Curis Provides Updated Data from its Frontline AML Triplet Study

5 of 8 patients (62.5%) achieved Undetectable MRD (uMRD)

LEXINGTON, Mass., Dec. 9, 2025 /PRNewswire/ -- Curis, Inc. (NASDAQ: CRIS), a biotechnology company focused on the development of emavusertib (CA-4948), an orally available, small molecule IRAK4 and FLT3 inhibitor, yesterday provided updated clinical data from the ongoing frontline Acute Myeloid Leukemia (AML) triplet study (CA-4948-104) in a poster presentation at the 67th ASH Annual Meeting (ASH).

The AML triplet study is evaluating the addition of emavusertib (ema) to the combination of venetoclax and azacitidine (ven-aza) in AML patients who have achieved complete remission on ven-aza but remain MRD-positive (MRD+), with the goal of enabling patients to achieve uMRD. The first two cohorts in the study evaluate patients who received emavusertib for either 7 or 14 days in a 28-day cycle, in addition to their ven-aza treatment regimen.

In the ASH abstract, the company reported initial data showing 4 of 8 patients (50%) had achieved uMRD as of July 2, 2025. These data were updated in the poster presented at ASH with 5 of 8 patients (62.5%) achieving uMRD, with no change in safety profile, as of October 12, 2025.

"These data are very promising and warrant further evaluation of additional triplet (ema/ven/aza) regimens to determine the optimal dose and schedule for safety and efficacy to improve patient outcomes in a difficult to treat population," said James Dentzer, Curis's Chief Executive Officer.  

About Curis, Inc.
Curis is a biotechnology company focused on the development of emavusertib, an orally available, small molecule IRAK4 and FLT3 inhibitor. Emavusertib is currently being evaluated in the TakeAim Lymphoma Phase 1/2 study (CA-4948-101) of emavusertib in combination with the BTK inhibitor ibrutinib in patients with relapsed/refractory primary central nervous system lymphoma (PCNSL), in the TakeAim Leukemia Phase 1/2 study (CA-4948-102) of emavusertib monotherapy in patients with relapsed/refractory acute myeloid leukemia (AML) and relapsed/refractory high risk myelodysplastic syndrome (hrMDS), and in a Phase 1 study (CA-4948-104) that adds emavusertib to the combination with venetoclax and azacitidine (ema-ven-aza) in AML patients being treated with ven-aza in the frontline setting who have achieved CR but remain MRD-positive. Emavusertib has received Orphan Drug Designation from the U.S. Food and Drug Administration for the treatment of PCNSL, AML and MDS and from the European Commission for the treatment of PCNSL. Curis, through its 2015 collaboration with Aurigene Discovery Technologies Limited, has the exclusive license to emavusertib (CA-4948). For more information, visit Curis's website at www.curis.com.

Cautionary Note Regarding Forward-Looking Statements:

This press release contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, including, without limitation, statements concerning Curis's expectations with respect to statements regarding data from the AML triplet study.  Forward-looking statements may contain the words "believes," "expects," "anticipates," "plans," "intends," "seeks," "estimates," "assumes," "predicts," "projects," "targets," "will," "may," "would," "could," "should," "likelihood", "continue," "potential," "opportunity," "focus," "strategy," "mission," or similar expressions. These forward-looking statements are not guarantees of future performance and involve risks, uncertainties, assumptions and other important factors that may cause actual results to be materially different from those indicated by such forward-looking statements. Curis may experience adverse results, delays and/or failures in its drug development programs and may not be able to successfully advance the development of its drug candidates in the time frames it projects, if at all. Curis's drug candidates may cause unexpected toxicities, fail to demonstrate sufficient safety and efficacy in clinical studies and/or may never achieve the requisite regulatory approvals needed for commercialization. Favorable results seen in preclinical studies and early clinical trials of Curis's drug candidates may not be replicated in later trials. Curis is dependent on the success of emavusertib and any delays in the development of emavusertib could have a material adverse effect on its business. There can be no guarantee that the collaboration agreement with Aurigene will continue for its full term, or the CRADA with NCI will be extended, that Curis or its collaborators will each maintain the financial and other resources necessary to continue financing its portion of the research, development and commercialization costs, or that the parties will successfully discover, develop or commercialize drug candidates under the collaboration. Curis will require substantial additional capital to fund its business. Based on its available cash resources, it does not have sufficient cash on hand to support current operations within the next 12 months from the date of this press release. Curis will require substantial additional funding in the immediate term to fund the development of emavusertib through regulatory approval and commercialization, and to support its continued operations. If it is not able to obtain sufficient funding, it will be forced to delay, reduce in scope or eliminate the development emavusertib, including related clinical trials and operating expenses, potentially delaying the time to market for, or preventing the marketing of, emavusertib, which could adversely affect its business prospects and its ability to continue operations, and would have a negative impact on its financial condition and its ability to pursue its business strategies. Curis faces substantial competition. Curis and its collaborators face the risk of potential adverse decisions made by the FDA, EMA and other regulatory authorities, investigational review boards, and publication review bodies. Curis may not obtain or maintain necessary patent protection and could become involved in expensive and time-consuming patent litigation and interference proceedings. Unstable market and economic conditions, natural disasters, public health crises, political crises and other events outside of Curis's control, including its ability to regain and maintain its listing on the Nasdaq Capital Market, could significantly disrupt its operations or the operations of third parties on which Curis depends and could adversely impact Curis's operating results and its ability to raise capital. Other important factors that may cause or contribute to actual results being materially different from those indicated by forward-looking statements include the factors set forth under the captions "Risk Factor Summary" and "Risk Factors" in our most Form 10-Q and Form 10-K, and the factors that are discussed in other filings that we periodically make with the Securities and Exchange Commission. In addition, any forward-looking statements represent the views of Curis only as of today and should not be relied upon as representing Curis's views as of any subsequent date. Curis disclaims any intention or obligation to update any of the forward-looking statements after the date of this press release whether as a result of new information, future events or otherwise, except as may be required by law.

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SOURCE Curis, Inc.