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Lirum Therapeutics Presents Positive Data on LX-101, a Novel Clinical-Stage Targeted Therapy, Demonstrating Potent Preclinical Activity Against Pediatric Sarcomas 

New York, NY – October 31, 2023 – Lirum Therapeutics, Inc. (“Lirum”), an innovative clinical-stage biopharmaceutical company focused on the treatment of debilitating diseases, today announced the presentation of positive data at the 2023 Connective Tissue Oncology Society meeting in Dublin, Ireland. 

LX-101, a novel clinical-stage payload-bearing targeted therapy directed to the insulin-like growth factor 1 receptor (IGF-1R),demonstrated potent anti-tumor activity against cell lines with well-established IGF-1R pathway involvement, including pediatric sarcomas. These include cancers with known genetic alterations affecting the IGF-1R pathway and/or with high IGF-1R expression such as Ewing’s and related sarcomas, rhabdomyosarcoma, and osteosarcoma.  

LX-101 was active against a variety of pediatric cancer cell lines including Ewing’s sarcoma (with EWSR1-FLI1 and EWSR1-ERG gene fusions), alveolar rhabdomyosarcoma (with the PAX3-FOXO1 gene fusion), and osteosarcoma. The poster will be presented on November 2, 2023 at 5:30 PM IST (local time) and will be available on the Lirum website ( under the Investors and Media tab.


Given these promising results, and the existing clinical data, Lirum is planning new clinical trials with LX-101 in pediatric and adult oncologic indications that carry strong ties to the IGF-1/IGF-1R pathway. In parallel, Lirum is also planning to develop LX-101 in certain autoimmune diseases, such as thyroid eye disease (TED), where IGF-1R has been clinically and commercially validated. 


About LX-101 

Lirum’s lead product candidate, LX-101, is a novel, clinical-stage, next generation, precision-engineered, payload-bearing targeted therapy directed to the insulin-like growth factor 1 receptor (IGF-1R). The IGF-1/IGF-1R pathway has been implicated in a host of malignancies and autoimmune diseases, including thyroid eye disease (TED), and which Lirum believes represents a scientifically and medically rational target in both oncology and autoimmune indications. LX-101 consists of a proprietary, engineered variant of the IGF-1 ligand, conjugated to a cytotoxic payload, methotrexate, and harbors a novel and differentiated mechanism of action versus current and past IGF-1R targeted approaches. 

LX-101 (formerly 765IGF-MTX) has been evaluated in Phase 1 clinical trials of patients with advanced, pretreated solid and hematologic cancers. It was found to be well-tolerated and demonstrated single agent activity. No dose limiting toxicity or maximum tolerated dose were reached, and Lirum intends to explore further dose escalation and schedule optimization as well as focus on those indications with strong ties to the IGF-1/IGF-1R pathway. 


About Lirum Therapeutics, Inc.

Lirum is an innovative clinical-stage biopharmaceutical company focused on the treatment of debilitating diseases through the acquisition, development and commercialization of novel drug candidates with compelling mechanisms of action, regulatory pathways and commercial opportunities. Lirum’s lead candidate, LX-101, is a novel clinical-stage targeted therapy directed to the insulin-like growth factor 1 receptor (IGF-1R) with a differentiated mechanism of action. Lirum is developing LX-101 in oncology and autoimmune indications, including thyroid eye disease (TED). For more information on Lirum, please visit

Forward Looking Statements

This press release contains certain “forward-looking statements” within the meaning of the “safe harbor” provisions of the US Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as: “target,” “believe,” “expect,” “will,” “may,” “anticipate,” “estimate,” “would,” “positioned,” “future,” and other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on Lirum’s current beliefs, expectations and assumptions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Actual results and outcomes may differ materially from those indicated in the forward-looking statements. Therefore, you should not rely on any of these forward-looking statements. Important factors that could cause actual results and outcomes to differ materially from those indicated in the forward-looking statements include, among others, the following: (1) the ability of Lirum to successfully develop its product candidates, including obtaining positive results from planned clinical trials; (2) expectations for the clinical development, manufacturing, regulatory approval and commercialization of our product candidates or other products we may acquire or in-license; (3) expectations for incurring capital expenditures and generating revenue; (4) estimates of the sufficiency of our existing cash and cash equivalents and investments to finance operations; (5) changes in applicable laws or regulations; (6) the possibility that Lirum may be adversely affected by other economic, business, and/or competitive factors; (7) the impact of health epidemics, including the COVID-19 pandemic, on Lirum’s business and the actions Lirum may take in response thereto; and (8) other risks and uncertainties indicated from time to time. There may be additional risks that Lirum considers immaterial or which are unknown. Any forward-looking statement made by us in this press release is based only on information currently available to Lirum and speaks only as of the date on which it is made. Lirum undertakes no obligation to publicly update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise, except as required by law. Also, the information found on our website is not incorporated by reference into this press release and is included for reference purposes only.

Company Contact:


Matt Hoberman

Investor Relations

Phone: (646) 389-6015


Lirum Therapeutics, Inc.

590 Madison Avenue 21st Floor

New York, NY 10022

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