colic/tyrosine

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Endoscopy in patients with diarrhea during treatment with vascular endothelial growth factor receptor tyrosine kinase inhibitors: Is the cause in the mucosa?

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BACKGROUND Diarrhea is a frequently occurring adverse event during treatment with vascular endothelial growth factor receptor tyrosine kinase inhibitors (VEGFR TKIs) and is mostly accompanied by abdominal cramps, flatulence and pyrosis. These complaints impair quality of life and lead to dose

Ileal absorption of tyrosine-conjugated bile acids in Wistar rats.

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We recently reported that tyrosine-conjugated bile acids, when injected intravenously into bile-fistula rats, are extracted by the liver and secreted intact into bile with an efficiency similar to that seen for taurocholate. Now the effect of tyrosine and glycyltyrosine conjugation of bile acids on

Cholic acid-based fluorescent probes for enantioselective recognition of trifunctional amino acids.

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The ditopic fluorescent photoinduced electron transfer (PET) amino acid sensory probes and were designed and synthesized from cholic acid. To confer the probes with specific binding ability, an amidothiourea moiety and a cyclic diamino-chiral receptive site were introduced on the C17 side chain and

[Gastrointestinal stromal tumours: clinical and therapeutic features. A report of 25 cases].

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OBJECTIVE To evaluate the epidemiological clinical features and herapeutic results of gastrointestinal stromal tumour (GIST). METHODS This retrospective study concerned 25 cases of gastrointestinal stromal tumour from January 1993 to December 2002. All patients have been operated and the diagnosis

Relationship between dietary proteins, their in vitro digestion products, and serum cholesterol in rats.

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A relationship was assessed between the amino acid composition of 9 protein sources or of their in vitro digestion products and total serum cholesterol in rats. Three animal proteins (casein, beef, fish) and 6 vegetable proteins (soy, pea, peanut meal, rapeseed, oatmeal, wheat gluten) were tested.

Thermodynamic origin of selective binding of β-cyclodextrin derivatives with chiral chromophoric substituents toward steroids.

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Two β-cyclodextrin derivatives with chiral chromophoric substituents, that is, L- (1) and D-tyrosine-modified β-cyclodextrin (2), were synthesized and fully characterized. Their inclusion modes, binding abilities, and molecular selectivities with four steroid guests, that is, cholic acid sodium salt

Expression of retinoic acid, triiodothyronine, and glucocorticoid hormone nuclear receptors is decreased in the liver of rats fed a hypercholesterolemia-inducing diet.

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Several studies have shown that dietary factors modulate cell signaling pathways. The aim of this study was to determine whether a hypercholesterolemia-inducing diet rich in saturated fat and cholesterol modifies rat liver expression of the nuclear receptors of retinoic acid (RAR), triiodothyronine

Studies of the effect of dietary cholesterol on hepatic protein synthesis, reduced glutathione levels and serine dehydratase activity in the rat.

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A basal diet or a basal diet plus 1% of cholesterol and 0.33% cholic acid was fed to rats for varying lengths of time and (1) the activities of liver phosphoenolpyruvate-carboxykinase (PEP-CK), tyrosine transaminase (TT), and serine dehydratase (SD); (2) the rate of total hepatic protein synthesis

Characterization and growth regulation of a rat intrahepatic bile duct epithelial cell line under hormonally defined, serum-free conditions.

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Bile duct epithelial cells, or cholangiocytes, proliferate in vivo under a number of pathologic (i.e., partial hepatectomy) and pathophysiologic (i.e., bile duct ligation, malignant transformation) conditions. However, little is known about the possible growth factors that modulate these

Endogenous ochronosis with a fatal outcome.

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BACKGROUND Endogenous ochronosis (EO) is an autosomal recessive inherited disorder where there is incomplete oxidation of tyrosine and phenylalanine due to a lack of the enzyme homogentisic acid oxidase. OBJECTIVE We report a singular observation of EO with a fatal outcome. METHODS We report the

[Potential combination of target therapy and radiation therapy in GI tract cancers].

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At cellular level, signalization pathway activated by ErbB receptors participate to the proliferation, migration and differenciation of many cellular types. Observed alterations are mutations, overexpressions with or without gene amplification or abnormal stimulation by their ligands. The most

Caerulein and morphine in a model of visceral pain. Effects on the hypotensive response to renal pelvis distension in the rat.

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In pentobarbital-anaesthetized rats (60 mg/kg, i.p.) renal pelvis distension with a pressure of 80 cm H2O caused a decline in mean arterial blood pressure. This pressure response, which disappeared rapidly after cessation of the distension, was used to study the effects of analgesic drugs known to

A novel bioluminescence-based method to investigate uptake of bile acids in living cells.

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Bile acid transporters, including the ileal apical sodium-dependent bile acid transporter (ASBT) and the hepatic sodium-taurocholate cotransporting polypeptide (NTCP), are crucial for the enterohepatic circulation of bile acids. Our objective was to develop a method for measuring bile acid

A novel missense HGD gene mutation, K57N, in a patient with alkaptonuria.

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Alkaptonuria is a rare recessive disorder of phenylalanine/tyrosine metabolism due to a defect in the enzyme homogentisate 1,2-dioxygenase (HGD) caused by mutations in the HGD gene. We report the case of a 38 year-old male with known alkaptonuria who was referred to an adult metabolic clinic after

Development of a simple model of extrinsic denervation of the small bowel in mouse.

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Small bowel transplantation (SBT) is associated with poorly understood enteric dysfunction. The study of SBT in mice is hindered by the technical difficulty of orthotopic SBT in the mouse. Our aim was to develop an easy preparation of extrinsic denervation of the entire jejunoileum in mice as a

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