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Abstract

Oxidative stress (OxS) has been implicated in the pathogenesis of Crohn’s disease (CD). The aim of this study was to examine whether nonenzymatic antioxidants are associated with active CD, by using the FRAP and GSH assay in plasma. Additionally, we measured bilirubin and albumin levels as two individual components of the plasma antioxidant system. A total of 55 patients with established CD, 30 with active CD and 25 with inactive disease, and 25 healthy individuals were prospectively enrolled in this study. We evaluated CD activity index, BMI and blood morphology, platelet count, serum CRP level, and bochemical parameters of OxS: ferric reducing ability of plasma (FRAP), reduced glutathione (GSH) in plasma and bilirubin and albumin levels in serum. Plasma FRAP and GSH concentrations were decreased in both CD groups compared to controls and negatively correlated with CDAI values (FRAP: r = –0.572, p = 0.003; GSH: r = –0.761, p = 0.001), CRP and platelet count. Bilirubin and albumin levels were lower in the serum of active CD patients than inactive CD patients and controls and negatively correlated with the CD activity index (r = –0328, p = 0.036, r = –0.518, p = 0.002) and CRP (r = –0.433, p = 0.002). The decreased FRAP and GSH levels in plasma and bilirubin and albumin levels in serum of patients with active CD compared to inactive CD and controls underlines the importance of OxS in the pathophysiology and activity of CD.

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Authors and Affiliations

Katarzyna Szczeklik
Wirginia Krzyściak
Dorota Cibor
Kamil Kozioł
Halina Pocztar
Jolanta Pytko-Polończyk
Tomasz Mach
Danuta Owczarek
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Abstract

This study aimed to identify bacterial pathogens in milk samples from dairy cows with subclinical and clinical mastitis as well as to assess the concentrations of oxidant-antioxidant parameters [malondialdehyde (MDA), reduced glutathione (GSH), and total GSH levels] in both blood and milk samples. From a total of 200 dairy cows in 8 farms, 800 quarter milk samples obtained from each udder were tested in the laboratory for the presence of udder pathogens. Cultivated bacteria causing intramammary infection from milk samples were identified by Matrix-Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF). In addition, from tested animals 60 cows were selected includıng 20 healthy cows that were CMT negative, 20 cows with subclinical mastitis (SM), and 20 cows with clinical mastitis (CM) for detection of MDA, GSH, and total GSH levels in blood and milk samples. Three hundred and eighty (47.5%; 380/800), 300 (37.5%; 300/800), and 120 (15%; 120/800) of milk samples, respectively were CMT positive or SM and CM, and those positives were cows from different farms. We observed that 87.4% (332/380), 25.3% (76/300), and 34.2% (41/120) of cows with CMT positive, CMT negative, and CM had bacterial growth. The most predominantly identified bacteria were Staphylococcus chromogenes (18.7%) obtained mainly from SM and Staphylococcus aureus (16.7%) as the most frequent cause of CM. According to our results, dairy cows with CM had the highest MDA levels, the lowest GSH, and total GSH levels in both blood and milk samples however, high MDA levels and low GSH levels in milk samples with SM were observed. Based on our results, lipid oxidant MDA and antioxidant GSH could be excellent biomarkers of cow’s milk for developing inflammation of the mammary gland. In addition, there was no link between nutrition and MDA and GSH levels.
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Bibliography


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Authors and Affiliations

G. Ozbey
1
Z. Cambay
1
S. Yilmaz
2
O. Aytekin
1
F. Zigo
3
M. Ozçelik
1
B. Otlu
4

  1. Department of Medical Services and Techniques, Vocational School of Health Services, Firat University, Rectorate Campus, 23119, Elazig, Turkey
  2. Department of Biochemistry, Faculty of Veterinary Medicine, Firat University, Rectorate Campus, 23119, Elazig, Turkey
  3. Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, Košice, 04001, Slovakia
  4. Department of Medical Microbiology, Faculty of Medicine, Inonu University, Main Campus, 44280, Battalgazi, Malatya, Turkey
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Abstract

The development of in vitro embryo production (IVEP) techniques in Felis catus is a fitting model with potential application to the conservation of endangered felid species. To improve the quality of IVEP techniques an appropriate balance of pro- and antioxidants should be provided. Under in vitro conditions, high levels of superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) mRNA provide a defence mechanism against oxidative stress for embryos. In order to improve the development of cat oocytes, the effects of SOD and CAT supplemented to in vitro maturation (IVM) medium and of GPx supplemented to in vitro fertilization (IVF) medium on development and embryo production in vitro were evaluated. Data showed an increase of 70 and 77 % of cleaved embryo and blastocyst formation, respectively, in the experiment with SOD and CAT addition to IVM medium; in the experiment with GPx addition to IVF medium the number of cleaved embryos doubled and the number of embryos increased by 96 %. Therefore, our results were positive and encourage us to continue studies on cat oocytes evaluating the effects of various dosages and combination of antioxidants.

