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Area of Science:

  • Pharmacology
  • Medicinal Chemistry
  • Forensic Science

Background:

  • Kratom (Mitragyna speciosa) is used for stimulant and analgesic effects.
  • 7-Hydroxymitragynine (7-HMG), a potent opioid agonist, is semi-synthesized and popular for pain relief.
  • Synthetic derivatives like MGM-15 show increased opioid receptor affinity.

Purpose of the Study:

  • Analyze MGM-15 content in commercially available tablets.
  • Evaluate MGM-15's binding affinities at opioid receptors.
  • Compare MGM-15's affinity to 7-HMG.

Main Methods:

  • UPLC-MS/MS analysis of MGM-labeled tablets.
  • Purification of MGM-15.
  • In vitro opioid receptor binding assays.

Main Results:

  • Tablets contained an average of 10.9 mg of MGM-15.
  • No naturally occurring kratom alkaloids or illicit substances were detected.
  • MGM-15 demonstrated greater binding affinities for human mu (hMOR) and delta (hDOR) opioid receptors than 7-HMG.

Conclusions:

  • MGM-15 possesses higher opioid receptor affinity than 7-HMG.
  • This suggests a potential for greater opioid effects and associated risks.
  • Urgent research is needed to inform regulation and prevent misuse.