Following publication of the original article [1], the authors reported an error in the spelling of one of the author names. In this Correction the incorrect and correct author names are indicated and the author name has been updated in the original publication. The authors also reported an error in the Methods section of the original article. In this Correction the incorrect and correct versions of the affected sentence are indicated. The original article has not been updated with regards to the error in the Methods section.
Ezh2(enhancer of zeste homolog 2) is a member of the Polycomb-group (PcG) family. PcG family members form multimeric protein complexes that act as suppressors of the transcriptional state of genes over successive cell generations. Ezh2 acts mainly as a gene expression suppressor as it performs this role by the addition of three methyl groups to Lysine 27 of histone 3, a modification leading to chromatin condensation. Ezh2 is overexpressed in a number of human malignancies and its overproduction causes cancer due to silencing the expression of tumor suppressor genes. Overexpression of Ezh2 in medulloblastomas (MDB) has been shown in a number of studies while inhibition of its expression results in loss of viability cancer cells. Therefore targeting Ezh2+ MDB cells has the potential to result in a significant tumor regression. We have developed the first prototype of a mutated Herpes Simplex Virus-1, which is programmed to specifically replicate in cells that overexpress Ezh2 such as MDB cells resulting in their destruction. This oncolytic virus is called as “Signal-Smart 3 or SS3” virus. Normal tissues are not affected by this virus because of low or minimal expression of Ezh2. Oncolytic viruses are a novel family of anti-cancer agents capable of targeting cancer cells in a specific manner with different mechanisms. Many older members of this family are now in advanced phases of clinical trials. In this presentation, we explain our data about the effects of SS3 virus on the viability and tumorigenesis of MDB cells in-vitro and in-vivo.
Author(s): Bota, Daniela A; Newell, Kathy L; Danley, Marsha; Davis, Marilyn; Dubinsky, Richard; Taylor, Sarah A