Cited by 51Mast cells and histamineFood Allergy and Anaphylaxis ResearchPlatelet Disorders and Treatments

The DOI matches its Crossref record; 207 of the 207 references it cites were found in a registry or an index.

Genetic Regulation of Tryptase Production and Clinical Impact: Hereditary Alpha Tryptasemia, Mastocytosis and Beyond

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Abstract

Tryptase is a serine protease that is predominantly produced by tissue mast cells (MCs) and stored in secretory granules together with other pre-formed mediators. MC activation, degranulation and mediator release contribute to various immunological processes, but also to several specific diseases, such as IgE-dependent allergies and clonal MC disorders. Biologically active tryptase tetramers primarily derive from the two genes TPSB2 (encoding β-tryptase) and TPSAB1 (encoding either α- or β-tryptase). Based on the most common gene copy numbers, three genotypes, 0α:4β, 1α:3β and 2α:2β, were defined as “canonical”. About 4–6% of the general population carry germline TPSAB1-α copy number gains (2α:3β, 3α:2β or more α-extra-copies), resulting in elevated basal serum tryptase levels. This condition has recently been termed hereditary alpha tryptasemia (HαT). Although many carriers of HαT appear to be asymptomatic, a number of more or less specific symptoms have been associated with HαT. Recent studies have revealed a significantly higher HαT prevalence in patients with systemic mastocytosis (SM) and an association with concomitant severe Hymenoptera venom-induced anaphylaxis. Moreover, HαT seems to be more common in idiopathic anaphylaxis and MC activation syndromes (MCAS). Therefore, TPSAB1 genotyping should be included in the diagnostic algorithm in patients with symptomatic SM, severe anaphylaxis or MCAS.

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Figure 1 Canonical genotypes (wildtype) of α - and β-tryptase derived by TPSAB1 and TPSB2 copy number state, and (most common) genotypes of HαT (hereditary alpha tryptasemia) with additional TPSAB1 α-copies.
Figure 1 Canonical genotypes (wildtype) of α - and β-tryptase derived by TPSAB1 and TPSB2 copy number state, and (most common) genotypes of HαT (hereditary alpha tryptasemia) with additional TPSAB1 α-copies.CC BY · PubMed Central

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Metadata

Authors
Sprinzl, B., Greiner, G., Uyanik, G., Arock, M., Haferlach, T., Sperr, W. R., Valent, P., & Hoermann, G.
Affiliations
  • Hanusch Hospital (AT)
  • Ludwig Boltzmann Institute for Hematology and Oncology (AT)
  • Sigmund Freud Privatuniversität Wien (AT)
  • Inserm (FR)
  • Munich Leukemia Laboratory (Germany) (DE)
Corresponding author
Hoermann, Gregor
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2021-02-28
Volume
22
Issue
5
Pages
2458
ISSN
1422-0067 (ISSN-L)
OpenAlex
W3133988438
Cited by
51
References
207
Citations by year
2026: 8 · 2025: 11 · 2024: 11 · 2023: 7 · 2022: 13 · 2021: 1
FWCI
0.82
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Austrian Science Fund (P26079-B13, P32470-684 B, F4701-B20, F4704-B20)
  • Medical-Scientific Fund of the Mayor of Vienna (19019)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Mast cells and histamine
  • Health Sciences › Medicine › Immunology and Allergy › Food Allergy and Anaphylaxis Research
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
Keywords
tryptase, hereditary alpha-tryptasemia, TPSAB1, mast cells, systemic mastocytosis, idiopathic anaphylaxis, mast cell activation syndrome, gene copy number, genetic control, serum tryptase
MeSH terms
Animals, Humans, Mast Cells, Mastocytosis, Gene Expression Regulation, Enzymologic, Genetic Diseases, Inborn, Tryptases

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