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Cara Therapeutics Announces Summary Data From Phase 1 Trial of Oral CR845 in Hemodialysis Patients with Chronic Kidney Disease

STAMFORD, Conn., July 12, 2017 (GLOBE NEWSWIRE) -- Cara Therapeutics, Inc. (CARA), a biopharmaceutical company focused on developing and commercializing new chemical entities designed to alleviate pain and pruritus by selectively targeting peripheral kappa opioid receptors, today announced summary results from its Phase 1 safety and pharmacokinetic trial of Oral CR845 in chronic kidney disease (CKD) patients undergoing hemodialysis.

The Phase 1 results showed that all four tablet strengths of Oral CR845 (0.25, 0.5, 1.0 and 2.5 mg) were generally well-tolerated when administered either daily or after dialysis three times per week. Top-line pharmacokinetic analysis indicated that plasma levels of CR845 attained after oral administration of doses up to 2.5 mg were comparable to or exceeded those attained with clinically efficacious intravenous (I.V.) doses of CR845 for the treatment of moderate-to-severe CKD-associated pruritus (CKD-aP) in hemodialysis patients. The plasma levels of CR845 attained after oral administration of the 1.0 mg tablet strength approximated those attained with the 1.0 mcg/kg I.V. CR845 dose, which demonstrated significant clinical benefit in the recently reported Phase 2/3 trial in hemodialysis patients with CKD-aP.

“We are pleased to establish that plasma levels of CR845 attained with oral tablets equaled or exceeded plasma levels previously associated with clinically efficacious I.V. CR845 doses in hemodialysis patients with moderate-to-severe CKD-associated pruritus,” said Frédérique Menzaghi, Ph.D., Vice President of Research and Development at Cara Therapeutics. “These data will inform the design of our planned Oral CR845 pruritus clinical program in the non-dialysis CKD-aP population, which we aim to initiate later this year.”

Phase 1 Trial Design and Results

The Phase 1 trial was a three-part, randomized, placebo-controlled study to evaluate the safety and pharmacokinetics of Oral CR845 tablets in 90 hemodialysis patients. In Part A, ascending repeated oral doses of 0.25, 0.5, 1.0 and 2.5 mg were given to four cohorts of patients (n=47) after each dialysis (i.e., three times) over a one-week treatment period. In Part B, ascending repeated oral doses of 0.25, 0.5 and 1.0 mg were given daily to three cohorts of hemodialysis patients (n=36). In Part C, the final crossover phase of the study, patients were...


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