Purpose
Immune checkpoint inhibitors (ICIs) have become a standard therapy for metastatic hepatocellular carcinoma (HCC), often as an alternative to tyrosine kinase inhibitors (TKIs). However, safety data combining ICIs with stereotactic ablative radiotherapy (SABR) remain limited. We compared the safety and efficacy of SABR combined with ICIs versus TKIs in patients with extrahepatic metastatic HCC.
Materials and methods
This single-center retrospective study included patients with HCC who received SABR for extrahepatic metastases combined with either TKIs or ICIs within 30 days of SABR between January 2010 and June 2024. Adverse events (AEs; CTCAE v5.0) and oncologic outcomes were evaluated using logistic regression and Cox models.
Results
Among 103 patients with 128 SABR-treated lesions, 72 patients (90 lesions) received SABR+TKI and 31 patients (38 lesions) received SABR+ICI. Acute AEs occurred only in the SABR+TKI group (8.9%), predominantly grade 1. Grade 3 late AEs were rare, occurring in one case in each group, while late AEs of lower grades were more frequent with SABR+ICI (any-grade: 57.9% vs. 25.6%, p<0.001; grade ≥2: 23.7% vs. 8.9%, p=0.024). Multivariable analysis showed borderline increased risk of grade ≥2 late AEs with SABR+ICI (p=0.052). One-year local control, progression-free survival, and overall survival were 76.6%, 35.3%, and 72.3% respectively, with no significant differences between groups.
Conclusion
Metastasis-directed SABR combined with either TKIs or ICIs was generally well tolerated in patients with extrahepatic metastatic HCC, with rare grade 3 late AEs; grade ≥2 late AEs were more frequent with SABR plus ICIs, warranting prospective evaluation.
Purpose
Immune checkpoint inhibitors (ICIs) offer durable responses in lung cancer patients lacking actionable mutations or with resistance to prior therapies. However, predicting their efficacy and associated immune-related adverse events (irAEs), such as severe pneumonitis, remains a clinical challenge. This study investigated the predictive value of positron emission tomography/computed tomography (PET/CT)-derived metabolic parameters for pneumonitis and other irAEs in lung cancer patients treated with ICIs.
Materials and Methods
We retrospectively analyzed 151 patients with advanced non-small cell lung cancer (NSCLC) who received ICIs as first-line treatment, either as monotherapy or in combination. Pre-treatment PET/CT was used to measure SUVmax at the primary tumor, tumor-uninvolved peripheral lung, and metastatic sites. Pneumonitis and irAEs were assessed using clinical and radiological findings.
Results
Pneumonitis, severe pneumonitis (grade ≥3), and irAEs occurred in 26.5%, 19.9%, and 37.1% of patients, respectively. A peripheral SUVmax cutoff of >1.1 significantly predicted pneumonitis (area under the curve [AUC] = 0.720, p <0.001). High peripheral SUVmax was associated with higher rates of pneumonitis (42.9% vs. 12.3%, p <0.001), severe pneumonitis (31.4% vs. 9.9%, p=0.001), and irAEs (46.4% vs. 29.5%, p=0.038). In multivariate analysis, high peripheral SUVmax independently predicted pneumonitis (odds ratio [OR]: 4.621; 95% confidence interval [CI]: 1.868–11.431; p=0.001), severe pneumonitis (OR: 2.848; 95% CI: 1.043–7.779; p=0.041), and irAEs (OR: 2.509; 95% CI: 1.114–5.504; p=0.022).
Conclusion
Baseline peripheral SUVmax on PET/CT may serve as a noninvasive biomarker for predicting immune-related pneumonitis and other irAEs in NSCLC patients receiving ICIs, supporting early risk identification.
Purpose
As immunotherapy has become essential in the treatment of gastric cancer (GC), there has been growing interest in T-cells, which play a key role in immunotherapy. In this study, we evaluated the impact of T-cell subsets on immune responsiveness to immune checkpoint inhibitors (ICIs) in GC using multiplex immunohistochemistry (mIHC).
