation of this pathway promotes hepatic cystogenesis, presenting as a novel potential therapeutic target. © 2021 The Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Wei Wang
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Tana S Pottorf
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Henry H Wang
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Ruochen Dong
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Matthew A Kavanaugh
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Joseph T Cornelius
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Katie L Dennis
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS, USA
| | - Udayan Apte
- Department of Pharmacology, Toxicology and Therapeutics, The Liver Center, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Michele T Pritchard
- Department of Pharmacology, Toxicology and Therapeutics, The Liver Center, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Madhulika Sharma
- Department of Internal Medicine, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
| | - Pamela V Tran
- Department of Anatomy and Cell Biology, The Jared Grantham Kidney Institute, University of Kansas Medical Center, Kansas City, KS, USA
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Development of Advanced Chemometric-Assisted Spectrophotometric Methods for the Determination of Cromolyn Sodium and Its Alkaline Degradation Products. Molecules 2020; 25:molecules25245953. [PMID: 33339114 PMCID: PMC7765536 DOI: 10.3390/molecules25245953] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/08/2020] [Accepted: 12/15/2020] [Indexed: 01/23/2023] Open
Abstract
Advanced and sensitive spectrophotometric and chemometric analytical methods were successfully established for the stability-indicating assay of cromolyn sodium (CS) and its alkaline degradation products (Deg1 and Deg2). Spectrophotometric mean centering ratio spectra method (MCR) and chemometric methods, including principal component regression (PCR) and partial least square (PLS-2) methods, were applied. Peak amplitudes after MCR at 367.8 nm, 373.8 nm and 310.6 nm were used within linear concentration ranges of 2-40 µg mL-1, 5-40 µg mL-1 and 10-100 µg mL-1 for CS, Deg1 and Deg2, respectively. For PCR and PLS-2 models, a calibration set of eighteen mixtures and a validation set of seven mixtures were built for the simultaneous determination of CS, Deg1 and Deg2 in the ranges of 5-13 µg mL-1, 8-16 µg mL-1, and 10-30 µg mL-1, respectively. The authors emphasize the importance of a stability-indicating strategy for the investigation of pharmaceutical products.
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Ghafouri Z, Seyyedian S, Nikbakht J, Kouhsari E, Bayat S, Zargar H, Houshmand G. Effect of Sodium Cromoglycate on Acetic Acid-induced Ulcerative Colitis in Mice. THE KOREAN JOURNAL OF GASTROENTEROLOGY 2020; 75:39-45. [PMID: 31986572 DOI: 10.4166/kjg.2020.75.1.39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 11/10/2019] [Accepted: 11/23/2019] [Indexed: 12/24/2022]
Abstract
Background/Aims Ulcerative colitis (UC) is a type of inflammatory bowel disease that mainly involves the colon. Thus far, glucocorticoids and amino-salicylate have been the main treatment. Methods To assess drugs with fewer side effects, this study evaluated the effects of sodium cromoglycate (SCG) on acetic acid-induced UC in rats. The treatment groups included SCG receivers (50 and 100 mg/kg, intra-orally) and sulfasalazine (SSZ) receivers (100 mg/kg, intra-orally). The colonic mucosal injury was assessed by clinical, macroscopic, and histopathological examinations. Results In the treatment groups with 50 and 100 mg/kg of SCG, the clinical activity score decreased to 2.67±0.18 and 1.73±0.21 (p<0.05), respectively, compared to the UC control group (3.21±0.31), and were higher than that of the group given the standard treatment of 100 mg/kg SSZ (1.10±0.09). The treatment groups with 50 and 100 mg/kg of SCG showed a lower clinical gross lesion score than the UC control group (2.91±0.28 and 2.10±0.43, vs. 4.49±0.61, p<0.05) and were higher than the standard group (0.95±0.18). Treatment with SCG (100 mg/kg) decreased the macroscopic scores significantly compared to the UC control group (p<0.05) on the 8th day. Conclusions SCG (100mg/kg) decreased significantly the clinical activity score, gross lesion, and percentage-affected area compared to the UC controls on the 8th day.
