Novartis announced that the European Commission (EC) has approved Votubia (everolimus) tablets for the treatment of patients aged 3 years and older, with subependymal giant cell astrocytoma (SEGA) associated with tuberous sclerosis complex (TSC), who require therapeutic intervention but are not amenable to surgery. Prior to the approval of Votubia, an oral medication, brain surgery was the only treatment option for children and adults in the European Union with SEGA associated with TSC.
Tuberous sclerosis complex, also known as tuberous sclerosis (TS), affects approximately one to two million people worldwide and is associated with a variety of resulting disorders including seizures, swelling in the brain (hydrocephalus), developmental delays and skin lesions. In Europe, the prevalence in the general population is estimated to be nearly nine cases per 100,000. TSC is a genetic disorder that may cause non-cancerous tumours to form in vital organs and can affect many different parts of the body, most commonly the brain and kidney. Signs and symptoms of TSC vary depending on which system and which organs are involved. SEGAs, or non-cancerous brain tumours, occur in up to 20% of patients with TSC.
The approval from the EC follows a positive opinion from the Committee for Medicinal Products for Human Use (CHMP) in June and is based on a prospective, open-label, single-arm, phase II study of 28 patients. Results from this trial showed that 78% of patients (21 of 27) experienced a reduction of 30% or greater in the size of their largest SEGA and 33% (9 of 27) experienced a reduction of 50% or greater at six months relative to baseline. An additional placebo-controlled phase III study examining this patient population was recently presented at the International TSC Research Conference in July. This trial met its primary endpoint of SEGA response rate.
"The approval of Votubia in the European Union means that for the first time, patients living with SEGA associated with tuberous sclerosis complex will have an effective therapeutic option," said Hervé Hoppenot, President, Novartis Oncology. "This milestone serves as another example of the potential of mTOR inhibition with everolimus and we remain steadfast in our commitment to studying other manifestations of TSC."
Everolimus targets mTOR, a protein that acts as an important regulator of tumor cell division, blood vessel growth and cell metabolism. Tuberous sclerosis complex is caused by defects in the TSC1 and/or TSC2 genes. When these genes are defective, mTOR activity is increased, which can cause uncontrolled tumour cell growth and proliferation, blood vessel growth and altered cellular metabolism. By inhibiting mTOR activity in this signalling pathway, everolimus may reduce cell proliferation, blood vessel growth and glucose uptake related to SEGA associated with TSC.
"This approval is an important step forward in managing SEGAs associated with tuberous sclerosis complex, as surgery was previously the only available treatment option in the EU for these patients," said Dr. Sergiusz Jozwiak, Professor, Department of Child Neurology, The Children's Memorial Health Institute, Warsaw, Poland. "As the first approved medication for this patient community, Votubia will help fill a critical unmet treatment need."
Everolimus is approved in the European Union (EU) as Votubia (everolimus) tablets for the treatment of patients aged 3 years and older, with SEGA associated with TSC, who require therapeutic intervention but are not amenable to surgery. The evidence is based on analysis of change in SEGA volume. Further clinical benefit, such as improvement in disease-related symptoms, has not been demonstrated.
In the EU, Afinitor (everolimus) tablets is approved for the treatment of unresectable or metastatic, well- or moderately-differentiated neuroendocrine tumours (NET) of pancreatic origin in adults with progressive disease. Afinitor is also approved in the EU for the treatment of patients with advanced renal cell carcinoma whose disease has progressed on or after treatment with vascular endothelial growth factor (VEGF)-targeted therapy.
In the EU, everolimus is available in different dosage strengths for the non-oncology patient population under the trade name Certican for the prevention of organ rejection in heart and kidney transplant recipients.
Everolimus is exclusively licensed to Abbott and sublicensed to Boston Scientific for use in drug-eluting stents.
Not all indications are available in every country. Access to everolimus outside of the approved indications has been carefully controlled and monitored in clinical trials designed to better understand the potential benefits and risks of the compound. As an investigational compound the safety and efficacy profile of everolimus has not yet been established outside the approved indications. Because of the uncertainty of clinical trials, there is no guarantee that everolimus will become commercially available for additional indications anywhere else in the world.