reverse manner
4.Semi-quantitative reverse transcription-polymerase chain reaction(RT-PCR)examination indicated the expression of OPG and RANKL at messenger RNA(mRNA)level in hPDLCs. Results OPG mRNA expression was down-regulated, RANKL mRNA expression was up-regulated, and the ratio of OPG/RANKL was decreased by 1α,25(OH) 2vitD 3 in a time dependent manner.

