Temozolomide

▎药明康德内容团队编辑   胶质母细胞瘤（GBM）是一种极具侵袭性的恶性脑部肿瘤，治疗难度大，复发率高，患者的中位生存期仅有约15个月。由于超过60%的GBM患者表达TP53野生型基因，因此科学家将目光聚焦于TP53相关通路的调控。 TP53编码的p53蛋白在DNA损伤时能诱导细胞周期停滞和凋亡，具有抑制肿瘤生长的作用。然而，MDM2蛋白会阻断p53的抗肿瘤作用。因此，抑制MDM2有望恢复p53的肿瘤抑制功能，从而对抗GBM的发展。navtemadlin（KRT-232）就是一种MDM2抑制剂，临床前研究已经显示，其对于TP53野生型GBM具有潜在的治疗作用。 近日，一项发表于《科学-转化医学》的研究报告了一项利用navtemadlin治疗TP53野生型复发性GBM的“机会窗口”（window-of-opportunity）临床试验结果，展示了navtemadlin在激活p53信号通路、诱导肿瘤细胞死亡方面的潜力。尽管navtemadlin单药未能显著延长患者生存期，但其与化疗药物替莫唑胺（temozolomide）的联合疗法有望带来更持久的生存获益。 在这项研究中，21名TP53野生型GBM患者在手术前接受了为期2天的navtemadlin治疗，每日剂量分别为120毫克（低剂量组）或240毫克（高剂量组）。在术后恢复后，患者继续接受navtemadlin治疗，直至病情进展或出现不可接受的毒性。 结果显示，两种剂量均达到了药效学效果，但患者的中位无进展生存期为3.1个月，没有得到显著延长。不过，navtemadlin确实激活了p53并且影响了肿瘤中的基因表达。 ▲胶质母细胞瘤载切片（图片来源：参考资料[1]） 通过对复发肿瘤的DNA测序，研究人员意外地发现，肿瘤并未出现TP53失活突变，这意味着耐药机制可能涉及其他途径。 为了进一步探索navtemadlin的疗效和耐药机制，研究团队对患者来源的GBM神经球模型开展了分析，发现navtemadlin单药治疗仅能诱导部分肿瘤细胞死亡，但与化疗药物替莫唑胺（temozolomide）联合使用时，能够显著增强肿瘤细胞的凋亡，同时不损伤正常的骨髓细胞。因此，navtemadlin与替莫唑胺联合使用，可能为GBM患者带来更持久的生存获益。 研究还发现，navtemadlin治疗上调了少突胶质细胞分化相关基因的表达，并且在复发肿瘤中，细胞富集少突胶质细胞转录因子2（OLIG2）。这一现象提示，少突胶质细胞分化可能是GBM对navtemadlin产生耐药性的一种新机制。这一发现也为克服治疗耐药性的进一步研究提供了新方向。 参考资料： [1] Veronica Rendo et al. A window-of-opportunity trial reveals mechanisms of response and resistance to navtemadlin in patients with recurrent glioblastoma. Science Translational Medicine (2025). DOI: 10.1126/scitranslmed.adn6274 本文来自药明康德内容微信团队，欢迎转发到朋友圈，谢绝转载到其他平台。如有开设白名单需求，请在“学术经纬”公众号主页回复“转载”获取转载须知。其他合作需求，请联系wuxi_media@wuxiapptec.com。 免责声明：药明康德内容团队专注介绍全球生物医药健康研究进展。本文仅作信息交流之目的，文中观点不代表药明康德立场，亦不代表药明康德支持或反对文中观点。本文也不是治疗方案推荐。如需获得治疗方案指导，请前往正规医院就诊。 更多推荐 点个“在看”再走吧~

Promising preliminary Phase 2b (ASCEND) pancreatic cancer data (Cohort A) reported with Cohort B data anticipated in the coming months Enrollment completed in Qilu’s Phase 2 trial evaluating certepetide for the treatment of first-line mPDAC Advancing development portfolio with multiple milestones projected over the next 12+ months Cash runway extending into the second quarter of 2026 with no debt Conference call scheduled for today at 4:30 p.m. Eastern Time BASKING RIDGE, N.J., Feb. 27, 2025 (GLOBE NEWSWIRE) -- Lisata Therapeutics, Inc. (Nasdaq: LSTA) (“Lisata” or the “Company”), a clinical-stage pharmaceutical company developing innovative therapies for the treatment of advanced solid tumors and other serious diseases, provides a business update and reports financial results for the twelve months ended December 31, 2024. “Throughout 2024 and now into early 2025, we continue to advance our development portfolio centered around our novel product candidate, certepetide,” stated David J. Mazzo, Ph.D., President and Chief Executive Officer of Lisata. “Following the encouraging preliminary results from the ASCEND and iLSTA trials reported at this year’s ASCO-GI Symposium, we remain committed to exploring the broad application of certepetide’s unique mechanism of action. Our development portfolio encompasses multiple clinical and preclinical trials evaluating certepetide for the treatment of various solid tumors, including pancreatic cancer, cholangiocarcinoma, glioblastoma, colon cancer, appendiceal cancer, and melanoma. In addition, we are exploring certepetide’s versatility in non-cancerous settings such as endometriosis. For Lisata, we expect 2025 to be a data-rich year and we look forward to sharing key developments as they become available.” Development Portfolio Highlights Certepetide as a treatment for solid tumors in combination with other anti-cancer agents Certepetide (formerly LSTA1) is an internalizing RGD, or iRGD, (arginylglycylaspartic acid) cyclic peptide designed to selectively activate the C-end rule active transport mechanism in a tumor specific manner, resulting in systemically co-administered anti-cancer agents more efficiently penetrating and accumulating in the tumor. Additionally, certepetide has been shown to modify the tumor microenvironment, diminishing its immunosuppressive nature, enhancing cytotoxic T cell concentration and inhibiting the metastatic cascade. Lisata and its collaborators have amassed significant non-clinical data demonstrating enhanced delivery of various