Efficacy and safety of first‐line nivolumab plus ipilimumab in patients with metastatic renal cell carcinoma: A multicenter retrospective study

Real-world outcomes of nivolumab plus ipilimumab combination therapy for advanced renal cell carcinoma in Japanese patients: data with a minimum of 3 years of follow-up

BACKGROUND

Long-term follow-up data regarding treatment outcomes of nivolumab plus ipilimumab combination therapy for advanced renal cell carcinoma as a first-line therapy are limited in real-world Japanese populations.

METHODS

We retrospectively evaluated data of 56 advanced renal cell carcinoma patients treated with nivolumab plus ipilimumab, with a follow-up of at least 3 years. Survival, tumour response and adverse event profiles were assessed.

RESULTS

A total of 41 patients (73%) were histopathologically diagnosed with clear-cell renal cell carcinoma, and 34 (61%) were categorized into the International Metastatic renal cell carcinoma Database Consortium intermediate-risk group. The median follow-up period was 34.4 months. Regarding an effectiveness profile, median progression-free survival, time to treatment failure and overall survival were 9.01, 12.5 and 49.0 months, respectively. Objective response was observed in 27 patients (48%), including eight patients with complete response (14%), and the median duration of response was 30.8 months. Multivariate analyses showed that clear-cell histology was an independent factor of longer overall survival (hazard ratio: 0.23, P = 0.0013). Regarding safety profiles, adverse events of any grade and those with grade ≥3 developed in 40 (71%) and 25 patients (45%), respectively. Median time to adverse event development was 1.68 months. Treatment was interrupted in 28 patients (50%), and corticosteroid administration was needed in 25 (45%).

CONCLUSION

The 3-year follow-up data showed that nivolumab plus ipilimumab combination therapy exhibited a feasible effectiveness in real-world Japanese patients with advanced renal cell carcinoma. Accordingly, the high risk of adverse event development, which often requires treatment withdrawal and corticosteroid administration, should be considered.

Prognostic Impact of Immune-Related Adverse Events as First-Line Therapy for Metastatic Renal Cell Carcinoma Treated With Nivolumab Plus Ipilimumab: A Multicenter Retrospective Study

BACKGROUND

Immune checkpoint inhibitors can cause various immune-related adverse events (irAEs). This study aimed to evaluate the association between the incidence of irAEs and oncological outcomes of metastatic renal cell carcinoma (mRCC) treated with nivolumab plus ipilimumab as first-line therapy.

PATIENTS AND METHODS

We retrospectively analyzed data from 69 patients with mRCC treated with nivolumab plus ipilimumab as first-line therapy between September 2018 and September 2021 at 4 institutions. Cox regression analyses were performed to investigate the important factors affecting overall survival (OS) in patients with mRCC treated with nivolumab plus ipilimumab as first-line therapy.

RESULTS

During observation with a median follow-up of 9.1 months, the median OS was not reached, while the median progression-free survival was 6.0 months. Patients with irAEs had significantly prolonged OS and progression-free survival than those without irAEs (p = .012 and .002, respectively). Multivariate analysis showed that 3 independent factors, including C-reactive protein (CRP), irAEs, and performance status (PS), were significantly associated with OS (p = .04, .02, and .01, respectively). The patients were subsequently divided into 3 groups as follows: group 1, 20 patients with all 3 independent OS predictors; group 2, 18 patients with irAE predictors alone or 2 positive independent OS predictors (irAEs + CRP or irAEs + PS); group 3, 31 patients with 3 negative independent S predictors. OS varied significantly among the 3 groups (p = .004).

CONCLUSION

The appearance of irAEs could predict OS in patients with mRCC treated with nivolumab plus ipilimumab as the first-line therapy.

