A comparison of endothelium-dependent relaxation in omental and myometrial resistance arteries in pregnant and nonpregnant

Article Abstract:

Abdominal arteries may have a greater relaxation response to bradykinin than uterine arteries in both pregnant and nonpregnant women. Researchers obtained omental (abdominal) and uterine muscle arteries from 22 pregnant and 27 nonpregnant women. Arteries were constricted with vasopressin, and then relaxed with bradykinin. Omental arteries relaxed more than did uterine muscle arteries in both pregnant and nonpregnant women. No difference was seen in the blood vessel relaxation response between pregnant and nonpregnant women.

Blood vessels, Vasodilation

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Myoendometrial versus placental uterine arteries: structural, mechanical, and functional differences in late-pregnant rabbits

Article Abstract:

Different blood flow needs in the placenta compared to the uterine lining may explain the differences seen in the physical characteristics of these two vessel types in pregnant rabbits. Pressurized muscle tone measurements and depressurized size measurements were performed on blood vessels from the placenta and uterine lining of 12 New Zealand White rabbits. Uterine wall vessels had stronger muscle tone than placental vessels. Placental vessels, however, had thicker walls and significantly wider diameters.

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Apoptosis is a rare event in first-trimester placental tissue

Article Abstract:

Researchers used transmission electron microscopy to confirm that cell death does not occur in placental tissue during the first trimester. They also found that terminal uracil nick end-labeling (TUNEL) staining was not an accurate measure of cell death in placental tissue.

Research, Cell death, Placenta

Similar abstracts:

• Abstracts: A comparison of myogenic and endothelial properties of myometrial and omental resistance vessels in late pregnancy

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