scholarly journals In vitro effects of tyre debris organic extract on the kinetic and morphologic traits of rabbit spermatozoa

2010 ◽  
Vol 17 (4) ◽  
Author(s):  
  Moretti E. ◽  
Dal Bosco A. ◽  
Mourvaki E. ◽  
Cardinali R. ◽  
Collodel G. ◽  
...  
Keyword(s):  
Organic Extract ◽  
In Vitro Effects ◽  
Rabbit Spermatozoa

scholarly journals In Vitro Effects of Pumpkin (Cucurbita moschata) Seed Extracts on Echinococcus granulosus Protoscoleces

2020 ◽  
Author(s):  
Zahra HESARI ◽  
Meysam SHARIFDINI ◽  
Mohammad Kazem SHARIFI-YAZDI ◽  
Saeedeh GHAFARI ◽  
Sara GHASEMI ◽  
...  
Keyword(s):  
Petroleum Ether ◽  
Echinococcus Granulosus ◽  
Cucurbita Moschata ◽  
Total Extract ◽  
Hydroalcoholic Extract ◽  
Organic Extract ◽  
Pumpkin Seeds ◽  
In Vitro Effects ◽  
Seed Extracts

Background: Echinococcus granulosus parasite causes a zoonotic disease which is important for public and veterinary health. Since pumpkin seeds (Cucurbita sp.) are used as traditional vermifuge in Iran, they may be a potential herbal anthelmintic. Methods: This study was designed in 2016 to evaluate the in vitro scolicidal effect of Cucurbita moschata seeds form northern part of Iran. Hydroalcoholic and petroleum ether extracts were prepared by maceration and soxhlet respectively. Both extracts with four different concentrations (100, 10, 1, 0.1 mg/ml) were incubated against protoscoleces in 5, 15, 30 and 60 min. Results: Maximum mortality was 16% with 1% hydroalcoholic extract in 60 min. The highest mortality with organic extract was 4% with 10% concentration in 60 min (P=0.015). Conclusion: Since highest mortality was 16%, the extract did not reach to LD50 (50% mortality). Therefore, the potency of the total extract is not sufficient as potential scolicidal drug.

scholarly journals IN VITRO EFFECTS OF ACINETOBACTER BAUMANNII AND SELECTED NATURAL BIOMOLECULES ON RABBIT SPERMATOZOA MOTILITY

AGROFOR ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Eva TVRDÁ ◽  
Michal ĎURAČKA ◽  
Attila KÁNTOR ◽  
Marek HALENÁR ◽  
Lukáš HLEBA
Keyword(s):  
Sperm Motility ◽  
Negative Impact ◽  
White Male ◽  
Selective Advantage ◽  
Rapid Decline ◽  
Sperm Analysis ◽  
Spermatozoa Motility ◽  
In Vitro Effects ◽  
Rabbit Spermatozoa

The aim of this study was to assess the potential efficiency of selected biologicallyactive substances on the motility behaviour of rabbit spermatozoa subjected to invitro induced A. baumannii contamination. The semen samples used for A.baumannii detection were collected from 10 New Zealand white male rabbits andthe presence of the bacterium was confirmed using MALDI-TOF MassSpectrometry. For the in vitro experiments rabbit spermatozoa were re-suspendedin PBS, containing mineral supplements, BSA and glucose in the presence of 3x105CFU A. baumannii and diverse concentrations of selected biomolecules (resveratrol- RES, quercetin - QUE, curcumin - CUR, epicatechin - EPI, isoquercitrin - ISO).The sperm motility was assessed using the computer-aided sperm analysis at 0h,2h, 4h and 6h. A. baumannii significantly decreased the sperm motility (P<0.001)at Time 2h and maintained this negative impact throughout the in vitro culture.Meanwhile, the motility at Time 2h was significantly higher in the samples subjectedto A. baumannii together with 10 μmol/L RES (P<0.01); 5, 10 and 50 μmol/L QUE(P<0.001); 1 μmol/L CUR (P<0.05); 10, 50 and 100 μmol/L EPI (P<0.01) as well as 50μmol/L (P<0.05) and 100 μmol/L ISO (P<0.001) in comparison to the control exposedto the bacterium exclusively. After 4h, the motility remained significantly higher in thegroups co-treated with the inoculum and 10 μmol/L RES (P<0.05), 50 μmol/L QUE(P<0.05) as well as 50 μmol/L EPI (P<0.05) when compared to the positive control.Nevertheless, none of the biomolecules was effective against the rapid decline ofsperm motility caused by A. baumannii during later stages of the experiment (Time6h). Based on these results, one can conclude that RES, QUE and EPI exhibitantibacterial properties providing a selective advantage to spermatozoa in thepresence of A. baumannii, particularly during short-term rabbit semen handling.

