H. Kiyama et al., GROWTH-FACTORS AND EXTRACELLULAR SIGNAL-REGULATED KINASES (MITOGEN-ACTIVATED PROTEIN-KINASE) IN THE RAT PINEAL-GLAND, Neuroendocrinology, 59(2), 1994, pp. 152-155
The present study revealed that the pineal gland expressed basic fibro
blast growth factor (bFGF) and FGF-receptor 1 (FGFR1/flg), suggesting
that bFGF in the pineal gland acts in an autocrine or paracrine manner
, which is mediated by FGFR1/flg. The present study also examined gene
expression of the extracellular signal-regulated kinase (ERK) family
(ERK1-3) which may be intracellular signal mediators of growth factors
. ERK1 [mitogen-activated protein kinase (MAP-kinase)] was strongly ex
pressed throughout the pineal gland, while expression of ERK2 and ERK3
was not found. These findings suggest the presence of a signal pathwa
y from bFGF to ERK1 via FGFR1/flg in the pineal gland.