UMMS Affiliation

Department of Neurology; Horae Gene Therapy Center

Publication Date


Document Type



Congenital, Hereditary, and Neonatal Diseases and Abnormalities | Genetics and Genomics | Molecular Biology | Nervous System Diseases | Neurology | Therapeutics


Tuberous sclerosis complex (TSC) is a tumor suppressor syndrome caused by mutations in TSC1 or TSC2, encoding hamartin and tuberin, respectively. These proteins act as a complex that inhibits mammalian target of rapamycin (mTOR)-mediated cell growth and proliferation. Loss of either protein leads to overgrowth in many organs, including subependymal nodules, subependymal giant cell astrocytomas, and cortical tubers in the human brain. Neurological manifestations in TSC include intellectual disability, autism, hydrocephalus, and epilepsy. In a stochastic mouse model of TSC1 brain lesions, complete loss of Tsc1 is achieved in homozygous Tsc1-floxed mice in a subpopulation of neural cells in the brain by intracerebroventricular (i.c.v.) injection at birth of an adeno-associated virus (AAV) vector encoding Cre recombinase. This results in median survival of 38 days and brain pathology, including subependymal lesions and enlargement of neuronal cells. Remarkably, when these mice were injected intravenously on day 21 with an AAV9 vector encoding hamartin, most survived at least up to 429 days in apparently healthy condition with marked reduction in brain pathology. Thus, a single intravenous administration of an AAV vector encoding hamartin restored protein function in enough cells in the brain to extend lifespan in this TSC1 mouse model.


brain, gene therapy, neurology, tumor suppressor

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DOI of Published Version



Mol Ther Methods Clin Dev. 2019 Aug 16;15:18-26. doi: 10.1016/j.omtm.2019.08.003. eCollection 2019 Dec 13. Link to article on publisher's site

Journal/Book/Conference Title

Molecular therapy. Methods and clinical development

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Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.