1
|
Al-Mansori A, Al-Sbiei A, Bashir GH, Qureshi MM, Tariq S, Altahrawi A, al-Ramadi BK, Fernandez-Cabezudo MJ. Effect of acetylcholinesterase inhibition on immune cells in the murine intestinal mucosa. Heliyon 2024; 10:e33849. [PMID: 39071679 PMCID: PMC11283160 DOI: 10.1016/j.heliyon.2024.e33849] [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: 03/01/2024] [Revised: 06/27/2024] [Accepted: 06/27/2024] [Indexed: 07/30/2024] Open
Abstract
The gastrointestinal tract (GI) is the largest immune organ whose function is controlled by a complex network of neurons from the enteric nervous system (ENS) as well as the sympathetic and parasympathetic system. Evolving evidence indicates that cross-communication between gut-innervating neurons and immune cells regulates many essential physiological functions including protection against mucosal infections. We previously demonstrated that following paraoxon treatment, 70 % of the mice were able to survive an oral infection with S. typhimurium, a virulent strain of Salmonella enterica serovar Typhimurium. The present study aims to investigate the effect that rivastigmine, a reversible AChE inhibitor used for the treatment of neurodegenerative diseases, has on the murine immune defenses of the intestinal mucosa. Our findings show that, similar to what is observed with paraoxon, administration of rivastigmine promoted the release of secretory granules from goblet and Paneth cells, resulting in increased mucin layer. Surprisingly, however, and unlike paraoxon, rivastigmine treatment did not affect overall mortality of infected mice. In order to investigate the mechanistic basis for the differential effects observed between paraoxon and rivastigmine, we used multi-color flowcytometric analysis to characterize the immune cell landscape in the intraepithelial (IE) and lamina propria (LP) compartments of intestinal mucosa. Our data indicate that treatment with paraoxon, but not rivastigmine, led to an increase of resident CD3+CD8+ T lymphocytes in the ileal mucosa (epithelium and lamina propria) and CD11b- CD11c+ dendritic cells in the LP. Our findings indicate the requirement for persistent cholinergic pathway engagement to effect a change in the cellular landscape of the mucosal tissue that is necessary for protection against lethal bacterial infections. Moreover, optimal protection requires a collaboration between innate and adaptive mucosal immune responses in the intestine.
Collapse
Affiliation(s)
- Alreem Al-Mansori
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Ashraf Al-Sbiei
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Ghada H. Bashir
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Mohammed M. Qureshi
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Saeed Tariq
- Department of Anatomy, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Abeer Altahrawi
- Department of Pathology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
| | - Basel K. al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Maria J. Fernandez-Cabezudo
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab University, Al-Ain, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| |
Collapse
|
2
|
Yang M, Pan L, Tian H, Zhou T, Xin H, Feng Y, Zou X, Lv Z, Xu Y, Jin X, Gui S, Lu X. pH- and Matrix Metalloproteinase-Responsive Multifunctional Bilayer Microneedles Platform for Treatment of Tinea Pedis. ACS Biomater Sci Eng 2024; 10:3108-3119. [PMID: 38659287 PMCID: PMC11094678 DOI: 10.1021/acsbiomaterials.4c00305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/05/2024] [Accepted: 04/16/2024] [Indexed: 04/26/2024]
Abstract
Persistent foot odor and itchiness are common symptoms of tinea pedis, significantly disrupting the daily life of those affected. The cuticular barrier at the site of the tinea pedis is thickened, which impedes the effective penetration of antifungal agents. Additionally, fungi can migrate from the skin surface to deeper tissues, posing challenges in the current clinical treatment for tinea pedis. To effectively treat tinea pedis, we developed a platform of bilayer gelatin methacrylate (GelMA) microneedles (MNs) loaded with salicylic acid (SA) and FK13-a1 (SA/FK13-a1@GelMA MNs). SA/FK13-a1@GelMA MNs exhibit pH- and matrix metalloproteinase (MMP)-responsive properties for efficient drug delivery. The MNs are designed to deliver salicylic acid (SA) deep into the stratum corneum, softening the cuticle and creating microchannels. This process enables the antibacterial peptide FK13-a1 to penetrate through the stratum corneum barrier, facilitating intradermal diffusion and exerting antifungal and anti-inflammatory effects. In severe cases of tinea pedis, heightened local pH levels and MMP activity further accelerate drug release. Our research demonstrates that SA/FK13-a1@GelMA MNs are highly effective against Trichophyton mentagrophytes, Trichophyton rubrum, and Candida albicans. They also reduced stratum corneum thickness, fungal burden, and inflammation in a guinea pig model of tinea pedis induced by T. mentagrophytes. Furthermore, it was discovered that SA/FK13-a1@GelMA MNs exhibit excellent biocompatibility. These findings suggest that SA/FK13-a1@GelMA MNs have significant potential for the clinical treatment of tinea pedis as well as other fungal skin disorders.
