Corticosteroid-resistant immune-related adverse events: a systematic review

Immune checkpoint inhibitor (ICI) treatment has become an important therapeutic option for various cancer types. Although the treatment is effective, ICI can overstimulate the patient's immune system, leading to potentially severe immune-related adverse events (irAEs), including hepatitis, colitis, pneumonitis and myocarditis. The initial mainstay of treatments includes the administration of corticosteroids. There is little evidence how to treat steroid-resistant (sr) irAEs. It is mainly based on small case series or single case reports. This systematic review summarizes available evidence about sr-irAEs. We conducted a systematic literature search in PubMed. Additionally, we included European Society for Medical Oncology, Society for Immunotherapy of Cancer, National Comprehensive Cancer Network and American Society of Clinical Oncology Guidelines for irAEs in our assessment. The study population of all selected publications had to include patients with cancer who developed hepatitis, colitis, pneumonitis or myocarditis during or after an immunotherapy treatment and for whom corticosteroid therapy was not sufficient. Our literature search was not restricted to any specific cancer diagnosis. Case reports were also included. There is limited data regarding life-threatening sr-irAEs of colon/liver/lung/heart and the majority of publications are single case reports. Most publications investigated sr colitis (n=26), followed by hepatitis (n=21), pneumonitis (n=17) and myocarditis (n=15). There is most data for mycophenolate mofetil (MMF) to treat sr hepatitis and for infliximab, followed by vedolizumab, to treat sr colitis. Regarding sr pneumonitis there is most data for MMF and intravenous immunoglobulins (IVIG) while data regarding infliximab are conflicting. In sr myocarditis, most evidence is available for the use of abatacept or anti-thymocyte globulin (ATG) (both with or without MMF) or ruxolitinib with abatacept. This review highlights the need for prompt recognition and treatment of sr hepatitis, colitis, pneumonitis and myocarditis. Guideline recommendations for sr situations are not defined precisely. Based on our search, we recommend-as first line treatment-(1) MMF for sr hepatitis, (2) infliximab for sr colitis, followed by vedolizumab, (3) MMF and IVIG for sr pneumonitis and (4) abatacept or ATG (both with or without MMF) or ruxolitinib with abatacept for sr myocarditis. These additional immunosuppressive agents should be initiated promptly if there is no sufficient response to corticosteroids within 3 days.

Upfront Taxane Could Be Superior to Pegylated Liposomal Doxorubicin (PLD): A Retrospective Real-World Analysis of Treatment Sequence Taxane-PLD versus PLD-Taxane in Patients with Metastatic Breast Cancer

Background: Patients with endocrine-resistant metastatic breast cancer (MBC) require cytostatic therapy. Single-agent taxanes and anthracyclines, including pegylated liposomal doxorubicin (PLD), are standard treatment options. There are no prospective data regarding optimal treatment sequences, and real-world data regarding both treatment options are limited. Methods: We analyzed electronic records of all patients with Her2-negative MBC treated with either first-line PLD or first-line taxane and subsequent crossover at the University Hospital Basel between 2003 and 2021. The primary endpoint was time to next chemotherapy or death (TTNC). Secondary endpoints were overall survival (OS), progression-free survival (PFS), and objective response rate (ORR). We used the Kaplan-Meyer method and logrank test to compare time-to-event endpoints and the Fisher exact test to compare discrete variables. Results: We retrospectively identified 42 patients with Her2-negative MBC who have received either single-agent PLD or single-agent taxane as first-line chemotherapy with subsequent crossover, including 23 patients who received first-line PLD and 19 patients who received first-line taxane. Baseline characteristics were similar between treatment groups. Treatment sequence PLD-taxane was significantly inferior to taxane-PLD regarding all endpoints: median TTNC 4.9 vs. 9.9 months (p = 0.006), median OS 17.8 vs. 24.6 months (p = 0.05), median PFS 4.4 vs. 9.0 months (p = 0.005), and ORR 13% vs. 53% (p = 0.01). Conclusions: Here, we report a first retrospective head-to-head comparison of the treatment sequence PLD-taxane versus taxane-PLD in patients with MBC, showing a substantial advantage of using taxanes first, followed by PLD. An inherent treatment bias in favor of first-line taxanes cannot be excluded, thus calling for prospective validation.

Pegylated liposomal doxorubicin (PLD) in daily practice-A single center experience of treatment with PLD in patients with comorbidities and older patients with metastatic breast cancer

PURPOSE

Real-world data about pegylated liposomal doxorubicin (PLD) in patients with metastatic breast cancer (MBC) are limited. We have aimed to highlight the role of PLD in daily practice focusing on older patients and patients with comorbidities with MBC.

METHODS

We analyzed electronic records of all patients with advanced/metastatic breast cancer treated with single-agent PLD at the University Hospital Basel between 2003 and 2021. Primary endpoint was time to next chemotherapy or death (TTNC). Secondary endpoints were overall survival (OS), progression-free survival (PFS), and overall response rate (ORR). We performed univariate and multivariate analysis for clinical variables.

