1
|
Conley AP, Oronsky B, Caroen S, Larson C, Reid T. Predicting the Abscopal Phenomenon-Letter to the Editor. Mol Cancer Ther 2024; 23:248-249. [PMID: 38298150 PMCID: PMC10831331 DOI: 10.1158/1535-7163.mct-23-0399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/17/2023] [Accepted: 10/18/2023] [Indexed: 02/02/2024]
|
2
|
Larson C, Oronsky B, Reid TR. Commentary on oncolytic viruses: past, present, and future. J Immunother Cancer 2023; 11:e007905. [PMID: 38135348 DOI: 10.1136/jitc-2023-007905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
Whither oncolytic viruses? From the peak of their popularity in the early 2000s, when the ONYX-015 adenovirus had just entered the clinic, and then again in 2015 when the Food and Drug Administration-approved talimogene laherparepvec (also known as OncoVEXGM-CSF), which briefly revived interest, oncolytic viruses (OVs) have mostly fallen out of favor despite the many pharmaceutical companies with OVs in development.This commentary enumerates and addresses the core conceptions, perceptions, and misconceptions that characterize the current 'trough of disillusionment' in which the field of anticancer virotherapy finds itself and suggests reasons for optimism.
Collapse
|
3
|
Chen P, Paraiso WKD, Cabral H. Revitalizing Cytokine-Based Cancer Immunotherapy through Advanced Delivery Systems. Macromol Biosci 2023; 23:e2300275. [PMID: 37565723 DOI: 10.1002/mabi.202300275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/04/2023] [Indexed: 08/12/2023]
Abstract
Cytokines can coordinate robust immune responses, holding great promise as therapeutics against infections, autoimmune diseases, and cancers. In cancer treatment, numerous pro-inflammatory cytokines have displayed promising efficacy in preclinical studies. However, their clinical application is hindered by poor pharmacokinetics, significant toxicity and unsatisfactory anticancer efficacy. Thus, while IFN-α and IL-2 are approved for specific cancer treatments, other cytokines still remain subject of intense investigation. To accelerate the application of cytokines as cancer immunotherapeutics, strategies need to be directed to improve their safety and anticancer performance. In this regard, delivery systems could be used to generate innovative therapies by targeting the cytokines or nucleic acids, such as DNA and mRNA, encoding the cytokines to tumor tissues. This review centers on these innovative delivery strategies for cytokines, summarizing key approaches, such as gene delivery and protein delivery, and critically examining their potential and challenges for clinical translation.
Collapse
Affiliation(s)
- Pengwen Chen
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | | | - Horacio Cabral
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| |
Collapse
|
4
|
Pelka S, Guha C. Enhancing Immunogenicity in Metastatic Melanoma: Adjuvant Therapies to Promote the Anti-Tumor Immune Response. Biomedicines 2023; 11:2245. [PMID: 37626741 PMCID: PMC10452223 DOI: 10.3390/biomedicines11082245] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/26/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Advanced melanoma is an aggressive form of skin cancer characterized by low survival rates. Less than 50% of advanced melanoma patients respond to current therapies, and of those patients that do respond, many present with tumor recurrence due to resistance. The immunosuppressive tumor-immune microenvironment (TIME) remains a major obstacle in melanoma therapy. Adjuvant treatment modalities that enhance anti-tumor immune cell function are associated with improved patient response. One potential mechanism to stimulate the anti-tumor immune response is by inducing immunogenic cell death (ICD) in tumors. ICD leads to the release of damage-associated molecular patterns within the TIME, subsequently promoting antigen presentation and anti-tumor immunity. This review summarizes relevant concepts and mechanisms underlying ICD and introduces the potential of non-ablative low-intensity focused ultrasound (LOFU) as an immune-priming therapy that can be combined with ICD-inducing focal ablative therapies to promote an anti-melanoma immune response.
Collapse
Affiliation(s)
- Sandra Pelka
- Department of Development and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| | - Chandan Guha
- Department of Radiation Oncology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Urology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Institute of Onco-Physics, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| |
Collapse
|
5
|
Wang J, Ge H, Tian Z. Immunotherapy Plus Radiotherapy for the Treatment of Sarcomas: Is There a Potential for Synergism? Onco Targets Ther 2023; 16:385-397. [PMID: 37313391 PMCID: PMC10258041 DOI: 10.2147/ott.s410693] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/25/2023] [Indexed: 06/15/2023] Open
Abstract
Soft tissue sarcoma (STS) is a highly heterogeneous malignant tumor derived from mesenchymal tissue. Advanced STS has a poor response to the current anti-cancer therapeutic options, with a median overall survival of less than two years. Thus, new and more effective treatment methods for STS are needed. Increasing evidence has shown that immunotherapy and radiotherapy have synergistic therapeutic effects against malignant tumors. In addition, immunoradiotherapy has yielded positive results in clinical trials for various cancers. In this review, we discuss the synergistic mechanism of immunoradiotherapy in cancer treatment and the application of this combined regimen for the treatment of several cancers. In addition, we summarize the existing evidence on the use of immunoradiotherapy for the treatment of STS and the relevant clinical trials that are currently ongoing. Furthermore, we identify challenges in the use of immunoradiotherapy for the treatment of sarcomas and propose methods and precautions for overcoming these challenges. Lastly, we propose clinical research strategies and future research directions to help in the research and treatment of STS.
Collapse
Affiliation(s)
- Jiaqiang Wang
- Department of Bone and Soft Tissue, the Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, Henan Province, 450008, People’s Republic of China
| | - Hong Ge
- Department of Radiotherapy, the Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, Henan Province, 450008, People’s Republic of China
| | - Zhichao Tian
- Department of Bone and Soft Tissue, the Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, Henan Province, 450008, People’s Republic of China
| |
Collapse
|
6
|
Regenold M, Wang X, Kaneko K, Bannigan P, Allen C. Harnessing immunotherapy to enhance the systemic anti-tumor effects of thermosensitive liposomes. Drug Deliv Transl Res 2023; 13:1059-1073. [PMID: 36577832 DOI: 10.1007/s13346-022-01272-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2022] [Indexed: 12/29/2022]
Abstract
Chemotherapy plays an important role in debulking tumors in advance of surgery and/or radiotherapy, tackling residual disease, and treating metastatic disease. In recent years many promising advanced drug delivery strategies have emerged that offer more targeted delivery approaches to chemotherapy treatment. For example, thermosensitive liposome-mediated drug delivery in combination with localized mild hyperthermia can increase local drug concentrations resulting in a reduction in systemic toxicity and an improvement in local disease control. However, the majority of solid tumor-associated deaths are due to metastatic spread. A therapeutic approach focused on a localized target area harbors the risk of overlooking and undertreating potential metastatic spread. Previous studies reported systemic, albeit limited, anti-tumor effects following treatment with thermosensitive liposomal chemotherapy and localized mild hyperthermia. This work explores the systemic treatment capabilities of a thermosensitive liposome formulation of the vinca alkaloid vinorelbine in combination with mild hyperthermia in an immunocompetent murine model of rhabdomyosarcoma. This treatment approach was found to be highly effective at heated, primary tumor sites. However, it demonstrated limited anti-tumor effects in secondary, distant tumors. As a result, the addition of immune checkpoint inhibition therapy was pursued to further enhance the systemic anti-tumor effect of this treatment approach. Once combined with immune checkpoint inhibition therapy, a significant improvement in systemic treatment capability was achieved. We believe this is one of the first studies to demonstrate that a triple combination of thermosensitive liposomes, localized mild hyperthermia, and immune checkpoint inhibition therapy can enhance the systemic treatment capabilities of thermosensitive liposomes.
