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Seamons A, Staucean O, Snyder JM, Brabb T, Hsu CC, Paik J. ALDH1A Inhibition Suppresses Colitis and Alters α4β7 Integrin Expression on Activated T Cells in Mdr1a-/- Mice. Nutrients 2023; 15:3883. [PMID: 37764666 PMCID: PMC10536456 DOI: 10.3390/nu15183883] [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: 07/19/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
There are limited pharmacological treatment options for inflammatory bowel disease (IBD), and some of these options are expensive and administered by injection or infusion. Thus, new cheaper and easier (oral) treatment options are needed. ALDH1A enzymes produce retinoic acid that can affect intestinal diseases such as IBD by regulating immune cells in the gut. We previously demonstrated that an orally deliverable ALDH1A inhibitor, WIN 18,466, can suppress colitis in an acute mouse model of IBD. Here, we tested the efficacy of ALDH1A inhibition in a chronic mouse model of IBD. Mdr1a-/- mice were treated with a diet containing WIN 18,446 starting 1 week prior to inducing colitis by H. bilis inoculation. Treatment was continued until the study end point and colitis was monitored based on clinical symptoms and confirmed by histological analysis. Immune cell phenotypes in colon-draining lymph nodes (cMLN) were analyzed. WIN 18,446 treatment reduced clinical symptoms and improved histopathologic colitis scores. This was associated with decreased expression of the gut homing integrin, α4β7, on T cells in cMLN; increased expression of CD103, a protein associated with tissue-resident memory T cells; and changes in dendritic cells, plasmacytoid dendritic cells and B cells in inhibitor-treated mice. ALDH1A inhibition broadly influences immune cells during colitis and is a potential new target for IBD treatment. Future studies will be needed to determine the efficacy of ALDH1A inhibition on active colitis and to evaluate its relative efficacy in comparison to approved drugs.
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Affiliation(s)
| | | | | | | | | | - Jisun Paik
- Department of Comparative Medicine, University of Washington, Seattle, WA 98195, USA; (A.S.); (O.S.); (J.M.S.); (T.B.); (C.C.H.)
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Role of TLR5 in the Translocation and Dissemination of Commensal Bacteria in the Intestine after Traumatic Hemorrhagic Shock. J Immunol Res 2021; 2021:6417658. [PMID: 34840990 PMCID: PMC8626180 DOI: 10.1155/2021/6417658] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/02/2021] [Accepted: 10/28/2021] [Indexed: 12/11/2022] Open
Abstract
Enterogenous infection is a major cause of death during traumatic hemorrhagic shock (THS). It has been reported that Toll-like receptor 5 (TLR5) plays an integral role in regulating mucosal immunity and intestinal homeostasis of the microbiota. However, the roles played by TLR5 on intestinal barrier maintenance and commensal bacterial translocation post-THS are poorly understood. In this research, we established THS models in wild-type (WT) and Tlr5-/- (genetically deficient in TLR5 expression) mice. We found that THS promoted bacterial translocation, while TLR5 deficiency played a protective role in preventing commensal bacteria dissemination after THS. Furthermore, intestinal microbiota analysis uncovered that TLR5 deficiency enhanced the mucosal biological barrier by decreasing RegIIIγ-mediated bactericidal activity against G+ anaerobic bacteria. We then sorted small intestinal TLR5+ lamina propria dendritic cells (LPDCs) and analyzed TH1 differentiation in the intestinal lamina propria and a coculture system consisting of LPDCs and naïve T cells. Although TLR5 deficiency attenuated the regulation of TH1 polarization by LPDCs, it conferred stability to the cells during THS. Moreover, retinoic acid (RA) released from TLR5+ LPDCs could play a key role in modulating TH1 polarization. We also found that gavage administration of RA alleviated bacterial translocation in THS-treated WT mice. In summary, we documented that TLR5 signaling plays a pivotal role in regulating RegIIIγ-induced killing of G+ anaerobic bacteria, and LPDCs mediated TH1 differentiation via RA. These processes prevent intestinal bacterial translocation and enterogenous infection after THS, suggesting that therapeutically targeting LPDCs or gut microbiota can interfere with bacterial translocation after THS.
