Comparison of the porcine uterine smooth muscle contractility on days 12–14 of the estrous cycle and pregnancy
| Autor: | W. Markiewicz, Jerzy Jan Jaroszewski, Michał Blitek, M. Bogacki |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Biogenic Amines
medicine.medical_specialty 040301 veterinary sciences Sus scrofa Uterus Gilts Estrous Cycle Biology Oxytocin Endometrium 0403 veterinary science Contractility 03 medical and health sciences Uterine contractility 0302 clinical medicine Pregnancy Internal medicine medicine Animals Early pregnancy Estrous cycle 030219 obstetrics & reproductive medicine General Veterinary Research Embryos Myometrium Uterine horns 04 agricultural and veterinary sciences General Medicine Smooth muscle contraction medicine.anatomical_structure Endocrinology Prostaglandins Female medicine.symptom Muscle Contraction Muscle contraction |
| Zdroj: | Acta Veterinaria Scandinavica |
| ISSN: | 1751-0147 |
| DOI: | 10.1186/s13028-016-0201-z |
| Popis: | Background Uterine contractile activity is very important for many reproductive functions including embryo transport, implantation, gestation and parturition. Abnormal contractility leads to implantation failure, spontaneous miscarriage, preterm birth and many other disorders. The objective of the present study was to assess the effects of acetylcholine (ACh), noradrenaline (NA), oxytocin (OT) and prostaglandins F2α (PGF2α) and E2 (PGE2) on the contraction of uterine strips collected from the horns of cyclic gilts (12–14 days of the estrous cycle—group I) and from pregnant (12–14 days after first insemination gilts in which one of the uterine horn was gravid (group IIa) and the second one was non-gravid (group IIb). Uterine strips consisting of the endometrium with the myometrium and myometrium alone were examined. Results ACh increased the tension in all groups as compared to the pretreatment period, and the increase was the highest in group IIb; the amplitude decreased in all groups, and the frequency increased mainly in groups I and IIa. NA did not affect the tension in any group, but decreased the amplitude and frequency in group IIb as compared to groups I and IIa. OT caused the highest increase in the tension in group IIb, a decrease in the amplitude and an increase in the frequency of contractions as compared to the pretreatment period. PGF2α induced the highest increase in the tension and amplitude in group IIb, with a decline in the frequency in this group. PGE2 increased the tension and frequency only in group IIb, and caused the greatest eduction in the amplitude in this group. Conclusions These results indicate that contractility of the porcine smooth muscle collected from uterine horns with embryos was different from those obtained from the uterine horns without embryos and the horns of cyclic gilts. |
| Databáze: | OpenAIRE |
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