Early Response and Long-Term Outcomes of Ruxolitinib Therapy in Myelofibrosis: Multicenter Retrospective Study in 10 Centers of the Russian Federation

EG Lomaia1, NT Siordiya1, OM Senderova2, OE Ochirova3, EB Zhalsanova3, AYu Furtovskaya1, GP Dimov4, MG Pozina4, OYu Li5, KB Trizna6, MA Mikhalev7, EV Sokurova8, AA Otmorskaya9, AS Khazieva10, VV Ust’yantseva11, YuD Rogovaya1, AYu Zaritskey1

1 VA Almazov National Medical Research Center, 2 Akkuratova str., Saint Petersburg, Russian Federation, 197341

2 Irkutsk Regional Clinical Hospital, 100 Yubileinyi microdistrict, Irkutsk, Russian Federation, 664049

3 NA Semashko Republican Clinical Hospital, 12 Pavlova str., Ulan-Ude, Russian Federation, 670031

4 Municipal Clinical Hospital No. 1, 16 Vorovskogo str., Chelyabinsk, Russian Federation, 454048

5 Sakhalin Regional Clinical Hospital, 430 Mira pr-t, Yuzhno-Sakhalinsk, Russian Federation, 693004

6 Tomsk Regional Clinical Hospital, 96 Ivana Chernykh str., Tomsk, Russian Federation, 634063

7 Krasnoyarsk Interdistrict Clinical Hospital No. 7, 4 Akademika Pavlova str., Krasnoyarsk, Russian Federation, 660003

8 Vladivostok Polyclinic No. 4, 5 Voropaeva str., Vladivostok, Russian Federation, 690000

9 Regional Clinical Hospital, 1 Lyapidevskogo str., Barnaul, Russian Federation, 656024

10 Krasnoyarsk Regional Clinical Hospital, 3A Partizana Zheleznyaka str., Krasnoyarsk, Russian Federation, 660022

11 Railway Clinical Hospital, the Chelyabinsk Railway Station, 41 Tsvillinga str., Chelyabinsk, Russian Federation, 454000

For correspondence: Nadiya Tamazovna Siordiya, 2 Akkuratova str., Saint Petersburg, Russian Federation, 197341; e-mail: siordian@list.ru

For citation: Lomaia EG, Siordiya NT, Senderova OM, et al. Early Response and Long-Term Outcomes of Ruxolitinib Therapy in Myelofibrosis: Multicenter Retrospective Study in 10 Centers of the Russian Federation. Clinical oncohematology. 2020;13(3):335–45 (In Russ).

DOI: 10.21320/2500-2139-2020-13-3-335-345


ABSTRACT

Aim. To assess the efficacy of targeted therapy with ruxolitinib in patients with myelofibrosis in real clinical practice in Russia. To determine the prognostic value of spleen reduction in the early stages of ruxolitinib treatment and its effect on overall survival.

Materials & Methods. The present retrospective study was based on the data of 10 centers of Russia. It included 56 myelofibrosis (primary or post-polycythemic and post-thrombocythemic) patients who received ruxolitinib. The median age of patients was 56 years (range 26–76 years). Most of them (59 %) were considered intermediate-1 risk according to DIPSS and had massive splenomegaly (80 %), and constitutional symptoms (86 %). The initial drug dose was 30 mg per day in 64 % of cases, and the level of thrombocytes was ≥ 200 × 109/L in 61 % of patients. The spleen size was evaluated by palpation.

Results. By the start of data collection most of patients (79 %) had been treated with ruxolitinib. In no case therapy was withdrawn for the reason of drug toxicity. On ruxolitinib constitutional symptoms were reversed in 70 %, 87 %, and 98 % of patients by months 1, 3 and 6, respectively. In 36 % and 46 % of patients by months 3 and 6, respectively, ≥ 50 % decrease in spleen size was observed. Overall, in 31 % and 27 % of cases the size of the spleen decreased by less than 25 % by months 3 and 6, respectively. The factors affecting the changes in spleen size have not been identified. The probability of overall survival by years 2 and 5 of follow-up was 97 % and almost 70 %, respectively. This parameter was significantly affected by the extent of spleen size reduction by month 3 of follow-up as well as by its initial size.