Collapse
Affiliation(s)
- Maximilian Regenold
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada
| | - Xuehan Wang
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada
| | - Kan Kaneko
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada
| | - Pauric Bannigan
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada
| | - Christine Allen
- Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada.
| |
Collapse
|
7
|
Chen P, Yang W, Nagaoka K, Huang GL, Miyazaki T, Hong T, Li S, Igarashi K, Takeda K, Kakimi K, Kataoka K, Cabral H. An IL-12-Based Nanocytokine Safely Potentiates Anticancer Immunity through Spatiotemporal Control of Inflammation to Eradicate Advanced Cold Tumors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2205139. [PMID: 36739605 PMCID: PMC10074049 DOI: 10.1002/advs.202205139] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 12/12/2022] [Indexed: 06/18/2023]
Abstract
Treatment of immunologically cold tumors is a major challenge for immune checkpoint inhibitors (ICIs). Interleukin 12 (IL-12) can invigorate ICIs against cold tumors by establishing a robust antitumor immunity. However, its toxicity and systemic induction of counteracting immunosuppressive signals have hindered translation. Here, IL-12 activity is spatiotemporally controlled for safely boosting efficacy without the stimulation of interfering immune responses by generating a nanocytokine that remains inactive at physiological pH, but unleashes its full activity at acidic tumor pH. The IL-12-based nanocytokine (Nano-IL-12) accumulate and release IL-12 in tumor tissues, eliciting localized antitumoral inflammation, while preventing systemic immune response, counteractive immune reactions, and adverse toxicities even after repeated intravenous administration. The Nano-IL-12-mediated spatiotemporal control of inflammation prompt superior anticancer efficacy, and synergize with ICIs to profoundly inflame the tumor microenvironment and completely eradicate ICI-resistant primary and metastatic tumors. The strategy could be a promising approach toward safer and more effective immunotherapies.
Collapse
Affiliation(s)
- Pengwen Chen
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| | - Wenqian Yang
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| | - Koji Nagaoka
- Department of ImmunotherapeuticsThe University of Tokyo Hospital7‐3‐1 Hongo, Bunkyo‐kuTokyo113‐8655Japan
| | - George Lo Huang
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| | - Takuya Miyazaki
- Red Arrow Therapeutics, Inc.7‐3‐1 Hongo, Bunkyo‐kuTokyo113‐0003Japan
- Kanagawa Institute of Industrial Science and Technology705‐1ShimoimaizumiEbina CityKanagawa243‐0435Japan
| | - Taehun Hong
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| | - Shangwei Li
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| | - Kazunori Igarashi
- Department of Otorhinolaryngology and Head and Neck SurgeryGraduate School of Medicine and Faculty of MedicineThe University of Tokyo7‐3‐1 Hongo, Bunkyo‐kuTokyo113‐0033Japan
| | - Kazuyoshi Takeda
- Department of Biofunctional MicrobiotaGraduate School of MedicineJuntendo University2‐1‐1 Hongo, Bunkyo‐kuTokyo113‐8421Japan
- Laboratory of Cell BiologyResearch Support CenterGraduate School of MedicineJuntendo University2‐1‐1 Hongo, Bunkyo‐kuTokyo113‐8421Japan
| | - Kazuhiro Kakimi
- Department of ImmunotherapeuticsThe University of Tokyo Hospital7‐3‐1 Hongo, Bunkyo‐kuTokyo113‐8655Japan
| | - Kazunori Kataoka
- Innovation Center of NanoMedicine (iCONM)Kawasaki Institute of Industrial Promotion3‐25‐14 Tonomachi, Kawasaki‐kuKawasaki210‐0821Japan
| | - Horacio Cabral
- Department of BioengineeringGraduate School of EngineeringThe University of Tokyo7‐3‐1 HongoBunkyo‐kuTokyo113‐8656Japan
| |
Collapse
|
8
|
Muller S. The abscopal effect: Implications for drug discovery in autoimmunity. Autoimmun Rev 2023; 22:103315. [PMID: 36924921 DOI: 10.1016/j.autrev.2023.103315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 03/09/2023] [Indexed: 03/17/2023]
Abstract
The emergence of novel targeted therapies and the tools that increase the stability and delivery of drugs have greatly improved treatment outcomes in autoimmune diseases (ADs). Recently-developed strategies deplete specific deleterious T- and B-cell subsets, interrupt receptor-ligand interactions, and/or inhibit the secretion or activity of inflammatory mediators linked to tissue damage. Although generally efficient, these lines of intervention have limitations, with documented cases of drug-resistance and undesired side effects. They are also difficult to apply to non-organ-specific ADs, where the trigger and effector antigens are unknown and in which autoimmune activity is widely spread throughout the body. The potential of cellular modulators that act at a distance from the affected site, by abscopal effect, as described in the case of cancer radio- and immuno-therapy might be especially efficient in the context of ADs. Future research to discover small molecule- and peptide-based treatments will need to explore potential drugs with abscopal effects that could elicit potent immune tolerance and clinical quiescence to restore quality of life of affected patients.
