Cited by 73Mast cells and histamineGastrointestinal Tumor Research and TreatmentGastrointestinal motility and disorders

Multiple novel alterations in Kit tyrosine kinase in patients with gastrointestinally pronounced systemic mast cell activation disorder

Molderings, Gerhard J., Kolck, Ulrich W., Scheurlen, Christian, Brüss, Michael, Homann, Jürgen, Von Kügelgen, Ivar·2007·Scandinavian Journal of Gastroenterology

Abstract

OBJECTIVE: Sequencing efforts to discover mutations in the tyrosine kinase Kit related to systemic mast cell disorders have so far been focused mainly on only a few of the 21 exons of the encoding gene c-kit, thus considerably limiting the possibility to quantitatively reveal pathogenetic relationships. The purpose of this study was to analyze and compare the total sequence of Kit tyrosine kinase at the level of the mRNAs obtained from patients with clear systemic signs of a pathologically increased mast cell mediator release and those from healthy volunteers. MATERIAL AND METHODS: Kit encoding mRNA isolated from mast cell progenitors in peripheral blood from 17 patients with a mast cell activation disorder and from 5 healthy volunteers as well as from the human mast cell leukemia cell line HMC1 was analyzed for alterations. RESULTS: Multiple novel point mutations and six isoforms of Kit which are due to alternative mRNA splicing were detected. One isoform, the insertion of a glutamine residue at amino acid position 252, was found to be a new splice variant expressed in all patients but in none of the healthy volunteers. CONCLUSIONS: Systemic mast cell activation disorder was pathogenetically characterized by two or more alterations in the Kit tyrosine kinase providing not only a means of confirming the diagnosis, but also of assessing prognosis and of starting adequate therapeutic interventions. The insertion of Q252 appears to be pathognomic for that disease, providing a novel means for the identification of chronic non-specific gastrointestinal symptoms as manifestations of a systemic mast cell activation disorder.

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Crossref · 10.1080/00365520701245744

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  • Preliminary research strongly suggests that idiopathic MCAS is almost always driven by one or another somatic mutational profile in KIT and other MC regulatory elements.

    “preliminary research [15][16][17] strongly suggests is almost always driven by one (largely MC-restricted, largely somatic) mutational profile or another among a very large menagerie of such profiles in KIT and other MC regulatory elements”

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Authors
Molderings, G. J., Kolck, U. W., Scheurlen, C., Brüss, M., Homann, J., & Von Kügelgen, I.
Affiliations
University Hospital Bonn (DE)
Corresponding author
Molderings, Gerhard J.
Venue
Scandinavian Journal of Gastroenterology
Published
2007-01
Volume
42
Issue
9
Pages
1045-1053
ISSN
  • 0036-5521 (ISSN-L)
  • 1502-7708
OpenAlex
W2130898095
Cited by
73
References
47
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 5 · 2015: 4 · 2014: 6 · 2013: 7 · 2012: 6
FWCI
1.59
Type
journal article
Language
en
Open access
closed
Locations
  • Scandinavian Journal of Gastroenterology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Krebshilfe
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Mast cells and histamine
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal Tumor Research and Treatment
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
CD117, KIT tyrosine kinase, mast cell activation, point mutations, alternative mRNA splicing, splice variants, mast cell progenitors, gastrointestinal symptoms, mast cell mediator release, diagnosis and prognosis
MeSH terms
Adult, Aged, Female, Gastrointestinal Diseases, Humans, Male, Mastocytosis, Middle Aged, RNA Splicing, Syndrome, Point Mutation, Proto-Oncogene Proteins c-kit

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