Dzhariyat Shikhbabaeva | S.P. Botkin memorial hospital, Russia, Moscow (original) (raw)

Papers by Dzhariyat Shikhbabaeva

Research paper thumbnail of PF-114 in Patients Failing Prior Tyrosine Kinase-Inhibitor Therapy Including BCR::ABL1T315I

Blood

Background: Not everyone with CML responds optimally to TKI-therapy, especially those with BCR::A... more Background: Not everyone with CML responds optimally to TKI-therapy, especially those with BCR::ABL1T315I. PF-114 is a 4 th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCR::ABL1 isoforms including BCR::ABL1T315I. We present final results of a phase-1 study (NCT02885766). Methods: 3+3 dose-escalation study to determine maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). Secondary objectives included safety and efficacy based on haematological, cytogenetic and molecular response criteria. Adverse events (AEs) were graded using NCI-CTCAE v4.03. Results: 51 subjects (5 with accelerated phase CML, 46 - with chronic CML), 23 males, were studied. Daily doses were 50-600 mg/d given once daily continuously. Median age was 50 y (range, 29-82 y). Median CML duration pre-study was 10 y (range, 0.3-23 y). 16 subjects had BCR::ABL1T315I. 25 subjects received ≥ 3 prior TKIs. Median follow-up was ≥ 31 mo and median exposure, 6 mo (range, 0.4-52). ...

Research paper thumbnail of Evaluation of Thrombopoietin-Receptor Agonists (Tpo-Ras) «Stop-Therapy» in Idiopathic Thrombocytopenic Purpura (Itp)

Research paper thumbnail of Epidemiology of Multiple Myeloma (MM) in Moscow (Russia)

Research paper thumbnail of A Retrospective Analysis of Immune Thrombocytopenia Patients Treatment Results After Sequential Switching of Thrombopoietic Receptor-Agonists

Research paper thumbnail of Genetic Markers of Hereditary Thrombophilia and Risk of Thrombotic Complications in Patients with Polycythemia Vera

Clinical oncohematology

Обоснование. Тромботические осложнения-одна из основных проблем в лечении истинной полицитемии (И... more Обоснование. Тромботические осложнения-одна из основных проблем в лечении истинной полицитемии (ИП). Они ухудшают качество жизни больных и могут стать причиной летального исхода. Тромботический эпизод часто служит первым событием, ведущим к постановке диагноза данного гематологического заболевания. Патогенез тромбозов при миелопролиферативных новообразованиях, в частности ИП, сложный. Назначение антиагрегантов в отсутствие тромбозов, а также антикоагулянтов после тромботических событий требует особого внимания и разработки соответствующих рекомендаций. Назначение антикоагулянтов невозможно без учета риска геморрагических осложнений, также характерных для миелопролиферативных новообразований. Цель. Оценка влияния генетических маркеров наследственной тромбофилии на риск развития тромботических осложнений у больных ИП. Методы. В настоящей работе анализу подвергнуты данные 116 больных ИП, обследованных на наличие ряда маркеров наследственной тромбофилии. Это варианты генов фактора V (G1691A, лейденская мутация), протромбина, метилентетрагидрофолатредуктазы (MTHFR), фибриногена (FI), ингибитора активатора плазминогена (PAI-1), тромбоцитарного рецептора фибриногена (GPIIIA). Изучена частота указанных маркеров, а также их роль в развитии тромбозов у данной категории больных. Результаты. В работе определена частота различных маркеров наследственной тромбофилии у больных ИП. В группах больных с тромбозами и без таковых выявлены статистически значимые различия частоты обнаружения различных генетических маркеров наследственной тромбофилии и уровня гомоцистеина. Заключение. Наличие маркеров наследственной тромбофилии у больных ИП в дебюте заболевания может служить убедительным аргументом в пользу назначения адекватной антиагрегантной и антикоагулянтной терапии. Обоснована необходимость проведения дальнейших исследований по изучению роли маркеров наследственной тромбофилии в определении прогностических особенностей течения заболевания и в оценке риска тромботических осложнений при ИП.

Research paper thumbnail of Molecular Genetic Markers and Clinical Characteristics of Essential Thrombocythemia

Clinical oncohematology

Background & Aims. The presence of different molecular genetic markers of clonality (mutations in... more Background & Aims. The presence of different molecular genetic markers of clonality (mutations in JAK2, MPL, CALR) or their absence (triple negative status, TN) in essential thrombocythemia (ET) indicates a biological heterogeneity of the disease and can determine its clinical forms. The aim was to evaluate the association of molecular genetic markers with the clinical form and the prognosis of ET. Materials & Methods. We analyzed the data of 240 patients with ET at the age of 20-91 years (median age 58.7 years), who were observed in the Russian Research Institute of Hematology and Transfusiology from 1999 to 2016 (median observation period 37.2 months). Results. The JAK2V617F (JAK2+) mutation was found in 182 (75.9 %) of 240 patients. CALR (CALR+) mutations were found in 30 (12.5 %): type 1 (CALP7+) mutations in 13/30 (43.3 %) and type 2 (CALR2+) in 17/30 (56.7 %). MPL (MPL+) mutations were found in only 2 (0.8 %) of 240 patients. None of the mutations were detected in 26 (10.8 %) ...

