Spectrum of BCR-ABL Mutations and Treatment Outcomes in Ethiopian Imatinib-Resistant Patients With Chronic Myeloid Leukemia

التفاصيل البيبلوغرافية
العنوان: Spectrum of BCR-ABL Mutations and Treatment Outcomes in Ethiopian Imatinib-Resistant Patients With Chronic Myeloid Leukemia
المؤلفون: Jerald P. Radich, Fisihatsion Tadesse, Amha Gebremedhin, Getahun Asres, Abdulaziz Abubeker
المصدر: JCO Global Oncology
بيانات النشر: Wolters Kluwer Health, 2021.
سنة النشر: 2021
مصطلحات موضوعية: Adult, Cancer Research, medicine.drug_class, Hematologic Malignancies, Treatment outcome, Drug resistance, medicine.disease_cause, Imatinib resistant, Tyrosine-kinase inhibitor, 03 medical and health sciences, Myelogenous, 0302 clinical medicine, hemic and lymphatic diseases, Leukemia, Myelogenous, Chronic, BCR-ABL Positive, medicine, Humans, neoplasms, Protein Kinase Inhibitors, Mutation, business.industry, Myeloid leukemia, ORIGINAL REPORTS, medicine.disease, Leukemia, Treatment Outcome, Oncology, Drug Resistance, Neoplasm, 030220 oncology & carcinogenesis, Cancer research, Imatinib Mesylate, Ethiopia, business, 030215 immunology
الوصف: PURPOSE Despite the successes achieved in chronic myeloid leukemia (CML) with tyrosine kinase inhibitor (TKI) therapy, resistance remains an obstacle. The most common mechanism of resistance is the acquisition of a point mutation in the BCR-ABL kinase domain. Few studies have reported African patients with CML in regard to such mutations. We here report the types of BCR-ABL mutations in Ethiopian imatinib-resistant patients with CML and their outcome. PATIENTS AND METHODS Patients with CML with a diagnosis of imatinib resistance who were tested for BCR-ABL mutation between 2014 and September 2019 were included. RESULTS A total of 962 cases of CML on imatinib therapy were reviewed and 164 cases of failure were found. Of these, only 31 cases (19%) had mutation analysis performed. Most cases (94%) were secondary failures. At the time of CML diagnosis, the median age was 33 years and the majority presented with features of advanced-phase disease. Of the 31 patients, 22 mutations were found (65%). The types of mutations detected were as follows: non–P-loop mutations 36% (11), P-loop mutations 13% (four), and alternatively spliced BCR-ABL variants 23% (seven). The splice variant frequently detected was BCR-ABL35INS (20%). Twenty-six of the 31 patients (84%) were switched to second-line TKIs, whereas in four patients (13%), imatinib dose escalation was done. Overall, the outcome revealed that 16 patients (52%) were alive with complete hematologic response, whereas 12 patients (39%) had died. All patients who expressed BCR-ABL135INS were treated with second-line TKIs, and two of them (33%) had died because of disease progression. CONCLUSION In Ethiopia, CML affects the young and point mutations were frequently detected in imatinib-resistant patients. BCR-ABL1 35INS was also prevalent and associated with disease progression.
اللغة: English
تدمد: 2687-8941
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b642dae7a99a6b17a56af6e1197eee3
http://europepmc.org/articles/PMC8457809
Rights: OPEN
رقم الانضمام: edsair.doi.dedup.....3b642dae7a99a6b17a56af6e1197eee3
قاعدة البيانات: OpenAIRE