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Multiangle Light Scattering as a Lentivirus Purification Process Analytical Technology.

Sobhana A Sripada1,2, Eduardo Barbieri1,3, Shriarjun Shastry1,4,2

  • 1Department of Chemical and Biomolecular Engineering, NC State University, 911 Partners Way, Raleigh, North Carolina 27606, United States.

Analytical Chemistry
|May 28, 2024
PubMed
Summary
This summary is machine-generated.

A new method using size exclusion chromatography with multiangle light scattering (SEC-MALS) rapidly analyzes lentiviral vector (LVV) quality. This tool aids biomanufacturing by accurately measuring LVV particle counts and purity for cell and gene therapies.

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Area of Science:

  • Biotechnology
  • Analytical Chemistry
  • Gene Therapy

Background:

  • Lentiviral vectors (LVVs) are crucial for cell therapy but exhibit limited stability, necessitating robust analytical methods.
  • Monitoring LVV titer and activity during biomanufacturing is essential for ensuring product quality and therapeutic efficacy.

Purpose of the Study:

  • To develop and validate a rapid, reproducible analytical method for assessing lentiviral vector quality.
  • To determine size, purity, and particle count of LVVs using size exclusion chromatography coupled with multiangle light scattering detection (SEC-MALS).

Main Methods:

  • Utilized size exclusion chromatography coupled with multiangle light scattering detection (SEC-MALS) for LVV analysis.
  • Corroborated SEC-MALS findings with orthogonal methods including dynamic light scattering (DLS) and transmission electron microscopy (TEM).
  • Evaluated method robustness across a range of 2.78 × 10^5 to 2.67 × 10^7 particles per sample.

Main Results:

  • Developed a rapid (25 min) and reproducible (CV ∼0.5-2%) SEC-MALS method for LVV characterization.
  • MALS-based particle counts showed a strong correlation with infectious LVV titers (R^2 = 0.77) determined by transduction assays.
  • Combined SEC-MALS and DLS enabled discernment of purification effects on LVV heterogeneity and quality.

Conclusions:

  • SEC-MALS provides a reliable and efficient tool for monitoring lentiviral vector quality in biomanufacturing.
  • This analytical approach supports critical decision-making in the production of gene and cell therapies.
  • The method aids in understanding and optimizing purification processes to enhance LVV quality.