HAEMATOLOGICAL PARAMETERS OF STEERS AFTER VASECTOMY

2021 ◽  
Vol 1 (1) ◽  
pp. 79-83
Keyword(s):  
Alkaline Phosphatase ◽  
Blood Parameters ◽  
Lysozyme Activity ◽  
Phagocytic Index ◽  
Blood Samples ◽  
Lower Volga ◽  
Hereford Cattle ◽  
Serum Lysozyme ◽  
Calcium Phosphorus ◽  
Experimental Group

The Kazakh white-headed breed is a breed of beef cattle from Kazakhstan and Russia. The breed was developed between 1930 and 1950 on state farms in the Kazakh republic and the Lower Volga by crossing Hereford cattle with local Kazakh and Kalmyk stock. The breed resembles the Hereford in colour and conformation while incorporating the hardiness of the local breeds. The article shows the results of a study of blood parameters of Kazakh white-headed breed bulls after vasectomy. For this purpose two groups of 20 similar males of 12-14 months of age. The males of the experimental group underwent vasectomy in the farm «Aislu», by «torzing» the tail of the appendage. At 14-16 months of age blood samples were taken from both groups. Erythrocytes and haemoglobin, alkaline phosphatase, total protein, albumin, β and γ globulin were higher in vasectomized males. Data of leucocytes, calcium, phosphorus, reserve alkalinity, α- globulins were similar. Vasoectomy had little effect on serum lysozyme activity and on neutrophil phagocytic activity and phagocytic index. The bactericidal activity of serum of operated males was higher.

scholarly journals The cell protection of weated pigs for probiotics

2020 ◽  
pp. 111-119
Author(s):  
L. Bondarenko
Keyword(s):  
Immune System ◽  
Blood Serum ◽  
Phagocytic Activity ◽  
Lysozyme Activity ◽  
The State ◽  
Natural Resistance ◽  
Phagocytic Index ◽  
Control Group ◽  
Stressful Situation ◽  
Experimental Group

The immune system is central to ensuring the consistency of the body's homeostasis. The state of the body's natural resistance is determined by a set of non-specific protective mechanisms. Lymphocytes and phagocytes are actively involved in maintaining immunity. Lymphocytes recognize the antigens of pathogenic microorganisms, and phagocytes absorb and destroy the pathogens themselves. During the weaning of piglets from sows there is a decrease in the protective forces of their body. During this period, the natural resistance of the piglets is reduced due to the stressful situation caused by changing conditions of confinement, the transition to full feed and lack of sows. The immune system of weaning pigs is relatively weak, so when exposed to environmental and technological stressors, they become susceptible to various diseases. The use of probiotic drugs stimulates the activity of the immune system, prevents stress and immunodeficiency. One of these probiotics is the probiotic of domestic production Protecto-active. It w observed the the influence of the probiotic Protecto-active on the indices of nonspecific resistance of the young pigs organism to the growth. An increase in bactericidal activity of blood serum by 12.10% (P <0.05) and lysozyme activity of blood in the piglets of the experimental group was increased by 3.71% compared to control, which indicates the activation of the body's defenses and the increase in adaptive capacity. An important step in the study of the influence of the probiotic Protekto-active on the state of the immune system is to determine the phagocytic activity of neutrophils, phagocytic index and phagocytic number. In the experimental group of piglets that were fed the probiotic Protecto-active, we found an increase in leukocyte phagocytic activity by 9.0% (P <0.001), a phagocytic index by 51.7% (P<0.001) and a phagocytic number by 24.8% ( P <0.01) compared with the control group. Thus, using a probiotic Protecto-active, all indicators of phagocytosis increase: the number of phagocytes increases, their ability to capture microorganisms and increases their digestive capacity, it increases the bacterial and lysozyme activity of blood serum, which is positively reflected in the immunobiosity. Key words: probiotic, phagocytosis, phagocytic index, phagocytic number, phagocytic activity of leukocytes, cellular immunity, piglets

scholarly journals The effects of different anticoagulants on biochemical parameters in blood of dairy cows

