RS Oncology Announces New Preclinical Data Show RSO-021 May Block and/or Reverse the Progression of Aggressive Mesotheliomas, Improving Druggability
13.9.2023 16:57:00 EEST | Business Wire | Press release
RS Oncology, a clinical stage biotechnology company developing innovative therapies to eradicate mesothelioma and other diseases, was part of a collaboration that recently shared new preclinical data at the IASLC 2023 World Conference on Lung Cancer in Singapore. The data, presented by Dr. Dean Fennell, represented a partnership between RS Oncology and other lead research institutions, including the University of Leicester and the Cunniff Laboratory at the University of Vermont Cancer Center.
This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20230912702236/en/
“Sarcomatoid tumors are highly resistant to anti-cancer therapies, and many patients run out of available treatment options. Our findings here might have unveiled a druggable ‘Achilles Heel’ against this terrible disease,” said Dr. Fennell, presenting author on the study. Dr. Fennell and Dr. Cunniff shown at lunch during AACR conference 2023. (Photo courtesy of George Naumov)
Mesotheliomas can transform from a less aggressive epithelioid malignancy to a more aggressive sarcomatoid form. Using biphasic mesotheliomas as a model containing both epithelioid and sarcomatoid features, investigators at the University of Leicester, led by Dr. Fennell, conducted a geospatial analysis of patient tissues to explore the molecular signatures associated with the histological regions.
Using sophisticated spatial analysis tools coupled with machine learning approaches, the group found that the more aggressive sarcomatoid regions had distinct molecular signatures driving pro-tumor pathways, drug resistance, and increased metastatic potential. These findings were validated across an independent cohort of 150 mesothelioma patient tissues. Notably, tumor regions containing sarcomatoid tissue showed features of increased resistance to oxidative stress – a critical tumor cell adaptation for survival.
In collaboration with Dr. Brian Cunniff’s laboratory, the team then evaluated molecular signatures of human biphasic mesothelioma tumor cells following treatment with the irreversible PRX3 inhibitor RSO-021, which is currently being evaluated in a Phase 1/2 clinical trial in patients with malignant pleural effusion caused by advanced/metastatic solid tumors (NCT05278975). RSO-021 treatment reversed the gene signatures associated with epithelial-to-sarcomatoid transition, including downregulation of hypoxia, glycolysis, and epithelial-to-mesenchymal transition (EMT)-associated genes. These results suggest that this transition, thought to be unidirectional in nature, may be PRX3-dependent, druggable, and now reversible.
“Sarcomatoid tumors are highly resistant to anti-cancer therapies, and many patients run out of available treatment options. Our findings might have unveiled a druggable ‘Achilles Heel’ against this terrible disease,” said Dr. Fennell, presenting author on the study. “The ability to treat such tumors with RSO-021 and revert them to epithelioid malignancies could delay or even prevent emergence of the most aggressive features associated with mesothelioma. Further, RSO-021 could potentially sensitize them to other treatments.”
Presentation Details
Abstract Number: MA17.11
Session:
MA17 - Current Standards and Future Directions in Mesothelioma
Title: Spatial Transformation in Mesothelioma Involves a Hypoxia-TGF Beta-EMT Axis that is Reversible via PRX3 Inhibition
Date: Tuesday, September 12, 10:45 AM UTC +8
About RS Oncology
RS Oncology (RSO) is a clinical stage biotechnology company based in Cambridge, Massachusetts with a mission to eradicate mesothelioma and other diseases worldwide through novel science and an innovative business model.
To view this piece of content from cts.businesswire.com, please give your consent at the top of this page.
View source version on businesswire.com: https://www.businesswire.com/news/home/20230912702236/en/
Contact information
Jarrett Duncan, CEO
j.duncan@rsoncology.com
About Business Wire
For more than 50 years, Business Wire has been the global leader in press release distribution and regulatory disclosure.
Subscribe to releases from Business Wire
Subscribe to all the latest releases from Business Wire by registering your e-mail address below. You can unsubscribe at any time.
