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AstraZeneca announces Phase III results from naloxegol pivotal trials
A straZeneca has announced positive top-line results from two Phase III trials and one safety extension trial in patients with non-cancer related pain and opioid-induced constipation (OIC). These Phase III KODIAC trials evaluated the safety and efficacy of naloxegol, an oral peripherally-acting, mu-opioid receptor antagonist for the treatment of OIC, a common side effect of prescription opioids.

KODIAC-04 and -05 are both multicenter, randomized, double-blind, placebo-controlled pivotal trials of 12 weeks duration evaluating 12.5 mg and 25 mg naloxegol administered once-daily. The primary endpoint in both trials was percentage of OIC responders versus placebo over 12 weeks of treatment where a responder was defined as having at least three Spontaneous Bowel Movements (SBM) per week, with at least one SBM per week increase over baseline, for at least nine out of 12 weeks, and at least three out of the last four weeks. Under the design of both trials, statistical significance for the primary endpoint would be achieved if at least one of the two naloxegol doses had a p-value <0.025 compared with placebo.

Analysis of the data indicates that in KODIAC-04 both naloxegol doses (12.5 mg and 25 mg) demonstrated statistically significant results for the primary endpoint. P-values were 0.015 and 0.001 respectively.

In KODIAC-05, the 25 mg dose demonstrated a statistically significant result for the primary endpoint but the 12.5 mg dose did not. P-values were 0.202 for 12.5 mg and 0.021 for 25 mg.

The analyses also showed no clinically relevant imbalances in serious adverse events (SAEs), including externally adjudicated major cardiovascular events, across the three treatment arms in KODIAC-04, -05 and -07. The most common adverse events (AEs) in the naloxegol treatment arms in both trials were abdominal pain, diarrhea and nausea. In KODIAC-07, (the safety extension of KODIAC-04) the occurrence of AEs and SAEs was lower than in KODIAC-04 and -05. Among non-serious adverse events, arthralgia was the most common and was reported only in patients in the naloxegol 25 mg arm. All other common AEs were distributed similarly across the three treatment arms. In KODIAC-04 and -05 for either naloxegol dose, compared to placebo, there were no significant differences in change from baseline in mean daily pain scores or mean total daily opioid dose. A full assessment of the safety and tolerability findings of all three studies is ongoing.

Naloxegol is part of the exclusive worldwide license agreement announced on 21 September 2009 between AstraZeneca and Nektar Therapeutics.

“Opioid-induced constipation is a burdensome condition which is often overlooked, inadequately managed and can negatively impact a patient's quality of life,” said Martin Mackay, President of Research and Development, AstraZeneca. “The top-line results of the pivotal KODIAC studies provide important new information on the safety and efficacy of naloxegol as a potential treatment for opioid-induced constipation and we are looking forward to advancing this program.”

The core Phase III KODIAC program for naloxegol is comprised of four clinical trials which are designed to investigate the safety and efficacy of naloxegol for the treatment of OIC in patients with non-cancer related pain. The full data from these trials will be submitted for presentation at future medical meetings.

The three trials reporting top-line results include KODIAC-04, -05, and -07. KODIAC-04 and -05 are replicate pivotal 12-week efficacy and safety trials, while KODIAC-07 is a 12-week safety extension of KODIAC-04. After initial locking of the database for KODIAC-05, data associated with one patient that was previously assessed as non-retrievable was found to be retrievable. These data were added to the database and the database was again locked and underwent a final analysis. All three trials were conducted in patients with non-cancer pain and documented OIC, who require daily opioid therapy.

Enrolment is complete for the open-label, randomized, 52-week long-term safety trial (KODIAC-08) and the trial is expected to be completed by Q1 2013.

Naloxegol is a peripherally-acting mu-opioid receptor antagonist being investigated for the treatment of constipation (opioid-induced constipation or OIC) as a side effect of prescription opioid pain medicines. Naloxegol is currently considered a Schedule II controlled substance by the US Drug Enforcement Administration (DEA) based on structural relatedness to noroxymorphone. AstraZeneca has conducted the studies necessary to evaluate the abuse potential and dependence-producing properties of naloxegol in support of obtaining decontrol. A petition for the decontrol of naloxegol was submitted to the DEA in March 2012 and subsequently accepted for review. Commercialization and launch in the US will be subject to both FDA approval and DEA schedule determination.

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APBN Editorial Calendar 2016
January:
Guest Editorial - Biotechnology In Korea
February:
Guest Editorial - Biomedical Research Governance
March:
Guest Editorial - Life-Saving Opportunities: A Guide to Regenerative Medicine
April:
Leading-Edge ONCOLOGY
May:
Healthcare Systems & Policies in Asia
June:
Medical Devices & Healthcare Technology
July:
Water Technology and Management
August:
Novel Technologies for Antibody Drug Discovery in Japan
September:
Infectious Diseases
October:
Medical Tourism
November:
Big Data in Healthcare
December:
Evidence-based TCM
Editorial calendar is subjected to changes.
– Editor: Carmen, Jia Wen Loh
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