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Página 1 a partir de 17 resultados
Guanosine triphosphate cyclohydrolase I deficiency: a rare cause of hyperphenylalaninemia.
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Tetrahydrobiopterin (BH4) deficiencies are a heterogeneous group of disorders caused by a defect in two of the three enzymes involved in its biosynthesis or in the two recycling enzymes. Except for the deficiency of dehydratase, an enzyme catalyzing a reaction in the recycling pathway, all other
A phase II trial of carboplatin and gemcitabine with exisulind (IND #65,056) in patients with advanced non-small cell lung cancer: an Eastern Cooperative Oncology Group study (E1501).
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BACKGROUND
Carboplatin and gemcitabine are one standard regimen for patients with advanced non-small cell lung cancer (NSCLC). The oral proapoptotic agent exisulind is a cyclic guanosine monophosphate phosphodiesterase that increases apoptosis in vitro. We performed a phase II trial of carboplatin
[Determination of nucleosides in Rhizoma Pinelliae by high performance liquid chromatography].
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A high performance liquid chromatographic (HPLC) method was established to determine nucleosides in Rhizoma Pinelliae, which is a dried stem tuber of Pinellia pedatisecta Schott in Pinellia plant belonging to Araceae family and has multiple efficiencies about down-bear counterflow and check
Natriuretic peptide-dependent cGMP signal pathway potentiated the relaxation of gastric smooth muscle in streptozotocin-induced diabetic rats.
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A common gastrointestinal complication of diabetes is gastroparesis, and patients with gastroparesis may present with early satiety, nausea, vomiting, bloating, postprandial fullness, or upper abdominal pain. However, the pathogenesis is not clear yet. A recent study indicated that atrial
Efficacy of mycophenolic acid for the treatment of psoriasis.
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The efficacy of orally administered mycophenolic acid (MPA), an inhibitor of guanosine monophosphate (GMP) synthesis, for the treatment of psoriasis, was studied in a double-blind fashion. Of twenty-one patients completing the study period, ten of eleven patients treated with MPA had a greater than
Acute myocardial infarction after sildenafil citrate ingestion.
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OBJECTIVE
To report a case of acute myocardial infarction (MI) associated with the use of oral sildenafil in a nitrate-free patient.
METHODS
A 45-year-old man was admitted to the hospital with acute left-sided chest pain, nausea, and vomiting that started approximately 30 minutes after taking
Recent advances in PDE4 inhibitors as immunoregulators and anti-inflammatory drugs.
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The phosphodiesterases (PDEs) are responsible for the hydrolysis of intracellular cyclic adenosine and guanosine monophosphate (cAMP and cGMP, respectively). They are classified into 11 major families (PDE1-11) and the type 4 phosphodiesterase (PDE4) is a cAMP-specific enzyme localized in airway
Inhibitory effects of hesperetin derivatives on guinea pig phosphodiesterases and their ratios between high- and low-affinity rolipram binding.
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The phosphodiesterase (PDE)4 molecule exists as two distinct conformers, PDE4H and PDE4L , which have high and low affinities, respectively, for the selective PDE4 inhibitor, rolipram. The inhibition of PDE4H and PDE4L is associated with adverse responses, such as nausea, vomiting, and gastric
The potential of PDE4 inhibitors in asthma or COPD.
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At least 11 families of distinct phosphodiesterase (PDE) isoenzymes are known to regulate the function of many cells secondary to altering the intracellular levels of second messengers including cyclic 3'5-monophosphate (cyclic AMP) and cyclic 3'5 guanosine monophosphate (cyclic GMP). While there is
The therapeutic potential of PDE4 inhibitors.
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Phosphodiesterase enzymes are responsible for the inactivation of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). Phosphodiesterase 4 (PDE4) is a cAMP specific phosphodiesterase expressed in inflammatory cells such as eosinophils. Inhibition of PDE4 results in an
Phosphodiesterase type 4 inhibitors: potential in the treatment of multiple sclerosis?
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Phosphodiesterases (PDEs) are involved in the regulation of intracellular levels of the second messengers cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). These enzymes hydrolyse the cyclic nucleotides to the corresponding nucleoside 5'-monophosphates. Nine PDE
Phosphodiesterase inhibitors in airways disease.
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Phosphodiesterases hydrolyse intracellular cyclic nucleotides, cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) into inactive 5' monophosphates, and exist as 11 families. They are found in a variety of inflammatory and structural cells. Inhibitors of PDEs allow the
Headache-type adverse effects of NO donors: vasodilation and beyond.
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Although nitrate therapy, used in the treatment of cardiovascular disorders, is frequently associated with side-effects, mainly headaches, the summaries of product characteristics of nitrate-containing medicines do not report detailed description of headaches and even do not highlight the
Update on the therapeutic potential of PDE4 inhibitors.
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Phosphodiesterase (PDE) enzymes are responsible for the inactiviation of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). Phosphodiesterase 4 (PDE4) is a cAMP specific phosphodiesterase expressed in inflammatory cells such as eosinophils. Inhibition of PDE4 results in
Excitation of area postrema neurons by transmitters, peptides, and cyclic nucleotides.
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1. Multiple-barreled microelectrodes were used to record from neurons in the area postrema of anesthetized dogs and to test the responses of the neurons to a variety of substances in this structure, which is known to function as the chemoceptive trigger zone for emesis. 2. The neurons in area
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