Research paper thumbnail of Chronic Myeloid Leukemia: Long-Term Experience of Target Therapy

Clinical oncohematology, 2016

Актуальность и цели. Расшифровка ключевых аспектов патогенеза хронического миелолейкоза (ХМЛ), ра... more Актуальность и цели. Расшифровка ключевых аспектов патогенеза хронического миелолейкоза (ХМЛ), разработка и внедрение лекарственных средств таргетной терапии позволили коренным образом изменить прогноз ранее фатального заболевания. Результаты многочисленных клинических исследований показали абсолютное превосходство ингибиторов тирозинкиназ над ранее существовавшими методами лечения. Вместе с тем клинические исследования имеют ограничения в отборе пациентов, условиях и сроках проведения лечения. Обобщение собственных результатов таргетной терапии ХМЛ с 2003 по 2015 г. является важным аргументом для внедрения инновационных препаратов в широкую клиническую практику. Цель-анализ собственного опыта таргетной терапии ХМЛ, а также сравнение результатов собственной клинической практики с данными международных клинических исследований. Методы. В работе использовались амбулаторные карты, истории болезни пациентов с ХМЛ, наблюдавшихся в консультативно-поликлиническом отделении гематологии ФГБУ «Российский научно-исследовательский институт гематологии и трансфузиологии» ФМБА в течение последних 12 лет. Для сравнительного анализа использовались опубликованные результаты многоцентровых клинических исследований по применению ингибиторов тирозинкиназ при ХМЛ. Изучали первичную заболеваемость и распространенность ХМЛ, результаты таргетной терапии первой и последующих линий с оценкой показателей выживаемости, побочных эффектов препаратов, характера ответа (гематологический, цитогенетический и молекулярный). Результаты. Анализу подвергнут опыт лечения 208 больных ХМЛ. При использовании иматиниба клинико-гема-MYELOID MALIGNANCIES

Research paper thumbnail of The Potential Impact of Switch to Second Generation Tyrosine Kinase Inhibitors in Chronic Myeloid Leukemia Patients in Chronic Phase Who Had No Optimal Response to 3 Months of Initial Imatinib Therapy

Research paper thumbnail of Prognostic Value of the Rate of BCR-ABL Decline for Patients with Chronic Myelogenous Leukemia in Chronic Phase on Tyrosine Kinase Inhibitors Treatment

Blood

Objectives and background: Introduction of tyrosine kinase inhibitor (TKI) for the treatment of c... more Objectives and background: Introduction of tyrosine kinase inhibitor (TKI) for the treatment of chronic myeloid leukemia (CML) led to favorable outcome in the majority of patients.About 70% of patients with early molecular response (BCR-ABLIS ≤ 10% at 3-months) have 5-year overall survival of 95%. Nonetheless, CML patients remain heterogeneous group and several studies in recent years were aimed to personalize treatment based on individual patients’ characteristics. One of them was the study by B. Hanfstein et al. (2014), which showed good prognostic potential of 0.35 ratio BCR-ABL level at 3 months to absolute transcript level at diagnosis[1]. In this study, GUS was used as control gene, but at present ABL is normalization gene for BCR-ABL quantification worldwide. One of the obstacles to use of baseline BCR-ABL/ABL level is a distortion of the results of its measurement (non-linearity) due to the mixture of BCR-ABL with normal ABLgene. During the first month of therapy there takes...

Research paper thumbnail of The Rate of Individual BCR-ABL Decline As an Optimized Predictor of Tyrosine Kinase Inhibitors Treatment Outcome in Chronic Phase CML Patients, Comparison with CML Prognostic Scores and Early Molecular Response Achievement

Blood

Background. About 70% of chronic myeloid leukemia (CML) patients achieve early molecular response... more Background. About 70% of chronic myeloid leukemia (CML) patients achieve early molecular response (BCR-ABLIS2 10% at 3-months) that lead to 5-years overall survival close to 95%. However, CML patients remain heterogeneous group and several studies in recent years were aimed to personalize treatment based on individual patients' characteristics. Our group previously put forward a hypothesis about the prognostic value of individual BCR-ABL declinerate in the first three months of CML therapy1,2. The ratio BCR-ABL at 3 months to baseline had chosen as 0.1 as best cut-off value to predict MMR at 12 months. The aims of this study were to validate our prognostic method in larger group of patients and compare these results according to CML prognostic scores. Patients and methods. Fifty-five patients (median age, 52 years; range 19-84; 24 male and 31 female) with chronic phase CML were included in the study. Patients' distribution for Sokal risk groups were as follows: low-30 / inte...