Materials and Methods
Eighty-four GC patients treated with ICIs were enrolled, and we repeated the staining-scanning-stripping procedure nine times to assess different kinds of T-cells or cell-surface immune checkpoints in a single tissue section.
Results
The proportions of patients with microsatellite instability-high (MSI-H), Epstein-Barr virus (EBV), and non-MSI/non-EBV were 8.3%, 3.6% and 88.1%. A high cytotoxic T-cell (Tcyto) density was related to longer overall survival (OS). GC with a high ratio of Tcyto/total T-cells (Ttotal) and a low ratio of regulatory T-cells (Treg)/Ttotal showed better OS. A high density of PD-1- or TIM-3- expressing Tcyto were also associated with longer OS than a low density of those. Among memory T-cells (Tmem) subsets, GC with a high ratio of memory Tcyto/Tmem and a low ratio of memory Treg/Tmem showed prolonged OS. Better tumor responses were observed in GC with a high ratio of Tcyto/Ttotal and memory Tcyto/Tmem.
Conclusion
T-cell subsets within the tumor microenvironment were associated with the clinical efficacy of ICIs in GC. PD-1- or TIM-3 expressing T-cells were also associated with response to ICIs, while memory T-cells subsets were associated with survival. mIHC is a feasible method for evaluating T-cell subsets in archival gastric tumor tissue.
Jeong hwan Lee, Nayoung Kim, Ji-Hyun Kim, Hyeon Jeong Oh, Yeejin Kim, Yonghoon Choi, Hyemin Jo, Ho-Kyoung Lee, Jinju Choi, Yu Kyung Jun, Hyuk Yoon, Cheol Min Shin, Young Soo Park, Dong Ho Lee, Hye Seung Lee, So Hyun Kang, Young Suk Park, Sang-Hoon Ahn, Yun-Suhk Suh, Do Joong Park, Hyung Ho Kim, Ji-Won Kim, Jin Won Kim, Keun-Wook Lee, Won Chang, Yoon Jin Lee, Kyoung Ho Lee, Young Hoon Kim, Soyeon Ahn
Received January 31, 2025 Accepted August 5, 2025 Published online August 13, 2025
Purpose Programmed cell death ligand-1 (PD-L1) negatively regulates T-cell activation, and exhibits sex-based differences in expression and immune responses. This study investigated sex-related differences in clinicopathological factors influencing PD-L1 expression and the effect of immune checkpoint inhibitors (ICIs) on survival in gastric cancer (GC) patients in South Korea.
Materials and Methods We analyzed a prospective cohort of 468 GC patients who underwent PD-L1 immunohistochemistry. Age, tumor characteristics, molecular features, and survival outcomes were compared by sex. Multivariate analyses, including Cox proportional hazards modeling with an interaction term for sex, were performed.
Results Among 468 patients, 280 (59.8%) were PD-L1 positive. In the overall cohort, PD-L1 positivity was significantly associated with Epstein-Barr virus (EBV) infection (odds ratio [OR], 7.46; p < 0.001), antral location of GC (OR, 1.84; p=0.027), and macrosatellite instability–high (MSI-H) (OR, 5.04; p=0.027). Diffuse-type histology was inversely associated (OR, 0.22; p=0.041). In males, EBV (OR, 36.27) and antral location (OR, 2.38) were significant. In females, only MSI-H was significant (OR, 11.63). ICI-containing therapy significantly improved survival in males (p=0.012) but not in females (p=0.415). Cox regression showed a survival benefit from ICIs (hazard ratio, 0.70; p=0.080), with a borderline-significant interaction by sex (p=0.073).
Conclusion PD-L1 expression and therapeutic efficacy of ICIs differ by sex in GC. EBV infection and antral tumor location were independent factors in males, while MSI-H status was significant in females. These findings highlight the importance of sex-based immunobiology in tailoring GC treatment strategies.
