Subtopic Deep Dive
IL-33 in Tissue Homeostasis
Research Guide
What is IL-33 in Tissue Homeostasis?
IL-33 in Tissue Homeostasis examines the cytokine IL-33's roles in maintaining epithelial integrity, stem cell function, and repair programs across tissues like lung, skin, and gut.
IL-33 acts via ST2 receptor on ILC2s and other cells to promote type 2 immunity supporting homeostasis (Gieseck et al., 2017; 970 citations). Studies show ILC2s driven by IL-33 restore lung tissue post-influenza (Monticelli et al., 2011; 1248 citations). Research links IL-33 to skin barrier maintenance and allergen protection via microbiota interactions (Salimi et al., 2013; 932 citations; Stefka et al., 2014; 780 citations). Over 10 key papers from 2004-2020 address these mechanisms.
Why It Matters
IL-33 sustains epithelial barriers in lung, enabling ILC2-mediated recovery after influenza infection (Monticelli et al., 2011). In skin, IL-33-driven ILC2s produce IL-5 and IL-13 for homeostasis during allergen challenges (Salimi et al., 2013). Gut homeostasis benefits from microbiota-IL-33 interactions preventing allergen sensitization (Stefka et al., 2014; Zheng et al., 2020). Type 2 responses involving IL-33 promote repair in fibrosis models and metabolic tissues (Gieseck et al., 2017). These roles identify targets for degenerative diseases like COPD (Barnes, 2016) and IBD (Guan, 2019).
Key Research Challenges
IL-33/ST2 Signaling Specificity
Distinguishing IL-33's homeostatic versus inflammatory effects remains unclear, as ST2 expression varies by tissue. Monticelli et al. (2011) show ILC2 activation post-infection, but context-specific regulation lacks detail. Kurowska-Stolarska et al. (2009) highlight amplification in macrophages.
Microbiota-IL-33 Crosstalk
Interactions between commensal bacteria and IL-33 pathways in homeostasis need mapping. Zheng et al. (2020) and Stefka et al. (2014) demonstrate protection against sensitization, yet causal mechanisms in diverse tissues are undefined. Over 3500 citations underscore gaps.
Tissue Repair Quantification
Measuring IL-33's contribution to stem cell function and repair programs is challenging without longitudinal models. Gieseck et al. (2017) review type 2 immunity in fibrosis, but quantitative metrics for epithelial integrity are limited. Salimi et al. (2013) provide skin data.
Essential Papers
Interaction between microbiota and immunity in health and disease
Danping Zheng, Timur Liwinski, Eran Elinav · 2020 · Cell Research · 3.6K citations
Abstract The interplay between the commensal microbiota and the mammalian immune system development and function includes multifold interactions in homeostasis and disease. The microbiome plays cri...
Inflammatory mechanisms in patients with chronic obstructive pulmonary disease
Peter J. Barnes · 2016 · Journal of Allergy and Clinical Immunology · 1.5K citations
Innate lymphoid cells promote lung-tissue homeostasis after infection with influenza virus
Laurel A. Monticelli, Gregory F. Sonnenberg, Michael C. Abt et al. · 2011 · Nature Immunology · 1.2K citations
A Comprehensive Review and Update on the Pathogenesis of Inflammatory Bowel Disease
Qingdong Guan · 2019 · Journal of Immunology Research · 1.0K citations
Inflammatory bowel disease (IBD) is a chronic and life-threating inflammatory disease of gastroenteric tissue characterized by episodes of intestinal inflammation. The pathogenesis of IBD is comple...
Type 2 immunity in tissue repair and fibrosis
Richard L. Gieseck, Mark S. Wilson, Thomas A. Wynn · 2017 · Nature reviews. Immunology · 970 citations
A role for IL-25 and IL-33–driven type-2 innate lymphoid cells in atopic dermatitis
Maryam Salimi, Jillian L. Barlow, Sean P. Saunders et al. · 2013 · The Journal of Experimental Medicine · 932 citations
Type 2 innate lymphoid cells (ILC2s, nuocytes, NHC) require RORA and GATA3 for their development. We show that human ILC2s express skin homing receptors and infiltrate the skin after allergen chall...
