Stemline Therapeutics Announces Three ELZONRIS™ (tagraxofusp; SL-401) Clinical Presentations, Including an Oral Presentation, at the EHA Congress

NEW YORK, June 14, 2018 (GLOBE NEWSWIRE) — Stemline Therapeutics, Inc. (Nasdaq:STML), a clinical-stage biopharmaceutical company developing novel oncology therapeutics, announced that ELZONRISTM (tagraxofusp; SL-401) will be the subject of three clinical presentations, including an oral presentation on the pivotal BPDCN program. Updated data from the ongoing Phase 2 trial in chronic myelomonocytic leukemia (CMML) and myelofibrosis (MF) will also be presented. Presentations will be delivered tomorrow, Friday, June 15th at the 23rd Congress of the European Hematology Association (EHA) in Stockholm, Sweden.

Details on the presentations are listed below. Presentations will be available on the Stemline website (www.stemline.com), Scientific Presentations tab, after their delivery.

Results of Pivotal Phase 2 Trial of SL-401 in Patients with Blastic Plasmacytoid Dendritic Cell Neoplasm

  • Abstract: S116
  • Session: Miscellaneous Treatments in AML
  • Presenter: Naveen Pemmaraju, MD; MD Anderson Cancer Center
  • Oral Presentation: Friday, June 15; 11:45 – 12:00 CEST (5:45 AM – 6:00 AM ET)
  • Location: Room A4

Results from Ongoing Phase 1/2 Trial of SL-401 in Patients with Intermediate or High Risk Relapsed/Refractory Myelofibrosis

  • Abstract: PF618
  • Session: Myeloproliferative neoplasms – Clinical
  • Poster Presentation: Friday, June 15; 17:30 – 19:00 CEST (11:30 AM – 1 PM ET)
  • Location: Poster Area

Results from Ongoing Phase 1/2 Trial of SL-401 in Patients with Relapsed/Refractory CMML

  • Abstract: PF626
  • Session: Myeloproliferative neoplasms – Clinical
  • Poster Presentation: Friday, June 15; 17:30 – 19:00 CEST (11:30 AM – 1 PM ET)
  • Location: Poster Area

About ELZONRISTM (tagraxofusp; SL-401)
ELZONRISTM (tagraxofusp; SL-401) is a novel targeted therapy directed to CD123, a cell surface receptor expressed on a range of malignancies. ELZONRIS has successfully completed a pivotal trial in blastic plasmacytoid dendritic cell neoplasm (BPDCN), an indication for which it was granted Breakthrough Therapy Designation (BTD). A rolling Biologics License Application (BLA) submission is underway. ELZONRIS is also being evaluated in additional clinical trials in other indications including chronic myelomonocytic leukemia (CMML), myelofibrosis (MF), and acute myeloid leukemia (AML).

About BPDCN
Please visit the BPDCN disease awareness website: www.bpdcninfo.com.

About Stemline Therapeutics
Stemline Therapeutics, Inc. is a clinical-stage biopharmaceutical company developing novel oncology therapeutics. Stemline is developing three clinical stage product candidates, ELZONRISTM (tagraxofusp; SL-401), SL-801, and SL-701. ELZONRIS is a targeted therapy directed to the interleukin-3 receptor (CD123) present on a range of malignancies. ELZONRIS has completed a pivotal trial in blastic plasmacytoid dendritic cell neoplasm (BPDCN), for which it was granted breakthrough therapy designation (BTD). The pivotal trial met its primary endpoint, and a rolling Biologics License Application (BLA) submission has been initiated. ELZONRIS is also being evaluated in clinical trials in additional indications including chronic myelomonocytic leukemia (CMML), myelofibrosis (MF), acute myeloid leukemia (AML), and myeloma. SL-801 is a novel oral small molecule reversible inhibitor of XPO1 that is currently in a Phase 1 trial of patients with advanced solid tumors; dose escalation is ongoing. SL-701, an immunotherapeutic, has completed a Phase 2 trial in patients with second-line glioblastoma; data and next steps for the program are being evaluated.

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 BLA submission to the FDA; 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 agree with our data, find our data supportive of approval, or 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 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 SEC. 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
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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