title: Morphology and Ploidy of Smooth Muscle Cells in Chorionic Arteries under Different Hemodynamic Conditions.
abstract: Smooth muscle cells from the arterial wall of placental chorion were studied at 39-40-week gestation. The content of mono- and binuclear tetraploid myocytes was higher in sites of arterial branching and turns (27.3% vs. 4.4% straight parts of the arteries; DNA cytophotometry data). Mitoses were found only in these arterial regions (0.18%). Regional changes in the sizes of diploid and polyploid myocytes were detected, associated with the blood flow pattern in the chorion; myocyte hypertrophy was 17-fold more incident in sites of arterial turns and branching than in straight arteries. Possible causes of changes in the proliferative characteristics and subsequent growth of the chorionic arterial wall myocytes are discussed.
authors.affiliation: Department of Histology, Cytology and Embryology, Department of Pathological Anatomy with a Course of Clinical Pathology, Yaroslavl State Medical University, Ministry of Health of the Russian Federation, Yaroslavl, Russia. profang@mail.ru.
authors.forename: A N
authors.initials: AN
authors.lastname: Gansburgskii
authors.affiliation: Department of Histology, Cytology and Embryology, Department of Pathological Anatomy with a Course of Clinical Pathology, Yaroslavl State Medical University, Ministry of Health of the Russian Federation, Yaroslavl, Russia.
authors.forename: A V
authors.initials: AV
authors.lastname: Yal'tsev
mesh_terms: D001158:Arteries / Q000166:cytology*; D001783:Blood Flow Velocity; D002467:Cell Nucleus / Q000648:ultrastructure*; D002469:Cell Separation / Q000379:methods; D048430:Cell Shape; D002823:Chorion / Q000098:blood supply* / Q000166:cytology; D004247:DNA / Q000737:chemistry; D005260:Female; D006801:Humans; D008940:Mitotic Index; D032389:Myocytes, Smooth Muscle / Q000166:cytology*; D010641:Phenotype; D010920:Placenta / Q000098:blood supply* / Q000166:cytology; D011003:Ploidies; D011247:Pregnancy; D061251:Primary Cell Culture
chemical_list: D004247:DNA
keywords: chorionic arteries; hyperplasia; hypertrophy; polyploidy; smooth muscle cells