2015 ◽  
Vol 69 (1-2) ◽  
pp. 13-20
Author(s):  
Branislava Belic ◽  
Marko Cincovic ◽  
Maja Dosenovic ◽  
Dragica Stojanovic ◽  
Zorana Kovacevic
Keyword(s):  
Alkaline Phosphatase ◽  
Dairy Cows ◽  
Alkaline Phosphatase Activity ◽  
Total Protein ◽  
Biochemical Parameters ◽  
Biochemical Analysis ◽  
Blood Parameters ◽  
Albumin Level ◽  
Blood Samples ◽  
Holstein Friesian

Routine analysis of blood parameters requires high precision. Therefore a significant number of methods and recommendations has been developed to ensure the obtaining of precise results. The aim of this study was to investigate whether the type of anticoagulant affects the values of biochemical parameters in the blood of dairy cows in relation to the values obtained from the serum. The study was carried out on 20 healthy cows of Holstein- Friesian breed in the second month of lactation. The blood was taken by venipuncture from v.coccigea. There were used five types of vacutainers as follows: for the serum separation, with heparin, EDTA, citrate, and fluoride. Samples from each cow were taken in all five types of vacutainers respectively. There was determined the concentration of: albumin, total protein, glucose, Ca, P, BHB, NEFA, urea, cholesterol, triglycerides, ALT, AST, AP, GGT and bilirubin. The results of the analysis of samples that contained anticoagulants were compared statistically with analysis in serum that was considered to be the control one. It was also calculated the percentage of deviation in average values of concentration of metabolites obtained from samples with different anticoagulants in regard to the serum value. The results of the investigation show that anticoagulants influence the values of biochemical parameters in the blood of cows. In the samples where heparin was used as anticoagulant there was found higher albumin level (deviation 4.1%) as well as total protein (1.4%), but lower value of alkaline phosphatase activity relative to the serum (-33%). In the samples in which EDTA was used there were significantly lower levels of total protein (-5.8%), Ca (-49.6%), P (-17.7%), AP (-32%) and higher value AST (10.6%) compared to serum. In the samples where citrate or fluoride were used as anticoagulants there were found lower values of total protein, albumin, glucose (only citrate), Ca, P, BHB, NEFA, urea (only citrate), cholesterol, AP and GGT (only fluoride) and lower bilirubin when using citrate or higher when using fluoride, in comparison to the serum. Deviations of biochemical parameters measured from blood samples that were in citrate or fluoride were as follows: total protein (-5.3%, -5.2%), albumin (-7%, -5.7%), glucose (only citrate -6.2%), Ca (-55%, -82%), P (-29%, -24%), BHB (-53%, -80%), NEFA (-62.1%, -79 , 4%), urea (only citrate, -25.5%), cholesterol (-28.6%, -28.4%), AP (-38%, -32%), and GGT (only -17 fluoride, 8%) and higher bilirubin (-22.8%, 64.4%). For routine clinical biochemical analysis of blood of cows it is the most reliable to use the samples with heparin as an anticoagulant, because the use of other anticoagulants gives large variations in the values of biochemical parameters in relation to serum.

scholarly journals THE EFFECT OF «ARCUSIT» ON BIOCHEMICAL AND IMMUNOLOGICAL PARAMETERS BLOOD SERA IN SILVER-BLACK FOX (SILVER-BLACK FOX)

2021 ◽  
Vol 247 (3) ◽  
pp. 192-197
Author(s):  
I.I. Okulova ◽  
◽  
I.A. Domsky ◽  
Yu.A. Berezina ◽  
Z.N. Beltyukova ◽  
...  
Keyword(s):  
Experimental Data ◽  
Blood Serum ◽  
Bactericidal Activity ◽  
Lysozyme Activity ◽  
The Body ◽  
Phagocytic Index ◽  
Control Group ◽  
Immunological Parameters ◽  
Nonspecific Resistance ◽  
Experimental Group

