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Rahman-Enyart A, Yaggie RE, Bollinger JL, Arvanitis C, Winter DR, Schaeffer AJ, Klumpp DJ. Acyloxyacyl hydrolase regulates microglia-mediated pelvic pain. PLoS One 2022; 17:e0269140. [PMID: 35980963 PMCID: PMC9387837 DOI: 10.1371/journal.pone.0269140] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 05/15/2022] [Indexed: 12/04/2022] Open
Abstract
Chronic pelvic pain conditions such as interstitial cystitis/bladder pain syndrome (IC/BPS) remain clinical and mechanistic enigmas. Microglia are resident immune cells of the central nervous system (CNS) that respond to changes in the gut microbiome, and studies have linked microglial activation to acute and chronic pain in a variety of models, including pelvic pain. We have previously reported that mice deficient for the lipase acyloxyacyl hydrolase (AOAH) develop pelvic allodynia and exhibit symptoms, comorbidities, and gut dysbiosis mimicking IC/BPS. Here, we assessed the role of AOAH in microglial activation and pelvic pain. RNAseq analyses using the ARCHS4 database and confocal microscopy revealed that AOAH is highly expressed in wild type microglia but at low levels in astrocytes, suggesting a functional role for AOAH in microglia. Pharmacologic ablation of CNS microglia with PLX5622 resulted in decreased pelvic allodynia in AOAH-deficient mice and resurgence of pelvic pain upon drug washout. Skeletal analyses revealed that AOAH-deficient mice have an activated microglia morphology in the medial prefrontal cortex and paraventricular nucleus, brain regions associated with pain modulation. Because microglia express Toll-like receptors and respond to microbial components, we also examine the potential role of dysbiosis in microglial activation. Consistent with our hypothesis of microglia activation by leakage of gut microbes, we observed increased serum endotoxins in AOAH-deficient mice and increased activation of cultured BV2 microglial cells by stool of AOAH-deficient mice. Together, these findings demonstrate a role for AOAH in microglial modulation of pelvic pain and thus identify a novel therapeutic target for IC/BPS.
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Affiliation(s)
- Afrida Rahman-Enyart
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- Currently Proteintech Group Incorporated, Rosemont, Illinois, United States of America
| | - Ryan E. Yaggie
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Justin L. Bollinger
- Department of Pharmacology & Systems Physiology, College of Medicine University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Constadina Arvanitis
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- Center for Advanced Microscopy & Nikon Imaging Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Deborah R. Winter
- Division of Rheumatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - Anthony J. Schaeffer
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
| | - David J. Klumpp
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
- * E-mail:
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Coelho NR, Pimpão AB, Correia MJ, Rodrigues TC, Monteiro EC, Morello J, Pereira SA. Pharmacological blockage of the AHR-CYP1A1 axis: a call for in vivo evidence. J Mol Med (Berl) 2021; 100:215-243. [PMID: 34800164 PMCID: PMC8605459 DOI: 10.1007/s00109-021-02163-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 01/21/2023]
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-activated transcription factor that can be activated by structurally diverse compounds arising from the environment and the microbiota and host metabolism. Expanding evidence has been shown that the modulation of the canonical pathway of AHR occurs during several chronic diseases and that its abrogation might be of clinical interest for metabolic and inflammatory pathological processes. However, most of the evidence on the pharmacological abrogation of the AHR-CYP1A1 axis has been reported in vitro, and therefore, guidance for in vivo studies is needed. In this review, we cover the state-of-the-art of the pharmacodynamic and pharmacokinetic properties of AHR antagonists and CYP1A1 inhibitors in different in vivo rodent (mouse or rat) models of disease. This review will serve as a road map for those researchers embracing this emerging therapeutic area targeting the AHR. Moreover, it is a timely opportunity as the first AHR antagonists have recently entered the clinical stage of drug development.
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Affiliation(s)
- N R Coelho
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - A B Pimpão
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - M J Correia
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - T C Rodrigues
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - E C Monteiro
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - J Morello
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal
| | - S A Pereira
- CEDOC, NOVA Medical School, Universidade Nova de Lisboa, 1169-056, Lisboa, Portugal.
