Plitidepsin

Plitidepsin, also known as dehydrodidemnin B and sold under the brand name Aplidin, is a chemical compound extracted from the ascidian Aplidium albicans.^[3]

Plitidepsin

Names
Systematic IUPAC name (2S)-N-[(1R)-1-({(3S,6R,7S,10R,11S,15S,17S,20S,25aS)-10-[(2S)-Butan-2-yl]-11-hydroxy-3-[(4-methoxyphenyl)methyl]-2,6,17-trimethyl-20-(2-methylpropyl)-1,4,8,13,16,18,21-heptaoxo-15-(propan-2-yl)docosahydro-15H-pyrrolo[2,1-d] [10,19,1,4,7,14]dioxatetraazacyclotricosin-7-yl}carbamoyl)-3-methylbutyl]-N-methyl-1-(2-oxopropanoyl)pyrrolidine-2-carboxamide
Other names Aplidine; Aplidin, dehydrodidemnin B; Aplidin; N-[1-(1,2-Dioxopropyl)-L-prolyl]didemnin A
Identifiers
CAS Number	137219-37-5
3D model (JSmol)	Interactive image
ChEBI	CHEBI:90205
ChEMBL	ChEMBL451930
ChemSpider	26001665
DrugBank	DB04977
KEGG	D11032
PubChem CID	9812534
UNII	Y76ID234HW
CompTox Dashboard (EPA)	DTXSID0040418
InChI InChI=1S/C59H91N7O14/c1-15-35(8)50-47(69)30-49(71)80-53(34(6)7)52(72)37(10)54(73)60-41(26-32(2)3)58(77)65-24-16-18-42(65)48(70)31-63(12)44(29-39-20-22-40(79-14)23-21-39)46(68)28-36(9)51(56(75)61-50)62-55(74)45(27-33(4)5)64(13)59(78)43-19-17-25-66(43)57(76)38(11)67/h20-23,32-37,41-45,47,50-51,53,69H,15-19,24-31H2,1-14H3,(H,60,73)(H,61,75)(H,62,74)/t35-,36-,37-,41-,42-,43-,44-,45+,47-,50+,51-,53-/m0/s1 Key: RZFJKZZAZSUBCF-VETSTYKFSA-N
SMILES O=C([C@@H](NC([C@@H](C)C([C@@H](OC(C[C@H](O)[C@H](NC([C@@H](NC([C@H](N(C([C@H]1N(C(C(C)=O)=O)CCC1)=O)C)CC(C)C)=O)[C@@H](C)OC([C@H](CC2=CC=C(OC)C=C2)N3C)=O)=O)[C@@H](C)CC)=O)C(C)C)=O)=O)CC(C)C)N4[C@H](C3=O)CCC4
Properties
Chemical formula	C57H87N7O15
Molar mass	1110.357 g·mol−1
Pharmacology
ATC code	L01XX57 (WHO)
Pregnancy category	AU: D[1][2]
Legal status	AU: S4 (Prescription only)[1][2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Medical uses

In Australia, plitidepsin, in combination with dexamethasone, is indicated for the treatment of people with relapsed and refractory multiple myeloma.^[1][2][4]

Pharmacological activity

Plitidepsin exhibits antitumor, antiviral and immunosuppressive activities. It shows promise in shrinking tumors in pancreatic, stomach, bladder, and prostate cancers.^[5][6]

Plitidepsin inhibits the human protein eEF1A which has potential interactions with multiple coronavirus proteins. Plitidepsin possesses antiviral activity against SARS-CoV-2 in vitro and in an in vivo mouse model.^[7]

Society and culture

Legal status

In July 2003, plitidepsin was granted orphan drug status by the European Medicines Agency (EMA) for treating acute lymphoblastic leukemia.^[8] In December 2017, the EMA's Committee for Medicinal Products for Human Use (CHMP) adopted a negative opinion, recommending the refusal of the marketing authorization for the treatment of multiple myeloma.^[9] After a re-examination of the opinion, the refusal of the marketing authorization was confirmed in March 2018.^[9] The CHMP is of the opinion that the benefits of Aplidin do not outweigh its risks.^[9] In October 2020, the General Court upheld PharmaMar's appeal and annulled the decision refusing marketing authorization for Aplidin, and the European Commission then returned the application for Aplidin to the EMA.^[9][10] In July 2025, PharmaMar withdrew its application for a marketing authorization of Aplidin for the treatment of multiple myeloma.^[9]

Plitidepsin was approved for medical used in Australia in December 2018.^[2]