Figure 4.
No expression of Ndrg1-CreERT2 in the parathyroid glands. (a) Cre expression study in the parathyroid glands of Ndrg1-CreERT2;tdTomato mice at 3 weeks after tamoxifen treatment. Parathyroid sections were immunostained for parathyroid hormone (PTH, green) and RFP (red), and counterstained for cell nuclei with DAPI (blue). Cre was not expressed in PTH-positive parathyroid cells. (b) αKlotho expression study in the parathyroid glands of Ndrg1-CreERT2;αKlothoflox/flox mice and αKlothoflox/flox control mice at 3 weeks after tamoxifen treatment. Parathyroid sections were immunostained for αKlotho (red) and PTH (green), and counterstained for cell nuclei with DAPI (blue). αKlotho was expressed equally in PTH-positive parathyroid cells of both mouse strains. Scale bars: 50 μm.