Transrectal gene therapy of the prostate in the canine model.

Published

Journal Article

Direct transrectal delivery of therapeutic genes utilizing adenoviral vectors for advanced prostate cancer may offer effective treatment at the molecular level. Large animal models to assess feasibility and the intraprostatic and systemic dissemination patterns of these vectors have not been reported. For these studies, a replication-deficient (E1(-)/E3(-)) recombinant adenovirus (AdRSVlacZ) expressing bacterial beta-galactosidase (beta-gal) was delivered under transrectal ultrasound guidance. Two prostate biopsies, followed by concurrent injection of 4.8 x 10(9) pfu of the adenoviral vector divided into either 1 or 2 mL of diluent, were performed (n=4). Swabs of the rectum, sputum, and urine were collected and after 72 hours, the animals were sacrificed. Specimens were assayed for the presence of virus and beta-gal activity. Rectal swabs were transiently positive, whereas urine and sputum samples showed no detectable vector throughout the experiment. Beta-gal activity was observed at the prostate injection sites with detectable activity noted up to 7.5 mm away from the injection site. Systemic dissemination was observed regardless of the injected volume. In conclusion, transrectal prostate biopsy with concurrent prostate injection is a feasible method to deliver therapeutic adenoviral vectors for the treatment of prostate cancer; however, systemic distribution and temporary rectal shedding of virus should be anticipated.

Full Text

Duke Authors

Cited Authors

  • Weld, KJ; Mayher, BE; Allay, JA; Cockroft, JL; Reed, CP; Randolph, MM; Lu, Y; Steiner, MS; Gingrich, JR

Published Date

  • February 2002

Published In

Volume / Issue

  • 9 / 2

Start / End Page

  • 189 - 196

PubMed ID

  • 11857037

Pubmed Central ID

  • 11857037

Electronic International Standard Serial Number (EISSN)

  • 1476-5500

International Standard Serial Number (ISSN)

  • 0929-1903

Digital Object Identifier (DOI)

  • 10.1038/sj.cgt.7700425

Language

  • eng