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Gene expression profiles in mouse lung tissue after administration of two cationic polymers used for nonviral gene delivery.

Abstract：

PURPOSE:This study compared gene expression profiles in mouse lungs after administration of the cationic polymers polyethyleneimine (PEI) or chitosan alone or formulated with a luciferase reporter plasmid (PEI-pLuc, chitosan-pLuc). METHODS:The polymers and formulations were administered intratracheally to Balb/c mice at doses judged to be nontoxic according to intracellular dehydrogenase activity and tissue morphology. RNA was isolated from the lungs 24 or 72 h after administration, and a dedicated stress and toxicology cDNA array was used to monitor the in vivo response to the gene delivery system in the lung tissue. RESULTS:The gene expression profiles differed between the PEI and chitosan groups with regard to both the total number and the type of expressed genes. Chitosan-pLuc upregulated genes that protect the cell from oxidative stress and inflammation, such as heme oxygenase-1 and catalase, whereas PEI-pLuc upregulated genes involved in inflammatory processes, such as the cyclooxygenases 1 and 2, indicating possible involvement in the development of adverse reactions. However, both polymers activated genes involved in reaction to stress, such as DNA damage repair. Furthermore, in the PEI group, chaperone genes and members of the p38 mitogen-activated protein kinase pathway were also upregulated, suggesting a possible explanation for the better performance of PEI in gene delivery systems. CONCLUSIONS:The results indicate that gene expression profiling is a useful and sensitive tool for the evaluation of tissue responses after administration of polymers or gene delivery systems. The results also suggest a possible explanation for the differences in gene delivery performance between the two polymers in gene delivery systems.

journal_name

Pharm Res

journal_title

Pharmaceutical research

authors

Regnström K,Ragnarsson EG,Fryknäs M,Köping-Höggård M,Artursson P

doi

10.1007/s11095-006-9563-7

subject

Has Abstract

pub_date

2006-03-01 00:00:00

pages

475-82

issue

3

eissn

0724-8741

issn

1573-904X

journal_volume

23

pub_type

杂志文章

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