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6Oct 2016
Oct 6, 2016

IMCSzyme at SOFT 2016

SOFT – Society of Forensic Toxicology

IMCS at booth #215

Date: October  16-24
Location: Dallas, Texas

Poster Session Number 1
When: Wednesday Oct. 19 12:00 pm – 1:30 pm

IMCS Poster #03
Hydrolyzing 30,000 ng/mL of Codeine-6-β-glucuronidase in 15 minutes with Greater than 80% efficiency using IMCSzyme®

ABSTRACT:

  • • Recreational opiate and opioid use has become an increasing cause of deaths due to drug overdose.
  • • Codeine-6-glucuronide is one of the most challenging drug metabolites for β-glucuronidases to hydrolyze.
  • • >80% hydrolysis of 30,000 ng/mL codeine-6-glucuronide was achieved in 15 minutes using only 3000 units of IMCSzyme (60 µL per 30 µL urine).

 

Journal of Analytical Toxicology Article – SOFT edition

Degradation of Opioids and Opiates During Acid Hydrolysis Leads to Reduced Recovery Compared to Enzymatic Hydrolysis
Pongkwan Sitasuwan1, Cathleen Melendez1, Margarita Marinova1, Kaylee R. Mastrianni2, Alicia Darragh3, Emily Ryan3 and L. Andrew Lee1 (2016) Journal of Analytical Toxicology 40 (8): 601-607. doi: 10.1093/jat/bkw085.

ABSTRACT:

Drug monitoring laboratories utilize a hydrolysis process to liberate the opiates from their glucuronide conjugates to facilitate their detection by tandem mass spectrometry (MS). Both acid and enzyme hydrolysis have been reported as viable methods, with the former as a more effective process for recovering codeine-6-glucuronide and morphine-6-glucuronide. Here, we report concerns with acid-catalyzed hydrolysis of opioids, including a significant loss of analytes and conversions of oxycodone to oxymorphone, hydrocodone to hydromorphone and codeine to morphine. The acid-catalyzed reaction was monitored in neat water and patient urine samples by liquid chromatography–time-of-flight and tandem MS. These side reactions with acid hydrolysis may limit accurate quantitation due to loss of analytes, possibly lead to false positives, and poorly correlate with pharmacogenetic profiles, as cytochrome P450 enzyme (CYP2D6) is often involved with oxycodone to oxymorphone, hydrocodone to hydromorphone and codeine to morphine conversions. Enzymatic hydrolysis process using the purified, genetically engineered β-glucuronidase (IMCSzyme®) addresses many of these concerns and demonstrates accurate quantitation and high recoveries for oxycodone, hydrocodone, oxymorphone and hydromorphone.

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