existing and emerging anti-cancer therapies, including chemotherapies, immunotherapies, and RNA-based therapeutics. To date, certepetide has also demonstrated favorable safety, tolerability, and clinical activity in completed and ongoing clinical trials designed to demonstrate its ability to enhance the effectiveness of standard-of-care (SoC) chemotherapy for pancreatic cancer as well as the combination of chemotherapy and immunotherapy in a variety of solid tumors. Certepetide has been awarded Fast Track designation (U.S.) and Orphan Drug Designation for pancreatic cancer (U.S. and E.U.) as well as Orphan Drug Designation for glioma, osteosarcoma, and cholangiocarcinoma (U.S.). Additionally, certepetide has received Rare Pediatric Disease Designation for osteosarcoma (U.S.). Currently, certepetide is the subject of multiple ongoing or planned clinical studies being conducted globally across several solid tumor types in combination with a variety of anti-cancer regimens, including: ASCEND: Phase 2b double-blind, randomized (2:1 ratio), placebo-controlled trial evaluating two dosing regimens of certepetide in combination with SoC chemotherapy (gemcitabine/nab-paclitaxel) in patients with previously untreated metastatic pancreatic ductal adenocarcinoma (mPDAC). The trial is being conducted across 25 sites in Australia and New Zealand led by the Australasian Gastro-Intestinal Trials Group (AGITG) and coordinated by the National Health and Medical Research Council Clinical Trial Centre at the University of Sydney. Cohort A, with 95 patients receiving a single intravenous (IV) dose of certepetide 3.2 mg/kg or placebo in combination with SoC, completed enrollment in the third quarter of 2023. Preliminary Cohort A data presented at the 2025 ASCO-GI Symposium showed a positive trend in overall survival, including four complete responses in the certepetide-treated group compared to none in the placebo treated group. Data from Cohort B, with 63 patients receiving two IV doses of certepetide 3.2 mg/kg or placebo administered 4 hours apart in combination with SoC, is expected in the coming months with a final analysis of both cohorts available thereafter. The exact timing is dependent on accumulating the requisite number of endpoint events in Cohort B and is not something that can be accurately predicted. BOLSTER: Phase 2a double-blind, placebo-controlled, multi-center, randomized trial in the U.S. evaluating certepetide in combination with SoC chemotherapy in first- and second-line cholangiocarcinoma (CCA). The Company achieved complete enrollment in first-line CCA nearly six months ahead of plan, accelerating anticipated topline data readout to mid-2025. Based on this rapid enrollment rate and the pressing need to improve treatment outcomes in patients that have progressed after first-line CCA treatment, a second cohort has been added to the BOLSTER trial evaluating certepetide in combination with SoC in subjects with second-line CCA. In September 2024, Lisata announced first patient treated in the second-line CCA cohort, with enrollment completion targeted for later this year. CENDIFOX: Phase 1b/2a open-label trial in the U.S. evaluating certepetide in combination with neoadjuvant FOLFIRINOX based therapies in pancreatic, colon and appendiceal cancers. In December 2024, the Company announced enrollment completion in all three cohorts. The single-center study, conducted solely at the University of Kansas Cancer Center, was designed with a 3-cycle run-in period to ensure patients met specific criteria before receiving treatment. Of the 66 patients enrolled, 50 patients met the criteria and were treated with certepetide across three cohorts, including 24 with resectable or borderline resectable pancreatic cancer, 15 with high-grade colon or appendiceal cancer and peritoneal metastasis, and 11 with oligometastatic colon cancer. The trial will provide Lisata with valuable pre- and post-treatment tumor tissue data for immune profiling, along with long-term patient outcome information. CENDIFOX data are expected in the coming months; however, given this is