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JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
Modification of amphipathic non-opioid dynorphin A analogues for rat brain bradykinin receptors.
Bioorganic & Medicinal Chemistry Letters 2015 January 2
It has been shown that under chronic pain or nerve injury conditions, up-regulated dynorphin A (Dyn A) interacts with bradykinin receptors (BRs) to cause hyperalgesia in the spinal cord. Thus BRs antagonist can modulate hyperalgesia by blocking Dyn A's interaction with the BRs in the central nervous system. In our earlier structure-activity relationship (SAR) study, [des-Arg(7)]-Dyn A-(4-11) 13 was discovered as a minimum pharmacophore for rat brain BRs with its antagonist activity (anti-hyperalgesic effect) in in vivo tests using naïve or injured animals. We have pursued further modification on the [des-Arg(7)]-Dyn A analogues and identified a key insight into the pharmacophore of the rat brain BRs: amphipathicity.
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