SST	somatostatin
PACAP	pituitary adenylate cyclase-activating polypeptide
INL	inner nuclear layer
GCL	ganglion cell layer
VEGF	vascular endothelial growth factor
IPL	inner plexiform layer
OCT	octreotide
TH	tyrosine hydroxylase
cAMP	cyclic adenosine monophosphate
CREB	cAMP response element-binding protein
p38 MAPK	p38 mitogen-activated protein kinases
ERK	extracellular-signal-regulated kinase
PKC	protein kinase C