Collapse
Affiliation(s)
- Musheng Yang
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Lingling Pan
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Hongmei Tian
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Tao Zhou
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Hui Xin
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Yonglin Feng
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Xuan Zou
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Ziquan Lv
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Yinghua Xu
- Key
Laboratory of the Ministry of Health for Research on Quality and Standardization
of Biotechnology Products, National Institutes
for Food and Drug Control, Beijing 102629, China
| | - Xiaobao Jin
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
| | - Shuiqing Gui
- Intensive
Care Unit, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen 518031, China
| | - Xuemei Lu
- Guangdong
Provincial Key Laboratory of Pharmaceutical Bioactive Substances,
School of Basic Medical Sciences, Guangdong
Pharmaceutical University, Guangzhou 510006, China
- Shenzhen
Center for Disease Control and Prevention, Shenzhen 518055, China
| |
Collapse
|
3
|
Mohamed AA, al-Ramadi BK, Fernandez-Cabezudo MJ. Interplay between Microbiota and γδ T Cells: Insights into Immune Homeostasis and Neuro-Immune Interactions. Int J Mol Sci 2024; 25:1747. [PMID: 38339023 PMCID: PMC10855551 DOI: 10.3390/ijms25031747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 02/12/2024] Open
Abstract
The gastrointestinal (GI) tract of multicellular organisms, especially mammals, harbors a symbiotic commensal microbiota with diverse microorganisms including bacteria, fungi, viruses, and other microbial and eukaryotic species. This microbiota exerts an important role on intestinal function and contributes to host health. The microbiota, while benefiting from a nourishing environment, is involved in the development, metabolism and immunity of the host, contributing to the maintenance of homeostasis in the GI tract. The immune system orchestrates the maintenance of key features of host-microbe symbiosis via a unique immunological network that populates the intestinal wall with different immune cell populations. Intestinal epithelium contains lymphocytes in the intraepithelial (IEL) space between the tight junctions and the basal membrane of the gut epithelium. IELs are mostly CD8+ T cells, with the great majority of them expressing the CD8αα homodimer, and the γδ T cell receptor (TCR) instead of the αβ TCR expressed on conventional T cells. γδ T cells play a significant role in immune surveillance and tissue maintenance. This review provides an overview of how the microbiota regulates γδ T cells and the influence of microbiota-derived metabolites on γδ T cell responses, highlighting their impact on immune homeostasis. It also discusses intestinal neuro-immune regulation and how γδ T cells possess the ability to interact with both the microbiota and brain.
Collapse
Affiliation(s)
- Alaa A. Mohamed
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
| | - Basel K. al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Maria J. Fernandez-Cabezudo
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| |
Collapse
|
4
|
Gupta S, Dinesh S, Sharma S. Bridging the Mind and Gut: Uncovering the Intricacies of Neurotransmitters, Neuropeptides, and their Influence on Neuropsychiatric Disorders. Cent Nerv Syst Agents Med Chem 2024; 24:2-21. [PMID: 38265387 DOI: 10.2174/0118715249271548231115071021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/31/2023] [Accepted: 10/04/2023] [Indexed: 01/25/2024]
Abstract
BACKGROUND The gut-brain axis (GBA) is a bidirectional signaling channel that facilitates communication between the gastrointestinal tract and the brain. Recent research on the gut-brain axis demonstrates that this connection enables the brain to influence gut function, which in turn influences the brain and its cognitive functioning. It is well established that malfunctioning of this axis adversely affects both systems' ability to operate effectively. OBJECTIVE Dysfunctions in the GBA have been associated with disorders of gut motility and permeability, intestinal inflammation, indigestion, constipation, diarrhea, IBS, and IBD, as well as neuropsychiatric and neurodegenerative disorders like depression, anxiety, schizophrenia, autism, Alzheimer's, and Parkinson's disease. Multiple research initiatives have shown that the gut microbiota, in particular, plays a crucial role in the GBA by participating in the regulation of a number of key neurochemicals that are known to have significant effects on the mental and physical well-being of an individual. METHODS Several studies have investigated the relationship between neuropsychiatric disorders and imbalances or disturbances in the metabolism of neurochemicals, often leading to concomitant gastrointestinal issues and modifications in gut flora composition. The interaction between neurological diseases and gut microbiota has been a focal point within this research. The novel therapeutic interventions in neuropsychiatric conditions involving interventions such as probiotics, prebiotics, and dietary modifications are outlined in this review. RESULTS The findings of multiple studies carried out on mice show that modulating and monitoring gut microbiota can help treat symptoms of such diseases, which raises the possibility of the use of probiotics, prebiotics, and even dietary changes as part of a new treatment strategy for neuropsychiatric disorders and their symptoms. CONCLUSION The bidirectional communication between the gut and the brain through the gut-brain axis has revealed profound implications for both gastrointestinal and neurological health. Malfunctions in this axis have been connected to a range of disorders affecting gut function as well as cognitive and neuropsychiatric well-being. The emerging understanding of the role of gut microbiota in regulating key neurochemicals opens up possibilities for novel treatment approaches for conditions like depression, anxiety, and neurodegenerative diseases.
