12/17/2017
New LC-MS/MS bioanalytical method for quantification of Estradiol and Estrone
A new method has been successfully developed and validated for determination of Unconjugated Estradiol and Estrone in human plasma by LC-MS/MS with LLOQ of 2 pg/mL and 5 pg/mL respectively.
The method involves a liquid-liquid extraction procedure and a subsequent derivatization procedure. Estradiol, Estrone and internal standards are measured by reversed phase ultra-high performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS).
The possible metabolite back conversion has been evaluated during method validation.
This method has been successfully used to analyze samples from different clinical studies and the incurred sample reproducibility has met all acceptance crieria.
The development of this assay adds to the list of high sensitivity methods at Anapharm together with Tiotropium, Fluticasone, Salmeterol, Formoterol or Ethinyl Estradiol.
MORE NEWS
Anapharm Bioanalytics Secures Funding from Eurostars and CDTI for Innovative Project on Therapy and Diagnosis of Ewing Sarcoma
Barcelona, April 18th, 2023 – Anapharm Bioanalytics, a leading bioanalytical contract research organization (CRO), is delighted to announce the successful acquisition of funding from the Eurostars-3 joint program, with co-funding from CDTI (Centre for Industrial Technological Development) and the European Union’s Horizon Europe Research and Innovation Framework. This funding marks a significant milestone for the groundbreaking project, a collaborative effort between Anapharm Bioanalytics, iCellate Medical, and Aptadel Therapeutics.
READ MOREChallenges in the Development of a Method for the Detection of Anti-PEGylated-aptamer Antibodies
Immunogenicity assays capable of properly determining the presence of anti-drug antibodies (ADA) and anti-PEG antibodies have been recognized of great importance due to the fact that pre-existing anti-PEG antibodies could have an impact on the efficacy of a drug coupled to polyethylene glycol (PEG).
READ MOREChallenges in the determination of two analytes with different physicochemical properties, Tapinarof and its main metabolite, Tapinarof Sulfate, at the low picogram level
The challenge of developing a new bioanalytical method considerably increases when two or more metabolites need to be simultaneously analysed. Their extraction and chromatography optimization can be further complicated if their physicochemical properties vary significantly. Method development may be even more difficult when low limits of quantitation are required, for instance, when evaluating the systemic adsorption of topical drugs.
READ MORE