Research paper thumbnail of PF-114: A 4th Generation Tyrosine Kinase-Inhibitor for Chronic Phase Chronic Myeloid Leukaemia Including BCRABL1T315I

Blood

Background: PF-114 is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-t... more Background: PF-114 is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCR-ABL1 isoforms including BCR-ABL1T315I. We present data from a phase-1 study in patients with chronic or accelerated phase chronic myeloid leukaemia (CML) failing ≥2 TKIs or with BCR-ABL1T315I (NCT02885766) with ≥6 months therapy. Methods: 3+3 dose-escalation study to determine maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). Secondary objectives included safety and efficacy based on haematological, cytogenetic, and molecular criteria. Adverse events (AEs) were graded using NCI-CTCAE v4.03. Results: 51 patients were enrolled. Daily doses were 50 mg (n=3), 100 mg (n=3), 200 mg (n=9), 300 mg (n=11), 400 mg (n=12), 500 mg (n=3), 600 mg (n=6), 750 mg (n=4) given continuously. Median age was 50 years (range, 29-82 years). Median CML duration pre-study was 10 years (range, 0.3-23 years). All patients had baseline ECOG performance scores 0-1. Twelve patients had...

Research paper thumbnail of Phase-1 Study of PF-114 Mesylate in CML Failing Prior Tyrosine Kinase-Inhibitor Therapy

Blood

Background: PF-114 mesylate is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active again... more Background: PF-114 mesylate is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCRABL1 isoforms including those with a BCRABL1T315I. We present data from a phase-1 study in subjects with chronic or accelerated phase chronic myeloid leukaemia (CML) failing ≥2 TKIs or who have BCRABL1T315I (NCT02885766). Methods: 3+3 dose-escalation design to determine maximum tolerated dose (MTD) followed by expanded cohorts for doses ≤MTD. The primary objective was to determine the MTD and identify dose-limiting toxicities (DLTs) during cycle 1 (28 days). Secondary objectives included safety and anti-CML activity based on hematological, cytogenetic, and molecular criteria. Adverse events (AEs) were assessed and graded using NCI-CTCAE v4.03. Results: 51 subjects were enrolled as of June 26, 2018. Daily doses were 50 mg (n=3), 100 mg (n=3), 200 mg (n=9), 300 mg (n=11), 400 mg (n=12), 500 mg (n=3), 600 mg (n=6), 750 mg (n=4) given on a continuous QD schedule. ...

Research paper thumbnail of Russian Experience of Bosutinib Use in Chronic Myeloid Leukemia Patients in Routine Clinical Practice

Blood

Background. The treatment of chronic myeloid leukemia (CML) with tyrosine kinase inhibitors (TKI)... more Background. The treatment of chronic myeloid leukemia (CML) with tyrosine kinase inhibitors (TKI) have diminished death probability and have changed the disease course. Achievement of complete cytogenetic response (CCyR) and major molecular response (MMR) are serve as warranties for freedom of progression and death from CML. There are many of CML patients are needed to change of initial TKI therapy with choice of the most efficient and safe drug for continuous life-long therapy to reach the optimal results of CML treatment. The newest of registered TKI drug in Russia is Bosutinib which has dual BCR-ABL and SRC kinase inhibitory activity and had showed good tolerability and efficacy in case of other TKIs resistance or intolerance. Aim. To analyze of own Bosutinib experience in patients with chronic myeloid leukemia with other TKIs resistance or intolerance and to make comparison with clinical trial results. Materials and methods. Clinical trials results from peer-reviewed journals. O...

Research paper thumbnail of Genetic and Epigenetic Alterations of Ph-Negative Myeloproliferative Neoplasms

Blood

Objectives and background: Genetic mutations result in abnormalities of myelopoietic proteins and... more Objectives and background: Genetic mutations result in abnormalities of myelopoietic proteins and lie in the basis of Ph-negative myeloproliferative neoplasms (MPNs) development and its subsequent progression. Several somatic mutations in JAK2, MPL, TET2, EZH2, ASXL1, CBL, IDH1, IDH2, IKZF1 genes were detected in chronic and blastic phase MPNs. Recent studies have revealed a number of epigenetic alterations that contribute to Ph-negative MPNs pathogenesis and determine the clinical outcome. Mutations involving the EZH2 gene are thought to result in loss of methyltransferase activity suggesting a potential role of tumor suppressor gene silencing as a mechanism in the disease progression. Decrease in ubiquitin ligase activity caused by mutations CBL gene leads to myeloid proliferation. EZH2, CBL mutations are thought to be of prognostic value in MPN’s at the time of transformation to the blastic phase but data are inconsistent and require the further verification.The goal of our resea...