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Affiliation(s)
- Zahra Ghafouri
- Department of Biochemistry, Biophysics and Genetics, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Saeid Seyyedian
- Department of Internal Medicine, School of Medicine, Alimentary Tract Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Jafar Nikbakht
- Department of Pharmacology, School of Medicine, Yasuj University of Medical Science, Yasuj, Iran
| | - Ebrahim Kouhsari
- Clinical Microbiology Research Center, Ilam University of Medical Sciences, Ilam, Iran.,Laboratory Sciences Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Sara Bayat
- Department of Internal Medicine, School of Medicine, Alimentary Tract Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hamidreza Zargar
- Department of Pharmacology, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Gholamreza Houshmand
- Department of Pharmacology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.,Gut and Liver Research Center, Mazandaran University of Medical Sciences, Sari, Iran
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8
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Yu H, Liu Y, Wang M, Restrepo RJ, Wang D, Kalogeris TJ, Neumann WL, Ford DA, Korthuis RJ. Myeloperoxidase instigates proinflammatory responses in a cecal ligation and puncture rat model of sepsis. Am J Physiol Heart Circ Physiol 2020; 319:H705-H721. [PMID: 32762560 DOI: 10.1152/ajpheart.00440.2020] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Myeloperoxidase (MPO)-derived hypochlorous (HOCl) reacts with membrane plasmalogens to yield α-chlorofatty aldehydes such as 2-chlorofatty aldehyde (2-ClFALD) and its metabolite 2-chlorofatty acid (2-ClFA). Recent studies showed that 2-ClFALD and 2-ClFA serve as mediators of the inflammatory responses to sepsis by as yet unknown mechanisms. Since no scavenger for chlorinated lipids is available and on the basis of the well-established role of the MPO/HOCl/chlorinated lipid axis in inflammatory responses, we hypothesized that treatment with MPO inhibitors (N-acetyl lysyltyrosylcysteine amide or 4-aminobenzoic acid hydrazide) would inhibit inflammation and proinflammatory mediator expression induced by cecal ligation and puncture (CLP). We used intravital microscopy to quantify in vivo inflammatory responses in Sham and CLP rats with or without MPO inhibition. Small intestines, mesenteries, and lungs were collected to assess changes in MPO-positive staining and lung injury, respectively, as well as free 2-ClFA and proinflammatory mediators levels. CLP caused neutrophil infiltration, 2-ClFA generation, acute lung injury, leukocyte-/platelet-endothelium interactions, mast cell activation (MCA), plasminogen activator inhibitor-1 (PAI-1) production, and the expression of several cytokines, chemokines, and vascular endothelial growth factor, changes that were reduced by MPO inhibition. Pretreatment with a PAI-1 inhibitor or MC stabilizer prevented CLP-induced leukocyte-endothelium interactions and MCA, and abrogated exogenous 2-ClFALD-induced inflammatory responses. Thus, we provide evidence that MPO instigates these inflammatory changes in CLP and that chlorinated lipids may serve as a mechanistic link between the enzymatic activity of MPO and PAI-1- and mast cell-dependent adhesive interactions, providing a rationale for new therapeutic interventions in sepsis.NEW & NOTEWORTHY Using two distinct myeloperoxidase (MPO) inhibitors, we show for the first time that MPO plays an important role in producing increases in free 2-chlorofatty aldehyde (2-ClFALD)-a powerful proinflammatory chlorinated lipid in plasma and intestine-a number of cytokines and other inflammatory mediators, leukocyte and platelet rolling and adhesion in postcapillary venules, and lung injury in a cecal ligation and puncture model of sepsis. In addition, the use of a plasminogen activator inhibitor-1 (PAI-1) inhibitor or a mast cell stabilizer prevented inflammatory responses in CLP-induced sepsis. PAI-1 inhibition also prevented the proinflammatory responses to exogenous 2-ClFALD superfusion. Thus, our study provides some of the first evidence that MPO-derived free 2-ClFA plays an important role in CLP-induced sepsis by a PAI-1- and mast cell-dependent mechanism.
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Affiliation(s)
- Hong Yu
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - Yajun Liu
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - Meifang Wang
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - Ricardo J Restrepo
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - Derek Wang
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - Theodore J Kalogeris
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri
| | - William L Neumann
- Department of Pharmaceutical Sciences, Edwardsville School of Pharmacy, Southern Illinois University, Edwardsville, Illinois
| | - David A Ford
- Department of Biochemistry and Molecular Biology, Center for Cardiovascular Research, Saint Louis University School of Medicine, Saint Louis, Missouri
| | - Ronald J Korthuis
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, Missouri.,Dalton Cardiovascular Research Center, University of Missouri, Columbia, Missouri
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