Won-Jung Jung, Eun-Jung Jo, Ye-Jee Kim, Mihyun Park, Eunji Kim, Yu-Seon Jung, Sook Ryun Park, Ji Seon Oh, So-Hui Kim, Jeongbin Park, Sun-Young Jung, Nakyung Jeon
Received January 9, 2025 Accepted July 17, 2025 Published online July 18, 2025
Purpose This study estimated the incidence of immune checkpoint inhibitor–related hepatotoxicity (ICH), identified risk factors, and characterized patients who developed ICH.
Materials and Methods Adult patients treated with immune checkpoint inhibitors (ICIs) from January 2015 to June 2022 in a tertiary hospital were included, excluding those without liver function tests or those with liver cancer but normal baseline liver function. Patients were stratified by baseline liver function status; in overall and each of stratified cohorts ICH incidence was calculated as the number of events per 100 person-years with grade 3 hepatotoxicity as the primary outcome. Patient characteristics were assessed using descriptive statistics, and risk factors were identified through multivariable Cox regression. Causality between ICI use and hepatotoxicity was assessed using the Naranjo Algorithm.
Results Among 803 patients, the ICH incidence was 19.5 cases per 100 person-years, with a higher incidence (47.3 vs. 9.3 cases per 100 person-years) and earlier onset (13 vs. 15 days) in the abnormal compared to the normal group. Significant risk factors for ICH included female sex in the normal group and liver cancer in the abnormal group. According to the Naranjo Algorithm, all the 60 ICH cases were classified as “probable” or “possible”. Among the 60 cases, 61.7% (n=37) resulted in ICI discontinuation. The baseline liver function did not impact on the severity or the likelihood of ICI discontinuation.
Conclusion Future studies are needed to evaluate whether the impact of ICI discontinuation on survival outcomes in patients with ICH varies based on baseline liver function abnormalities.
Citations
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Integrative multi-omics profiling identifies infiltrative hepatocellular carcinoma as an immunotherapy-resistant subtype with distinct molecular features Won Suk Lee, Seonjeong Woo, Sung Hwan Lee, Gae Hoon Jo, Ilhwan Kim, Hyeyeong Kim, Chansik An, Sanghoon Jung, Gwangil Kim, Haeyoun Kang, Beodeul Kang, Jung Sun Kim, Ho Yeong Lim, Incheon Kang, Hannah Yang, So Jung Kong, Dahyeon Son, Dong Jun Shin, Woo Youn Clinical and Molecular Hepatology.2026; 32(1): 258. CrossRef
Purpose
Ovarian cancer presents significant treatment challenges due to its aggressive nature and poor response to immune checkpoint inhibitors (ICIs). The lack of standardized programmed cell death-ligand 1 (PD-L1) assays and cut-off values complicates clinical decision-making. We evaluated the concordance among commonly used PD-L1 assays and assessed changes in the expression of PD-L1 following chemotherapy.
Materials and Methods
Tissue samples from 29 patients with ovarian cancer were analyzed using five validated PD-L1 immunohistochemistry assays: Dako 22C3, Ventana SP263, Ventana SP142, Dako 28-8, and Ventana 22C3. PD-L1 positivity was assessed using a combined positive score (CPS), immune cell, or tumor proportion score at 1%, 5%, and 10% cut-offs. Concordance rates, including overall percent agreement and Cohen’s kappa coefficient, were analyzed. In addition, changes in the expression of PD-L1 pre- and postchemotherapy were evaluated.
Results
Positivity rates ranged from 15.8% (SP142) to 29.8% (Dako 22C3 and SP263) at the 1% CPS cut-off. SP142 consistently exhibited the lowest concordance, whereas Dako 22C3 displayed high agreement with SP263, 28-8, and Ventana 22C3. Chemotherapy increased PD-L1 positivity, with 28% of patients converting from negative to positive.