Research paper thumbnail of Prognosis in Primary Myelofibrosis Patients According to Cytogenetic and Molecular Testing Results

Blood

Introduction. The characteristics of pathological clone cells in the Primary Myelofibrosis (PMF) ... more Introduction. The characteristics of pathological clone cells in the Primary Myelofibrosis (PMF) strongly influence on the variability of the clinical course and prognosis. The main of them are type of driver mutation in JAK2, MPL or CALR genes ("clonal markers" (CM)), cytogenetic and epigenetic alterations. It is very important to provide the physicians necessary and sufficient information about the molecular profile of the disease to select the appropriate therapy for the patient. The aim of our study was to investigate mutational diversity in PMF patients from the North-West region of the Russian Federation and to estimate overall survival (OS) depending on the type of CM, cytogenetic and epigenetic features. Materials and methods. We examined 115 patients with PMF (45 male, 70 female). Median age was 59 years (range 19-82). The detection of V617F mutation of JAK2 was carried out for all the patients. JAK2(-) samples were tested for MPL gene 515 codon mutations and 9th ...

Research paper thumbnail of The Devil Is Not As Black As He Is Painted - 3-Year Experience of Treating Newly Diagnosed CML Patients with Imatinib Generics

Blood

Introduction. A generic drug is a pharmaceutical drug considered to be equivalent to a brand-name... more Introduction. A generic drug is a pharmaceutical drug considered to be equivalent to a brand-name product. A generic drug has to contain the same active ingredients as those of the original formulation. Regulatory agencies used to require that generics be identical to their brand-name counterparts with regards to pharmacokinetic properties. In most cases, generic products are available after the patent protection given to a drug's original developer expires. In Russia, a patent protection lasts for a 10-year period from registration of the original drug. To this day, twelve Imatinib generics have been registered in Russia. Aim. To assess the safety and efficacy of Imatinib generics for treatment of newly diagnosed Chronic myelogenous leukemia patients that have been in our center since August 2012. Materials and methods. 30 newly diagnosed CML patients were started on generics. The drugs: 1) GenericPh 100 mg, in capsules (Ph-Syntez, Russia); 2) GenericG 100 mg, in tablets (Labor...

Research paper thumbnail of It Is Safe to Change Horses in the Midstream - 3-Year Experience of Treating CML Patients with Imatinib Generics

Blood

Introduction. The substitution of brand-name drugs with cheaper generics is a modern tendency in ... more Introduction. The substitution of brand-name drugs with cheaper generics is a modern tendency in health-care to decrease the burden on government budget and improve access to efficient treatment. Worldwide, generics have to be identical to the original drug in terms of pharmaceutical (active ingredients) and biological (pharmacokinetic) properties. Unfortunately, in Russia, as in most countries, there are no government regulations of equivalency to a brand-name product regarding dosage, strength, route of administration, quality, performance, and intended use. In Russia, since August 2012 the original Imatinib has almost fully been substituted with generics for the treatment of chronic myelogenous leukemia (CML). Aim. To assess tolerance and efficacy of Imatinib generics in terms of response durability by comparing it with that achieved previously in CML patients, who had received treatment with original Imatinib before switching to the generics. Materials and methods. Seventy-nine ...

Research paper thumbnail of Influence of JAK2V617F Allele Burden on Hematological Response in the Treatment of Polycythemia Vera

Blood

Background. The presence of the JAK2V617F mutation is a major criterion in diagnostic of Polycyth... more Background. The presence of the JAK2V617F mutation is a major criterion in diagnostic of Polycythemia Vera (PV). The role of JAK2V617F allele burden in the progression of PV is not completely understood. The significance of this variable for the progression of the disease, complications development and response to therapy are still a big question mark. Aim. To estimate the significance of the level of JAK2V617F allele burden in the treatment of PV. Methods. Seventy-nine patients (pts), 48 females and 31 males, were included in the study. PV was diagnosed from 1980 to 2016. Median age was 61 years (range, 28 - 85), median of the observation period was 4.9 year (0,2 - 35 years). JAK2V617F allele burden was studied in all pts. Patients received therapy with phlebotomy (erythrocytapheresis), hydroxyurea, interferon-alpha or combined therapy. Hematological response to the therapy was evaluated according to ELN criteria[1]. Differences between the groups were assessed with the Mann-Whitne...