scholarly journals In Vitro Effects of Selected Trichothecenes on the Rabbit Spermatozoa Motility Behavior – A Comparative Study

2016 ◽  
Vol 65 (3-4) ◽  
pp. 21-26
Author(s):  
Eva Tvrdá ◽  
Michal Ďuračka ◽  
Marek Halenár ◽  
Norbert Lukáč ◽  
Adriana Kolesárová
Keyword(s):  
Sperm Motility ◽  
Toxic Substance ◽  
Reproductive Capacity ◽  
Rapid Decline ◽  
Sperm Analysis ◽  
Spermatozoa Motility ◽  
In Vitro Effects ◽  
Rabbit Spermatozoa ◽  
Motility Behavior

Summary This study was designed to describe and compare the time- and dose-dependent in vitro effects of selected trichothecenes (deoxynivalenol-DON, zearalenone-ZEA and T-2 toxin) on the motility behavior of rabbit spermatozoa. The rabbit semen was diluted in PBS supplemented with different concentrations (1, 5, 10, 50, 100 μmol/L) of DON, ZEA or T-2 while the Control carried no mycotoxin. At culture times of 0h, 2h, 4h and 8h, the spermatozoa motility was assessed using the computer-aided sperm analysis (CASA) with the help of the IDENT stain and fluorescent illumination. The motility assessment revealed different behavior patterns, specific and unique to each of the studied mycotoxins. DON exhibited the ability to temporarily increase the sperm motility, followed by its rapid decline at later stages of the experiment (P<0.001). ZEA proved to act as a highly toxic substance on the spermatozoa, causing a rapid decline of the motion and resulting in a fast and complete sperm motility inhibition (P<0.001). Lastly, T-2 revealed to be highly detrimental to the sperm activity even at small concentrations (P<0.001). Our data suggest that further experiments are needed due to the lack of evidence emphasizing the toxinogenic effects of trichothecenes on male reproductive capacity.

Anti-obesity role of Aster glehni extract: in vivo and in vitro effects

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
HM Lee ◽  
TG Ahn ◽  
CW Kim ◽  
HJ An
Keyword(s):  
In Vitro Effects

In Vitro Effects of Urokinase — Prevention by Different Inhibitors

1990 ◽  
Vol 64 (03) ◽  
pp. 402-406 ◽  
Author(s):  
M D Oethinger ◽  
E Seifried
Keyword(s):  
In Vitro Study ◽  
Thrombin Time ◽  
Plasma Samples ◽  
Temperature Dependent ◽  
Chloromethyl Ketone ◽  
Control Value ◽  
Dose Time ◽  
In Vitro Effects ◽  
Full Protection

SummaryThe present in vitro study investigated dose-, time- and temperature-dependent effects of two-chain urokinase plasminogen activato(u-PA, urokinase) on normal citrated plasma. When 10 μg/ml u-PA wereadded to pooled normal plasma and incubated for 30 min at an ambient temperature (25° C), α2-antiplas-min decreased to 8% of the control value. Incubation on ice yielded a decrease to 45% of control,whereas α2-antiplasmin was fully consumed at 37° C. Fibrinogen and plasminogen fell to 46% and 39%, respectively, after a 30 min incubation at 25° C. Thrombin time prolonged to 190% of control.Various inhibitors were studied with respect to their suitability and efficacy to prevent these in vitro effects. Aprotinin exhibited a good protective effect on fibrinogen at concentrations exceeding 500 KlU/ml plasma. Its use, however, was limited due to interferences with some haemostatic assays. We could demonstrate that L-Glutamyl-L-Glycyl-L-Arginyl chloromethyl ketone (GGACK) and a specific polyclonal anti-u-PA-antibody (anti-u-PA-IgG) effectively inhibited urokinase-induced plasmin generation without interfering with haemostatic assays. The anti-u-PA-antibody afforded full protection ofα2-antiplasmin at therapeutic levels of u-PA.It is concluded that u-PA in plasma samples from patients during thrombolytic therapy may induce in vitro effects which should be prevented by the use of a suitable inhibitor such as GGACK or specific anti-u-PA-antibody.

