Hymenoptera venom-induced anaphylaxis and hereditary alpha-tryptasemia
Open accessAbstract
Purpose of review: To discuss the association between the common dominantly inherited genetic trait hereditary alpha-tryptasemia (HαT) and hymenoptera venom-induced anaphylaxis (HVA). Recent findings: Elevated BST has been correlated with more severe systemic anaphylaxis in humans in a number of settings – most notably in HVA. Clonal mast cell disease, in particular, systemic mastocytosis, is frequently associated with elevated BST, and is a major risk factor for severe HVA. However, clonal mast cell diseases are believed to be rare, whereas HVA is relatively more common. HαT affects an estimated 3–5% of Western populations and is the common cause for elevated BST in these individuals. An association between HαT and severe HVA, as well as clonal mast cell disease has recently been demonstrated wherein this trait modifies reaction severity in venom allergic individuals. A mechanism underlying this association has been proposed through the identification of naturally occurring heterotetrameric tryptases and characterization of their unique physical attributes. Summary: Here we discuss the long-standing association between elevated BST and HVA severity, how HαT fits into this landscape, and review the clinical and mechanistic evidence that supports HαT as a modifier of HVA.
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Various clinical conditions, including dysautonomia with postural orthostatic hypotension, flushing, gastrointestinal hypomotility, joint hypermobility, vibratory urticaria, irritable bowel syndrome, chronic musculoskeletal pain, retained primary dentition, and allergic disorders, were initially reported in patients with hereditary alpha-tryptasemia.
“Initially, various clinical conditions, including dysautonomia with postural orthostatic hypotension, fl ushing, gastrointestinal hypomotility, joint hypermobility, vibratory urticaria, irritable bowel syndrome, chronic musculoskeletal pain, retained primary dentition, and allergic disorders, were reported in patients with H a T. 120,121,125-127”
From Selecting the Right Criteria and Proper Classification to Diagnose Mast Cell Activation Syndromes: A Critical Review (2021) · cites this paper as [127]
The section “Hereditary alpha-tryptasemia (HαT) is a common genetic trait” (page not provided) reports IBS-like symptoms, flushing, retained primary dentition, body pain, joint hypermobility, and hypersensitivity reactions in association with HαT. The mechanisms section also describes vibration-triggered hives in some patients, but the copy does not report dysautonomia with postural orthostatic hypotension or gastrointestinal hypomotility. It distinguishes vibratory urticaria from the vibration-triggered symptoms reported in HαT. (LLM, conf=0.87)
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“However, an approximately two to three times higher prevalence of HaT has been reported in two large cohorts of SM patients25,129; also, HaT concurrently occurring with MCAS has been reported.130,131 Therefore, more research is warranted to understand the relationship between HaT and MCAS.”
BackgroundInfluentialSelf-citationClinical relevance of inherited genetic differences in human tryptases
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Self-citationAnaphylaxis and Mast Cell Disorders
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Alpha-tryptase as a risk-modifying factor for mast cell–mediated reactions
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Self-citationDefining hereditary alpha-tryptasemia as a risk/modifying factor for anaphylaxis: Are we there yet?
Couto, M. L., Silva, M., Barbosa, M. J., Ferreira, F., Fragoso, A. S., & Azenha Rama, T. (2023) · European Annals of Allergy and Clinical Immunology · doi:10.23822/eurannaci.1764-1489.288 · Cited by 10 · see citing works
- Authors
- O’Connell, M. P., & Lyons, J. J.
- Affiliations
- National Institutes of Health (US)
- Corresponding author
- Lyons, Jonathan J.
- Venue
- Current Opinion in Allergy & Clinical Immunology
- Published
- 2020-08-06
- Volume
- 20
- Issue
- 5
- Pages
- 431-437
- ISSN
- 1473-6322 (ISSN-L)
- 1528-4050
- PMC
- PMC8162786
- OpenAlex
- W3048000325
- Cited by
- 53
- References
- 9
- Citations by year
- 2026: 5 · 2025: 10 · 2024: 9 · 2023: 8 · 2022: 7 · 2021: 13 · 2020: 1
- FWCI
- 0.71
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Current Opinion in Allergy and Clinical Immunology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (Z99 AI999999)
- National Institute of Allergy and Infectious Diseases (ZIAAI001192)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Mast cells and histamine
- Health Sciences › Medicine › Immunology and Allergy › Food Allergy and Anaphylaxis Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Venomous Animal Envenomation and Studies
- Keywords
- hereditary alpha-tryptasemia, basophils, tryptase, systemic mastocytosis, venom allergy, anaphylaxis severity, genetic modifiers
- MeSH terms
- Anaphylaxis, Animals, Arthropod Venoms, Humans, Hymenoptera, Insect Bites and Stings, Mast Cells, Severity of Illness Index, Genetic Diseases, Inborn, Mastocytosis, Systemic, Tryptases
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