Substance
ID:146
Names and Identifiers
Brand Name
XagridAgrylin
Synonyms
BL-4162AAnagrelide HCLAnagrelide HydrochlorideAnagrelide
IUPAC Traditional name
agrylin hydrochloride
IUPAC name
6,7-dichloro-1H,2H,3H,5H-imidazolidino[2,1-b]quinazolin-2-one hydrochloride
Registration numbers
CAS Number
Properties
Physical Property
Hydrophobicity(logP)
2.4
Solubility
Very slightly soluble
Molecule Details
Drug Groups
approved
Description
Anagrelide is a drug used for the treatment of essential thrombocytosis (ET; essential thrombocythemia). It also has been used in the treatment of chronic myeloid leukemia. [Wikipedia]
Indication
For the treatment of patients with thrombocythemia, secondary to myeloproliferative disorders, to reduce the elevated platelet count and the risk of thrombosis and to ameliorate associated symptoms including thrombo-hemorrhagic events.
Pharmacology
Anagrelide is a drug used for the treatment of essential thrombocytosis (ET; essential thrombocythemia). It works by inhibiting the maturation of megakaryocytes into platelets. The exact mechanism of action is unclear, although it is known to be a potent (IC50 = 36nM) inhibitor of phosphodiesterase-III.
Toxicity
There are no reports of overdosage with anagrelide, however thrombocytopenia, which can potentially cause bleeding, is expected from overdosage. Single oral doses of anagrelide at 2,500, 1,500 and 200 mg/kg in mice, rats and monkeys, respectively, were not lethal. Symptoms of acute toxicity were: decreased motor activity in mice and rats and softened stools and decreased appetite in monkeys.
Affected Organisms
Humans and other mammals
Biotransformation
Extensive, with < 1% recovered unchanged in the urine. Metabolized primarily in the liver by cytochrome P450 1A2 (CYP1A2). Recently, it was found that anagrelide is bio-transformed in humans into two major metabolites (6,7-dichloro-3-hydroxy-1,5 dihydro-imidazo[2,1-b]quinazolin-2-one (BCH24426) and 2-amino-5,6-dichloro-3,4,-dihydroquinazoline (RL603). Whether these metabolites have biological activities that may underlie the mode of action of the parent drug is presently unclear.
Half Life
At fasting and at a dose of 0.5 mg of anagrelide, the plasma half-life is 1.3 hours.
References
•
Voglova J, Maisnar V, Beranek M, Chrobak L: [Combination of imatinib and anagrelide in treatment of chronic myeloid leukemia in blastic phase] Vnitr Lek. 2006 Sep;52(9):819-22.
[Pubmed]
•
Petrides PE: Anagrelide: what was new in 2004 and 2005? Semin Thromb Hemost. 2006 Jun;32(4 Pt 2):399-408.
[Pubmed]
•
Harrison CN, Campbell PJ, Buck G, Wheatley K, East CL, Bareford D, Wilkins BS, van der Walt JD, Reilly JT, Grigg AP, Revell P, Woodcock BE, Green AR: Hydroxyurea compared with anagrelide in high-risk essential thrombocythemia. N Engl J Med. 2005 Jul 7;353(1):33-45.
[Pubmed]
External Links
Molecular Spectra
No Data Available
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References
• Voglova J, Maisnar V, Beranek M, Chrobak L: [Combination of imatinib and anagrelide in treatment of chronic myeloid leukemia in blastic phase] Vnitr Lek. 2006 Sep;52(9):819-22. Pubmed
• Harrison CN, Campbell PJ, Buck G, Wheatley K, East CL, Bareford D, Wilkins BS, van der Walt JD, Reilly JT, Grigg AP, Revell P, Woodcock BE, Green AR: Hydroxyurea compared with anagrelide in high-risk essential thrombocythemia. N Engl J Med. 2005 Jul 7;353(1):33-45. Pubmed
• Petrides PE: Anagrelide: what was new in 2004 and 2005? Semin Thromb Hemost. 2006 Jun;32(4 Pt 2):399-408. Pubmed