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Lee JS, Wang RX, Goldberg MS, Clifford GP, Kao DJ, Colgan SP. Microbiota-Sourced Purines Support Wound Healing and Mucous Barrier Function. iScience 2020; 23:101226. [PMID: 32554188 PMCID: PMC7303675 DOI: 10.1016/j.isci.2020.101226] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/04/2020] [Accepted: 05/29/2020] [Indexed: 01/07/2023] Open
Abstract
The intestinal mucosa requires high levels of nucleotides for energy procurement, proliferation, and innate immunity. This need for nucleotide substrates substantially increases during injury, infection, and wound healing. In the present studies, we profile potential sources of purine nucleotides in murine mucosal tissue. This work reveals the gut microbiota as a prominent source of exogenous purines and that such microbiota-sourced purines (MSPs) are available to the intestinal mucosa. The MSPs are utilized for nucleotide genesis and promote energy balance. Further analyses reveal that colitic tissues lacking MSPs are proliferatively stunted, with notable energetic and endoplasmic reticulum stress to the detriment of mucous barrier integrity. Purine reconstitution either directly or through colonization of germ-free/antibiotic-treated mice with MSP-sufficient E. coli alleviates such deficits, establishing MSP as a critical source of substrate for tissue metabolism, wound healing, and mucous barrier sterile integrity.
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Affiliation(s)
- J Scott Lee
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA
| | - Ruth X Wang
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA
| | - Matthew S Goldberg
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA
| | - Garrett P Clifford
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA
| | - Daniel J Kao
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA
| | - Sean P Colgan
- Department of Medicine and the Mucosal Inflammation Program, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 East 19th Avenue, MS B-146, Aurora, CO 80045, USA.
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