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The future of cancer treatment: immunomodulation, CARs and combination immunotherapy.

ABSTRACT: In the past decade, advances in the use of monoclonal antibodies (mAbs) and adoptive cellular therapy to treat cancer by modulating the immune response have led to unprecedented responses in patients with advanced-stage tumours that would otherwise have been fatal. To date, three immune-checkpoint-blocking mAbs have been approved in the USA for the treatment of patients with several types of cancer, and more patients will benefit from immunomodulatory mAb therapy in the months and years ahead. Concurrently, the adoptive transfer of genetically modified lymphocytes to treat patients with haematological malignancies has yielded dramatic results, and we anticipate that this approach will rapidly become the standard of care for an increasing number of patients. In this Review, we highlight the latest advances in immunotherapy and discuss the role that it will have in the future of cancer treatment, including settings for which testing combination strategies and 'armoured' CAR T cells are recommended.

SUBMITTER: Khalil DN

PROVIDER: S-EPMC5551685 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature

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The future of cancer treatment: immunomodulation, CARs and combination immunotherapy.

Khalil Danny N DN Smith Eric L EL Brentjens Renier J RJ Wolchok Jedd D JD

Nature reviews. Clinical oncology 20160315 5

In the past decade, advances in the use of monoclonal antibodies (mAbs) and adoptive cellular therapy to treat cancer by modulating the immune response have led to unprecedented responses in patients with advanced-stage tumours that would otherwise have been fatal. To date, three immune-checkpoint-blocking mAbs have been approved in the USA for the treatment of patients with several types of cancer, and more patients will benefit from immunomodulatory mAb therapy in the months and years ahead. C ...[more]

PMID: 26977780

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Project description:Recent immunotherapy advances have convincingly demonstrated complete tumour removal with long-term survival. These impressive clinical responses have rekindled enthusiasm towards immunotherapy and tumour antigen vaccination providing 'cures' for melanoma and other cancers. However, many patients still do not benefit; sometimes harmed by severe autoimmune toxicity. Checkpoint inhibitors (anti-CTLA4; anti-PD-1) and interleukin-2 (IL-2) are 'pure immune drivers' of pre-existing immune responses and can induce either desirable effector-stimulatory or undesirable inhibitory-regulatory responses. Why some patients respond well, while others do not, is presently unknown, but might be related to the cellular populations being 'driven' at the time of dosing, dictating the resulting immune response. Vaccination is in-vivo immunotherapy requiring an active host response. Vaccination for cancer treatment has been skeptically viewed, arising partially from difficulty demonstrating clear, consistent clinical responses. However, this article puts forward accumulating evidence that 'vaccination' immunomodulation constitutes the fundamental, central, intrinsic property associated with antigen exposure not only from exogenous antigen (allogeneic or autologous) administration, but also from endogenous release of tumour antigen (autologous) from in-vivo tumour-cell damage and lysis. Many 'standard' cancer therapies (chemotherapy, radiotherapy etc.) create waves of tumour-cell damage, lysis and antigen release, thus constituting 'in-vivo vaccination' events. In essence, whenever tumour cells are killed, antigen release can provide in-vivo repeated vaccination events. Effective anti-tumour immune responses require antigen release/supply; immune recognition, and immune responsiveness. With better appreciation of endogenous vaccination and immunomodulation, more refined approaches can be engineered with prospect of higher success rates from cancer therapy, including complete responses and better survival rates.

Project description:Unlabelled: Small cell lung cancer (SCLC), which accounts for 10%-15% of lung cancer cases, is an aggressive disease characterized by rapid growth and early widespread metastasis. Although up to 80% of patients respond to first-line chemotherapy, most eventually relapse, and there are no approved agents beyond the second line. Despite the high incidence of mutations in SCLC, to date no targeted therapy has shown a benefit for this patient population, and systemic treatment has not changed significantly during the past 3 decades. Given that extensive-stage SCLC has a 5-year survival rate of only 1%-2%, novel therapies are desperately needed. Recent evidence shows that the immune system is capable of generating antitumor responses against various tumors, including lung cancer, suggesting that immunotherapy may be a viable therapeutic approach to the treatment of patients with SCLC. Of the immunotherapies being investigated for patients with SCLC, antibodies that target the programmed cell death protein-1 (nivolumab and pembrolizumab) and cytotoxic T-lymphocyte antigen-4 (ipilimumab) immune checkpoint pathways are perhaps the most promising. Because these immune checkpoint pathways, which under normal circumstances function to protect healthy tissues from damage during inflammatory responses and maintain self-tolerance, can help tumor cells evade elimination by the immune system, they represent potential therapeutic targets. This review discusses the rationale for immunotherapy and the early clinical results of immunotherapeutic agents being investigated in SCLC.Implications for practiceSmall cell lung cancer (SCLC) is an aggressive lung cancer subtype. Despite sensitivity to first-line chemotherapy, SCLC has high recurrence rates, and responses to second-line treatments are poor. Recent evidence shows that the immune system is capable of generating responses against various tumors, including lung cancer, suggesting that immunotherapy may be a viable approach for patients with SCLC. Of several immunotherapies being investigated, antibodies that target the programmed cell death protein-1 (nivolumab and pembrolizumab) and cytotoxic T-lymphocyte antigen-4 (ipilimumab) immune checkpoint pathways are among the most promising for patients with SCLC and are the focus of this review.

Dataset Information

The future of cancer treatment: immunomodulation, CARs and combination immunotherapy.

Publications

The future of cancer treatment: immunomodulation, CARs and combination immunotherapy.

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