Collapse
Affiliation(s)
- Saumya Gupta
- Department of Bioinformatics, BioNome, Bengaluru, India
| | - Susha Dinesh
- Department of Bioinformatics, BioNome, Bengaluru, India
| | - Sameer Sharma
- Department of Bioinformatics, BioNome, Bengaluru, India
| |
Collapse
|
5
|
Zajonz TS, Kunzemann C, Schreiner AL, Beckert F, Schneck E, Boening A, Markmann M, Sander M, Koch C. Potentials of Acetylcholinesterase and Butyrylcholinesterase Alterations in On-Pump Coronary Artery Bypass Surgery in Postoperative Delirium: An Observational Trial. J Clin Med 2023; 12:5245. [PMID: 37629287 PMCID: PMC10455192 DOI: 10.3390/jcm12165245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/31/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Cardiac surgery is regularly associated with postoperative delirium (POD), affected by neuro-inflammation and changes in cholinergic activity. Therefore, this prospective observational study aimed to evaluate whether pre- and perioperative changes in blood acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activity were associated with POD development in patients undergoing isolated elective coronary artery bypass graft (CABG) surgery. It included 93 patients. Pre- and postoperative blood AChE and BChE activities were measured with photometric rapid-point-of-care-testing. The Intensive Care Delirium Screening Checklist and the Confusion Assessment Method for the Intensive Care Unit were used to screen patients for POD. POD developed in 20 patients (21.5%), who were older (p = 0.003), had higher EuroSCOREs (p ≤ 0.001), and had longer intensive care unit stays (p < 0.001). On postoperative day one, BChE activity decreased from preoperative values more in patients with (31.9%) than without (23.7%) POD (group difference p = 0.002). Applying a cutoff of ≥32.0% for BChE activity changes, receiver operating characteristic analysis demonstrated a moderate prediction capability for POD (area under the curve = 0.72, p = 0.002). The risk of developing POD was 4.31 times higher with a BChE activity change of ≥32.0% (p = 0.010). Monitoring the pre- to postoperative reduction in BChE activity might be a clinically practicable biomarker for detecting patients at risk of developing POD after CABG surgery.
Collapse
Affiliation(s)
- Thomas S. Zajonz
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Christian Kunzemann
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Anna Lena Schreiner
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Frauke Beckert
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Emmanuel Schneck
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Andreas Boening
- Department of Cardiac and Vascular Surgery, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany;
| | - Melanie Markmann
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Michael Sander
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| | - Christian Koch
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, University Hospital of Giessen and Marburg, Justus Liebig University of Giessen, 35392 Giessen, Germany; (C.K.); (A.L.S.); (F.B.); (E.S.); (M.M.); (M.S.); (C.K.)