Conclusion. Ruxolitinib shows high efficacy for both decrease of general myelofibrosis symptoms and reduction in spleen size. The extent of spleen reduction is an important prognostic factor. In patients with insufficient spleen reduction an increase in drug dose is advisable. If it is not possible, alternative methods of treatment should be sought.

Keywords: myelofibrosis, ruxolitinib, spleen size changes, constitutional symptoms, overall survival.

Received: January 31, 2020

Accepted: May 15, 2020

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  18. Al-Ali HK, Griesshammer M, le Coutre P, et al. Safety and efficacy of ruxolitinib in an open-label, multicenter, single-arm phase 3b expanded-access study in patients with myelofibrosis: a snapshot of 1144 patients in the JUMP trial. 2016;101(9):1065–73. doi: 10.3324/haematol.2016.143677.

Targeted Therapy of Myelofibrosis

OYu Vinogradova1,3,4, VA Shuvaev2, IS Martynkevich2, MM Pankrashkina1,3, MS Fominykh2, EV Efremova2, KYu Krutikova2, LB Polushkina2, NN Sharkunov1, SV Voloshin2, AV Chechetkin2

1SP Botkin Municipal Clinical Hospital, 5 2-i Botkinskii pr-d, Moscow, Russian Federation, 125284

2Russian Research Institute of Hematology and Transfusiology, 16 2-ya Sovetskaya str., Saint Petersburg, Russian Federation, 191024

3Dmitrii Rogachev National Medical Pediatric Hematology, Oncology and Immunology Research Center, 1 Samory Mashela str., Moscow, Russian Federation, 117198

4NI Pirogov Russian National Research Medical University, 1 Ostrovityanova str., Moscow, Russian Federation, 117997

For correspondence: Ol’ga Yur’evna Vinogradova, MD, PhD, 5 2-i Botkinskii pr-d, Moscow, Russian Federation, 125284; Tel.: 8(495)945-97-61; e-mail: olgavinz@mail.ru.

For citation: Vinogradova OYu, Shuvaev VA, Martynkevich IS, et al. Targeted Therapy of Myelofibrosis. Clinical oncohematology. 2017;10(4):471–8 (In Russ).

DOI: 10.21320/2500-2139-2017-10-4-471-478


ABSTRACT

Background. Myelofibrosis (primary myelofibrosis, post-essential trombocythemia myelofibrosis, post-polycythemia myelofibrosis) is the most complex and pressing problem among all Ph-negative myeloproliferative diseases. The present article summarizes the author’s experience of using new Janus kinase inhibitors in routine clinical practice, and compares the data with the results of other clinical research.

Aim. To evaluate the use of ruxolitinib in patients with myelofibrosis.

Materials & Methods. Our analysis includes 48 patients (21 men and 27 women) with histologically verified myelofibrosis (primary myelofibrosis in 36 cases, post-essential trombocythemia myelofibrosis in 10 cases, and post-polycythemia myelofibrosis in 2 cases) in a chronic stage. All patients received ruxolitinib. Median age at the start of therapy was 60 years (range from 35 to 79). Massive splenomegaly (≥ 10 cm below the costal margin) was found in 34 (71 %) of 48 patients. The initial dose of ruxolitinib was determined by the platelet level. The efficacy of the therapy was evaluated in accordance with ELN 2013 criteria.

Results. Median duration of treatment was 18 months (range from 1 to 50 months). Symptoms of intoxication were relieved in 33 of 37 patients (89 %). The spleen size decreased in 64 % of patients. In 33 % of cases spleen size did not change, whereas an increase was observed in 3 % of patients. In the majority of patients hemoglobin level remained stable through the course of treatment. Three of 14 transfusion dependent patients did not require blood transfusions after 3 months of therapy. In patients with high thrombocyte levels prior to ruxolitinib therapy the mean level was approaching normal by the end of the 1st month of treatment. The median JAK2V617F mutant allele burden at the beginning treatment was 56.5 % (n = 20; 22.5–126.1 %). After 6 moths of treatment it accounted for 62.3 % (n = 11; 25.4–79.7 %) and in 12 months accounted for 47.4 % (n = 12; 14.2–102.2 %). By the time of the analysis 42 of 48 patients continued the ruxolitinib treatment (88 %). Death occurred in 4 patients. Overall 1-year (92 %) and 2-year (87 %) survival corresponds to the data of COMFORT-I, COMFORT-II and JUMP clinical trials.

