Table II.

Primer sequences used in quantitative polymerase chain reaction.

Primer	Primer sequences (5′-3′)
PD-1
Forward	AAGCTTATGTGGGTCCGGC
Reverse	GGATCCTCAAAGAGGCC
EP1
Forward	TCGCTTCGGCCTCCACCTTCTTTG
Reverse	CGTTGGGCCTCTGGTTGTGCTTAG
EP2
Forward	CCACGATGCTCCTGCTGCTT
Reverse	TCCACAAAGGTCAGTCTGTTT
EP3
Forward	CGGGGCTACGGAGGGGATGC
Reverse	ATGGCGCTGGCGATGAACAACGAG
EP4
Forward	GGTCATCTTACTCATCGCCACCTCTC
Reverse	TCCCACTAACCTCATCCACCAACAG
GAPDH
Forward	GGTGGTCTCCTCTGACTTCAACA
Reverse	GTGGTCGTTGAGGGCAATG

PD-1, programmed cell death 1; EP, prostaglandin E receptor.