. "Any process that stops, prevents, or reduces the frequency, rate, or extent of production of transforming growth factor-beta3." . . . "negative regulation of transforming growth factor beta3 production" . "down regulation of transforming growth factor-beta3 production" . "down-regulation of transforming growth factor-beta3 production" . "downregulation of transforming growth factor-beta3 production" . "inhibition of transforming growth factor-beta3 production" . "negative regulation of TGF-B3 production" . "negative regulation of TGFB3 production" . "negative regulation of transforming growth factor-beta3 production" . . .