All-cause and immune checkpoint inhibitor-associated acute kidney injury in immune checkpoint inhibitor users: a meta-analysis of occurrence rate, risk factors and mortality

Background

Immune checkpoint inhibitors (ICIs) have been associated with acute kidney injury (AKI). However, the occurrence rate of ICI-related AKI has not been systematically examined. Additionally, exposure to proton pump inhibitors (PPIs) and non-steroidal anti-inflammatory drugs (NSAIDs) were considered as risk factors for AKI, but with inconclusive results in ICI-related AKI. Our aim was to analyse the occurrence rate of all-cause AKI and ICI-related AKI and the occurrence rates of severe AKI and dialysis-requiring AKI, and to determine whether exposure to PPIs and NSAIDs poses a risk for all-cause and ICI-related AKI.

Methods

This study population was adult ICI recipients. A systematic review was conducted by searching MEDLINE, Embase and PubMed through October 2023. We included prospective trials and observational studies that reported any of the following outcomes: the occurrence rate of all-cause or ICI-related AKI, the relationship between PPI or NSAID exposure and AKI development or the mortality rate in the AKI or non-AKI group. Proportional meta-analysis and pairwise meta-analysis were performed. The evidence certainty was assessed using the Grading of Recommendations Assessment, Development and Evaluation framework.

Results

A total of 120 studies comprising 46 417 patients were included. The occurrence rates of all-cause AKI were 7.4% (14.6% from retrospective studies and 1.2% from prospective clinical trials). The occurrence rate of ICI-related AKI was 3.2%. The use of PPIs was associated with an odds ratio (OR) of 1.77 [95% confidence interval (CI) 1.43-2.18] for all-cause AKI and an OR of 2.42 (95% CI 1.96-2.97) for ICI-related AKI. The use of NSAIDs was associated with an OR of 1.77 (95% CI 1.10-2.83) for all-cause AKI and an OR of 2.57 (95% CI 1.68-3.93) for ICI-related AKI.

Conclusions

Our analysis revealed that approximately 1 in 13 adult ICI recipients may experience all-cause AKI, while 1 in 33 adult ICI recipients may experience ICI-related AKI. Exposure to PPIs and NSAIDs was associated with an increased OR risk for AKI in the current meta-analysis.

Association between immune-related adverse events and survival in patients with renal cell carcinoma treated with nivolumab plus ipilimumab: immortal time bias-corrected analysis

BACKGROUND

Immune-related adverse events (irAEs) in patients treated with immune check inhibitors are associated with favourable response rate and survivals in multiple cancers, including renal cell carcinoma (RCC). The aim of this study was to investigate how irAEs were associated with improved survivals in advanced RCC patients treated with nivolumab plus ipilimumab.

MATERIALS AND METHODS

This retrospective study included patients who received nivolumab plus ipilimumab at six centres, institutions, or hospitals between September 2018 and February 2022. We assessed associations of the development and the number of irAEs with overall survival (OS) and progression-free survival (PFS). To eliminate immortal time bias, landmark analysis and a Cox model with time-dependent variables were used.

RESULTS

This study included 129 patients with a median follow-up of 12.3 months. The 2-year OS and PFS rates were 55% and 42%, respectively. Ninety six patients experienced irAEs. The development of irAEs was positively associated with OS and PFS rates (hazard ratio [HR] 0.328, 95% confidence interval [CI] 0.165-0.648, p = 0.001; HR 0.334, 95% CI 0.151-0.737, p = 0.007). Patients who experienced multiple irAEs had longer OS (HR 0.507, 95% CI 0.235-1.097, p = 0.085 or HR 0.245, 95% CI 0.110-0.544, p < 0.001) and PFS (HR 0.572, 95% CI 0.316-1.036, p = 0.085 or HR 0.267, 95% CI 0.113-0.628, p = 0.002) compared with those who experienced single or zero irAE.

CONCLUSIONS

Developing irAEs, particularly multiple irAEs, is associated with favourable survivals in advanced RCC patients treated with nivolumab plus ipilimumab.

