Volume 74, Issue 5, Pages 566-570 (September 2008) Does Fgf23–klotho activity influence vascular and soft tissue calcification through regulating mineral ion metabolism?  Fahad Memon, Mohga El-Abbadi, Teruyo Nakatani, Takashi Taguchi, Beate Lanske, M. Shawkat Razzaque  Kidney International  Volume 74, Issue 5, Pages 566-570 (September 2008) DOI: 10.1038/ki.2008.218 Copyright © 2008 International Society of Nephrology Terms and Conditions

Figure 1 Expression of NaPi2a. Immunostaining of NaPi2a protein in kidneys obtained from control (a), Fgf23 −/− (b), and klotho −/− (c) mice. An increased expression of NaPi2a protein is detected in Fgf23 −/− and klotho −/− mice, compared with wild-type mice. Please note that NaPi2a protein is exclusively present in the luminal side of the proximal tubular epithelial cells. Kidney International 2008 74, 566-570DOI: (10.1038/ki.2008.218) Copyright © 2008 International Society of Nephrology Terms and Conditions

Figure 2 Soft tissue and vascular calcification in Fgf23 −/− mice. von Kossa staining on paraffin sections of the kidney (a, b) and lung (c, d), showing widespread renal (b) and pulmonary (d) calcifications in Fgf23 −/− mice. No such calcification is noted in the wild-type littermates (a, c). Arrows depict the calcified vessels in the kidney and lung of the Fgf23 −/− mice (original magnification: kidney, × 20; lung, × 10). Kidney International 2008 74, 566-570DOI: (10.1038/ki.2008.218) Copyright © 2008 International Society of Nephrology Terms and Conditions