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Nektar Presents Positive Proof-of-Concept Clinical Data for Its New Opioid Molecule, NKTR-181, at American Academy of Pain Medicine's 28th Annual Meeting
Date:2/27/2012

a wide range of doses, over multiple days of dosing, and also achieves a sustained analgesic response.  By slowing the rate of entry into the brain, NKTR-181 is designed to have less euphoria, sedation and respiratory depression than traditional opioid compounds. Individuals with a higher risk of abusing opioids prefer rapid onset of euphoria, which means NKTR-181 should be less attractive as a drug of abuse.  NKTR-181 represents an exciting developmental advance in pain.  This new human data support its further clinical development as a compelling therapeutic for the treatment of chronic pain."

Data presented at AAPM show the positive analgesic properties of NKTR-181 in humans. NKTR-181 produced dose-dependent analgesic responses in two separate models of pain used to measure central and peripheral analgesic activity in healthy subjects.  In a cold-pressor test pain model measuring latency-to-hand-removal (LHR), the 200 mg dose of NKTR-181 given twice-daily over the 8-day dosing period demonstrated the extent and duration of analgesic effect of NKTR-181 administration.  Results show a significant analgesic effect as compared to placebo (P<0.01, n=12) over the entire dosing period.  In addition, a model of induced UVB injury was also used to demonstrate the extent and duration of analgesic effect produced by NKTR-181.  Results show that NKTR-181 has both centrally-mediated and peripherally-mediated analgesic effects.  In this model, data was presented on NKTR-181 at doses of 300 mg and 400 mg demonstrating its significant analgesic and anti-hyperalgesic effect (measured as change from baseline) following mechanical and thermal stimulation, with p-values of P<0.009 and P<0.03, respectively (n=12). 

"The data from this study reinforce our belief that NKTR-181 could potentially transform the treatment of chronic pain," said Robert Medve, MD, Chief Medical Officer at Nektar Therapeutics.  "Unique
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SOURCE Nektar Therapeutics
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