Aptose to Present New CG’806 and APTO-253 Data at the 2018 AACR Annual Meeting

On March 15, 2018 Aptose Biosciences Inc. ("Aptose" or the "Company") (NASDAQ:APTO) (TSX:APS), a clinical-stage company developing highly differentiated therapeutics targeting the underlying mechanisms of cancer, reported that preclinical data for CG’806, its pan-FLT3/pan-BTK inhibitor, and APTO-253, its c-Myc inhibitor, will be presented in three separate posters at the 2018 AACR (Free AACR Whitepaper) Annual Meeting in Chicago, Il (Press release, Aptose Biosciences, MAR 15, 2018, View Source;p=RssLanding&cat=news&id=2338208 [SID1234524790]).

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CG’806 Poster Presentation Details

CG’806, a first-in-class pan-FLT3/pan-BTK inhibitor, demonstrates superiority to other FLT3 and BTK inhibitors against primary patient samples
Date & Time: Sunday, April 15, 2018, 1:00 p.m. – 5:00 p.m.
Session Category: Experimental and Molecular Therapeutics
Session Title: Experimental Agents and Combinations for Hematologic Malignancies 1
Abstract Number: 4316
Location: McCormick Place South, Exhibit Hall A, Poster Section 37

CG’806, a first-in-class pan-FLT3/pan-BTK inhibitor, targets multiple pathways to kill diverse subtypes of acute myeloid leukemia and Bcell malignancy in vitro
Date & Time: Sunday, April 15, 2018, 1:00 p.m. – 5:00 p.m.
Session Title: Experimental Agents and Combinations for Hematologic Malignancies 1
Abstract Number: 4239
Location: McCormick Place South, Exhibit Hall A, Poster Section 37

APTO-253 Poster Presentation Details

APTO-253 is a new addition to the repertoire of drugs that can exploit DNA BRCA1/2 deficiency
Date & Time: Tuesday, April 17, 2018, 1:00 p.m. – 5:00 p.m.
Session Title: DNA Damage and Cell Cycle Regulation Experimental Therapeutics
Abstract Number: 2138
Location: McCormick Place South, Exhibit Hall A, Poster Section 38

All abstracts will be available on the AACR (Free AACR Whitepaper) website, www.aacr.org, and published in the 2018 Proceedings of the AACR (Free AACR Whitepaper).

About CG’806
CG‘806 is an oral, first-in-class pan-FLT3/pan-BTK multi-kinase inhibitor. This small molecule demonstrates potent inhibition of wild type and mutant forms of FLT3 (including internal tandem duplication, or ITD, and mutations of the receptor tyrosine kinase domain and gatekeeper region), eliminates acute myeloid leukemia (AML) tumors in the absence of toxicity in murine xenograft models, and represents a potential best-in-class therapeutic for patients with AML. Likewise, CG’806 demonstrates potent, non-covalent inhibition of the wild type and Cys481Ser mutant forms of the BTK enzyme, as well as other oncogenic kinase pathways operative in B cell malignancies, suggesting CG’806 may be developed for various B cell malignancy patients (including CLL, MCL, DLBCL and others) that are resistant/refractory/intolerant to covalent BTK inhibitors. CG’806 is currently in pre-clinical development in partnership with CrystalGenomics.

About APTO-253
APTO-253 is a clinical-stage small molecule targeted therapeutic agent that inhibits expression of the c-Myc oncogene, leading to cell cycle arrest and programmed cell death (apoptosis) in human-derived solid tumor and hematologic cancer cells, without causing general myelosuppression of the healthy bone marrow. The c-Myc oncogene is overexpressed in hematologic cancers, including acute myeloid leukemia (AML). Aptose researchers have reported the ability of APTO-253 to induce cell death, or apoptosis, in multiple blood cancer cell lines including AML, as well as in vitro synergy with various classes of conventional approved and investigational therapies for AML or myelodysplastic syndromes (MDS).