State of hormonal regulation in experimental animals exposed to noise and vibration

Author(s):  
A. V. Lizarev ◽  
V. A. Pankov

When exposed to noise and vibration in experimental animals there was a decrease in the content of threeiodinethyronine, thyroxin and adrenocorticotropic hormone in blood plasma after 15 and 30 days of experience. An increase in loads led to an increase in the level of threeiodinethyronine and thyroxin under vibration exposure and was normalized with noise. The content of adrenocorticotropic hormone leveled in both cases.

1950 ◽  
Vol 162 (1) ◽  
pp. 182-188 ◽  
Author(s):  
J. H. Meyer ◽  
R. R. Grunert ◽  
Marie T. Zepplin ◽  
R. H. Grummer ◽  
G. Bohstedt ◽  
...  

Talanta ◽  
2021 ◽  
Vol 225 ◽  
pp. 121900
Author(s):  
Lukasz Oldak ◽  
Anna Sankiewicz ◽  
Beata Żelazowska-Rutkowska ◽  
Bogdan Cylwik ◽  
Zenon Lukaszewski ◽  
...  

1953 ◽  
Vol 204 (1) ◽  
pp. 147-152 ◽  
Author(s):  
Shirley F. McCann ◽  
M. Laskowski

Author(s):  
Jacek Wawrzykowski ◽  
Monika Jamioł ◽  
Wioleta Mojsym ◽  
Marta Kankofer

AbstractPhysiological balance between pro- and antioxidative processes is crucial for placentation and further development of fetus and placenta. Parameters of pro- and antioxidative profile may serve as markers of proper course of pregnancy. The aim of study was to assess whether the balance between pro- and antioxidative parameters during placentation phase in bovine placenta is maintained. Placental and blood samples were collected from healthy, HF, pregnant (2nd-3rd month) cows (n = 8) in slaughterhouse and in farm, respectively. Formylokinurenine and bityrosine content were measured spectrofluorimetrically in blood plasma and tissue homogenates while metabolites of lipid peroxidation, total antioxidant capacity, SH groups and activity of antioxidative enzymes (glutathione peroxidase and superoxide dismutase) were determined in examined tissues by spectrophotometry. Western blotting was used to confirm the presence of enzymatic proteins in placenta. Results: Local profile in tissues was more pronounced than general profile in blood plasma. Activities of antioxidative enzymes were significantly (p < 0.05) higher in 2nd compared to 3rd month of pregnancy in maternal part of placenta while prooxidant parameters showed opposite relationship. Obtained results showed significant differences when compared to data from non-pregnant animals or time of parturition. Further studies are necessary for elucidation of placentation phase in cows.


2020 ◽  
Author(s):  
Artem V. Baklykov ◽  
Konstantin A. Chistiakov ◽  
Dmitry S. Kopchuk ◽  
Grigory V. Zyryanov ◽  
Gennady L. Rusinov ◽  
...  
Keyword(s):  

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1057.1-1057
Author(s):  
S. Bedina ◽  
A. Trofimenko ◽  
E. Mozgovaya ◽  
M. Mamus ◽  
S. Spitsina

Background:Rheumatoid arthritis (RA) is a systemic autoimmune disease characterized by the presence of rheumatoid factor (RF) and anticitrulline autoantibodies. Recent evidences suggest that impairment of neutrophil extracellular traps (NETs) could exert substantial influence on RA pathogenesis. The production of NETs depends heavily on the ROS generation. One of its mechanisms is xanthine oxidoreductase (XOR) mediated degradation of purine metabolites. Analysis of pro-oxidant activity of the enzymatic complex XOR and its constituents, xanthine oxidase (XO) and xanthine dehydrogenase (XDG), is an issue of considerable interest in this context.Objectives:Evaluation of XO and XDG activities in RF-positive and RF-negative RA using both plasma and lysed lymphocyte samples.Methods:The research was carried out in agreement with the WMA Declaration of Helsinki principles. Diagnosis of RA had been verified using ACR/EULAR 2010 criteria. Enzymatic activities in plasma and lymphocytes were measured spectrophotometrically and expressed as nmol/min/ml. Enzymatic activities in lymphocytes were also normalized to 1×107 cells/ml. Statististical tests were selected in line with common guidelines. Differences were considered significant when p<0.05. Reference ranges were calculated as means ±2SD.Results:75 adult RA patients (52 females and 23 males, mean age 43.9±0.97 years, mean disease duration 8.5±0.3 years) from the rheumatology unit of Volgograd Clinical Emergency Hospital #25 as well as 35 healthy controls were included in the study. RF-positive RA and RF-negative RA were observed in 49 (65.3%) and 26 (34.7%) patients, respectively. Reference ranges for plasma and lymphocyte XO activities were 2.60-3.96 and 14.2-27.8 nmol/min/ml, respectively. Similar ranges for XDG activities were 4.49-5.93 and 22.5-40.7 nmol/min/ml, respectively. Enzymatic profile of RA patients is characterized by significantly increased XO activity in plasma and decreased XO and XDG activities in lymphocytes (р<0.001). XO activity is increased (p<0.001), XDG activity is decreased (p<0.001) in blood plasma of patients with RF-negative RA, while the activity of both enzymes is decreased in lymphocytes (p<0.001). XO activity (p<0.001) and XDG activity (p<0.05) is increased in blood plasma, XO activity and XDG activity are decreased (p<0.001) in lymphocytes of patients with RF-positive RA. Plasma XO and XDG activities are also higher, and lymphocyte XO and XDG activities are lower in patients with RF-positive RA than in patients with RF-negative RA (р<0.001).Conclusion:Our study revealed the relationship between enzyme parameters and rheumatoid factor presence. More pronounced changes in the enzyme activities were observed in patients with RF-positive RA. These results demonstrate that activation of the xanthine oxidase/xanthine dehydrogenase enzyme complex is an substantial factor of induction and continuation of the autoimmune rheumatoid inflammation.Disclosure of Interests:None declared


Author(s):  
Robert D. Crapnell ◽  
Whitchuta Jesadabundit ◽  
Alejandro García-Miranda Ferrari ◽  
Nina C. Dempsey-Hibbert ◽  
Marloes Peeters ◽  
...  

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