| |
Collapse
|
6
|
Uwada J, Nakazawa H, Muramatsu I, Masuoka T, Yazawa T. Role of Muscarinic Acetylcholine Receptors in Intestinal Epithelial Homeostasis: Insights for the Treatment of Inflammatory Bowel Disease. Int J Mol Sci 2023; 24:ijms24076508. [PMID: 37047478 PMCID: PMC10095461 DOI: 10.3390/ijms24076508] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
Inflammatory bowel disease (IBD), which includes Crohn’s disease and ulcerative colitis, is an intestinal disorder that causes prolonged inflammation of the gastrointestinal tract. Currently, the etiology of IBD is not fully understood and treatments are insufficient to completely cure the disease. In addition to absorbing essential nutrients, intestinal epithelial cells prevent the entry of foreign antigens (micro-organisms and undigested food) through mucus secretion and epithelial barrier formation. Disruption of the intestinal epithelial homeostasis exacerbates inflammation. Thus, the maintenance and reinforcement of epithelial function may have therapeutic benefits in the treatment of IBD. Muscarinic acetylcholine receptors (mAChRs) are G protein-coupled receptors for acetylcholine that are expressed in intestinal epithelial cells. Recent studies have revealed the role of mAChRs in the maintenance of intestinal epithelial homeostasis. The importance of non-neuronal acetylcholine in mAChR activation in epithelial cells has also been recognized. This review aimed to summarize recent advances in research on mAChRs for intestinal epithelial homeostasis and the involvement of non-neuronal acetylcholine systems, and highlight their potential as targets for IBD therapy.
Collapse
|
7
|
Zhou JY, Lin HL, Qin YC, Li XG, Gao CQ, Yan HC, Wang XQ. l-Carnosine Protects Against Deoxynivalenol-Induced Oxidative Stress in Intestinal Stem Cells by Regulating the Keap1/Nrf2 Signaling Pathway. Mol Nutr Food Res 2021; 65:e2100406. [PMID: 34216418 DOI: 10.1002/mnfr.202100406] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/15/2021] [Indexed: 12/23/2022]
Abstract
SCOPE The intestinal epithelium is nourished by various nutrients and subjected to persistent and widespread feed-derived mycotoxin stress. l-Carnosine (LC) possesses robust antioxidant activity; however, its role in protecting intestinal mucosa against deoxynivalenol (DON) is still unclear. METHODS AND RESULTS In this study, 300 mg kg-1 BW LC and 3 mg kg-1 BW DON are orally administered to mice either alone or in combination for 10 days to investigate the role of LC in protecting the intestine against DON. This study found that LC alleviates the growth retardation of mice and repairs the damaged jejunal structure and barrier functions under DON exposure. LC rescues the intestinal stem cells (ISCs), increases the growth advantage in enteroids derived from jejunal crypts of mice in each group ex vivo, improves the proliferation and apoptosis of intestinal cells, and promotes ISC differentiation into absorptive cells, goblet cells, and Paneth cells. Furthermore, LC activates Nrf2 signaling by binding to Keap1 to reverse the striking DON-induced increase in ROS levels. CONCLUSION The study findings unveil that LC potentiates the antioxidant capacity of ISCs by regulating the Keap1/Nrf2 signaling pathway, which contributes to the intestinal epithelial regeneration response to DON insult.
Collapse
Affiliation(s)
- Jia-Yi Zhou
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| | - Hua-Lin Lin
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| | - Ying-Chao Qin
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| | - Xiang-Guang Li
- Department of Pharmaceutical Engineering, School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China
| | - Chun-Qi Gao
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| | - Hui-Chao Yan
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| | - Xiu-Qi Wang
- College of Animal Science, South China Agricultural University/Guangdong Laboratory for Lingnan Modern Agriculture/Guangdong Provincial Key Laboratory of Animal Nutrition Control/National Engineering Research Center for Breeding Swine Industry, Guangzhou, 510642, China
| |
Collapse
|
8
|
França TT, Al-Sbiei A, Bashir G, Mohamed YA, Salgado RC, Barreiros LA, Maria da Silva Napoleão S, Weber CW, Fernandes Severo Ferreira J, Aranda CS, Prando C, de Barros Dorna MB, Jurisica I, Fernandez-Cabezudo MJ, Ochs HD, Condino-Neto A, Al-Ramadi BK, Cabral-Marques O. CD40L modulates transcriptional signatures of neutrophils in the bone marrow associated with development and trafficking. JCI Insight 2021; 6:e148652. [PMID: 34255742 PMCID: PMC8410015 DOI: 10.1172/jci.insight.148652] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Neutrophils are produced in the BM in a process called granulopoiesis, in which progenitor cells sequentially develop into mature neutrophils. During the developmental process, which is finely regulated by distinct transcription factors, neutrophils acquire the ability to exit the BM, properly distribute throughout the body, and migrate to infection sites. Previous studies have demonstrated that CD40 ligand (CD40L) influences hematopoiesis and granulopoiesis. Here, we investigate the effect of CD40L on neutrophil development and trafficking by performing functional and transcriptome analyses. We found that CD40L signaling plays an essential role in the early stages of neutrophil generation and development in the BM. Moreover, CD40L modulates transcriptional signatures, indicating that this molecule enables neutrophils to traffic throughout the body and to migrate in response to inflammatory signals. Thus, our study provides insights into the complex relationships between CD40L signaling and granulopoiesis, and it suggests a potentially novel and nonredundant role of CD40L signaling in neutrophil development and function.
