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Paramyxoviruses for Tumor-targeted Immunomodulation: Design and Evaluation Ex Vivo
Published on: January 7, 2019
Vaccines based on abnormal self-antigens as tumor-associated antigens: immune regulation
Adam M Farkas1, Olivera J Finn
1Department of Immunology, University of Pittsburgh School of Medicine, E1044, Biomedical Science Tower, 200 Lothrop St., Pittsburgh, PA 15261, USA.
Abstract:
Abnormal expression of "self" antigens on tumors compared with normal cells provides opportunities and challenges for development of cancer vaccines. We review recent work in pre-clinical transgenic mouse models and in clinical trials that has elucidated multiple regulatory mechanisms that interfere with the induction of effective immunity. We discuss these as being either part of the normal function of the immune system or being driven by the tumor microenvironment. Collectively this work shows that it is possible to design vaccines based on tumor-associated antigens and elicit effective immunity against abnormal expression of these antigens on tumors without causing autoimmunity.
Insights
Developing cancer vaccines targeting abnormal self-antigens is challenging. Research in mouse models and clinical trials reveals immune regulation mechanisms, enabling effective cancer immunity without autoimmunity.
Area of Science:
- Immunology
- Oncology
- Vaccinology
Background:
- Tumor cells express abnormal "self" antigens, presenting unique targets for cancer vaccines.
- Inducing effective anti-tumor immunity faces challenges from regulatory mechanisms within the immune system and tumor microenvironment.
Purpose of the Study:
- To review pre-clinical and clinical research on regulatory mechanisms interfering with cancer vaccine efficacy.
- To discuss strategies for designing effective cancer vaccines that overcome immune tolerance and avoid autoimmunity.
Main Methods:
- Review of pre-clinical studies using transgenic mouse models.
- Analysis of data from human clinical trials investigating cancer vaccines.
- Examination of immune regulatory mechanisms in the context of tumor-associated antigens.
Main Results:
- Elucidation of multiple regulatory mechanisms that suppress anti-tumor immune responses.
- Identification of immune system functions and tumor microenvironment factors contributing to immune interference.
- Demonstration that effective immunity against tumor-associated antigens can be induced without self-reactivity.
Conclusions:
- Cancer vaccines targeting tumor-associated antigens can elicit effective immunity.
- Overcoming immune regulatory mechanisms is crucial for successful cancer vaccine development.
- Strategies exist to design cancer vaccines that stimulate anti-tumor immunity without causing autoimmunity.
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