Real-world data of atezolizumab in patients with previously treated locally advanced or metastatic urothelial bladder cancer

BACKGROUND

Clinical trials of atezolizumab for locally advanced or metastatic urothelial bladder cancer (mUBC) report controversial efficacy data. Furthermore, real-world evidence about this use is limited.

AIM

We aimed to evaluate the effectiveness of atezolizumab in a real-world population with mUBC, to explore effectiveness with regard to selected poor prognostic criteria such as performance status by Eastern Oncology Cooperative Group (ECOG), hemoglobin levels and liver metastases, and to determine the safety profile of atezolizumab.

METHOD

Multicenter, retrospective real-world study including previously treated mUBC patients who received atezolizumab. The primary endpoint was overall survival (OS). Additionally, progression-free survival (PFS), best response reached and safety data were analyzed. A descriptive analysis was performed, while OS and PFS were estimated by Kaplan-Meier method.

RESULTS

A total of 185 patients (84.9% men, median age 69 years) were included. Median PFS was 4.8 months [95% confidence interval (CI) 3.6-6.0], and median OS was 20.0 months (95% CI 11.8-28.5), with an objective response rate of 28.1%. OS was higher for patients with ECOG 0-1 versus 2-3 [24.5 months (95% CI 14.5-34.6) vs. 5.2 (95% CI 4.4-6.0), p = 0.004]; and for patients without liver metastases [25.4 months (95% CI 16.2-34.6) vs. 6.4 months (95% CI 4.0-8.1), p = 0.006]. Regarding hemoglobin levels, no survival differences were detected. Adverse events were registered in 55.1% of patients.

CONCLUSION

In a real-world population with previously treated mUBC, atezolizumab seems to provide clinically relevant benefit, which is even higher for patients with ECOG 0-1 and without liver metastases, with an acceptable safety profile.

Indirect comparison of anti-interleukin 17 targeted biological treatments for moderate-to-severe psoriasis

WHAT IS KNOWN AND OBJECTIVE

Psoriasis is an inflammatory skin disease with an important disease burden worldwide and its treatment includes systemic therapies which have advanced over time to target specific immune cytokines such as interleukin-17. The main objective of this study was to compare the relative efficacy of brodalumab, ixekizumab and secukinumab (three anti-interleukin-17 drugs) through adjusted indirect treatment comparisons (ITCs).

METHODS

A search was carried out in June 2019, consulting these databases: MEDLINE, EMBASE, Web of Science and the Cochrane Library. Studies including patients with moderate to severe psoriasis randomized to receive treatment with anti-interleukin-17 drugs or ustekinumab and with outcomes such as Psoriasis Area and Severity Index (PASI) 75, PASI 90 and PASI 100 scores or static Physician's Global Assessment (sPGA), were included. ITCs were carried out using the method proposed by Bucher et al RESULTS AND DISCUSSION: Five randomized clinical trials were included. Analysing short-term data, there were no statistically significant differences between any pair of drugs in terms of PASI 75, PASI 100 or sPGA/sIGA 0/1. Analysing long-term data, statistically significant differences were only observed for secukinumab versus brodalumab in terms of PASI 100 (Absolute risk reduction -12.9%; 95% confidence interval -22.7% to -3.1%).

WHAT IS NEW AND CONCLUSION

The ITCs indicated no efficacy differences between anti-interleukin-17 drugs, except for secukinumab versus brodalumab 52-week analysis in terms of achieving PASI 100. All three drugs appear to act as equivalent clinical treatments for psoriasis. However, independent head-to-head trials should be carried out.