Publications by authors named "James D Wakefield"

Background And Objectives: Impaired nitric oxide signaling through soluble guanylate cyclase has been implicated in the pathophysiology of diabetic kidney disease. Praliciguat, a soluble guanylate cyclase stimulator that amplifies nitric oxide signaling, inhibited kidney inflammation and fibrosis in animal models.

Design, Setting, Participants, & Measurements: In a phase 2 trial, 156 adults with type 2 diabetes, eGFR 30-75 ml/min per 1.

View Article and Find Full Text PDF

Nitric oxide (NO)-soluble guanylate cyclase (sGC)-cyclic 3',5' GMP (cGMP) signaling plays a central role in regulation of diverse processes including smooth muscle relaxation, inflammation, and fibrosis. sGC is activated by the short-lived physiologic mediator NO. sGC stimulators are small-molecule compounds that directly bind to sGC to enhance NO-mediated cGMP signaling.

View Article and Find Full Text PDF

The pharmacokinetics (PK), metabolism, excretion, mass balance, and tissue distribution of [ C]praliciguat were evaluated following oral administration of a 3-mg/kg dose in Sprague-Dawley rats and in a quantitative whole-body autoradiography (QWBA) study conducted in male Long-Evans rats. Plasma T was 1 hour and the t of total plasma radioactivity was 23.7 hours.

View Article and Find Full Text PDF

Aims/hypothesis: Praliciguat (IW-1973), a soluble guanylate cyclase stimulator, amplifies nitric oxide signalling. This exploratory trial investigated the safety, tolerability, pharmacokinetic profile and pharmacodynamic effects of praliciguat in individuals with type 2 diabetes and hypertension.

Methods: This Phase IIA, double-blind, placebo-controlled trial investigated praliciguat in 26 participants with type 2 diabetes and hypertension on stable glucose- and BP-lowering therapies.

View Article and Find Full Text PDF

Nitric oxide (NO)-soluble guanylate cyclase (sGC)-cyclic guanosine monophosphate (cGMP) signaling is central to the regulation of several physiological processes, including blood flow and inflammation. Deficient NO signaling is implicated in multiple diseases. sGC stimulators are small molecules that enhance sGC activity, particularly in combination with NO.

View Article and Find Full Text PDF

MM-433593 is a highly potent and selective inhibitor of fatty acid amide hydrolase-1 (FAAH-1) with potential utility as an orally administered treatment of pain, inflammation, and other disorders. In this study, we investigated the metabolism and pharmacokinetics of MM-433593 in monkeys, and compared plasma and urine metabolites of this compound to the in vitro metabolites produced by monkey hepatocytes. Intravenous administration of MM-433593 to cynomolgus monkeys produced a rapid distribution phase and slower elimination phase with a mean systemic clearance rate of 8-11 mL/min/kg.

View Article and Find Full Text PDF

Linaclotide, a potent guanylate cyclase C agonist, is a therapeutic peptide approved in the United States for the treatment of irritable bowel syndrome with constipation and chronic idiopathic constipation. We present for the first time the metabolism, degradation, and disposition of linaclotide in animals and humans. We examined the metabolic stability of linaclotide in conditions that mimic the gastrointestinal tract and characterized the metabolite MM-419447 (CCEYCCNPACTGC), which contributes to the pharmacologic effects of linaclotide.

View Article and Find Full Text PDF

Dopaminergic therapies remain the most efficacious symptomatic treatments for Parkinson's disease (PD) but are associated with motor complications, including dyskinesia, and nonmotor complications, such as psychosis, impulse control disorders (ICD), and dopamine dysregulation syndrome (DDS). Nondopaminergic neurotransmitter systems, including the endocannabinoid system, are probably critical to the development of these complications. The role of fatty acid amide hydrolase (FAAH) in mediating l-3,4-dihydroxyphenylalanine (L-DOPA)-induced behaviors was explored in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-lesioned marmoset model of PD.

View Article and Find Full Text PDF