Collapse
Affiliation(s)
- Sylviane Muller
- CNRS and Strasbourg University Unit Biotechnology and Cell signalling/Strasbourg Drug Discovery and Development Institute (IMS), Strasbourg, France; Fédération Hospitalo-Universitaire OMICARE, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Strasbourg University, Strasbourg, France; University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France.
| |
Collapse
|
9
|
Determinants of activity and efficacy of anti-PD1/PD-L1 therapy in patients with advanced solid tumors recruited in a clinical trials unit: a longitudinal prospective biomarker-based study. Cancer Immunol Immunother 2023; 72:1709-1723. [PMID: 36625938 DOI: 10.1007/s00262-022-03360-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 12/25/2022] [Indexed: 01/11/2023]
Abstract
Immune-checkpoint inhibitors (ICI) have revolutionized the therapeutic landscape of cancer. However, optimal patient selection is still an unmet need. One-hundred-forty-six patients with metastatic cancer candidates to ICI at the Hospital Clinic of Barcelona Clinical Trials Unit were prospectively recruited in this observational study. Blood samples were collected at different timepoints, baseline LIPI score calculated and pre-ICI archived tissues retrieved to evaluate PD-L1, tumor-infiltrating lymphocytes (TILs) and PD1 mRNA levels. Tumor assessments were centrally reviewed by RECIST 1.1 criteria. Associations with overall response rates (ORR), durable clinical benefit (DCB), progression-free survival (PFS) and overall survival (OS) were performed with univariable/multivariable logistic and Cox regressions, where appropriate. At a median follow-up of 26.9 months, median PFS and OS were 2.7 and 12.9 months. Response rates were 17.8% with duration of response (DOR) of 4.4 months. LIPI score was independently associated with PFS (p = 0.025) and OS (p < 0.001). Immunotherapy-naïve status was independently associated with better PFS (p = 0.005). Time-to-best response (TTBR) and ORR (p < 0.001 both) were associated with better OS at univariate analysis. PFS and DOR were moderately correlated with OS (p < 0.001 both). A PD-L1 10% cut-off detected worse/best responders in terms of ORR (univariate p = 0.011, multivariate p = 0.028) and DCB (univariate p = 0.043). PD1 mRNA levels were strikingly associated to complete responses (p = 0.021). To resume, in our prospective observational pan-cancer study, baseline LIPI score, immunotherapy-naïve status, cancer type and RT before starting ICI were the most relevant clinical factors independently correlated with immunotherapy outcomes. Longer TTBR seemed to associate with better survival, while PD1 mRNA and PD-L1 protein levels might be tumor-agnostic predictive factors of response to ICI and should be furtherly explored.
Collapse
|
10
|
Jungles KM, Holcomb EA, Pearson AN, Jungles KR, Bishop CR, Pierce LJ, Green MD, Speers CW. Updates in combined approaches of radiotherapy and immune checkpoint inhibitors for the treatment of breast cancer. Front Oncol 2022; 12:1022542. [PMID: 36387071 PMCID: PMC9643771 DOI: 10.3389/fonc.2022.1022542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/27/2022] [Indexed: 12/05/2022] Open
Abstract
Breast cancer is the most prevalent non-skin cancer diagnosed in females and developing novel therapeutic strategies to improve patient outcomes is crucial. The immune system plays an integral role in the body’s response to breast cancer and modulating this immune response through immunotherapy is a promising therapeutic option. Although immune checkpoint inhibitors were recently approved for the treatment of breast cancer patients, not all patients respond to immune checkpoint inhibitors as a monotherapy, highlighting the need to better understand the biology underlying patient response. Additionally, as radiotherapy is a critical component of breast cancer treatment, understanding the interplay of radiation and immune checkpoint inhibitors will be vital as recent studies suggest that combined therapies may induce synergistic effects in preclinical models of breast cancer. This review will discuss the mechanisms supporting combined approaches with radiotherapy and immune checkpoint inhibitors for the treatment of breast cancer. Moreover, this review will analyze the current clinical trials examining combined approaches of radiotherapy, immunotherapy, chemotherapy, and targeted therapy. Finally, this review will evaluate data regarding treatment tolerance and potential biomarkers for these emerging therapies aimed at improving breast cancer outcomes.
Collapse
Affiliation(s)
- Kassidy M. Jungles
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, United States
| | - Erin A. Holcomb
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Ashley N. Pearson
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, MI, United States
| | - Kalli R. Jungles
- Department of Biology, Saint Mary’s College, Notre Dame, IN, United States
| | - Caroline R. Bishop
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, United States
| | - Lori J. Pierce
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
| | - Michael D. Green
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI, United States
- Department of Radiation Oncology, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI, United States
- *Correspondence: Michael D. Green, ; Corey W. Speers,
| | - Corey W. Speers
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI, United States
- Rogel Cancer Center, University of Michigan, Ann Arbor, MI, United States
- Department of Radiation Oncology, University Hospitals Cleveland Medical Center, Case Western Reserve University, Case Comprehensive Cancer Center, Cleveland, OH, United States
- *Correspondence: Michael D. Green, ; Corey W. Speers,
| |
Collapse
|
11
|
Craig DJ, Ambrose S, Stanbery L, Walter A, Nemunaitis J. Systemic benefit of radiation therapy via abscopal effect. Front Oncol 2022; 12:987142. [PMID: 36387120 PMCID: PMC9641206 DOI: 10.3389/fonc.2022.987142] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/05/2022] [Indexed: 08/30/2023] Open
Abstract
Evidence of a systemic response related to localized radiation therapy (RT) in cancer management is rare. However, enhancing the immune response via immunotherapy followed by localized RT has shown evidence of tumor shrinkage to non-irradiated metastatic disease thereby inducing an "abscopal effect." Combined induction of the cGAS-STING pathway and activation of IFN-gamma signaling cascade related to RT within an activated immune environment promotes neoantigen presentation and expansion of cytotoxic effector cells enabling enhancement of systemic immune response. A proposed mechanism, case examples, and clinical trial evidence of "abscopal effect" benefit are reviewed. Results support strategic therapeutic testing to enhance "abscopal effect."
Collapse
Affiliation(s)
- Daniel J. Craig
- University of Toledo, Department of Internal Medicine, Toledo, OH, United States
| | | | - Laura Stanbery
- Medical Affairs, Gradalis, Inc., Carrollton, TX, United States
| | - Adam Walter
- Medical Affairs, Gradalis, Inc., Carrollton, TX, United States
- Gynecologic Oncology, Promedica, Toledo, OH, United States
| | - John Nemunaitis
- Medical Affairs, Gradalis, Inc., Carrollton, TX, United States
| |
Collapse
|
12
|
Miljanic M, Montalvo S, Aliru M, Song T, Leon-Camarena M, Innella K, Vujovic D, Komaki R, Iyengar P. The Evolving Interplay of SBRT and the Immune System, along with Future Directions in the Field. Cancers (Basel) 2022; 14:cancers14184530. [PMID: 36139689 PMCID: PMC9497192 DOI: 10.3390/cancers14184530] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/04/2022] [Accepted: 09/15/2022] [Indexed: 11/29/2022] Open
Abstract
Simple Summary We provide this commentary of stereotactic body radiotherapy (SBRT), and describe our evolving understanding of this treatment approach, its effects on the immune system, and the ability to stimulate immune cells to further recognize and attack cancer. The aim of this work is to describe our current knowledge of how SBRT effects the environment within the tumor and the immune cells present, whether timing the combination of this treatment with that of immunotherapy may have an impact on the body’s own immune response, and what the latest approaches in the field are in regards to this radiation treatment modality. Among these latest and exciting developments is Personalized Ultrafractionated Stereotactic Adaptive Radiation Therapy, known as PULSAR. This latest approach is described in detail herein, and may represent a leading novel method for adapting radiation treatments to treatment-induced tumor changes over time and stimulating the body’s immune response against tumor cells. Abstract In this commentary, we describe the potential of highly ablative doses utilizing Stereotactic Body Radiation Therapy (SBRT) in single or few fractions to enhance immune-responsiveness, how timing of this approach in combination with immune-checkpoint inhibitors may augment treatment-effect, and whether Personalized Ultrafractionated Stereotactic Adaptive Radiation Therapy (PULSAR) is an avenue for future advancement in the continued endeavor to foster a systemic effect of therapy beyond the radiation treatment field. The ablative potential of SBRT may support an increase in tumor-antigen presentation, enhancement of immune-stimulatory components, and an improvement in tumor-microenvironment immune cell infiltration. Furthermore, the latest advancement of ablative radiation delivery is PULSAR-based therapy, whereby ablative doses are delivered in pulses of treatment that may be several weeks apart, combined with adaptive treatment to tumor changes across time. The benefits of this novel approach include the ability to optimize direct tumor control by assessment of tumor size and location via dedicated imaging acquired prior to each delivered pulse, and further potentiation of immune recognition through combination with concurrent immune-checkpoint blockade.
