Management of Immune Checkpoint Inhibitor Toxicities

Management of immune check-point inhibitor-associated colitis in patients with advanced metastatic cancers: A review article

Immune check-point inhibitors (ICPi) are immunomodulating agents, which have revolutionized the management of advanced metastatic cancers. Being immunomodulating agents, they are predisposed to causing colitis. This descriptive review article emphasized on the management of ICPi-associated colitis in advanced metastatic cancers. We used PubMed, Google Scholar, Scopus, and Embase databases for literature review, and terminologies commonly searched were "management," "immune check-point inhibitors," "colitis," "metastatic," "cancers," "literature," and "review." We reviewed a total of 11 articles done in the last 15 years relevant to ICPi colitis and its management; all the articles showed that diarrhea and colitis are the most common adverse effects observed in patients on ICPi, but prior to establishing the diagnosis of ICPi-causing colitis, possibility of Clostridium difficle or cytomegalovirus infections should be ruled out. Once the diagnosis of ICPi colitis is established, treatment should be started depending upon the severity of colitis. In mild severity, discontinuation of ICPi can resolve the symptoms but, in most of the patients with moderate to high severity of colitis, corticosteroids are considered a cornerstone treatment. Patients unresponsive to steroid treatment should be re-evaluated for infections after which anti-TNF therapy-infliximab or vedolizumab, cyclosporine, mycophenolate mofetil-can be considered.

Lidocaine Infusion: An Analgesic Option for Checkpoint Inhibitor Arthritis: A Case Report

This report describes the use of subcutaneous lidocaine infusion to manage complex pain associated with checkpoint inhibitor inflammatory arthritis. In addition, the safe administration of lidocaine in the home setting is described. A 49-year-old man with metastatic melanoma to lung, right axilla and posterior chest wall on regular pembrolizumab developed checkpoint inhibitor inflammatory arthritis. Pain associated with this was unresponsive to simple analgesia, escalating opioids and adjuvant analgesics. Lidocaine infusion was used on separate occasions (inpatient unit and home setting) to gain rapid and sustained control of inflammatory pain. Inflammatory pain responded well to 2 mg/kg/h lidocaine infusion over 4 days with sustained response between infusions of up to 6 wk. Resulting in improved mobility, functional status, and overall quality of life. Lidocaine infusion should be considered as an option for analgesic management of checkpoint inhibitor inflammatory arthritis in patients for whom usual treatment is ineffective, and as an opioid-sparing intervention.

Treatment options for immune-related adverse events associated with immune checkpoint inhibitors

The immunotherapy revolution with the use of immune checkpoint inhibitors (ICIs) started with the clinical use of the first ICI, ipilimumab, in 2011. Since then, the field of ICI therapy has rapidly expanded - with the FDA approval of 10 different ICI drugs so far and their incorporation into the therapeutic regimens of a range of malignancies. While ICIs have shown high anti-cancer efficacy, they also have characteristic side effects, termed immune-related adverse events (irAEs). These side effects hinder the therapeutic potential of ICIs and, therefore, finding ways to prevent and treat them is of paramount importance. The current protocols to manage irAEs follow an empirical route of steroid administration and, in more severe cases, ICI withdrawal. However, this approach is not optimal in many cases, as there are often steroid-refractory irAEs, and there is a potential for corticosteroid use to promote tumour progression. This review surveys the current alternative approaches to the treatments for irAEs, with the goal of summarizing and highlighting the best attempts to treat irAEs, without compromising anti-tumour immunity and allowing for rechallenge with ICIs after resolution of the irAEs.

Immune checkpoint inhibitor lichenoid eruption due to pembrolizumab

Pembrolizumab is an immune checkpoint inhibitor used in many cancer types, including genitourinary cancers. Although immunotherapies have dramatically changed the landscape of cancer treatment by providing an alternative to traditional chemotherapy, they have been associated with significant immune-related adverse events (IRAEs) with wide-ranging clinical manifestations. We present the case of an elderly woman on pembrolizumab for metastatic bladder cancer who developed cutaneous IRAE with lichenoid eruptions that responded to high-dose intravenous glucocorticoids.

