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Method development workflow for quantifying protein biomarkers by hybrid LC-MS/MS.

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Summary
This summary is machine-generated.

Developing a quantitative hybrid LC-MS/MS method for endogenous protein biomarkers is crucial. This study established a validated workflow, including parallelism assessment, for reliable bioanalytical studies.

Keywords:
biomarkerendogenous proteinfit-for-purposehybrid LC–MS/MSimmunoprecipitationmethod developmentparallelism

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Area of Science:

  • Bioanalytical Chemistry
  • Biomarker Discovery
  • Mass Spectrometry

Background:

  • Lack of industry-standard guidance for hybrid LC-MS/MS assay development and validation for protein biomarkers.
  • Particular need for standardized methods to evaluate parallelism in these assays.

Purpose of the Study:

  • To develop and validate a quantitative hybrid LC-MS/MS workflow for endogenous protein biomarkers.
  • To address the lack of guidance on parallelism evaluation in bioanalytical method development.

Main Methods:

  • Utilized a human/mouse endogenous protein as a model analyte.
  • Employed a surrogate matrix approach with a recombinant protein calibrant.
  • Assessed parallelism between surrogate and authentic matrices, and between recombinant and authentic protein forms.

Main Results:

  • Successfully identified a suitable surrogate matrix.
  • Established and confirmed parallelism for both matrix and protein forms.
  • Qualified the final method using precision, accuracy, and recovery assessments.

Conclusions:

  • The developed workflow provides a robust approach for hybrid LC-MS/MS method development for endogenous protein biomarkers.
  • This validated workflow can be applied in future bioanalytical studies to ensure reliable quantification.
  • Addresses a critical gap in industry-standard guidance for protein biomarker assay validation.