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Zhu Q, Li H, Li K, Wang Z, Tang Z. Proteomic analysis exploring the mechanism of bladder fibrosis induced by ketamine using a rat model. Transl Androl Urol 2021; 10:3300-3311. [PMID: 34532254 PMCID: PMC8421841 DOI: 10.21037/tau-21-351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/02/2021] [Indexed: 11/18/2022] Open
Abstract
Background Long-term abuse of ketamine can cause irreversible bladder fibrosis, but the mechanism of bladder fibrosis is still under investigation. This study aims to explore the mechanism of bladder fibrosis utilizing proteomic analysis in a rat model. Methods After building a rat model, hematoxylin and eosin (HE) staining, Masson’s trichrome staining, and western blotting (WB) of collagen I were used to assess bladder pathology and fibrosis in a rat model. Next, protein expression changes in the rat bladder by proteomic technology were quantitatively detected, and reverse transcription-polymerase chain reaction (RT-PCR) and WB were used to verify the expression of proteins. Bioinformatic techniques and functional analysis were also performed. Results Compared to the control group, thinning of the bladder epithelium layer, infiltration of submucosal inflammatory cells, deposition of many collagen fibers, and an elevated expression of collagen I were observed in the experimental group. A total of 3,690 proteins were identified, of which 423 proteins were upregulated, and 304 proteins were down-regulated. Eight out of ten mRNA expressions and acyloxyacyl hydrolase (AOAH), mast cell (MC) protease 1 protein expressions were in line with the proteomic results. Sixty-five differential expression proteins (DEPs) were found to belong to the immune system, and 18 of them were involved in immune diseases, according to KEGG analysis. Conclusions We consider that MC protease 1 and platelet activation pathways may play an important role in ketamine-induced bladder fibrosis.
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Affiliation(s)
- Quan Zhu
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, China
| | - Haozhen Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, China
| | - Kaixuan Li
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, China
| | - Zhao Wang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, China
| | - Zhengyan Tang
- Department of Urology, Xiangya Hospital, Central South University, Changsha, China.,Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, China
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Rahman-Enyart A, Yang W, Yaggie RE, White BA, Welge M, Auvil L, Berry M, Bushell C, Rosen JM, Rudick CN, Schaeffer AJ, Klumpp DJ. Acyloxyacyl hydrolase is a host determinant of gut microbiome-mediated pelvic pain. Am J Physiol Regul Integr Comp Physiol 2021; 321:R396-R412. [PMID: 34318715 PMCID: PMC8530758 DOI: 10.1152/ajpregu.00106.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/24/2021] [Accepted: 07/16/2021] [Indexed: 12/30/2022]
Abstract
Dysbiosis of gut microbiota is associated with many pathologies, yet host factors modulating microbiota remain unclear. Interstitial cystitis/bladder pain syndrome (IC/BPS) is a debilitating condition of chronic pelvic pain often with comorbid urinary dysfunction and anxiety/depression, and recent studies find fecal dysbiosis in patients with IC/BPS. We identified the locus encoding acyloxyacyl hydrolase, Aoah, as a modulator of pelvic pain severity in a murine IC/BPS model. AOAH-deficient mice spontaneously develop rodent correlates of pelvic pain, increased responses to induced pelvic pain models, voiding dysfunction, and anxious/depressive behaviors. Here, we report that AOAH-deficient mice exhibit dysbiosis of gastrointestinal (GI) microbiota. AOAH-deficient mice exhibit an enlarged cecum, a phenotype long associated with germ-free rodents, and a "leaky gut" phenotype. AOAH-deficient ceca showed altered gene expression consistent with inflammation, Wnt signaling, and urologic disease. 16S sequencing of stool revealed altered microbiota in AOAH-deficient mice, and GC-MS identified altered metabolomes. Cohousing AOAH-deficient mice with wild-type mice resulted in converged microbiota and altered predicted metagenomes. Cohousing also abrogated the pelvic pain phenotype of AOAH-deficient mice, which was corroborated by oral gavage of AOAH-deficient mice with stool slurry of wild-type mice. Converged microbiota also alleviated comorbid anxiety-like behavior in AOAH-deficient mice. Oral gavage of AOAH-deficient mice with anaerobes cultured from IC/BPS stool resulted in exacerbation of pelvic allodynia. Together, these data indicate that AOAH is a host determinant of normal gut microbiota, and dysbiosis associated with AOAH deficiency contributes to pelvic pain. These findings suggest that the gut microbiome is a potential therapeutic target for IC/BPS.
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Affiliation(s)
- Afrida Rahman-Enyart
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Wenbin Yang
- Division of Thoracic Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Ryan E Yaggie
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Bryan A White
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Michael Welge
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Loretta Auvil
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Matthew Berry
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Colleen Bushell
- National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - John M Rosen
- Department of Gastroenterology, Children's Mercy, Kansas City, Missouri
- Department of Pediatrics, University of Missouri, Kansas City, Missouri
| | - Charles N Rudick
- Clinical Pharmacology and Toxicology, Indiana University School of Medicine, Bloomington, Indiana
| | - Anthony J Schaeffer
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - David J Klumpp
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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Zderic SA. Let's not take voiding for granted. Am J Physiol Renal Physiol 2020; 318:F1313-F1314. [PMID: 32281416 DOI: 10.1152/ajprenal.00093.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Stephen A Zderic
- Division of Urology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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