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Narrative Review of Synergistics Effects of Combining Immunotherapy and Stereotactic Radiation Therapy.

ABSTRACT: Stereotactic radiotherapy (SRT) has become an attractive treatment modality in full bloom in recent years by presenting itself as a safe, noninvasive alternative to surgery to control primary or secondary malignancies. Although the focus has been on local tumor control as the therapeutic goal of stereotactic radiotherapy, rare but intriguing observations of abscopal (or out-of-field) effects have highlighted the exciting possibility of activating antitumor immunity using high-dose radiation. Furthermore, immunotherapy has revolutionized the treatment of several types of cancers in recent years. However, resistance to immunotherapy often develops. These observations have led researchers to combine immunotherapy with SRT in an attempt to improve outcomes. The benefits of this combination would come from the stimulation and suppression of various immune pathways. Thus, in this review, we will first discuss the immunomodulation induced by SRT with the promising results of preclinical studies on the changes in the immune balance observed after SRT. Then, we will discuss the opportunities and risks of the combination of SRT and immunotherapy with the preclinical and clinical data available in the literature. Furthermore, we will see that many perspectives are conceivable to potentiate the synergistic effects of this combination with the need for prospective studies to confirm the encouraging data.

SUBMITTER: Lucia F

PROVIDER: S-EPMC9219862 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Narrative Review of Synergistics Effects of Combining Immunotherapy and Stereotactic Radiation Therapy.

Lucia François F Geier Margaux M Schick Ulrike U Bourbonne Vincent V

Biomedicines 20220615 6

Stereotactic radiotherapy (SRT) has become an attractive treatment modality in full bloom in recent years by presenting itself as a safe, noninvasive alternative to surgery to control primary or secondary malignancies. Although the focus has been on local tumor control as the therapeutic goal of stereotactic radiotherapy, rare but intriguing observations of abscopal (or out-of-field) effects have highlighted the exciting possibility of activating antitumor immunity using high-dose radiation. Fur ...[more]

PMID: 35740435

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Project description:Background and objectiveStereotactic body radiation therapy (SBRT) is a highly conformal technique of external beam radiotherapy precisely delivering high total (ablative) doses in a small number of fractions to clearly defined target volumes. Its development enabled efficient and safe radiation treatments in patients with localized hepatocellular cancer (HCC) unsuitable for other local treatment options. Moreover, it can be easily combined with several other therapy approaches. Thus, the aim of this narrative review is to outline the current role of SBRT in the multifocal treatment of HCC patients.MethodsWe searched PubMed for articles dealing with SBRT alone, in combination with other local or systemic treatments or in comparison to other local treatments in patients with HCC. This included original articles, reviews and conceptional articles dealing with the technique of SBRT. All articles were analysed for suitability by two independent reviewers.Key content and findingsThis review summarizes the currently available evidence for SBRT as a definitive treatment for HCC as well as its role within combination approaches including bridging to transplantation. SBRT is an effective and safe definitive treatment option in patients with localized HCC unsuitable for surgery and/or other local therapies based on retrospective and prospective series. Its combination with other local treatments yields superior results compared to single modality treatment based on non-randomized data. A growing number of prospective trials confirmed at least similar if not superior rates of local control with low toxicities compared to well established other local treatments even in non-selected patients.ConclusionsSBRT is a promising tool in the treatment of HCC. It can be used either as definitive treatment, within combination approaches or as a bridging tool. Several phase III trials comparing SBRT with other local options are ongoing, which will further clarify its encouraging role.

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Narrative Review of Synergistics Effects of Combining Immunotherapy and Stereotactic Radiation Therapy.

Publications

Narrative Review of Synergistics Effects of Combining Immunotherapy and Stereotactic Radiation Therapy.

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