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Morpho‑functional study of the hypothalamic proline‑rich polypeptide apoptotic activity against mouse Ehrlich ascites carcinoma.
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A new type of bioactive polypeptides of the neurosecretory hypothalamus called proline‑rich peptides (PRPs), which are isolated from bovine neurosecretory granules of the neurohypophysis, are synthesized in the form of a common precursor protein (neurophysin vasopressin‑associated glycoprotein).
CCL18 from ascites promotes ovarian cancer cell migration through proline-rich tyrosine kinase 2 signaling.
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Ovarian cancer (OC) ascites consist in a proinflammatory tumor environment that is characterized by the presence of various cytokines, chemokines and growth factors. The presence of these inflammatory-related factors in ascites is associated with a more aggressive tumor phenotype. CCL18 is a member
Mouse liver free amino acids during the development of Ehrlich ascites tumour.
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Sequential amino acid concentrations were determined in the liver of mice infested with a highly malignant strain of Ehrlich ascites tumour cells. The liver concentrations of a certain group of amino acids showed changes consistent with those previously reported for plasma, ascitic liquid and tumour
Quantification, isolation and structural determination of bradykinin and hydroxyprolyl-bradykinin in tumor ascites.
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The presence of kinins in ascitic tumor fluids from rodents and human patients was identified and quantified. In bioassay, kinin content was found to be 1 to 40 ng/ml, and by enzyme immunoassay, 0.6 to 2.5 ng/ml. In particular, a high kinin content, 40 ng/ml, was found in the ascites of a gastric
Shrinkage insensitivity of NKCC1 in myosin II-depleted cytoplasts from Ehrlich ascites tumor cells.
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Protein phosphorylation/dephosphorylation and cytoskeletal reorganization regulate the Na(+)-K(+)-2Cl(-) cotransporter (NKCC1) during osmotic shrinkage; however, the mechanisms involved are unclear. We show that in cytoplasts, plasma membrane vesicles detached from Ehrlich ascites tumor cells (EATC)
Liberation of a fibrogenic factor from human blood monocytes, ascites cells, cultured histiocytes and transformed mouse macrophages by treatment with SiO2.
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Human monocytes and ascites macrophages from cirrhotic patients were isolated in Percoll-gradient and cultured with and without silica. Similar experiments were carried out also with cultured malignant human histiocytes and transformed mouse macrophages. The fibrogenic activity of the culture media
Proline-directed protein kinase FA as a new signal transducing target for lethal cancer treatment.
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Proline-directed protein kinase F(A) (PDPK F(A)) has been established as a multisubstrate/multifunctional PDPK essential for the development of highly malignant phenotypes and rapid progression of lethal cancers. The recent immunohistochemical, immunocytochemical and clinicopathologic studies
Synthesis, cytotoxic and antimicrobial screening of a proline-rich cyclopolypeptide.
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Present study describes the first total synthesis of a cyclic heptapeptide, stylisin 1 (8) via coupling of tetrapeptide Boc-L-tyrosinyl-L-prolyl-L-leucyl-L-proline-OH and tripeptide L-phenylalanyl-L-isoleucyl-L-proline-OMe followed by cyclization of linear heptapeptide segment. Structure elucidation
Purification and partial characterization of a protein from cancer ascites fluid which stimulates the resorption of bone explants in vitro.
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A protein capable of stimulating bone resorption in vitro has been purified approximately 1250-fold from cancer ascites fluid. Purification was accomplished employing successive fractionation with ammonium sulfate, ion exchange, and Cibacron blue affinity chromatography, isoelectric focusing, and
Isolation of H-SF substances, the high-molecular-weight precursors of egg envelope proteins, from the ascites accumulated in the oestrogen-treated fish, Oryzias latipes.
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High- and low-molecular weight spawning-female-specific (H-SF and L-SF) substances are liver-derived putative precursors of the inner layer of egg envelope of the medaka Oryzias latipes, and are also found in the ascites which are accumulated in the male fish on prolonged treatment with oestrogen.
Unique proteome signature of post-chemotherapy ovarian cancer ascites-derived tumor cells.
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Eighty % of ovarian cancer patients diagnosed at an advanced-stage have complete remission after initial surgery and chemotherapy. However, most patients die within <5 years due to episodes of recurrences resulting from the growth of residual chemoresistant cells. In an effort to identify mechanisms
Phosphodipeptide analysis of nonhistone nuclear proteins from Novikoff hepatoma ascites cells.
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To study the sites of phosphorylation in nuclear proteins a simple method was developed for the isolation and analysis of phosphodipeptides. Partial acid hydrolysates of unfractionated nonhistone nuclear proteins were subjected to Dowex-1 column chromatography followed by paper electrophoresis at pH
The involvement of the membrane oxidoreduction system in stimulating amino acid uptake in Ehrlich ascites tumor cells.
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The addition of 5 mM ascorbate plus 0.09 mM phenazine methosulfate stimulated 2- to 3-fold the initial rate of 2-aminoisobutyric acid transport into Ehrlich cells. This was observed under the conditions in which glycolysis and mitochondrial electron transport were blocked by iodoacetate and KCN, and
Isolation and characterization of proteoheparan sulfate from plasma membranes of an ascites hepatoma, AH 66.
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A proteoglycan was isolated from plasma membranes prepared from AH 66 cells by the following procedure. The plasma membranes were isolated from cells according to the method devised by Funakoshi and Yamashina (1976) J. Biochem. 80, 1185-1193), then the membranes were made lipid-free. The lipid-free
Antitumor agents: diazomethyl ketone and chloromethyl ketone analogues prepared from N-tosyl amino acids.
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Diazomethyl ketone and chloromethyl ketone analogues prepared from N-tosyl amino acids have been synthesized and tested for antitumor activity in Ehrlich ascites carcinoma and P-388 lymphocytic leukemia screens in mice. The N-tosyl chloromethyl ketone analogues prepared from glycine, L-alanine,
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