Research paper thumbnail of PF-114 in Patients Failing Prior Tyrosine Kinase-Inhibitor Therapy Including BCR::ABL1T315I

Blood

Background: Not everyone with CML responds optimally to TKI-therapy, especially those with BCR::A... more Background: Not everyone with CML responds optimally to TKI-therapy, especially those with BCR::ABL1T315I. PF-114 is a 4 th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCR::ABL1 isoforms including BCR::ABL1T315I. We present final results of a phase-1 study (NCT02885766). Methods: 3+3 dose-escalation study to determine maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). Secondary objectives included safety and efficacy based on haematological, cytogenetic and molecular response criteria. Adverse events (AEs) were graded using NCI-CTCAE v4.03. Results: 51 subjects (5 with accelerated phase CML, 46 - with chronic CML), 23 males, were studied. Daily doses were 50-600 mg/d given once daily continuously. Median age was 50 y (range, 29-82 y). Median CML duration pre-study was 10 y (range, 0.3-23 y). 16 subjects had BCR::ABL1T315I. 25 subjects received ≥ 3 prior TKIs. Median follow-up was ≥ 31 mo and median exposure, 6 mo (range, 0.4-52). ...

Research paper thumbnail of Evaluation of Thrombopoietin-Receptor Agonists (Tpo-Ras) «Stop-Therapy» in Idiopathic Thrombocytopenic Purpura (Itp)

Research paper thumbnail of Epidemiology of Multiple Myeloma (MM) in Moscow (Russia)

Research paper thumbnail of A Retrospective Analysis of Immune Thrombocytopenia Patients Treatment Results After Sequential Switching of Thrombopoietic Receptor-Agonists

Research paper thumbnail of Genetic Markers of Hereditary Thrombophilia and Risk of Thrombotic Complications in Patients with Polycythemia Vera

Clinical oncohematology

Обоснование. Тромботические осложнения-одна из основных проблем в лечении истинной полицитемии (И... more Обоснование. Тромботические осложнения-одна из основных проблем в лечении истинной полицитемии (ИП). Они ухудшают качество жизни больных и могут стать причиной летального исхода. Тромботический эпизод часто служит первым событием, ведущим к постановке диагноза данного гематологического заболевания. Патогенез тромбозов при миелопролиферативных новообразованиях, в частности ИП, сложный. Назначение антиагрегантов в отсутствие тромбозов, а также антикоагулянтов после тромботических событий требует особого внимания и разработки соответствующих рекомендаций. Назначение антикоагулянтов невозможно без учета риска геморрагических осложнений, также характерных для миелопролиферативных новообразований. Цель. Оценка влияния генетических маркеров наследственной тромбофилии на риск развития тромботических осложнений у больных ИП. Методы. В настоящей работе анализу подвергнуты данные 116 больных ИП, обследованных на наличие ряда маркеров наследственной тромбофилии. Это варианты генов фактора V (G1691A, лейденская мутация), протромбина, метилентетрагидрофолатредуктазы (MTHFR), фибриногена (FI), ингибитора активатора плазминогена (PAI-1), тромбоцитарного рецептора фибриногена (GPIIIA). Изучена частота указанных маркеров, а также их роль в развитии тромбозов у данной категории больных. Результаты. В работе определена частота различных маркеров наследственной тромбофилии у больных ИП. В группах больных с тромбозами и без таковых выявлены статистически значимые различия частоты обнаружения различных генетических маркеров наследственной тромбофилии и уровня гомоцистеина. Заключение. Наличие маркеров наследственной тромбофилии у больных ИП в дебюте заболевания может служить убедительным аргументом в пользу назначения адекватной антиагрегантной и антикоагулянтной терапии. Обоснована необходимость проведения дальнейших исследований по изучению роли маркеров наследственной тромбофилии в определении прогностических особенностей течения заболевания и в оценке риска тромботических осложнений при ИП.

Research paper thumbnail of Molecular Genetic Markers and Clinical Characteristics of Essential Thrombocythemia

Clinical oncohematology

Background & Aims. The presence of different molecular genetic markers of clonality (mutations in... more Background & Aims. The presence of different molecular genetic markers of clonality (mutations in JAK2, MPL, CALR) or their absence (triple negative status, TN) in essential thrombocythemia (ET) indicates a biological heterogeneity of the disease and can determine its clinical forms. The aim was to evaluate the association of molecular genetic markers with the clinical form and the prognosis of ET. Materials & Methods. We analyzed the data of 240 patients with ET at the age of 20-91 years (median age 58.7 years), who were observed in the Russian Research Institute of Hematology and Transfusiology from 1999 to 2016 (median observation period 37.2 months). Results. The JAK2V617F (JAK2+) mutation was found in 182 (75.9 %) of 240 patients. CALR (CALR+) mutations were found in 30 (12.5 %): type 1 (CALP7+) mutations in 13/30 (43.3 %) and type 2 (CALR2+) in 17/30 (56.7 %). MPL (MPL+) mutations were found in only 2 (0.8 %) of 240 patients. None of the mutations were detected in 26 (10.8 %) ...