Collapse
Affiliation(s)
- Mihailo Miljanic
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Correspondence:
| | - Steven Montalvo
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maureen Aliru
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tidie Song
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Maria Leon-Camarena
- Department of Internal Medicine, University of Texas at Austin, Austin, TX 78705, USA
| | - Kevin Innella
- Philadelphia College of Osteopathic Medicine, Philadelphia, PA 19131, USA
| | - Dragan Vujovic
- Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, New York, NY 10029, USA
| | - Ritsuko Komaki
- Emeritus Professor of Radiation Oncology, UT MDACC, Adjunct Professor of Radiation Oncology Baylor College of Medicine, Houston, TX 77030, USA
| | - Puneeth Iyengar
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| |
Collapse
|
13
|
Gill S, Nowak AK, Bowyer S, Endersby R, Ebert MA, Cook A. Clinical evidence for synergy between immunotherapy and radiotherapy (SITAR). J Med Imaging Radiat Oncol 2022; 66:881-895. [PMID: 35699321 PMCID: PMC9543060 DOI: 10.1111/1754-9485.13441] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/25/2022] [Indexed: 12/14/2022]
Abstract
Previous preclinical and clinical trials have shown promising antitumour activity and toxicity profile when employing the 'Synergy between Immunotherapy and Radiotherapy' (SITAR) strategy. Approximately, one in seven radiation therapy studies currently recruiting is investigating SITAR. This article reviews the range of cancers known to respond to immunotherapy and publications analysing SITAR. It sets the background for work that needs to be done in future clinical trials. It also reviews the potential toxicities of immunotherapy and discusses areas where caution is required when combining treatments.
Collapse
Affiliation(s)
- Suki Gill
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia.,University of Western Australia, Crawley, Western Australia, Australia
| | - Anna K Nowak
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia.,University of Western Australia, Crawley, Western Australia, Australia.,Institute for Respiratory Health, Nedlands, Western Australia, Australia
| | - Samantha Bowyer
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia.,University of Western Australia, Crawley, Western Australia, Australia
| | - Raelene Endersby
- University of Western Australia, Crawley, Western Australia, Australia.,Telethon Kids Institute, Nedlands, Western Australia, Australia
| | - Martin A Ebert
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia.,University of Western Australia, Crawley, Western Australia, Australia
| | - Alistair Cook
- University of Western Australia, Crawley, Western Australia, Australia.,Institute for Respiratory Health, Nedlands, Western Australia, Australia
| |
Collapse
|
14
|
Wen X, Shi C, Zeng X, Zhao L, Yao L, Liu Z, Feng L, Zhang D, Huang J, Li Y, Lin Q, Chen H, Zhuang R, Chen X, Zhang X, Guo Z. A paradigm of cancer immunotherapy based on 2-[18F]FDG and anti-PD-L1 mAb combination to enhance the anti-tumor effect. Clin Cancer Res 2022; 28:2923-2937. [PMID: 35320358 DOI: 10.1158/1078-0432.ccr-22-0159] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/24/2022] [Accepted: 03/21/2022] [Indexed: 11/16/2022]
Abstract
PURPOSE Efforts have been devoted to select eligible candidates for PD-1/PD-L1 immune checkpoint blocker (ICB) immunotherapy. Here, we have a serendipitous finding of positron emitting tomography (PET) imaging tracer 2-[18F]FDG as a potential immunomodulator. Therefore, we hypothesize that 2-[18F]FDG could induce PD-L1 expression change and create an immune-favorable microenvironment for tumor immunotherapy. EXPERIMENTAL DESIGN We designed a series of assays to verify PD-L1 upregulation, and tested immunotherapy regimens based on 2-[18F]FDG and anti-PD-L1 mAb, as monotherapy and in combination, in fully immunocompetent mice of MC38 and CT26 models. PD-L1 expression and tumor microenvironment (TME) changes were analyzed by western blot, transcriptomics study and flow-cytometric analysis. RESULTS PD-L1 was upregulated in a time- and dose-dependent manner after being induced by 2-[18F]FDG. The activation of NF-κB/IRF3 pathway and STAT1/3-IRF1 pathway play crucial parts in modulating PD-L1 expression after DNA damage and repair. Improved αPD-L1 mAb utilization rate and significant tumor growth delay were observed when the personalized therapeutic alliance of 2-[18F]FDG stimulation and ICB were employed. In addition, combination of 2-[18F]FDG with αPD-L1 mAb could reprogram a TME from "cold" to "hot", to make low immunoactivity tumors sensitive to ICB therapy. CONCLUSIONS In summary, this promising paradigm has the potential to expand the traditional tumor theranostics. [18F]FDG-based ICB immunotherapy is highly significant in enhancing anti-tumor effect.
Collapse
Affiliation(s)
| | | | | | - Liang Zhao
- First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Lanlin Yao
- First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Zhida Liu
- Shanxi Academy of Advanced Research and Innovation, Taiyuan, China
| | | | | | | | - Yesen Li
- Xiamen University, Xiamen, China
| | - Qin Lin
- First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Haojun Chen
- First Affiliated Hospital of Xiamen University, Xiamen, China
| | | | - Xiaoyuan Chen
- National University of Singapore, Sinagpore, Singapore
| | | | | |
Collapse
|
15
|
Sherer MV, Kotha NV, Williamson C, Mayadev J. Advances in immunotherapy for cervical cancer: recent developments and future directions. Int J Gynecol Cancer 2022; 32:281-287. [DOI: 10.1136/ijgc-2021-002492] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 12/14/2021] [Indexed: 01/01/2023] Open
Abstract
There is an unmet need for novel therapies to improve clinical outcomes for patients with locally advanced, recurrent, or metastatic cervical cancer. Most cases of cervical cancer are driven by infection with human papillomavirus (HPV), which uses multiple mechanisms to avoid immune surveillance. Several classes of agents have been developed that seek to activate the immune system in order to overcome this resistance and improve treatment outcomes. These include immune checkpoint inhibitors, therapeutic vaccines, engineered T cells, and antibody-drug conjugates. Here, we review the immune landscape of cervical cancer and the growing clinical data regarding the use of immunotherapy. Checkpoint inhibitors are the best studied treatments, with encouraging phase II studies available in the definitive setting and recently published phase III data defining a new standard of care for patients with recurrent or metastatic disease. Vaccines and engineered T cells are generally in earlier phases of development but use unique mechanisms of immune activation. It is possible that combination of immunotherapy, with either conventional systemic therapy or multiple immunomodulatory agents, may provide further benefit. We also discuss possible synergies between immunotherapy and radiation therapy, which is frequently used in the management of cervical cancer. Ultimately, immunotherapy represents an emerging treatment option for patients with cervical cancer. It is an appropriate component of first-line treatment in the recurrent or metastatic setting and may soon be incorporated into definitive management of locally advanced disease.
Collapse
|
16
|
Vilinovszki O, Andratschke N, Huellner M, Curioni-Fontecedro A, Kroeze SGC. True abscopal effect in a patient with metastatic non-small cell lung cancer. Radiat Oncol 2021; 16:194. [PMID: 34600561 PMCID: PMC8487536 DOI: 10.1186/s13014-021-01920-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 09/17/2021] [Indexed: 11/27/2022] Open
Abstract
Background Systemic response to local anticancer treatment is a phenomenon called ‘abscopal effect’. The immune system is thought to play a pivotal role in its occurrence. To date, several cases have been reported, particularly in patients receiving combined local treatment and immune checkpoint inhibitors. In such cases, it is impossible to discriminate between the effects of local and systemic treatment. Only a few cases of abscopal effect have been described with radiotherapy alone. Case presentation Here, we report on the case of an 81-year-old woman with recurrent metastatic squamous cell carcinoma of the lung with mediastinal tumor bulk, lymph node and bone metastases. The patient refused to undergo systemic treatment, and palliative stereotactic radiotherapy of the mediastinal tumor was performed. At restaging with FDG-PET/CT, the patient presented with a decrease in size and FDG-avidity both of the irradiated site and of the lymph node and bone metastases (which did not receive radiotherapy). At 25 months after radiotherapy, the patient is still in remission at all sites. Conclusions This is a rare case of an abscopal effect after radiotherapy as monotherapy. It is one of the few hitherto reported for lung cancer. Several ongoing studies with a combination of radiotherapy and immunotherapy are seeking to exploit a potential synergy to induce abscopal effects.
Collapse
Affiliation(s)
- Oliver Vilinovszki
- Department of Medical Oncology and Hematology, University Hospital Zurich, Zurich, Switzerland.
| | - Nicolaus Andratschke
- Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland.,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Martin Huellner
- Department of Nuclear Medicine, University Hospital Zurich, Zurich, Switzerland.,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Alessandra Curioni-Fontecedro
- Department of Medical Oncology and Hematology, University Hospital Zurich, Zurich, Switzerland.,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Stephanie G C Kroeze
- Department of Radiation Oncology, University Hospital Zurich, Zurich, Switzerland
| |
Collapse
|
17
|
Goff PH, Bhakuni R, Pulliam T, Lee JH, Hall ET, Nghiem P. Intersection of Two Checkpoints: Could Inhibiting the DNA Damage Response Checkpoint Rescue Immune Checkpoint-Refractory Cancer? Cancers (Basel) 2021; 13:3415. [PMID: 34298632 PMCID: PMC8307089 DOI: 10.3390/cancers13143415] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/04/2021] [Accepted: 07/05/2021] [Indexed: 12/19/2022] Open
Abstract
Metastatic cancers resistant to immunotherapy require novel management strategies. DNA damage response (DDR) proteins, including ATR (ataxia telangiectasia and Rad3-related), ATM (ataxia telangiectasia mutated) and DNA-PK (DNA-dependent protein kinase), have been promising therapeutic targets for decades. Specific, potent DDR inhibitors (DDRi) recently entered clinical trials. Surprisingly, preclinical studies have now indicated that DDRi may stimulate anti-tumor immunity to augment immunotherapy. The mechanisms governing how DDRi could promote anti-tumor immunity are not well understood; however, early evidence suggests that they can potentiate immunogenic cell death to recruit and activate antigen-presenting cells to prime an adaptive immune response. Merkel cell carcinoma (MCC) is well suited to test these concepts. It is inherently immunogenic as ~50% of patients with advanced MCC persistently benefit from immunotherapy, making MCC one of the most responsive solid tumors. As is typical of neuroendocrine cancers, dysfunction of p53 and Rb with upregulation of Myc leads to the very rapid growth of MCC. This suggests high replication stress and susceptibility to DDRi and DNA-damaging agents. Indeed, MCC tumors are particularly radiosensitive. Given its inherent immunogenicity, cell cycle checkpoint deficiencies and sensitivity to DNA damage, MCC may be ideal for testing whether targeting the intersection of the DDR checkpoint and the immune checkpoint could help patients with immunotherapy-refractory cancers.
Collapse
Affiliation(s)
- Peter H. Goff
- Department of Radiation Oncology, University of Washington, Seattle, WA 98195, USA;
| | - Rashmi Bhakuni
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA 98109, USA; (R.B.); (T.P.); (J.H.L.)
| | - Thomas Pulliam
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA 98109, USA; (R.B.); (T.P.); (J.H.L.)
| | - Jung Hyun Lee
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA 98109, USA; (R.B.); (T.P.); (J.H.L.)
- Institute for Stem Cell and Regenerative Medicine, Department of Bioengineering, University of Washington, Seattle, WA 98109, USA
| | - Evan T. Hall
- Division of Medical Oncology, Department of Medicine, University of Washington, Seattle, WA 98109, USA;
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| | - Paul Nghiem
- Division of Dermatology, Department of Medicine, University of Washington, Seattle, WA 98109, USA; (R.B.); (T.P.); (J.H.L.)
