Imatinib has revolutionized the treatment of chronic myeloid leukemia (CML) and is the current standard of care in the treatment of patients with newly diagnosed CML. However, about 30% of patients still show drug resistance or disease progression. Currently, the most widely studied mechanism of TKI resistance in CML patients is mutations in the ABL kinase region. So far, more than 100 kinase domain mutations have been found in disease progression and imatinib resistance. It is estimated that more than 25% of CML patients will change TKI at least once in their lifetime due to drug resistance or intolerance. The 2020 edition of the "Guidelines for the Diagnosis and Treatment of Chronic Myelogenous Leukemia in China" proposes that patients with F317L/V/I/C, V299L and T315A mutations are more likely to obtain clinical efficacy by switching to the second-generation TKI nilotinib; patients with Y253H, E255K/V and F359C/V/I mutations are more likely to obtain clinical efficacy by switching to the second-generation TKI dasatinib; patients with T315I mutations are resistant to both nilotinib and dasatinib. Flumatinib has been shown to be a more potent inhibitor of BCR-ABL1 tyrosine kinase than imatinib. In vitro studies, it has shown that flumatinib inhibits wild-type and common BCR-ABL mutations(Q252H, V299L, F317L/I, M351T, H396P, etc.) more potently, and the anti-mutation spectrum of flumatinib is similar to nilotinib. Therefore, this study is designed to provide clearer guidance for patients with specific BCR-ABL kinase point mutations during CML treatment.

NCT04681820

Conditions

1. CML-CP; Mutation;TKI

Interventions

1. Drug: Flumatinib
2. Drug: Nilotinib

MeSH:Leukemia, Myelogenous, Chronic, BCR-ABL Positive Leukemia, Myelo Leukemia, Myeloid, Chronic-Phase

HPO:Chronic myelogenous leukemia

The 2020 edition of the "Guidelines for the Diagnosis and Treatment of Chronic Myelogenous Leukemia in China" proposes that patients with F317L/V/I/C, V299L and T315A mutations are more likely to obtain clinical efficacy by switching to the second-generation TKI nilotinib; patients with Y253H, E255K/V and F359C/V/I mutations are more likely to obtain clinical efficacy by switching to the second-generation TKI dasatinib; patients with T315I mutations are resistant to both nilotinib and dasatinib. --- F317L --- --- V299L --- --- T315A --- --- Y253H --- --- E255K ---

This is the study to test combination regimen of Nilotinib and Ruxolitinib therapy for the treatment of patients with Philadelphia positive chronic myeloid leukemia (CML) or acute lymphoblastic leukemia (ALL) who is resistant to multiple tyrosine kinase inhibitor therapies with BCR-ABL kinase inhibition activity. Ruxolitinib is a tyrosine kinase inhibitor blocking alternative pathway independent of BCR-ABL mediated pathway, thus having a potential to overcome tyrosine kinase inhibitor resistance in Philadelphia positive CML or ALL patients. Phase I study will be conducted to define a recommended phase II dose (RPTD) and phase II study will examine the hypothesis that combinational approach will increase response rate of resistant CML/ALL patients, thus evaluating efficacy of the combination regimen.

NCT01914484

Conditions

1. Chronic Phase Chronic Myeloid Leukemia
2. Accelerated Phase Chronic Myeloid Leukemia
3. Blastic Phase Chronic Myeloid Leukemia
4. Philadelphia Positive Acute Lymphoblastic Leukemia
5. Resistant to Tyrosine Kinase Inhibitor Therapy

Interventions

1. Drug: Nilotinib
2. Drug: Ruxolitinib

MeSH:Leukemia Leukemia, Myeloid Precursor Cell Lymphoblastic Leukemia-Lymphoma Leukemia, Lymphoid Leukemia, Myelogenous, Chronic, BCR-ABL Positive Blast Crisis Leukemia, Myeloid, Chronic-Phase Leukemia, Myeloid, Accelerated Phase

HPO:Chronic myelogenous leukemia Leukemia Lymphoid leukemia Myeloid leukemia

Developed the T315I, T315A Y253H, E255K/V or F359C/V mutation after any TKI therapy. --- T315I --- --- T315A --- --- Y253H --- --- E255K ---

This is a prospective, single arm, phase II study to assess the effect of nilotinib reduced to half the standard dose for 12 months on treatment-free remission in patients with Chronic Myeloid Leukemia - Chronic Phase (CML-CP) treated with first-line nilotinib who reached a sustained deep molecular response before entering the study.

