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Human recombinant histamine-releasing factor

S M MacDonald1

  • 1The Johns Hopkins Asthma and Allergy Center, Department of Medicine, Baltimore, Md. 21224, USA.

International Archives of Allergy and Immunology
|May 1, 1997
PubMed
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A novel human recombinant histamine-releasing factor (HrHRF) acts as a complete secretagogue for IgE+ basophils and enhances histamine release from IgE- basophils. This cytokine also activates eosinophils, suggesting a role in allergic diseases.

Area of Science:

  • Immunology
  • Allergy Research
  • Cytokine Biology

Background:

  • Histamine-releasing factors (HRF) are crucial in allergic responses.
  • Previous HRF identification involved molecular biology techniques, yielding molecules like interleukins and chemokines.
  • The IgE-dependent HRF has been a focus of research.

Purpose of the Study:

  • To characterize a novel human recombinant HRF (HrHRF).
  • To investigate the effects of HrHRF on basophils and eosinophils.

Main Methods:

  • Utilized molecular biology techniques for HRF identification.
  • Assessed HrHRF's secretagogue activity on IgE+ and IgE- basophils.
  • Evaluated HrHRF's effect on eosinophil activation from allergic donors.

Related Experiment Videos

Main Results:

  • HrHRF is a novel cytokine with no homology to known molecules.
  • HrHRF functions as a complete secretagogue for IgE+ basophils.
  • HrHRF enhances histamine release from IgE- basophils.
  • HrHRF activates eosinophils from allergic donors.

Conclusions:

  • HrHRF exhibits unique dual activity on basophils.
  • HrHRF's ability to activate eosinophils is significant.
  • This novel cytokine may play a pivotal role in the pathogenesis of allergic diseases.