Acetylsalicylic acid and morphology of red blood cells

This work evaluated the effect of in vitro and in vivo treatment with ASA on the morphology of the red blood cells. Blood samples or Wistar rats were treated with ASA for one hour. Blood samples or animals treated with saline were used as control group. Blood smears were prepared, fixed, stained and the qualitative and quantitative morphology of red blood cells were evaluated under optical microscopy. Data showed that the in vitro treatment for one hour with ASA at higher dose used significantly (p<0.05) modified the perimeter/area ratio of the red blood cells. No morphological alterations were obtained with the in vivo treatment. ASA use at highest doses could interfere on shape of red blood cells.

Este trabalho avaliou o efeito do tratamento in vitro e in vivo com AAS na morfologia dos eritrócitos. Amostras de sangue ou ratos Wistar foram tratadas com AAS por uma hora. Amostras sangüíneas ou animais tratados com salina foram utilizados como grupos controle. Distensões de sangue foram preparadas, fixadas, coradas e a análise morfológica qualitativa e quantitativa dos eritrócitos foi realizada em microscópio óptico. Os dados mostraram que o tratamento in vitro por uma hora com AAS na maior dose utilizada modificou significativamente (p<0.05) a relação perímetro/área dos eritrócitos. Não foram obtidas alterações morfológicas com o tratamento in vivo. O uso do AAS em doses altas poderia interferir na forma dos eritrócitos.

Assessment of effects of a Cordia salicifolia extract on the radiolabeling of blood constituents and on the morphology of red blood cells.

Effects of a Cordia salicifolia (porangaba) extract on the labeling of blood cells (BCs) with technetium-99m ((99m)Tc) and on the morphology of red BCs were evaluated. Labeling of cellular and molecular structures with (99m)Tc depends on a reducing agent. Some physical characteristics, as visible absorbance spectrum, electric conductivity, and refractive index of this porangaba extract, were also determined. Blood samples from Wistar rats were incubated with porangaba extract or with 0.9% NaCl (control). Labeling of blood constituents with (99m)Tc was performed. Plasma (P) and BCs, both soluble (SF-P and SF-BC) and insoluble (IF-P and IF-BC) fractions, were separated. The radioactivity in each fraction was counted, and the percentage of radioactivity incorporated (%ATI) was calculated. Blood smears were prepared, fixed, and stained, and the morphology of the red BCs was evaluated. Data showed an absorbance peak at 480 nm and electric conductibility and refractive index concentration-dependent. Porangaba extract decreased significantly (P < .05) the BC, IF-P, and IF-BC %ATI, and no modifications were verified on the shape of red BCs. Analysis of the results reveals that some physical parameters could be useful to aid in characterizing the extract studied. Moreover, it is possible that chemical compounds of this extract could have chelating/redox actions or be capable of binding to plasma and/or cellular proteins.

Effects of Cinnamomum zeylanicum treatment on radiolabeling of blood bonstituents and morphology of red blood cells in Wistar rats

The aim of this study was to evaluate the effect of in vivo treatment with an aqueous cinnamon extract on thelabeling of blood constituents with 99mTc and on the morphology of red blood cells from Wistar rats. Animals were treated with cinnamon extract at different doses and for different periods of time. As controls, animals treated with0.9% NaCl. Labeling of blood constituents with 99mTc was performed. Plasma, blood cells and insoluble fractions were isolated. Radioactivity in each fraction was counted and the percentage of radioactivity (%ATI) was calculated. Also, blood smears were prepared to morphological analysis of red blood cells from. Data showed that in vivo cinnamon extract did not significantly (p>0.05) modify the %ATI of blood constituents and morphology of red blood cells. The results suggest that in vivo aqueous cinnamon could not affect the membrane structures involved in transport of ions or the oxidation state of stannous and pertechnetate ions.

O objetivo deste estudo foi avaliar efeitos do tratamento in vivo com um extrato aquoso de canela na marcação de constituintes sangüíneos com 99mTc e na morfologia de hemácias de ratosWistar. Os animais foram tratados com diferentes doses ou por diferentes tempos com extrato de canela Como controles, animais tratados com NaCl 0,9%. A marcação de constituintes sangüíneos com 99mTc foi realizada, plasma, células sangüíneas e frações insolúveis foram isoladas. A radioatividade em cada fração foi contada e a porcentagem de radioatividade (%ATI) foi calculada. Distensões sangüíneas foram preparadas para análise morfológica dehemácias. Os dados mostraram que o tratamento in vivo com extrato de canela não modificaria significativamente (p>0,05) a %ATI nosconstituintes sangüíneos e a morfologia de hemácias. Os resultados sugerem que o extrato aquoso de canela não afetaria in vivo as estruturas da membrana envolvidas no transporte de íons ou o estado de oxidação dos íons estanoso e pertecnetato.