The use of «Arkusit» at a dose of 20 μg / kg of body weight indicates a beneficial effect on the factors of nonspecific resistance of the silver-black fox. The concentration of alkaline phosphatase in the blood serum in the experimental group decreased by 1.8 times (P <0.001), the ALT index - by 1.2 (P <0.05). The concentration of glucose in the experimental group increased 2 times (P <0.05) compared with the control group. In animals of the experimental group, the lysozyme activity of blood serum increased 1.3 times (P <0.05), the OPR reaction and the phagocytic index - 1.4 times (P <0.05), the bactericidal activity of blood serum - 1.8 times (P <0.05). «Arcusit» stimulates the synthesis of gamma globulins, increases the opsonophagocytic, bactericidal activity of blood serum. Thus, the analysis of experimental data indicates that the drug «Arcusit» has a pronounced immunostimulating effect, providing the activation of factors of nonspecific resistance of the body of the silver-black fox.

scholarly journals Effort of Varying Intensity as a Factor Influencing the Variability of Selected Biochemical Blood Parameters of Jumping Horses

2012 ◽  
Vol 56 (2) ◽  
pp. 225-229 ◽  
Author(s):  
Hanna Bis-Wencel ◽  
Krzysztof Lutnicki ◽  
Agnieszka Zofia Rowicka ◽  
Bożena Nowakowicz-Dębek ◽  
Monika Bryl
Keyword(s):  
Alkaline Phosphatase ◽  
Creatine Kinase ◽  
Muscle Damage ◽  
Muscle Tissue ◽  
Blood Parameters ◽  
Biochemical Properties ◽  
Blood Samples ◽  
Time Points ◽  
The Difference ◽  
Intensity Characteristic

Abstract Blood samples were collected from horses in four time points of the spring-winter training season, according to the difference in effort intensity characteristic for each period. Serum contents of glucose, cholesterol, and creatinine, as well as activity of creatine kinase, aspartate and alanine aminotransferases, and alkaline phosphatase were determined. Training did not cause muscle damage, and as a result of training, changes in the characteristics of both, contraction and biochemical properties of muscle tissue took place, which was confirmed by the conducted tests.

scholarly journals THE STUDY OF BIOCHEMICAL INDIXES OF ORAL FLUID IN ORTHODONTIC TREATMENT

2018 ◽  
pp. 21-26
Author(s):  
Yu.V. Filimonov ◽  
V.M. Istoshyn ◽  
A.V. Pachevska ◽  
N.V. Drachuk ◽  
O.P. Dudik ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Calcium Level ◽  
Orthodontic Treatment ◽  
Inflammatory Cytokine ◽  
Oral Fluid ◽  
Lysozyme Activity ◽  
Dental Anomalies ◽  
Anti Inflammatory ◽  
Experimental Group ◽  
Anti Inflammatory Cytokine

The work is devoted to the study of the reactivity of the biochemical composition of saliva in children with SCI, which was used for the treatment of non-removable and removable OA. There was a decrease in the activity of the α-amylase enzyme during orthodontic treatment in both experimental groups: in patients in the experimental group, which used non-removable equipment 3 months after starting treatment at 16.5% and 6 months after starting treatment it was 16%. There was a decrease in the activity of saliva α-amylase after 3 months at 11% and in samples of saliva taken after 6 months at 10% during treatment of patients of the experimental group with removable orthodontic equipment. The total calcium level after 3 months of observation was 15% lower compared to the start of treatment. The phosphorus level was 9% lower at this moment of observation. After 6 months of observation, the trace elements were different from the original ones: calcium was 27% lower, and the level of phosphorus was lower comparing to the baseline by 15%. Treatment of SCI with removable orthodontic equipment impaired the mineral balance: the calcium level after 3 months of observation was lower by 12%, and the level of phosphorus was lower by 6% compared to the beginning of the study. After 6 months of observation, the traced elements differed from the original ones: the level of calcium was 21% lower than the previous values, and the level of phosphorus was lower by 13% compared to the start of treatment. The evaluation of alkaline phosphatase activity in mixed unstimulated saliva using non-removable orthodontic equipment showed that the level of alkaline phosphatase after 3 months of treatment was 3% lower compared to the beginning of treatment, and after 6 months of observation activity of the investigated enzyme was less than the initial by 10%. Treatment of dental anomalies with removable equipment inhibited the enzyme activity: after 3 months of treatment, the activity of alkaline phosphatase was less than 7% compared to the beginning of the study, and after 6 months of observation activity of the investigated enzyme differed from the initial by 20%. The use of non-removable orthodontic equipment led to a significant increase in the activity of IL-1β. Three months after starting the study, IL-1β was 4-fold higher compared to the start of treatment, and after 6 months of treatment, it became 9-fold higher. Treatment of dental abnormalities with removable equipment showed that the activity of IL-1β after 3 months of treatment increased 4-fold, and after 6 months of observation the researched index was different from the initial 9-fold. At the 3rd month of observation in children using non-removable OA, the activity of lysozyme decreased by 21%; reduction of lysozyme activity during the 6th month of treatment constituted 23%. Patients in the experimental group treated with detachable OA observed an increase in lysozyme activity at the 3rd month of observation by 27%, and 6 months after the start of treatment, the activity of lysozyme was less than 29% compared to the data of the 3rd month of the use of non-removable orthodontic equipment it led to a significant increase in the level of anti-inflammatory cytokine: after 3 months of observation was 2.5 times more than at the beginning of treatment, and after 6 months of observation, they differed from the initial in 4 times. Treatment of dental anomalies with removable orthodontic equipment also contributed to an increase in anti-inflammatory cytokine: IL-4 levels were higher after 3 months of treatment compared to baseline data by 1,8, and after 6 months of follow-up, the study figure was in 4 times higher than the previous values. The obtained results of the study of the reactivity of biochemical changes in oral fluid using removable and non-removable OA in children can be used in planning of orthodontic treatment as diagnostic markers for the further selection of tactics and assessment of the oral cavity in children on the background of treatment of JFA by removable and non-removable OA.

scholarly journals EFFECT OF STAPHYLOCOCCUS AUREUS INFECTION ON THE ACTIVITIES OF THE ALKALINE PHOSPHATASE, ASPARTATE AND ALANINE TRANSFERASES IN THE BLOOD PLASMA OF RABBITS

2019 ◽  
Vol 17 (4) ◽  
pp. 334-339
Author(s):  
T. Mircheva Georgieva ◽  
Iv. Penchev Georgiev ◽  
N. Markov ◽  
I. Markov ◽  
N. Bozakova ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Alkaline Phosphatase ◽  
Veterinary Medicine ◽  
Initial Level ◽  
Control Group ◽  
Blood Samples ◽  
Aureus Infection ◽  
Biochemical Analyzer ◽  
And Control ◽  
Experimental Group

The aim of this paper is to investigate the dynamics of the activities of alkaline phosphatase (AP), aspartate (ASAT) and alanine (ALAT) transferases in plasma of rabbits that are infected with Staphylococcus aureus (S. aureus). METHODS: The experiment was carried out with 12 male rabbits (White New Zealand), divided into two groups: experimental and control. Blood samples from each rabbit were taken before the euthanasia of v. auricularis externa as follows: at 3 months of age, coinciding with 0 hours before infection, and at 6, 24, 48, 72 hours and on days 7, 14 and 21 after S. aureus infection in sterile heparinized tubes. The AP, ASAT and ALAT were performed on a semi-automated biochemical analyzer, Section in Biochemistry, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria. RESULTS: The results showed significant decreasing (P <0.05) of AP 48h after infection and on day 14 comparing to the control group(P<0,01), significant increasing of ALAT (P<0,01) comparingto the control group and pre-initial level and significant increasing of ASAT on day 14 and day 21 in the experimental group comparing initial level.

