Cited by 386RNA Interference and Gene DeliveryNanoparticle-Based Drug DeliveryAdvanced Drug Delivery Systems

The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.

Factors affecting blood clearance and in vivo distribution of polyelectrolyte complexes for gene delivery

Abstract

Self-assembling polycation/DNA complexes represent a promising synthetic vector for gene delivery. However, despite considerable versatility and transfectional activity in vitro, such materials are quickly eliminated from the bloodstream following intravenous injection (plasma alpha half-life typically less than 5 min). For targeted systemic delivery a more prolonged plasma circulation of the vector is essential. Here we have examined factors contributing to rapid elimination of poly(L-lysine) (pLL)/DNA complexes from the bloodstream, and implicate the binding of proteins to the polyelectrolyte complexes as a likely cause for their blood clearance. pLL/DNA complexes reisolated from serum associate with several proteins, depending on their net charge, although the major band on SDS-PAGE co-migrates with albumin. Serum albumin binds to pLL/DNA complexes in vitro, forming a ternary pLL/DNA/albumin complex which regains some ethidium bromide fluorescence and fails to move during agarose electrophoresis. Albumin also causes increased turbidity of complexes, and reduces their zeta potential to the same level (-16 mV) as is measured in serum. We propose that rapid plasma elimination of polycation/DNA complexes results from their binding serum albumin and other proteins, perhaps due to aggregation and phagocytic capture or accumulation of the ternary complexes in fine capillary beds.

Overview

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Crossref · 10.1038/sj.gt.3300843

Cites

24 of 24 references verified0 citation errors · 0 not checkable

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Citations

Cites

Show all 24 references

Research works printed but not linked: 4

  1. Velu T . Gene transfer and therapy in Europe: research, development and clinical trials Publication of the European Union: Brussels 1996
  2. Graham RW . Encapsulated transmembrane carrier systems for gene therapy Proceedings of the Keystone Symposium on Synthetic Non-viral Gene Delivery Systems 1998 135: (Abstr. 212)
  3. Ward CM, Seymour LW . A novel assay for determination of polycation concentration using turbidometry J Bioact Compat Polym 1998 (in press)
  4. Semple SC, Chonn A, Cullis PR . Influence of cholesterol on the association of plasma proteins with liposomes Biochemistry 1996 35: 2521–2525 · DOI

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Metadata

Authors
Dash, P. R., Read, M. L., Barrett, L. B., Wolfert, M. A., & Seymour, L. W.
Affiliations
University of Birmingham (GB)
Venue
Gene Therapy
Published
1999-04-01
Volume
6
Issue
4
Pages
643-650
ISSN
  • 0969-7128 (ISSN-L)
  • 1476-5462
OpenAlex
W2031185644
Cited by
386
References
24
Citations by year
2026: 4 · 2025: 3 · 2024: 1 · 2023: 7 · 2022: 3 · 2021: 5 · 2020: 9 · 2019: 14 · 2018: 11 · 2017: 13 · 2016: 14 · 2015: 11 · 2014: 22 · 2013: 31 · 2012: 22
FWCI
4.94
Type
journal article
Language
en
Open access
closed
Locations
  • Gene Therapy (publishedVersion)
  • PubMed (publishedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
Funders
British Heart Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advanced Drug Delivery Systems
Keywords
polyelectrolyte complexes, gene delivery, poly-L-lysine, DNA, blood clearance, serum albumin, protein binding, plasma half-life, zeta potential, complex aggregation, phagocytosis, intravenous injection, systemic drug delivery
MeSH terms
Albumins, Animals, DNA, Electrophoresis, Agar Gel, Female, Genetic Vectors, Metabolic Clearance Rate, Mice, Inbred BALB C, Polylysine, Protein Binding, Transfection, Genetic Therapy, Treatment Failure, Mice

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