Pemetrexed

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Pemetrexed
Pemetrexed.svg
Pemetrexed ball-and-stick.png
Systematic (IUPAC) name
(2S)-2-{[4-[2-(2-amino-4-oxo-1,7-dihydro
pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]amino}
pentanedioic acid
Clinical data
Trade names Alimta
AHFS/Drugs.com monograph
Licence data EMA:Link, US FDA:link
Pregnancy
category
  • US: D (Evidence of risk)
Legal status
Routes of
administration		 Intravenous
Pharmacokinetic data
Bioavailability NA
Protein binding 81%
Metabolism Negligible
Biological half-life 3.5 hours
Excretion Renal
Identifiers
CAS Number 137281-23-3 N
ATC code L01BA04 (WHO)
PubChem CID: 446556
DrugBank DB00642 YesY
ChemSpider 393879 YesY
UNII 04Q9AIZ7NO YesY
KEGG D07472 YesY
ChEMBL CHEMBL225072 YesY
Chemical data
Formula C20H21N5O6
Molecular mass 427.411 g/mol
  • O=C(O)[C@@H](NC(=O)c1ccc(cc1)CCc2cnc3N\C(=N/C(=O)c23)N)CCC(=O)O
  • InChI=1S/C20H21N5O6/c21-20-24-16-15(18(29)25-20)12(9-22-16)6-3-10-1-4-11(5-2-10)17(28)23-13(19(30)31)7-8-14(26)27/h1-2,4-5,9,13H,3,6-8H2,(H,23,28)(H,26,27)(H,30,31)(H4,21,22,24,25,29)/t13-/m0/s1 YesY
  • Key:WBXPDJSOTKVWSJ-ZDUSSCGKSA-N YesY
 NYesY (what is this?)  (verify)

Pemetrexed (brand name Alimta) is a chemotherapy drug manufactured and marketed by Eli Lilly and Company. Its indications are the treatment of pleural mesothelioma and non-small cell lung cancer.

History

The molecular structure of pemetrexed was developed by Edward C. Taylor at Princeton University and clinically developed by Indianapolis based drug maker, Eli Lilly and Company in 2004.

It has been researched in the PARAMOUNT trial.

Mechanism of action

Pemetrexed is chemically similar to folic acid and is in the class of chemotherapy drugs called folate antimetabolites. It works by inhibiting three enzymes used in purine and pyrimidine synthesis—thymidylate synthase (TS), dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase[1][2] (GARFT). By inhibiting the formation of precursor purine and pyrimidine nucleotides, pemetrexed prevents the formation of DNA and RNA, which are required for the growth and survival of both normal cells and cancer cells.

File:Pathway of tetrahydrofolate and antimetabolites.pdf

Clinical use

In February 2004, the Food and Drug Administration approved pemetrexed for treatment of malignant pleural mesothelioma, a type of tumor of the lining of the lung, in combination with cisplatin[3] for patients whose disease is either unresectable or who are not otherwise candidates for curative surgery.[4] In September 2008, the FDA granted approval as a first-line treatment, in combination with cisplatin, against locally-advanced and metastatic non-small cell lung cancer (NSCLC) in patients with non-squamous histology.[5][6][7] A Phase III study showed benefits of maintenance use of pemetrexed for non-squamous NSCLC.[8] Activity has been shown in malignant peritoneal mesothelioma.[9] Trials are currently testing it against esophagus and other cancers.

Carboplatin

Pemetrexed is also recommended in combination with carboplatin for the first-line treatment of advanced non-small cell lung cancer.[10] However, the relative efficacy or toxicity of pemetrexed-cisplatin versus pemetrexed-carboplatin has not been established beyond what is generally thought about cisplatin or carboplatin doublet drug therapy[11]

Supplementation

Patients should take folic acid and vitamin B12 supplement even if levels are normal when they are on pemetrexed therapy.[12][13] (In clinical trials for mesothelioma, folic acid and B12 supplementation reduced the frequency of adverse events.) It is also recommended for patients to be on a steroid (e.g., dexamethasone 4 mg twice daily) on the day prior, day of, and day after Pemetrexed infusion to avoid skin rashes.[14]

Side effects

Pemetrexed, whether used alone or in combination with cisplatin, has these side effects:[15]

Trade names

In addition to the brand name Alimta, this drug is also marketed in India by Abbott Healthcare as Pleumet and by Cadila Healthcare as Pemecad.[citation needed]

References

  1. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ National Cancer Institute: FDA Approval for Pemetrexed Disodium
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Ettinger DS et al. NCCN Clinical Practice Guidelines in Oncology: Non-small Cell Lung Cancer V.2.2009 available from www.nccn.org
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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