Publications by authors named "Orlando Bravo"

3 Publications

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Recommendations for the content and management of Certificates of Analysis for reference standards from the GCC for bioanalysis.

Bioanalysis 2021 Apr 13. Epub 2021 Apr 13.

CRMedicon, Piscataway, NJ, USA.

The 13th Global CRO Council (GCC) closed forum for bioanalysis was held in New Orleans, LA, USA on 5 April 2019. This GCC meeting was organized to discuss the contents of the 2019 ICH M10 Bioanalytical Method Validation Draft Guideline published in February 2019 and consolidate the feedback of the GCC members. While ICH M10 will cover requirements for reference standards, one of the biggest challenges facing the CRO community is the lack of consistency and completeness of Certificates of Analysis for reference standards used in regulated bioanalysis. Similar challenges exist with critical reagents (e.g., capture and detection antibodies) used for assays supporting biologics. The recommendations provided in this publication are the minimum requirements for the content that GCC members believe should be included in Certificates of Analysis for reference standards obtained from commercial vendors, sponsors and compendial suppliers, for use in regulated bioanalytical studies. In addition, recommendations for internal standards, metabolites and critical reagents are discussed.
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http://dx.doi.org/10.4155/bio-2021-0046DOI Listing
April 2021

GCC Consolidated Feedback to ICH on the 2019 ICH M10 Bioanalytical Method Validation Draft Guideline.

Bioanalysis 2019 Sep 30;11(18s):1-228. Epub 2019 Sep 30.

WuXi Apptec, Shanghai, China.

The 13 GCC Closed Forum for Bioanalysis was held in New Orleans, Louisiana, USA on April 5, 2019. This GCC meeting was organized to discuss the contents of the 2019 ICH M10 Bioanalytical Method Validation Draft Guideline published in February 2019 and consolidate the feedback of the GCC members. In attendance were 63 senior-level participants from eight countries representing 44 bioanalytical CRO companies/sites. This event represented a unique opportunity for CRO bioanalytical experts to share their opinions and concerns regarding the ICH M10 Bioanalytical Method Validation Draft Guideline and to build unified comments to be provided to the ICH.
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http://dx.doi.org/10.4155/bio-2019-0207DOI Listing
September 2019

Development and validation of an LC-MS/MS method for the determination of quetiapine and four related metabolites in human plasma.

J Pharm Biomed Anal 2010 Apr 24;51(5):1113-9. Epub 2009 Nov 24.

Clinical Pharmacology & DMPK Department, AstraZeneca Pharmaceuticals LP, 1800 Concord Pike, Wilmington, DE 19850, USA.

Pharmacokinetic measurement of the psychotropic compound quetiapine and four related metabolites in human plasma was conducted using a sensitive and specific liquid-chromatography tandem mass spectrometry (LC-MS/MS) assay that has been developed and validated for this purpose. The assay employs a single liquid-liquid extraction of quetiapine and its N-desalkyl (norquetiapine, M211,803, M1), 7-hydroxy (M214,227, M2), 7-hydroxy N-desalkyl (M236,303, M3), and sulfoxide (M213,841, M4) metabolites from human plasma, and utilizes dual-column separation, using Luna C(18) columns (50mmx2.0mm, 5microm) and positive ionization tandem MS detection in the multiple reaction monitoring (MRM) mode of the analytes and their respective stable labeled internal standards. The method provides a linear response from a quantitation range of <0.70ng/ml to at least 500ng/ml for each analyte using 40microl of plasma. The applicable range was extended by dilution up to 100-fold with blank matrix. The accuracy and precision for quetiapine were less than 6.0% and 6.4% for quetiapine, respectively. The accuracy (and precision) was less than 9.4% (5.9%) for norquetiapine; 6.4% (6.2%) for M2; and 10.0% (6.4%) for M3; and 8.6% (9.5%) for M4. This methodology enabled the determination of the pharmacokinetics of quetiapine and its metabolites in human plasma, and an example of its application is presented.
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http://dx.doi.org/10.1016/j.jpba.2009.11.018DOI Listing
April 2010