Vorasidenib was approved for medical use in the United States in August 2024.[4][5] It is the first approval by the US Food and Drug Administration (FDA) of a systemic therapy for people with grade 2 astrocytoma or oligodendroglioma with a susceptible isocitrate dehydrogenase-1 or isocitrate dehydrogenase-2 mutation.[4]
Medical uses
Vorasidenib is indicated for the treatment of people aged twelve years of age and older with grade 2 astrocytoma or oligodendroglioma with a susceptible isocitrate dehydrogenase-1 or isocitrate dehydrogenase-2 mutation, following surgery including biopsy, sub-total resection, or gross total resection.[4]
Side effects
The most common adverse reactions include fatigue, headache, increased risk of COVID-19 infection, musculoskeletal pain, diarrhea, nausea, and seizures.[4] The most common grade 3 or 4 laboratory abnormalities include increased alanine aminotransferase, increased aspartate aminotransferase, GGT increased, and decreased neutrophils.[4]
Pharmacology
Agios Pharmaceuticals previously developed the mIDH1 inhibitor ivosidenib[6] and mIDH2 inhibitor enasidenib[7][8] for treatment of acute myeloid leukemia (AML) with susceptible IDH1 or IDH2 mutations, respectively. However, ivosidenib and enasidenib have low brain exposure, precluding their use in gliomas.[9] Moreover, isoform switching between IDH1 and IDH2 has been observed as a mechanism of resistance to mIDH inhibitor therapy.[10] Vorasidenib was thus developed to improve blood-brain barrier penetration and inhibit both mIDH1/2.[9]
History
Efficacy was evaluated in 331 participants with grade 2 astrocytoma or oligodendroglioma with a susceptible isocitrate dehydrogenase-1 or isocitrate dehydrogenase-2 mutation following surgery enrolled in INDIGO (NCT04164901), a randomized, multicenter, double-blind, placebo-controlled trial.[4] Participants were randomized 1:1 to receive vorasidenib 40 mg orally once daily or placebo orally once daily until disease progression or unacceptable toxicity.[4] Isocitrate dehydrogenase-1 or isocitrate dehydrogenase-2 mutation status was prospectively determined by the Life Technologies Corporation Oncomine Dx Target Test.[4] Participants randomized to placebo were allowed to cross over to vorasidenib after documented radiographic disease progression.[4] Participants who received prior anti-cancer treatment, including chemotherapy or radiation therapy, were excluded.[4]
Clinical trial number NCT04164901 for "Study of Vorasidenib (AG-881) in Participants With Residual or Recurrent Grade 2 Glioma With an IDH1 or IDH2 Mutation (INDIGO)" at ClinicalTrials.gov
Clinical trial number NCT02481154 for "Study of Orally Administered AG-881 in Patients With Advanced Solid Tumors, Including Gliomas, With an IDH1 and/or IDH2 Mutation" at ClinicalTrials.gov
Clinical trial number NCT03343197 for "Study of AG-120 and AG-881 in Subjects With Low Grade Glioma" at ClinicalTrials.gov