Latest releases from Business Wire
Klarna Card reaches 5 million active customers19.3.2026 16:31:00 EET | Press release
Klarna, the global digital bank and payments provider, today announced that the Klarna Card has reached 5 million active customers globally, underscoring rapid adoption as consumers shift towards new forms of payment which provide more control over day-to-day money management. The card draws from the customer's own funds for everyday spending, with the option to spread the cost of a specific purchase, like a large appliance or a flight, when it makes sense to do so. The result is a card that offers genuine spending control without the long-term debt obligations that come with traditional credit cards. The card’s growth is reinforced by Klarna’s membership program. The program offers premium perks such as airport lounge access, travel insurance, and lifestyle subscriptions — without requiring users to take on debt, meet spending thresholds, or revolve balances. By separating everyday spending from rewards, Klarna is challenging the strings-attached model legacy banks have long relied on
Andersen Consulting Expands Technology Platform in France19.3.2026 15:30:00 EET | Press release
Andersen Consulting expands its digital transformation offering through a Collaboration Agreement with Teolia Consulting, a French firm specializing in project and product management, cloud platform engineering, data transformation, and Atlassian suite integration and adoption. Founded in 2014, Teolia Consulting helps organizations achieve digital performance, from agile methodology to time-to-market solutions. The firm’s expertise is focused on delivering integrated strategies that align technology with organizational change. The firm works across industries including banking, insurance, fashion, and retail, empowering clients to strengthen resilience and accelerate digital maturity. “At Teolia Consulting, we believe that true transformation happens when technology and people evolve together,” said Lucienne Jacquet, managing partner of Teolia. “By collaborating with Andersen Consulting, we not only amplify our impact but also gain access to a worldwide organization of like-minded indi
Stonebranch Releases 2026 Global State of IT Automation Report, Revealing Orchestration as the Missing Link for AI Adoption and Trust19.3.2026 15:30:00 EET | Press release
Stonebranch, a leading provider of service orchestration and automation solutions, today released its annual 2026 Global State of IT Automation Report, the company’s most comprehensive research study to date. Based on responses from 402 IT automation professionals spanning C-suite executives to individual contributors across North America, EMEA, Latin America, and APAC, the report provides a detailed, data-driven portrait of how enterprises are investing in, deploying, and deriving value from IT automation in 2026. “This year’s findings highlight an important shift in how organizations approach automation,” said Giuseppe Damiani, CEO of Stonebranch. “Organizations are now building automation as strategic infrastructure — a governed, scalable foundation that spans hybrid environments, operationalizes AI, and delivers automation-as-a-service to thousands of users across the enterprise. The companies that get orchestration right are not just running more efficient IT operations. They are
Perma-Pipe Accelerates Growth with New U.S. Northeast Facility Investment to serve Artificial Intelligence Data Center customers, Provides Middle East Operations’ Update and Concludes the Board’s Review of Strategic Alternatives19.3.2026 15:00:00 EET | Press release
Perma-Pipe International Holdings, Inc. (the “Company”) today announced a strategic expansion initiative focused on accelerating growth through entry into the high-demand U.S. Northeast region. The Company is positioning itself to capitalize on the rapidly expanding Artificial Intelligence (“AI”)-driven data center market in both the United States and international markets while continuing to reinforce its leadership in critical infrastructure solutions. As part of this growth strategy, Perma-Pipe will prioritize investments aimed at expanding its presence in the rapidly evolving AI data center sector. The initiative reflects the Company’s long-term commitment to supporting next-generation technology infrastructure and strengthening its position in the global energy, industrial, and infrastructure markets. Expansion in the U.S. Northeast President & Chief Executive Officer, Saleh Sagr said, “We are excited to announce the expansion of our operations with a new facility in the Northeast
Armis Launches First-of-Its-Kind Benchmark Report Warning of Critical Security Gaps in AI-Native Development19.3.2026 14:00:00 EET | Press release
Armis, the cyber exposure management & security company, is warning that the rapid enterprise adoption of AI-native development is outpacing critical security safeguards, leaving organizations exposed to systemic vulnerabilities. New research from Armis Labs’ Trusted Vibing Benchmark Report, which evaluates 18 leading generative AI models across 31 test scenarios, reveals a 100% failure rate in generating secure code. These vulnerabilities are most prevalent in high-risk areas like memory buffer overflows, design file uploads and authentication systems. Therefore, organizations should immediately implement AI-native application security controls to reduce risk. “The era of vibe coding is here, but speed should not come at the cost of security,” said Nadir Izrael, CTO and Co-Founder of Armis. “Our research finds that the worst offenders are the same ones selling security solutions for the very vulnerabilities their models create. If the industry continues to integrate autonomous code wi
In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.
Visit our pressroom