intact fgf23 enzyme linked immunosorbent assay  (Quidel)

Journal: Kidney Medicine

Article Title: A Large Deletion With a Large Impact: Homozygous 5,600 bp Deletion of the GALNT3 Gene Causing Hyperphosphatemic Tumoral Calcinosis

doi: 10.1016/j.xkme.2026.101241

Figure Lengend Snippet: Impact of GalNAc-T3 enzyme dysfunction; normal situation (left), deletion leading to GalNAc-T3 dysfunction (right). FGF-23, fibroblast growth factor 23; FGFR, fibroblast growth factor receptor.

Article Snippet: Intact FGF23 was measured with the human intact FGF23 enzyme-linked immunosorbent assay (#60-6600, Lot 173373, Quidel Corporation) according to the manufacturer’s protocol.

Techniques:

Journal: American Journal of Epidemiology

Article Title: STABILITY OF SERUM BONE-MINERAL, KIDNEY, AND CARDIAC BIOMARKERS AFTER A FREEZE-THAW CYCLE: THE ARIC STUDY

doi: 10.1093/aje/kwab251

Figure Lengend Snippet: Summary Statistics of Serum Analytes Before and After Freeze-Thaw Process, Atherosclerosis Risk in Communities, United States, Using Samples Collected in 1990–1992

Article Snippet: All paired (i.e., before and after freeze-thaw) samples were measured in the same assay batch using the following methods: a 2-site enzyme-linked immunosorbent assay for intact FGF23 (Kainos, Atlanta, Georgia; laboratory interassay coefficient of variation (CV), 8.1%), a sandwich immunoassay method for intact PTH (Roche, Indianapolis, Indiana; laboratory interassay CV, 5.8%), colorimetric methods for calcium and phosphorus (laboratory interassay CVs, 1.3%–1.9%), liquid chromatography and mass spectrometry for 25(OH)D as the sum of D2 and D3 (laboratory interassay CVs, 7.5% for D2 and 5.4% for D3), a bromecresol purple method for albumin (Roche; laboratory interassay CV, 2.6%), an enzymatic method for creatinine (Roche; laboratory interassay CV, 2.9%), gentian immunoassay for cystatin C (Gentian, Moss, Norway; laboratory interassay CV, 4.3%), Gen 5 STAT for hs-cTnT (Roche; laboratory interassay CV, 3.7%), and an Elecsys proBNP II immunoassay for NT-proBNP (Roche; laboratory interassay CV, 2.6%).

Techniques: Biomarker Discovery

Journal: American Journal of Epidemiology

Article Title: STABILITY OF SERUM BONE-MINERAL, KIDNEY, AND CARDIAC BIOMARKERS AFTER A FREEZE-THAW CYCLE: THE ARIC STUDY

doi: 10.1093/aje/kwab251

Figure Lengend Snippet: Scatter plots for serum concentrations before and after freeze-thaw cycle, using samples from Atherosclerosis Risk in Communities, United States,1990–1992. A) Fibroblast growth factor 23 (FGF23); B) parathyroid hormone (PTH); C) calcium; D) phosphorus; E) 25-hydroxyvitamin D (25(OH)D); F) albumin; G) creatinine; H) cystatin C; I) high-sensitivity cardiac troponin T (hs-cTnT); J) N-terminal pro B-type natriuretic peptide (NTproBNP).

Article Snippet: All paired (i.e., before and after freeze-thaw) samples were measured in the same assay batch using the following methods: a 2-site enzyme-linked immunosorbent assay for intact FGF23 (Kainos, Atlanta, Georgia; laboratory interassay coefficient of variation (CV), 8.1%), a sandwich immunoassay method for intact PTH (Roche, Indianapolis, Indiana; laboratory interassay CV, 5.8%), colorimetric methods for calcium and phosphorus (laboratory interassay CVs, 1.3%–1.9%), liquid chromatography and mass spectrometry for 25(OH)D as the sum of D2 and D3 (laboratory interassay CVs, 7.5% for D2 and 5.4% for D3), a bromecresol purple method for albumin (Roche; laboratory interassay CV, 2.6%), an enzymatic method for creatinine (Roche; laboratory interassay CV, 2.9%), gentian immunoassay for cystatin C (Gentian, Moss, Norway; laboratory interassay CV, 4.3%), Gen 5 STAT for hs-cTnT (Roche; laboratory interassay CV, 3.7%), and an Elecsys proBNP II immunoassay for NT-proBNP (Roche; laboratory interassay CV, 2.6%).

Techniques: