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Author Topic: definite alternative to hydroxyurea  (Read 170 times)
ironjustice
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« on: November 26, 2017, 08:57:09 AM »

I ran across this in my files and wonder why I never posted it.

Leuk Lymphoma. 2003 Sep;44(9):1483-8.
Treatment of polycythemia vera and essential thrombocythemia: the role of pipobroman.
Passamonti F1, Lazzarino M.
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Abstract
Pipobroman (PB) is a neutral amide of piperazine with a chemical structure close to that of alkylating agents, although the exact mechanism of action of PB has not been demonstrated. PB has well documented clinical activity in polycythemia vera (PV) and essential thrombocythemia (ET). Recent long-term follow-up studies on PV and ET patients receiving PB have facilitated the definition of the risk of late transformation into myelofibrosis with myeloid metaplasia (MMM) or acute leukemia (AL). This report gives an overview of the treatment with PB in patients with PV and ET focusing on clinical activity, administration dose and schedule, toxicity, impact on short- and long-term complications. From our experience and from the data reported in the literature the high clinical activity of PB in both PVand ET becomes evident. This drug allows, within 3 months, to attain a response in more than 90% of patients, without clinically relevant toxicities. The 10-years risk of thrombosis of patients treated with PB is about 15%, similar to that registered with hydroxyurea, the most widely used agent in PVand ET. The antiproliferative activity of PB on bone marrow megakaryocytes seems of particular value in lowering the occurrence of post-PV and post-ET MMM, whose risk (< 4% at 10 years) is the lowest registered with available treatments. The 10-year risk of acute leukemia with PB is 5% in PVand 3% in ET, which is only slightly higher than that expected as a natural evolution of the disease. In conclusion, the use of PB is a definite alternative to hydroxyurea in patients with PV and ET at high risk of thrombosis.
PMID: 14565648 DOI: 10.3109/10428190309178768
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