Cutaneous manifestations associated with immune checkpoint inhibitors

Tissue-resident memory T cells in immunotherapy and immune-related adverse events by immune checkpoint inhibitor

Tissue-resident memory T cells (TRM) are a specialized subset of T cells that reside in tissues and provide long-term protective immunity against pathogens that enter the body through that specific tissue. TRM cells have specific phenotype and reside preferentially in barrier tissues. Recent studies have revealed that TRM cells are the main target of immune checkpoint inhibitor immunotherapy since their role in cancer immunosurveillance. Furthermore, TRM cells also play a crucial part in pathogenesis of immune-related adverse events (irAEs). Here, we provide a concise review of biological characteristics of TRM cells, and the major advances and recent findings regarding their involvement in immune checkpoint inhibitor immunotherapy and the corresponding irAEs.

Psoriasis in the Era of Targeted Cancer Therapeutics: A Systematic Review on De Novo and Pre-existing Psoriasis in Oncologic Patients Treated with Emerging Anti-neoplastic Agents

New advancements in medicine have paved the way for targeted therapies and immune checkpoint inhibitors (ICIs), which have become mainstays of cancer therapy. Targeted therapies work by pinpointing specific molecules in cancer pathways and inhibiting their function, while ICIs target irregularities in the immune system and DNA repair, participating in the induction of cell death. Although these agents have demonstrated great efficacy in treating a diverse set of cancers, they can frequently provoke serious dermatologic adverse effects. The side effects caused by an ICI are classified as immune-related adverse events since ICIs are immunomodulating, while the cutaneous side effects of targeted therapies are known as dermatologic adverse effects. Multiple studies have reported psoriasis and psoriasiform eruptions among the side effects observed in neoplastic patients receiving targeted therapies or ICIs. Psoriasis is an immune-mediated disease characterized by overactive T-cells and keratinocytes. To conduct this review, we retrieved 1363 studies from the PubMed database published between 2008 and 2023 using the terms "psoriasis" AND "cancer treatment." Many of these studies aimed to understand how patients with cancer receiving treatment may develop or even achieve psoriasis remission. Given that cancer and psoriasis involve a delicate balance between immune activation and suppression, ICIs and targeted therapies might produce varying effects. The aim of this review was to explore the relationship between psoriasis and cancer therapeutics while also highlighting the need to prioritize proper management of cutaneous side effects in neoplastic patients.

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.

For the Long Haul: Management of Long-Term Survivors after Melanoma Systemic Therapy

PURPOSE OF REVIEW

This review summarizes the latest advancements in survivorship care for patients with advanced melanoma who received systemic therapy and emphasizes the areas where more research is needed.

RECENT FINDINGS

Over the last decade there have been remarkable advances in the treatment of advanced and metastatic melanoma. Due to these novel treatments, including several immune checkpoint inhibitors and tyrosine kinase inhibitors, there are and will continue to be increasing numbers of long-term melanoma survivors who have been treated with systemic therapy. These patients will navigate new challenges are they are essentially among the first long term survivors after these novel therapies. Survivorship care focuses on improving the health-related quality of life of patients including the physical, emotional, social and functional effects of cancer that begin at diagnosis and continue through the end of life. Survivorship also includes screening for cancer recurrence and second cancers. As the number of melanoma survivors who received systemic therapy continues to grow, the survivorship care plan will become increasingly important for optimal care of patients even after their cancer treatments. Understanding the many domains of survivorship care for this group of patients is imperative for their care now and to identify unmet needs for future research.

Complications of immuno-oncology care: what urologist should know

OBJECTIVES

To provide a practical review of immune-related adverse events (irAEs) that may be encountered in uro-oncology patients.

PATIENTS AND METHODS

We conducted a literature review of studies reporting irAEs including articles published through September 2023 for uro-oncology patients and the potential relevancy for the practicing urologist.

