146464-95-1 Usage
Description
Different sources of media describe the Description of 146464-95-1 differently. You can refer to the following data:
1. Pralatrexate, an injectable DHFR inhibitor, was launched for the treatment of patients with relapsed or refractory PTCL. PTCL is an
aggressive form of non-Hodgkin’s lymphoma (NHL) characterized by
the proliferation of abnormal T-lymphocytes that circulate in the peripheral bloodstream. The inhibition of the folate enzymes DHFR and thymidylate synthase is a well-validated method of cancer treatment.
In vitro, pralatrexate is
slightly less potent than MTX in inhibiting DHFR derived from murine
leukemia L1210 cells (Ki = 18.2 pM vs. 5.75 pM) and human leukemia
CCRF-CEM cells (Ki = 13.4 pM vs. 5.4 pM). However, it is transported
into both types of cells with 10-fold higher efficiency than MTX,
thereby providing a more potent inhibition of cell growth as compared
with MTX. In vivo, intraperitonally administered pralatrexate at 60 mg/
kg twice weekly for three or four doses caused complete lymphoma
regressions in 89, 56, and 30% of HT, RL, and SKI-DLBCL-1 xenografted
mice, respectively, whereas a similar dosing of MTX at 40 mg/kg twice
weekly did not produce complete regression. The posttreatment tumor
diameter was also smaller in pralatrexate-treated animals.
2. Pralatrexate is a dihydrofolate reductase (DHFR) inhibitor (Ki = 13.4 pM) and antifolate. It inhibits growth of CCRF-CEM acute lymphocytic leukemia cells (IC50 = 0.04 μM), MDA-468, SK-BR-3, and ZR-75-1 breast cancer cells (IC50s = 0.11, 0.28, and 0.26 μM, respectively), and SK-LC8 and SK-LC16 non-small cell lung cancer cells (NSCLC; IC50s = 0.42 and 0.11 μM, respectively). In vivo, pralatrexate increases median survival from 21 to 40 days when administered in 4 doses of 15 mg/kg over 11 days in an H9 T cell lymphoma mouse xenograft model. Pralatrexate is transported into cells via the reduced folate carrier (RFC) and undergoes polyglutamation by folylpolyglutamate synthetase (FPGS) to a greater extent than methotrexate or pemetrexed . Formulations containing pralatrexate have been used in the treatment of relapsed or refractory peripheral T cell lymphoma.
Originator
SRI International/ Southern Research Institute/Sloan-Kettering (US)
Uses
An antifolate with high affinity for the reduced folate carrier-type 1, produces marked complete and durable remissions in a diversity of chemotherapy refractory cases of T-cell lymphoma.
Definition
ChEBI: A pteridine that is the N-4-[1-(2,4-diaminopteridin-6-yl)pent-4-yn-2-yl]benzoyl derivative of L-glutamic acid. Used for treatment of Peripheral T-Cell Lymphoma, an aggressive form of non-Hodgkins lymphoma.
Brand name
Folotyn
Clinical Use
Pralatrexate, an injectable dihydrofolate reductase (DHFR)
inhibitor, has a superior potency and toxicity profile compared to
other DHFR inhibitors. In 2009, the compound was launched by
Allos and approved in the U.S. for the treatment of patients with
relapsed or refractory peripheral T-cell lymphoma (PTCL) as a single
agent. It is the first drug approved for this indication.70 In 2010,
orphan drug designation was received in the E.U. for the treatment
of cutaneous T-cell lymphoma (CTCL).
Side effects
The most common adverse reactions associated with pralatrexate are mucositis, thrombocytopenia, nausea, and fatigue. Folic acid and vitamin B12 supplements are administered as adjunct therapies to potentially reduce pralatrexate-related hematological toxicity and mucositis.
Synthesis
The chemical synthesis of pralatrexate starts with the alkylation of the anion of dimethyl homoterephthalate with propargyl bromide, promoted by potassium hydride in dimethylformamide, to afford the corresponding a-propargyl diester. Further alkylation of the potassium salt of a-propargyl diester with 2,4-diamino-6-(bromomethyl)pteridine followed by saponification with sodium hydroxide yields a diacid intermediate (2,4diamino- 4-deoxy-10-propargyl-10-deazapteroic acid). Mono-decarboxylation of the diacid intermediate by heating in dimethylsulfoxide at 120 C, followed by coupling with diethyl L-glutamate, and subsequent ester hydrolysis with sodium hydroxide yields pralatrexate.
references
[1]. izbicka e, diaz a, streeper r, et al. distinct mechanistic activity profile of pralatrexate in comparison to other antifolates in in vitro and in vivo models of human cancers. cancer chemother pharmacol, 2009, 64(5): 993-999. [2]. serova m, bieche i, sablin mp, et al. single agent and combination studies of pralatrexate and molecular correlates of sensitivity. br j cancer, 2011, 104(2): 272-280.
Check Digit Verification of cas no
The CAS Registry Mumber 146464-95-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,6,4,6 and 4 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 146464-95:
(8*1)+(7*4)+(6*6)+(5*4)+(4*6)+(3*4)+(2*9)+(1*5)=151
151 % 10 = 1
So 146464-95-1 is a valid CAS Registry Number.
InChI:InChI=1/C23H23N7O5/c1-2-3-14(10-15-11-26-20-18(27-15)19(24)29-23(25)30-20)12-4-6-13(7-5-12)21(33)28-16(22(34)35)8-9-17(31)32/h1,4-7,11,14,16H,3,8-10H2,(H,28,33)(H,31,32)(H,34,35)(H4,24,25,26,29,30)/t14?,16-/m0/s1
146464-95-1Relevant articles and documents
Preparation method of pralatrexate
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Paragraph 0028-0045, (2018/06/04)
The invention belongs to the technical field of medicine and particularly relates to a preparation method of pralatrexate finished products. The method comprises the following steps: by taking PLQS-6as a raw material and respectively taking acetone, methy
IMPROVED PROCESS FOR THE PREPARATION OF PRALATREXATE
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, (2015/07/15)
An improved process for the preparation of Pralatrexate which is less hazardous. The invention further relates to novel intermediates and process thereof useful for the preparation of Pralatrexate. The present invention also relates to a substantially pure Pralatrexate and a process for obtaining the same in high yield.
PROCESS FOR PRALATREXATE
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, (2014/05/24)
The present invention provides a novel process for the purification of alpha-propargylhomoterephthalic acid dimethyl ester substantially free of homoterephthalic acid dimethyl ester. The present invention also provides a novel process for the purification of pralatrexate.
