Subtopic Deep Dive
Leukocyte Adhesion Deficiency and CD18
Research Guide
What is Leukocyte Adhesion Deficiency and CD18?
Leukocyte Adhesion Deficiency (LAD) is a genetic disorder caused by mutations in the CD18 gene encoding the β2-integrin subunit, impairing neutrophil emigration to inflammation sites.
CD18 deficiency leads to recurrent infections due to defective CD11/CD18 integrin function on leukocytes. Studies using CD18-/- mice reveal tissue-specific requirements for neutrophil emigration in skin, lungs, and peritoneum (Mizgerd et al., 1997; 7116 citations). Research compares β2-integrin roles across inflammatory models.
Why It Matters
CD18-deficient models demonstrate near-normal neutrophil emigration in lungs but severe defects in skin and peritoneum, guiding integrin-targeted therapies for COPD and psoriasis (Mizgerd et al., 1997). Frangogiannis (2002) links adhesion defects to poor cardiac repair post-myocardial infarction, informing anti-inflammatory strategies (1979 citations). Luster et al. (2005) identify CD11/CD18 as therapeutic targets for immune cell migration in inflammation (1336 citations).
Key Research Challenges
Tissue-specific integrin requirements
Neutrophil emigration varies by organ in CD18-/- mice, with lungs requiring less CD11/CD18 than skin or peritoneum (Mizgerd et al., 1997). This complicates universal therapies. Mechanisms remain unclear across disease models.
Translating mouse models to humans
CD18-/- mice show 11-fold elevated blood neutrophils, mirroring human LAD, but human trials lag (Mizgerd et al., 1997). Species differences in integrin expression hinder translation (Barczyk et al., 2009).
Targeting β2-integrins without immunosuppression
Blocking CD11/CD18 reduces inflammation but risks infections, as in LAD (Albelda et al., 1994). Selective modulation is needed (Luster et al., 2005).
Essential Papers
Neutrophil emigration in the skin, lungs, and peritoneum: different requirements for CD11/CD18 revealed by CD18-deficient mice.
J P Mizgerd, H Kubo, G J Kutkoski et al. · 1997 · PubMed · 7.1K citations
To determine the role of CD11/CD18 complexes in neutrophil emigration, inflammation was induced in the skin, lungs, or peritoneum of mutant mice deficient in CD18 (CD18-/- mutants). Peripheral bloo...
The inflammatory response in myocardial infarction
Nikolaos G. Frangogiannis · 2002 · Cardiovascular Research · 2.0K citations
One of the major therapeutic goals of modern cardiology is to design strategies aimed at minimizing myocardial necrosis and optimizing cardiac repair following myocardial infarction. However, a sou...
Integrins
Malgorzata Barczyk, Sergio Carracedo, Donald Gullberg · 2009 · Cell and Tissue Research · 1.4K citations
Integrins are cell adhesion receptors that are evolutionary old and that play important roles during developmental and pathological processes. The integrin family is composed of 24 alphabeta hetero...
Integrins.
Erkki Ruoslahti · 1991 · Journal of Clinical Investigation · 1.4K citations
Immune cell migration in inflammation: present and future therapeutic targets
Andrew D. Luster, R. Alon, Ulrich H. von Andrian · 2005 · Nature Immunology · 1.3K citations
The integrins
Yoshikazu Takada, Xiaojing Ye, Scott I. Simon · 2007 · Genome Biology · 1.1K citations
Neutrophils: Molecules, Functions and Pathophysiological Aspects
Véronique Witko‐Sarsat, Philippe Rieu, Béatrice Descamps‐Latscha et al. · 2000 · Laboratory Investigation · 1.1K citations
Reading Guide
Foundational Papers
Start with Mizgerd et al. (1997; 7116 citations) for CD18-/- mouse emigration data across tissues, then Ruoslahti (1991; 1384 citations) for integrin basics.
Recent Advances
Study Barczyk et al. (2009; 1427 citations) for integrin family roles; Pang et al. (2023; 1042 citations) for therapy advances.
Core Methods
Core techniques: CD18 knockout mice, inflammation induction in organs, neutrophil counting in blood/tissues (Mizgerd et al., 1997); in vitro adherence assays with HUVEC (Smith et al., 1989).
How PapersFlow Helps You Research Leukocyte Adhesion Deficiency and CD18
Discover & Search
Research Agent uses searchPapers and citationGraph on 'CD18 deficient mice neutrophil emigration' to map 7116-citation Mizgerd et al. (1997) as central node, revealing tissue-specific clusters. exaSearch uncovers related LAD human studies; findSimilarPapers links to Frangogiannis (2002) for infarction parallels.
Analyze & Verify
Analysis Agent applies readPaperContent to Mizgerd et al. (1997) abstracts, verifying 11-fold neutrophil elevation via verifyResponse (CoVe). runPythonAnalysis plots emigration data from multiple papers with pandas for statistical comparison; GRADE grades evidence strength for lung vs. skin requirements.
Synthesize & Write
Synthesis Agent detects gaps in tissue-specific CD18 data via gap detection, flagging contradictions between mouse and human LAD. Writing Agent uses latexEditText and latexSyncCitations to draft reviews citing Mizgerd (1997), with latexCompile for figures and exportMermaid for integrin adhesion cascade diagrams.
Use Cases
"Compare neutrophil counts in CD18-/- mice across tissues from Mizgerd 1997 and similar papers"
Research Agent → searchPapers + findSimilarPapers → Analysis Agent → runPythonAnalysis (pandas aggregation of counts) → matplotlib plot of 11-fold elevation in blood vs. tissue emigration deficits.
"Write LaTeX review on CD18 role in LAD inflammation models"
Synthesis Agent → gap detection on Mizgerd (1997) + Frangogiannis (2002) → Writing Agent → latexEditText (draft sections) → latexSyncCitations (7116-cite Mizgerd) → latexCompile (PDF output with diagrams).
"Find code for analyzing β2-integrin knockout data"
Research Agent → paperExtractUrls (from Barczyk 2009) → paperFindGithubRepo → githubRepoInspect → runPythonAnalysis (adapt NumPy scripts for CD18 mouse data flows).
Automated Workflows
Deep Research workflow scans 50+ CD11/CD18 papers via searchPapers → citationGraph → structured report on LAD tissues (e.g., Mizgerd 1997 centrality). DeepScan applies 7-step CoVe to verify emigration claims across Frangogiannis (2002) and Luster (2005). Theorizer generates hypotheses on integrin redundancy from CD18-/- data.
Frequently Asked Questions
What defines Leukocyte Adhesion Deficiency?
LAD results from CD18 mutations preventing β2-integrin assembly, blocking neutrophil tissue emigration (Mizgerd et al., 1997).
What methods study CD18 in inflammation?
CD18-/- knockout mice induce inflammation in skin, lungs, peritoneum to quantify emigration defects (Mizgerd et al., 1997).
What are key papers on CD18 and LAD?
Mizgerd et al. (1997; 7116 citations) shows tissue differences; Frangogiannis (2002; 1979 citations) links to infarction.
What open problems exist in CD18 research?
Unresolved tissue-specific integrin redundancies and safe therapeutic targeting without LAD-like infections (Luster et al., 2005).
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