Conclusion
The expression of PD-L1 in ovarian cancer varies across assays and scoring methods, emphasizing the need for standardized testing protocols. Increased PD-L1 expression post-chemotherapy underscores the importance of assessing its status at appropriate times to guide ICI therapy. Larger studies are required to validate these findings and refine clinical applications.
Purpose Sarcopenia is a poor prognostic factor in non–small cell lung cancer (NSCLC). However, its prognostic significance in patients with NSCLC receiving immune checkpoint inhibitors (ICIs) and its relationship with lymphopenia remain unclear. We aimed to investigate the prognostic role of sarcopenia and its effect on lymphocyte recovery in patients with stage III NSCLC treated with concurrent chemoradiotherapy (CCRT) followed by ICI.
Materials and Methods We retrospectively evaluated 151 patients with stage III NSCLC who received definitive CCRT followed by maintenance ICI between January 2016 and June 2022. Sarcopenia was evaluated by measuring the skeletal muscle area at the L3 vertebra level using computed tomography scans. Lymphocyte level changes were assessed based on measurements taken before and during CCRT and at 1, 2, 3, 6, and 12 months post-CCRT completion.
Results Even after adjusting for baseline absolute lymphocyte count through propensity score-matching, patients with pre-radiotherapy (RT) sarcopenia (n=86) exhibited poor lymphocyte recovery and a significantly high incidence of grade ≥ 3 lymphopenia during CCRT. Pre-RT sarcopenia and grade ≥ 3 lymphopenia during CCRT emerged as prognostic factors for overall survival and progression-free survival, respectively. Concurrent chemotherapy dose adjustments, objective response after CCRT, and discontinuation of maintenance ICI were also analyzed as independent prognostic factors.
Conclusion Our results demonstrated an association between pre-RT sarcopenia and poor survival, concurrent chemotherapy dose adjustments, and impaired lymphocyte recovery after definitive CCRT. Moreover, CCRT-induced lymphopenia not only contributed to poor prognosis but may have also impaired the therapeutic efficacy of subsequent maintenance ICI, ultimately worsening treatment outcomes.
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Purpose Some studies suggest that TP53 mutations are associated with the response to immune checkpoint inhibitors (ICI) in patients with non–small cell lung cancer (NSCLC) and also contribute to sex disparities in several cancers. Thus, we hypothesized that TP53 mutations might serve as sex-dependent genomic biomarkers of ICI treatment response in patients with NSCLC.
Materials and Methods Clinical data of 100 patients with metastatic NSCLC treated with ICI monotherapy at Seoul National University Bundang Hospital (SNUBH) were retrospectively reviewed. Genomic and clinical datasets of The Cancer Genome Atlas and an ICI-treated lung cancer cohort (cBioPortal) were also analyzed.
Results In SNUBH cohort, no statistically significant difference was observed in the median progression-free survival (PFS) according to TP53 mutation status (p=0.930); however, female patients with TP53 mutations (MT) had a significantly prolonged median PFS compared to wild-type (WT) (6.1 months in TP53 MT vs. 2.6 months in TP53 WT; p=0.021). Programmed death-ligand 1 (PD-L1) high (≥ 50%) expression was significantly enriched in female patients with TP53 MT (p=0.005). The analysis from publicly available dataset also revealed that females with NSCLC with TP53 MT showed significantly longer PFS than those with TP53 WT (p < 0.001). In The Cancer Genome Atlas analysis, expression of immune-related genes, and tumor mutation burden score in TP53 MT females were higher than in males without TP53 MT.
Conclusion Female patients with NSCLC with TP53 mutations had high PD-L1 expression and showed favorable clinical outcomes following ICI therapy, suggesting a need for further research to explore the role of TP53 mutations for sex disparities in response to ICI therapy.
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Purpose Even though pazopanib, a multitargeted tyrosine kinase inhibitor, has been approved for refractory soft tissue sarcoma (STS), little is known about the molecular determinants of the response to pazopanib. We performed integrative molecular characterization to identify potential predictors of pazopanib efficacy.