In Vitro Effects of Ethanol on Rabbit Platelet Aggregation, Secretion of Granule Contents, and Cyclic AMP Levels in the Presence of Prostacyclin

1989 ◽  
Vol 61 (02) ◽  
pp. 254-258 ◽  
Author(s):  
Margaret L Rand ◽  
Peter L Gross ◽  
Donna M Jakowec ◽  
Marian A Packham ◽  
J Fraser Mustard
Keyword(s):  
Cyclic Amp ◽  
Inhibitory Effect ◽  
Rabbit Platelet ◽  
Inhibitory Effects ◽  
Low Concentrations ◽  
Rabbit Platelets ◽  
High Concentrations ◽  
In Vitro Effects ◽  
Aggregation Of Platelets

SummaryEthanol, at physiologically tolerable concentrations, inhibits platelet responses to low concentrations of collagen or thrombin, but does not inhibit responses of washed rabbit platelets stimulated with high concentrations of ADP, collagen, or thrombin. However, when platelet responses to high concentrations of collagen or thrombin had been partially inhibited by prostacyclin (PGI2), ethanol had additional inhibitory effects on aggregation and secretion. These effects were also observed with aspirin- treated platelets stimulated with thrombin. Ethanol had no further inhibitory effect on aggregation of platelets stimulated with ADP, or the combination of ADP and epinephrine. Thus, the inhibitory effects of ethanol on platelet responses in the presence of PGI2 were very similar to its inhibitory effects in the absence of PGI2, when platelets were stimulated with lower concentrations of collagen or thrombin. Ethanol did not appear to exert its inhibitory effects by increasing cyclic AMP above basal levels and the additional inhibitory effects of ethanol in the presence of PGI2 did not appear to be brought about by further increases in platelet cyclic AMP levels.

Comparison of Specific Antibody, D-Phe-Pro-Arg-CH2Cl and Aprotinin for Prevention of In Vitro Effects of Recombinant Tissue-Type Plasminogen Activator on Haemostasis Parameters

1987 ◽  
Vol 58 (03) ◽  
pp. 921-926 ◽  
Author(s):  
E Seifried ◽  
P Tanswell
Keyword(s):  
Specific Antibody ◽  
Plasma Concentrations ◽  
Fibrinolytic Therapy ◽  
Tissue Type ◽  
Control Value ◽  
Type Plasminogen Activator ◽  
In Vitro Effects ◽  
Fibrinolytic Parameters

SummaryIn vitro, concentration-dependent effects of rt-PA on a range of coagulation and fibrinolytic assays in thawed plasma samples were investigated. In absence of a fibrinolytic inhibitor, 2 μg rt-PA/ml blood (3.4 μg/ml plasma) caused prolongation of clotting time assays and decreases of plasminogen (to 44% of the control value), fibrinogen (to 27%), α2-antiplasmin (to 5%), FV (to 67%), FVIII (to 41%) and FXIII (to 16%).Of three inhibitors tested, a specific polyclonal anti-rt-PA antibody prevented interferences in all fibrinolytic and most clotting assays. D-Phe-Pro-Arg-CH2Cl (PPACK) enabled correct assays of fibrinogen and fibrinolytic parameters but interfered with coagulometric assays dependent on endogenous thrombin generation. Aprotinin was suitable only for a restricted range of both assay types.Most in vitro effects were observed only with rt-PA plasma concentrations in excess of therapeutic values. Nevertheless it is concluded that for clinical application, collection of blood samples on either specific antibody or PPACK is essential for a correct assessment of in vivo effects of rt-PA on the haemostatic system in patients undergoing fibrinolytic therapy.

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