NCT03874858

Conditions

1. Chronic Myeloid Leukemia

Interventions

1. Drug: Nilotinib

MeSH:Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia Leukemia Myeloid leukemia

2. CML treatment resistant mutation(s) (T315I, E255K/V, Y253H, F359C/V) detected if testing was done in the past (there is no requirement to perform mutation testing at study entry if it was not done in the past). --- T315I --- --- E255K ---

The main purpose of the study is to investigate whether nilotinib treatment can be safely suspended with no recurrence of CML in selected patients who responded optimally on this treatment

NCT01784068

Conditions

1. Chronic Myelogenous Leukemia

Interventions

1. Drug: Nilotinib followed by treatment-free

MeSH:Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia Leukemia Myeloid leukemia

Proportion of patients who develop T3151, E255K/V, Y253H, F359V/C/I mutations on study or any other BCR-ABL mutations in patients who lost MMR after nilotinib suspension. --- E255K ---

Proportion will be calculated by dividing the number of patients who developT315I, E255K/V, Y253H, F359V/C/I mutations after nilotinib suspension by the number of patients who lost MMR. --- E255K ---

The purpose of this study is to determine the feasibility of administering the combination of nilotinib and LDE225 to patients with chronic or accelerated phase of chronic myeloid leukemia and to establish the maximum tolerated dose (MTD) and/or recommended Phase II dose level (RP2D) of LDE225 in combination with nilotinib.

NCT01456676

Conditions

1. Philadelphia Chromosome Positive Chronic Myelogenous Leukemia

Interventions

1. Drug: Nilotinib + LDE225

MeSH:Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive Philadelphia Chromosome

HPO:Chronic myelogenous leukemia Leukemia Myeloid leukemia

Previously documented BCR-ABL Y253H, E255K/V, T315I or F359C/V mutation Other protocol-defined inclusion/exclusion criteria may apply. --- Y253H --- --- E255K ---

A clinical research study to find out if it is safe to stop the drug nilotinib (Tasigna) in chronic myeloid leukemia (CML) patients. Patients who started treatment with imatinib (Gleevec) when they were first diagnosed with CML, then switched to nilotinib (Tasigna) for at least 2 years with the combined time on imatinib (Gleevec) and nilotinib (Tasigna) for at least 3 years and have very small amount of leukemia cells remaining after the nilotinib (Tasigna) treatment will qualify for the study.

NCT01698905

Conditions

1. Chronic Myeloid Leukemia

Interventions

1. Drug: nilotinib

MeSH:Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia Leukemia Myeloid leukemia

Written informed consent obtained prior to any screening procedures Exclusion Criteria: 1. Prior AP, BC or allo-transplant 2. Patient has documented MR4.5 at the time when switched from imatinib to nilotinib 3. Patients with known atypical transcript 4. CML treatment resistant mutation(s) (T315I, E255K/V, Y253H, F359C/V) detected if a testing was done in the past (there is no requirement to perform mutation testing at study entry if it was not done in the past) 5. Dose reductions due to neutropenia or thrombocytopenia in the past 6 months 6. --- T315I --- --- E255K ---

Chronic Graft versus Host Disease (cGvHD) has been identified as the leading cause of late non-relapse mortality in Hemopoietic Stem Cell Transplant (HSCT) survivors. Up to now a standard satisfactory treatment for these patients does not exist. cGVHD is an immune-mediated disease, resulting from a complex interaction between donor and recipient adaptive immunity, but its exact pathogenesis is still incompletely defined. The purpose of this study is to determine safety and efficacy of Nilotinib in a population with steroid-refractory/or steroid-dependent cGvHD with a phase I study. In phase II the MTD will be used to define the efficacy of Nilotinib in a cGvHD steroid- refractory or steroid dependent population, with the same characteristics of the previously Imatinib-treated population.

