• Publikační typ
• abstrakt z konference MeSH

The aim of the study was to compare the effects of three natural bioactive compounds (and their combinations) on normal vs. tumour-transformed mouse cells. The cytotoxic effect of Aeruginosin-865 (Aer), capsaicin (Cap), resveratrol (Res) and their combinations was evaluated on normal hepatocytes (AML) and tumour cells derived from livers (Hepa) and kidneys (Renca). Various concentrations from 25 to 200 μM of tested substances were used. Only the Aer + Res combination and a low concentration of Res had a significant cytotoxic effect on Hepa and Renca and no significant cytotoxic effect on AML. Cap had a significant cytotoxic effect on all tested cell lines, but tumour-derived cells showed higher resistance than AML. A significantly increased cytotoxicity was found in the combination of Cap + Res compared to each substance alone. All types of cells showed similar sensitivity to the cytotoxic effect of Cap + Res. Because of a possible hepatotoxic effect, we recommend further investigations into side-effects of Cap + Res. No cytotoxic effect was described in Cap + Aer or in Aer alone. Only substances with a significant cytotoxic effect on tumour cells and no cytotoxic effect on normal cells can be potentially used in anticancer treatment. According to the results, only Res or the combination of Aer + Res can be recommended for further evaluation in the process of new anticancer drug development. The potential hepatotoxic effect of Cap + Res can significantly limit the utilisation of these substances in anticancer treatment.

Diethylnitrosamine is well known for its toxic and carcinogenic properties affecting mainly liver and kidneys. Capsaicin has been proven in previous years as a promising protective agent against many health problems affecting modern people. In this study we used diethylnitrosamine induced mouse experimental model of liver and kidney damage to assess the potential chemopreventive effect of capsaicin in vivo. Fifty female ICR mice were randomly divided into five groups intraperitoneally administered 1% ethanol solution in controls, capsaicin to assess its toxicity, diethylnitrosamine alone, and diethylnitrosamine and capsaicin in combination in different manners in two groups. After 14 weeks all mice were sacrificed, complete necropsy was performed and liver and kidneys were used for further examination. Slides of both organs stained with haematoxylin and eosin were histologically evaluated and immunohistochemical detection of proliferating cell nuclear antigen and glutamine synthetase in the liver tissue was performed. Histological evaluation of the liver and kidneys revealed toxic damage of diethylnitrosamine treated animals, whereas mice that received the combination of the substances showed milder lesions. Proliferating cell nuclear antigen expression was lower in diethylnitrosamine treated animals compared to the control and capsaicin groups, pointing to a disruption of the proliferative activity of hepatocytes in the juvenile liver. Glutamine synthetase expression did not differ between the groups, indicating that no tumours were induced by any of the substances used in our study. In conclusion, our experiment demonstrated the toxic properties of diethylnitrosamine in mice liver and kidneys, with the promising beneficial effect of capsaicin.

Gastric dilation-volvulus (GDV) syndrome in dogs is associated with complex metabolic, acid-base, and electrolyte abnormalities. The aim of this study was to evaluate previously analyzed factors (lactate and BE) in combination with other acid-base parameters (pH, pCO2, bicarbonate, base excess [BE], anion gap [AG], and strong ion difference) and electrolyte concentrations and to evaluate their association with the incidence of gastric necrosis and outcome in dogs with GDV. A retrospective study in 75 dogs with gastric dilation-volvulus syndrome, University veterinary teaching hospital. Medical records were reviewed including signalment, history, initial plasma lactate, acid-base parameters, and electrolyte concentrations, surgical findings and outcome. The overall mortality was 18.7%. In dogs with gastric necrosis, higher initial plasma lactate (median 5.84 vs. 3.36 mmol/L) and AG (20.7 vs. 16.55 mmol/L) and lower pH (7.29 vs. 7.36), bicarbonate (18.7 vs. 22.9 mmol/L), and BE concentration (-8.1 vs. -1.85 mmol/L) were found compared to dogs without gastric necrosis. Anorganic phosphorus was the only electrolyte investigated for which a significant difference was noted between dogs with and without gastric necrosis (1.93 vs. 1.39 mmol/L). The initial plasma lactate concentration (3.36 mmol/L vs. 9.68 mmol/L) and AG (16.8 vs. 20.95 mmol/L) were lower in survivors than nonsurvivors. Survivors had higher pH (7.35 vs. 7.27), bicarbonate concentrations (22.9 vs. 17.35 mmol/L), and BE (-1.9 vs. -9.55 mmol/L) compared to nonsurvivors. Anorganic phosphorus was ultimately the only electrolyte with a significant difference between survivors and nonsurvivors (1.4 vs. 1.84 mmol/L). A multivariate logistic regression model of combination lactate, pH, bicarbonate, BE, AG, and anorganic phosphorus identified pH ≤7.331 and bicarbonate as factors independently associated with gastric necrosis. Similarly, pH ˃7.331, bicarbonate and anorganic phosphorus were independently associated with outcome. Higher initial plasma lactate, AG and anorganic phosphorus levels, and lower pH, BE and bicarbonate concentrations were found in GDV dogs with gastric necrosis. Similarly, initially higher plasma lactate, AG and anorganic phosphorus concentrations, and lower pH, BE and bicarbonate were found in GDV dogs who required euthanasia or who died after surgery. Of these parameters, pH and bicarbonate were strongly and independently associated with gastric necrosis, and pH, bicarbonate and phosphorus were independently associated with outcome.

