Análise dos valores hematológicos de camundongos com distúrbios hemostáticos ao longo do seu desenvolvimento

Abstract

The mouse was chosen as an animal model because of the possibility of being genetically manipulated, having lineages originated through induced or spontaneous mutations. The mutant pearl mice have reduced levels of adenine and serotonin nucleotides in the dense platelet granules and they are a model for Hermansky- Pudlak syndrome. The Vwf-/- mice were genetically modified to present mutations in the Vwf gene, to study von Willebrand disease. Other mice are genetically modified to have hemostatic changes, such as type A hemophilia (deficiency of coagulation factor VIII) and B (deficiency of coagulation factor IX). This work aimed to analyze the blood count of pearl mice, hemophiliac A and B and von Willebrand disease and test collection techniques. Twenty mice from each strain were used, ten males and ten females that were weighed weekly until the age of two months, after which they were weighed monthly. Three blood samples were collected from each animal in three different ways: caudal vein, saphenous vein and retro-orbital plexus. Regarding the growth curve, males are heavier than females, less HB males who are smaller than children up to the fifth week of age. And there was little difference in weight between the lines compared to the genetic background. The analyzed data of the hemograms were the white blood count (WBC), red blood cell count (RBC), hematocrit (HCT) and platelet count (PLT). It was concluded that the best collection method was the retro- orbital for all strains and the saphenous vein in the case of pearls, the least recommended method was the caudal vein. The weight curve is important to obtain a weight x age relationship over the physical development of the animals. It was noticed that hemophiliacs A really have high mortality, probably caused by internal bleeding. With hemogram data, there were also some differences between strains, such as the WBC of pearls and HA being higher than that of C57BL/6 and Vwf-/- and C57BL/6 also have a higher RBC value than the other strains and the HB, the lowest. The HCT had very similar values, varying between 41% and 51%. And PLT tend to have a higher value among males than females of all strains. It was possible to see some differences between lineages, gender and age, but more collections are still needed.