scholarly journals Effect of Eight Weeks of Aerobic Interval Training on the Serum Concentrations of Alkaline Phosphatase, Osteocalcin and Parathyroid Hormone in Middle-aged Men

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Mohsen Bakhtiyari ◽  
Mehrdad Fathei ◽  
Keyvan Hejazi
Keyword(s):  
Alkaline Phosphatase ◽  
Parathyroid Hormone ◽  
Training Program ◽  
Interval Training ◽  
Analysis Of Covariance ◽  
Serum Concentrations ◽  
Middle Aged ◽  
Aerobic Interval Training ◽  
Calcium Phosphorus ◽  
Experimental Group

Background: Osteoporosis is the most common disorder of bone and mineral metabolism. This disease is associated with decreased bone density and loss of bone microstructure, leading to increased fragility and risk of bone fractures. Objectives: The aim of this study was to evaluate the effect of eight weeks of aerobic interval training on the serum concentrations of alkaline phosphatase, osteocalcin, and parathyroid hormone in middle-aged men. Methods: This was a quasi-experimental study of 24 men, who were divided into two groups of control (n = 12) and aerobic interval training (n = 12). Training performed during eight weeks, three times a week, each session for 45 to 60 minutes. Blood samples were analyzed for the concentrations of calcium, phosphorus, alkaline phosphatase, osteocalcin, and parathyroid hormone before and after completion of the training program. Paired samples t-test and analysis of covariance (ANCOVA) were run to analyze the data (P ≤ 0.05). Results: Weight and body mass index decreased significantly, and the maximum oxygen consumption at the end of the training program increased significantly in the experimental group. Eight weeks of aerobic exercise led to a significant increase in the amounts of calcium (P = 0.001), phosphorus (P = 0.001), alkaline phosphatase (P = 0.001), osteocalcin (P = 0.001), and parathyroid hormone (P = 0.001) in the experimental group. Conclusions: It can be stated that eight weeks of aerobic interval training may be effective in preventing osteoporosis by reducing body composition indices and increasing calcium, phosphorus, alkaline phosphatase, osteocalcin, and serum parathyroid hormone in inactive men.

Vitamin D Provision in High-Yield Dairy Cows During the Winter Housing Period

2014 ◽  
Vol 1 (1) ◽  
pp. 42-46
Author(s):  
L. Yuskiv ◽  
V. Vlizlo
Keyword(s):  
Vitamin D ◽  
Alkaline Phosphatase Level ◽  
Mineral Metabolism ◽  
Physiological State ◽  
Blood Parameters ◽  
Postnatal Period ◽  
High Yield ◽  
Oral Supplementation ◽  
Calcium Phosphorus ◽  
Vitamin D 3

Aim. To investigate the vitamin D status in highly productive cows during winter housing period and effect of cholecalciferol by various ways of vitamin D 3 injection to cows in last days of gestation and after calving. Methods. Enzyme-linked immunoassay, spectrophotometry. Results. It has been stated that intramuscular injection of cholecalciferol into cows caused increase of the vitamin D 3 active metabolite – 25-OHD 3 , calcium, phosphorus and magnesium levels together with decrease of alkaline phosphatase level in pre- and post-natal periods. Oral supplementation makes little infl uence on the studied blood parameters of cows. Conclusions. Extrabuccal administration and oral supplementation of cholecalciferol in winter housing period to high-yield cows in the last days of gestation and after calving is accompanied by increased levels of its metabolites and their effect on mineral metabolism in the postnatal period. The nature of these changes depends on the mode of vitamin D administration and the physiological state of the cows.

