Oblimersen
Clinical data
Trade namesGenasense
Other namesG3139
ATC code
Legal status
Legal status
  • Not marketed
Identifiers
CAS Number
PubChem CID
ChemSpider
UNII
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC172H221N62O91P17S17
Molar mass5684.58 g·mol−1
3D model (JSmol)
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  • InChI=1S/C172H221N62O91P17S17/c1-69-39-225(169(253)213-149(69)237)117-21-73(236)92(292-117)44-274-326(257,343)320-85-33-129(229-63-191-135-141(181)187-61-189-143(135)229)303-103(85)55-285-332(263,349)314-79-27-122(221-17-9-113(177)201-165(221)249)295-95(79)47-278-330(261,347)312-78-26-121(220-16-8-112(176)200-164(220)248)298-98(78)50-280-338(269,355)322-87-35-131(231-65-193-137-145(231)205-157(183)209-153(137)241)305-105(87)57-287-334(265,351)316-81-29-124(223-19-11-115(179)203-167(223)251)299-99(81)51-281-339(270,356)323-88-36-132(232-66-194-138-146(232)206-158(184)210-154(138)242)307-107(88)59-289-337(268,354)319-84-32-128(228-42-72(4)152(240)216-172(228)256)302-102(84)54-284-341(272,358)325-90-38-134(234-68-196-140-148(234)208-160(186)212-156(140)244)306-106(90)58-288-335(266,352)317-82-30-125(224-20-12-116(180)204-168(224)252)300-100(82)52-282-340(271,357)324-89-37-133(233-67-195-139-147(233)207-159(185)211-155(139)243)308-108(89)60-290-342(273,359)321-86-34-130(230-64-192-136-142(182)188-62-190-144(136)230)304-104(86)56-286-333(264,350)315-80-28-123(222-18-10-114(178)202-166(222)250)296-96(80)48-277-328(259,345)310-76-24-119(218-14-6-110(174)198-162(218)246)294-94(76)46-276-329(260,346)311-77-25-120(219-15-7-111(175)199-163(219)247)297-97(77)49-279-336(267,353)318-83-31-127(227-41-71(3)151(239)215-171(227)255)301-101(83)53-283-331(262,348)313-75-23-118(217-13-5-109(173)197-161(217)245)293-93(75)45-275-327(258,344)309-74-22-126(291-91(74)43-235)226-40-70(2)150(238)214-170(226)254/h5-20,39-42,61-68,73-108,117-134,235-236H,21-38,43-60H2,1-4H3,(H,257,343)(H,258,344)(H,259,345)(H,260,346)(H,261,347)(H,262,348)(H,263,349)(H,264,350)(H,265,351)(H,266,352)(H,267,353)(H,268,354)(H,269,355)(H,270,356)(H,271,357)(H,272,358)(H,273,359)(H2,173,197,245)(H2,174,198,246)(H2,175,199,247)(H2,176,200,248)(H2,177,201,249)(H2,178,202,250)(H2,179,203,251)(H2,180,204,252)(H2,181,187,189)(H2,182,188,190)(H,213,237,253)(H,214,238,254)(H,215,239,255)(H,216,240,256)(H3,183,205,209,241)(H3,184,206,210,242)(H3,185,207,211,243)(H3,186,208,212,244)/t73-,74-,75-,76-,77-,78-,79-,80-,81-,82-,83-,84-,85-,86-,87-,88-,89-,90-,91+,92+,93+,94+,95+,96+,97+,98+,99+,100+,101+,102+,103+,104+,105+,106+,107+,108+,117+,118+,119+,120+,121+,122+,123+,124+,125+,126+,127+,128+,129+,130+,131+,132+,133+,134+,326?,327?,328?,329?,330?,331?,332?,333?,334?,335?,336?,337?,338?,339?,340?,341?,342?/m0/s1 ☒N
  • Key:MIMNFCVQODTQDP-NDLVEFNKSA-N ☒N
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Oblimersen (INN, trade name Genasense; also known as Augmerosen and bcl-2 antisense oligodeoxynucleotide G3139) is an antisense oligodeoxyribonucleotide being studied as a possible treatment for several types of cancer, including chronic lymphocytic leukemia, B-cell lymphoma, and breast cancer. It may kill cancer cells by blocking the production of Bcl-2—a protein that makes cancer cells live longer—and by making them more sensitive to chemotherapy.

History

The antisense oligonucleotide drug oblimersen was developed by Genta Incorporated to target Bcl-2. An antisense DNA or RNA strand is non-coding and complementary to the coding strand (which is the template for producing respectively RNA or protein). An antisense drug is a short sequence of RNA which hybridises with and inactivates mRNA, preventing the protein from being formed.[citation needed]

It was shown that the proliferation of human lymphoma cells (with t(14;18) translocation) could be inhibited by antisense RNA targeted at the start codon region of Bcl-2 mRNA. In vitro studies led to the identification of oblimersen, which is complementary to the first 6 codons of Bcl-2 mRNA.[1]

These have shown successful results in Phase I/II trials for lymphoma, and a large Phase III trial was launched in 2004.[2]

By the first quarter 2010, the drug had not received FDA approval due to disappointing results in a melanoma trial. Although its safety and efficacy have not been established for any use, Genta Incorporated still[when?] claims on its website that studies are currently under way to examine the potential role of oblimersen in a variety of clinical indications.

References

  1. ^ Dias N, Stein CA (November 2002). "Potential roles of antisense oligonucleotides in cancer therapy. The example of Bcl-2 antisense oligonucleotides". European Journal of Pharmaceutics and Biopharmaceutics. 54 (3): 263–9. doi:10.1016/S0939-6411(02)00060-7. PMID 12445555.
  2. ^ Mavromatis BH, Cheson BD (June 2004). "Novel therapies for chronic lymphocytic leukemia". Blood Reviews. 18 (2): 137–48. doi:10.1016/S0268-960X(03)00039-0. PMID 15010151.

External links

Intracellular chemotherapeutic agents / antineoplastic agents (L01)
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