Prognostic Value of Absolute Lymphocyte Count in Patients with Advanced Renal Cell Carcinoma Treated with Nivolumab Plus Ipilimumab

Nivolumab and ipilimumab (NIVO + IPI) is standard therapy for patients with advanced renal cell carcinoma (RCC). Absolute lymphocyte count (ALC) is a valuable prognostic factor in patients with various cancers treated with immune checkpoint inhibitors. Herein, we determined the prognostic value of pretreatment ALC in advanced RCC patients treated with NIVO + IPI as first-line therapy. Data from 46 advanced RCC patients treated with NIVO + IPI between September 2018 and August 2022 were retrospectively reviewed and analyzed. Median progression-free survival (PFS) and overall survival (OS) were significantly shorter in patients with low than high ALC (PFS: p = 0.0095; OS: p = 0.0182). Multivariate analysis suggested that prior nephrectomy [hazard ratio (HR) = 3.854, 95% confidence interval (CI) = 1.433-10.359, p = 0.0075] and pretreatment ALC (HR = 2.513, 95% CI = 1.119-5.648, p = 0.0257) were independent factors for PFS. Our new prognostic ALNx model based on ALC and prior nephrectomy suggested that the poor-risk group was a predictor of significantly worse PFS (p < 0.0001) and OS (p = 0.0016). Collectively, the developed ALNx model may be a novel predictor of response in advanced RCC patients treated with NIVO + IPI.

Serum C-reactive Protein Level Predicts Overall Survival for Clear Cell and Non-Clear Cell Renal Cell Carcinoma Treated with Ipilimumab plus Nivolumab

Serum C-reactive protein (CRP) is known to be a biomarker for systemic inflammatory reactions. In the present study, we sought to measure the predictive value of serum CRP level for metastatic renal cell carcinoma (mRCC) treated with first-line ipilimumab and nivolumab using our real-world clinical dataset including non-clear cell RCC (nccRCC). The clinical record of patients who underwent the first-line ipilimumab plus nivolumab treatment for mRCC including ccRCC and nccRCC from 2018 to 2021 was retrospectively analyzed. All patients were diagnosed with either intermediate or poor-risk group defined by IMCD (international metastatic RCC database consortium). In total, 74 patients were involved. The median age was 68 years and 24 (32.4%) patients deceased during the follow-up. Forty-five (61%) and 29 (39%) patients were classified into intermediate and poor-risk groups. The one-year overall survival (OS) rate and objective response rate were 65% and 41% for all 74 mRCC patients, respectively. The receiver operating characteristic curve identified 1.0 mg/dL of serum CRP level as an ideal cut-off for predicting overall survival (OS). Serum CRP > 1.0 mg/dL and nccRCC were the independent predictors for OS in 74 mRCC patients. OS for patients with CRP > 1 mg/dL was significantly shorter than those with CRP < 1 mg/dL in both ccRCC (58 patient: p = 0.009) and nccRCC (16 patients: p = 0.008). The present study indicated that serum CRP level is a prognostic indicator for OS in both ccRCC and nccRCC patients treated with the first-line ipilimumab plus nivolumab treatment.

Real-world effectiveness of nivolumab plus ipilimumab and second-line therapy in Japanese untreated patients with metastatic renal cell carcinoma: 2-year analysis from a multicenter retrospective clinical study (J-cardinal study)

Background

Nivolumab plus ipilimumab combination therapy is one of the standard therapies for untreated renal cell carcinoma patients with an International Metastatic Renal Cell Carcinoma Database Consortium intermediate/poor risk. We have previously reported the 1-year analysis results of the effectiveness and safety of nivolumab plus ipilimumab combination therapy in the real-world setting in Japan. Here, we report the effectiveness of nivolumab plus ipilimumab combination therapy and of second-line therapy, using 2-year analysis.