an investigator-initiated study, the exact timing is not in Lisata’s control. The trial is funded by the University of Kansas Cancer Center and Lisata is supplying certepetide. Qilu Pharmaceutical, the licensee of certepetide in the Greater China territory, is currently evaluating certepetide in combination with gemcitabine and nab-paclitaxel as a treatment for first-line mPDAC. During the 2023 ASCO Annual Meeting, Qilu Pharmaceutical presented an abstract sharing preliminary data from the study which corroborated previously reported findings from the Phase 1b/2a trial of certepetide plus gemcitabine and nab-paclitaxel conducted in Australia in patients with first-line mPDAC. Qilu has completed enrollment in its Phase 2 trial and data are expected in the coming months. iLSTA: Phase 1b/2a randomized, single-blind, single-center, safety and pharmacodynamic trial in Australia, funded by WARPNINE Inc., is evaluating certepetide in combination with SoC chemotherapy (nab-paclitaxel and gemcitabine) plus SoC immunotherapy (durvalumab) versus SoC alone in patients with locally advanced non-resectable PDAC. An interim analysis of the iLSTA trial, presented at the 2025 ASCO GI Symposium, showed preliminary results from the first 17 of the 30 targeted patients, corroborating preclinical data that certepetide enhances the effectiveness of immunotherapy. With 27 of the 30 patients enrolled, enrollment remains on track to be completed by the first half of 2025. A Lisata-funded Phase 2a, double-blind, placebo-controlled, randomized, proof-of-concept study evaluating certepetide in combination with SoC temozolomide versus temozolomide alone in patients with newly diagnosed glioblastoma multiforme (GBM) is being conducted across multiple sites in Estonia and Latvia and is planned to also include a site in Lithuania. The study is targeted to enroll 30 patients with a randomization of 2:1 in favor of the certepetide treatment group. Enrollment completion is targeted for the second half of 2025. FORTIFIDE: Phase 1b/2a, double-blind, placebo-controlled, three-arm, randomized study in the U.S. evaluating the safety, tolerability, and efficacy of a 4-hour continuous infusion of certepetide in combination with SoC in subjects with first-line mPDAC. As part of this study, Lisata has engaged Haystack Oncology to use its MRD™ technology to measure circulating tumor DNA levels at multiple timepoints in patients throughout the study as an exploratory endpoint for analyzing the early therapeutic effect of certepetide. The Company expects to enroll the first patient in the study in the first half of 2025. However, in parallel, management is investigating a potentially faster and more cost-effective approach to achieving the study objective, which may become the preferred strategy. Lisata has entered into multiple research collaborations, including a sponsored research agreement with the University of Cincinnati to assess certepetide in combination with bevacizumab (a VEGF inhibitor) in a preclinical murine model for the treatment of endometriosis. Lisata is also partnering with Valo Therapeutics (ValoTx) to investigate the benefits of combining certepetide with ValoTx's platform technology, PeptiCRAd, an oncolytic virus, and a checkpoint inhibitor in a preclinical murine model for the treatment of melanoma. In November 2024, Lisata entered into an Exclusive License and Collaboration Agreement with Kuva Labs, Inc. (“Kuva”), in which Lisata granted Kuva an exclusive license to explore the synergistic potential of certepetide as a targeting and delivery agent for Kuva’s NanoMark™ imaging technology in solid tumors. Under the agreement, Kuva will assume full responsibility for research, development, and commercialization costs, while Lisata will be responsible for supplying certepetide pursuant to a Clinical Supply Agreement. As consideration for the license, the Company is to receive a $1.0 million upfront license fee and is eligible for certain development and commercial milestone payments of up to $19.0 million, as well as a single-digit percentage royalty on net sales. Full