• MeSH
• analýza přežití MeSH
• dilatace žaludku mortalita   veterinární   MeSH
• elektrolyty krev   MeSH
• koncentrace vodíkových iontů MeSH
• kyselina mléčná krev   MeSH
• nekróza MeSH
• nemoci psů krev   mortalita   patologie   MeSH
• psi MeSH
• retrospektivní studie MeSH
• syndrom MeSH
• volvulus žaludku mortalita   veterinární   MeSH
• žaludek patologie   MeSH
• záznamy jako téma veterinární   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• psi MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Česká republika MeSH

The aim of the study was to assess serum hyaluronic acid (HA) and transforming growth factor beta 1 (TGF-β1) concentrations: 1) to differentiate hepatic fibrosis from other forms of liver disease, and 2) for the non-invasive staging of canine liver fibrosis. We also evaluated the association between serum HA concentration and the size of the shunt vessel as an indirect marker of decreased liver clearance in patients with single congenital vascular anomaly. Forty-one healthy client-owned dogs and forty dogs diagnosed with hepatobiliary disease were enrolled in the prospective study. Patients were divided into 4 subgroups: 1) congenital portosystemic shunts (CPSS); 2) parenchymal diseases (a. mild and moderate fibrosis, b. advanced fibrosis and cirrhosis); 3) hepatic neoplasia; 4) biliary tract disorders based on thorough clinical, ultrasound and histopathological examination. Serum HA and TGF-β1 concentrations were measured using ELISA. The HA concentration was significantly increased in patients with advanced liver fibrosis/cirrhosis (P < 0.001) and CPSS (P < 0.001) compared to healthy dogs. Using a cut-off HA concentration of 135.94 ng/ml, the sensitivity and specificity for diagnosis for advanced liver fibrosis/cirrhosis was 100% (95% CI, 50.6–100) and 90.8% (95% CI, 81.6–95.7), respectively. The TGF-β1 levels did not significantly differ among groups (P = 0.180). Negligible correlation was found between serum HA concentration and the size of portosystemic shunt vessel (rs = 0.07; P = 0.831). These findings suggest that serum HA concentration is a potential non-invasive biomarker for advanced liver fibrosis and/or cirrhosis in dogs. The utility of measuring serum concentration of TGF-β1 for diagnosing canine liver fibrosis was not supported.

• MeSH
• biologické markery krev   MeSH
• biopsie metody   MeSH
• chronická hepatitida krev   veterinární   MeSH
• diferenciální diagnóza MeSH
• ELISA MeSH
• jaterní cirhóza diagnóza   krev   veterinární   MeSH
• kyselina hyaluronová * krev   MeSH
• laparoskopie metody   MeSH
• nemoci jater diagnóza   klasifikace   krev   veterinární   MeSH
• nemoci trávicího systému diagnóza   klasifikace   krev   veterinární   MeSH
• prospektivní studie MeSH
• psi MeSH
• ROC křivka MeSH
• senzitivita a specificita MeSH
• statistika jako téma MeSH
• transformující růstový faktor beta1 * krev   MeSH
• Check Tag
• psi MeSH
• Publikační typ
• práce podpořená grantem MeSH

OBJECTIVE: To establish reference intervals for traditionally- and Stewart's approach-determined acid-base parameters in a population of clinically healthy dogs. DESIGN: Prospective study (June 2011-September 2012). SETTING: Veterinary teaching hospital. ANIMALS: Two hundred twenty-four client-owned, clinically healthy dogs. INTERVENTIONS: Blood was collected from the jugular vein and the dorsal pedal artery. MEASUREMENTS AND MAIN RESULTS: In the whole blood samples, pH, PCO2 , and PO2 were measured and HCO3(-) , standard and total bicarbonate, base excess, oxygen content, and alveolar-arterial oxygen differences were calculated. Plasma sodium, potassium, chloride, calcium, albumin, and lactate concentrations were measured and the following parameters were calculated separately for venous and arterial samples: anion gap, anion gap corrected for albumin and phosphate, sodium chloride difference and ratio, chloride gap, strong ion difference, strong ion gap, and unmeasured anions. CONCLUSION: Reference intervals for traditionally- and Stewart's approach-determined acid-base parameters were established for venous and arterial blood in dogs.

