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Clinical Trials of Sarcoma

A special issue of Cancers (ISSN 2072-6694).

Deadline for manuscript submissions: closed (25 November 2025) | Viewed by 2330

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Guest Editor
University Hospital of Regensburg, Department of Pediatric Hematology, Oncology and Stem Cell Transplantation, 93053 Regensburg, Germany
Interests: cancer; sarcoma; clinical trial
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Special Issue Information

Dear Colleagues,

This Special Issue focuses on advancements in clinical trials for sarcoma, a rare and diverse group of cancers arising in connective tissues. Despite significant challenges in treatment due to its heterogeneity, recent breakthroughs in targeted therapies, immunotherapy, and precision medicine are reshaping outcomes for sarcoma patients. This collection invites original research, reviews, and case studies highlighting innovative trial designs, biomarker-driven strategies, and translational approaches. By showcasing cutting-edge developments and collaborative efforts, this Special Issue aims at advancing understanding and fostering new therapeutic strategies to improve survival and quality of life for sarcoma patients worldwide.

Dr. Patrick Schlegel
Guest Editor

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Keywords

  • cancer
  • sarcoma
  • clinical trial

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Published Papers (2 papers)

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Research

23 pages, 2530 KB  
Article
Caloric Restriction Enhances Chemotherapy Efficacy and Reshapes Stress Responses in Sarcoma
by Jorddam Almondes Martins, Irislene Costa Pereira, Thiago Sousa Reinaldo, Dallyla Jennifer Morais de Sousa, Isabelle Vasconcelos Rodrigues, Beatriz de Mello Pereira Rego, Aureliano Machado de Oliveira, Taline Alves Nobre, Athanara Alves de Sousa, João Pedro Alves Damasceno do Lago, Rayran Walter Ramos de Sousa, Diego Pereira de Menezes, Alda Cássia Alves da Silva, Dalton Dittz, Adriana Maria Viana Nunes, Vladimir Costa Silva, Juliana Soares Severo, Moisés Tolentino Bento da Silva, Paulo Michel Pinheiro Ferreira, João Marcelo de Castro e Sousa and Francisco Leonardo Torres-Lealadd Show full author list remove Hide full author list
Cancers 2026, 18(1), 110; https://doi.org/10.3390/cancers18010110 (registering DOI) - 29 Dec 2025
Abstract
Background: Oncological treatment remains a major clinical challenge. Despite therapeutic advances and the diversity of available approaches, many tumors continue to exhibit limited responsiveness to chemotherapy. In this context, nutrition has emerged as a promising complementary strategy to support cancer therapy. In particular, [...] Read more.
Background: Oncological treatment remains a major clinical challenge. Despite therapeutic advances and the diversity of available approaches, many tumors continue to exhibit limited responsiveness to chemotherapy. In this context, nutrition has emerged as a promising complementary strategy to support cancer therapy. In particular, interventions based on nutritional deprivation have gained prominence due to their ability to modulate tumor metabolism, inducing alterations that may increase the sensitivity of cancer cells to conventional treatments. Accordingly, the present study aimed to evaluate the safety and efficacy of caloric restriction combined with chemotherapy in a Sarcoma-180 model, investigating its effects on immunological and hematological parameters, antioxidant activity, oxidative stress, and tumor and liver morphology, as well as DNA damage. Methods: Mice bearing Sarcoma-180 were randomly assigned to four groups: Ad Libitum (AL), Ad Libitum + Doxorubicin (ALDOX), Caloric Restriction (CR), and Caloric Restriction + Doxorubicin (CRDOX). Assessment included tumor weight and volume, food and caloric intake, hematotoxicity, lipid metabolism, oxidative stress and antioxidant markers, genotoxicity, morphological alterations in the tumor and liver, and overall survival. Results: The data obtained demonstrate that caloric restriction combined with doxorubicin is both safe and feasible, as it preserves body weight and does not induce metabolic disturbances. Importantly, this combined strategy produced a marked reduction in tumor volume and mass while also mitigating the hematotoxicity typically associated with doxorubicin. In peripheral blood, the regimen decreased chemotherapy-induced DNA damage, supporting a systemic protective effect. Consistently, the combination reduced oxidative stress markers (NOx and MDA) and enhanced antioxidant activity within the tumor. Histological analyses further confirmed these outcomes, showing tumor cell death with features compatible with apoptosis and reduced local invasion. Together, these data indicate that caloric restriction enhances the antitumor efficacy of doxorubicin while simultaneously improving treatment tolerance. Conclusions: This study demonstrates that caloric restriction, combined with doxorubicin, is safe, well-tolerated, and enhances the antitumor response in the Sarcoma-180 model. Full article
(This article belongs to the Special Issue Clinical Trials of Sarcoma)
23 pages, 2621 KB  
Article
AMPK Signaling Regulates Epithelioid Hemangioendothelioma Cell Growth
by Ryan Kanai, Sarah McMullan, Pukar Baniya, Roselyn S. Dai, Emily Norton, Kaila Lasher, Chloe T. Purello, Caleb N. Seavey, Brian P. Rubin and John M. Lamar
Cancers 2025, 17(17), 2889; https://doi.org/10.3390/cancers17172889 - 2 Sep 2025
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Abstract
Background/Objectives: Epithelioid Hemangioendothelioma (EHE) is an ultra-rare, metastatic vascular sarcoma with limited therapeutic options. The hallmark of EHE is a chromosomal translocation that produces the WWTR1-CAMTA1 gene fusion, encoding the aberrant transcriptional regulator TAZ-CAMTA1. Given its central role in the EHE initiation and [...] Read more.
Background/Objectives: Epithelioid Hemangioendothelioma (EHE) is an ultra-rare, metastatic vascular sarcoma with limited therapeutic options. The hallmark of EHE is a chromosomal translocation that produces the WWTR1-CAMTA1 gene fusion, encoding the aberrant transcriptional regulator TAZ-CAMTA1. Given its central role in the EHE initiation and progression, TAZ-CAMTA1 represents a compelling therapeutic target. Methods and Results: In this study, we identified AMP-activated protein kinase (AMPK) as one of several proteins capable of repressing the TAZ-CAMTA1 transcriptional activity in NIH3T3 and HEK293 cell lines. The pharmacologic activation of AMPK inhibited the proliferation of EHE cell lines without inducing apoptosis; however, in contrast to the NIH3T3 and HEK293 models, AMPK activation in EHE cells unexpectedly increased the TAZ-CAMTA1 expression and activity. Notably, elevated TAZ-CAMTA1 expression was also associated with reduced EHE cell growth, suggesting that the induction of TAZ-CAMTA1 may be one mechanism by which AMPK suppresses EHE growth. Additionally, we found that AMPK inhibits mTOR activity and that direct mTOR inhibition also suppresses EHE cell growth. Conclusions: Together, these findings demonstrate that AMPK activation impairs EHE viability through dual mechanisms: by promoting TAZ-CAMTA1 expression and by inhibiting mTOR signaling. This work highlights AMPK as a potential therapeutic target in EHE and supports the growing body of evidence favoring mTOR inhibitors as promising treatments for this rare cancer. Full article
(This article belongs to the Special Issue Clinical Trials of Sarcoma)
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