Clinical trial NCT00866762: A Study of the Efficacy of MK-0683 in Patients With Polycythaemia Vera and Essential Thrombocythaemia
Official title: A Phase II Study of MK-0683 in Patients With Polycythaemia Vera and Essential Thrombocythaemia.
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: PHASE2
Conditions: Polycythemia Vera
Essential Thrombocythemia
Keywords: Polycythaemia Vera
Polycythemia Vera
Essential Thrombocythaemia
Essential Thrombocythemia
HDAC-inhibitor
Haematology
Hematology
Haematological disorder
Haematological disease
Hematological disorder
Hematological disease
Lead sponsor: Copenhagen University Hospital at Herlev
Sponsor class: OTHER
First posted: 2009-03-20
Enrollment: 60
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The aim of the present study is to evaluate the efficacy and safety of MK-0683 in the treatment of PV and ET. This agent has most recently been shown to be a potent inhibitor of the autonomous proliferation of haematopoietic cells of PV and ET patients carrying the JAK2 V617F mutation. Accordingly, it may be anticipated that MK-0683 - by decreasing the JAK2 allele burden - may influence clonal myeloproliferation and in vivo granulocyte, platelet and endothelial activation , which are considered to be major determinants of morbidity and mortality ( thrombosis, bleeding, extramedullary haematopoiesis , myelofibrosis ) in these disorders. The effects of MK-0683 at the molecular level will be studied by global/ focused gene expression profiling, epigenome profiling and proteomics.


Eligibility criteria: Inclusion Criteria:

* Male or female patient \> 18 years of age AND
* A confirmed diagnosis of PV AND
* Biochemical evidence of active disease as defined by:

  * a need for phlebotomy within last 3 months
  * a leukocyte count \> 10 x 10\^9/L in the absence of infection or inflammation (normal CRP) and/or (PV/ET)
  * a platelet count \> 450 x 10\^9/L in the absence of infection or inflammation (normal CRP)(PV/ET) OR
* Male or female patient \> 18 years of age AND
* A confirmed diagnosis of ET AND
* Biochemical evidence of active disease as defined by \*a platelet count \> 450 x 10\^9/L in the absence of infection or inflammation

Inclusion Criteria for both PV and ET:

* Newly diagnosed or previously treated patient in chronic phase OR
* Advanced phase PV or ET as defined by blasts of \> 1 x 10\^9/L in the peripheral blood and/or white cell count \> 30 x 10\^9/L OR
* Resistant or refractory PV or ET as defined by haemoglobin \< 10.5 gm/dl with a platelet count \> 600 x 10\^9/L on current therapy OR
* Cycling platelet counts on therapy OR
* Intolerant to other therapies defined by patients with PV or ET who have side effects on current therapies preventing continuation (leg ulcers on hydroxycarbamide, unacceptable fatigue etc on interferon)

Exclusion Criteria:

* A platelet count \> 1500 x 10\^9/L (a need for cytoreduction in platelet count)
* Patients of childbearing potential without a negative pregnancy test prior to initiation of study drug
* Women who are breast feeding
* Males and females not using contraceptives if sexually active.
* EGOC Performance status Score \> or = 3
* Serum creatinine more than 2 x's teh ULN
* Total serum bilirubin more than 1.5 x's the ULN
* Serum AST/ALT more than 3 x's the ULN
* Interferon alpha within 1 week of day 1
* Hydroxycarbamide within 1 week of day 1
* Anagrelide within 1 week of day 1
* Valproic acid (as an anticonvulsant) within 28 days of day 1
* Any other investigational drug within 28 days of day 1
* Active HIV, HBV or HCV infection
* Any serious concomitant disease or circumstances that could limit compliance with the study, including but not limited to the following: CTCAE grade 3-4 cardiac general \& arrhythmia, or psychiatric or social conditions that may interfere with patient compliance.
* Any prior malignancy with the exception of cervical intraepithelial neoplasia, basal cell carcinoma of the skin, or other localized malignancy that has undergone potentially curative therapy with no evidence of that disease for five years, and who is deemed to be at low risk for recurrence by his/her treating physician.
* Patient has a known allergy or hypersensitivity to study drug.

Primary outcomes:
measure: To evaluate the efficacy of study drug (MK-0683) in the treatment of patients with PV and ET.
timeFrame: one year
Secondary outcomes:
measure: To study changes in bone marrow morphology before and after treatment with study drug.
timeFrame: one year
Other outcomes:
Locations:
city: Copenhagen
country: Denmark
facility: Copenhagen University Hospital Rigshospitalet
city: Esbjerg
country: Denmark
facility: Esberg Hospital
city: Herlev
country: Denmark
facility: Herlev Hospital
city: Odense
country: Denmark
facility: Odense University Hospital
city: Roskilde
country: Denmark
facility: Roskilde Hospital
city: Viborg
country: Denmark
facility: Regional Hospital Viborg
city: Amsterdam
country: Netherlands
facility: VU University Medical Centre
city: Orebro
country: Sweden
facility: University Hospital Orebro
city: Stockholm
country: Sweden
facility: Stockholm South General Hospital (Sodersjukhuset)
city: Stockholm
country: Sweden
facility: Karolinska University Hospital Huddinge
city: Uddevalla
country: Sweden
facility: Sahlgrenska University Hospital & Uddevalla Hospital
city: Uppsala
country: Sweden
facility: Uppsala University Hospital
city: Belfast
country: United Kingdom
facility: Centre for Cancer Research and Cell Biology, Queen's University Belfast
state: Northern Ireland
city: Cardiff
country: United Kingdom
facility: Cardiff University
city: Dudley
country: United Kingdom
facility: Russell's Hall Hospital
city: London
country: United Kingdom
facility: St Thomas' Hospital
Study officials:
affiliation: Department of Hematology, Copenhagen University Hospital Herlev
name: Hans C Hasselbalch, MD
role: PRINCIPAL_INVESTIGATOR
References: