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Related Experiment Video

Updated: Feb 14, 2026

Measuring Endoreduplication by Flow Cytometry of Isolated Tuber Protoplasts
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Tuberous sclerosis complex.

Daphne M Hasbani1, Peter B Crino2

  • 1Section of Neurology, Department of Pediatrics, St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, United States.

Handbook of Clinical Neurology
|February 27, 2018
PubMed
Summary
This summary is machine-generated.

Tuberous sclerosis complex (TSC) is a genetic disorder caused by TSC1 or TSC2 mutations. mTOR inhibitors show promise in treating TSC by reducing lesion size and improving symptoms, representing a precision medicine approach.

Keywords:
SEGAautismepilepsymTORtubertuberous sclerosis

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Area of Science:

  • Genetics
  • Cell Biology
  • Pharmacology

Background:

  • Tuberous sclerosis complex (TSC) is a multisystem genetic disorder caused by mutations in TSC1 or TSC2 genes.
  • These mutations lead to loss-of-function of the TSC1/TSC2 protein complex, resulting in constitutive activation of mTOR signaling.
  • TSC affects multiple organs including the brain, skin, lungs, kidneys, and heart with variable clinical manifestations.

Purpose of the Study:

  • To investigate the role of mTOR signaling in Tuberous Sclerosis Complex.
  • To evaluate the efficacy of mTOR inhibitors as a therapeutic strategy for TSC-associated lesions and symptoms.
  • To highlight the application of precision medicine in neurodevelopmental disorders like TSC.

Main Methods:

  • Analysis of genetic variants (TSC1/TSC2 mutations) and their functional consequences.
  • Investigation of the TSC1/TSC2 protein complex's role in regulating mTOR signaling.
  • Clinical evaluation of mTOR inhibitors (rapamycin/sirolimus and everolimus) in TSC patients.

Main Results:

  • Pathogenic mutations in TSC1/TSC2 lead to constitutively active mTOR signaling in TSC lesions.
  • mTOR inhibitors (rapamycin/sirolimus, everolimus) demonstrated efficacy in reducing renal and brain lesion size in TSC.
  • These inhibitors also showed potential in improving pulmonary function and decreasing seizure frequency in TSC patients.

Conclusions:

  • Constitutive mTOR activation is a key mechanism in Tuberous Sclerosis Complex pathogenesis.
  • mTOR inhibitors represent an effective precision medicine treatment for various TSC manifestations.
  • Targeting the mTOR pathway offers a promising therapeutic avenue for neurodevelopmental disorders.