Methods

This retrospective observational study enrolled Japanese patients with previously untreated metastatic renal cell carcinoma who initiated nivolumab plus ipilimumab combination therapy between August 2018 and January 2019. Data were collected from patients’ medical records at baseline and at 3 months, 1 year and 2 years after the last enrollment.

Results

Of the 45 patients enrolled, 10 patients (22.2%) each had non-clear cell renal cell carcinoma and Eastern Cooperative Oncology Group performance status ≥2 at baseline. Median follow-up period was 24.0 months; objective response rate was 41.5%, with 6 patients achieving complete response; median progression-free survival was 17.8 months and 24-month progression-free survival and overall survival rates were 41.6 and 59.1%, respectively. Second-line therapy achieved an objective response rate of 20%; median progression-free survival was 9.8 months. Median progression-free survival 2 was 26.4 months.

Conclusions

The effectiveness of nivolumab plus ipilimumab combination therapy at 2-year analysis in the real-world setting in Japan was comparable to that reported in CheckMate 214. The current analysis also demonstrated the effectiveness of second-line therapy after nivolumab plus ipilimumab combination therapy.

Real-world efficacy and safety of nivolumab plus ipilimumab in untreated metastatic renal cell carcinoma, and the impact of previous nephrectomy on clinical outcome: Japanese multi-institutional retrospective study

BACKGROUND

In metastatic renal-cell carcinoma (mRCC), recent clinical trials have shown efficacy of first-line combination therapy, as evidenced by better clinical outcome over target therapy. However, there are insufficient real-world evidences in mRCC patients in Japan.

METHODS

We performed a multicenter retrospective study of 72 mRCC patients who received nivolumab plus ipilimumab as first-line treatment between September 2018 and July 2021. Patient's characteristics, clinical outcomes and safety were retrospectively reviewed. We analyzed overall response rate (ORR), disease control rate (DCR), progression-free survival (PFS), and overall survival (OS) in patients treated with combination therapy.

RESULTS

Of all patients, the median age was 70 years (range, 36-86) and the major type of histology was clear cell RCC (n = 55; 76.4%). Progressive disease (n = 25; 34.8%) and irAEs (n = 22; 30.6%) were the most common causes for discontinuing treatment. Median PFS and OS seemed similar between patients who discontinued treatment because of irAEs and for patients who did not (p = 0.360 and p = 0.069, respectively). Importantly, for patients with synchronous metastatic disease at diagnosis (n = 56), nephrectomy before initiating nivolumab plus ipilimumab had a significantly positive impact on better OS when compared to that in patients without nephrectomy (p = 0.028).

CONCLUSION

This study confirms efficacy and safety of nivolumab plus ipilimumab for mRCC patients in real-world settings. Furthermore, nivolumab plus ipilimumab was associated with a better outcome in patients who had undergone nephrectomy at diagnosis for synchronous mRCC.

Hematological prognosticators in metastatic renal cell cancer treated with immune checkpoint inhibitors: a meta-analysis

Aim: We aimed to assess the prognostic value of pretreatment hematological biomarkers in patients with metastatic renal cell carcinoma (mRCC) treated with immune checkpoint inhibitors (ICIs). Methods: PubMed, Web of Science and Scopus databases were searched for articles according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Results: Fifteen studies comprising 1530 patients were eligible for meta-analysis. High levels of neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), C-reactive protein and lactate dehydrogenase were significantly associated with worse progression-free survival. High NLR and PLR were significantly associated with worse overall survival. Conclusion: High pretreatment NLR and PLR appear to be hematological prognostic factors of progression and overall mortality in mRCC patients treated with ICIs. These findings might help in the design of correlative biomarker studies to guide the clinical decision-making in the immune checkpoint inhibitor era.

Effect of active anticancer therapy on serologic response to SARS-CoV-2 BNT162b2 vaccine in patients with urothelial and renal cell carcinoma

Objectives

To evaluate the serologic response to the BNT162b2 messenger ribonucleic acid vaccine in patients with urothelial carcinoma and renal cell carcinoma.

