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Updated: Jun 25, 2026

Rapid Quantification of Mitogen-induced Blastogenesis in T Lymphocytes for Identifying Immunomodulatory Drugs
Published on: December 27, 2016
Bimatoprost-induced calcium signaling in human T-cells does not involve prostanoid FP or TP receptors
June Chen1, Ryan Ta Lu, Ronald Lai
1Department of Biological Sciences, Allergan, Inc., Irvine, California 92612, USA. chen_june@allergan.com
Purpose:
The prostamide bimatoprost and prostanoid FP receptor agonists are highly efficacious drugs for glaucoma treatment. The presence of both prostamide and prostanoid FP receptors in bimatoprost-sensitive preparations has made prostamide receptor classification difficult. This study investigated a novel bimatoprost-sensitive preparation.
Methods:
Human peripheral blood T lymphoblasts (Molt-3) and human osteoblasts (hFOB) were cultured for intracellular calcium signaling studies and quantitative real-time PCR analysis of RNA.
Results:
Bimatoprost stimulated concentration-related increases in [Ca(2 +)](i) in a human T-cell line that does not express human FP receptor/variants, according to PCR analysis. The calcium signal induced by bimatoprost was not antagonized by prostanoid FP receptor antagonist/partial agonist AL-8810 or selective TP receptor antagonist SQ 29548. Conversely, bimatoprost did not elevate [Ca(2 +)](i) in human osteoblasts, which were confirmed to contain RNA of human FP receptor/variants.
Conclusions:
Molt-3 cells have been identified as a bimatoprost-sensitive preparation in which the activity of bimatoprost is independent of prostanoid FP receptors.
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