an extract of a formula used in the traditional chinese medicine (buzhong yi qi wan) alters the labeling of blood constituents with technetium-99m

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ID: 227224
2007
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Abstract
Buzhong Yi Qi Wan (Buzhong) is a medicinal herb widely used in Traditional Chinese Medicine to treat the digestive and circulatory systems. Red blood cell and plasma proteins labeled with technetium-99m (99mTc) are used in nuclear medicine. The aim of this work was to investigate the effects of an aqueous Buzhong extract on the labeling of blood constituents with 99mTc. Heparinized blood (Wistar rats) was incubated in vitro with different Buzhong extract concentrations and 99mTc-labeling was performed. Plasma (P) and blood cells (BC) were separated and soluble (SF-P, SF-BC) and insoluble (IF-P, IF-BC) fractions were isolated. The radioactivity on blood constituents was determined and the percentage of incorporated radioactivity (%ATI) was calculated. Buzhong extract at the highest concentrations used altered significantly (p<0.05) the %ATI in blood constituents. Substances present in the Buzhong extract could alter the cellular membrane and/or generation of free radicals that have oxidant properties modifying the labeling of blood constituents with 99mTc.
Buzhong Yi Qi Wan (Buzhong) é uma fórmula utilizada na Medicina Tradicional Chinesa para tratamento de distúrbios nos sistemas digestório e circulatório. Constituintes sangüíneos marcados com tecnécio-99m (99mTc) são usados na medicina nuclear. O objetivo deste estudo foi investigar os efeitos do extrato de Buzhong na marcação de constituintes sangüíneos com 99mTc. Amostras de sangue de ratos Wistar foram incubadas com diferentes concentrações do extrato de Buzhong e a marcação de constituintes sangüíneos com 99mTc foi realizado. Plasma e células sangüíneas foram separados, frações solúveis e insolúveis do plasma e das células sangüíneas foram isoladas. A radioatividade nos constituintes sangüíneos foi contada e as porcentagens de radioatividade incorporada (%ATI), determinada. Extrato de Buzhong nas maiores concentrações utilizadas altera significativamente (p<0.05) a %ATI nos constituintes sangüíneos. Substâncias presentes no extrato de Buzhong poderiam alterar a membrana celular e/ou gerar radicais livres, que têm propriedades oxidantes, modificando a marcação dos constituintes sangüíneos com 99mTc.
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Authors ;Tania Santos Giani;Severo de Paoli;Giuseppe Antonio Presta;Adalgisa Ieda Maiworm;Sebastião David Santos-Filho;José Brandão-Neto;Aldo da Cunha Medeiros;Adenilson de Souza da Fonseca;Mario Bernardo-Filho
Journal current drug delivery
Year 2007
DOI
10.1590/S1516-89132007000600013
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000600013
Keywords
buzhong yi qi wanbiotechnology

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