Abstract:
:The cyclooxygenase-2 (COX-2) gene plays a role in a wide variety of normal physiologic pathways and is a major target of pharmacologic intervention in a large number of pathophysiologic contexts, including pain, fever, inflammation, and cancer. Expression of the COX-2 gene is induced in a wide range of cells, in response to an ever-increasing number of stimuli. The regulation of the COX-2 gene has been the subject of extensive study, using traditional transfection techniques with reporter gene constructs. Regulation of the COX-2 gene in living animals, however, requires sacrifice of the animal and in situ hybridization and/or immunohistochemical studies. We have utilized in vivo optical imaging technology with a cooled charged coupled device camera to image the expression of the firefly luciferase gene in tumor xenografts that are stably transfected with a chimeric gene containing the first kilobase of the murine COX-2 promoter. Induction of luciferase gene expression following systemic lipopolysaccharide/endotoxin administration can be robustly demonstrated; both a dose-response relationship and a time course for luciferase expression from the COX-2 promoter can be noninvasively analyzed in the tumor xenografts. These data suggest expression from the COX-2 promoter will be easily analyzed in transgenic mice, in knock-in mice, and in somatic cell and gene transfer experiments.
journal_name
Mol Imaging Bioljournal_title
Molecular imaging and biologyauthors
Nguyen JT,Machado H,Herschman HRdoi
10.1016/s1536-1632(03)00105-7keywords:
subject
Has Abstractpub_date
2003-07-01 00:00:00pages
248-56issue
4eissn
1536-1632issn
1860-2002pii
S1536163203001057journal_volume
5pub_type
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