Safety of Antitheilerial Drug Buparvaquone in Rams

2018 ◽  
Vol 46 (1) ◽  
Author(s):  
Nermin Isik ◽  
Ozlem Derinbay Ekici ◽  
Ceylan Ilhan ◽  
Devran Coskun
Keyword(s):  
Oxidative Stress ◽  
Hydrogen Peroxide ◽  
Lipid Peroxidation ◽  
Alkaline Phosphatase ◽  
Blood Cell ◽  
Blood Urea Nitrogen ◽  
Troponin I ◽  
Oxidative Status ◽  
Blood Samples ◽  
Heart Damage

 Background: Theileriosis is a tick-borne disease caused by Theileria strains of the protozoan species. Buparvaquone is the mostly preferred drug in the treatment theileriosis, while it is safety in sheep, has not been detailed investigated. It has been hypothesized that buparvaquone may show side effects and these effects may be defined some parameters measured from blood in sheep when it is used at the recommended dose and duration. The aim of this research was to determine the effect of buparvaquone on the blood oxidative status, cardiac, hepatic and renal damage and bone marrow function markers.Materials, Methods & Results: In this study, ten adult (> 2 years) Akkaraman rams were used. Healthy rams were placed in paddocks, provided water ad libitum, and fed with appropriate rations during the experiment. Buparvaquone was ad­ministered at the dose of 2.5 mg/kg (IM) intramuscularly twice at 3-day intervals. Blood samples were obtained before (0. h, Control) and after drug administration at 0.25, 0.5, 1, 2, 3, 4 and 5 days. The blood samples were transferred to gel tubes, and the sera were removed (2000 g, 15 min). During the study, the heart rate, respiratory rate, and body temperature were measured at each sampling time. In addition, the animals were clinically observed. Plasma oxidative status mark­ers (Malondialdehyde, total antioxidant status, catalase, glutathione peroxidase, superoxide dismutase), serum cardiac (Troponin I, creatine kinase-MBmass, lactate dehydrogenase), hepatic (Alkaline phosphatase, alanine aminotransferase, aspartate aminotransferase, gamma glutamyltransferase, total protein, albumin, globulin) and renal (Creatinine, blood urea nitrogen) damage markers and hemogram values (white blood cell, red blood cell, platelet, hemogram, hematocrit) were measured. Buparvaquone caused statistically significantly (P < 0.05) increases in the troponin I and blood urea nitrogen levels and fluctuations in alkaline phosphatase activity, but there was no any statistically significance difference determined in the other parameters.Discussion: In this study, buparvaquone was administered two times at a dose of 2.5 mg/kg (IM) at 3-day intervals. Al­though the result was not statistically significant (P > 0.05), it was determined that buparvaquone gradually increased the levels of the main oxidative stress marker, MDA, by approximately 2.8 fold. CAT and GPX levels were also found to have decreased by 2.2 fold. Buparvaquone may cause lipid peroxidation by producing free radicals. Some other antiprotozoal drugs may affect the oxidative status and may increase MDA level and decrease SOD level. In this study, MDA, which is an indicator of lipid peroxidation in vivo, was used to partially detect developing lipid peroxidation. Changes in the levels of reduced GPX and CAT enzymes could be attributed to their use in mediating the hydrogen peroxide detoxification mechanisms. The absence of significant changes in the TAS levels in this study suggests that buparvaquone may partially induce oxidative stress by producing hydrogen peroxide, but no significant changes occurred in the oxidative stress level because of the high antioxidant capacity of sheep. In this study, buparvaquone caused a statistically significant increase (P < 0.05) in the level of Tn-I, which is a marker of specific cardiac damage (P < 0.05), whereas there was no statistically (P > 0.05) significant increase in CK-MBmass. Tn-I and CK-MB levels, which are used to define heart damage in humans, have been successfully used to determine heart damage in sheep. In this research study, the statistically significant increases in Tn-I but not CK-MBmass levels could be considered indicative of mild cardiac damage.Keywords: ram, buparvaquone, safety.

