Systemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy.

2.50
Hdl Handle:
http://hdl.handle.net/10541/85499
Title:
Systemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy.
Authors:
Ward, Christopher M; Read, Martin L; Seymour, Leonard W
Abstract:
Effective gene therapy for diseases of the circulation requires vectors capable of systemic delivery. The molecular weight of poly(L-lysine) (pLL) has a significant effect on the circulation of pLL/DNA complexes in mice, with pLL(211)/DNA complexes displaying up to 20 times greater levels in the blood after 30 minutes compared with pLL(20)/DNA. It is shown that pLL(20)/DNA complexes fix mouse complement C3 in vitro, independent of immunoglobulin binding; are less soluble in the blood in vivo; bind erythrocytes; are rapidly removed by the liver, where they associate predominantly with Kupffer cells; and result in a rapid increase in hepatic leukocytes expressing high levels of complement receptor 3 (CR3). The circulation properties of these complexes are also dependent on the type of DNA used, with circular plasmid DNA complexes exhibiting increased circulation compared with linear DNA. PLL(211)/DNA complexes bind erythrocytes and associate with Kupffer cells but, in contrast, do not fix mouse complement in vitro and are unaffected by the type of DNA used. In rats, both types of complexes produce hematuria and are rapidly removed from the circulation. Correlation of in vivo and in vitro results suggests that the solubility of complexes in physiological saline and species-matched complement fixation and erythrocyte lysis may correlate with systemic circulation. Analysis using human blood in vitro shows no hemolysis, but both types of complexes fix complement and bind IgG, suggesting that pLL/DNA complexes may be rapidly cleared from the human circulation.
Affiliation:
CRC Institute for Cancer Studies, University of Birmingham, United Kingdom. wardcm@hotmail.com
Citation:
Systemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy. 2001, 97 (8):2221-9 Blood
Journal:
Blood
Issue Date:
15-Apr-2001
URI:
http://hdl.handle.net/10541/85499
PubMed ID:
11290582
Type:
Article
Language:
en
ISSN:
0006-4971
Appears in Collections:
All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorWard, Christopher Men
dc.contributor.authorRead, Martin Len
dc.contributor.authorSeymour, Leonard Wen
dc.date.accessioned2009-11-06T09:47:51Z-
dc.date.available2009-11-06T09:47:51Z-
dc.date.issued2001-04-15-
dc.identifier.citationSystemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy. 2001, 97 (8):2221-9 Blooden
dc.identifier.issn0006-4971-
dc.identifier.pmid11290582-
dc.identifier.urihttp://hdl.handle.net/10541/85499-
dc.description.abstractEffective gene therapy for diseases of the circulation requires vectors capable of systemic delivery. The molecular weight of poly(L-lysine) (pLL) has a significant effect on the circulation of pLL/DNA complexes in mice, with pLL(211)/DNA complexes displaying up to 20 times greater levels in the blood after 30 minutes compared with pLL(20)/DNA. It is shown that pLL(20)/DNA complexes fix mouse complement C3 in vitro, independent of immunoglobulin binding; are less soluble in the blood in vivo; bind erythrocytes; are rapidly removed by the liver, where they associate predominantly with Kupffer cells; and result in a rapid increase in hepatic leukocytes expressing high levels of complement receptor 3 (CR3). The circulation properties of these complexes are also dependent on the type of DNA used, with circular plasmid DNA complexes exhibiting increased circulation compared with linear DNA. PLL(211)/DNA complexes bind erythrocytes and associate with Kupffer cells but, in contrast, do not fix mouse complement in vitro and are unaffected by the type of DNA used. In rats, both types of complexes produce hematuria and are rapidly removed from the circulation. Correlation of in vivo and in vitro results suggests that the solubility of complexes in physiological saline and species-matched complement fixation and erythrocyte lysis may correlate with systemic circulation. Analysis using human blood in vitro shows no hemolysis, but both types of complexes fix complement and bind IgG, suggesting that pLL/DNA complexes may be rapidly cleared from the human circulation.en
dc.language.isoenen
dc.subjectHaematuriaen
dc.subject.meshAnimals-
dc.subject.meshBlood Proteins-
dc.subject.meshComplement Activation-
dc.subject.meshComplement C3-
dc.subject.meshDNA, Circular-
dc.subject.meshDNA, Recombinant-
dc.subject.meshFemale-
dc.subject.meshGene Therapy-
dc.subject.meshGenetic Vectors-
dc.subject.meshHematuria-
dc.subject.meshHumans-
dc.subject.meshImmunomagnetic Separation-
dc.subject.meshInjections, Intravenous-
dc.subject.meshKupffer Cells-
dc.subject.meshLeukocytes-
dc.subject.meshLiver-
dc.subject.meshMice-
dc.subject.meshMice, Inbred BALB C-
dc.subject.meshMolecular Weight-
dc.subject.meshPolylysine-
dc.subject.meshRats-
dc.subject.meshRats, Wistar-
dc.subject.meshReceptors, Complement-
dc.subject.meshSolubility-
dc.subject.meshSpecies Specificity-
dc.subject.meshTissue Distribution-
dc.subject.meshTransfection-
dc.titleSystemic circulation of poly(L-lysine)/DNA vectors is influenced by polycation molecular weight and type of DNA: differential circulation in mice and rats and the implications for human gene therapy.en
dc.typeArticleen
dc.contributor.departmentCRC Institute for Cancer Studies, University of Birmingham, United Kingdom. wardcm@hotmail.comen
dc.identifier.journalBlooden
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