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Experimental smooth muscle antibodies.
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Attempts were made to induce smooth muscle antibody (SMA) in rats by various procedures causing cell necrosis. Ligation of a liver lobe and cryosurgical damage to a liver lobe both resulted in subsequent appearance of SMA, provided the damage tissue was not removed. Transfer of the damaged liver
Oxyhemoglobin produces necrosis in cultured smooth muscle cells.
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OBJECTIVE
Myonecrosis in the tunica media, which is defined morphologically, is one of the most striking alterations in the cerebral arterial wall following subarachnoid hemorrhage (SAH). In this study, oxyhemoglobin (OxyHb) was added to cultured rat aortic smooth muscle cells to determine the
TRAIL expression in vascular smooth muscle.
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TRAIL is a cell-associated tumor necrosis factor-related apoptosis-inducing ligand originally identified in immune cells. The ligand has the capacity to induce apoptosis after binding to cell surface receptors. To examine TRAIL expression in murine vascular tissue, we employed in situ hybridization
Oxyhemoglobin produces apoptosis and necrosis in cultured smooth muscle cells.
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Confluent rat aortic smooth muscle cells were treated with OxyHb in a concentration- and time-dependent manner. A high concentration of OxyHb (100 microM) within 24 h decreased cell density. DNA analysis showed a smear pattern characteristic of cell necrosis. Transmission electron microscopy
HSP20 phosphorylation and airway smooth muscle relaxation.
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HSP20 (HSPB6) is a small heat shock protein expressed in smooth muscles that is hypothesized to inhibit contraction when phosphorylated by cAMP-dependent protein kinase. To investigate this hypothesis in airway smooth muscle (ASM) we showed that HSP20 was constitutively expressed as well as being
Smooth muscle tumours presenting as pleural neoplasms.
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Five smooth muscle tumours presenting as pleural neoplasma are presented. The patients were three women and two men aged between 21 and 69 years (mean = 45 years). Clinically, one patient presented with chest pain, one with empyema and the other three were asymptomatic. Two of the tumours were
Fascin expression in uterine smooth muscle tumors.
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CONCLUSIONS
The diagnosis of malignant, uncertain malignant potential, and benign uterine smooth muscle tumors is derived from histologic criteria such as tumor cell necrosis, mitotic activity, and cytologic atypia. Morphologically, some variants of leiomyoma can be confused with leiomyosarcoma
Sarcoglycans in vascular smooth and striated muscle.
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Sarcoglycans are transmembrane proteins important in the maintenance of proper muscle function. Together, the sarcoglycans form a heteromeric complex that interacts with dystrophin, dystroglycan, and filamin C to form a mechanosignaling complex. Mutations in the genes encoding sarcoglycan can
Epstein-Barr Virus-Associated Smooth Muscle Tumor.
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Immunodeficient individuals are prone to develop a number of opportunistic infections and unique neoplasms. Epstein-Barr virus-associated smooth muscle tumor is an uncommon neoplasm associated with immunodeficiency. It has been described in patients infected with human immunodeficiency virus, in the
Pathologic considerations of uterine smooth muscle tumors.
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Smooth muscle tumors are the most common type of uterine neoplasm. The vast majority of such tumors are benign leiomyomas. Leiomyosarcomas fortunately are relatively infrequent. A variety of gross and microscopic features may be found in both benign and malignant tumors and great care must be taken
T lymphocytes adhere to airway smooth muscle cells via integrins and CD44 and induce smooth muscle cell DNA synthesis.
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Asthma is a disease of airway inflammation and hyperreactivity that is associated with a lymphocytic infiltrate in the bronchial submucosa. The interactions between infiltrating T lymphocytes with cellular and extracellular matrix components of the airway and the consequences of these interactions
Vascular smooth muscle cells cultured on elastin membranes.
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Smooth muscle cells from thoracic aortas of 12-week-old rats were cultured on elastin membranes for up to 21 days. The cell cultures were examined using light microscopy, transmission and scanning electron microscopy. The contractile phenotype characteristic for resident arterial wall muscle cell
Inducible nitric oxide synthase in vascular smooth muscle.
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Nitric oxide is a multifunctional regulator of the vascular system. In healthy blood vessels, nitric oxide is produced from L-arginine by the constitutive nitric oxide synthase in endothelial cells. In addition, vascular injury or inflammation cause the production of nitric oxide in most types of
Smooth Muscle Tumors of the Female Genital Tract.
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Smooth muscle tumors are the most common among mesenchymal tumors in the female genital tract. The vast majority of these neoplasms are clinically benign and easy to diagnose. In contrast, leiomyosarcomas are highly aggressive tumors that may pose considerable diagnostic problems when they display
Primary smooth muscle tumors of the thyroid gland.
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BACKGROUND
Primary smooth muscle tumors of the thyroid gland are rare. To date, there are few cases reported of primary thyroid leiomyomas and leiomyosarcomas.
METHODS
One leiomyoma and four leiomyosarcomas arising within the thyroid gland were identified in the files of the Endocrine Tumor Registry
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