• MeSH
• acidobazická rovnováha * MeSH
• analýza krevních plynů veterinární   MeSH
• chloridy krev   MeSH
• draslík krev   MeSH
• hydrogenuhličitany krev   MeSH
• kyselina mléčná krev   MeSH
• prospektivní studie MeSH
• psi krev   MeSH
• referenční hodnoty MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• psi krev   MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH

OBJECTIVE: To (1) measure C-reactive protein (CRP) and high mobility group box 1 (HMGB1) and (2) evaluate their prognostic value and relationship to severity of systemic inflammatory response syndrome, routine hematological and acid-base parameters in dogs with gastric dilatation volvulus (GDV). DESIGN: Prospective observational study from September 2010 to June 2012. SETTING: Veterinary teaching hospital. ANIMALS: Forty-one client-owned dogs with GDV. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Blood was collected before surgery (baseline), postsurgery, 6-10 hours postsurgery, and 18-22 hours postsurgery. CRP and HMGB1 were measured in all samples, and routine hematological, biochemical, and acid-base analyses were performed. Only baseline and postsurgery samples were used from nonsurvivors (n = 10). CRP increased significantly from postsurgery sampling to 18-22 hours postsurgery, while HMGB1 did not change over time. There was a significant difference in HMGB1 between survivors and nonsurvivors over time. Both proteins correlated with systemic inflammatory response syndrome severity, total leukocyte, segmented neutrophils, and band counts. HMGB1 correlated also with acid-base parameters (pH, bicarbonate, base excess). CONCLUSION: HMGB1 and CRP behaved differently in regards to their kinetic patterns, with HMGB1 appearing to better reflect the severity of tissue injury in dogs with GDV than CRP.

• MeSH
• biologické markery krev   MeSH
• C-reaktivní protein metabolismus   MeSH
• dilatace žaludku chirurgie   veterinární   MeSH
• náhlé příhody veterinární   MeSH
• nemoci psů krev   diagnóza   MeSH
• prediktivní hodnota testů MeSH
• prognóza MeSH
• prospektivní studie MeSH
• protein HMGB1 krev   MeSH
• psi MeSH
• syndrom systémové zánětlivé reakce krev   diagnóza   veterinární   MeSH
• volvulus žaludku chirurgie   veterinární   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• psi MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH
• práce podpořená grantem MeSH

• MeSH
• financování organizované MeSH
• Publikační typ
• abstrakty MeSH

• Publikační typ
• abstrakty MeSH

Cell therapy of myocardial infarction (MI) is under clinical investigation, yet little is known about its underlying mechanism of function. Our aims were to induce a sub-lethal myocardial infarction in a rabbit, to evaluate the abilities of labeled bone marrow mononuclear cells to migrate from the vessel bed into extracellular space of the myocardium, and to evaluate the short-term distribution of cells in the damaged left ventricle. Sub-lethal myocardial infarction was induced in rabbits by ligation of the left coronary vessel branch (in vivo). The Langendorff heart perfusion model (ex vivo) was used in the next phase. The hearts subjected to MI induction were divided into 3 groups (P1-P3), and hearts without MI formed a control group (C). Nanoparticles-labeled bone marrow mononuclear cells were injected into coronary arteries via the aorta. Perfusion after application lasted 2 minutes in the P1 group, 10 minutes in the P2 and C groups, and 25 minutes in the P3 group. The myocardium of the left ventricle was examined histologically, and the numbers of labeled cells in vessels, myocardium, and combined were determined. The numbers of detected cells in the P1 and C groups were significantly lower than in the P2 and P3 groups. In the P2 and P3 groups, the numbers of cells found distally from the ligation were significantly higher than proximally from the ligation site. Bone marrow mononuclear cells labeled with iron oxide nanoparticles proved the ability to migrate in the myocardium interstitium with significantly higher affinity for the tissue damaged by infarction.

• MeSH
• barvení a značení MeSH
• buňky kostní dřeně metabolismus   patologie   ultrastruktura   MeSH
• časové faktory MeSH
• infarkt myokardu metabolismus   patologie   MeSH
• kinetika MeSH
• koronární cévy metabolismus   patologie   MeSH
• kovové nanočástice MeSH
• králíci MeSH
• leukocyty mononukleární MeSH
• modely nemocí na zvířatech MeSH
• myokard metabolismus   patologie   MeSH
• nanočástice MeSH
• neparametrická statistika MeSH
• perfuze MeSH
• srdce MeSH
• železo metabolismus   MeSH
• zvířata MeSH
• Check Tag
• králíci MeSH
• mužské pohlaví MeSH
• zvířata MeSH