title: Intraarticular expression of biologically active interleukin 1-receptor-antagonist protein by ex vivo gene transfer.
abstract: Gene therapy offers a radical different approach to the treatment of arthritis. Here we have demonstrated that two marker genes (lacZ and neo) and cDNA coding for a potentially therapeutic protein (human interleukin 1-receptor-antagonist protein; IRAP or IL-1ra) can be delivered, by ex vivo techniques, to the synovial lining of joints; intraarticular expression of IRAP inhibited intraarticular responses to interleukin 1. To achieve this, lapine synoviocytes were first transduced in culture by retroviral infection. The genetically modified synovial cells were then transplanted by intraarticular injection into the knee joints of rabbits, where they efficiently colonized the synovium. Assay of joint lavages confirmed the in vivo expression of biologically active human IRAP. With allografted cells, IRAP expression was lost by 12 days after transfer. In contrast, autografted synoviocytes continued to express IRAP for approximately 5 weeks. Knee joints expressing human IRAP were protected from the leukocytosis that otherwise follows the intraarticular injection of recombinant human interleukin 1 beta. Thus, we report the intraarticular expression and activity of a potentially therapeutic protein by gene-transfer technology; these experiments demonstrate the feasibility of treating arthritis and other joint disorders with gene therapy.
authors.affiliation: Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, PA 15261.
authors.forename: G
authors.initials: G
authors.lastname: Bandara
authors.forename: G M
authors.initials: GM
authors.lastname: Mueller
authors.forename: J
authors.initials: J
authors.lastname: Galea-Lauri
authors.forename: M H
authors.initials: MH
authors.lastname: Tindal
authors.forename: H I
authors.initials: HI
authors.lastname: Georgescu
authors.forename: M K
authors.initials: MK
authors.lastname: Suchanek
authors.forename: G L
authors.initials: GL
authors.lastname: Hung
authors.forename: J C
authors.initials: JC
authors.lastname: Glorioso
authors.forename: P D
authors.initials: PD
authors.lastname: Robbins
authors.forename: C H
authors.initials: CH
authors.lastname: Evans
mesh_terms: D000818:Animals; D001168:Arthritis / Q000628:therapy*; D003001:Cloning, Molecular; D015870:Gene Expression; D018014:Gene Transfer Techniques; D015316:Genetic Therapy; D006801:Humans; D007270:Injections, Intra-Articular; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1 / Q000037:antagonists & inhibitors*; D012333:RNA, Messenger / Q000235:genetics; D011817:Rabbits; D012795:Sialoglycoproteins / Q000235:genetics*; D013583:Synovial Membrane / Q000166:cytology; D014162:Transfection
chemical_list: C507763:IL1RN protein, human; D053590:Interleukin 1 Receptor Antagonist Protein; D007375:Interleukin-1; D012333:RNA, Messenger; D012795:Sialoglycoproteins