Methods

Between June 2021 and November 2021, we retrospectively evaluated blood samples from 60 healthy controls (control group), 57 patients with urothelial carcinoma, and 28 patients with renal cell carcinoma who had received two doses of the BNT162b2 vaccine at Hirosaki University Hospital. We determined the immunoglobulin G antibody titers against the severe acute respiratory syndrome coronavirus 2 spike receptor‐binding domain. Seropositivity was defined as ≥15 U/mL. We investigate factors associated with antibody titers and seropositivity in the patients with urothelial carcinoma and renal cell carcinoma.

Results

Antibody titers in the control, urothelial carcinoma, and renal cell carcinoma groups were 813, 431, and 500 U/mL, respectively. Seropositivity was 100%, 90%, and 96% in the control, urothelial carcinoma, and renal cell carcinoma groups, respectively. Of the 85 patients, 37 of 57 (65%) and 21 of 28 (75%) were actively undergoing anticancer treatment for urothelial carcinoma and renal cell carcinoma, respectively. Anti‐severe acute respiratory syndrome coronavirus 2 spike immunoglobulin G antibody titers and seropositivity was not significantly different between the patients with urothelial carcinoma and renal cell carcinoma. Anti‐severe acute respiratory syndrome coronavirus 2 spike immunoglobulin G antibody titers were not significantly associated with active anticancer therapy or steroid treatment for immune‐related adverse events. Univariable logistic regression analysis revealed that older age and metastatic disease were significantly and negatively associated with seropositivity.

Conclusions

Patients with urothelial carcinoma or renal cell carcinoma exhibited an adequate antibody response to the BNT162b2 vaccine. Active anticancer therapy was not significantly associated with seropositivity following vaccination with severe acute respiratory syndrome coronavirus 2 BNT162b2 in patients with urothelial carcinoma and renal cell carcinoma.

Efficacy of nivolumab plus ipilimumab as first-line therapy for primary tumors in patients with renal cell carcinoma

OBJECTIVES

With the emergence of several effective combination therapies, information on their effects at the primary site will be crucial for planning future cytoreductive nephrectomy (CN). The present study focused exclusively on changes in primary tumor sizes following treatment with nivolumab plus ipilimumab and investigated the clinical factors associated with a good response in primary tumors.

METHODS AND MATERIALS

We retrospectively assessed 27 patients diagnosed with advanced renal cell carcinoma (RCC) who started treatment with nivolumab plus ipilimumab. Changes in tumor sizes at the primary site were described using waterfall and spider plots, respectively. We analyzed the correlation of tumor shrinkage between primary and metastatic site. The parameters analyzed between responders and non-responders according to primary tumor sizes were International Metastatic Renal Cell Carcinoma Database Consortium (IMDC) risk scores, peripheral blood markers, and CRP.

RESULTS

The median age and follow-up period were 66 years and 9.3 months, respectively. The median IMDC risk score was 3 (range: 1-6). Nineteen patients were diagnosed with clear-cell RCC (ccRCC) and 8 patients with non-ccRCC. Among ccRCC patients, 9 (47.4%) achieved a significant response with a maximum reduction of 30% or more in the size of the primary tumor from baseline within 4 months, while 3 (37.5%) out of 8 patients with non-ccRCC achieved a significant response. Shrinkage of the primary tumor correlated with the metastatic tumors in both ccRCC and non-ccRCC cases. Of note, 6 patients underwent CN and no viable tumor cells were detected in the surgical specimens of 3 patients whose primary tumors shrank by approximately 50%-60% with a reduction to 4 cm or less. Among ccRCC patients, the neutrophil-to-lymphocyte ratio and monocyte-to-lymphocyte ratio were slightly lower in responders than in non-responders (P = 0.0944 and P = 0.0691). The platelet-to-lymphocyte ratio was significantly lower in responders than in non-responder (P = 0.0391).

