Cited by 152Mass Spectrometry Techniques and ApplicationsVirus-based gene therapy researchAdvanced Proteomics Techniques and Applications

Resolving Adeno-Associated Viral Particle Diversity With Charge Detection Mass Spectrometry

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Pierson, Elizabeth E., Keifer, David. Z., Asokan, Aravind, Jarrold, Martin F.·2016·Analytical Chemistry

Abstract

Recombinant adeno-associated viruses (AAVs) are promising vectors for human gene therapy. However, current methods for evaluating AAV particle populations and vector purity are inefficient and low resolution. Here, we show that charge detection mass spectrometry (CDMS) can resolve capsids that contain the entire vector genome from those that contain partial genomes and from empty capsids. Measurements were performed for both single-stranded and self-complementary genomes. The self-complementary AAV vector preparation appears to contain particles with partially truncated genomes averaging at half the genome length. Comparison to results from electron microscopy with manual particle counting shows that CDMS has no significant mass discrimination in the relevant mass range (after a correction for the ion velocity is taken into account). Empty AAV capsids are intrinsically heterogeneous, and capsids from different sources have slightly different masses. However, the average masses of both the empty and full capsids are in close agreement with expected values. Mass differences between the empty and full capsids for both single-stranded and self-complementary AAV vectors indicate that the genomes are largely packaged without counterions.

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Authors
Pierson, E. E., Keifer, D. Z., Asokan, A., & Jarrold, M. F.
Affiliations
  • Indiana University Bloomington (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
  • Asokan, Aravind
  • Jarrold, Martin F.
Venue
Analytical Chemistry
Published
2016-06-16
Volume
88
Issue
13
Pages
6718-6725
ISSN
  • 0003-2700 (ISSN-L)
  • 1520-6882
OpenAlex
W2439361170
Cited by
152
References
59
Citations by year
2026: 9 · 2025: 11 · 2024: 20 · 2023: 24 · 2022: 20 · 2021: 23 · 2020: 12 · 2019: 13 · 2018: 7 · 2017: 12 · 2016: 1
FWCI
5.47
Type
journal article
Language
en
Open access
Locations
  • Analytical Chemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Science Foundation (CHE-1531823)
  • U.S. Department of Health and Human Services (P01HL112761, R01HL089221)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
Keywords
adeno-associated virus, charge detection mass spectrometry, empty capsids, self-complementary AAV, genome packaging, gene therapy vectors
MeSH terms
Dependovirus, Capsid, DNA, Viral, Genetic Vectors, Microscopy, Electron, Mass Spectrometry, Capsid Proteins

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