Translational considerations for immunotherapy clinical trials in pediatric neuro-oncology

While immunotherapy for pediatric cancer has made great strides in recent decades, including the FDA approval of agents such as dinutuximab and tisgenlecleucel, these successes have rarely impacted children with pediatric central nervous system (CNS) tumors. As our understanding of the biological underpinnings of these tumors evolves, new immunotherapeutics are undergoing rapid clinical translation specifically designed for children with CNS tumors. Most recently, there have been notable clinical successes with oncolytic viruses, vaccines, adoptive cellular therapy, and immune checkpoint inhibition. In this article, the immunotherapy working group of the Pacific Pediatric Neuro-Oncology Consortium (PNOC) reviews the current and future state of immunotherapeutic CNS clinical trials with a focus on clinical trial development. Based on recent therapeutic trials, we discuss unique immunotherapy clinical trial challenges, including toxicity considerations, disease assessment, and correlative studies. Combinatorial strategies and future directions will be addressed. Through internationally collaborative efforts and consortia, we aim to direct this promising field of immuno-oncology to the next frontier of successful application against pediatric CNS tumors.

Gastrointestinal treatment-related adverse events of combined immune checkpoint inhibitors: a meta-analysis

Introduction: Combined immune checkpoint inhibitors can cause gastrointestinal adverse events. Methods: We performed a meta-analysis of pooled colonic, hepatic and pancreatic treatment-related adverse events of combined ICI. Results: 53 trials reporting treatment-related adverse events in 6581 patients. All grade diarrhea was the most common adverse event seen in 25.4% patients, followed by all grade hepatitis in nearly 13% patients and pancreatitis in nearly 7.5% patients. Conclusion: Our study provides pooled data of treatment-related adverse events from different combination immune checkpoint inhibitors use in solid tumors and demonstrates a high incidence of all grades and ≥3 grade gastrointestinal adverse events. Further studies are required to characterize these adverse events and assess their overall impact on treatment course and outcomes.

Rheumatologic immune checkpoint inhibitor-related adverse events

PURPOSE OF REVIEW

Immune check point inhibitors (ICIs) are a unique class of cancer treatments that harness the body's innate antitumor response. Although these medications have transformed oncology care, they also lead to generalized immune activation that can result in toxicities across a spectrum of organ systems called immune-related adverse events. This article reviews the most common rheumatologic immune-related adverse events and their management.

RECENT FINDINGS

Inflammatory arthritis, polymyalgia rheumatic, sicca symptoms, systemic sclerosis, myositis, and vasculitis have all been reported as ICI adverse events. Treatment includes nonsteroidal anti-inflammatory drugs, glucocorticoids, traditional DMARDs, and biologics.

SUMMARY

Rheumatologists have an important role in the management of patients with rheumatologic immune-related adverse events. Working with our oncology colleagues, we can help manage rheumatologic immune-related adverse events while optimally preserving ICI's antitumor effects.

Anticuerpos inmunomoduladores en el tratamiento del cáncer

Los anticuerpos inmunomoduladores (Aim) tienen la capacidad de modificar el funcionamiento del sistema inmune. Sus efectos sobre los receptores CTLA-4 y PD-1 producen disminución de la activación celular, afectando las acciones de los linfocitos T. La función de ambos receptores es cesar las funciones de las células inmunes autorreactivas que no son destruidas en las estructuras inmunes correspondientes y proteger los tejidos inflamados. Los tumores que expresan estos receptores evitan el reconocimiento por parte de las células inmunes. Los Aim bloquean los receptores y permiten a los linfocitos reconocer y responder ante antígenos neoplásicos. Las investigaciones sobre los fármacos con Aim muestran eficacia moderada en el tratamiento de algunos casos de cáncer en estadios avanzados. El uso combinado de fármacos tiene potenciales efectos sinérgicos con resultados positivos. Aún deben establecerse los posibles indicadores de éxito terapéutico y la posibilidad de reducir los efectos adversos en el uso clínico. El objetivo de esta revisión fue analizar las funciones y utilidad terapéutica de los anticuerpos inmunomoduladores en el tratamiento del cáncer.  

