title: Improved liquid-liquid extraction with inter-well volume replacement dilution workflow and its application to quantify BMS-927711 in rat dried blood spots by UHPLC-MS/MS.
abstract: An UHPLC-MS/MS method was developed and validated to quantify BMS-927711, a drug candidate to treat migraine, in rat dried blood spots (DBS). The DBS samples were extracted using an improved liquid-liquid extraction (LLE) strategy involving in the sonication of DBS punches in 20% MeOH aqueous solution containing the internal standard, [(13)C2, D4]-BMS-927711, and then with a 100mM NH4OAc buffer solution, followed by an automated LLE with EtOAc-hexane (70:30, v/v). The presence of 20% MeOH as an organic modifier in the elution solution significantly improved the analyte elution efficiency and assay performance. A novel inter-well volume replacement dilution workflow was introduced for DBS sample dilution before LLE step. This was a simple two-step process, firstly a small portion of the DBS blank solution was discarded, and then the same volume of a concentrated DBS sample solution was spiked into the leftover blank solution to achieve a desired dilution. Chromatographic separation was achieved on an Acuity UPLC(®) BEH C18 column (2.1mm×50mm, 1.7μm) and the analyte was detected by selected reaction monitoring (SRM) with positive electrospray ionization on an AB Sciex Triple Quad 5500 mass spectrometer. The standard curve was linear from 5.00 to 5000ng/mL with assay precision ≤4.9% CV, and assay accuracy within ±3.1%Dev of the nominal values. Accurate sample dilution was achieved by using inter-well volume replacement with a precision of ≤4.2% CV and an accuracy of ±3.3% for dilution QC at 50,000ng/mL with 100-fold dilution (n=18). This robust UHPLC-MS/MS assay has been successfully applied to the non-clinical studies in rats. By using inter-well volume replacement workflow, accurate dilution was demonstrated using only one DBS blank sample for a typical dilution of <50-fold, and using only two blank DBS samples for a dilution of up to 625-fold. Moreover, this new workflow makes it easier to automate DBS sample dilution.
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA. Electronic address: naiyu.zheng@bms.com.
authors: Naiyu
authors: N
authors: Zheng
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA. Electronic address: jianing.zeng@bms.com.
authors: Jianing
authors: J
authors: Zeng
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Qin C
authors: QC
authors: Ji
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Aida
authors: A
authors: Angeles
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Adela
authors: A
authors: Buzescu
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Shenita
authors: S
authors: Basdeo
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Anne-Françoise
authors: AF
authors: Aubry
authors: Drug Safety Evaluation, Bristol-Myers Squibb Company, Mt. Vernon, IN 47620, USA.
authors: Kevin
authors: K
authors: Trouba
authors: Drug Safety Evaluation, Bristol-Myers Squibb Company, New Brunswick, NJ 08903, USA.
authors: Laura M
authors: LM
authors: Patrone
authors: Drug Safety Evaluation, Bristol-Myers Squibb Company, New Brunswick, NJ 08903, USA.
authors: Qianping
authors: Q
authors: Peng
authors: Analytical & Bioanalytical Development, Bristol-Myers Squibb Company, Princeton, NJ 08543, USA.
authors: Mark E
authors: ME
authors: Arnold
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D059788:Dried Blood Spot Testing / Q000379:methods*; D007201:Indicator Dilution Techniques; D057230:Limit of Detection; D059625:Liquid-Liquid Extraction / Q000379:methods; D010880:Piperidines / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*; D051381:Rats; D015203:Reproducibility of Results; D053719:Tandem Mass Spectrometry / Q000379:methods; D057188:Workflow
chemical_list: D010880:Piperidines; D011725:Pyridines; C578443:rimegepant sulfate
keywords: Dried blood spot (DBS); Liquid–liquid extraction; Quantitation; Sample dilution; UHPLC–MS/MS