NCT01810718

Conditions

1. Chronic Graft Versus Host Disease

Interventions

1. Drug: nilotinib

MeSH:Graft vs Host Disease

It has to be noticed that in all the proliferation assays the concentration at which 50% of effect is inhibited of Nilotinib is lower than 50 nM, apart from the two BCR-ABL mutants (E255K and E255V) where the IC50 is 600 to 700 nM. --- E255K ---

The purposes of this study are to investigate expression and frequency of ABL point mutations, a major cause of resistance in imatinib failed CML Asian patients and to find causes of Asian-specific resistance to cancer-targeting therapies through a prospective investigation of dynamics of point mutations and expression of new point mutations during nilotinib treatment.

NCT01562847

Conditions

1. Chronic Myeloid Leukemia

Interventions

1. Drug: Nilotinib

MeSH:Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia

With regard to peculiar point mutations, V299L, F317L, and E25K/V show relative resistance to dasatinib, and p-loop mutations including G250E, Q252H, Y253F/H and E255K/V and F359C/V show relative resistance to nilotinib. --- V299L --- --- F317L --- --- E25K --- --- G250E --- --- Q252H --- --- Y253F --- --- E255K ---

The purpose of the present study is to determine the rate of successful treatment-free remission (TFR) within the first 52 weeks following cessation of ponatinib treatment in patients who achieved MR4. Eligible patients had been previously treated with TKI and when patients achieved an optimal molecular response, TKI treatment was discontinued. After loss of response, patients were treated again with a TKI treatment and have documented MR4 for one year at the time of switch to ponatinib to study entry. MR4 is defined as BCR-ABL transcript level ≤ 0.01% IS or undetectable BCR-ABL levels with sample sensitivity of at least 4 log.

NCT04160546

Conditions

1. Chronic Myeloid Leukemia, Chronic Phase

Interventions

1. Drug: Ponatinib 15 MG
2. Drug: Acetylsalicylic acid 100 MG

MeSH:Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia Myeloid leukemia

3. CML treatment resistant mutation(s) (T315I, E255K/V, Y253H, F359C/V) detected if a testing was done in the past (there is no requirement to perform mutation testing at study entry if it was not done in the past). --- T315I --- --- E255K ---

Describe the purpose of the study: This study aims to evaluate the improvement of Dasatinib-related adverse events and to evaluate the treatment effect and safety by measuring the genetic response of nilotinib with nilotinib 400mg BID for 12 months in Philadelphia chromosome-positive chronic myeloid leukemia patients intolerant to Dasatinib.

NCT02389920

Conditions

1. Leukemia, Chronic Myeloid

Interventions

1. Drug: Nilotinib

MeSH:Leukemia Leukemia, Myelogenous, Chronic, BCR-ABL Positive

HPO:Chronic myelogenous leukemia Leukemia

- Potassium ≥ LLN- Magnesium ≥ LLN- Phosphorus ≥ LLN 7. Voluntary, signed and dated informed consent prior to any study procedures being performed Exclusion Criteria: 1. Subjects with the T315I mutation 2. Mutation known to be associated with low sensitivity to nilotinib(e.g., Y253H, E255K, E255V, F359V), 3. Cardiac function abnormalities as follows are found. --- T315I --- --- Y253H --- --- E255K ---

RATIONALE: BMS-354825 and imatinib mesylate may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. PURPOSE: This randomized phase II trial is studying BMS-354825 to see how well it works compared to imatinib mesylate in treating patients with chronic phase chronic myelogenous leukemia that did not respond to previous imatinib mesylate.