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Authors and Affiliations

N. Cocchia
S. Tafuri
C. Del Prete
V. Palumbo
L. Esposito
L. Avallone
F. Ciani
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Abstract

The aim of this study was to compare the effect of parenteral and oral supplementation of Selenium (Se) and vitamin E (VTE) on selected antioxidant parameters in blood and colostrum as well as their effect on the incidence of mastitis in dairy cows during the final phase of gravidity (6 weeks) and first two weeks after calving. For the practical part of the study 36 dairy cows of Slovak pied breed in the second to fourth lactation-gestation cycle were selected. The animals weredivided into three groups: the control (C) and two experimental groups (D1 and D2). The selected groups were treated as follows: in group D1 products containing Se (Selevit inj.) and vitamin E (Erevit sol. inj.) were administered intramuscularly twice, six and three weeks prior to parturition; in group D2 a vitamin-minerals supplement in the form of sodium selenite (Na2SeO3) and dl-α-tocopherol acetate were supplemented orally for six weeks calving. The blood samples were collected from the vena jugularis in dairy cows approximately 42 days before calving (control sampling), on parturition day, and the 14th day after calving. Higher concentrations of Se and VTE were found in the blood plasma samples of both experimental groups collected on the day of parturition. In addition, the orally supplemented group (D2) showed higher Se and α-tocopherol concentrations in blood plasma on the14th day after calving as well a reduction of occurrence of mastitis by about 25 % compared to the control group. The relationship between inflammatory response and oxidative stress was also confirmed. The concentrations of milk malondialdehyde indicating lipid peroxidation during mastitis were significantly higher in milk samples from infected cows than in milk samples from healthy animals in each monitored group. In order to prevent oxidative stress and moderate inflammatory response in dairy cows it is very important to optimally balance their nutritive needs with an appropriate ratio of Se and VTE supplements. Therefore we still recommend supplementation of the cows’ postpartum dietwith 0.5 mg of Se/kg dry matter (DM) and 102 mg of dl-α-tocopherol acetate/kg DM to stabilize their optimal blood levels, stimulate the activity of glutathione peroxidase and reduce the incidence of mastitis.
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Bibliography

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Turk R, Koledic M, Macesic N, Benic M, Dobranic V, Duricic D, Urbani A, Mestric ZF, Soggiu A, Bonizzi L, Roncada P (2017) The role of oxidative stress and inflammatory response in the pathogenesis of mastitis in dairy cows. Mljekarstvo 67: 91-101.
Zigo F, Vasil’ M, Ondrašovičová, S, Výrostková J, Bujok J, Pecka-Kielb E (2021) Maintaining optimal mammary gland health and prevention of mastitis. Front. Vet. Sci. 8: 607311.
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Authors and Affiliations

M. Vasiľ
1
F. Zigo
1
Z. Farkašová
1
E. Pecka-Kielb
2
J. Bujok
2
J. Illek
3

  1. Department of Nutrition and Animal Husbandry, University of Veterinary Medicine and Pharmacy in Kosice, Komenského 73, Košice, 04001, Slovakia
  2. Department of Biostructure and Animal Physiology, Wroclaw University of Environmental and Life Sciences, Norwida 31, 50-375 Wroclaw, Poland
  3. Large Animal Clinical Laboratory, Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
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Abstract

Meloidogyne arenaria belongs to root-knot nematodes (RKNs) which constitute a group of highly polyphagous nematodes causing serious damages to many crop varieties. Maize ( Zea mays) is one of its main hosts. During plant response to RKN infection, many mechanisms are involved. Pathogenesis-related proteins (PRs), which present many functions and enzymatic activities, such as ribonucleases (RNases), antioxidative enzymes, or proteases are involved in these processes. The aim of this study was to describe changes in peroxidase and RNase activities induced in Z. mays during its response to M. arenaria infection. Moreover, proteins potentially responsible for peroxidase activity were indicated. RNase and peroxidase activities were tested on proteins extracted from roots of healthy plants, M. arenaria infected plants, and healthy plants mixed with M. arenaria juveniles, in native polyacrylamide (PAA) gels. Samples were collected from two varieties of maize at four time points. A selected fraction showing peroxidase activity was excised from the gel and analyzed using mass spectrometry (MS) to determine protein factors responsible for enzymatic activity. As a result, the analyzed varieties showed slight differences in their RNase and peroxidase activities. Higher activity was observed in the Tasty Sweet variety than in the Waza variety. There were no significant differences between healthy and infected plants in RNase activities at all time points. This was in contrast to peroxidase activity, which was the highest in M. arenaria-infected plants 15 days after inoculation. On the basis of protein identification in excised gel fractions using MS it can be assumed that mainly peroxidase 12 is responsible for the observed peroxidase activity. Moreover, peroxidase activity may be presented by glutathione-S-transferase as well.
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Authors and Affiliations

