Pemetrexed Disodium Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R36/38:Reizt die Augen und die Haut.
R60:Kann die Fortpflanzungsfähigkeit beeinträchtigen.
R61:Kann das Kind im Mutterleib schädigen.
R68:Irreversibler Schaden möglich.
S-Sätze Betriebsanweisung:
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
Chemische Eigenschaften
Crystalline Solid
Definition
ChEBI: An organic sodium salt that is the disodium salt of N-{4-[2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-L-glutamic acid. Inhibits thymidylate synthase (TS), 4
1 dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase (GARFT).
Allgemeine Beschreibung
The drug is available in a 100-mg sterile vial for IV use. Thedrug appears to be effective against a range of tumors includingmesothelioma, NSCLC, colorectal cancer, bladdercancer, and lung cancer. The mechanism of action involvesinhibition of TS resulting in inhibition of thymidylate andDNA synthesis. This drug is a pyrrolopyrimidine analog offolate with antifolate activity. Resistance can occur by increasedexpression of TS, decreased binding affinity for TS,or decreased drug transport into cells. The drug is administeredonly via the IV route and distributes to all tissues.Cellular activation to the more potent polyglutamated formsoccurs, and the majority of the dose is excreted unchangedin the urine. The drug interaction and toxicity profiles aresimilar to that of methotrexate.
Mechanism of action
Like methotrexate, it is actively transported into tumor cells through reduced folate carriers and, in polyglutamated form, inhibits the synthesis of pyrimidine and purine-based nucletotides by disrupting folatedependent metabolic processes . In addition to DHFR, this pyrrolopyrimidine-based inhibitor binds tightly to thymidylate synthase and GAR transformylase.
Clinical Use
Pemetrexed is a novel multitarget antifolate used by the IV route for the treatment of advanced or metastatic nonsmall cell lung cancer and in combination with cisplatin in malignant pleural mesothelioma.
Nebenwirkungen
Patients on pemetrexed must take folate and vitamin B12 supplements to reduce the risk of bone marrow suppression (neutropenia, thrombocytopenia, and anemia) and GI side effects. Pretreatment with corticosteroids can reduce the risk of drug-induced skin rash. Pemetrexed has a half-life of 3.5 hours and is excreted primarily unchanged via the kidneys. Significant cross-resistance has been noted between pemetrexed and other pyrimidine and folate antagonists.
Pemetrexed Disodium Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
