Zfra induction of memory anticancer response via a novel immune cell.

When naive mice receive short Zfra peptides via tail vein injections, they develop lifetime resistance to growth of many cancer xenografts, due to activation of a novel spleen memory Hyal-2+ CD3- CD19- Z lymphocyte. In vitro education of spleen cells with Zfra activates Z cell for conferring memory anticancer response in vivo.