title: Targeting human glioma cells using HSV-1 amplicon peptide display vector.
abstract: Targeting cell infection using herpes simplex virus type 1 (HSV-1) vectors is a complicated issue as the process involves multiple interactions of viral envelope glycoproteins and cellular host surface proteins. In this study, we have inserted a human glioma-specific peptide sequence (denoted as MG11) into a peptide display HSV-1 amplicon vector replacing the heparan sulfate-binding domain of glycoprotein C (gC). The modified MG11:gC envelope recombinant vectors were subsequently packaged into virions in the presence of helper virus deleted for gC. Our results showed that the tropism of these HSV-1 recombinant virions was increased for human glioma cells in culture as compared with wild-type virions. The binding of these recombinant virions could also be blocked effectively by pre-incubating the cells with the glioma-specific peptide, indicating that MG11 peptide and the recombinant virions competed for the same or similar receptor-binding sites on the cell surface of human glioma cells. Furthermore, preferential homing of these virions was shown in xenograft glioma mouse model following intravascular delivery. Taken together, these results validated the hypothesis that HSV-1 binding to cells can be redirected to human gliomas through the incorporation of MG11 peptide sequence to the virions.
authors.affiliation: Laboratory of Cancer Gene Therapy, Division of Cellular and Molecular Research, Humprey Oei Institute of Cancer Research, National Cancer Centre, Singapore.
authors.forename: I A W
authors.initials: IA
authors.lastname: Ho
authors.forename: L
authors.initials: L
authors.lastname: Miao
authors.forename: K C
authors.initials: KC
authors.lastname: Sia
authors.forename: G Y
authors.initials: GY
authors.lastname: Wang
authors.forename: K M
authors.initials: KM
authors.lastname: Hui
authors.forename: P Y P
authors.initials: PY
authors.lastname: Lam
mesh_terms: D000818:Animals; D005260:Female; D018390:Gene Targeting; D018014:Gene Transfer Techniques; D015316:Genetic Therapy; D005822:Genetic Vectors; D005910:Glioma / Q000235:genetics / Q000628:therapy*; D006378:Helper Viruses / Q000235:genetics; D018259:Herpesvirus 1, Human / Q000235:genetics*; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D009363:Neoplasm Proteins / Q000235:genetics; D010455:Peptides / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000235:genetics; D014407:Tumor Cells, Cultured; D014759:Viral Envelope Proteins; D014764:Viral Proteins / Q000235:genetics
chemical_list: D009363:Neoplasm Proteins; D010455:Peptides; D011993:Recombinant Fusion Proteins; D014759:Viral Envelope Proteins; D014764:Viral Proteins; C038535:glycoprotein gC, herpes simplex virus type 1