Collapse
Affiliation(s)
- Tábata Takahashi França
- Department of Immunology, Institute of Biomedical Science, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Ashraf Al-Sbiei
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates (UAE) University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Ghada Bashir
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates (UAE) University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Yassir Awad Mohamed
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates (UAE) University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Ranieri Coelho Salgado
- Department of Immunology, Institute of Biomedical Science, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Lucila Akune Barreiros
- Department of Immunology, Institute of Biomedical Science, University of São Paulo, São Paulo, São Paulo, Brazil
| | | | - Cristina Worm Weber
- Pediatric Allergy & Immunology Clinic, Caxias do Sul, Rio Grande do Sul, Brazil
| | | | - Carolina Sanchez Aranda
- Division of Allergy, Immunology, and Rheumatology, Department of Pediatrics, Federal University of São Paulo, São Paulo, São Paulo, Brazil
| | - Carolina Prando
- Faculdades Pequeno Príncipe, Pelé Pequeno Principe Research Intitute, Curitiba, Paraná, Brazil.,Hospital Pequeno Príncipe, Curitiba, Paraná, Brazil
| | - Mayra B de Barros Dorna
- Division of Allergy and Immunology, Department of Pediatrics, Children's Institute, Hospital das Clínicas, São Paulo, São Paulo, Brazil
| | - Igor Jurisica
- Osteoarthritis Research Program, Division of Orthopedic Surgery, Schroeder Arthritis Institute, University Health Network, Krembil Research Institute, University Health Network, Departments of Medical Biophysics and Computer Science, University of Toronto, Toronto, Ontaro, Canada.,Institute of Neuroimmunology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Maria J Fernandez-Cabezudo
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, UAE University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Hans D Ochs
- Department of Pediatrics, University of Washington School of Medicine, and Seattle Children's Research Institute, Seattle, Washington, USA
| | - Antonio Condino-Neto
- Department of Immunology, Institute of Biomedical Science, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Basel K Al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates (UAE) University, Al Ain, Abu Dhabi, United Arab Emirates.,Zayed Center for Health Sciences, UAE University, Al Ain, Abu Dhabi, United Arab Emirates
| | - Otavio Cabral-Marques
- Department of Immunology, Institute of Biomedical Science, University of São Paulo, São Paulo, São Paulo, Brazil.,Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil.,Network of Immunity in Infection, Malignancy, and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), São Paulo, São Paulo, Brazil
| |
Collapse
|
9
|
Pohanka M. Pharmacological Influencing of The Cholinergic Anti-inflammatory Pathway in Infectious Diseases and Inflammatory Pathologies. Mini Rev Med Chem 2021; 21:660-669. [PMID: 33208075 DOI: 10.2174/1389557520666201117111715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/04/2020] [Accepted: 09/14/2020] [Indexed: 11/22/2022]
Abstract
The cholinergic anti-inflammatory pathway is a part of the parasympathetic nervous system and it can also be entitled as an anti-inflammatory reflex. It consists of terminations of the vagal nerve into blood, acetylcholine released from the terminations, macrophages and other cells having α7 nicotinic acetylcholine receptor (α7 nAChR), calcium ions crossing through the receptor and interacting with nuclear factors, and erythrocytes with acetylcholinesterase (AChE) terminating the neurotransmission. Stopping of inflammatory cytokines production is the major task for the cholinergic antiinflammatory pathway. The cholinergic anti-inflammatory pathway can be stimulated or suppressed by agonizing or antagonizing α7 nAChR or by inhibition of AChE. This review is focused on cholinergic anti-inflammatory pathway regulation by drugs. Compounds that inhibit cholinesterases (for instance, huperzine, rivastigmine, galantamine), and their impact on the cholinergic anti-inflammatory pathway are discussed here and a survey of actual literature is provided.
