Dedifferentiated Liposarcoma

The purpose of this study is to investigate the study drug, OKN4395, administered alone and in combination with pembrolizumab. The overall objectives of this study are to determine the safety and tolerability (degree to which side effects of a drug can be tolerated) of OKN4395 alone and in combination with pembrolizumab, OKN4395 and metabolites (broken-down substances) of OKN4395 levels in the blood, and antitumor activity of OKN4395 alone and in combination with pembrolizumab. This study will be split into 2 parts. Part 1a will look at multiple doses of OKN4395 either alone (monotherapy) or with pembrolizumab (combination therapy) administered on day 1 of each 21-day cycle in patients with solid tumors until the participant has disease progression or discontinues for any reason. The dose of OKN4395 will be increased, after each group of 3 or more participants completes their first 3 weeks of treatment and their data is evaluated for safety, with a planned dose range from 10 mg twice a day to 450 mg twice a day through 13 dose levels. Part 1a also includes a parallel substudy (Substudy 1) consisting of at least 12 participants, aiming to test the effect of food and stomach acid on the levels of OKN4395 in the blood as well as its tolerability. Part 1b will evaluate OKN4395 alone and in combination with pembrolizumab administered on day 1 of each 21-day cycle in patients with selected cancer types. Part 1b will comprise 4 cohorts: Cohort 1 in sarcoma (OKN4395 alone), Cohort 2 in non-small cell lung cancer (NSCLC), Cohort 3 in colorectal cancer, and Cohort 4 in gastric cancer (GC), with cohorts 2 to 4 in combination with pembrolizumab. The overall study will enrol approximately 146 participants with up to 54 participants to receive OKN4395 alone and 12 participants to receive OKN4395 in combination with pembrolizumab in Part 1a, and 80 participants in Part 1b split: 20 on monotherapy and 60 on combination therapy. The study will be conducted in the US, Australia, UK and in the EU.

This phase I trial tests the safety, side effects, and best dose of abemaciclib and how well it works with radiation therapy before surgery in treating patients with high-risk adipocytic retroperitoneal sarcoma. Abemaciclib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Giving abemaciclib together with radiation therapy before surgery may shrink tumors in patients with high-risk adipocytic retroperitoneal sarcoma.

The purpose of this study is to find out whether mirdametinib in combination with palbociclib is an effective and safe treatment for people with metastatic, recurrent, and unresectable liposarcoma. This study will test different doses of mirdametinib in combination with a fixed dose of palbociclib to find the best safe dose for further testing.

This early phase oncology trial will be conducted at various study centers to investigate the safety, tolerability, and antitumor activity of STC-15 (a METTL3 inhibitor) in combination with toripalimab (anti- programmed cell death 1 \[PD-1\]) in advanced unresectable or metastatic tumors. The Phase 2 Monotherapy part is an open-label, non-randomized, multicenter Simon's 2-stage design that investigates the safety, tolerability, and antitumor activity of STC-15 in participants with selected, relapsed sarcomas subtypes, dedifferentiated (DD) liposarcoma and leiomyosarcoma (uterine and non-uterine).

Dedifferentiated liposarcomas (DDLPS) are aggressive soft tissue sarcomas with no effective medical treatment options. Immunotherapy with checkpoint inhibitors, so-called PD-1 inhibitors, have shown some effect in DDLPS in previous studies. Effect of immunotherapy can be improved by combining it with other types of tumor drugs. Medicines that inhibit signaling via the FGF receptor, so-called FGFR inhibitors, have shown a tumor-slowing effect in DDLPS in early studies. FGFR inhibitors can also induce changes that make the tumor more available to treatment with immunotherapy. The study aims to investigate whether the combination of an FGFR inhibitor, pemigatinib, with a PD-1 inhibitor, retifanlimab can provide a tumor-slowing effect in patients with advanced DDLPS who have progressed on first-line treatment.

Evaluating the efficacy and safety of liposomal doxorubicin hydrochloride and apatinib in combination with camrelizumab for the first-line treatment of advanced/unresectable dedifferentiated liposarcoma

This phase III trial compares chest computed tomography (CT) to chest x-ray (CXR) for lung surveillance after curative-intent resection of high-risk truncal-extremity soft tissue sarcoma. Currently, complete oncologic resection (with or without radiation therapy) is the standard of care for most high-risk soft tissue sarcoma that has not spread to other parts of the body (localized). However, despite curative-intent resection, 20-40% of patients will develop cancer that has spread from where it first started (primary site) to other places in the body (distant metastases), with the lungs being the most common site. Thus, lung surveillance is important for detection of lung metastases in order to facilitate timely treatment. Although there is general agreement about the usefulness of postoperative surveillance, consensus is lacking regarding the optimal modality for lung surveillance after curative-intent resection for high-risk soft tissue sarcoma. Current National Comprehensive Cancer Network guidelines recommend chest imaging with CT or CXR every 3-6 months for 2-3 years, then every 6 months for the next two years, and then annually after that for high-risk tumors. Data from across the United States and internationally indicate that there is considerable variation in clinical practice with regards to the use of CXR versus CT chest for lung surveillance. The information gained from this trial may allow researchers to determine the effectiveness of varying imaging modalities needed for optimal surveillance for patients with extremity or truncal soft tissue sarcoma.