CONCLUSIONS

Significant responses in primary tumors to nivolumab plus ipilimumab were observed in 50% of ccRCC patients, while responses varied among non-ccRCC patients. Inflammation markers may be predictive factors of treatment responses in primary tumors. Although further studies are needed, the present results suggest the importance of considering CN from radiological and pathological viewpoints.

Real-World Incidence of Immune-Related Adverse Events Associated with Nivolumab Plus Ipilimumab in Patients with Advanced Renal Cell Carcinoma: A Retrospective Observational Study

Real-world incidence of immune-related adverse events (irAEs) associated with nivolumab plus ipilimumab in patients with renal cell carcinoma (RCC) has been rarely demonstrated. The present study aims to report the safety outcomes of this combination therapy in the real-life population. We conducted a multi-institutional retrospective observational study that assessed the incidence and severity of irAEs associated with nivolumab plus ipilimumab in 41 Japanese patients with metastatic and/or locally advanced RCC. The irAEs were classified into endocrine and non-endocrine irAEs. The median age and follow-up period were 68 years and 13.0 months, respectively. Endocrine irAEs were observed in 66% of patients, including hypopituitarism in 44%, hyperthyroidism in 41%, and primary hypothyroidism in 22%, while non-endocrine irAEs were observed in 54%. All patients experiencing hypopituitarism presented with adrenocorticotropic hormone deficiency, causing secondary adrenal insufficiency, which required permanent corticosteroid replacement therapy. There was an association between the incidence of endocrine irAEs and high-grade non-endocrine irAEs other than skin-related irAEs (p = 0.027). When patients experienced two or more endocrine irAEs, they had a 35% chance of experiencing high-grade non-endocrine irAEs other than skin-related irAEs. Nivolumab plus ipilimumab may lead to a high prevalence of endocrine irAEs in “real-world” patients. Endocrine irAEs may be associated with non-endocrine irAEs other than skin-related irAEs.

Predictive Impact of Early Changes in Serum C-Reactive Protein Levels in Nivolumab Plus Ipilimumab Therapy for Metastatic Renal Cell Carcinoma

BACKGROUND

Serum C-reactive protein (CRP) is reportedly associated with metastatic renal cell carcinoma (mRCC) activity. However, in the era of immune checkpoint inhibitors, the predictive value of CRP is unclear. In this study, we investigated the predictive impact of pretreatment CRP levels and early changes in CRP levels for the treatment of mRCC with nivolumab plus ipilimumab (NIVO-IPI) therapy.

METHODS

Forty-eight patients with mRCC treated with NIVO-IPI as a first-line therapy were retrospectively analyzed. First, patients were divided into 2 groups: initial CRP ≥ 1.0 mg/dL and < 1.0 mg/dL. Progression-free survival (PFS) was compared between the 2 groups. Second, based on the CRP change within the first 3 months of NIVO-IPI, patients were placed in the normal group (CRP remains < 1.0 mg/dL), normalized group (CRP decreased < 1.0 mg/dL), and non-normalized group (CRP remained or increased to ≥ 1.0 mg/dL). The predictive association between CRP change and PFS was evaluated.

RESULTS

PFS was significantly lower in the high initial CRP group (n = 24, 50%) compared to the normal CRP group (n = 24, 50%) (median: 4.3 vs. 28.1 months, P = .03). As for the early CRP change, the normal (2.7 vs. 28.1, P = .0002) and normalized (2.7 vs. 11.0, P = .0094) groups showed significantly higher PFS, compared to the non-normalized group. Meanwhile, there was no significant difference between normal, and normalized groups (P = .51). The objective response rate was higher in the normal (57.1% vs. 18.7%, P = .015) and normalized (81.8 vs. 18.7%, P = .0008) groups, compared to the non-normalized group. Multivariate Cox regression analysis showed that normal [Hazard ratio (HR) = 0.15, 95% Confidence interval (CI) = 0.02-0.70, P = .026] and normalized (HR 0.21, 95% CI = 0.05-0.73, P = .015) CRP showed significant association with PFS.

