Soft Tissue Sarcoma Clinical Trial
Official title:
A Phase Ib Trial of Neoadjuvant AMG 232 (KRT-232) Concurrent With Preoperative Radiotherapy in Wild-Type P53 Soft Tissue Sarcoma (STS)
This phase Ib trial studies the side effects of navtemadlin and radiation therapy in treating patients with soft tissue sarcoma. Navtemadlin may stop the growth of cancer 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 navtemadlin and radiation therapy before surgery may make the tumor smaller and reduce the amount of normal tissue that needs to be removed.
PRIMARY OBJECTIVES: I. To evaluate the safety and tolerability of navtemadlin (AMG-232 [KRT-232]) in combination with standard-dose radiotherapy in soft tissue sarcoma (STS) in two separate patient cohorts (A, extremity or body wall; B, abdomen/pelvis/retroperitoneum). II. To determine the maximum tolerated dose/recommended phase II dose (maximum tolerated dose/recommended phase 2 dosage [MTD/RP2D]) of AMG 232 (KRT-232) in combination with radiotherapy. SECONDARY OBJECTIVES: I. To observe and record anti-tumor activity. II. To determine percentage (%) necrosis and pathologic complete response (pCR) in final surgical resection specimen. III. To determine % local failure (LF), disease free survival (DFS) and overall survival (OS) at 2 years. IV. To determine pharmacodynamics (PD) effects of AMG 232 (KRT-232) when combined with radiotherapy by assessing serial serum macrophage inhibitory cytokine (MIC)-1 levels. V. To determine AMG 232 (KRT-232) exposure (pharmacokinetics)-response relationships (PD, toxicity, and efficacy). EXPLORATORY OBJECTIVES: I. To determine tumor volume changes determined by magnetic resonance imaging (MRI) or computed tomography (CT) with and without contrast pre- and post-radiotherapy. II. To characterize clinical outcomes in patients treated with AMG 232 (KRT-232) by genomic biomarkers. III. To determine the correlation between mdm2/4 expression determined by next-generation sequencing (NGS) and the protein levels by immunohistochemistry (IHC). IV. To explore the possibility of identifying tumor genetic mutations in (1) cell-free (cf) circulating tumor deoxyribonucleic acid (ctDNA), (2) deoxyribonucleic acid/ribonucleic acid (DNA/RNA) isolated from exosomes, and determine the concordance of these results and that from NGS. OUTLINE: This is a dose-escalation study of navtemadlin. STEP 1: Patients undergo tumor tissue testing for p53 gene status and receive navtemadlin orally (PO) on day 2, days 2 and 4, days 2-4, days 2-5, or days 1-5 of weeks 1 to 5 in the absence of disease progression or unacceptable toxicity. STEP 2: Patients with a wild-type p53 gene status are assigned to Group I, while patients with deleted/mutant p53 gene status are assigned to Group II. GROUP I: Patients receive navtemadlin as in Step 1 and undergo radiation therapy daily on weeks 1-5 in the absence of disease progression or unacceptable toxicity. GROUP II: Patients undergo radiation therapy daily on weeks 1-5 in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 3 months for 2 years, and then at 2.5 years. ;
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