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Updated: Aug 29, 2025

PCR Mutagenesis, Cloning, Expression, Fast Protein Purification Protocols and Crystallization of the Wild Type and Mutant Forms of Tryptophan Synthase
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PCR Mutagenesis, Cloning, Expression, Fast Protein Purification Protocols and Crystallization of the Wild Type and Mutant Forms of Tryptophan Synthase

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Tryptase in type I hypersensitivity.

Moïse Michel1, Caroline Klingebiel2, Joana Vitte3

  • 1Immunology Laboratory, Centre Hospitalier Universitaire Nîmes, Nîmes, France; Microbes, Evolution, Phylogénie et Infection (MEPHI), Aix-Marseille University, Marseille, France.

Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

Tryptase, a mast cell biomarker, is measured in serum or plasma. Baseline tryptase indicates mast cell levels, while acute tryptase signifies degranulation, aiding diagnosis and monitoring of mast cell disorders.

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Area of Science:

  • Clinical Chemistry
  • Immunology
  • Hematology

Background:

  • Tryptase is the primary biomarker for mast cells in clinical practice.
  • It is quantified in serum or plasma for diagnosing and managing mast cell-related conditions.
  • Mast cells continuously secrete protryptases, establishing a baseline tryptase level.

Purpose of the Study:

  • To elucidate the diagnostic and prognostic significance of baseline and acute tryptase.
  • To clarify the clinical application of tryptase as a mast cell biomarker.
  • To establish the relationship between baseline and acute tryptase measurements.

Main Methods:

  • Quantitative determination of tryptase levels in serum or plasma.
  • Analysis of tryptase secretion patterns: constitutive and activation-induced.
  • Correlation of tryptase levels with mast cell activity and degranulation.

Main Results:

  • Baseline tryptase reflects mast cell number and activity.
  • Acute tryptase indicates mast cell degranulation.
  • A delay of 15-20 minutes and a peak at 1 hour are observed for acute tryptase release.
  • Clinical application of tryptase as a biomarker has been clarified since 2020.

Conclusions:

  • Tryptase serves as a crucial biomarker for mast cell disorders.
  • Distinguishing between baseline and acute tryptase is essential for accurate clinical interpretation.
  • Establishing reference values for baseline tryptase and understanding its relation to acute measurements are key for effective clinical use.