ArticleThe Journal of biological chemistry2011
Mas-related gene X2 (MrgX2) is a novel G protein-coupled receptor for the antimicrobial peptide LL-37 in human mast cells: resistance to receptor phosphorylation, desensitization, and internalization.
Article in The Journal of biological chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 134 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
134 citing papers in PubMed, 229 citations in OpenAlex.
- Apoptosis Modulation by LL-37: From Mitochondrial Cell Death to Prosurvival Signaling.International journal of molecular sciences · 2026Review
- Neurogenic Rosacea and Facial Dysesthesia: Neurovascular-Immune Mechanisms and Translational Therapeutic Perspectives.Medicina (Kaunas, Lithuania) · 2026Review
- Proadrenomedullin N-Terminal 20 Peptide (PAMP) Increases Proliferation and Induces Cytoskeleton Remodeling in Melanoma Cells Through the CXCR7/CXCR4/β-Arrestin Axis.Molecules (Basel, Switzerland) · 2026Article
- International Union of Basic and Clinical Pharmacology. CXXII. Applying an objective evaluation to the status of class A orphan G protein-coupled receptors.Pharmacological reviews · 2026Review
- Structural determinants of ligand response specificity in the mast cell activating GPCR, MRGPRX2.The Journal of biological chemistry · 2026Article
- Direct protamine activation of human mast cells is MRGPRX2-dependent and is modulated by heparin.The Journal of pharmacology and experimental therapeutics · 2026Article
- Mast cell specific receptor Mrgprb2/X2 regulates bladder immunity during urinary tract infections.Research square · 2026Article
- Immunomodulatory activities of bovine host defense peptides (HDPs): context-dependent roles in inflammation and immune priming.BMC veterinary research · 2026Article
- LL-37-MRGPRX2-Mast Cell Signaling in Rosacea: Current Evidence and Directions for Human Studies.Clinical, cosmetic and investigational dermatology · 2026Review
- The association between atopic dermatitis and rosacea: a comprehensive review from comorbidities to pathogenic mechanisms.Frontiers in immunology · 2026Review
- Modulation of Mast Cell Activation via MRGPRX2 by Natural Oat Extract.International journal of molecular sciences · 2025Article
- Therapeutic effect of an MRGPRX2/MRGPRB2 antagonist on LL-37-induced rosacea-like inflammation in mice.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2025Article
- Mutations ofThe journal of allergy and clinical immunology. Global · 2025Review
- The Anti-Angiogenic Effect of Microbotox on Rosacea Is Due to the Suppressed Secretion of VEGF by Mast Cells Resulting From Internalization of the MRGPRX2 Receptor.Annals of dermatology · 2025Article
- Synthetic peptides targeting a mast cell-specific G protein-coupled receptor MRGPRB2 display anti-infective potential.Cell biomaterials · 2025Article
- Aberrant Activation of Mast Cells: Molecular Mechanisms and Targets for Intervention.Clinical reviews in allergy & immunology · 2025Review
- Antimicrobial Peptide Signaling in Skin Diseases.JID innovations : skin science from molecules to population health · 2025Review
- Subnanomolar MAS-related G protein-coupled receptor-X2/B2 antagonists with efficacy in human mast cells and disease models.Signal transduction and targeted therapy · 2025Article
- Beyond the classic players: Mas-related G protein-coupled receptor member X2 role in pruritus and skin diseases.Journal of the European Academy of Dermatology and Venereology : JEADV · 2025Review
- Human antimicrobial/host defense peptide LL-37 may prevent the spread of a local infection through multiple mechanisms: an update.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2025Review
74 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 1 institution in 1 country.
Funding
Abstract
Human LL-37 is a multifunctional antimicrobial peptide that promotes inflammation, angiogenesis, wound healing, and tumor metastasis. Most effects of LL-37 are mediated via the activation of the cell surface G protein-coupled receptor FPR2 on leukocytes and endothelial cells. Although LL-37 induces chemotaxis, degranulation, and chemokine production in mast cells, the receptor involved and the mechanism of its regulation remain unknown. MrgX2 is a member of Mas-related genes that is primarily expressed in human dorsal root ganglia and mast cells. We found that a human mast cell line LAD2 and CD34(+) cell-derived primary mast cells, which natively express MrgX2, responded to LL-37 for sustained Ca(2+) mobilization and substantial degranulation. However, an immature human mast cell line, HMC-1, that lacks functional MrgX2 did not respond to LL-37. shRNA-mediated knockdown of MrgX2 in LAD2 mast cell line and primary CD34(+) cell-derived mast cells caused a substantial reduction in LL-37-induced degranulation. Furthermore, mast cell lines stably expressing MrgX2 responded to LL-37 for chemotaxis, degranulation, and CCL4 production. Surprisingly, MrgX2 was resistant to LL-37-induced phosphorylation, desensitization, and internalization. In addition, shRNA-mediated knockdown of the G protein-coupled receptor kinases (GRK2 and GRK3) had no effect on LL-37-induced mast cell degranulation. This study identified MrgX2 as a novel G protein-coupled receptor for the antibacterial peptide LL-37 and demonstrated that unlike most G protein-coupled receptors it is resistant to agonist-induced receptor phosphorylation, desensitization, and internalization.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.