NCT00112775

Conditions

1. Leukemia

Interventions

1. Drug: dasatinib
2. Drug: imatinib mesylate

MeSH:Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive Leukemia, Myeloid, Chronic-Phase

HPO:Chronic myelogenous leukemia Leukemia Myeloid leukemia

DISEASE CHARACTERISTICS: - Diagnosis of chronic phase chronic myelogenous leukemia (CML), meeting all of the following criteria: - Less than 15% blasts in peripheral blood and bone marrow - Less than 20% basophils in peripheral blood - Less than 30% blasts and promyelocytes in peripheral blood and bone marrow - Platelet count ≥ 100,000/mm^3 (unless thrombocytopenia is due to recent therapy) - No extramedullary involvement (other than liver or spleen) - Philadelphia chromosome (Ph)-positive disease by cytogenetic analysis - Must have developed resistant disease during prior treatment with imatinib mesylate* at a dose of 400-600 mg/day**, as defined by 1 of the following: - Loss of major cytogenetic response (MCyR) - Achieved a confirmed MCyR and subsequently no longer meets the MCyR criteria - Documented increase in Ph-positive metaphases by 30% on 2 cytogenetic analyses performed ≥ 4 weeks apart during treatment with imatinib mesylate - Loss of complete hematologic response (CHR) - Achieved a confirmed CHR and subsequently no longer meets the CHR criteria on all asessments over a consecutive 2-week period during treatment with imatinib mesylate - Continuously increasing WBC count on ≥ 2 consecutive evaluations ≥ 2 weeks apart with the final assessment showing a doubling of WBC from the nadir to ≥ 20,000/mm^3 OR an absolute increase in WBC by > 50,000/mm^3 above the lowest count after starting imatinib mesylate - No CHR after 3 months of treatment with imatinib mesylate at a dose of 400-600 mg/day - No cytogenetic response after 6 months of treatment with imatinib mesylate at a dose of 400-600 mg/day - No MCyR after 12 months of treatment with imatinib mesylate at a dose of 400-600 mg/day NOTE: *Imatinib mesylate does not need to be the most recent treatment for CML NOTE: **Imatinib mesylate dose ≤ 600 mg/day - Able to tolerate chronic administration of imatinib mesylate at the highest dose received during prior treatment - No imatinib mesylate-related non-hematologic toxicity ≥ grade 3 - No grade 4 imatinib mesylate-related hematologic toxicity lasting more than 7 days - No imatinib mesylate-related toxicity that led to discontinuation or disruption of dosing for > 4 weeks - No previously identified BCR-ABL mutation of 1 of the following types: - L248V - G250E - Q252H/R - Y253H/F - E255K/V - T315I/D - F317L - H369P/R - No prior diagnosis of accelerated phase or blast crisis CML - Patients who previously met the criteria for accelerated phase or blast crisis CML who achieved CHR during treatment with imatinib mesylate and then subsequently progressed to chronic phase CML are not eligible - Ineligible for or unwilling to undergo hematopoietic stem cell transplantation PATIENT CHARACTERISTICS: Age - 18 and over Performance status - ECOG 0-1 Life expectancy - At least 3 months Hematopoietic - See Disease Characteristics - No history of a significant bleeding disorder unrelated to CML, including any of the following: - Congenital bleeding disorder (e.g., von Willebrand's disease) - Acquired bleeding disorder diagnosed within the past year (e.g. --- L248V --- --- G250E --- --- Q252H --- --- Y253H --- --- E255K ---

