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Unphosphorylated smooth muscle myosin filaments do not disassemble in MgATP, provided that the solution is supplemented either by 25% serum albumin or by 6% polyethylene glycol 6000. These filaments are able to support actomyosin retraction but their ATPase activity is not activated by
In studies on metabolism of vascular smooth muscle, it was observed that incubation of intact porcine carotid artery strips with 3% bovine or porcine serum albumin had profound effects on the oxidation of substrates and O2 consumption. Arteries incubated over 180 min with charcoal-treated and
Aerobic organisms are continually subjected to environmental stressors that compromise redox homeostasis and induce cellular injury. In vascular smooth muscle cells (vSMCs), the activation/repression of redox-regulated genes after environmental stress often involves protein binding to cis-acting
The possibility to load submicrometer porous titanium surfaces with relatively small proteins, albumin and immunoglobulin G (IgG) was investigated. The loading ability is of interest due to the possibility of slow release of molecules from biomaterial surfaces, and may be important for the
Nonenzymatic glycation is increased in diabetes. The role of advanced glycation end products has been implicated in many of the complications of diabetes, whereas the effects of early-glycation Amadori-modified proteins on vascular cells alone are poorly defined. In the present study, we show that
Myoglobin (Mb) has been believed to be absent generally from mammalian smooth muscle tissue. Examination of human rectal, uterine, bladder, colon, small intestine, arterial, and venous smooth muscle by immunohistochemical techniques shows that each of these tissues is immunopositive for both smooth
Immunohistochemical analysis of surgically obtained porcine tissue samples reveals ubiquitous staining for prothrombin in organs rich in smooth muscle content and universal staining of smooth muscle in tissue vasculature. The native character of tissue prothrombin is verified first by chromogenic
In the presence of serum albumin, the enzyme human plasma lipase produces a slow contraction of smooth muscle. This effect was not antagonized by antazoline or by atropine, and was completely abolished by heating the enzyme prepartion for 1 min at 60 degrees C. Calcium ions were found to potentiate
Localization of serum albumin in the striated and smooth muscles of rat was studied by an improved immunocytochemical method. Diaphragm, ventricular myocardium, and smooth muscle of stomach were examined. In all of these tissues, albumin was found in the interstitial space and small subsarcolemmal
Serum contains many biologically active factors influencing cell growth and is commonly used as a culture medium supplement. It has not generally been appreciated that serum can affect vascular tone. We have observed that the contractile response of aortic rings previously exposed to 10% fetal
Anionic microdomains within the aortic smooth muscle cell (SMC) surface glycocalyx represent a potential barrier to the endocytosis of anionic plasma proteins. Cultured SMCs exposed briefly to cationized ferritin (CF) exhibit ultrastructural aggregations of surface anionic sites resulting in
Tobacco glycoprotein (TGP) purified from flue-cured tobacco leaves, tar-derived material (TAR), the water soluble, nondialyzable, delipidized extract of cigarette smoke condensate, rutin-bovine serum albumin conjugates, quercetin, and chlorogenic acid are mitogenic for bovine aortic smooth-muscle
Experiments were carried out to determine if active or passive sensitization and resensitization influence resting membrane potential (Em) and contractile response of airway smooth muscle from tracheal muscle. In active sensitization, Camm-Hartley male guinea pigs were injected with 1 cc of
Mouse peritoneal macrophages were cultured for 24 h in Dulbecco-Vogt medium containing 10% calf serum. This medium was replaced with Dulbecco-Vogt medium containing 1% bovine serum albumin to which all subsequent additions were made. Medium changes, accompanied by appropriate additions, were made
We have studied the effects of liquids of various osmolalities and temperatures on the tracheal vasculature, smooth muscle tone, and transepithelial albumin flux. In 10 anesthetized dogs a 10- to 13-cm length of cervical trachea was cannulated to allow instillation of fluids into its lumen. The