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Basophil Activation Test for Allergy Diagnosis
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Basophil Activation Test for Allergy Diagnosis

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Modulation of mTOR effector phosphoproteins in blood basophils from allergic patients

Yael Gernez1, Rabindra Tirouvanziam, Neha Reshamwala

  • 1Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.

Journal of Clinical Immunology
|February 22, 2012
PubMed

Insights

The mammalian target of rapamycin (mTOR) pathway is involved in allergic reactions. In nut allergy patients, mTOR signaling in basophils increases upon allergen exposure, suggesting a role in immune responses.

Area of Science:

  • Immunology
  • Cellular Biology
  • Allergy Research

Background:

  • The mammalian target of rapamycin (mTOR) pathway is implicated in immunoinflammatory processes.
  • The specific role of the mTOR pathway in basophil responses during allergic reactions is not well understood.

Purpose of the Study:

  • To investigate the involvement of the mTOR pathway in basophil activation in patients with nut allergy.
  • To quantify key mTOR effector phosphoproteins in basophils from nut allergy patients and healthy controls.

Main Methods:

  • Quantification of phosphorylated eukaryotic initiation factor 4E (peIF4E) and S6 ribosomal protein (pS6rp) in blood basophils.
  • Basophil stimulation with offending (nut) and non-offending (chicken/rice) allergen extracts.
  • Measurement of basophil activation markers (CD203c, CD63).
  • Inhibition of the mTOR pathway using rapamycin.

Main Results:

  • Basophil peIF4E levels were elevated in nut allergy patients compared to controls even without stimulation.
  • Nut extract stimulation increased peIF4E and pS6rp levels in basophils of nut allergy patients, correlating with increased CD203c and CD63 expression.
  • Rapamycin treatment reduced pS6rp and CD203c responses in stimulated basophils from nut allergy patients.

Conclusions:

  • Basophil activation in response to specific allergens involves the modulation of mTOR effector phosphoproteins.
  • The mTOR pathway plays a significant role in basophil responses during nut allergy.
  • These findings highlight potential therapeutic targets within the mTOR pathway for managing allergic diseases.

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