This phase II trial tests the effect of botensilimab and balstilimab before surgery (neoadjuvant) in treating patients with high-risk clear cell renal cell cancer that has not spread from where it first started to other areas of the body (non-metastatic). The current standard treatment for patients with non-metastatic clear cell renal cell cancer may include surgery to completely remove the tumor. This typically involves removing the kidney or part of the kidney (nephrectomy). Immunotherapy with monoclonal antibodies, such as botensilimab and balstilimab, may help the body's immune system attack the tumor, and may interfere with the ability of tumor cells to grow and spread. Giving neoadjuvant botensilimab and balstilimab may be safe, tolerable, and/or effective in treating patients with high-risk non-metastatic clear cell renal cell cancer before undergoing a nephrectomy.
PRIMARY OBJECTIVE: I. To investigate the safety and feasibility of neoadjuvant botensilimab and balstilimab in high-risk (T2a-T4Nany M0 or Tany N1M0) non-metastatic clear cell renal cell carcinoma via assessment of ability to undergo timely nephrectomy. SECONDARY OBJECTIVES: I. To investigate the safety of neoadjuvant botensilimab and balstilimab in high-risk (T2a-T4Nany M0 or Tany N1M0) non-metastatic clear cell renal cell carcinoma via assessment of National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. II. To investigate the surgical morbidity of neoadjuvant botensilimab and balstilimab in high-risk (T2a-T4Nany M0 or Tany N1M0) non-metastatic clear cell renal cell carcinoma via assessment of Clavien-Dindo classification of surgical morbidity, respectively. III. To evaluate the objective response rate (ORR) of the primary tumor following neoadjuvant botensilimab and balstilimab per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria, defined as complete response (CR) or partial response (PR), any time after starting treatment. IV. To evaluate the proportion of patients achieving a major pathologic response (defined as \< 10% of viable tumor in the tumor bed) and a partial pathologic response (defined as less than 50% of the viable tumor in tumor bed), through centralized pathology review. V. To evaluate disease-free survival (DFS), rates of distant metastasis and local recurrence following neoadjuvant botensilimab and balstilimab in high-risk clear cell renal cell carcinoma. EXPLORATORY OBJECTIVES: I. To investigate the relationship between tumor cell programmed death ligand 1 (PD-L1) expression, CD8+ T-cell infiltration in the tumor microenvironment, and clinical outcomes. II. To examine the association of specific genetic alterations (Braun et al., 2020) identified through whole-exome sequencing (WES) and transcriptional clusters (Motzer et al., 2020) identified via ribonucleic acid (RNA) sequencing, in relation to clinical outcomes. III. To characterize the phenotypes of circulating T cells, cytokines, chemokines, and angiokines at baseline and after neoadjuvant therapy to evaluate their association with therapeutic efficacy and clinical response. IV. To assess circulating tumor deoxyribonucleic acid (DNA) (ctDNA) to detect minimal residual disease (MRD) as a marker of therapeutic response and post-nephrectomy clinical outcomes. V. To investigate the correlation between circulating levels of soluble KIM-1 and clinical outcomes, including therapeutic response and post-nephrectomy clinical outcomes. OUTLINE: Patients receive botensilimab intravenously (IV) over 30 minutes on day 1 of weeks 1 and 7 and balstilimab IV over 30 minutes on day 1 of weeks 1, 3, 5, 7, 9, and 11 in the absence of disease progression or unacceptable toxicity. Patients undergo nephrectomy 12-16 weeks from the initiation of neoadjuvant therapy. Additionally, patients undergo blood sample collection and computed tomography (CT) throughout the study. After completion of study treatment, patients are followed every 3 months for up to 1 year post-nephrectomy.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
16
Given IV
Undergo blood sample collection
Given IV
Undergo CT
Undergo nephrectomy
Ancillary studies
Proportion of patients successfully completing neoadjuvant treatment and undergoing planned definitive surgical resection of primary tumor (radical or partial nephrectomy) without significant treatment related delays
The intervention will be considered feasible if at least 80% of enrolled patients (13 out of 16) successfully undergo planned radical or partial nephrectomy following treatment.
Time frame: Up to 1 year post-surgery
Incidence and severity of treatment-related adverse events
Will be analyzed descriptively using frequencies and proportions, stratified by severity according to the National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0.
Time frame: Up to 30 days after last dose of study treatment
Incidence and severity of surgical complications
Will be summarized using the Clavien-Dindo Classification.
Time frame: Up to 30 days after surgery
Objective response rate (ORR)
Will be defined as the proportion of patients achieving a complete response or partial response of the primary tumor as defined by RECIST 1.1 criteria. ORR will be summarized as a proportion with a 95% confidence interval (CI) using the Clopper-Pearson method (exact binomial CIs), and analyses conducted on both the intention-to-treat and per-protocol populations.
Time frame: After neoadjuvant treatment, assessed up to 1 year post-nephrectomy
Major pathologic response (MPR) rate
Will be defined as the proportion of patients with \< 10% viable tumor cells. MPR rate will be determined through centralized pathology review of the surgical specimen, summarized as proportions with 95% CIs using Clopper-Pearson method, and a descriptive comparison between response categories will be presented.
Time frame: Up to 1 year post-surgery
Partial pathologic rate (PPR) rate
Will be defined as the proportion of patients with \< 50% viable tumor cells in the tumor bed of the resected specimen, will be assessed. PPR rate will be determined through centralized pathology review of the surgical specimen, summarized as proportions with 95% CIs using Clopper-Pearson method, and a descriptive comparison between response categories will be presented.
Time frame: Up to 1 year post-surgery
Rates of distant metastasis
Will be defined as proportion of patients experiencing distant metastatic disease. Will be summarized as proportions with 95% CIs.
Time frame: Up to 1 year post-surgery
Rates of local recurrence
Will be defined as proportion of patients experiencing local recurrence after treatment. Will be summarized as proportions with 95% CIs.
Time frame: Up to 1 year post-surgery
Disease-free survival (DFS)
DFS will be analyzed using the Kaplan-Meier method for medians and survival curves, with subgroup comparisons by log-rank tests and hazard ratios estimated using Cox proportional hazards models.
Time frame: From surgery to the first documented evidence of disease recurrence (local, regional, or distant metastasis) or death from any cause, assessed up to 1 year
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