Rusotinib tablet (ruxolitinib / Jakafi), birincil kemik iliği fibrozu, polisitemi vera sonrası miyelofibroz ve idiyopatik trombositoz hastasından sonra miyelofibroz dahil orta veya yüksek riskli kemik iliği fibrozunun tedavisi için. Orta veya yüksek riskli kemik iliği fibrozu olan hastalar, 65 yaşın üzerindeki veya şu durumlardan birine sahip hastaları ifade eder: anemi, fiziksel semptomlar, azalmış beyaz kan hücresi sayısı, azalmış embriyonik hücre sayısı veya azalmış trombosit sayısı. Vakaların% 80 ila% 90'ı.
Rusotinib tablets (ruxolitinib / Jakafi) are currently marketed in the United States, Europe and other places, but are still not marketed in mainland China. Rusolitinib is the first Janus associated kinase (JAK) inhibitor approved in the world so far, and the first specific myelofibrosis treatment drug approved by the FDA and the world. Rusotinib is available in 5 doses of 5, 10, 15, 20, and 25 mg / tablet, and is administered as an oral regimen twice a day. Bone marrow fibrosis is a progressive and potentially life-threatening rare blood system disease, which is a myeloproliferative tumor and is estimated to affect 1.60-18.5 million people in the United States. Bone marrow fibrosis patients are gradually replaced by scar tissue, so that blood cell production has to be carried out in organs such as liver and spleen. Anemia, leukopenia, and thrombocytopenia occur. Patients with bone marrow fibrosis are characterized by bone marrow failure and splenomegaly, as well as fatigue, musculoskeletal pain, abdominal discomfort, severe itching, night sweating, and satiety, which seriously impair the quality of life. Splenomegaly and systemic symptoms in patients with myelofibrosis are associated with JAK pathway signaling dysfunction. Rusotinib is an oral JAK1 and JAK2 inhibitor, and JAK1 and JAK2 are involved in the regulation of blood and immune function.
FDA The decision to approve the above lusotinib was mainly based on data from two phase III randomized, double-blind, and controlled clinical trials with two codenames, COMFORT-I and COMPORT-Ⅱ. The COMFORT-I study included a total of 309 patients with uncomfortable or resistant allogeneic bone marrow transplantation, or relapsed primary bone marrow fibrosis, myelofibrosis after polycythemia and idiopathic thrombocythemia, and the results showed The proportion of patients who achieved the primary end point after 24 weeks of treatment with lusotinib or placebo, even if the spleen volume decreased by ≥35%, was 41.9% and O. respectively. 7% (P <0.000 1). In addition, the proportion of patients with an improvement of ≥50% in the improved Myelofibrosis Symptom Assessment Form Total Symptom Score (MFSAF TSS) in the two groups of lusotinib or placebo was 45.9% and 5.3% (P <0.001), and the median time to response was less than 4 weeks. The C0MPORT-11 study included 219 patients with uncomfortable or allogeneic bone marrow transplantation, or relapsed primary bone marrow fibrosis, myelofibrosis after polycythemia and idiopathic thrombocytosis, and the results showed that The proportion of patients with sotinib or the best therapy hydroxyurea (hydroxyurea) or glucocorticoid after 48 weeks of treatment to reduce the spleen volume ≥35% was 28.5% and 0 (P <0.001). C0MPORT-I ve COMPORT-11'de gözlenen lusotinib tedavisinin en yaygın hematolojik yan etkileri doza bağlı trombositopeni ve anemidir, ancak bu iki yan etkinin yönetimi kolaydır ve nadiren hastaların tedaviyi bırakmasına neden olur; En yaygın kan dışı yan etkiler ishal, baş dönmesi, baş ağrısı, yorgunluk ve mide bulantısıdır.