Evolution of Radiological Treatment Response Assessments for Cancer Immunotherapy: From iRECIST to Radiomics and Artificial Intelligence

Immunotherapy has revolutionized and opened a new paradigm for cancer treatment. In the era of immunotherapy and molecular targeted therapy, precision medicine has gained emphasis, and an early response assessment is a key element of this approach. Treatment response assessment for immunotherapy is challenging for radiologists because of the rapid development of immunotherapeutic agents, from immune checkpoint inhibitors to chimeric antigen receptor-T cells, with which many radiologists may not be familiar, and the atypical responses to therapy, such as pseudoprogression and hyperprogression. Therefore, new response assessment methods such as immune response assessment, functional/molecular imaging biomarkers, and artificial intelligence (including radiomics and machine learning approaches) have been developed and investigated. Radiologists should be aware of recent trends in immunotherapy development and new response assessment methods.

The multifaceted roles of common gut microbiota in immune checkpoint inhibitor-mediated colitis: From mechanism to clinical application

With the arrival of the era of tumor immunotherapy, Immune Checkpoint Inhibitors have benefited countless tumor patients. However, the emergence of Immune-Related Adverse Events, especially Immune Checkpoint Inhibitor-Mediated Colitis (IMC), has become an important obstacle to immunotherapy. Therefore, it is very important to clarify the mechanism and influencing factors of IMC. The effect of gut microbiota on IMC is gradually becoming a research hotspot. Gut microbiota from different phyla can affect IMC by regulating innate and acquired immunity of tumor patients in various ways. In this review, we make a systematic and comprehensive introduction of the effect of gut microbiota on IMC. Through understanding the specific effects of gut microbiota on IMC, and then exploring the possibility of reducing IMC by regulating gut microbiota.

Toxicity spectrum of immunotherapy in advanced lung cancer: A safety analysis from clinical trials and a pharmacovigilance system

BACKGROUND

With the increased use of immune checkpoint inhibitors (ICIs) in advanced lung cancer, adverse events (AEs), particularly immune-related AEs (irAEs), have garnered considerable interest. We conducted a comprehensive assessment of the toxicity profile in advanced lung cancer using multi-source medical data.

METHODS

First, we systematically searched the PubMed, Embase, and Cochrane Library databases (from inception to 10 August 2021) for relevant randomised controlled trials (RCTs) involving ICI-based treatments for advanced lung cancer. The primary outcomes were treatment-related AEs and irAEs, including events that were assigned grade 1-5 and 3-5. The secondary outcomes were grade 5 AEs and irAEs (grade 1-5 and grade 3-5) in specific organs. Network comparisons were conducted for 11 treatments, including chemotherapy (CT), ICI monotherapy (three regimens: programmed death-1 receptor [PD-1] inhibitors, programmed death ligand-1 [PD-L1] inhibitors, and cytotoxic T lymphocyte-associated antigen [CTLA-4] inhibitors), dual-ICI combination therapy (two regimens), and treatment using one or two ICI drugs administered in combination with CT (five regimens). We also conducted a disproportionality analysis by extracting reports of various irAEs associated with ICIs from the FDA Adverse Event Reporting System (FAERS) database. The reporting odds ratios and fatality proportions of different irAEs were calculated and compared. PROSPERO: CRD42021268650.

FINDINGS

Overall, 41 RCTs involving 23,121 patients with advanced lung cancer were included. Treatments containing chemotherapy increased the risk of treatment-related AEs compared to ICI-based regimens without chemotherapy. Concerning irAEs, PD-L1 + CTLA-4 + CT was associated with the highest risk of grade 1-5 irAEs, followed by two regimens of dual ICI combination, three regimens of ICI monotherapy, and three regimens of one ICI combined with CT. For 3-5 irAEs, CTLA-4 accounted for most AEs. Detailed comparisons of ICI-based treatment options provided irAE profiles based on specific organs/systems and AE severity. Insights from the FAERS database revealed that signals corresponding to pneumonitis, colitis, thyroiditis, and hypophysitis were observed across all ICI regimens. Further analyses of the outcomes indicated that myocarditis (163 of 367, 44.4%), pneumonitis (1610 of 4497, 35.8%), and hepatitis (290 of 931, 31.1%) had high fatality rates.

INTERPRETATION

Included RCTs showed heterogeneity in a few clinical factors, and reports derived from the FAERS database might have involved inaccurate data. Our results can be used as a basis for improving clinical treatment strategies and designing preventive methods for ICI treatment in advanced lung cancer.

