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Updated: Jul 5, 2026

Spheroid Assay to Measure TGF-β-induced Invasion
Published on: November 16, 2011
Measurement of TGF-beta in biological fluids
H Hale-Donze1, S M Wahl, R J Jackson
1National Institute of Dental and Craniofacial Research, Bethesda, Maryland, USA.
Abstract:
Transforming growth factor (TGF-beta) is an immunoregulatory cytokine produced by many different cell types, including lymphocytes and monocytes-macrophages. Two assays are described for the quantitation of TGF-beta activity in supernatant fluids. The bioassay for TGF-beta is based on the potent ability of TGF-beta to suppress lymphocyte proliferation. The radioreceptor assay is based on the ability of TGF-beta-containing supernatant fluids to inhibit the binding of radiolabeled TGF-beta to its cellular receptor. Two support protocols describe acid-activation and neutralization of TGF-beta.
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