acquired anti-factor VIII antibodies) Hepatic - Bilirubin ≤ 2.0 times upper limit of normal (ULN) - ALT and AST ≤ 2.5 times ULN Renal - Creatinine ≤ 1.5 times ULN - Total serum or ionized calcium normal (supplementation allowed) Cardiovascular - Heart rate ≥ 50 beats/minute by EKG - No myocardial infarction within the past 6 months - No uncontrolled angina within the past 3 months - No congestive heart failure within the past 3 months - No diagnosed or suspected congenital long QT syndrome - No history of clinically significant ventricular arrhythmias (e.g., ventricular tachycardia, ventricular fibrillation, or torsades de Pointes) - No prolonged QTc interval (i.e., > 450 msec) by EKG using Bazett's correction - High Bazett's correction (i.e., > 450 msec) allowed provided Fridericia correction is ≤ 450 msec - No history of second or third degree heart block - Pacemaker allowed - No uncontrolled hypertension - No other uncontrolled or significant cardiovascular disease Other - Not pregnant - No nursing during and for ≥ 3 months after study participation - Negative pregnancy test - Fertile patients must use effective contraception for ≥ 1 month before, during, and for ≥ 3 months after study participation - Magnesium and potassium normal (supplementation allowed) - No serious uncontrolled medical disorder or active infection that would preclude study participation - No dementia or altered mental status that would preclude giving informed consent - No significant bleeding from the gastrointestinal tract within the past 6 months - No evidence of organ dysfunction or any clinically significant deviation from normal on physical examination, vital signs, EKG, or clinical laboratory determinations unrelated to CML that would preclude study participation - No prisoners or patients who are involuntarily incarcerated for treatment of either a psychiatric or physical (e.g., infectious disease) illness PRIOR CONCURRENT THERAPY: Biologic therapy - More than 14 days since prior interferon Chemotherapy - More than 14 days since prior cytarabine - Prior or concurrent hydroxyurea for elevated WBC (i.e., WBC > 50,000/mm^3) allowed Endocrine therapy - Not specified Radiotherapy - Not specified Surgery - Not specified Other - More than 7 days since prior imatinib mesylate - At least 7 days since prior and no concurrent low-dose aspirin (≤ 325 mg/day) - At least 14 days since prior and no concurrent high-dose aspirin (> 325 mg/day) - More than 14 days since prior targeted small molecule anticancer agents - More than 28 days since prior investigational or antineoplastic agents except hydroxyurea or anagrelide - At least 5 days or 5 half-lives (whichever is greater) since prior and no concurrent drugs that carry a risk of causing torsades de Pointes, including any of the following: - Quinidine - Procainamide - Disopyramide - Amiodarone - Sotalol - Ibutilide - Dofetilide - Erythromycin - Clarithromycin - Chlorpromazine - Haloperidol - Mesoridazine - Thioridazine - Pimozide - Ziprasidone - Cisapride - Bepridil - Droperidol - Methadone - Arsenic trioxide - Chloroquine - Domperidone - Halofantrine - Levomethadyl - Pentamidine - Sparfloxacin - Lidoflazine - At least 5 days or 5 half-lives (whichever is greater) since prior and no concurrent medication that directly inhibits platelet function (except anagrelide for thrombocytosis due to CML), including any of the following: - Dipyridamole - Epoprostenol - Epitifibatide - Clopidogrel - Cilostazol - Abciximab - Ticlopidine - At least 5 days or 5 half-lives (whichever is greater) since prior and no concurrent anticoagulants (e.g., warfarin, heparin, or low molecular weight heparin [e.g., danaparoid, dalteparin, tinzaparin, or enoxaparin]) - Concurrent prophylactic low-dose warfarin for prevention of catheter thrombosis and heparin-flush for IV lines allowed - No prior BMS-354825 - No concurrent CYP3A4 inhibitors or inducers, including any of the following: - Ketoconazole - Ritonavir - Rifampin - Efavirenz - No other concurrent therapy for CML DISEASE CHARACTERISTICS: - Diagnosis of chronic phase chronic myelogenous leukemia (CML), meeting all of the following criteria: - Less than 15% blasts in peripheral blood and bone marrow - Less than 20% basophils in peripheral blood - Less than 30% blasts and promyelocytes in peripheral blood and bone marrow - Platelet count ≥ 100,000/mm^3 (unless thrombocytopenia is due to recent therapy) - No extramedullary involvement (other than liver or spleen) - Philadelphia chromosome (Ph)-positive disease by cytogenetic analysis - Must have developed resistant disease during prior treatment with imatinib mesylate* at a dose of 400-600 mg/day**, as defined by 1 of the following: - Loss of major cytogenetic response (MCyR) - Achieved a confirmed MCyR and subsequently no longer meets the MCyR criteria - Documented increase in Ph-positive metaphases by 30% on 2 cytogenetic analyses performed ≥ 4 weeks apart during treatment with imatinib mesylate - Loss of complete hematologic response (CHR) - Achieved a confirmed CHR and subsequently no longer meets the CHR criteria on all asessments over a consecutive 2-week period during treatment with imatinib mesylate - Continuously increasing WBC count on ≥ 2 consecutive evaluations ≥ 2 weeks apart with the final assessment showing a doubling of WBC from the nadir to ≥ 20,000/mm^3 OR an absolute increase in WBC by > 50,000/mm^3 above the lowest count after starting imatinib mesylate - No CHR after 3 months of treatment with imatinib mesylate at a dose of 400-600 mg/day - No cytogenetic response after 6 months of treatment with imatinib mesylate at a dose of 400-600 mg/day - No MCyR after 12 months of treatment with imatinib mesylate at a dose of 400-600 mg/day NOTE: *Imatinib mesylate does not need to be the most recent treatment for CML NOTE: **Imatinib mesylate dose ≤ 600 mg/day - Able to tolerate chronic administration of imatinib mesylate at the highest dose received during prior treatment - No imatinib mesylate-related non-hematologic toxicity ≥ grade 3 - No grade 4 imatinib mesylate-related hematologic toxicity lasting more than 7 days - No imatinib mesylate-related toxicity that led to discontinuation or disruption of dosing for > 4 weeks - No previously identified BCR-ABL mutation of 1 of the following types: - L248V - G250E - Q252H/R - Y253H/F - E255K/V - T315I/D - F317L - H369P/R - No prior diagnosis of accelerated phase or blast crisis CML - Patients who previously met the criteria for accelerated phase or blast crisis CML who achieved CHR during treatment with imatinib mesylate and then subsequently progressed to chronic phase CML are not eligible - Ineligible for or unwilling to undergo hematopoietic stem cell transplantation PATIENT CHARACTERISTICS: Age - 18 and over Performance status - ECOG 0-1 Life expectancy - At least 3 months Hematopoietic - See Disease Characteristics - No history of a significant bleeding disorder unrelated to CML, including any of the following: - Congenital bleeding disorder (e.g., von Willebrand's disease) - Acquired bleeding disorder diagnosed within the past year (e.g. --- L248V --- --- G250E --- --- Q252H --- --- Y253H --- --- E255K ---

