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Age‐related changes in contractions of chicken aorta and ischiadic artery
Author(s) -
ABE Asaki,
OHTSUKI Kazumasa,
SUZUKI Yoshiki,
TAKAHASHI Takiko,
KONDO Yasuhiro
Publication year - 2002
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1046/j.1344-3941.2002.00042.x
Subject(s) - contraction (grammar) , aorta , thoracic aorta , artery , smooth muscle , vascular smooth muscle , medicine , anatomy , muscle contraction , cardiology , age groups , demography , sociology
The characteristics of the contraction of vascular smooth muscle were examined in thoracic aorta and ischiadic artery of chickens aged 3, 6, 10 and 18 weeks. High K + solution induced a sustained contraction in smooth muscle preparations of aorta and ischiadic artery in vitro . The contraction of the ischiadic artery became greater with age, whereas the contraction of the aortic preparation did not. In the ischiadic artery, the magnitude of the contraction divided by the weight of the muscle preparation was constant at all ages studied. However, those in the aortic preparation decreased with age. These results suggest that the changes in the contractile responses of vascular smooth muscle owing to the age of chickens vary widely according to the preparations of blood vessels, and that the functional smooth muscle cells in the thoracic aorta of chicken do not increase with age.