Pharmacological interventions for melanoma: Comparative analysis using bayesian meta-analysis

Efficacy and safety of nivolumab in combination with ipilimumab in Japanese patients with advanced melanoma: An open-label, single-arm, multicentre phase II study

AIM

The aim of the study was to evaluate the efficacy and safety of nivolumab combined with ipilimumab in treatment-naïve Japanese patients with advanced melanoma.

METHODS

In this multicentre, single-arm study, treatment-naïve Japanese patients with unresectable stage III/IV or recurrent melanoma received nivolumab (1 mg/kg) plus ipilimumab (3 mg/kg) every 3 weeks for four doses, followed by biweekly doses of nivolumab (3 mg/kg). The primary end-point was centrally assessed objective response rate (ORR). Secondary end-points included overall survival (OS), progression-free survival (PFS), disease control rate and safety.

RESULTS

The subtypes of the thirty patients enrolled were: 12, mucosal; eight, non-acral cutaneous; seven, acral; two, uveal and one, unknown primary melanoma. The ORR was 43.3% (95% confidence interval [CI]: 25.5, 62.6) with central and local assessment. The centrally and locally assessed disease control rate (95% CI) were 73.3% (54.1, 87.7) and 86.7% (69.3, 96.2), respectively. At the median follow-up period of 14.1 months (range 5.2-27.7), median OS and centrally assessed PFS were not reached. OS (95% CI) at 6, 12, 18 and 24 months was 93.3% (75.9, 98.3), 83.3% (64.5, 92.7), 72.9% (50.0, 86.5) and 65.6% (40.4, 82.2), respectively. Treatment-related adverse events (AEs) occurred in all patients. Grade III-IV and serious AEs occurred, mostly during the combination phase, in 23 (76.7%) and 20 (66.7%) patients, respectively. No treatment-related deaths occurred.

CONCLUSIONS

This study confirmed the efficacy and safety of nivolumab plus ipilimumab in treatment-naïve Japanese patients with advanced melanoma including rare subtypes. Incidence rates for grade III-IV AEs were high but manageable with appropriate medical attention and treatment.

TRIAL REGISTRATION

JapicCTI-152869.

Gastrointestinal adverse events with combination of checkpoint inhibitors in advanced melanoma: a systematic review

INTRODUCTION

Immunotherapies, including checkpoint inhibitors (CIs) such as cytotoxic T-lymphocyte antigen-4 (CTLA-4) and programmed death-1 (PD-1) inhibitors, are revolutionizing the treatment of advanced melanoma. Combining CTLA-4 and PD-1 inhibitors provides additional clinical benefit compared with single agents alone. However, combination therapy can increase the incidence of gastrointestinal adverse events (GI AEs). This systematic review assessed the epidemiological, clinical, economic, and humanistic burden of GI AEs due to combination CIs in advanced melanoma.

METHODS

MEDLINE, EMBASE, and the Cochrane Library were systematically searched (December 2011 to December 2016) to identify primary studies, systematic reviews, meta-analyses, and conference proceedings (2014-2016) evaluating adults treated with ≥2 CIs for advanced melanoma.

RESULTS

Of the 3391 identified articles, 14 were included. Most studies examined the ipilimumab plus nivolumab combination. Any grade and grade 3-4 GI AEs occurred in more patients receiving ipilimumab plus nivolumab versus ipilimumab or nivolumab alone. The most common grade 3-4 GI AEs were diarrhea and colitis. Grade 3-4 colitis occurred in more patients receiving ipilimumab plus nivolumab. However, grade 3-4 diarrhea occurred at the same rate as ipilimumab alone. GI AEs developed with ipilimumab plus nivolumab approximately 6.6 weeks after initiating treatment. No studies assessing the economic or humanistic burden of GI AEs were identified.

CONCLUSION

GI AEs occurred at a higher rate and greater severity in patients treated with ipilimumab plus nivolumab versus ipilimumab or nivolumab monotherapy. The lack of research on economic and humanistic burden of GI AEs with combination CIs for advanced melanoma represents an unmet need in the literature and should be explored in future studies.