Materials and Methods We obtained fresh pre-treatment tumor tissue from 35 patients with advanced STS receiving pazopanib-based treatment. Among those, 18 (51.4%) received pazopanib monotherapy, and the remaining 17 (48.6%) received pazopanib in combination with durvalumab, programmed death-ligand 1 blockade. Whole-exome and transcriptome sequencing were performed for each tumor and patient germline DNA.
Results Of the 35 patients receiving pazopanib-based treatment, nine achieved a partial response (PR), resulting in an objective response rate (ORR) of 27.3%, and the median progression-free survival (PFS) was 6.0 months. Patients with CDK4 amplification (copy ratio tumor to normal > 2) exhibited shorter PFS (3.7 vs. 7.9 months, p=2.09×10–4) and a poorer response (ORR; 0% vs. 33.3%) compared to those without a gene amplification (copy ratio ≤ 2). Moreover, non-responders demonstrated transcriptional activation of CDK4 via DNA amplification, resulting in cell cycle activation. In the durvalumab combination cohort, seven of the 17 patients (41.2%) achieved a PR, and gene expression analysis revealed that durvalumab responders exhibited high immune/stromal cell infiltration, mainly comprising natural killer cells, compared to non-responders as well as increased expression of CD19, a B-cell marker.
Conclusion Despite the limitation of heterogeneity in the study population and treatment, we identified possible molecular predictors of pazopanib efficacy that can be employed in future clinical trials aimed at evaluating therapeutic strategies.
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Purpose Appropriate preclinical mouse models are needed to evaluate the response to immunotherapeutic agents. Immunocompetent mouse models have rarely been reported for gastric cancer. Thus, we investigated immunophenotypes and responses to immune checkpoint inhibitor (ICI) in immunocompetent mouse models using various murine gastric cancer cell lines.
Materials and Methods We constructed subcutaneous syngeneic tumors with murine gastric cancer cell lines, YTN3 and YTN16, in C57BL/6J mice. Mice were intraperitoneally treated with IgG isotype control or an anti–programmed death-ligand 1 (PD-L1) neutralizing antibody. We used immunohistochemistry to evaluate the tumor-infiltrating immune cells of formalin-fixed paraffin-embedded mouse tumor tissues. We compared the protein and RNA expression between YTN3 and YTN16 cell lines using a mouse cytokine array and RNA sequencing.
Results The mouse tumors revealed distinct histological and molecular characteristics. YTN16 cells showed upregulation of genes and proteins related to immunosuppression, such as Ccl2 (CCL2) and Csf1 (M-CSF). Macrophages and exhausted T cells were more enriched in YTN16 tumors than in YTN3 tumors. Several YTN3 tumors were completely regressed by the PD-L1 inhibitor, whereas YTN16 tumors were unaffected. Although treatment with a PD-L1 inhibitor increased infiltration of T cells in both the tumors, the proportion of exhausted immune cells did not decrease in the non-responder group.
Conclusion We confirmed the histological and molecular features of cancer cells with various responses to ICI. Our models can be used in preclinical research on ICI resistance mechanisms to enhance clinical efficacy.
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Purpose
Recent clinical trials have reported response rates < 50% among patients treated with programmed death-1 (PD-1)/programmed death-ligand 1 (PD-L1) inhibitors for microsatellite instability‒high (MSI-H) colorectal cancer (CRC), and factors predicting treatment response have not been fully identified. This study aimed to identify potential biomarkers of PD-1/PD-L1 inhibitor treatment response among patients with MSI-H CRC.
Materials and Methods
MSI-H CRC patients enrolled in three clinical trials of PD-1/PD-L1 blockade at Asan Medical Center (Seoul, Republic of Korea) were screened and classified into two groups according to treatment response. Their histopathologic features and expression of 730 immune-related genes from the NanoString platform were evaluated, and a machine learning–based classification model was built to predict treatment response among MSI-H CRCs patients.
