Parameter Set Mycophenolic Acid - LC-MS/MS

Parameter Set Mycophenolic Acid - LC-MS/MS

   
  • Mycophenolic acid
  • Mycophenolic acid glucuronide

Order no.: 92916, 92111, 92110

For the analysis of MPA and MPAG
3PLUS1® and 6PLUS1® Multilevel Calibrator Sets available
Part of the MassTox® TDM Series A
Method for automated sample preparation also available

Product Name Qty
Parameter Set - Mycophenolic Acid - LC-MS/MS
Order no.: 92916
BASIC Kit A for 200 tests - LC-MS/MS
Order no.: 92111/200
BASIC Kit A for 1000 tests - LC-MS/MS
Order no.: 92111/1000
BASIC Kit A for 1000 tests with 96 Well Filter Plates - LC-MS/MS
Order no.: 92111/1000/F
MassTox® TDM MasterColumn® A
Order no.: 92110

Description

Clinical relevance

Mycophenolic acid (MPA) is used as an immunosuppressant agent to prevent organ transplant rejection. MPA selectively inhibits the synthesis of purines and specifically reduces the growth of B- and T-lymphocytes. Furthermore, MPA is also used to treat autoimmune diseases such as psoriasis, systemic lupus erythematosus or scleroderma.

Therapeutic monitoring of MPA in the blood is required to adjust individual concentrations within the therapeutic window and to attain a favourable ratio between therapeutic effects and side effects. Currently available drugs contain mycophenolate mofetil or mycophenolate sodium, which are both completely metabolised into the active metabolite MPA. For excretion, MPA is bound to glucuronic acid. As this step is reversible, it is advisable to analyse MPA glucuronide (MPAG) in serum/plasma, too.

 

Product advantages

With the Parameter Set Mycophenolic Acid in serum/plasma, MPA and its metabolite MPAG can be measured fast and efficiently using LC-MS/MS. Due to the careful optimisation of all kit components as well as the chromatographic separation, matrix effects (“ion suppression”) is minimised and the robustness of the method is enhanced. Sample preparation is based on a protein precipitation step. The use of deuterated internal standards allows this method to produce reproducible results despite the presence of in-source fragmenting, which is characteristic of this substance. The use of 3PLUS1® or 6PLUS1® multilevel calibrators guarantees high precision and reliable quantification. The method is comprehensively validated.

The Parameter Set is a part of the Series A modular system, which enables the analysis of more than 150 parameters without switching column or changing the mobile phases, thereby minimising required workload in the laboratory. The Basic Kit A contains all components required for sample preparation and all necessary mobile phases. The MasterColumn® A is the analytical column used for the determination of all Series A analytes. Our portfolio contains further MassTox® TDM Parameter Sets for covering more than 150 substances and metabolites.

Chromatogram

Technical Data

Method of Analysis

LC-MS/MS

Parameter

Mycophenolic acid, Mycophenolic acid glucuronide

Analysis Time

1.5 min

Limit of quantification

MPA < 0.1 mg/l, MPAG < 0.5 mg/l

Linearity

MPA up to 20 mg/l, MPAG up to 500 mg/l

Recovery

105–119 %

Intraassay

CV < 4 %

Interassay

CV < 5.5 %

Gradient

Starting point: 60 % Mobile Phase 2
0.00→0.50 min  100 % Mobile Phase 2
0.51–1.00 min    100 % Mobile Phase 2
1.01→1.10 min    60 % Mobile Phase 2
1.11–1.81 min      60 % Mobile Phase 2

Specimen

Serum/Plasma

Pre-analytic Treatment

Patient samples are stable up to 4 weeks at +2 to +8 °C. For longer storage periods (at least 3 months) keep samples frozen below -18 °C.

Sample Preparation

  • Prepare the Internal Standard Mix
  • Add 800 μl Internal Standard Mix to 12 ml Precipitation Reagent to form mixture A
  • Pipette 50 μl sample/calibrator/MassCheck® control into a 1.5 ml reaction vial
  • Add 25 μl Extraction Buffer
  • Mix and incubate 2 min at ambient temperature (do not centrifuge)
  • Add 250 μl of mixture A and mix 30 s minimum (vortex)
  • Centrifuge 5 min at 15000 x g.
  • Dilute the supernatant with Dilution Buffer prior to injection, depending on the instrument sensitivity

Sample Stability

Samples are stable up to 4 weeks at +2 to +8 °C. For longer storage periods keep samples frozen below -18 °C.

Injection Volume

0.2–50 μl

Ionisation

ESI positive

MS/MS-Mode

MRM

Additional Info

We recommend to set the scan time to a value that allows to achieve a minimum of 10 data points over the whole peak width.

Please note

The freely available information on this website, in particular on the sample preparation, are not sufficient to work with our products. Please read instructions and warning notices on products and/or instruction manuals.

Kit Components

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