Stemline Therapeutics to Present SL-801 Phase 1 Data at Upcoming ESMO Congress

NEW YORK, Aug. 30, 2017 (GLOBE NEWSWIRE) — Stemline Therapeutics, Inc. (Nasdaq:STML), a clinical-stage biopharmaceutical company developing novel therapeutics for difficult to treat cancers, announced today that data from SL-801’s ongoing Phase 1 trial in patients with advanced solid tumors has been selected by the European Society of Medical Oncology (ESMO) for poster presentation at their Annual Congress 2017, to be held September 8-12, 2017 in Madrid, Spain. SL-801 is a novel, potent and reversible Exportin-1 (XPO1) inhibitor.

Details on the presentation are as follows:

Title:     Ongoing Phase 1 Trial of SL-801, a Novel XPO-1 Inhibitor, in Patients with Advanced Solid Tumors; Interim Results
First Author:     Judy Wang, MD; Florida Cancer Specialists & Research Institute
Abstract:     406P

Date/Time:     Monday, September 11, 2017 – 1:15-2:15 PM CET
Location:     Hall 8
       

About Stemline Therapeutics 
Stemline Therapeutics, Inc. is a clinical stage biopharmaceutical company developing novel therapeutics for difficult to treat cancers. SL-401 was granted Breakthrough Therapy Designation (BTD) for the treatment of patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN). SL-401 is a targeted therapy directed to the interleukin-3 receptor (CD123), a cell surface receptor overexpressed on BPDCN and a variety of other malignancies. A pivotal Phase 2 trial with SL-401 in BPDCN has completed enrollment in Stages 1, 2 and 3 of the trial. An additional cohort, Stage 4, is currently enrolling BPDCN patients to ensure ongoing access to SL-401. Additional Phase 1/2 trials with SL-401, as a single agent or in combination with other agents, are ongoing in patients with other malignancies including myeloproliferative neoplasms (MPN) (focused on chronic myelomonocytic leukemia [CMML] and myelofibrosis [MF]), acute myeloid leukemia (AML), and multiple myeloma. A Phase 1 trial of SL-801, a novel oral small molecule reversible XPO1 inhibitor, is enrolling patients with advanced solid tumors. A Phase 2 trial of SL-701, an immunotherapeutic, has completed dosing of patients with second-line glioblastoma and patients are being followed for outcomes including survival.

Forward-Looking Statements
Some of the statements included in this press release may be forward-looking statements that involve a number of risks and uncertainties. For those statements, we claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. The factors that could cause our actual results to differ materially include: the success and timing of our clinical trials and preclinical studies for our product candidates, including site initiation, institutional review board approval, scientific review committee approval, patient accrual, safety, tolerability and efficacy data observed, and input from regulatory authorities including the risk that the FDA or other ex-U.S. national drug authority ultimately does not approve any of our product candidates; our plans to develop and commercialize our product candidates; market acceptance of our products; reimbursement available for our products; our available cash and investments; our ability to obtain and maintain intellectual property protection for our product candidates; our ability to manufacture; the performance of third-party manufacturers, clinical research organizations, clinical trial sponsors and clinical trial investigators; and other risk factors identified from time to time in our reports filed with the Securities and Exchange Commission. Any forward-looking statements set forth in this press release speak only as of the date of this press release. We do not intend to update any of these forward-looking statements to reflect events or circumstances that occur after the date hereof.

CONTACT: Contact
Investor Relations
Stemline Therapeutics, Inc.
750 Lexington Avenue
Eleventh Floor
New York, NY 10022
Tel: 646-502-2307
Email: investorrelations@stemline.com

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