Eosinophilic gastrointestinal disorders (EGID)
Marc E. Rothenberg · 2004 · Journal of Allergy and Clinical Immunology · 908 citations
Reading Guide
Foundational Papers
Start with Monticelli et al. (2011) for ILC2s in lung homeostasis post-infection; Salimi et al. (2013) for IL-33-driven skin ILC2s; Kurowska-Stolarska et al. (2009) for ST2 macrophage polarization.
Recent Advances
Gieseck et al. (2017) reviews type 2 immunity in repair; Zheng et al. (2020) covers microbiota-immunity homeostasis; Guan (2019) updates IBD pathogenesis with IL-33 relevance.
Core Methods
ILC2 isolation via flow cytometry and GATA3/RORA staining (Monticelli et al., 2011); ST2 knockout mice for signaling (Kurowska-Stolarska et al., 2009); microbiota gnotobiotic models (Stefka et al., 2014).
How PapersFlow Helps You Research IL-33 in Tissue Homeostasis
Discover & Search
Research Agent uses searchPapers and exaSearch to find IL-33 homeostasis papers like 'Innate lymphoid cells promote lung-tissue homeostasis after infection with influenza virus' by Monticelli et al. (2011), then citationGraph reveals connections to Gieseck et al. (2017) and findSimilarPapers uncovers microbiota links (Zheng et al., 2020).
Analyze & Verify
Analysis Agent applies readPaperContent to extract IL-33/ST2 data from Monticelli et al. (2011), verifies claims with verifyResponse (CoVe) against GRADE grading for evidence strength in ILC2 homeostasis, and runs PythonAnalysis to quantify ILC2 frequencies from supplementary tables using pandas.
Synthesize & Write
Synthesis Agent detects gaps in IL-33 repair quantification across tissues, flags contradictions between homeostatic (Monticelli et al., 2011) and inflammatory roles (Kurowska-Stolarska et al., 2009); Writing Agent uses latexEditText, latexSyncCitations for Monticelli et al., and latexCompile to generate review sections with exportMermaid for ILC2 signaling diagrams.
Use Cases
"Extract IL-33/ST2 expression data from lung homeostasis papers and plot ILC2 activation trends."
Research Agent → searchPapers('IL-33 lung homeostasis') → Analysis Agent → readPaperContent(Monticelli 2011) → runPythonAnalysis(pandas plot of flow cytometry data) → researcher gets matplotlib graph of post-infection recovery.
"Write LaTeX section on IL-33 in skin homeostasis with citations."
Research Agent → findSimilarPapers(Salimi 2013) → Synthesis Agent → gap detection → Writing Agent → latexEditText('IL-33 ILC2 skin') → latexSyncCitations(Salimi, Stefka) → latexCompile → researcher gets compiled PDF section.
"Find code for IL-33 signaling models in tissue repair."
Research Agent → searchPapers('IL-33 homeostasis model code') → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect → researcher gets annotated GitHub repo with simulation scripts.
Automated Workflows
Deep Research workflow scans 50+ papers via searchPapers on 'IL-33 tissue homeostasis ILC2', structures report with GRADE-graded evidence from Monticelli et al. (2011) and Gieseck et al. (2017). DeepScan applies 7-step analysis: citationGraph → readPaperContent → CoVe verification → Python quantification of repair metrics. Theorizer generates hypotheses on microbiota-IL-33 synergies from Zheng et al. (2020) and Stefka et al. (2014).
Frequently Asked Questions
What defines IL-33 in tissue homeostasis?
IL-33 maintains epithelial integrity and repair via ST2 on ILC2s in lung, skin, gut (Monticelli et al., 2011; Salimi et al., 2013).
What methods study IL-33 homeostasis?
Mouse influenza models assess ILC2 roles (Monticelli et al., 2011); skin allergen challenges track ILC2 cytokines (Salimi et al., 2013); microbiota depletion tests sensitization (Stefka et al., 2014).
What are key papers?
Monticelli et al. (2011; 1248 citations) on lung; Salimi et al. (2013; 932 citations) on skin; Gieseck et al. (2017; 970 citations) on type 2 repair.
What open problems exist?
Quantifying IL-33 contributions to stem cell function; resolving homeostatic vs. pathologic roles; mapping tissue-specific microbiota effects.
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Part of the IL-33, ST2, and ILC Pathways Research Guide