Results
A total of 27 patients (15 responders, 12 non-responders) were included. A high degree of lymphocytic/neutrophilic infiltration and an expansile tumor border were associated with treatment response and prolonged progression-free survival (PFS), while mucinous/signet-ring cell carcinoma was associated with a lack of treatment response and short PFS. Gene expression profiles revealed that the interferon-γ response pathway was enriched in the responder group. Of the top eight differentially expressed immune-related genes, PRAME had the highest fold change in the responder group. Higher expression of PRAME was independently associated with better PFS along with histologic subtypes in the multivariate analysis. The classification model using these genes showed good performance for predicting treatment response.
Conclusion
We identified histologic and immune-related gene expression characteristics associated with treatment response in MSI-H CRC, which may contribute to optimal patient stratification.
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Purpose
This study was to investigate the frequency of mismatch repair deficiency/high microsatellite instability (MMRd/MSI-H) in gynecologic malignancies and the efficacy of immune checkpoint inhibitors (ICIs) in patients with recurrent gynecologic cancers according to MMR/MSI status.
Materials and Methods
We conducted a multi-center retrospective review on the patients who were diagnosed with gynecologic cancers between 2015 and 2020. Their clinicopathologic information, results of immunohistochemistry staining for MLH1/MSH2/MSH6/PMS2 and MSI analysis, tumor response to treatment with ICIs were investigated.
Results
Among 1,093 patients included in the analysis, MMRd/MSI-H was most frequent in endometrial/uterine cancers (34.8%, 164/471), followed by ovarian, tubal, and peritoneal cancers (12.8%, 54/422) and cervical cancer (11.3%, 21/186). When assessed by histology without regard for cancer types, the frequency of MMRd/MSI-H was 11.0% (38/345) in high-grade serous adenocarcinoma, 38.6% (117/303) in endometrioid adenocarcinoma, and 30.2% (16/53) in carcinosarcoma. A total of 114 patients were treated with ICIs at least once. The objective response rate (ORR) was 21.6% (8/37) in cervical cancer, 4.7% (2/43) in ovarian cancer, and 25.8% (8/31) in endometrial/uterine cancers. Univariate regression analysis identified MMRd/MSI-H as the only significant factor associated with the ORR (28.9% [11/38] vs. 11.8% [9/76]; odds ratio, 3.033; 95% confidence interval, 1.129–8.144; p=0.028).
Conclusion
The frequency of MMRd/MSI-H is moderate to high in gynecologic cancers in the Korean population. MMRd/MSI-H could be effective predictive biomarkers in gynecologic cancers of any type.
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Results Nine eligible phase III randomized controlled trials were included, including 1,141 patients with liver metastases. Pembrolizumab+chemotherapy ranked highest, followed by atezolizumab+bevacizumab+chemotherapy and nivolumab. However, no significant difference in OS rates was observed across these three treatments (HR, 0.98; 95% confidence interval [CI], 0.43 to 2.22 for pembrolizumab+chemotherapy vs. atezolizumab+bevacizumab+chemotherapy; HR, 0.91; 95% CI, 0.52 to 1.57 for pembrolizumab+chemotherapy vs. nivolumab). Regarding the PFS rate, atezolizumab+bevacizumab+chemotherapy and pembro-lizumab+chemotherapy ranked highest and no significant difference was observed between them (HR, 0.79; 95% CI, 0.36 to 1.70 for atezolizumab+bevacizumab+chemotherapy vs. pembrolizumab+chemotherapy).
Conclusion Pembrolizumab+chemotherapy, atezolizumab+bevacizumab+chemotherapy, and nivolumab were superior to other treatments in NSCLC patients with liver metastases. These new findings may help clinicians better select therapeutic strategies for NSCLC patients with liver metastases.
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Materials and Methods This retrospective cohort study included 30 patients with NSCLC who received immune checkpoint inhibitors (ICI) therapy at the Seoul National University Bundang Hospital. programmed cell death-ligand-1 (PD-L1) protein expression was assessed using immunohistochemistry, and TMB was measured by targeted deep sequencing. Gene expression was determined using NanoString nCounter analysis for the PanCancer IO360 panel, and enrichment analysis were performed.