Research paper thumbnail of Chronic Myeloid Leukemia: Long-Term Experience of Target Therapy

Clinical oncohematology, 2016

Актуальность и цели. Расшифровка ключевых аспектов патогенеза хронического миелолейкоза (ХМЛ), ра... more Актуальность и цели. Расшифровка ключевых аспектов патогенеза хронического миелолейкоза (ХМЛ), разработка и внедрение лекарственных средств таргетной терапии позволили коренным образом изменить прогноз ранее фатального заболевания. Результаты многочисленных клинических исследований показали абсолютное превосходство ингибиторов тирозинкиназ над ранее существовавшими методами лечения. Вместе с тем клинические исследования имеют ограничения в отборе пациентов, условиях и сроках проведения лечения. Обобщение собственных результатов таргетной терапии ХМЛ с 2003 по 2015 г. является важным аргументом для внедрения инновационных препаратов в широкую клиническую практику. Цель-анализ собственного опыта таргетной терапии ХМЛ, а также сравнение результатов собственной клинической практики с данными международных клинических исследований. Методы. В работе использовались амбулаторные карты, истории болезни пациентов с ХМЛ, наблюдавшихся в консультативно-поликлиническом отделении гематологии ФГБУ «Российский научно-исследовательский институт гематологии и трансфузиологии» ФМБА в течение последних 12 лет. Для сравнительного анализа использовались опубликованные результаты многоцентровых клинических исследований по применению ингибиторов тирозинкиназ при ХМЛ. Изучали первичную заболеваемость и распространенность ХМЛ, результаты таргетной терапии первой и последующих линий с оценкой показателей выживаемости, побочных эффектов препаратов, характера ответа (гематологический, цитогенетический и молекулярный). Результаты. Анализу подвергнут опыт лечения 208 больных ХМЛ. При использовании иматиниба клинико-гема-MYELOID MALIGNANCIES

Research paper thumbnail of The Potential Impact of Switch to Second Generation Tyrosine Kinase Inhibitors in Chronic Myeloid Leukemia Patients in Chronic Phase Who Had No Optimal Response to 3 Months of Initial Imatinib Therapy

Research paper thumbnail of Prognostic Value of the Rate of BCR-ABL Decline for Patients with Chronic Myelogenous Leukemia in Chronic Phase on Tyrosine Kinase Inhibitors Treatment

Blood

Objectives and background: Introduction of tyrosine kinase inhibitor (TKI) for the treatment of c... more Objectives and background: Introduction of tyrosine kinase inhibitor (TKI) for the treatment of chronic myeloid leukemia (CML) led to favorable outcome in the majority of patients.About 70% of patients with early molecular response (BCR-ABLIS ≤ 10% at 3-months) have 5-year overall survival of 95%. Nonetheless, CML patients remain heterogeneous group and several studies in recent years were aimed to personalize treatment based on individual patients’ characteristics. One of them was the study by B. Hanfstein et al. (2014), which showed good prognostic potential of 0.35 ratio BCR-ABL level at 3 months to absolute transcript level at diagnosis[1]. In this study, GUS was used as control gene, but at present ABL is normalization gene for BCR-ABL quantification worldwide. One of the obstacles to use of baseline BCR-ABL/ABL level is a distortion of the results of its measurement (non-linearity) due to the mixture of BCR-ABL with normal ABLgene. During the first month of therapy there takes...

Research paper thumbnail of The Rate of Individual BCR-ABL Decline As an Optimized Predictor of Tyrosine Kinase Inhibitors Treatment Outcome in Chronic Phase CML Patients, Comparison with CML Prognostic Scores and Early Molecular Response Achievement

Blood

Background. About 70% of chronic myeloid leukemia (CML) patients achieve early molecular response... more Background. About 70% of chronic myeloid leukemia (CML) patients achieve early molecular response (BCR-ABLIS2 10% at 3-months) that lead to 5-years overall survival close to 95%. However, CML patients remain heterogeneous group and several studies in recent years were aimed to personalize treatment based on individual patients' characteristics. Our group previously put forward a hypothesis about the prognostic value of individual BCR-ABL declinerate in the first three months of CML therapy1,2. The ratio BCR-ABL at 3 months to baseline had chosen as 0.1 as best cut-off value to predict MMR at 12 months. The aims of this study were to validate our prognostic method in larger group of patients and compare these results according to CML prognostic scores. Patients and methods. Fifty-five patients (median age, 52 years; range 19-84; 24 male and 31 female) with chronic phase CML were included in the study. Patients' distribution for Sokal risk groups were as follows: low-30 / inte...

