Data/hora: 01/06/2024 01:27:00

Provedor de dados: 	56	
País: 	Brazil	
Título: 	A mathematical framework for group analysis of von Willebrand factor multimeric composition following luminography	
Autores: 	Lopes,A.A.; Soares,R.P.S.; Maeda,N.Y.	
Data: 	2002-11-01	
Ano: 	2002	
Palavras-chave: 	Von Willebrand factor; Luminography; Densitometry; Curve fitting; Pulmonary hypertension.	
Resumo: 	The objective of the present study was to establish a method for quantitative analysis of von Willebrand factor (vWF) multimeric composition using a mathematical framework based on curve fitting. Plasma vWF multimers from 15 healthy subjects and 13 patients with advanced pulmonary vascular disease were analyzed by Western immunoblotting followed by luminography. Quantitative analysis of luminographs was carried out by calculating the relative densities of low, intermediate and high molecular weight fractions using laser densitometry. For each densitometric peak (representing a given fraction of vWF multimers) a mean area value was obtained using data from all group subjects (patients and normal individuals) and plotted against the distance between the peak and IgM (950 kDa). Curves were constructed for each group using nonlinear fitting. Results indicated that highly accurate curves could be obtained for healthy controls and patients, with respective coefficients of determination (r²) of 0.9898 and 0.9778. Differences were observed between patients and normal subjects regarding curve shape, coefficients and the region of highest protein concentration. We conclude that the method provides accurate quantitative information on the composition of vWF multimers and may be useful for comparisons between groups and possibly treatments.	
Tipo: 	Info:eu-repo/semantics/other	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002001100002	
Editor: 	Associação Brasileira de Divulgação Científica	
Relação: 	10.1590/S0100-879X2002001100002	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Medical and Biological Research  v.35 n.11 2002	
Fonte: 	info:eu-repo/semantics/openAccess