ArticleMethods in molecular biology (Clifton, N.J.)2022
Quantitative Imaging of Retinoic Acid Activities in Living Mammalian Cells.
Article in Methods in molecular biology (Clifton, N.J.), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors at 2 institutions in 2 countries.
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Abstract
Retinoic acid (RA) is an intriguing metabolite that is necessary for embryonic development and differentiation in vertebrates. The present protocol demonstrates how to image RA activities indirectly in mammalian cells with ligand-activatable single-chain bioluminescence (BL) probes. We introduce 13 different molecular designs for characterizing an efficient single-chain probe that quantitatively visualizes RA activities with significant sensitivity. The key components included in the probes are (i) the N- and C-terminal fragments of artificial luciferase 16 (ALuc16), (ii) the ligand-binding domain of human retinoic acid receptor α (RAR LBD), and (iii) an LXXLL motif derived from common coactivators of nuclear receptors. The probe is highly selective and sensitive to all-trans-RA (at-RA) in animal cells. This protocol exemplifies quantitative imaging of the RA levels in serum and cerebrospinal fluid with a linear range in two orders. The present protocol is an important addition to conventional techniques on quantitative imaging of endogenous at-RA levels in live mammalian cells.
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