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Seamons A, Haenisch M, Meeker S, Pershutkina O, Brabb T, Treuting PM, Paik J. Protective Effects of ALDH1A Enzyme Inhibition on Helicobacter-Induced Colitis in Smad3 -/- Mice are Associated with Altered α4ß7 Integrin Expression on Activated T Cells. Nutrients 2020; 12:nu12102927. [PMID: 32987910 PMCID: PMC7599670 DOI: 10.3390/nu12102927] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 12/20/2022] Open
Abstract
Many inflammatory bowel disease (IBD) patients require surgical intervention due to limited pharmacological treatment options. Antibodies targeting α4ß7, a gut-homing integrin, are one of the most promising IBD treatments. As retinoic acid (RA) regulates expression of gut-homing proteins including α4ß7 integrin, we tested if ALDH1A enzymes in the RA synthesis pathway could be targeted for IBD treatment using a potent inhibitor, WIN 18,446. Age- and sex-matched Smad3-/- mice were fed a diet with and without WIN 18,446 for 3 weeks before triggering inflammation with Helicobacter bilis infection. Colitis was evaluated by histopathology one week following the IBD trigger, and T cell subsets were evaluated before and after the IBD trigger. WIN 18,446 treatment significantly reduced IBD severity in Smad3-/- mice and reduced expression of α4ß7 integrin on multiple activated CD4+ T cell subsets. This change was associated with increased ratios of induced regulatory T cells to Th17 cells during the inflammatory response in the draining lymph nodes. These studies indicate that RA reduction via ALDH1A enzyme inhibition is a potential new target for IBD treatment. Further studies are needed to examine its effects on other types of immune cells, to evaluate the efficacy window for this target, and to determine its efficacy in other animal models of IBD.
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Klepsch V, Moschen AR, Tilg H, Baier G, Hermann-Kleiter N. Nuclear Receptors Regulate Intestinal Inflammation in the Context of IBD. Front Immunol 2019; 10:1070. [PMID: 31139192 PMCID: PMC6527601 DOI: 10.3389/fimmu.2019.01070] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/26/2019] [Indexed: 12/26/2022] Open
Abstract
Gastrointestinal (GI) homeostasis is strongly dependent on nuclear receptor (NR) functions. They play a variety of roles ranging from nutrient uptake, sensing of microbial metabolites, regulation of epithelial intestinal cell integrity to shaping of the intestinal immune cell repertoire. Several NRs are associated with GI pathologies; therefore, systematic analysis of NR biology, the underlying molecular mechanisms, and regulation of target genes can be expected to help greatly in uncovering the course of GI diseases. Recently, an increasing number of NRs has been validated as potential drug targets for therapeutic intervention in patients with inflammatory bowel disease (IBD). Besides the classical glucocorticoids, especially PPARγ, VDR, or PXR-selective ligands are currently being tested with promising results in clinical IBD trials. Also, several pre-clinical animal studies are being performed with NRs. This review focuses on the complex biology of NRs and their context-dependent anti- or pro-inflammatory activities in the regulation of gastrointestinal barrier with special attention to NRs already pharmacologically targeted in clinic and pre-clinical IBD treatment regimens.
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Affiliation(s)
- Victoria Klepsch
- Translational Cell Genetics, Department of Pharmacology and Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Alexander R. Moschen
- Department of Internal Medicine I, Gastroenterology, Endocrinology and Metabolism, Medical University of Innsbruck, Innsbruck, Austria
| | - Herbert Tilg
- Department of Internal Medicine I, Gastroenterology, Endocrinology and Metabolism, Medical University of Innsbruck, Innsbruck, Austria
| | - Gottfried Baier
- Translational Cell Genetics, Department of Pharmacology and Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Natascha Hermann-Kleiter
- Translational Cell Genetics, Department of Pharmacology and Genetics, Medical University of Innsbruck, Innsbruck, Austria
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Barbalho SM, Goulart RDA, Batista GLDSA. Vitamin A and inflammatory bowel diseases: from cellular studies and animal models to human disease. Expert Rev Gastroenterol Hepatol 2019; 13:25-35. [PMID: 30791845 DOI: 10.1080/17474124.2019.1543588] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Vitamin A (VA) and metabolites such as Retinoic Acid (RA) and all-trans-RA (at-RA) are crucial in the modulation of the immune system and may be determinative in the balance of the immune responses. Inflammatory bowel diseases (IBD) consist of chronic relapsing and heterogeneous disorders with not well-known etiology. Due to its role in inflammatory processes, VA may be helpful in the treatment of IBD. Area covered: As VA plays a significant role in the inflammatory processes, this review aims to show the potential role of this vitamin in IBD, searching for cellular studies, animal models, and studies with humans. Expert commentary: Many studies have described the importance of alternative therapeutic approaches for IBD. Due to its role in the immune system, VA may also exert an indispensable role in the IBD. Nevertheless, some authors have shown that these compounds could stimulate the release of pro-inflammatory cytokines. For these reasons, more studies should be performed to establish the precise mechanisms of VA and its metabolites in systemic and intestinal inflammation.
