Intestinal Ischemia/Reperfusion Injury Mechanisms
Summary
Intestinal ischaemia/reperfusion (I/R) injury arises when a transient loss of blood supply to the gut is followed by restoration of circulation. The initial ischaemic phase deprives epithelial cells of oxygen and nutrients, leading to cellular energy failure and disruption of tight junctions within the intestinal barrier. Reperfusion paradoxically exacerbates damage through a burst of reactive oxygen species (ROS), which oxidise lipids, proteins and nucleic acids. Endothelial activation and leukocyte adhesion further compromise microvascular perfusion, while resident immune cells release pro-inflammatory cytokines that amplify local tissue injury. Apoptotic and necrotic pathways converge to drive mucosal necrosis, barrier breakdown and bacterial translocation, precipitating systemic inflammation or multi-organ dysfunction. Recent insights have revealed critical roles for gut microbial communities and their metabolites in modulating host responses, as well as for pattern-recognition receptors such as toll-like receptors in orchestrating inflammatory cascades. Emerging therapeutic strategies aim to attenuate oxidative stress, stabilise barrier function and harness microbial-derived bioactives to promote epithelial repair, reflecting the multifaceted nature of I/R pathogenesis and its global clinical significance in surgery, shock and transplantation contexts.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Intestinal Ischemia/Reperfusion Injury Mechanisms publication trend
The graph below shows the total number of articles in intestinal ischemia/reperfusion injury mechanisms across all publications each year (not limited to Nature Index journals).
Technical terms
Ischaemia/Reperfusion injury (I/R injury): Tissue damage resulting from the restoration of blood flow after a period of oxygen deprivation.
Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that can damage cellular structures.
Intestinal epithelium: The single-cell-layer lining of the gut that forms a selective barrier between the lumen and underlying tissue.
Gut microbiota: The community of microorganisms residing in the gastrointestinal tract, which influences host immunity and metabolism.
Toll-like receptor 2 (TLR2): A pattern-recognition receptor on immune cells that detects microbial components and initiates inflammatory signalling.
Innate lymphoid cells type II (ILC2): Tissue-resident lymphocytes that produce cytokines such as IL-13 to support tissue repair and barrier function.
Interleukin-10 (IL-10): An anti-inflammatory cytokine that limits immune activation and promotes resolution of inflammation.
References
- Microbiota-derived tryptophan metabolites indole-3-lactic acid is associated with intestinal ischemia/reperfusion injury via positive regulation of YAP and Nrf2. Journal of Translational Medicine (2023).
- Lactobacillus murinus alleviate intestinal ischemia/reperfusion injury through promoting the release of interleukin-10 from M2 macrophages via Toll-like receptor 2 signaling. Microbiome (2022).
- Gut Microbial Metabolite Pravastatin Attenuates Intestinal Ischemia/Reperfusion Injury Through Promoting IL-13 Release From Type II Innate Lymphoid Cells via IL−33/ST2 Signaling. Frontiers in Immunology (2021).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.