RESULTS

Immunotherapy has revolutionised cancer treatment, extending its impact to urological malignancies including for patients with urothelial, kidney, and prostate cancers. Immuno-oncology (IO) compounds have achieved measurable and durable responses in these cancers. Urologists, choosing to administer or co-manage IO patient care, should be prepared to understand, evaluate, and treat irAEs. This review discusses the spectrum of irAEs that can be encountered. Ongoing trials are exploring the use of immunotherapy at earlier stages of uro-oncological diseases, thus underscoring the evolving landscape of urological cancer treatment. Paradoxically, some data suggests that the occurrence of irAEs is associated with improved oncological outcomes.

CONCLUSIONS

Immune-related AEs, while manageable, may be life-threatening and require lifelong therapy. A thorough understanding of AEs and toxicity of a novel drug class is imperative.

Immune-Related Adverse Events Due to Cancer Immunotherapy: Immune Mechanisms and Clinical Manifestations

The landscape of cancer treatment has undergone a significant transformation with the introduction of Immune Checkpoint Inhibitors (ICIs). Patients undergoing these treatments often report prolonged clinical and radiological responses, albeit with a potential risk of developing immune-related adverse events (irAEs). Here, we reviewed and discussed the mechanisms of action of ICIs and their pivotal role in regulating the immune system to enhance the anti-tumor immune response. We scrutinized the intricate pathogenic mechanisms responsible for irAEs, arising from the evasion of self-tolerance checkpoints due to drug-induced immune modulation. We also summarized the main clinical manifestations due to irAEs categorized by organ types, detailing their incidence and associated risk factors. The occurrence of irAEs is more frequent when ICIs are combined; with neurological, cardiovascular, hematological, and rheumatic irAEs more commonly linked to PD1/PD-L1 inhibitors and cutaneous and gastrointestinal irAEs more prevalent with CTLA4 inhibitors. Due to the often-nonspecific signs and symptoms, the diagnosis of irAEs (especially for those rare ones) can be challenging. The differential with primary autoimmune disorders becomes sometimes intricate, given the clinical and pathophysiological similarities. In conclusion, considering the escalating use of ICIs, this area of research necessitates additional clinical studies and practical insights, especially the development of biomarkers for predicting immune toxicities. In addition, there is a need for heightened education for both clinicians and patients to enhance understanding and awareness.

Galectin 7 leads to a relative reduction in CD4+ T cells, mediated by PD-1

The role of glycan-binding proteins as an activator of immune regulatory receptors has gained attention recently. We report that galectin 7 reduced CD4+ T cell percentage in both in vitro culture and mouse tumor models. Immunohistochemical staining of esophageal cancer patient samples showed a lower percentage of CD4+ cells in the galectin 7 high area. The lack of CD4+ T cell depletion by galectin 7 in PD-1 knockout mice supports the role of PD-1 in mediating the effects of galectin 7. The binding assays demonstrate that galectin 7 binds to the N-glycosylation of PD-1 on N74 and N116 sites and leads to the recruitment of SHP-2. NFAT suppressive activity of galectin 7 was abrogated upon overexpression of the dominant negative SHP-2 mutant or inhibition of PD-1 by siRNA. Glycosylation of PD-1 has been reported to play a critical role in surface expression, stability, and interaction with its ligand PD-L1. This report further expands the significance of PD-1 glycosylation and suggests that galectin 7, a glycan-binding protein, interacts with the immune regulatory receptor PD-1 through glycosylation recognition.

Fever of unknown origin associated with immune checkpoint inhibitors

Since the approval for the treatment of melanoma in 2014, immune checkpoint inhibitors (ICIs) have revolutionized the therapy pattern across various malignancies. Coinciding with their frequent usage, their adverse effects, including fever, cannot be neglected. In the context of cancer diseases and cancer treatments, fever of unknown origin (FUO), which has long posed a challenge for clinicians in terms of diagnosis and management, brings forth new connotation and significance. In this paper review, we present the concept of ICIs-associated FUO, consider activated immune system and elevated cytokines as common mechanisms by which ICIs induce fever and various immune-related adverse events (irAEs), summarize and compare the primary etiologies of ICI-associated FUO, and compare it with conventional types of FUO.