The purpose of this study is to test the safety of a new combination of three oral drugs in Ph+ ALL. These drugs are dexamethasone, dasatinib, and ruxolitinib. All three drugs have been studied before in humans. This is a phase I study in which ruxolitinib dose will start low for the first patient together with dexamethasone plus dasatinib. If this dose does not cause a bad side effect, the ruxolitinib dose will slowly be made higher as new patients take part in the study. This will help the investigators find the right dose of ruxolitinib to give together with dexamethasone and dasatinib that will be used in future studies

NCT02494882

Conditions

1. Acute Lymphoblastic Leukemia

Interventions

1. Drug: Ruxolitinib
2. Drug: Dasatinib
3. Drug: Dexamethasone

MeSH:Leukemia Precursor Cell Lymphoblastic Leukemia-Lymphoma Leukemia, Lymphoid Philadelphia Chromosome

HPO:Leukemia Lymphoid leukemia

L248R, L248V, Q252H, E255K, V299L, T315A, T315I, F317C, F317L, F317S, F317V) - Relapsed or refractory Ph-like ALL without prior exposure to dasatibin and with mutations or rearrangements of genes conferring sensitivity to dasatibin (ABL, CSF1R, PDGFRB) or ruxolitinib (CRLF2, JAK3, EPOR, TSLP) - Newly diagnosed or relapsed CML in lymphoid blast crisis - Confirmation of Philadelphia chromosome positivity by cytogenetics (karyotype/FISH) and/or molecular tests (BCR-ABL1 transcripts) - Acceptable end-organ function, except for documented exclusions for organ function compromise due to ALL itself - ECOG performance status ≤ 2 - Men and women of childbearing potential must be willing to practice an effective method of birth control during treatment and for at least 4 months following treatment on study Exclusion Criteria: - Ph-negative ALL - Patients with dominant leukemic clone bearing documented bcr-abl mutations enabling bcr-abl TKI resistance at diagnosis - Mature B-cell (Burkitt's) ALL - Serum creatinine > 1.5x ULN and calculated creatinine clearance, based on a 24-hour urine collection, < 30 mL/min--unless related to ALL/tumor lysis syndrome and able to be corrected - Direct Bilirubin > 2x ULN; AST/ALT > 10x ULN, unless related to ALL liver infiltration. --- L248R --- --- L248V --- --- Q252H --- --- E255K ---