Research paper thumbnail of PF-114: A 4th Generation Tyrosine Kinase-Inhibitor for Chronic Phase Chronic Myeloid Leukaemia Including BCRABL1T315I

Blood

Background: PF-114 is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-t... more Background: PF-114 is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCR-ABL1 isoforms including BCR-ABL1T315I. We present data from a phase-1 study in patients with chronic or accelerated phase chronic myeloid leukaemia (CML) failing ≥2 TKIs or with BCR-ABL1T315I (NCT02885766) with ≥6 months therapy. Methods: 3+3 dose-escalation study to determine maximum tolerated dose (MTD) and dose-limiting toxicity (DLT). Secondary objectives included safety and efficacy based on haematological, cytogenetic, and molecular criteria. Adverse events (AEs) were graded using NCI-CTCAE v4.03. Results: 51 patients were enrolled. Daily doses were 50 mg (n=3), 100 mg (n=3), 200 mg (n=9), 300 mg (n=11), 400 mg (n=12), 500 mg (n=3), 600 mg (n=6), 750 mg (n=4) given continuously. Median age was 50 years (range, 29-82 years). Median CML duration pre-study was 10 years (range, 0.3-23 years). All patients had baseline ECOG performance scores 0-1. Twelve patients had...

Research paper thumbnail of Phase-1 Study of PF-114 Mesylate in CML Failing Prior Tyrosine Kinase-Inhibitor Therapy

Blood

Background: PF-114 mesylate is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active again... more Background: PF-114 mesylate is a 4th-generation oral tyrosine kinase-inhibitor (TKI) active against wild-type and mutated BCRABL1 isoforms including those with a BCRABL1T315I. We present data from a phase-1 study in subjects with chronic or accelerated phase chronic myeloid leukaemia (CML) failing ≥2 TKIs or who have BCRABL1T315I (NCT02885766). Methods: 3+3 dose-escalation design to determine maximum tolerated dose (MTD) followed by expanded cohorts for doses ≤MTD. The primary objective was to determine the MTD and identify dose-limiting toxicities (DLTs) during cycle 1 (28 days). Secondary objectives included safety and anti-CML activity based on hematological, cytogenetic, and molecular criteria. Adverse events (AEs) were assessed and graded using NCI-CTCAE v4.03. Results: 51 subjects were enrolled as of June 26, 2018. Daily doses were 50 mg (n=3), 100 mg (n=3), 200 mg (n=9), 300 mg (n=11), 400 mg (n=12), 500 mg (n=3), 600 mg (n=6), 750 mg (n=4) given on a continuous QD schedule. ...

Research paper thumbnail of Russian Experience of Bosutinib Use in Chronic Myeloid Leukemia Patients in Routine Clinical Practice

Blood

Background. The treatment of chronic myeloid leukemia (CML) with tyrosine kinase inhibitors (TKI)... more Background. The treatment of chronic myeloid leukemia (CML) with tyrosine kinase inhibitors (TKI) have diminished death probability and have changed the disease course. Achievement of complete cytogenetic response (CCyR) and major molecular response (MMR) are serve as warranties for freedom of progression and death from CML. There are many of CML patients are needed to change of initial TKI therapy with choice of the most efficient and safe drug for continuous life-long therapy to reach the optimal results of CML treatment. The newest of registered TKI drug in Russia is Bosutinib which has dual BCR-ABL and SRC kinase inhibitory activity and had showed good tolerability and efficacy in case of other TKIs resistance or intolerance. Aim. To analyze of own Bosutinib experience in patients with chronic myeloid leukemia with other TKIs resistance or intolerance and to make comparison with clinical trial results. Materials and methods. Clinical trials results from peer-reviewed journals. O...

Research paper thumbnail of Genetic and Epigenetic Alterations of Ph-Negative Myeloproliferative Neoplasms

Blood

Objectives and background: Genetic mutations result in abnormalities of myelopoietic proteins and... more Objectives and background: Genetic mutations result in abnormalities of myelopoietic proteins and lie in the basis of Ph-negative myeloproliferative neoplasms (MPNs) development and its subsequent progression. Several somatic mutations in JAK2, MPL, TET2, EZH2, ASXL1, CBL, IDH1, IDH2, IKZF1 genes were detected in chronic and blastic phase MPNs. Recent studies have revealed a number of epigenetic alterations that contribute to Ph-negative MPNs pathogenesis and determine the clinical outcome. Mutations involving the EZH2 gene are thought to result in loss of methyltransferase activity suggesting a potential role of tumor suppressor gene silencing as a mechanism in the disease progression. Decrease in ubiquitin ligase activity caused by mutations CBL gene leads to myeloid proliferation. EZH2, CBL mutations are thought to be of prognostic value in MPN’s at the time of transformation to the blastic phase but data are inconsistent and require the further verification.The goal of our resea...

