Delivery of recombinant gene products to the central nervous system with nonautologous cells in alginate microcapsules.

Abstract:

:Somatic gene therapy using nonautologous recombinant cells immunologically protected with alginate microcapsules has been successfully used to treat rodent genetic diseases. We now report the delivery of recombinant gene products to the brain in rodents by implanting microencapsulated cells for the purpose of eventually treating neurodegenerative diseases with this technology. Alginate-poly-L-lysine-alginate microcapsules enclosing mouse C2C12 myoblasts expressing the marker gene human growth hormone (hGH) at 95+/-20 ng/million cells/hr were implanted into the right lateral ventricles of mice under stereotaxic guidance. Control mice were implanted similarly with nontransfected but encapsulated cells. Delivery of hGH to the different regions of the brain at various times postimplantation was examined. At 7, 28, 56, and 112 days postimplantation, hGH was detected at high levels around the implantation site and also at lower levels in the surrounding regions, while control mice showed no signal. Immunohistochemical staining of the implanted brains showed that on days 7, 56, and 112 postimplantation, hGH was localized in the tissues around the implantation site. Mice implanted with encapsulated but nontransfected cells showed no signal. Hence, the feasibility of using encapsulated nonautologous cells to deliver recombinant gene products to the brain for extended periods may allow the application of this technology to the treatment of neurodegenerative genetic disorders.

journal_name

Hum Gene Ther

journal_title

Human gene therapy

authors

Ross CJ,Ralph M,Chang PL

doi

10.1089/10430349950019183

keywords:

subject

Has Abstract

pub_date

1999-01-01 00:00:00

pages

49-59

issue

1

eissn

1043-0342

issn

1557-7422

journal_volume

10

pub_type

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