RESULTS

112 patients with MBC having received single-agent PLD in any treatment line were analyzed, including 34 patient who were older than 70 years and 61 patients with relevant comorbidities. Median TTNC, OS, and PFS for treatment with PLD were 4.6, 11.9, and 4.4 months, respectively. ORR was 13.6%. Age >70 years predicted shorter OS (median 11.2 months) in multivariate analysis (hazard ratio [HR] 1.83, 95% CI 1.07-3.11, p = 0.026). Age and comorbidities did not significantly affect other endpoints. Unexpectedly, hypertension predicted longer TTNC (8.3 months, p = 0.04) in univariate analysis, maintained in multivariate analysis as a trend for both TTNC (HR 0.62, p = 0.07) and OS (HR 0.63, p = 0.1).

CONCLUSION

Age predicted shorter OS significantly but median OS was not relevantly shorter in older patients. PLD remains a treatment option in patients with comorbidities and older patients with MBC. However, our real-world results of PLD appear underwhelming compared to relevant phase II trials through all age groups, pointing to an efficacy-effectiveness gap, possibly due to sampling bias.

Real-World Data of Combined Immunochemotherapy in Patients With Nonsquamous Advanced NSCLC. A Single-Center Retrospective Study

Introduction

On the basis of the landmark trial KEYNOTE-189 (KN-189), pembrolizumab plus chemotherapy has become the standard-of-care first-line treatment for patients with advanced nonsquamous NSCLC without oncogenic driver alterations.KN-189 included a selected patient population and lacks external validity. In clinical practice, many patients do not meet the inclusion criteria of KN-189, although they are treated accordingly. It is unknown whether these patients benefit equally as the trial population.

Methods

We retrospectively analyzed all patients with advanced nonsquamous NSCLC without targetable oncogenic alterations who received the KN-189 treatment regimen between April 2018 and May 2021 at the University Hospital Basel, Switzerland. Patients were grouped into those who retrospectively met the inclusion criteria of KN-189 (group A) and those who did not (group B). Outcome parameters included progression-free survival (PFS), overall survival (OS), and objective response rate. Multivariate subgroup analyses were performed.

Results

We identified 75 patients, including 29 patients in group A and 46 patients in group B. Median PFS was 9.2 and 4.6 months in group A and B, respectively (p = 0.12). Median OS was 16.5 and 6.5 months in group A and B, respectively (p = 0.11). Objective response rate was 59% in group A and 33% in group B (p = 0.03). Eastern Cooperative Oncology Group performance status greater than or equal to 2 and active infections were significantly associated with shorter PFS and OS.

Conclusions

We report real-world data for patients treated according to the KN-189 regimen with inferior outcomes in patients who did not meet the KN-189 inclusion criteria. Better treatment options for this vulnerable patient population are needed.

Much has changed in the last decade except overall survival: A Swiss single center analysis of treatment and survival in patients with stage IV non-small cell lung cancer

BACKGROUND

Molecular therapies for cancers with targetable driver mutations and immunotherapies have revolutionized treatment of non-small cell lung cancer (NSCLC) during the last decade. International treatment guidelines began integrating targeted therapies in 2009 and immunotherapies in 2015. The aim of this study was to examine whether the benefits described for these new therapies in pivotal phase III trials have been translated to a real world patient population.

PATIENTS AND METHODS

Data from all consecutive patients diagnosed with stage IV NSCLC diagnosed at a community hospital in Switzerland between 2007 and 2018 were analyzed. Three groups of patients were compared, namely patients diagnosed before 2009 (group 1), between 2009 and 2015 (introduction of targeted therapies, group 2) and after 2015 (introduction of immunotherapies, group 3). The primary outcome was overall survival (OS). Time to treatment failure was a secondary outcome. Both endpoints were estimated using the Kaplan Meyer method and compared by log-rank test.

RESULTS

408 patients were included. Patient characteristics were similar in the three groups. Median OS in groups 1, 2, and 3 was 9.8 (95% CI, 6.2 to 13.4), 9.9 (95% CI, 7.6 to 12.1) and 8.6 (95% CI, 6.6 to 10.5) months, respectively (p = 0.5). Across groups patients treated with targeted- and immunotherapies had a significantly better outcome than those treated with chemotherapy or best supportive care (p<0.001). Nevertheless, OS remained unchanged between groups despite adequate molecular testing and integration of targeted- and immunotherapies. Over time, the patient population got more morbid with respect to tumor burden (p = 0.02) and co-morbidities (p = 0.02).

CONCLUSIONS

While selected subgroups of patients may benefit from new therapies, outcome in this unselected population of patients with stage IV NSCLC treated in daily practice has not improved over the last decade.