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1

Morphological and mineral characteristics of peripheral blood in female polar fox in relation to age

100%
Piotrowska A., Szymeczko R., Ozgo M., Boguslawska-Tryk M., Burlikowska K.
Folia Biologica
|
2008
|
vol. 56
|
issue 3-4
263-267
EN
The aim of the study was to determine the values of selected haematological and biochemical parameters in peripheral blood of female polar fox in relation to the age of the animals. The research involved 50 polar fox females three months after the lactation period (i.e. the non-mating period).Animalswere divided into 5 age groups (n=10), ranging from1 to 5 years of age. In blood samples the following parameters were determined: RBC, Ht, Hb, WBC, PLT, red blood cell parameters (MCV,MCH,MCHC) and the percentage of respective kinds of white blood cells in the total number of leukocytes. The content of Ca, Pi, Na, K, Cl, Mg, Fe, Cu and Zn as well as the ALP and ACP activity was determined in blood serum. In comparison with one year-old females, in peripheral blood of females fromthe remaining age groups an increase in RBC, Ht and Hb content was observed as well as a significant (P<0.05) decrease in WBC level together with a lower number of lymphocytes and an increase in the relative content of granulocytes and monocytes. No distinct relationship between the content of Ca, Na, Cl, Mg, Cu, Zn, the activity of ALP and ACP and the age of the animals was observed. The highest concentration of Pi and K was found in the blood serumof one year-old females. The content of Fe decreased
2

Effect of converting enzyme inhibitor on copper and iron concentrations of blood plasma in calves during the neonatal period

86%
Skrzypczak W., Dratwa-Chalupnik A., Ozgo M., Michalerk K., Lepczynski A., Hejza K., Siwa J.
Folia Biologica
|
2010
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vol. 58
|
issue 1-2
119-124
EN
The converting enzyme catalyzes the conversion of angiotensin I to angiotensin II. Ang II is the key component of the renin-angiotensin-aldosterone (RAA) system, regulating water-electrolyte balance in newborn calves. Captopril is an inhibitor of the angiotensin-converting enzyme. The aim of this study was to examine the effect of captopril-induced reduction of convertase activity on copper and iron concentrations of blood plasma in calves. The experiment was carried out on 10 Holstein-Friesian female calves, during the first week of life. Copper and iron concentrations in blood plasma were examined before and after captopril administration (0.5, 1, 2, 4, and 6 hours after giving the inhibitor) on subsequent days of the experimental period. The results demonstrated that the copper concentration of blood plasma increased with age. On the seventh day, the copper concentration stabilised at the level observed in adult cattle. Measured before captopril administration, the iron concentration in blood plasma changed: the highest iron concentration was observed on the first day of life, which was followed by a decrease on the third day, and thereafter an increase on the seventh day. These changes may significantly influence the neonatal adaptation of newborn calves, particularly hemopoiesis efficiency. Captopril did not cause statistically significant changes in plasma copper concentration in calves. However, the reduction of angiotensin convertase activity induced by captopril administration resulted in a drop of plasma iron concentration, observed already within 1-2 hours after administration of the inhibitor, and especially within two days post partum. The results indicate that an efficient mechanism maintaining a constant concentration of selected minerals may involve changes in the reabsorption of these minerals from the system fluids to tissues.
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