Research paper thumbnail of Prognosis in Primary Myelofibrosis Patients According to Cytogenetic and Molecular Testing Results

Blood

Introduction. The characteristics of pathological clone cells in the Primary Myelofibrosis (PMF) ... more Introduction. The characteristics of pathological clone cells in the Primary Myelofibrosis (PMF) strongly influence on the variability of the clinical course and prognosis. The main of them are type of driver mutation in JAK2, MPL or CALR genes ("clonal markers" (CM)), cytogenetic and epigenetic alterations. It is very important to provide the physicians necessary and sufficient information about the molecular profile of the disease to select the appropriate therapy for the patient. The aim of our study was to investigate mutational diversity in PMF patients from the North-West region of the Russian Federation and to estimate overall survival (OS) depending on the type of CM, cytogenetic and epigenetic features. Materials and methods. We examined 115 patients with PMF (45 male, 70 female). Median age was 59 years (range 19-82). The detection of V617F mutation of JAK2 was carried out for all the patients. JAK2(-) samples were tested for MPL gene 515 codon mutations and 9th ...

Research paper thumbnail of The Devil Is Not As Black As He Is Painted - 3-Year Experience of Treating Newly Diagnosed CML Patients with Imatinib Generics

Blood

Introduction. A generic drug is a pharmaceutical drug considered to be equivalent to a brand-name... more Introduction. A generic drug is a pharmaceutical drug considered to be equivalent to a brand-name product. A generic drug has to contain the same active ingredients as those of the original formulation. Regulatory agencies used to require that generics be identical to their brand-name counterparts with regards to pharmacokinetic properties. In most cases, generic products are available after the patent protection given to a drug's original developer expires. In Russia, a patent protection lasts for a 10-year period from registration of the original drug. To this day, twelve Imatinib generics have been registered in Russia. Aim. To assess the safety and efficacy of Imatinib generics for treatment of newly diagnosed Chronic myelogenous leukemia patients that have been in our center since August 2012. Materials and methods. 30 newly diagnosed CML patients were started on generics. The drugs: 1) GenericPh 100 mg, in capsules (Ph-Syntez, Russia); 2) GenericG 100 mg, in tablets (Labor...

Research paper thumbnail of It Is Safe to Change Horses in the Midstream - 3-Year Experience of Treating CML Patients with Imatinib Generics

Blood

Introduction. The substitution of brand-name drugs with cheaper generics is a modern tendency in ... more Introduction. The substitution of brand-name drugs with cheaper generics is a modern tendency in health-care to decrease the burden on government budget and improve access to efficient treatment. Worldwide, generics have to be identical to the original drug in terms of pharmaceutical (active ingredients) and biological (pharmacokinetic) properties. Unfortunately, in Russia, as in most countries, there are no government regulations of equivalency to a brand-name product regarding dosage, strength, route of administration, quality, performance, and intended use. In Russia, since August 2012 the original Imatinib has almost fully been substituted with generics for the treatment of chronic myelogenous leukemia (CML). Aim. To assess tolerance and efficacy of Imatinib generics in terms of response durability by comparing it with that achieved previously in CML patients, who had received treatment with original Imatinib before switching to the generics. Materials and methods. Seventy-nine ...

Research paper thumbnail of Influence of JAK2V617F Allele Burden on Hematological Response in the Treatment of Polycythemia Vera

Blood

Background. The presence of the JAK2V617F mutation is a major criterion in diagnostic of Polycyth... more Background. The presence of the JAK2V617F mutation is a major criterion in diagnostic of Polycythemia Vera (PV). The role of JAK2V617F allele burden in the progression of PV is not completely understood. The significance of this variable for the progression of the disease, complications development and response to therapy are still a big question mark. Aim. To estimate the significance of the level of JAK2V617F allele burden in the treatment of PV. Methods. Seventy-nine patients (pts), 48 females and 31 males, were included in the study. PV was diagnosed from 1980 to 2016. Median age was 61 years (range, 28 - 85), median of the observation period was 4.9 year (0,2 - 35 years). JAK2V617F allele burden was studied in all pts. Patients received therapy with phlebotomy (erythrocytapheresis), hydroxyurea, interferon-alpha or combined therapy. Hematological response to the therapy was evaluated according to ELN criteria[1]. Differences between the groups were assessed with the Mann-Whitne...