MethylGene to Present MGCD265 Data at the 2012 American Society of Clinical Oncology Annual Meeting

Montreal, Canada. May 29, 2012 – MethylGene Inc. (TSX:MYG) today announced that clinical data for its Met/VEGF-R kinase inhibitor, MGCD265, will be presented at the 2012 ASCO Annual Meeting to be held in Chicago, Illinois from June 1 to 5, 2012. This poster presentation will highlight the safety profile of MGCD265 when used as a monotherapy in this ongoing dose-escalation study.

Poster Presentation

MGCD265, a multitargeted oral tyrosine kinase receptor inhibitor of Met and VEGFR: Dose-escalation Phase I study.

Date and Time: Monday June 4, 8:00 AM to 12:00 PM (CT)

Session: Developmental Therapeutics - Experimental Therapeutics

Abstract No.: 3039

Location: S Hall A2

About MGCD265

MGCD265 is a novel, oral small molecule inhibitor that targets a unique spectrum of receptor tyrosine kinases: Met, VEGFR 1, 2, and 3, Tie-2 and Ron. These kinases play key roles in tumor development, survival and metastasis as well as the inappropriate formation of blood vessels (angiogenesis) that nourish the tumor. MGCD265 has completed one Phase 1 single agent study, and is nearing completion of one Phase 1 single agent clinical trial and one Phase 1/2 combination clinical trial (with erlotinib and docetaxel) in solid tumors.

About MethylGene

MethylGene Inc. (TSX:MYG) is a small molecule drug development company that is advancing two novel therapeutics for cancer and infectious disease in human clinical trials. The Company’s lead product candidates are: MGCD290, an oral antifungal agent targeting the fungal Hos2 enzyme that is currently in Phase 2 trials for vulvovaginal candidiasis, and MGCD265, an oral Met/VEGF receptor kinase inhibitor that is in Phase 1/2 clinical trials for solid tumor cancers. MethylGene owns all rights to its lead product candidates, and has partnerships with Otsuka Pharmaceutical Co. Ltd., Taiho Pharmaceutical Co. Ltd., and EnVivo Pharmaceuticals, Inc. for its other pipeline programs.

Investor Relations Contact:

Joseph Walewicz, CFA

Vice President, Business & Corporate Development

MethylGene Inc.

Phone: 514-337-3333 ext. 373

ir@methylgene.com

www.methylgene.com

Thomas Fechtner

Vice President

The Trout Group LLC

Phone: 646-378-2931

tfechtner@troutgroup.com

www.troutgroup.com

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