Collapse
Affiliation(s)
- Miroslav Pohanka
- Faculty of Military Health Sciences, University of Defense, Trebesska 1575, Hradec Kralove CZ-50001, Czech Republic
| |
Collapse
|
10
|
miR-802 regulates Paneth cell function and enterocyte differentiation in the mouse small intestine. Nat Commun 2021; 12:3339. [PMID: 34099655 PMCID: PMC8184787 DOI: 10.1038/s41467-021-23298-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 04/20/2021] [Indexed: 02/05/2023] Open
Abstract
The intestinal epithelium is a complex structure that integrates digestive, immunological, neuroendocrine, and regenerative functions. Epithelial homeostasis is maintained by a coordinated cross-talk of different epithelial cell types. Loss of integrity of the intestinal epithelium plays a key role in inflammatory diseases and gastrointestinal infection. Here we show that the intestine-enriched miR-802 is a central regulator of intestinal epithelial cell proliferation, Paneth cell function, and enterocyte differentiation. Genetic ablation of mir-802 in the small intestine of mice leads to decreased glucose uptake, impaired enterocyte differentiation, increased Paneth cell function and intestinal epithelial proliferation. These effects are mediated in part through derepression of the miR-802 target Tmed9, a modulator of Wnt and lysozyme/defensin secretion in Paneth cells, and the downstream Wnt signaling components Fzd5 and Tcf4. Mutant Tmed9 mice harboring mutations in miR-802 binding sites partially recapitulate the augmented Paneth cell function of mice lacking miR-802. Our study demonstrates a broad miR-802 network that is important for the integration of signaling pathways of different cell types controlling epithelial homeostasis in the small intestine.
Collapse
|
11
|
Kappes L, Amer RL, Sommerlatte S, Bashir G, Plattfaut C, Gieseler F, Gemoll T, Busch H, Altahrawi A, Al-Sbiei A, Haneefa SM, Arafat K, Schimke LF, Khawanky NE, Schulze-Forster K, Heidecke H, Kerstein-Staehle A, Marschner G, Pitann S, Ochs HD, Mueller A, Attoub S, Fernandez-Cabezudo MJ, Riemekasten G, Al-Ramadi BK, Cabral-Marques O. Ambrisentan, an endothelin receptor type A-selective antagonist, inhibits cancer cell migration, invasion, and metastasis. Sci Rep 2020; 10:15931. [PMID: 32985601 PMCID: PMC7522204 DOI: 10.1038/s41598-020-72960-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 09/07/2020] [Indexed: 12/17/2022] Open
Abstract
Several studies reported a central role of the endothelin type A receptor (ETAR) in tumor progression leading to the formation of metastasis. Here, we investigated the in vitro and in vivo anti-tumor effects of the FDA-approved ETAR antagonist, Ambrisentan, which is currently used to treat patients with pulmonary arterial hypertension. In vitro, Ambrisentan inhibited both spontaneous and induced migration/invasion capacity of different tumor cells (COLO-357 metastatic pancreatic adenocarcinoma, OvCar3 ovarian carcinoma, MDA-MB-231 breast adenocarcinoma, and HL-60 promyelocytic leukemia). Whole transcriptome analysis using RNAseq indicated Ambrisentan's inhibitory effects on the whole transcriptome of resting and PAR2-activated COLO-357 cells, which tended to normalize to an unstimulated profile. Finally, in a pre-clinical murine model of metastatic breast cancer, treatment with Ambrisentan was effective in decreasing metastasis into the lungs and liver. Importantly, this was associated with a significant enhancement in animal survival. Taken together, our work suggests a new therapeutic application for Ambrisentan in the treatment of cancer metastasis.