Immunological Mechanisms in Cutaneous Adverse Drug Reactions

Adverse drug reactions (ADRs) are an inherent aspect of drug use. While approximately 80% of ADRs are predictable, immune system-mediated ADRs, often unpredictable, are a noteworthy subset. Skin-related ADRs, in particular, are frequently unpredictable. However, the wide spectrum of skin manifestations poses a formidable diagnostic challenge. Comprehending the pathomechanisms underlying ADRs is essential for accurate diagnosis and effective management. The skin, being an active immune organ, plays a pivotal role in ADRs, although the precise cutaneous immunological mechanisms remain elusive. Fortunately, clinical manifestations of skin-related ADRs, irrespective of their severity, are frequently rooted in immunological processes. A comprehensive grasp of ADR morphology can aid in diagnosis. With the continuous development of new pharmaceuticals, it is noteworthy that certain drugs including immune checkpoint inhibitors have gained notoriety for their association with ADRs. This paper offers an overview of immunological mechanisms involved in cutaneous ADRs with a focus on clinical features and frequently implicated drugs.

Clinical Experience of External Application of Clearing Heat and Removing Dampness in Relieving Grade 2 to 3 Rash Caused by Programed Cell Death Protein 1 (PD-1)/Programed Cell Death Ligand 1 (PD-L1) Inhibitors: A Single-Center Retrospective Study

OBJECTIVE

In China, grade 2 to 3 immune-related rash will probably lead to the interruption of immunotherapy. Corticosteroid (CS) is the main treatment, but not always effective. The external application of clearing heat and removing dampness, which is represented by Qing-Re-Li-Shi Formula (QRLSF), has been used in our hospital to treat immune-related cutaneous adverse events (ircAEs) for the last 5 years. The purpose of this study was to discuss its efficacy and safety in the treatment of grade 2 to 3 rash.

METHODS

A retrospective study of patients with grade 2 to 3 immune-related rash in our hospital from December 2019 to December 2022 was conducted. These patients received QRLSF treatment. Clinical characteristics, treatment outcome, and health-related quality of life (HrQoL) were analyzed.

RESULTS

Thirty patients with grade 2 to 3 rash (median onset time: 64.5 days) were included. The skin lesions of 24 cases (80%) returned to grade 1 with a median time of 8 days. The accompanying symptoms were also improved with median time of 3 to 4 days. The addition of antihistamine (AH) drug didn't increase the efficacy of QRLSF (AH + QRLSF: 75.00% vs QRLSF: 83.33%, P = .66). No significant difference was observed in the efficacy of QRLSF treatment regardless of whether patients had previously received CS therapy (untreated population: 88.24% vs treated population: 69.23%, P = .36). During 1-month follow-up, 2 cases (8.33%) underwent relapses. In terms of HrQoL, QRLSF treatment could significantly reduce the median scores of all domains of Skindex-16, including symptoms (39.58 vs 8.33, P < .0001), emotions (58.33 vs 15.48, P < .0001), functioning (46.67 vs 13.33, P < .0001) and composite (52.60 vs 14.06, P < .0001).

CONCLUSION

External application of clearing heat and removing dampness was proven to be an effective and safe treatment for such patients. In the future, high-quality trials are required to determine its clinical application in the field of ircAEs.

Comparative severe dermatologic toxicities of immune checkpoint inhibitors in malignant melanoma: A systematic review and network meta-analysis

BACKGROUND

Immune checkpoint inhibitors (ICIs) have advanced the therapeutic landscape for malignant melanoma patients. However, they can cause permanent and irreversible dermatologic immune-related adverse events (irAEs) that may lead to interruption of ICI treatment or become life-threatening. To assess the risk of severe dermatologic irAEs (grade 3 or higher) among ICIs for advanced melanoma, we conducted a network meta-analysis (NMA).

