Table I.

Primer sequences for reverse transcription-quantitative polymerase chain reaction.

Gene	Direction	Sequence
β-actin	Forward	5′-GTACGCCAACACAGTGCTG-3′
	Reverse	5′-CGTCATACTCCTGCTTGCTG-3′
Ctsk	Forward	5′-CTTCCAATACGTGCAGCAGA-3′
	Reverse	5′-TCGGTTTCTTCTCCTCTGGA-3′
Trap	Forward	5′-GCTGGAAACCATGATCACCT-3′
	Reverse	5′-GAGTTGCCACACAGCATCAC-3′
Nfatc1	Forward	5′-TGGAGAAGCAGAGCACAGAC-3′
	Reverse	5′-GCGGAAAGGTGGTATCTCAA-3′

Trap, tartrate-resistant acid phosphatase; Ctsk, cathepsin K; Nfatc1, nuclear factor of activated T cells 1.