Collapse
Affiliation(s)
- Lucy Kappes
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Ruba L Amer
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sabine Sommerlatte
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Ghada Bashir
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Corinna Plattfaut
- Section Experimental Oncology, University Hospital and Medical School (UKSH), University of Lübeck, Lübeck, Germany
| | - Frank Gieseler
- Section Experimental Oncology, University Hospital and Medical School (UKSH), University of Lübeck, Lübeck, Germany
| | - Timo Gemoll
- Section for Translational Surgical Oncology and Biobanking, Department of Surgery, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Hauke Busch
- Lübeck Institute for Experimental Dermatology (LIED) and Institute of Cardiogenetics, University of Lübeck, Lübeck, Germany
| | - Abeer Altahrawi
- Department of Pathology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Ashraf Al-Sbiei
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Shoja M Haneefa
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Kholoud Arafat
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Lena F Schimke
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Nadia El Khawanky
- Department of Hematology and Oncology, Faculty of Medicine, The University of Freiburg, Freiburg, Germany
| | - Kai Schulze-Forster
- CellTrend GmbH, Luckenwalde, Brandenburg, Germany
- Department of Urology, Charité University Hospital, Berlin, Germany
| | | | - Anja Kerstein-Staehle
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Gabriele Marschner
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Silke Pitann
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Hans D Ochs
- Department of Pediatrics, University of Washington School of Medicine, and Seattle Children's Research Institute, Seattle, WA, USA
| | - Antje Mueller
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Samir Attoub
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Maria J Fernandez-Cabezudo
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Gabriela Riemekasten
- Department of Rheumatology and Clinical Immunology, University of Lübeck, Lübeck, Germany
| | - Basel K Al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
| | - Otavio Cabral-Marques
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Lineu Prestes Avenue, 1730, São Paulo, SP, Brazil.
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.
- Network of Immunity in Infection, Malignancy, and Autoimmunity (NIIMA), Universal Scientific Education and Research Network (USERN), São Paulo, Brazil.
| |
Collapse
|
12
|
Gonkowski S, Gajęcka M, Makowska K. Mycotoxins and the Enteric Nervous System. Toxins (Basel) 2020; 12:toxins12070461. [PMID: 32707706 PMCID: PMC7404981 DOI: 10.3390/toxins12070461] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 12/14/2022] Open
Abstract
Mycotoxins are secondary metabolites produced by various fungal species. They are commonly found in a wide range of agricultural products. Mycotoxins contained in food enter living organisms and may have harmful effects on many internal organs and systems. The gastrointestinal tract, which first comes into contact with mycotoxins present in food, is particularly vulnerable to the harmful effects of these toxins. One of the lesser-known aspects of the impact of mycotoxins on the gastrointestinal tract is the influence of these substances on gastrointestinal innervation. Therefore, the present study is the first review of current knowledge concerning the influence of mycotoxins on the enteric nervous system, which plays an important role, not only in almost all regulatory processes within the gastrointestinal tract, but also in adaptive and protective reactions in response to pathological and toxic factors in food.
Collapse
Affiliation(s)
- Sławomir Gonkowski
- Department of Clinical Physiology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 13, 10-957 Olsztyn, Poland;
| | - Magdalena Gajęcka
- Department of Veterinary Prevention and Feed Hygiene, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego Str. 13, 10-718 Olsztyn, Poland;
| | - Krystyna Makowska
- Department of Clinical Diagnostics, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, Oczapowskiego 14, 10-957 Olsztyn, Poland
- Correspondence:
| |
Collapse
|
13
|
Cox MA, Bassi C, Saunders ME, Nechanitzky R, Morgado-Palacin I, Zheng C, Mak TW. Beyond neurotransmission: acetylcholine in immunity and inflammation. J Intern Med 2020; 287:120-133. [PMID: 31710126 DOI: 10.1111/joim.13006] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 08/24/2019] [Accepted: 09/10/2019] [Indexed: 12/21/2022]
Abstract
Acetylcholine (ACh) is best known as a neurotransmitter and was the first such molecule identified. ACh signalling in the neuronal cholinergic system has long been known to regulate numerous biological processes (reviewed by Beckmann and Lips). In actuality, ACh is a ubiquitous signalling molecule that is produced by numerous non-neuronal cell types and even by some single-celled organisms. Within multicellular organisms, a non-neuronal cholinergic system that includes the immune system functions in parallel with the neuronal cholinergic system. Several immune cell types both respond to ACh signals and can directly produce ACh. Recent work from our laboratory has demonstrated that the capacity to produce ACh is an intrinsic property of T cells responding to viral infection, and that this ability to produce ACh is dependent upon IL-21 signalling to the T cells. Furthermore, during infection this immune-derived ACh is necessary for the T cells to migrate into infected tissues. In this review, we will discuss the various sources of ACh that are relevant during immune responses and describe how ACh acts on immune cells to influence their functions. We will also address the clinical implications of this fascinating aspect of immunity, focusing on ACh's role in the migration of T cells during infection and cancer.
