A Review of Real-World Experience With Ruxolitinib for Myelofibrosis.

Myelofibrosis (MF) is a rare myeloproliferative neoplasm characterized by progressive bone marrow fibrosis and splenomegaly. Ruxolitinib is the standard-of-care first-line treatment option for MF. This review summarizes real-world effectiveness and safety of ruxolitinib in more than 4500 patients with MF from real-world settings, including expanded-access and phase 4 trials, as well as registry, postmarketing, and retrospective studies in the 10 years since regulatory approval.

How I Treat Anemia in Myelofibrosis.

Anemia is a common consequence of myelofibrosis. The treatment of myelofibrosis-associated anemia is complicated by a multifactorial pathobiology, as well as a lack of therapies that result in normalization of the bone marrow and complete restoration of its function. Established agents that are used to treat anemia in other bone marrow failure states such as myelodysplastic syndromes and aplastic anemia, are used for the treatment of myelofibrosis-associated anemia.

JAK2 p.R564 germ line variants associated with hereditary thrombocythemia and hematologic neoplasms.

The Janus kinase 2 (JAK2) V617F mutation activates the transcription pathway and has been well-characterized as a driver of myeloproliferative neoplasms (MPNs). Recently, there has been a heightened interest in understanding germline predisposition to hematological malignancies including MPN, including several reports of familial MPN. Here, we retrospectively analyzed medical records and data from genetic testing to describe twelve patients with germline variants at amino acid position 564 of JAK2.

Longitudinal Assessment of Transfusion Intensity in Patients With JAK Inhibitor-Naive or -Experienced Myelofibrosis Treated With Momelotinib.

Purpose: Anemia is a cardinal feature of myelofibrosis often managed with red blood cell (RBC) transfusions, which may contribute to negative prognostic, quality-of-life, and healthcare-related economic impacts. The Janus kinase (JAK) 1/JAK2/activin A receptor type 1 inhibitor momelotinib was approved for the treatment of patients with myelofibrosis and anemia based on clinical trial evidence of anemia, spleen, and symptom benefits illustrated using binomial response/nonresponse endpoints. In the present post hoc, descriptive analyses, the impact of momelotinib on RBC transfusion burden over time was further characterized across JAK inhibitor-naive and -experienced patients.

Pacritinib Response Is Associated With Overall Survival in Myelofibrosis: PERSIST-2 Landmark Analysis of Survival.

Spleen volume reduction (SVR) is a key endpoint in inhibitors of Janus kinase (JAK) inhibitor studies. Retrospective analyses have demonstrated an association between SVR and improved overall survival (OS) among patients treated with ruxolitinib with a platelet count > 100 × 10/L. Whether this association occurs in patients with thrombocytopenia is unclear.