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Use of ipratropium bromide in obstructive lung disease.

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The chemistry, pharmacology, pharmacokinetics, clinical efficacy, adverse effects, and dosage of ipratropium bromide are reviewed. Ipratropium bromide, a synthetic quaternary isopropyl derivative of atropine, interrupts vagally mediated bronchoconstriction by inhibiting the cyclic guanosine

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

Sildenafil citrate and blood-pressure-lowering drugs: results of drug interaction studies with an organic nitrate and a calcium antagonist.

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Sildenafil, a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5), is a well-tolerated and highly effective treatment for erectile dysfunction. The mechanism of action of sildenafil depends on activation of the nitric oxide (NO)-cGMP pathway during

Efficacy and safety of sildenafil citrate in women with sexual dysfunction associated with female sexual arousal disorder.

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OBJECTIVE Sildenafil citrate (Viagra Pfizer, New York, NY) is indicated for the treatment of erectile dysfunction in men. The nitric oxide-cyclic guanosine monophosphate pathway (NO-cGMP) involved in penile erection and enhanced by sildenafil may also play a role in some components of the female

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

Investigation of distinct molecular pathways in migraine induction using calcitonin gene-related peptide and sildenafil.

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Migraine displays clinical heterogeneity of attack features and attack triggers. The question is whether this heterogeneity is explained by distinct intracellular signaling pathways leading to attacks with distinct clinical features. One well-known migraine-inducing pathway is mediated

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-4 inhibitor therapy for lung diseases.

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Phosphodiesterases (PDEs) are a superfamily of enzymes that catalyze the breakdown of cAMP and/or cyclic guanosine monophosphate (GMP) to their inactive form. PDE4 is the main selective cAMP-metabolizing enzyme in inflammatory and immune cells. Because PDE4 is highly expressed in leukocytes and

The headache-inducing effect of cilostazol in human volunteers.

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We have previously shown that nitric oxide (NO) and cyclic guanosine monophosphate (GMP) may cause headache and migraine. However, not all findings in previous studies can be explained by an activation of the NO-cGMP pathway. Calcitonin gene-related peptide (CGRP) causes headache and migraine in

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

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