Collapse
Affiliation(s)
- M A Cox
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - C Bassi
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - M E Saunders
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - R Nechanitzky
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - I Morgado-Palacin
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - C Zheng
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - T W Mak
- The Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada.,Ontario Institute for Cancer Research, Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.,Department of Immunology, University of Toronto, Toronto, ON, Canada.,Department of Pathology, University of Hong Kong, Hong Kong, Hong Kong
| |
Collapse
|
14
|
Wani KA, Goswamy D, Irazoqui JE. Nervous system control of intestinal host defense in C. elegans. Curr Opin Neurobiol 2019; 62:1-9. [PMID: 31790812 DOI: 10.1016/j.conb.2019.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 11/01/2019] [Indexed: 12/16/2022]
Abstract
Interplay between the nervous and immune systems is critical for homeostasis, and its dysfunction underlies pathologies such as multiple sclerosis, autism, leukemia, and inflammation. The nematode Caenorhabditis elegans provides an opportunity to define evolutionarily conserved mechanisms of regulation of host innate immunity and inflammation in a genetically tractable whole-animal system. In the past few years, the C. elegans nervous system has emerged as an integral part of host defense against pathogens, acting through diverse mechanisms to repress or induce protective transcriptional responses to infection in distal tissues. In this review, we discuss current knowledge of the mechanisms through which the C. elegans nervous system controls the expression of host defense genes in the intestinal epithelium. Although still incomplete, the insights derived from such work have broad implications for neural regulation of epithelial function at mucosal barriers in higher organisms in health and disease.
Collapse
Affiliation(s)
- Khursheed A Wani
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
| | - Debanjan Goswamy
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA
| | - Javier E Irazoqui
- Department of Microbiology and Physiological Systems and Program in Innate Immunity, University of Massachusetts Medical School, Worcester, USA.
| |
Collapse
|
15
|
Fernández-Cabezudo MJ, George JA, Bashir G, Mohamed YA, Al-Mansori A, Qureshi MM, Lorke DE, Petroianu G, Al-Ramadi BK. Involvement of Acetylcholine Receptors in Cholinergic Pathway-Mediated Protection Against Autoimmune Diabetes. Front Immunol 2019; 10:1038. [PMID: 31156627 PMCID: PMC6529936 DOI: 10.3389/fimmu.2019.01038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/23/2019] [Indexed: 12/14/2022] Open
Abstract
Type I diabetes (T1D) is a T cell-driven autoimmune disease that results in the killing of pancreatic β-cells and, consequently, loss of insulin production. Using the multiple low-dose streptozotocin (MLD-STZ) model of experimental autoimmune diabetes, we previously reported that pretreatment with a specific acetylcholinesterase inhibitor (AChEI), paraoxon, prevented the development of hyperglycemia in C57BL/6 mice. This correlated with an inhibition of T cell infiltration into the pancreatic islets and a reduction in pro-inflammatory cytokines. The cholinergic anti-inflammatory pathway utilizes nicotinic and muscarinic acetylcholine receptors (nAChRs and mAChRs, respectively) expressed on a variety of cell types. In this study, we carried out a comparative analysis of the effect of specific antagonists of nAChRs or mAChRs on the development of autoimmune diabetes. Co-administration of mecamylamine, a non-selective antagonist of nAChRs maintained the protective effect of AChEI on the development of hyperglycemia. In contrast, co-administration of atropine, a non-selective antagonist of mAChRs, mitigated AChEI-mediated protection. Mice pretreated with mecamylamine had an improved response in glucose tolerance test (GTT) than mice pretreated with atropine. These differential effects of nAChR and mAChR antagonists correlated with the extent of islet cell infiltration and with the structure and functionality of the β-cells. Taken together, our data suggest that mAChRs are essential for the protective effect of cholinergic stimulation in autoimmune diabetes.
Collapse
Affiliation(s)
- Maria J Fernández-Cabezudo
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Junu A George
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Ghada Bashir
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Yassir A Mohamed
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Alreem Al-Mansori
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Mohammed M Qureshi
- Department of Biochemistry, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Dietrich E Lorke
- Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, United States
| | - Georg Petroianu
- Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, United States
| | - Basel K Al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, United Arab Emirates.,Department of Cellular Biology and Pharmacology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, United States
| |
Collapse
|