4alpha-Phorbol 12-myristate 13-acetate is a non-tumor promoting phorbol ester derivative that has been used as a negative control for PMA, a tumor promoter and activator of PKC. However, 4α-PMA has also been shown to be a reasonably potent activator of TRPV4 channels, making it a useful tool for structure-activity investigations via comparison to the very similar compound, 4α-PDD, which demonstrates 50 times more affinity for TRPV4. Furthermore, this compound has also been shown to increase PGHS-2 mRNA significantly in murine keratinocytes.
R.A.Nichols; J.W.Haycock; J.K.Wang; P.Greengard. Phorbol ester enhancement of neurotransmitter release from rat brain synaptosomes. Journal of Neurochemistry. 1987, 48,(2), 615-621.
S.M.Fischer; K.E.Patrick; M.L.Lee; G.S.Cameron. 4 Beta- and 4 alpha-12-O-tetradecanoylphorbol-13-acetate elicit arachidonate release from epidermal cells through different mechanisms. Cancer Research. 1991, 51,(3), 850-856.