title: In vivo delivery of glial cell-derived neurotrophic factor across the blood-brain barrier by gene transfer into brain capillary endothelial cells.
abstract: The gene encoding mouse glial cell-derived neurotrophic factor (mGDNF gene) was transfected into brain capillary endothelial cells (BCECs) with the aim of delivering the gene product extensively into the brain parenchyma by making use of the secretory function of BCECs. First, we transfected mGDNF gene into cultured BCECs (MBEC4; mouse brain capillary endothelial cells) in vitro. The amount of mGDNF protein secreted from the transfected cells into the medium was 1500 to 3200 pg/mg of cell protein per day, being about sevenfold higher than that accumulated intracellularly. Furthermore, the basolateral-directed secretion of mGDNF protein from the transfected MBEC4 cells was fivefold higher than the apical-directed secretion. Next, the hemagglutination virus of Japan (HVJ)-liposomes encapsulating mGDNF gene were administered to rats in vivo via the internal carotid artery. The transfected rats showed a marked increase in the brain level of GDNF as assessed by means of enzyme-linked immunosorbent assay (ELISA) and Western blotting on day 3 after the administration, and the level remained significantly elevated for at least 12 days. Furthermore, immunohistochemical staining revealed an increase in GDNF immunoreactivity throughout the transfected forebrain. These results indicate that the gene was successfully transferred in vivo from HVJ-liposomes into BCECs, where it was expressed, and the gene product was secreted into the brain. Then, using this delivery method, we evaluated the protective effect for dopamine neuron against a retrograde 6-hydroxydopamine (6-OHDA) lesion, as assessed by behavioral and neurochemical indices.
authors.affiliation: Department of Medico-Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
authors.forename: Chen
authors.initials: C
authors.lastname: Jiang
authors.forename: Noriko
authors.initials: N
authors.lastname: Koyabu
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Yonemitsu
authors.forename: Takao
authors.initials: T
authors.lastname: Shimazoe
authors.forename: Shigenori
authors.initials: S
authors.lastname: Watanabe
authors.forename: Mikihiko
authors.initials: M
authors.lastname: Naito
authors.forename: Takashi
authors.initials: T
authors.lastname: Tsuruo
authors.forename: Hisakazu
authors.initials: H
authors.lastname: Ohtani
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Sawada
mesh_terms: D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D001522:Behavior, Animal; D001812:Blood-Brain Barrier; D015153:Blotting, Western; D001921:Brain / Q000166:cytology / Q000378:metabolism*; D019208:Brain-Derived Neurotrophic Factor / Q000032:analysis / Q000235:genetics* / Q000276:immunology; D002196:Capillaries / Q000378:metabolism; D002343:Carotid Artery, Internal; D018929:Cell Culture Techniques; D004298:Dopamine / Q000032:analysis; D004730:Endothelium, Vascular / Q000378:metabolism*; D004797:Enzyme-Linked Immunosorbent Assay; D007150:Immunohistochemistry; D008081:Liposomes; D051379:Mice; D009457:Neuroglia; D016627:Oxidopamine / Q000494:pharmacology; D010957:Plasmids / Q000235:genetics; D029082:Sendai virus / Q000235:genetics; D014162:Transfection
chemical_list: D019208:Brain-Derived Neurotrophic Factor; D008081:Liposomes; D016627:Oxidopamine; D001058:Apomorphine; D004298:Dopamine