Сторінка 1 від 41 результати
OBJECTIVE
3-[123I]iodo-alpha-methyl-L-tyrosine ([123I]IMT) is an imaging agent for amino acid transport. In order to obtain fundamental data related to tumor imaging with [123I]IMT and renal physiological accumulation of [123I]IMT, we investigated the transport characteristics of [125I]IMT in
The shear-induced intracellular signal transduction pathway in vascular endothelial cells involves tyrosine phosphorylation and activation of mitogen-activated protein (MAP) kinase, which may be responsible for the sustained release of nitric oxide. MAP kinase is known to be activated by reactive
To study the signal transduction mechanisms by which ultraviolet B (UVB) leads to increased prostaglandin E2 (PGE2) synthesis, human epidermal cultures were irradiated with 30 mJ/cm2 UVB and assayed for 6-h cumulative PGE2. Supernatants from irradiated cultures showed a 4-fold increase in PGE2
We used the specific tyrosine kinase inhibitor genistein to define the involvement of tyrosine phosphorylation in the regulation of chloride transport in the rectal gland of the dogfish shark, a model for chloride secretion via a cystic fibrosis transmembrane conductance regulator (CFTR)-like
Shear stress-induced platelet aggregation (SIPA) may be essential in thrombus formation in pathologically stenotic arteries. Intracellular events during SIPA are, however, poorly understood. Washed platelets were exposed to shear stress (108 dyne/cm2) in the presence of von Willebrand factor (vWf,
To validate the protein synthesis rate (PSR) measured in human brain tumors using L-[1-(11)C]tyrosine (TYR) PET, the PSR was compared to histopathological parameters that reflect proliferation and protein synthesis.
METHODS
We studied 20 patients who had a brain biopsy and who also underwent a PET
The effect of ultraviolet A (UVA) radiation on the DNA-binding activity of the transcription factor STAT1 was studied by electromobility shift assay in the human keratinocyte cell line NCTC 2544. The STAT1-binding activity exhibited a biphasic pattern as a function of UVA doses. For UVA doses lower
The aim of this study was to assess the influence of variations in the size of regions of interest (ROIs) on uptake values in brain tumours of L-3-iodine-123-alpha-methyl tyrosine (IMT). In addition, we attempted to establish the influence of size of ROIs on levels of significance assessing
Neuropathological and immunohistochemical studies were done on the brain-stem of neonates who had congenital hydrocephalus with aqueductal stenosis or Arnold-Chiari malformation (ACM). The infants with aqueductal stenosis showed heterogeneity in their clinicopathological findings while the infants
BACKGROUND
Melanocytes are producing melanin after UV irradiation as a defense mechanism. However, UV-induced damage is involved in melanoma initiation, depending on skin phototype. Melanocytes seem to be extremely susceptible to free radicals. Their main enzymatic antioxidants are superoxide
OBJECTIVE
Thrombomodulin (TM), an integral membrane glycoprotein expressed on the lumenal surface of vascular endothelial cells, promotes anti-coagulant and anti-inflammatory properties. Release of functional TM from the endothelium surface into plasma has also been reported. Much is still unknown
We report the solid phase synthesis and vasodepressor potencies of the novel hypotensive peptide [1(-beta-mercapto-beta,beta-pentamethylene propionic acid)-2-O-ethyl-D-tyrosine, 3-arginine, 4-valine] arginine vasopressin, d(CH2)5[D-Tyr(Et)2, Arg3, Val4]AVP (A), its related Lys3 (B), Tyr-NH(9)2 (C),
Cucurbitacin delta 23-reductase from Cucurbita maxima var. Green Hubbard fruit displays an apparent Mr of 32,000, a Stokes radius of 263 nm and a diffusion coefficient of 8.93 X 10(-7) cm2 X s-1. The enzyme appears to possess a homogeneous dimeric quaternary structure with a subunit Mr of 15,000.
The current study examined the chemopreventive potential of the dual-function JAK3/EGFR tyrosine kinase inhibitor WHI-P131 (CAS 202475-60-3) in photocarcinogenesis of non-melanoma skin cancer (NMSC). Prophylactic WHI-P131 exhibited significant anti-inflammatory activity in the SKH-1 mouse model of
Genistein, the most abundant isoflavone of the soy derived phytoestrogen compounds, is a potent antioxidant and inhibitor of tyrosine kinase. We previously reported the antiphotocarcinogenic effects of genistein in SKH-1 murine skin, including its capacity for scavenging reactive oxygen species,