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA
| |
Collapse
|
18
|
Lai JZ, Zhu YY, Liu Y, Zhou LL, Hu L, Chen L, Zhang QY. Abscopal Effects of Local Radiotherapy Are Dependent on Tumor Immunogenicity. Front Oncol 2021; 11:690188. [PMID: 34249740 PMCID: PMC8264447 DOI: 10.3389/fonc.2021.690188] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 06/02/2021] [Indexed: 01/10/2023] Open
Abstract
Although abscopal tumor regression remains a rare phenomenon, interest in exploiting how radiation stimulates the immune system to induce systemic abscopal response is increasing. Here, we tested the hypothesis that tumor immunogenicity determined the ability of radiotherapy to induce abscopal effects. We established highly (MC-38 and E.G7-OVA) or poorly (LL/2 and B16-F10) immunogenic tumor models in this study and treated them with sham radiation, a single dose of 15 Gy, or three fractions of 5 Gy on three consecutive days. Alterations in the tumor microenvironment after radiation were examined by flow cytometry and RNA sequencing. Our results demonstrated the positive correlation between tumor immunogenicity and the abscopal effect of radiotherapy. The single dose of 15 Gy radiation was an effective regimen for inducing abscopal effects in highly immunogenic tumors. Local radiation reshaped the tumor microenvironment of irradiated and non-irradiated distant tumors by increasing CD8 T-cell infiltration and reducing suppressive immune cell accumulation. However, radiation alone was insufficient to elicit abscopal effects in poorly immunogenic tumors. No significant alterations were detected in the non-irradiated distant tumor microenvironment after radiation of poorly immunogenic tumors. In addition, tumor immunogenic subtypes were associated with the radiological response and clinical outcome of patients receiving radiotherapy. These findings indicated that tumor immunogenicity was the dominant characteristic that could predict the abscopal effect of radiotherapy. Our study provides an in-depth understanding of the immunological mechanisms involved in abscopal effects and highlights the impact of tumor heterogeneity on the therapeutic efficacy of radiotherapy and their combination with immunotherapy in clinical trials.
Collapse
Affiliation(s)
- Jin-Zhi Lai
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China.,Department of Oncology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Yan-Yang Zhu
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| | - Ying Liu
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| | - Lin-Lin Zhou
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| | - Li Hu
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| | - Ling Chen
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| | - Qiu-Yu Zhang
- Institute of Immunotherapy, Fujian Medical University, Fuzhou, China
| |
Collapse
|
19
|
Rückert M, Flohr AS, Hecht M, Gaipl US. Radiotherapy and the immune system: More than just immune suppression. STEM CELLS (DAYTON, OHIO) 2021; 39:1155-1165. [PMID: 33961721 DOI: 10.1002/stem.3391] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/20/2021] [Indexed: 11/07/2022]
Abstract
Radiotherapy (RT) is still one of the standard cancer therapies, with up to two third of all cancer patients with solid tumors being irradiated in the course of their disease. The aim of using ionizing radiation in fractionated treatment schedules was always to achieve local tumor control by inducing DNA damage which can be repaired by surrounding normal tissue but leads to cell death in tumor cells. Meanwhile, it is known that RT also has immunological effects reshaping the tumor microenvironment. Nevertheless, RT alone often fails to elicit potent antitumor immune responses as these effects can be immunostimulatory as well as immunosuppressive. Here, we discuss how immunotherapies can be exploited in combined therapies to boost RT-induced antitumor immune responses or to counteract preexisting and RT-mediated immunosuppression to improve local and systemic tumor control. Furthermore, we highlight some parameters of radioimmunotherapies (RITs) which are under investigation for potential optimizations and how RIT approaches are tested in first phases II and III trials. Finally, we discuss how RT might affect normal and cancer stem cells.
Collapse
Affiliation(s)
- Michael Rückert
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Ann-Sophie Flohr
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Markus Hecht
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Deutsches Zentrum Immuntherapie, Erlangen, Germany
| | - Udo S Gaipl
- Translational Radiobiology, Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Deutsches Zentrum Immuntherapie, Erlangen, Germany
| |
Collapse
|
20
|
Shan Z, Wang H, Zhang Y, Min W. The Role of Tumor-Derived Exosomes in the Abscopal Effect and Immunotherapy. Life (Basel) 2021; 11:life11050381. [PMID: 33922480 PMCID: PMC8145657 DOI: 10.3390/life11050381] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 04/17/2021] [Accepted: 04/19/2021] [Indexed: 01/08/2023] Open
Abstract
Exosomes are microvesicles that can be secreted by various cells and carry a variety of contents; thus, they play multiple biological functions. For instance, the tumor-derived exosomes (TEXs) have been proven to have the effect of immunostimulatory in addition to immunosuppression, making TEXs attractive in clinical immunotherapy and targeted therapy for cancer patients. In addition, TEXs as biomarkers have important clinical diagnostic and prognostic value. Recently, TEXs have been recognized to play important roles in the abscopal effect (AbE), a newly discovered mechanism by which the distant tumors are effectively targeted and repressed during immunotherapy and radiotherapy. Therefore, TEXs has demonstrated great clinical potential in the diagnosis, prognosis and treatment of cancer patients in the future. This review summarizes and discusses the role of TEXs in clinical therapy and their role in AbE in recent studies.
Collapse
Affiliation(s)
- Zechen Shan
- Academy of Queen Mary, Nanchang University, Nanchang 330000, China; (Z.S.); (Y.Z.)
| | - Hongmei Wang
- School of Basic Medical Sciences, Nanchang University, Nanchang 330000, China
- Correspondence: (H.W.); (W.M.)
| | - Yujuan Zhang
- Academy of Queen Mary, Nanchang University, Nanchang 330000, China; (Z.S.); (Y.Z.)
- School of Basic Medical Sciences, Nanchang University, Nanchang 330000, China
| | - Weiping Min
- Academy of Queen Mary, Nanchang University, Nanchang 330000, China; (Z.S.); (Y.Z.)
- School of Basic Medical Sciences, Nanchang University, Nanchang 330000, China
- Department of Surgery, Pathology and Oncology, University of Western Ontario, London, ON N6A 5A5, Canada
- Correspondence: (H.W.); (W.M.)
| |
Collapse
|
21
|
Lim AM, Cavanagh K, Hicks RJ, McLean L, Goh MS, Webb A, Rischin D. Delayed Response After Confirmed Progression (DR) and Other Unique Immunotherapy-Related Treatment Concepts in Cutaneous Squamous Cell Carcinoma. Front Oncol 2021; 11:656611. [PMID: 33937066 PMCID: PMC8081898 DOI: 10.3389/fonc.2021.656611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/22/2021] [Indexed: 12/24/2022] Open
Abstract
Non-melanoma skin cancers are one of the most common cancers diagnosed worldwide, with the highest incidence in Australia and New Zealand. Systemic treatment of locally advanced and metastatic cutaneous squamous cell carcinomas has been revolutionized by immune checkpoint inhibition with PD-1 blockade. We highlight treatment issues distinct to the management of the disease including expansion of the traditional concept of pseudoprogression and describe delayed responses after immune-specific response criteria confirmed progressive disease with and without clinical deterioration. We term this phenomenon “delayed response after confirmed progression (DR)”. We also discuss the common development of second primary tumors, heterogeneous disease responses, and expanding clinical boundaries for immunotherapy use.
