Treatment of Pm BM-MSC cultures with the lenti-shRNA encoding to the TL313202VD sequence at a multiplicity of infection 3 (MOI 3) transiently decreased (P < 0.05) the NTPDase3 immunoreactivity of the cells at culture day 7 (23 ± 1 a.u.)compared to the situation where the scramble sequence was used (51 ± 2 a.u.); full recovery of NTPDase3 protein amounts was observed at culture day 21 (Fig. 6A). Here, ENTPD3 is linked to infection.