MHRA authorises GSK’s Omjjara for treating symptoms in adult myelofibrosis with anaemia
31 Jan 2024
Phase 3Drug Approval
The drug is for the treatment of disease-related splenomegaly (enlarged spleen) or symptoms in adult patients with moderate to severe anaemia who have primary myelofibrosis, post polycythaemia vera myelofibrosis or post essential thrombocythaemia myelofibrosis and who are Janus kinase (JAK) inhibitor naïve or have been treated with ruxolitinib.
Professor Claire Harrison, deputy chief medical officer in research, data, and analytics, at Guy’s and St Thomas’, said: “Myelofibrosis is a rare blood cancer with limited treatment options. The approval of Omjjara (momelotinib) is the culmination of many years of collaboration and participation by hundreds of patients in clinical trials. We are very grateful to those who took part as it has enabled this new option for treating myelofibrosis patients with moderate to severe anaemia.”
Myelofibrosis is a rare type of blood marrow cancer that disrupts the body’s normal production of blood cells. In its research, GSK found that every year, approximately 380 people are diagnosed with myelofibrosis in the UK.
It can lead to splenomegaly, constitutional symptoms such as fatigue, night sweats, and bone pain, as well as low blood counts, including anaemia (deficiency of red blood cells) and thrombocytopenia (deficiency of platelets). The company said nearly all people living myelofibrosis are estimated to develop anaemia over the course of the disease, and may require additional supportive care, including red blood cell (RBC) transfusions.
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Innovation for unmet clinical needs
Jack Harris, vice-president UK Oncology, at GSK, said: “We are committed to driving innovation for those living with unmet needs. We welcome today’s decision. As the first JAK-inhibitorJAK-inhibitor treatment licensed in Great Britain specifically indicated for adult myelofibrosis patients with moderate to severe anaemia, this milestone could have an impact on this patient population living with myelofibrosis across Great Britain. We look forward to working with all stakeholders to help allow eligible myelofibrosis patients to access this treatment on the NHS as soon as possible.”
This MA approval is supported by data from the Momentum phase 3 trial and a subpopulation of adult patients with moderate to severe anaemia (haemoglobin
The Momentum trial was designed to evaluate the safety profile and efficacy of momelotinib versus danazol for the key manifestations of myelofibrosis (such as splenomegaly, constitutional symptoms, and RBC transfusions) in an anaemic, symptomatic, JAK inhibitorJAK inhibitor-experienced population. The SIMPLIFY-1 trial was designed to evaluate the efficacy and safety profile of momelotinib versus ruxolitinib in myelofibrosis patients who had not received a prior JAK inhibitorJAK inhibitor therapy.4
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