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Pàgina 1 des de 45 resultats
[Alteration of biogenic amines, serotonin, histamine and polyamines, in cases of diarrhea induced by various cathartics (author's transl)].
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Effects of various cathartics on charcoal transport, permeability of blood vessels and biogenic amines (serotonin (5-HT), histamine (His), polyamines) in the small intestine of mice were investigated. Diarrhea was induced in mice by oral administration of magnesium sulfate, mannitol, dioctyl sodium
[Alteration of biogenic amines, serotonin, histamine and polyamines, in cases of diarrhea induced by sugar alcohols (author's transl)].
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Therapeutic evaluation of polyamine analogue drug candidates against Enterocytozoon bieneusi in a SCID mouse model.
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Enterocytozoon bieneusi is the most common cause of chronic diarrhea in individuals with human immunodeficiency virus infection or AIDS, and there is no effective therapy. The inhibitory activities of polyamine analogues (PG-11157, PG-11158, and PG-11302) against E. bieneusi infection were evaluated
Red blood cell polyamine levels and host toxicity during continuous alpha-difluoromethylornithine infusion.
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The dose effects of continuous alpha-difluoromethylornithine (DFMO) infusion on red blood cell (RBC) polyamine levels, host toxicity and tumor growth were determined. Male rats with and without a transplantable methylcholanthrene-induced sarcoma received intravenously either 0.45% NaCl or DFMO at
Metabolically programmed polyamine analogue antidiarrheals.
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The design, synthesis, and testing of a novel class of antidiarrheal drugs based on a tetraamine pharmacophore are reported. While N1,N14-diethylhomospermine (DEHSPM) (5 mg/kg) completely prevents diarrhea in rodents, tissue distribution studies demonstrated that the principal metabolite of DEHSPM,
Polyamine analogue antidiarrheals: a structure-activity study.
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The syntheses of a group of spermine polyamine analogues and their evaluation as antidiarrheals are described. Each compound was assessed in a rodent castor oil-induced diarrhea model for its ability to reduce stool output and weight loss in a dose-dependent manner. The spermine pharmacophore is
Sequential inhibition of polyamine synthesis. A phase I trial of DFMO (alpha-difluoromethylornithine) and methyl-GAG [methylglyoxal-bis(guanylhydrazone)].
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Both DFMO and methyl-GAG inhibit sequential enzymatic reactions in the pathway of polyamine biosynthesis. Since polyamines may be important factors in proliferation of cancer cells, we initiated a phase-I study of these agents in patients with advanced cancer. DFMO was given by mouth at a constant
Control of irritable bowel syndrome with polyamine analogs: a structure-activity study.
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The evaluation of a group of polyamine analogs as agents to ameliorate diarrhea-predominant irritable bowel syndrome is described. Each compound was assessed when administered subcutaneously in a psychological stress-induced model of irritable bowel syndrome in rodents for its ability to reduce
Effect of difluoromethylornithine on host and tumor polyamine metabolism during total parenteral nutrition.
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Clinical and experimental data suggest that erythrocyte (RBC) polyamine (PA) levels are markers of tumor proliferation during total parenteral nutrition (TPN). The purpose of this experiment was to determine whether the inhibition of PA synthesis during TPN was greater in tumors than in normal host
Congenital diarrhea with intestinal inflammation and epithelial immaturity.
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We report an interesting case of congenital inflammatory bowel disease and intestinal epithelial immaturity that presented as secretory diarrhea. No infectious, metabolic, or anatomical basis for these findings was identified. As differentiated from previous reports of neonatal enteropathies, this
A Phase I Dose-Escalation Study of the Polyamine Analog PG-11047 in Patients With Advanced Solid Tumors
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Purpose: Polyamines are essential for the sustained proliferation and biomass required by tumor cells. Bis-alkylated polyamine analogs are nonfunctional competitors of natural polyamines. Of these, PG-11047, a second-generation unsaturated analog of the polyamine
Phase I and pharmacokinetic study of the polyamine synthesis inhibitor SAM486A in combination with 5-fluorouracil/leucovorin in metastatic colorectal cancer.
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OBJECTIVE
The purpose of our study was to determine the maximum-tolerated dose, dose-limiting toxicity, safety profile, and pharmacokinetics of the polyamine synthesis inhibitor SAM486A given in combination with 5-fluorouracil/leucovorin (5-FU/LV) in cancer patients.
METHODS
Patients with advanced
Clinical efficacy, tolerability, and safety of SAM486A, a novel polyamine biosynthesis inhibitor, in patients with relapsed or refractory non-Hodgkin's lymphoma: results from a phase II multicenter study.
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OBJECTIVE
SAM486A is a new inhibitor of S-adenosyl-methionine-decarboxylase, a key enzyme for polyamine biosynthesis. It is more potent than the first generation S-adenosyl-methionine-decarboxylase inhibitor methylglyoxal bis-guanylhydrazone. This Phase IIa study reports the findings of SAM486A
Calcium-sensing receptor: A new target for therapy of diarrhea.
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Management of acute diarrhea remains a global challenge, particularly in resource-limiting countries. Oral rehydration solution (ORS), a passive rehydrating therapy developed approximately 40 years ago, remains the mainstay treatment. Although ORS is effective for hydration, since it does not
Rice Bran and Probiotics Alter the Porcine Large Intestine and Serum Metabolomes for Protection against Human Rotavirus Diarrhea.
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Human rotavirus (HRV) is a leading cause of severe childhood diarrhea, and there is limited vaccine efficacy in the developing world. Neonatal gnotobiotic pigs consuming a prophylactic synbiotic combination of probiotics and rice bran (Pro+RB) did not exhibit HRV diarrhea after challenge. Multiple
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