Year 2024 Financial Highlights For the year ended December 31, 2024, revenue totaled $1.0 million in connection with an upfront license fee related to the Exclusive License and Collaboration Agreement with Kuva Labs, Inc. The Company did not have any revenue for the year ended December 31, 2023. For the year ended December 31, 2024, operating expenses totaled $23.4 million compared to $25.7 million for the year ended December 31, 2023, representing a decrease of $2.3 million or 8.9%. Research and development expenses were approximately $11.3 million for the year ended December 31, 2024, compared to $12.7 million for the year ended December 31, 2023, representing a decrease of approximately $1.4 million, or 11.0%. This was primarily due to a reduction in expenses associated with the Phase 2b ASCEND trial which completed enrollment in the prior year, lower spend on chemistry, manufacturing and controls, and lower equity expense. General and administrative expenses were approximately $12.1 million for the year ended December 31, 2024, compared to $13.0 for the year ended December 31, 2023, representing a decrease of approximately $0.9 million or 6.9%. This was primarily due to one-off related severance costs in the prior year associated with the elimination of the Chief Business Officer position on May 1, 2023, a reduction in equity expenses, a decrease in directors’ and officers’ insurance premiums, and a reduction in spend on legal fees partially offset by one-off settlement related costs and an increase in consulting expenses. Overall, net losses were $20.0 million and $20.8 million for the years ended December 31, 2024 and 2023, respectively. Balance Sheet Highlights As of December 31, 2024, Lisata had cash, cash equivalents, and marketable securities of approximately $31.2 million. Based on its existing and planned activities, the Company believes available funds will support current operations into the second quarter of 2026. Net Operating Loss Sale Earlier this year Lisata received $0.9 million in non-dilutive funding as an approved participant of the Technology Business Tax Certificate Transfer Program (the “Program”) sponsored by the New Jersey Economic Development Authority (NJEDA). The Program enables qualifying New Jersey-based biotechnology or technology companies to sell a percentage of their New Jersey net operating losses and research and development tax credits to unrelated qualifying corporations with a lifetime cap on the tax benefit sales of $20.0 million. To date, under the Program, the Company has sold $19.6 million in tax benefits for net proceeds of $18.4 million. Conference Call Information Lisata will hold a live conference call today, February 27, 2025, at 4:30 p.m. Eastern Time to discuss financial results, provide a business update, and answer questions. Those wishing to participate must register for the conference call by way of the following link: CLICK HERE TO REGISTER. Registered participants will receive an email containing conference call details with dial-in options. To avoid delays, the Company encourages participants to dial into the conference call 15 minutes ahead of the scheduled start time. A live webcast of the call will also be accessible under the Investors & News section of Lisata’s website and will be available for replay beginning two hours after the conclusion of the call for 12 months. About Lisata Therapeutics Lisata Therapeutics is a clinical-stage pharmaceutical company dedicated to the discovery, development and commercialization of innovative therapies for the treatment of advanced solid tumors and other major diseases. Lisata’s cyclic peptide product candidate, certepetide, is an investigational drug designed to activate a novel uptake pathway that allows co-administered or tethered anti-cancer drugs to selectively target and penetrate solid tumors more effectively. Lisata has already established noteworthy commercial and R&D partnerships based on its CendR Platform® technology. The Company expects to announce numerous milestones over the next 1.5 years and believes that its projected capital