METHODS

Phase II/III randomized controlled clinical trials (RCTs) involving ICIs were retrieved from various databases, including PubMed, Embase, Cochrane Library, and Web of Science. These trials were published from the inception of databases to October 15, 2022. In addition, the risk of severe dermatologic irAEs associated with ICI types and doses was evaluated and compared by NMA.

RESULTS

This study included 20 Phase II/III RCTs with a total of 10 575 patients. The results indicated that ICIs carry a higher risk of severe dermatologic irAEs compared to chemotherapy. Additionally, the combinational therapy of Nivolumab + Ipilimumab was associated with a higher risk than ICI monotherapy. Comparatively, the latest treatment option involving dual ICI therapy with Relatlimab + Nivolumab showed a lower toxicity risk, but higher than Ipilimumab alone. Lastly, Nivolumab, at a dose of 3 mg/kg every 2 weeks, was observed as the lowest-risk dosing regimen for severe dermatologic irAEs in patients with advanced melanoma.

CONCLUSION

The findings suggest that Nivolumab (1 mg/kg) + Ipilimumab (3 mg/kg) administered every 3 weeks should be used cautiously in patients with advanced melanoma at high risk for dermatologic irAEs. While we recommend the preferred regimen of Nivolumab (dose = 3 mg/kg, every 2 weeks).

Molecular Mechanisms of Cutaneous Immune-Related Adverse Events (irAEs) Induced by Immune Checkpoint Inhibitors

Over the past few decades, immune checkpoint inhibitors (ICIs) have emerged as promising therapeutic options for the treatment of various cancers. These novel treatments effectively target key mediators of immune checkpoint pathways. Currently, ICIs primarily consist of monoclonal antibodies that specifically block cytotoxic T-lymphocyte antigen 4 (CTLA-4), programmed cell death 1 (PD-1), programmed cell death-ligand 1 (PD-L1), and lymphocyte activation gene 3 protein (LAG-3). Despite the notable efficacy of ICIs in cancer treatment, they can also trigger immune-related adverse events (irAEs), which present as autoimmune-like or inflammatory conditions. IrAEs have the potential to affect multiple organ systems, with cutaneous toxicities being the most commonly observed. Although cutaneous irAEs are typically of low-grade severity and can usually be managed effectively, there are cases where severe irAEs can become life-threatening. Therefore, early recognition and a comprehensive understanding of the mechanisms underlying cutaneous irAEs are crucial for improving clinical outcomes in cancer patients. However, the precise pathogenesis of cutaneous irAEs remains unclear. This review focuses on the skin manifestations induced by ICIs, the prognosis related to cutaneous irAEs, and the exploration of potential mechanisms involved in cutaneous irAEs.

Application of oncolytic virus in tumor therapy

Oncolytic viruses (OVs) can selectively kill tumor cells without affecting normal cells, as well as activate the innate and adaptive immune systems in patients. Thus, they have been considered as a promising measure for safe and effective cancer treatment. Recently, a few genetically engineered OVs have been developed to further improve the effect of tumor elimination by expressing specific immune regulatory factors and thus enhance the body's antitumor immunity. In addition, the combined therapies of OVs and other immunotherapies have been applied in clinical. Although there are many studies on this hot topic, a comprehensive review is missing on illustrating the mechanisms of tumor clearance by OVs and how to modify engineered OVs to further enhance their antitumor effects. In this study, we provided a review on the mechanisms of immune regulatory factors in OVs. In addition, we reviewed the combined therapies of OVs with other therapies including radiotherapy and CAR-T or TCR-T cell therapy. The review is useful in further generalize the usage of OV in cancer treatment.