Does using atezolizumab with more combination chemotherapy prolong survival in small cell lung cancer?

Year 2023, , 476 - 481, 30.09.2023

Bilgin Demir , Ömer Faruk Akgül , Ali Aytaç , Ayhan Açlan , Onur Yazdan Balçık , Mehmet Uzun , Esin Oktay

https://doi.org/10.18663/tjcl.1338507

Abstract

Aim: For nearly 50 years, the standard first-line treatment for small cell lung cancer (SCLC) has been platinum-based chemotherapy combined with etoposide regimen. The use of atezolizumab in combination with chemotherapy in the first-line treatment of extensive-stage SCLC has recently been shown to improve survival in a randomized trial. Patients with SCLC not treated with immunotherapy received standard 6 cycles of platinum-based chemotherapy with the most effective survival results, whereas in the randomized trial of atezolizumab, standard 4 cycles of chemotherapy were administered. This retrospective study aims to present real-life data of atezolizumab combined with 6 cycles of chemotherapy in the first-line treatment of extensive-stage SCLC.
Material and Methods: The study included patients diagnosed with disseminated SCLC in our clinic who received a minimum of 6 cycles of treatment with carboplatin-etoposide plus atezolizumab in the first-line induction phase. Patients who completed the induction phase received atezolizumab 1200 mg every 3 weeks in the maintenance phase. Patients who received less than 6 cycles of chemotherapy combined with atezolizumab in the induction phase and patients with missing laboratory data were excluded from the study. Characteristics of the patients, treatments administered, response rates and survival data were analyzed. Kaplan-Meier test was used to determine survival data and the effects of metastasis sites were analyzed using log-rank test.
Results: Twenty-four patients fulfilling the criteria were included. The median age was 64 years and two thirds had comorbid disease. The median number of chemotherapy cycles was 6 (6-12) and atezolizumab cycles was 8 (6-54). After a median follow-up of 9.4 months, the median progression-free survival (PFS) and overall survival (OS) were 9.5 months (95% CI 0.0-25.8) and 30.1 months (95% CI 3.26-57.004), respectively. The overall response rate was 87.5%. There was no significant difference between the number of metastatic sites (p = 0.77) and OS. Grade 3 side effects were observed in more than half of the patients. The most common side effects were hematological toxicities, and all toxicities were manageable.
Conclusion: These real-life data confirm the efficacy and safety of atezolizumab combined with at least six cycles of chemotherapy in the induction phase in the first-line treatment of extensive-stage SCLC.

Keywords

Atezolizumab, cancer, chemotherapy, immunotherapy, lung

Supporting Institution

HERHANGİ BİR DESTEKLEYEN KURUM YOKTUR

Thanks

DEĞERLENDİRMENİZ İÇİN TEŞEKKÜR EDERİM

Küçük hücreli akciğer kanserinde daha fazla kombine kemoterapi ile atezolizumab kullanımı sağkalımı uzatır mı?

Abstract

Amaç: Küçük hücreli akciğer kanserinde (KHAK) yaklaşık 50 yıldır standart birinci basamak tedavi platin bazlı kemoterapi ile kombine etoposid rejimidir. Atezolizumabın yaygın evre KHAK birinci basamak tedavisinde kemoterapi ile kombine kullanımı yakın zamandan sağkalımı iyileştirdiği randomize bir çalışmada gösterilmiştir. Immunoterapi tedavisi uygulanmayan KHAK’li hastalara standart 6 kür platin bazlı kemoterapi uygulanarak en etkili sağkalım sonuçlarına ulaşılırken, atezolizumabın randomize çalışmasında standart 4 kür kemoterapi uygulanmıştır. Bu retrospektif çalışma, yaygın evre KHAK birinci basamak tedavisinde 6 kür kemoterapi ile kombine atezolizumabın gerçek yaşam verilerini sunmayı amaçlamaktadır.
Gereçler ve Yöntemler: Çalışmaya kliniğimizdeki yaygın evre KHAK tanılı ve birinci basamak indüksiyon fazında karboplatin-etoposid artı atezolizumab ile kombine minimum 6 siklus tedavi alan hastalar dahil edildi. İndüksiyon fazı tamamlanan hastalara idame fazında atezolizumab 1200 mg 3 haftada bir uygulandı. İndüksiyon fazında 6 siklus atezolizumab ile kombine kemoterapiden az tedavi alan hastalar ile laboratuvar verileri eksik olan hastalar çalışma dışı bırakıldı. Hastaların özellikleri, uygulanan tedaviler ve tedaviye yanıt oranları ile sağ kalım verileri incelendi. Sağkalımı verilerini belirlemek için Kaplan-Meier testi kullanıldı ve metastaz bölgelerinin etkileri log-rank testi kullanılarak analiz edildi.
Bulgular: Kriterleri karşılayan 24 hasta dahil edildi. Ortanca yaş 64 idi ve üçte ikisinde komorbid hastalık vardı. Medyan kemoterapi döngüsü sayısı 6 (6-12) ve atezolizumab döngüsü 8 (6-54) idi. Medyan 9,4 aylık takipten sonra medyan progresyonsuz sağkalım (PFS) ve genel sağkalım (OS) sırasıyla 9.5 ay (%95 GA 0.0-25.8) ve 30,1 aydı (%95 GA 3.26-57.004). Genel yanıt oranı %87.5 idi. Metastatik bölge sayısı (p = 0.77) ile OS arasında anlamlı bir fark bulunamadı. Hastaların yarısından fazlasında derece 3 yan etki gözlendi. En sık yan etkiler hematolojikdi ve toksisiteler yönetilebilirdi.
Sonuç: Bu gerçek yaşam verileri, yaygın evre KHAK birinci basamak tedavisinde indüksiyon fazında en az altı siklus kemoterapi ile kombine atezolizumab etkiliğini ve güvenliliğini doğrulamaktadır.

Keywords

Atezolizumab, kanser, kemoterapi, immünoterapi, akciğer

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