will fund operations into the second quarter of 2026, encompassing anticipated data milestones from its ongoing and planned clinical trials. Learn more about certepetide’s mechanism of action in our short film. For more information on the Company, please visit www.lisata.com. Forward-Looking Statements This communication contains “forward-looking statements” that involve substantial risks and uncertainties for purposes of the safe harbor provided by the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this communication regarding the Company’s clinical development programs are forward-looking statements. In addition, when or if used in this communication, the words “may,” “could,” “should,” “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “predict” and similar expressions and their variants, as they relate to Lisata or its management, may identify forward-looking statements. Examples of forward-looking statements include, but are not limited to, the potential efficacy of certepetide as a treatment for patients with metastatic pancreatic ductal adenocarcinoma and other solid tumors; our beliefs about the potential uses and benefits of certepetide; statements relating to Lisata’s continued listing on the Nasdaq Capital Market; expectations regarding the capitalization, resources and ownership structure of Lisata; the approach Lisata is taking to discover and develop novel therapeutics; the adequacy of Lisata’s capital to support its future operations and its ability to successfully initiate and complete clinical trials; and the difficulty in predicting the time and cost of development of Lisata’s product candidates. Actual results could differ materially from those contained in any forward-looking statement as a result of various factors, including, without limitation: results observed from a single patient case study are not necessarily indicative of final results and one or more of the clinical outcomes may materially change following more comprehensive reviews of the data and as more patient data becomes available, including the risk that unconfirmed responses may not ultimately result in confirmed responses to treatment after follow-up evaluations; the risk that product candidates that appeared promising in early research and clinical trials do not demonstrate safety and/or efficacy in larger-scale or later clinical trials; the safety and efficacy of Lisata’s product candidates, decisions of regulatory authorities and the timing thereof, the duration and impact of regulatory delays in Lisata’s clinical programs, Lisata’s ability to finance its operations, the likelihood and timing of the receipt of future milestone and licensing fees, the future success of Lisata’s scientific studies, Lisata’s ability to successfully develop and commercialize drug candidates, the timing for starting and completing clinical trials, rapid technological change in Lisata’s markets, the ability of Lisata to protect its intellectual property rights; and legislative, regulatory, political and economic developments. The foregoing review of important factors that could cause actual events to differ from expectations should not be construed as exhaustive and should be read in conjunction with statements that are included herein and elsewhere, including the risk factors included in Lisata’s Annual Report on Form 10-K filed with the SEC on February 27, 2025, and in other documents filed by Lisata with the Securities and Exchange Commission. Except as required by applicable law, Lisata undertakes no obligation to revise or update any forward-looking statement, or to make any other forward-looking statements, whether as a result of new information, future events, or otherwise. Lisata Therapeutics Contact: Investors: Lisata Therapeutics John Menditto Vice President, Investor Relations and Corporate Communications Phone: 908-842-0084 Email: jmenditto@lisata.com Media: ICR Healthcare Elizabeth Coleman Account Supervisor Phone: 203-682-4783 Email: elizabeth.coleman@icrhealthcare.com – Tables to follow – This press release was published by a CLEAR® Verified individual.