CONCLUSION

In the NIVO-IPI therapy for mRCC, early changes in CRP could predict PFS. This data may be useful for the early detection of ineffective NIVO-IPI therapy and conversion to subsequent therapies.

Prognostic impact of immune-related adverse events in metastatic renal cell carcinoma treated with nivolumab plus ipilimumab

OBJECTIVES

Evidence regarding the prognostic impact of immune-related adverse events (irAEs) remains limited in patients with metastatic renal cell carcinoma (mRCC) treated with nivolumab plus ipilimumab as a first-line systemic therapy. Thus, we investigated the association between irAE development and oncological outcomes during nivolumab plus ipilimumab therapy.

METHODS

We retrospectively evaluated 46 patients with mRCC who were treated with nivolumab plus ipilimumab at our hospital and its affiliated institutions. The associations between irAE development and progression-free survival (PFS), overall survival (OS), and objective response rates (ORRs) were assessed after treatment initiation.

RESULTS

A total of 60 irAEs occurred in 33 patients (72%), with 24 grade ≥ 3 irAEs developed in 20 patients (43%). PFS was significantly longer in patients with irAEs than that in patients without irAEs (P < 0.0001); however, OS was not different (P = 0.571). Multivariable analysis further revealed that the development of irAEs was an independent predictor of a longer PFS (hazard ratio: 0.18, P = 0.0005). A landmark analysis for the initial four cycles of nivolumab plus ipilimumab administration also showed that PFS was significantly longer in patients with irAEs than that in patients without irAEs (P = 0.0386). The ORRs were also higher in patients with irAEs (P = 0.0064). Furthermore, in 22 patients (48%) who discontinued nivolumab plus ipilimumab treatment, the 6-month PFS rate was 87%.

CONCLUSION

This multi-institutional study showed that irAE development was significantly associated with PFS but not with OS in patients treated with nivolumab plus ipilimumab as a first-line therapy. The development of irAEs may be used as a surrogate prognostic marker for PFS in this treatment regimen.

Comparison of nivolumab plus ipilimumab with tyrosine kinase inhibitors as first-line therapies for metastatic renal-cell carcinoma: a multicenter retrospective study

BACKGROUND

This study compared real-world outcomes of metastatic renal-cell carcinoma (mRCC) patients treated with tyrosine kinase inhibitors or nivolumab plus ipilimumab.

METHODS

Using the International mRCC Database Consortium (IMDC), we retrospectively evaluated intermediate- and poor-risk mRCC patients who were treated with nivolumab plus ipilimumab (Nivo-Ipi), tyrosine kinase inhibitors (TKIs) as the first-line therapy between August 2015 and January 2020. We compared oncological outcomes between the Nivo-Ipi group and TKIs group using multivariate logistic regression analysis with the inverse probability of treatment weighting (IPTW) method.

RESULTS

In this study 278 patients were included. There were 52 and 226 patients in the Nivo-Ipi and TKIs groups (sunitinib 97, axitinib 118, sorafenib 9, pazopanib 2), respectively. The median age in the Nivo-Ipi and TKIs groups were 69 and 67 years, respectively. There was no significant difference in age, performance status, history of nephrectomy, and the IMDC risk group distribution between the groups. The objective response rate was significantly higher in the Nivo-Ipi group (38%) than in the TKIs group (23%, P = 0.018). The IPTW-adjusted Cox regression analysis showed that a significantly longer progression-free survival (hazard ratio 0.60, P = 0.039) and overall survival (hazard ratio 0.51, P = 0.037) rates in the Nivo-Ipi group than those in the TKIs group.

CONCLUSIONS

The oncological outcomes of patients receiving the first-line therapy of nivolumab plus ipilimumab in real-world practice were significantly improved in comparison with first-line TKIs therapy.