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Affiliation(s)
- Sandra Maria Barbalho
- a School of Medicine , University of Marília (UNIMAR) , São Paulo , Brazil.,b Department of Biochemistry and Nutrition , Faculty of Food Technology of Marília (FATEC) , São Paulo , Brazil
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Large-Scale Integrative Analysis of Epigenetic Modifications Induced by Isotretinoin, Doxycycline and Metronidazole in Murine Colonic Intestinal Epithelial Cells. EPIGENOMES 2017. [DOI: 10.3390/epigenomes1030024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Naskar D, Teng F, Felix KM, Bradley CP, Wu HJJ. Synthetic Retinoid AM80 Ameliorates Lung and Arthritic Autoimmune Responses by Inhibiting T Follicular Helper and Th17 Cell Responses. THE JOURNAL OF IMMUNOLOGY 2017; 198:1855-1864. [PMID: 28130500 DOI: 10.4049/jimmunol.1601776] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022]
Abstract
Rheumatoid arthritis is an autoimmune disorder that affects the joints and other organs. Pulmonary complications contribute significantly to rheumatoid arthritis mortality. Retinoic acid and its synthetic compound AM80 play roles in immunoregulation but their effect on mucosal autoimmunity remains largely unknown. T follicular helper (Tfh) and Th17 cells are known to promote inflammation and autoantibody production. Using the K/BxN autoimmune arthritis model, we elucidate a novel mechanism whereby oral AM80 administration suppressed lung mucosa-associated Tfh and autoantibody responses by increasing the gut-homing α4β7 integrin expression on Tfh cells. This diverted Tfh cells from systemic (non-gut) inflamed sites such as the lung into the gut-associated lymphoid tissues, Peyer's patches, and thus reduced the systemic autoantibodies. AM80 also inhibited the lung Th17 response. AM80's effect in the lungs was readily applied to the joints as AM80 also inhibited Tfh and Th17 responses in the spleen, the major autoantibody producing site known to correlate with K/BxN arthritis severity. Finally, we used anti-β7 treatment as an alternative approach, demonstrating that manipulating T cell migration between the gut and systemic sites alters the systemic disease outcome. The β7 blockade prevented both Tfh and Th17 cells from entering the non-immunopathogenic site, the gut, and retained these T effector cells in the systemic sites, leading to augmented arthritis. These data suggest a dual beneficial effect of AM80, targeting both Tfh and Th17 cells, and warrant strict safety monitoring of gut-homing perturbing agents used in treating intestinal inflammation.
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Affiliation(s)
- Debdut Naskar
- Department of Immunobiology, University of Arizona, Tucson, AZ 85719; and
| | - Fei Teng
- Department of Immunobiology, University of Arizona, Tucson, AZ 85719; and
| | - Krysta M Felix
- Department of Immunobiology, University of Arizona, Tucson, AZ 85719; and
| | - C Pierce Bradley
- Department of Immunobiology, University of Arizona, Tucson, AZ 85719; and
| | - Hsin-Jung Joyce Wu
- Department of Immunobiology, University of Arizona, Tucson, AZ 85719; and .,Arizona Arthritis Center, College of Medicine, University of Arizona, Tucson, AZ 85719
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Tabanlioğlu Onan D, Hazar Tantoğlu B, Alli N, Özkan S, Samsar U, Köseoğlu HT, Artüz RF. Evaluation of the gastrointestinal findings of nodulocystic acnepatients during systemic isotretinoin therapy. Turk J Med Sci 2016; 46:820-4. [PMID: 27513262 DOI: 10.3906/sag-1412-142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 08/22/2015] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND/AIM Systemic isotretinoin treatment is an effective treatment modality for nodulocystic acne, the clinical use of which has been associated with reports of adverse events. We conducted a prospective study with the aim of determining the possible gastrointestinal and laboratory findings of nodulocystic acne patients during systemic isotretinoin treatment. MATERIALS AND METHODS Seventy patients with nodulocystic acne completed the study. During the monthly follow-up visits, liver function tests and lipid profiles of the patients were evaluated and gastrointestinal system complaints were examined. RESULTS We recorded a significant elevation in liver function tests and lipid profiles of the patients, the most prominent elevation being in plasma triglyceride concentrations. We observed that nausea, dyspepsia, abdominal pain, and diarrhea were the rare gastrointestinal symptoms encountered during systemic isotretinoin therapy. Constipation and anorectal bleeding were relatively more common symptoms and there seemed to be a relation between these two symptoms. CONCLUSION Our study is the first to analyze the gastrointestinal findings of patients during systemic isotretinoin treatment. Dermatologists and gastroenterologists must keep in mind that, as well as known laboratory findings like hypertriglyceridemia and elevated liver function tests, systemic isotretinoin therapy may also cause significant clinical gastrointestinal findings.