Arnika Przybylska
1
ORCID: ORCID

  1. Department of Molecular Biology and Biotechnology, Institute of Plant Protection − National Research Institute, Poznań, Poland
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Abstract

Background: Despite advanced research and great progress in understanding the chronic pancreatitis (CP) pathogenesis, no current causal treatment for the condition is available. For preclinical studies, the existence of a well-characterized CP animal model is essential.
The aim of the study was to assess the impact of chronic pancreatitis on the antioxidant enzymes activity in rat blood serum and on the level of glutathione (intracellular antioxidant) in rat pancreas.
Methods: The experiments were carried out on the Wistar Kyoto rats in two groups: control and study group (CP), in which chemical induction of pancreatitis with dibutyl dichloride was performed. Serum enzyme activities of amylase, lipase, catalase and superoxide dismutase were analyzed. The levels of the following biochemical parameters were also investigated: total protein, albumin, calcium, magnesium, and triglycerides. Levels of low-molecular-weight thiols: reduced (GSH) and oxidized (GSSG) glutathione, were determined in pancreatic homogenates.
Results: Histopathological imaging of rat pancreatic parenchyma with induced inflammation confirmed focal lymphocytic interstitial chronic pancreatitis with fibrosis features and mild parenchymal atrophy, as well as pancreatic islets degeneration. In the CP group, we observed a statistically significant decrease in serum amylase and lipase activities and in total protein/albumin levels. Also, the elevated catalase activity was registered. In CP rats’ tissues, we observed a 15-fold reduction in GSH levels. The other examined parameters remained unchanged. Clinically relevant are hypoalbuminemia and a moderate decrease in lipase activity. The described changes are most probably indicative of the impaired exocrine pancreas function, however without organ failure features.
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Authors and Affiliations

Patrycja Bronowicka-Adamska
1
Tomasz Hutsch
2
Dominika Szlęzak
1
Anna Bentke-Imiolek
1
Kinga Kaszuba
1
Piotr Ceranowicz
3
Beata Kuśnierz-Cabala
1

  1. Chair of Medical Biochemistry, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
  2. Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw, Poland
  3. Department of Physiology, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
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Abstract

Nanotechnology has been widely applied in agriculture, and understanding of the mechanisms of plant interaction with nanoparticles (NPs) as environmental contaminants is important. The aim of this study was to determine the effects of foliar application of cobalt oxide (Co3O4) NPs on some morpho-physiological and biochemical changes of canola (Brassica napus L.) leaves. Seeds were sown in plastic pots and grown under controlled conditions. Fourteen-day-old seedlings were sprayed with different concentrations of Co3O4 NPs (0, 50, 100, 250, 500, 1000, 2000, and 4000 mg L-1) at weekly intervals for 5 weeks. Growth parameters of the shoot (length, fresh and dry weights) were stimulated by low concentrations of Co3O4 NPs (50 and 100 mg L-1) and repressed by higher concentrations. Similar trends were observed in photosynthetic pigment contents. The results indicated that high concentrations of Co3O4 NPs increased lipoxygenase (LOX) activity and the malondialdehyde (MDA), hydrogen peroxide (H2O2), and dehydroascorbate (DHA) contents, but reduced the membrane stability index (MSI), ascorbate (ASC), and glutathione (GSH). Despite the increase of antioxidant capacity (DPPH) and the accumulation of nonenzymatic antioxidants (total flavonoids and flavonols) and osmolytes (proline, glycine betaine (GB) and soluble sugars) at high concentrations of Co3O4 NPs, the growth and photosynthesis were reduced. The defence system activity did not seem to be sufficient to detoxify reactive oxygen species (ROS). Altogether, high concentrations of Co3O4 NPs showed a phytotoxic potential for canola as an oilseed crop.

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Authors and Affiliations

Malihe Jahani
Ramazan Ali Khavari-Nejad
Homa Mahmoodzadeh
Sara Saadatmand

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