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Paper Information

Journal:   PHARMACEUTICAL SCIENCES   SPRING 2007 , Volume - , Number 1; Page(s) 51 To 60.
 
Paper: 

MORPHINE-6-GLUCURONIDE ASSAY USING A COMPETITIVE ELISA ASSAY

 
 
Author(s):  MASHAYEKHI S.O.*, GHANDFOROUSH SATARI M.R., HAIN R.W.D., NIXON L.S.
 
* FACULTY OF PHARMACY, HEMATOLOGY AND ONCOLOGY RESEARCH CENTER TABRIZ UNIVERSITY OF MEDICAL SCIENCES
 
Abstract: 

Objectives: Morphine 6–glucuronide (M6G), a metabolite of morphine, is considerably more potent analgesic than morphine itself. M6G in serum is particularly difficult to measure, due to low lipophilicity of the molecule and low serum concentrations after usual parenteral doses of morphine.
Methods: A competitive ELISA assay was developed to measure the concentration of M6G in serum and buffer samples. This competitive ELISA method effectively measured the degree to which samples containing an unknown amount of antigen (M6G) compete with a fixed concentration of an anti-body (R29).
Results: The method was shown to be sensitive and reproducible with low intra-assay and inter-assay variation, low matrix effect and low cross reactivity. The method was simple and easy to use, and several samples (10 to 35 samples on each plate) could be analyzed simultaneously.
Conclusion: The major advantage of the ELISA method over HPLC was the use of a very small volume (as little as 20
ml) for the assay. This advantage is important in the case of measuring M6G when it is not feasible to obtain a large volume of sample, for example in samples from newborn babies and children.

 
Keyword(s): MORPHINE-6-GLOCURONIDE, ELISA, ASSAY
 
References: 
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