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Correction: PHEX Mimetic (SPR4-Peptide) Corrects and Improves HYP and Wild Type Mice Energy-Metabolism

  • The PLOS ONE Staff

Figure 3 and Figure 4 are incorrect. The X-axis label should read “Fold Change” and not “% Change”. The authors have provided corrected figures below.

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Figure 3. Whole kidney gene expression (mRNA) comparisons as measured by quantitative RT/PCR (qRT-PCR) for wild type (WT) and HYP mice infused with vehicle or SPR4 peptide for 28 days.

Column headings represent; WT  =  wild type mice, HYP  =  X-linked hypophosphatemic rickets mice, SPR4  =  infused SPR4-peptide and Vehicle  =  Saline infused. For gene analysis mRNA was prepared from whole kidneys snap frozen in LN2 and homogenized. For qRT-PCR gene analysis fold differences in expression calculated by the Pfaffl method [163] were statistically analyzed for significance using the One Sample t-test and the Wilcoxon Signed rank-test with theoretical means set to 1. Results are significant (*  =  p<0.05) unless indicated by NS (see also Table 3 for detailed statistics). ND =  Not done, NS  =  Not Significant Index: Cyclophilin  =  cyclophilin; GAPDH  =  Glyceraldehyde 3-phosphate dehydrogenase; SOST  =  Sclerostin; VEGF  =  Vascular Endothelial Growth factor; 24-Hydroxylase  =  1,25-hydroxyvitamin D3 24-hydroxylase (CYP24A1); 1-á-Hydroxylase  =  25-hydroxyvitamin D3 1-alpha-hydroxylase (CYP27B1); NPT2c  =  Sodium-dependent phosphate co-transporter (Slc34a3); NPT2a  =  Sodium-dependent phosphate co-transporter (Slc34a1); NS  =  not significant; *  =  P<0.05. Histogram bars to the left of zero on the axis indicate down regulation and to the right up regulation.

https://doi.org/10.1371/journal.pone.0097326.g003

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Figure 4. Bone (femur) gene expression (mRNA) comparisons as measured by quantitative RT/PCR (qRT-PCR) for wild type (WT) and HYP mice infused with vehicle or SPR4-peptide for 28 days.

Mice were sacrificed on day 28 and femurs collected for RNA purification as described in methods. Column headings represent; WT  =  wild type mice, HYP  =  X-linked hypophosphatemic rickets mice, SPR4  =  infused SPR4-peptide and Vehicle  =  Saline infused. For gene analysis mRNA was prepared from bone marrow stromal cell “depleted” femurs as detailed in methods. For qRT-PCR gene analysis fold differences in expression calculated by the Pfaffl method [163] were statistically analyzed for significance using the One Sample t-test and the Wilcoxon Signed rank-test with theoretical means set to 1. Results are significant (* =  p<0.05) unless indicated by NS (see also Table 4 for detailed statistics). Index: FAM20C  =  Family with sequence similarity 20, member C Kinase also known as DMP4; ENPP1  =  Ectonucleotide Pyrophosphatase Phosphodiesterase 1; ESP  =  Osteotesticular protein tyrosine (OST-PTP); Plin-2  =  Perlipin-2; phosphatase; Cyclophilin  =  peptidylprolyl isomerase A (cyclophilin A); BGLAP  =  Osteocalcin or Bone Gamma-Carboxyglutamate (gla) protein; PHEX  =  Phosphate-regulating gene with Homologies to Endopeptidases on the X chromosome; GAPDH  =  Glyceraldehyde 3-phosphate dehydrogenase; VEGF  =  Vascular Endothelial Growth factor; DMP1  =  Dentin Matrix Protein 1; SOST  =  Sclerostin; MEPE  =  Matrix Extracellular Phosphoglycoprotein with ASARM -motif; FGF23  =  Fibroblast Growth Factor 23; NS  =  not significant; NA  =  not applicable, PHEX mutated in HYP; *  =  P<0.05. Histogram bars to the left of zero on the axis indicate down regulation and to the right up regulation.

https://doi.org/10.1371/journal.pone.0097326.g004

Reference

  1. 1. Zelenchuk LV, Hedge A-M, Rowe PSN (2014) PHEX Mimetic (SPR4-Peptide) Corrects and Improves HYP and Wild Type Mice Energy-Metabolism. PLoS ONE 9(5): e97326