Results Eleven patients (36.7%) showed a durable clinical benefit (DCB), whereas 19 (63.3%) showed no durable benefit (NDB). TMB and enrichment scores (ES) showed significant differences between the DCB and NDB groups (p=0.044 and p=0.017, respectively); however, no significant correlations were observed among TMB, ES, and PD-L1. ES was the best single biomarker for predicting DCB (area under the curve [AUC], 0.794), followed by TMB (AUC, 0.679) and PD-L1 (AUC, 0.622). TMB and ES showed the highest AUC (0.837) among other combinations (AUC [TMB and PD-L1], 0.777; AUC [PD-L1 and ES], 0.763) and was similar to that of all biomarkers used together (0.832).
Conclusion The combination of TMB and ES may be an effective predictive tool to identify patients with NSCLC patients who would possibly benefit from ICI therapies.
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Purpose
The objective of this study was to describe and analyze the clinicopathological features of primary choriocarcinoma (PCC) observed in male patients treated at the Samsung Medical Center between 1996 and 2020.
Materials and Methods
We reviewed the clinical records of 14 male patients with PCC retrospectively to assess their demographic, histological, and clinical characteristics at the time of diagnosis as well as identify the treatment outcomes.
Results
The median age of the patients was 33 years. The primary tumor site was the testicles in seven cases (50%), the mediastinum in six cases (43%), and the brain in one case (7%). The most common metastatic site was the lungs (79%), followed by the brain (43%). All patients with PCC received cytotoxic chemotherapy. Twelve patients had records of their response to cytotoxic chemotherapy; of these 12 patients, eight (8/12, 67%) achieved an objective response, and four (4/12, 33%) achieved stable disease response as the best response during chemotherapy.
Conclusion
It is known that most male PCC patients eventually develop resistance to cytotoxic chemotherapy and die. Factors such as poor response to chemotherapy, high disease burden, brain metastasis, and hemoptysis at the time of diagnosis are associated with shorter survival time in male PCC patients. Programmed death-1/programmed death-ligand 1 blockade therapy can be a salvage treatment for chemotherapy-resistant male PCC patients.
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Purpose The occurrence pattern of immune-related adverse events (irAEs) induced by immune checkpoint inhibitor (ICI) in cancer treatment remains unclear.
Materials and Methods Phase II-III clinical trials that evaluated ICI-based treatments in cancer and were published between January 2007 and December 2019 were retrieved from public electronic databases. The pooled median time to onset (PMT-O), resolution (PMT-R), and immune-modulation resolution (PMT-IMR) of irAEs were generated using the metamedian package of R software.
Results Twenty-two eligible studies involving 23 clinical trials and 8,436 patients were included. The PMT-O of all-grade irAEs ranged from 2.2 to 14.8 weeks, with the longest in renal events. The PMT-O of grade ≥ 3 irAEs was significantly longer than that of all-grade irAEs induced by programmed cell death protein 1 (PD-1) and its ligand 1 (PD-L1) inhibitors (27.5 weeks vs. 8.4 weeks, p < 0.001) and treatment of nivolumab (NIV) plus ipilimumab (IPI) (7.9 weeks vs. 6.0 weeks, p < 0.001). The PMT-R of all-grade irAEs ranged from 0.1 to 54.3 weeks, with the shortest and longest in hypersensitivity/infusion reaction and endocrine events, respectively. The PMT-IMR of grade ≥ 3 irAEs was significantly shorter than that of all-grade irAEs caused by PD-1/PD-L1 blockade (6.9 weeks vs. 40.6 weeks, p=0.002) and NIV+IPI treatment (3.1 weeks vs. 5.9 weeks, p=0.031).
Conclusion This study revealed the general and specific occurrence pattern of ICI-induced irAEs in pan-cancers, which was deemed to aid the comprehensive understanding, timely detection, and effective management of ICI-induced irAEs.
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