Injected miR-200b precursor can be converted to mature miR-200b in kidneys.

<p><b>a</b>. Laser microscopy images of kidney, frozen sections at 24 hr after intravenously administration of Cy3 dye-labeled Pre-miR control. <b>b</b>. Changes in miR-200 family levels in Balbc mice kidneys 12, 24, 48 hours after intravenously administration of miR-200b precursor, as measured by <i>TaqMan</i> qRT-PCR and normalized to U6 expression. The data are means from experiment measured in triplicate and are presented as mean±S.E. <i>P</i><0.05: kidneys 12, 24 hours after intravenously administration of miR-200b precursor compared with 0 hour.