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Preclinical Alzheimer's disease (AD) studies must account for sex differences. Rigorous screening in mouse models reveals sex-specific effects on drug efficacy and safety, improving prediction of human therapeutic outcomes.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Translational Medicine

Background:

  • Increasing the predictive validity of preclinical Alzheimer's disease (AD) studies is crucial for therapeutic development.
  • Animal models must inform differential therapeutic benefits and limitations across sexes.
  • The Preclinical Testing Core (PTC) provides resources for unbiased screening of AD therapeutics, considering sex-based effects.

Purpose of the Study:

  • To establish a rigorous screening strategy for potential Alzheimer's disease (AD) therapeutics.
  • To prioritize translational outcome measures and detect sex-specific effects in mouse models.
  • To enhance the predictive validity of preclinical studies for AD drug development.

Main Methods:

  • Selecting mouse models that best recapitulate human AD pathology for compound investigation.
  • Conducting pharmacokinetic (PK) and pharmacodynamic (PD) studies in both male and female mice, powered to detect sex differences.
  • Utilizing advanced cognitive testing platforms, including touchscreen assays, for efficacy evaluation.

Main Results:

  • Identified divergent sex-specific effects on PK measures, including plasma and brain exposures.
  • Observed sex-based differences in therapeutic efficacy, such as amyloid lowering.
  • Documented sex-specific behavioral effects and side-effects across tested compounds, consistent with clinical data.

Conclusions:

  • Rigorous, unbiased screening approaches powered to detect sex effects in animal models are essential.
  • These methods can predict differential sex-based effects on therapeutic benefits and limitations for novel AD compounds.
  • Translating preclinical findings across sexes is critical for effective Alzheimer's disease treatment.