. Obesity has been associated with improved response to immunotherapy in cancer patients. We investigated the role of Body Mass Index (BMI) in patients from the ARON-1 study (NCT05287464) treated by dual immuno-oncology agents (IO+IO) or a combination of immuno-oncology drug and a Tyrosine Kinase Inhibitors (TKI) as first-line therapy for metastatic Renal Cell Carcinoma (mRCC).
Patients and Methods
. Medical records of patients with documented mRCC treated by immuno-oncology combinations were reviewed at 47 institutions from 16 countries. Patients were assessed for overall survival (OS), Progression-Free Survival (OS), and Overall Clinical Benefit (OCB), defined as the sum of the rate of partial/complete responses and stable disease. Univariate and multivariate analyses were used to explore the association of variables of interest with survival.
. A total of 675 patients were included; BMI was >25 kg/m2 in 345 patients (51%) and was associated with improved OS (55.7 vs 28.4 months, p<0.001). The OCB of patients with BMI >25 kg/m2 vs those with BMI ≤25 kg/m2 was significantly higher only in patients with non-clear cell histology (81% vs 65%, p=0.011), and patients with liver metastases (76% vs 58%, p=0.007), Neutrophil to Lymphocyte Ratio >4 (77% vs 62%, p=0.022) or treated by nivolumab plus ipilimumab (77% vs 64%, p=0.044). In the BMI ≤25 kg/m2 subgroup, significant differences were found between patients with NLR >4 vs ≤4 (62% vs 82%, p=0.002) and patients treated by IO+IO vs IO+TKIs combinations (64% vs 83%, p=0.002).
: Our study suggests that the prognostic significance and the association of BMI with treatment outcome varies across clinico-pathological mRCC subgroups.
Clinical Practice Points
: Obesity is a well-known risk factor for the development of Renal Cell Carcinoma (RCC), one of the most frequent malignant urogenital tumors. The development of immunotherapy (IO)-based combinations for the treatment of metastatic RCC (mRCC) has led to a marked improvement of patients’ outcomes and quality of life. The ARON-1 study (NCT05287464) was designed to globally analyze real-world treatment outcomes of mRCC patients receiving first-line immune-based combinations. In this sub-analysis, we investigated the role of Body Mass Index (BMI) in patients treated by immuno-oncology combinations stratified by clinico-pathological features. According to our results, the prognostic significance and the association of BMI with treatment outcome may vary across clinico-pathological mRCC subgroups.
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Accepted: March 14, 2023
Received in revised form: March 14, 2023
Received: December 2, 2022
Publication stageIn Press Journal Pre-Proof
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