Conclusion. Ruxolitinib showed to be an effective treatment for myelofibrosis. The most pronounced and rapid effect ruxolitinib had on the spleen size and the symptoms of intoxication. The tolerability of ruxolitinib was satisfactory in the majority of patients. According to the author’s data, ruxolitinib had a small impact on the JAK2V617F mutant allele burden. The overall survival rate in patients with myelofibrosis, receiving ruxolitinib in the clinical setting was similar to that of in the clinical trials.

Keywords: primary myelofibrosis, post-essential trombocythemia myelofibrosis, post-polycythemia myelofibrosis, JAK2V617F, ruxolitinib, clinical practice, targeted therapy.

Received: February 11, 2017

Accepted: May 22, 2017

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  16. Al-Ali HK, Griesshammer M, le Coutre P, et al. Safety and efficacy of ruxolitinib in an open-label, multicenter, single-arm phase 3b expanded-access study in patients with myelofibrosis: a snapshot of 1144 patients in the JUMP trial. Haematologica. 2016;101(9):1065–73. doi: 10.3324/haematol.2016.143677.

Allogeneic Hematopoietic Stem Cell Transplantation in Myelofibrosis

MV Barabanshchikova, EV Morozova, VV Baikov, IM Barkhatov, NN Mamaev, SN Bondarenko, AL Alyanskii, LS Zubarovskaya, BV Afanas’ev

R.M. Gorbacheva Scientific Research Institute of Pediatric Hematology and Transplantation; Academician I.P. Pavlov First St. Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022

For correspondence: Lyudmila Stepanovna Zubarovskaya, DSci, Professor, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022; Tel.: +7(812)338-62-64; e-mail: zubarovskaya_ls@mail.ru

For citation: Barabanshchikova MV, Morozova EV, Baikov VV, et al. Allogeneic Hematopoietic Stem Cell Transplantation in Myelofibrosis. Clinical oncohematology. 2016;9(3):279-86 (In Russ).

DOI: 10.21320/2500-2139-2016-9-3-279-286


ABSTRACT

Background & Aims. At present, the allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the only treatment option with curative potential in patients with myelofibrosis (MF), especially in intermediate and high risk categories. The aim of the study is to perform a retrospective analysis of allo-HSCT outcomes in MF patients.

Materials & Methods. Outcomes of allo-HSCT in 11 intermediate-2 (= 3) and high (= 6) risk patients (based on Dynamic International Prognostic Scoring Scale, DIPSSplus) performed in the R.M. Gorbacheva Scientific Research Institute of Pediatric Hematology and Transplantation over the period from 2005 till 2015 were analyzed in the study. Two more patients underwent allo-HSCT in MF blast phase. Two patients received ruxolitinib before allo-HSCT and 1 patient before and after allo-HSCT. Reduced intensity conditioning regimen was used in all cases.

Results. Primary engraftment was documented in 8 patients. 72 % of patients achieved complete hematological remission. Molecular remission and myelofibrosis regression were confirmed in 5 patients. 5 of 11 patients were still with remission and followed-up by the date of the paper submission. The overall two-year survival was 46 %.

Conclusion. Allo-HSCT is an effective treatment option for MF patients. Further trials are required to evaluate an optimal timing for allo-HSCT in MF patients and efficacy of Janus kinase (JAK) inhibitors as pre- and posttransplant therapy in MF.


Keywords: myelofibrosis, allo-HSCT, reduced intensity conditioning regimen, ruxolitinib.

Received: January 28, 2016

Accepted: March 22, 2016

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