FUNDING

This study was supported by the Research Project of Drug Clinical Comprehensive Evaluation and Drug Treatment Pathway (SHYXH-ZP-2021-001, SHYXH-ZP-2021-006), Clinical Research Innovation and Cultivation Fund of Ren Ji Hospital (RJPY-LX-008), Ren Ji Boost Project of National Natural Science Foundation of China (RJTJ-JX-001), and Shanghai "Rising Stars of Medical Talent" Youth Development Program - Youth Medical Talents - Clinical Pharmacist Program (SHWJRS (2019) 072).

Immunotherapy in Glioblastoma: Current Approaches and Future Perspectives

Glioblastoma (GBM) is the most common malignant brain tumor. Despite multimodality treatment with surgical resection, radiation therapy, chemotherapy, and tumor treating fields, recurrence is universal, median observed survival is low at 8 months and 5-year overall survival is poor at 7%. Immunotherapy aims to generate a tumor-specific immune response to selectively eliminate tumor cells. In treatment of GBM, immunotherapy approaches including use of checkpoint inhibitors, chimeric antigen receptor (CAR) T-Cell therapy, vaccine-based approaches, viral vector therapies, and cytokine-based treatment has been studied. While there have been no major breakthroughs to date and broad implementation of immunotherapy for GBM remains elusive, multiple studies are underway. In this review, we discuss immunotherapy approaches to GBM with an emphasis on molecularly informed approaches.

[Physical long-term consequences of cancer]

The number of long-term survivors of malignant diseases is steadily increasing, which is due to the further development and optimization of multimodal therapy strategies and the mechanisms of new substance classes. These can now be combined with classical treatment methods or used sequentially. At the same time the number of patients who suffer from physical and psychosocial long-term consequences of cancer therapies or have to live with chronic side effects under the long-term therapies increases. Every therapy, whether radiation, chemotherapy, targeted therapy, or operation, has undesirable long-term side effects that contribute to the decrease of one's quality of life. These affect all parts of the body. As a result, patients can be heavily burdened. In oncology and in other disciplines involved in aftercare, these consequences must therefore be increasingly addressed and clarified and treatment strategies further developed. Unfortunately, there is still a considerable need for research in this area; moreover, there is a lack of clinical studies examining the evidence of a wide variety of holistic therapy methods.

A Network Comparison on Safety Profiling of Immune Checkpoint Inhibitors in Advanced Lung Cancer

Background

Immune checkpoint inhibitors (ICIs) have become one of the standard treatment options for advanced lung cancer. However, adverse events (AEs), particularly immune–related AEs (irAEs), caused by these drugs have aroused public attention. The current network meta-analysis (NMA) aimed to compare the risk of AEs across different ICI–based regimens in patients with advanced lung cancer.

Methods

We systematically searched the PubMed, EMBASE, and Cochrane Library databases (from inception to 19 April 2021) for relevant randomized controlled trials (RCTs) that compared two or more treatments, with at least one ICI administered to patients with advanced lung cancer. The primary outcomes were treatment–related AEs and irAEs, including grade 1–5 and grade 3–5. The secondary outcomes were grade 1–5 and grade 3–5 irAEs in specific organs. Both pairwise and network meta-analyses were conducted for chemotherapy, ICI monotherapy, ICI monotherapy + chemotherapy, dual ICIs therapy, and dual ICIs + chemotherapy for all safety outcomes. Node–splitting analyses were performed to test inconsistencies in network. Sensitivity analyses were adopted by restricting phase III RCTs and studies that enrolled patients with non–small cell lung cancer.

Results

Overall, 38 RCTs involving 22,178 patients with advanced lung cancer were enrolled. Both pooled incidence and NMA indicated that treatments containing chemotherapy increased the risk of treatment–related AEs when compared with ICI-based regimens without chemotherapy. As for grade 1–5 irAEs, dual ICIs + chemotherapy was associated with the highest risk of irAEs (probability in ranking first: 50.5%), followed by dual-ICI therapy (probability in ranking second: 47.2%), ICI monotherapy (probability in ranking third: 80.0%), ICI monotherapy + chemotherapy (probability in ranking fourth: 98.0%), and finally chemotherapy (probability in ranking fifth: 100.0%). In grade 3–5 irAEs, subtle differences were observed; when ranked from least safe to safest, the trend was dual ICIs therapy (60.4%), dual ICIs + chemotherapy (42.5%), ICI monotherapy (76.3%), ICI monotherapy + chemotherapy (95.0%), and chemotherapy (100.0%). Furthermore, detailed comparisons between ICI–based options provided irAE profiles based on specific organ/system and severity.

