Table 1. Primers for quantitative PCR.

Genes	Primers (5′-3′)
PAC1	F: GTGGCTGTTCTCTACTGTTTTCTGA
	R: GCTTCGCCATTTTCGCTTGATC
	Probe: TCCGCTTGTACCTCGCC
VPAC1	F: CCCCTCATCTTCAAGCTCTTCTC
	R: CAGGTGTGTCCAACCTTCGT
	Probe: CACATTGCGGCCTTGAAT
VPAC2	F: CTCTGATGTCTCTTGCAACAGGAA
	R: CAGGAACAGGTTCAGATGGATGTAA
	Probe: CCTCTTCAGGAAGCTGC
GAPDH	F: TGCACCACCAACTGCTTA
	R: CATGAGTCCTTCCACGATACCAA
	Probe: CCCTGGCCAAGGTCATCCATGA
HPRT1	F: TCCATTCCTATGACTGTAGATTTTATCAGACT
	R: AGTTGAGAGATCATCTCCTCCGATT
	Probe: CCTGTTGACTGGTCATTACA