Collapse
Affiliation(s)
- Annette M Lim
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, VIC, Australia
| | - Karda Cavanagh
- Department of Cancer Imaging, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Rodney J Hicks
- Department of Nuclear Medicine, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Luke McLean
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Michelle S Goh
- Department of Dermatology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Angela Webb
- Department of Plastic Surgery, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
| | - Danny Rischin
- Department of Medical Oncology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, VIC, Australia
| |
Collapse
|
22
|
Demaria S, Guha C, Schoenfeld J, Morris Z, Monjazeb A, Sikora A, Crittenden M, Shiao S, Khleif S, Gupta S, Formenti SC, Vikram B, Coleman CN, Ahmed MM. Radiation dose and fraction in immunotherapy: one-size regimen does not fit all settings, so how does one choose? J Immunother Cancer 2021; 9:jitc-2020-002038. [PMID: 33827904 PMCID: PMC8031689 DOI: 10.1136/jitc-2020-002038] [Citation(s) in RCA: 135] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2021] [Indexed: 12/12/2022] Open
Abstract
Recent evidence indicates that ionizing radiation can enhance immune responses to tumors. Advances in radiation delivery techniques allow hypofractionated delivery of conformal radiotherapy. Hypofractionation or other modifications of standard fractionation may improve radiation’s ability to promote immune responses to tumors. Other novel delivery options may also affect immune responses, including T-cell activation and tumor-antigen presentation changes. However, there is limited understanding of the immunological impact of hypofractionated and unique multifractionated radiotherapy regimens, as these observations are relatively recent. Hence, these differences in radiotherapy fractionation result in distinct immune-modulatory effects. Radiation oncologists and immunologists convened a virtual consensus discussion to identify current deficiencies, challenges, pitfalls and critical gaps when combining radiotherapy with immunotherapy and making recommendations to the field and advise National Cancer Institute on new directions and initiatives that will help further development of these two fields. This commentary aims to raise the awareness of this complexity so that the need to study radiation dose, fractionation, type and volume is understood and valued by the immuno-oncology research community. Divergence of approaches and findings between preclinical studies and clinical trials highlights the need for evaluating the design of future clinical studies with particular emphasis on radiation dose and fractionation, immune biomarkers and selecting appropriate end points for combination radiation/immune modulator trials, recognizing that direct effect on the tumor and potential abscopal effect may well be different. Similarly, preclinical studies should be designed as much as possible to model the intended clinical setting. This article describes a conceptual framework for testing different radiation therapy regimens as separate models of how radiation itself functions as an immunomodulatory ‘drug’ to provide alternatives to the widely adopted ‘one-size-fits-all’ strategy of frequently used 8 Gy×3 regimens immunomodulation.
Collapse
Affiliation(s)
- Sandra Demaria
- Department of Radiation Oncology, Weill Cornell Medical College, New York, New York, USA
| | - Chandan Guha
- Radiation Oncology, Pathology and Urology, and Institute of Onco-Physics, Montefiore Hospital and Medical Center, Bronx, New York, USA
| | - Jonathan Schoenfeld
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA
| | - Zachary Morris
- Human Oncology, University of Wisconsin Madison School of Medicine and Public Health, Madison, Wisconsin, USA
| | - Arta Monjazeb
- Radiation Oncology, UC Davis, Davis, California, USA
| | - Andrew Sikora
- Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Marka Crittenden
- Department of Radiation Oncology, Providence Portland Medical Center, Portland, Oregon, USA
| | - Stephen Shiao
- Radiation Oncology, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Samir Khleif
- The Loop Immuno-Oncology Laboratory, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Seema Gupta
- The Loop Immuno-Oncology Laboratory, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Silvia Chiara Formenti
- Department of Radiation Oncology, Weill Cornell Medical College, New York, New York, USA
| | - Bhadrasain Vikram
- Radiation Research Program, National Cancer Institute Division of Cancer Treatment and Diagnosis, Bethesda, Maryland, USA
| | - C Norman Coleman
- Radiation Research Program, National Cancer Institute Division of Cancer Treatment and Diagnosis, Bethesda, Maryland, USA
| | - Mansoor M Ahmed
- Radiation Research Program, National Cancer Institute Division of Cancer Treatment and Diagnosis, Bethesda, Maryland, USA
| |
Collapse
|
23
|
Kazandjian D, Dew A, Hill E, Ramirez EG, Morrison C, Mena E, Lindenberg L, Yuan C, Maric I, Wang HW, Calvo K, Dulau-Florea A, Roswarski J, Emanuel M, Braylan R, Turkbey B, Choyke P, Camphausen K, Stetler-Stevenson M, Steinberg SM, Figg WD, C Jones J. Avelumab, a PD-L1 Inhibitor, in Combination with Hypofractionated Radiotherapy and the Abscopal Effect in Relapsed Refractory Multiple Myeloma. Oncologist 2021; 26:288-e541. [PMID: 33554406 PMCID: PMC8018315 DOI: 10.1002/onco.13712] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/01/2021] [Indexed: 12/23/2022] Open
Abstract
Lessons Learned Despite the initial optimism for using immune checkpoint inhibition in the treatment of multiple myeloma, subsequent clinical studies have been disappointing. Preclinical studies have suggested that priming the immune system with various modalities in addition to checkpoint inhibition may overcome the relative T‐cell exhaustion or senescence; however, in this small data set, radiotherapy with checkpoint inhibition did not appear to activate the antitumor immune response.
Background Extramedullary disease (EMD) is recognized as an aggressive subentity of multiple myeloma (MM) with a need for novel therapeutic approaches. We therefore designed a proof‐of‐principle pilot study to evaluate the synergy between the combination of the anti–PD‐L1, avelumab, and concomitant hypofractionated radiotherapy. Methods This was a single‐arm phase II Simon two‐stage single center study that was prematurely terminated because of the COVID‐19 pandemic after enrolling four patients. Key eligibility included patients with relapsed/refractory multiple myeloma (RRMM) who had exhausted or were not candidates for standard therapy and had at least one lesion amenable to radiotherapy. Patients received avelumab until progression or intolerable toxicity and hypofractionated radiotherapy to a focal lesion in cycle 2. Radiotherapy was delayed until cycle 2 to allow the avelumab to reach a study state, given the important observation from previous studies that concomitant therapy is needed for the abscopal effect. Results At a median potential follow‐up of 10.5 months, there were no objective responses, one minimal response, and two stable disease as best response. The median progression‐free survival (PFS) was 5.3 months (95% confidence interval [CI]: 2.5–7.1 months), and no deaths occurred. There were no grade ≥3 and five grade 1–2 treatment‐related adverse events. Conclusion Avelumab in combination with radiotherapy for patients with RRMM and EMD was associated with very modest systemic clinical benefit; however, patients did benefit as usual from local radiotherapy. Furthermore, the combination was very well tolerated compared with historical RRMM treatment regimens.
