Neural stem cells display extensive tropism for pathology in adult brain: evidence from intracranial gliomas

KS Aboody, A Brown, NG Rainov… - Proceedings of the …, 2000 - National Acad Sciences
KS Aboody, A Brown, NG Rainov, KA Bower, S Liu, W Yang, JE Small, U Herrlinger…
Proceedings of the National Academy of Sciences, 2000National Acad Sciences
One of the impediments to the treatment of brain tumors (eg, gliomas) has been the degree
to which they expand, infiltrate surrounding tissue, and migrate widely into normal brain,
usually rendering them “elusive” to effective resection, irradiation, chemotherapy, or gene
therapy. We demonstrate that neural stem cells (NSCs), when implanted into experimental
intracranial gliomas in vivo in adult rodents, distribute themselves quickly and extensively
throughout the tumor bed and migrate uniquely in juxtaposition to widely expanding and …
One of the impediments to the treatment of brain tumors (e.g., gliomas) has been the degree to which they expand, infiltrate surrounding tissue, and migrate widely into normal brain, usually rendering them “elusive” to effective resection, irradiation, chemotherapy, or gene therapy. We demonstrate that neural stem cells (NSCs), when implanted into experimental intracranial gliomas in vivo in adult rodents, distribute themselves quickly and extensively throughout the tumor bed and migrate uniquely in juxtaposition to widely expanding and aggressively advancing tumor cells, while continuing to stably express a foreign gene. The NSCs “surround” the invading tumor border while “chasing down” infiltrating tumor cells. When implanted intracranially at distant sites from the tumor (e.g., into normal tissue, into the contralateral hemisphere, or into the cerebral ventricles), the donor cells migrate through normal tissue targeting the tumor cells (including human glioblastomas). When implanted outside the CNS intravascularly, NSCs will target an intracranial tumor. NSCs can deliver a therapeutically relevant molecule—cytosine deaminase—such that quantifiable reduction in tumor burden results. These data suggest the adjunctive use of inherently migratory NSCs as a delivery vehicle for targeting therapeutic genes and vectors to refractory, migratory, invasive brain tumors. More broadly, they suggest that NSC migration can be extensive, even in the adult brain and along nonstereotypical routes, if pathology (as modeled here by tumor) is present.
National Acad Sciences