P1237TISSUE-NONSPECIFIC ALKALINE PHOSPHATASE, A CULPRIT DURING ARTERIAL MEDIA CALCIFICATION BUT INDISPENSABLE DURING PHYSIOLOGICAL BONE FORMATION/-MINERALIZATION IN RATS

2020 ◽  
Vol 35 (Supplement_3) ◽  
Author(s):  
Britt Opdebeeck ◽  
José Millan Luis ◽  
Anthony Pinkerton ◽  
Anja Verhulst ◽  
Patrick D'Haese ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Bone Formation ◽  
Vascular Calcification ◽  
Rat Model ◽  
Bone Mineralization ◽  
Calcium Content ◽  
Marker Genes ◽  
Peripheral Arteries ◽  
Calcium Phosphorus ◽  
Chondrogenic Marker

Abstract Background and Aims Vascular media calcification is frequently seen in elderly and patients with chronic kidney disease (CKD), diabetes and osteoporosis. Pyrophosphate is a well-known calcification inhibitor that binds to nascent hydroxyapatite crystals and prevents further incorporation of inorganic phosphate into these crystals. However, the enzyme tissue-nonspecific alkaline phosphatase (TNAP), which is highly expressed in calcified arteries, degrades extracellular pyrophosphate into phosphate ions, by which pyrophosphate loses its ability to block vascular calcification. Here, we aimed to evaluate whether a TNAP inhibitor is able to prevent the development of arterial calcification in a rat model of warfarin-induced vascular calcification. Method To induce vascular calcification, rats received a diet containing 0.30% warfarin and 0.15% vitamin K1 throughout the entire study and were subjected to the following daily treatments: (i) vehicle (n=10) or (ii) 10 mg/kg/day TNAP-inhibitor (n=10) administered via an intraperitoneal catheter from start of the study until sacrifice at week 7. Calcium, phosphorus and parathyroid hormone (PTH) levels were determined in serum samples as these are important determinants of vascular calcification. As TNAP is also expressed in the liver, serum alanine aminotransferase (ALT) and aspartate (AST) levels were analyzed. At sacrifice, vascular calcification was evaluated by measurement of the total calcium content in the arteries and quantification of the area % calcification on Von Kossa stained sections of the aorta. The mRNA expression of osteo/chondrogenic marker genes (runx2, TNAP, SOX9, collagen 1 and collagen 2) was analyzed in the aorta by qPCR to verify whether vascular smooth muscle cells underwent reprogramming towards bone-like cells. Bone histomorphometry was performed on the left tibia to measure static and dynamic bone parameters as TNAP also regulates physiological bone mineralization. Results No differences in serum calcium, phosphorus and PTH levels was observed between both study groups. Warfarin exposure resulted in distinct calcification in the aorta and peripheral arteries. Daily dosing with the TNAP inhibitor (10 mg/kg/day) for 7 weeks significantly reduced vascular calcification as indicated by a significant decrease in calcium content in the aorta (vehicle 3.84±0.64 mg calcium/g wet tissue vs TNAP inhibitor 0.70±0.23 mg calcium/g wet tissue) and peripheral arteries and a distinct reduction in area % calcification on Von Kossa stained aortic sections as compared to vehicle condition. The inhibitory effects of SBI-425 on vascular calcification were without altering serum liver markers ALT and AST levels. Furthermore, TNAP-inhibitor SBI-425 did not modulate the mRNA expression of osteo/chondrogenic marker genes runx2, TNAP, SOX9, collagen 1 and 2. Dosing with SBI-425 resulted in decreased bone formation rate and mineral apposition rate, and increased osteoid maturation time and this without significant changes in osteoclast- and eroded perimeter. Conclusion Dosing with TNAP inhibitor SBI-425 significantly reduced the calcification in the aorta and peripheral arteries of a rat model of warfarin-induced vascular calcification and this without affecting liver function. However, suppression of TNAP activity should be limited in order to maintain adequate physiological bone mineralization.

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