Collapse
Affiliation(s)
- Dickran Kazandjian
- Multiple Myeloma Program, Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.,Myeloma Program, Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida, USA
| | - Alexander Dew
- Multiple Myeloma Program, Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.,Hematology-Oncology Department, John P. Murtha Cancer Center, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
| | - Elizabeth Hill
- Multiple Myeloma Program, Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Elizabeth Gil Ramirez
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Candis Morrison
- Multiple Myeloma Program, Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Esther Mena
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Liza Lindenberg
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Constance Yuan
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Irina Maric
- Hematology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, Maryland, USA
| | - Hao-Wei Wang
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Katherine Calvo
- Hematology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, Maryland, USA
| | - Alina Dulau-Florea
- Hematology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, Maryland, USA
| | - Joseph Roswarski
- Multiple Myeloma Program, Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.,Hematology-Oncology Department, John P. Murtha Cancer Center, Walter Reed National Military Medical Center, Bethesda, Maryland, USA
| | - Michael Emanuel
- Office Research Nursing, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Raul Braylan
- Hematology Service, Department of Laboratory Medicine, National Institutes of Health, Bethesda, Maryland, USA
| | - Baris Turkbey
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Peter Choyke
- Molecular Imaging Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Kevin Camphausen
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Maryalice Stetler-Stevenson
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Seth M Steinberg
- Biostatistics & Data Management Section, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - William D Figg
- Molecular Pharmacology Section, Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Jennifer C Jones
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA.,Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| |
Collapse
|
24
|
Nunno VD, Nuvola G, Mosca M, Maggio I, Gatto L, Tosoni A, Lodi R, Franceschi E, Brandes AA. Clinical efficacy of immune checkpoint inhibitors in patients with brain metastases. Immunotherapy 2021; 13:419-432. [PMID: 33472433 DOI: 10.2217/imt-2020-0208] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Brain metastases (BMs) represent a negative prognostic factor for patients with solid malignancies. BMs are generally approached with loco-regional treatments and the blood-brain barrier limits the efficacy of some systemic drugs. The aim of this review is to summarize current knowledge about the role of immune checkpoint inhibitors for the management of brain metastases in patients with solid malignancies. We performed a review of available literature. Immune checkpoint inhibitors represent the standard treatment for several advanced solid malignancies. However, with the exception of melanoma their clinical role in other solid malignancies is not completely clear due to the exclusion of patients with BM from approval clinical trials. Immune-checkpoint inhibitors may be an effective treatment of brain metastases of melanoma while their clinical role on brain metastases from other solid malignancies is uncertain.
Collapse
Affiliation(s)
| | - Giacomo Nuvola
- Department of Specialized, Experimental & Diagnostic Medicine, S. Orsola-Malpighi University Hospital, Alma Mater Studiorum University of Bologna
| | - Mirta Mosca
- Department of Specialized, Experimental & Diagnostic Medicine, S. Orsola-Malpighi University Hospital, Alma Mater Studiorum University of Bologna
| | - Ilaria Maggio
- Department of Medical Oncology, Azienda USL, Bologna, Italy
| | - Lidia Gatto
- Department of Medical Oncology, Azienda USL, Bologna, Italy
| | - Alicia Tosoni
- Department of Medical Oncology, Azienda USL, Bologna, Italy
| | - Raffaele Lodi
- IRCCS Istituto delle Scienze Neurologiche di Bologna
| | | | | |
Collapse
|
25
|
Schubert P, Rutzner S, Eckstein M, Frey B, Schweizer C, Haderlein M, Lettmaier S, Semrau S, Gostian AO, Zhou JG, Gaipl US, Fietkau R, Hecht M. Prospective Evaluation of All-lesion Versus Single-lesion Radiotherapy in Combination With PD-1/PD-L1 Immune Checkpoint Inhibitors. Front Oncol 2020; 10:576643. [PMID: 33251140 PMCID: PMC7673414 DOI: 10.3389/fonc.2020.576643] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 10/08/2020] [Indexed: 12/25/2022] Open
Abstract
Background Local ablative treatments improve survival in patients with oligometastatic disease in addition to chemotherapy. The application of immune checkpoint inhibitors prolonged patients’ survival in different tumor entities. This raises the question if patients still benefit from intensified local treatments in combination with a more efficient systemic treatment with immune checkpoint inhibitors. Methods The prospective non-interventional ST-ICI trial investigates treatment with PD-1/PD-L1 (Programmed cell death protein 1/Programmed cell death 1 ligand 1) immune checkpoint inhibitors and radiotherapy in different tumor entities. Patients who started radiotherapy and immunotherapy concomitantly were included in this interim analysis. In this cohort patients with all-lesion radiotherapy (all tumor lesions irradiated, al-RT) were compared to patients with radiotherapy to only a single of their tumor lesions (single-lesion radiotherapy, sl-RT). Endpoints of the interim analysis were progression-free survival (PFS), overall survival (OS) and time to progression (TTP). Results A total of 104 patients were registered between April 2017 and August 2019. Fifty patients started immune checkpoint inhibitor treatment and radiotherapy concomitantly and were included. Most frequent tumor entities were non-small cell lung cancer (62%) followed by head and neck squamous cell cancer (26%). Most frequent location of radiotherapy was lung (34%) and central nervous system (20%). Median duration of follow-up was 8.6 months beginning with first administration of the immune-checkpoint-inhibitor. Median PFS was 9.2 months (95% CI, 5.8 – 12.6) in the al-RT group and 3.0 months (95% CI, 2.5 – 3.5) in the sl-RT group (p<0.001). Median OS was 11.6 months (95% CI, 8.1 - 15.1) in the al-RT group and 4.2 months (95% CI, 3.0 - 5.4) in the sl-RT group (p=0.007). Median TTP was not reached in the al-RT group compared to 4.6 months (95% CI, 1.1–8.0) in the sl-RT group (p=0.028). Univariate Cox regression analyses computed tumor entity, histology, central nervous system metastases, immunotherapy drug and al-RT as predictors of OS (with an effect p-value of ≤ 0.1). In the multivariable analysis only tumor entity and al-RT remained prognostic factors for OS. Conclusion Patients with PD-1/PD-L1 immune checkpoint inhibitor therapy benefit from local radiotherapy to all known lesions compared to single-lesion radiotherapy regarding PFS and OS.
Collapse
Affiliation(s)
- Philipp Schubert
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Sandra Rutzner
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Markus Eckstein
- Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Institute of Pathology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Benjamin Frey
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Claudia Schweizer
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Marlen Haderlein
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Sebastian Lettmaier
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Sabine Semrau
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Antoniu-Oreste Gostian
- Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Department of Otolaryngology-Head & Neck Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Jian-Guo Zhou
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany.,Department of Oncology, The Second Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Udo S Gaipl
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Rainer Fietkau
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| | - Markus Hecht
- Department of Radiation Oncology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Comprehensive Cancer Center Erlangen-EMN, Erlangen, Germany
| |
Collapse
|