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mTOR Inhibitors in Tuberous Sclerosis Complex
Paolo Curatolo1, Romina Moavero
1Pediatric Neurology Unit, Neuroscience Department, Tor Vergata University Hospital, Rome, Italy.
Abstract:
Tuberous sclerosis complex (TSC) is a genetic multiple organ system disorder that is characterized by the development of tumor-like lesions (hamartomas) and neurodevelopmental disorders. Mutations in the TSC1 and TSC2 tumor suppressor genes occur in the majority of patients with TSC, resulting in hyperactivation of the mammalian target of rapamycin (mTOR) signaling pathway and subsequent abnormalities in numerous cell processes. As a result, mTOR inhibitors such as sirolimus and everolimus have the potential to provide targeted therapy for patients with TSC. Everolimus is the first mTOR inhibitor approved as a treatment option in the USA and in Europe for patients with subependymal giant-cell astrocytomas (SEGAs) associated with TSC. The clinical evidence to date supports the use of mTOR inhibitors in a variety of TSC-associated disease manifestations, including SEGAs, renal angiomyolipoma, skin manifestations, and epilepsy. Furthermore, ongoing clinical trials evaluating mTOR inhibitors in TSC are underway, and the results of these studies are expected to provide further evidence that will firmly establish their role in this setting. This article will discuss the role of the mTOR pathway in TSC and review the pharmacokinetics, pharmacodynamics, clinical efficacy, and tolerability of mTOR inhibitors, along with their current place in clinical practice.
Insights
Tuberous sclerosis complex (TSC) is a genetic disorder caused by TSC1/TSC2 gene mutations, leading to mTOR pathway overactivation. mTOR inhibitors like everolimus show promise for treating TSC-associated tumors and other conditions.
Area of Science:
- Genetics
- Oncology
- Pharmacology
Background:
- Tuberous sclerosis complex (TSC) is a genetic disorder characterized by hamartomas and neurodevelopmental issues.
- Mutations in TSC1 and TSC2 genes lead to hyperactivation of the mammalian target of rapamycin (mTOR) pathway.
- This pathway dysregulation causes cellular abnormalities in multiple organ systems.
Purpose of the Study:
- To discuss the role of the mTOR pathway in TSC pathogenesis.
- To review the clinical evidence for mTOR inhibitors in TSC treatment.
- To examine the pharmacokinetics, pharmacodynamics, efficacy, and tolerability of these agents.
Main Methods:
- Review of existing clinical evidence and ongoing trials for mTOR inhibitors in TSC.
- Analysis of pharmacokinetic and pharmacodynamic data.
- Evaluation of clinical efficacy and safety profiles.
Main Results:
- Everolimus is approved for TSC-associated subependymal giant-cell astrocytomas (SEGAs).
- mTOR inhibitors demonstrate efficacy in treating SEGAs, renal angiomyolipomas, skin lesions, and epilepsy in TSC patients.
- Ongoing trials are expected to further solidify the role of mTOR inhibitors.
Conclusions:
- The mTOR pathway is a key therapeutic target in Tuberous Sclerosis Complex.
- mTOR inhibitors represent a targeted treatment approach for various TSC manifestations.
- Further research and clinical trials will continue to define the optimal use of these agents in TSC management.
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