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Affiliation(s)
- Duru Tabanlioğlu Onan
- Department of Dermatology, Ankara Numune Training and Research Hospital, Ankara, Turkey
| | - Burcu Hazar Tantoğlu
- Department of Dermatology, Ankara Numune Training and Research Hospital, Ankara, Turkey
| | - Nuran Alli
- Department of Dermatology, Ankara Numune Training and Research Hospital, Ankara, Turkey
| | - Seçil Özkan
- Department of Public Health, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Ufuk Samsar
- Gastroenterology Unit, Konya Numune Hospital, Konya, Turkey
| | - Hasan Tankut Köseoğlu
- Department of Gastroenterology, Ankara Numune Training and Research Hospital, Ankara, Turkey
| | - Refika Ferda Artüz
- Department of Dermatology, Ankara Numune Training and Research Hospital, Ankara, Turkey
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Paroly SS, Wang F, Spraggon L, Merregaert J, Batourina E, Tycko B, Schmidt-Ott KM, Grimmond S, Little M, Mendelsohn C. Stromal protein Ecm1 regulates ureteric bud patterning and branching. PLoS One 2013; 8:e84155. [PMID: 24391906 PMCID: PMC3877229 DOI: 10.1371/journal.pone.0084155] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 11/12/2013] [Indexed: 01/28/2023] Open
Abstract
The interactions between the nephrogenic mesenchyme and the ureteric bud during kidney development are well documented. While recent studies have shed some light on the importance of the stroma during renal development, many of the signals generated in the stroma, the genetic pathways and interaction networks involving the stroma are yet to be identified. Our previous studies demonstrate that retinoids are crucial for branching of the ureteric bud and for patterning of the cortical stroma. In the present study we demonstrate that autocrine retinoic acid (RA) signaling in stromal cells is critical for their survival and patterning, and show that Extracellular matrix 1, Ecm1, a gene that in humans causes irritable bowel syndrome and lipoid proteinosis, is a novel RA-regulated target in the developing kidney, which is secreted from the cortical stromal cells surrounding the cap mesenchyme and ureteric bud. Our studies suggest that Ecm1 is required in the ureteric bud for regulating the distribution of Ret which is normally restricted to the tips, as inhibition of Ecm1 results in an expanded domain of Ret expression and reduced numbers of branches. We propose a model in which retinoid signaling in the stroma activates expression of Ecm1, which in turn down-regulates Ret expression in the ureteric bud cleft, where bifurcation normally occurs and normal branching progresses.
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Affiliation(s)
- Suneeta S. Paroly
- Department of Urology, Irving Cancer Research Center, Columbia University, New York, New York, United States of America
- * E-mail:
| | - Fengwei Wang
- Department of Urology, Irving Cancer Research Center, Columbia University, New York, New York, United States of America
| | - Lee Spraggon
- Department of Urology, Irving Cancer Research Center, Columbia University, New York, New York, United States of America
| | - Joseph Merregaert
- Laboratory of Molecular Biotechnology, Department of Biochemistry, University of Antwerp, Wilrijk, Belgium
| | - Ekatherina Batourina
- Department of Urology, Irving Cancer Research Center, Columbia University, New York, New York, United States of America
| | - Benjamin Tycko
- Institute for Cancer Genetics & Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Columbia University, New York, New York, United States of America
| | - Kai M. Schmidt-Ott
- Max-Delbrueck Center for Molecular Medicine Robert-Roessle-Str. Berlin, Germany
| | - Sean Grimmond
- Institute for Molecular Bioscience, The University of Queensland St Lucia QLD, Australia
| | - Melissa Little
- Institute for Molecular Bioscience, The University of Queensland St Lucia QLD, Australia
| | - Cathy Mendelsohn
- Department of Urology, Irving Cancer Research Center, Columbia University, New York, New York, United States of America
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