Annette Bak

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Annette Bak, Ph.D., MBA leads Advanced Drug Delivery (ADD) at Astra Zeneca. ADD has the…

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Experience & Education

  • AstraZeneca

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Publications

  • A Worldwide Web? Facts and Tips About Networking and Relationship Building

    AAPS Newsmagazine

    This article explains the underlying reasons why social interactions are so important to our well-being and happiness. It also explores how cultural and gender factors as well as our personality traits impact the likelihood of productive networking. Whether one networks internally or externally in your company, quality and mutual gain are the basis to long-term relationships, not quantity.

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  • Physicochemical Properties, Form, and Formulation Selection Strategy for a Biopharmaceutical Classification System Class II Preclinical Drug Candidate

    Journal of Pharmaceutical Sciences

    This work summarizes the pharmaceutical evaluation of a preclinical drug candidate with poor physicochemical properties. Compound 1 is a weakly basic, GPR-119 agonist designated to Biopharmaceutics Classification System Class II because of good permeability in a Caco-2 cell line model and poor solubility. Compound 1 showed good oral bioavailability from a solution formulation at low doses and oral exposure sufficient for toxicological evaluation at high doses from a nanosuspension of Form A—the…

    This work summarizes the pharmaceutical evaluation of a preclinical drug candidate with poor physicochemical properties. Compound 1 is a weakly basic, GPR-119 agonist designated to Biopharmaceutics Classification System Class II because of good permeability in a Caco-2 cell line model and poor solubility. Compound 1 showed good oral bioavailability from a solution formulation at low doses and oral exposure sufficient for toxicological evaluation at high doses from a nanosuspension of Form A—the only known polymorph of 1 during drug discovery. The identification of the thermodynamically stable polymorph, Form B, during early development adversely affected the bioperformance of the nanosuspension. The poor solubility of Form B resulted in a significant reduction in the oral exposure from a nanosuspension to a level that was insufficient for toxicological evaluation of compound 1. Subsequent to the discovery of Form B, multiple form and formulation engineering strategies were evaluated for their ability to enhance the oral exposure of 1. Formulations based on cocrystals and amorphous solid dispersions showed a statistically significant increase in exposure, sixfold and sevenfold, respectively, over the benchmark formulation, a suspension of Form B. The physicochemical characterization of 1, and the solid form and formulation engineering approaches explored to address the insufficient oral exposure of Form B are discussed along with insights on improving the physicochemical properties of the follow-on drug candidates in discovery

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