Closed Forums. These North American and European events provided a unique opportunity for CRO leaders to openly share opinions and perspectives and to agree on unified bioanalytical recommendations specifically in relation with the new EMA guideline.The Global CRO Council for Bioanalysis (GCC) [101] is a global independent group of many Contract Research Organization (CRO) leaders. The GCC was formed in September 2010 to meet regularly and discuss bioanalytical issues and regulatory challenges, many of them unique to the outsourcing industry. The outcome of the discussions held as part of these GCC closed forum meetings are shared with the global bioanalytical community via pertinent publications [2][3][4][5][6] and appropriate conference presentations.Prior to the issue of this new guideline, the November 2009 Draft EMA Guideline on BMV defined the proposed guideline and criteria of the EMA on validation of bioanalytical methods and their application in the analysis of study samples from animal and human studies [7].The EMA Guideline states that the validation of the bioanalytical methods to be used on non-clinical pharmacotoxicological studies to be submitted in a marketing authorization application should be performed following the Recommendations on the interpretation of the new European Medicines Agency Guideline on Bioanalytical Method Validation by Global CRO Council for Bioanalysis (GCC) "These North American and European events provided a unique opportunity for CRO leaders to openly share opinions and perspectives and to agree on unified bioanalytical recommendations specifically in relation with the new EMA guideline.

An open letter written by the Global CRO Council for Bioanalysis (GCC) describing the GCC survey results on stability data from co-administered and co-formulated drugs was sent to multiple regulatory authorities on 14 December 2011. This letter and further discussions at different GCC meetings led to subsequent recommendations on this topic of widespread interest within the bioanalytical community over the past 2 years.

The aim of the present study was to compare the bioavailability of doxycycline (CAS 564-25-0) from two different doxycycline hyclate (CAS 24390-14-5) capsules (Monodoks 100 mg capsule as test preparation and 100 mg capsule of the originator product as reference preparation) in 24 healthy male subjects. The study was conducted according to an open-label, randomised two-period cross-over design with a wash-out phase of 16 days. Blood samples for pharmacokinetic profiling were taken up to 72 h post-dose, and doxycycline plasma concentrations were determined with a validated HPLC method with UV-detection. Maximum plasma concentrations (Cmax) of 1,715.1 ng/ml (test) and 1,613.3 ng/ml (reference) were achieved. Areas under the plasma concentration-time curve (AUC(0-infinity)) of 28,586.5 ng x h/ml (test) and 29,047.5 ng x h/ml (reference) were calculated. The median tmax was 1.88 h (test) and 2.00 h (reference). Plasma elimination half-lives (t1/2) of 16.49 h (test) and 16.75 h (reference) were determined. Both primary target parameters AUC(0-infinity) and Cmax were tested parametrically by analysis of variance (ANOVA) and the 92.39 %-103.53% (AUC(0-infinity)) and 98.45%-111.74% (Cmax). Bioequivalence between test and reference preparation was demonstrated since for both parameters AUC and Cmax the 90% confidence intervals of the T/R ratios of logarithmically transformed data were in the generally accepted range of 80 0%-125%.

The Global CRO Council for Bioanalysis (GCC) was formed in September 2010. Since then, the representatives of the member companies come together periodically to openly discuss bioanalysis and the regulatory challenges unique to the outsourcing industry. The 4th GCC Closed Forum brought together experts from bioanalytical CROs to share and discuss recent issues in regulated bioanalysis, such as the impact of coadministered drugs on stability, some differences between European Medicines Agency and US FDA bioanalytical guidance documents and lessons learned following recent Untitled Letters. Recent 483s and agency findings, as well as issues on method carryover, were also part of the topics discussed.

No abstract