Conclusions

In consideration of overall immune–related safety profiles, ICI monotherapy + chemotherapy might be a better choice among ICI–based treatments for advanced lung cancer. The safety profiles of ICI–based treatments are various by specific irAEs and their severity.

Systematic Review Registration

https://www.crd.york.ac.uk/prospero, identifier CRD42021268650

Immune Checkpoint Inhibitor-Associated Colitis: From Mechanism to Management

Immune checkpoint inhibitors (ICIs), as one of the innovative types of immunotherapies, including programmed cell death-1 (PD-1), programmed cell death-ligand 1 (PD-L1), and cytotoxic T lymphocyte antigen 4 (CTLA-4) inhibitors, have obtained unprecedented benefit in multiple malignancies. However, the immune response activation in the body organs could arise immune-related adverse events (irAEs). Checkpoint inhibitor colitis (CIC) is the most widely reported irAEs. However, some obscure problems, such as the mechanism concerning gut microbiota, the confusing differential diagnosis with inflammatory bowel disease (IBD), the optimal steroid schedule, the reintroduction of ICIs, and the controversial prognosis features, influence the deep understanding and precise diagnosis and management of CIC. Herein, we based on these problems and comprehensively summarized the relevant studies of CIC in patients with NSCLC, further discussing the future research direction of this specific pattern of irAEs.

Anti-VEGF Antibody Protects against Alveolar Exudate Leakage Caused by Vascular Hyperpermeability, Resulting in Mitigation of Pneumonitis Induced by Immunotherapy

Immune-related pneumonitis is an important toxicity associated with checkpoint inhibitor therapy with anti-PD-1 or anti-PD-L1 antibodies, often necessitating discontinuation of treatment. Development of methods to mitigate checkpoint inhibitor-related pneumonitis is required.The contributions of PD-L1, PD-L2, and VEGF to the pathogenesis of pneumonitis were examined in an IL2- plus IL18-induced mouse pneumonitis model (IL pneumonitis model). Furthermore, the incidences of pneumonitis were retrospectively examined in patients with non-small cell lung cancer treated with the anti-PD-L1 mAb atezolizumab plus chemotherapy, with or without the anti-VEGF mAb bevacizumab, in the phase III IMpower150 trial. PD-1 signal blockade by anti-PD-L1 and anti-PD-L2 antibodies aggravated pneumonitis in the IL pneumonitis model. An anti-VEGF antibody prevented PD-1 signal blockade from aggravating pneumonitis in this model. PD-1 signal blockade induced interstitial T-cell infiltration in the lungs, but VEGF blockade did not affect this T-cell infiltration. The anti-VEGF antibody protected against vascular-to-alveolar leakage of protein and fluid due to PD-1 signal blockade in a murine model. In the IMpower150 trial, incidence rates of pneumonitis of any grade were 4.3% in the group without bevacizumab and 2.8% in the group with bevacizumab. In patients with pneumonitis, outcomes of "Not recovered/Not resolved" were reported for 29.4% in the group without bevacizumab compared with 9.1% in the group with bevacizumab. Our findings suggest that anti-VEGF antibodies in combination with checkpoint inhibitors may be a treatment method that can control checkpoint inhibitor-related pneumonitis.

Immune Checkpoint Inhibitor-Induced Gastrointestinal Toxicity: The Opinion of a Gastroenterologist

Immune checkpoint inhibitors (ICIs) are currently an important component of the standard first-line treatment for many neoplasms. Some guidelines recommend ICIs as adjuvant treatment. With their increased use, the incidence of associated immune-mediated adverse reactions will also increase. A significant proportion of these reactions is represented by immune-mediated diarrhea or colitis, hepatitis, and immune-mediated pancreatic damage. The present review aims to highlight the new trends related to the diagnosis and treatment of these adverse effects depending on their degree, from the perspective of the gastroenterologist. To accomplish this, a literature search was performed, and 30 publications were considered relevant (according to the Population, Intervention, Comparison, Outcomes, and Study [PICOS] criteria). The information about each of the three toxicities in this paper was structured in two categories such as differential diagnosis and treatment. This review aims not only to increase awareness of these side effects in the gastroenterology community but also to promote the development of new treatment guidelines with contributions from gastroenterologists.