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Shanmugasundaram KB, Ahmed E, Miao X, Kulasinghe A, Fletcher JA, Monkman J, Mainwaring P, Masud MK, Park H, Hossain MSA, Yamauchi Y, Sina AAI, O'Byrne K, Wuethrich A, Trau M. A Mesoporous Gold Sensor Unveils Phospho PD-L1 in Extracellular Vesicles as a Proxy for PD-L1 Expression in Lung Cancer Tissue. ACS Sens 2024; 9:3009-3016. [PMID: 38836608 DOI: 10.1021/acssensors.4c00192] [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] [Indexed: 06/06/2024]
Abstract
Immune checkpoint inhibitors (ICIs) targeting programmed cell death ligand 1 (PD-L1), or its receptor, PD-1 have improved survival in patients with non-small-cell lung cancer (NSCLC). Assessment of PD-L1 expression requires tissue biopsy or fine needle aspiration that are currently used to identify patients most likely to respond to single agent anti-PD-1/PD-L1 therapy. However, obtaining sufficient tissue to generate a PD-L1 tissue proportion score (TPS) ≥ 50% using immunohistochemistry remains a challenge that potentially may be overcome by liquid biopsies. This study utilized a mesoporous gold sensor (MGS) assay to examine the phosphorylation status of PD-L1 in plasma extracellular vesicles (EV pPD-L1) and PD-L1 levels in plasma from NSCLC patient samples and their association with tumor PD-L1 TPS. The 3-dimensional mesoporous network of the electrodes provides a large surface area, high signal-to-noise ratio, and a superior electro-conductive framework, thereby significantly improving the detection sensitivity of PD-L1 nanosensing. Test (n = 20) (Pearson's r = 0.99) and validation (n = 45) (Pearson's r = 0.99) cohorts show that EV pPD-L1 status correlates linearly with the tumor PD-L1 TPS assessed by immunohistochemistry irrespective of the tumor stage, with 64% of patients overall showing detectable EV pPD-L1 levels in plasma. In contrast to the EV pPD-L1 results, plasma PD-L1 levels did not correlate with the tumor PD-L1 TPS score or EV pPD-L1 levels. These data demonstrate that EV pPD-L1 levels may be used to select patients for appropriate PD-1 and PD-L1 ICI therapy regimens in early, locally advanced, and advanced NSCLC and should be tested further in randomized controlled trials. Most importantly, the assay used has a less than 24h turnaround time, facilitating adoption of the test into the routine diagnostic evaluation of patients prior to therapy.
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Affiliation(s)
- Karthik B Shanmugasundaram
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Emtiaz Ahmed
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Xinzhe Miao
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Arutha Kulasinghe
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia
| | - James A Fletcher
- Division of Cancer Services, Princess Alexandra Hospital, Woolloongabba, QLD 4102, Australia
| | - James Monkman
- Frazer Institute, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4102, Australia
| | - Paul Mainwaring
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Mostafa Kamal Masud
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hyeongyu Park
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Md Shahriar A Hossain
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
- School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yusuke Yamauchi
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Abu A I Sina
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kenneth O'Byrne
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4102, Australia
| | - Alain Wuethrich
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Matt Trau
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
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2
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Tsai YT, Schlom J, Donahue RN. Blood-based biomarkers in patients with non-small cell lung cancer treated with immune checkpoint blockade. J Exp Clin Cancer Res 2024; 43:82. [PMID: 38493133 PMCID: PMC10944611 DOI: 10.1186/s13046-024-02969-1] [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: 12/05/2023] [Accepted: 01/30/2024] [Indexed: 03/18/2024] Open
Abstract
The paradigm of non-small cell lung cancer (NSCLC) treatment has been profoundly influenced by the development of immune checkpoint inhibitors (ICI), but the range of clinical responses observed among patients poses significant challenges. To date, analyses of tumor biopsies are the only parameter used to guide prognosis to ICI therapy. Tumor biopsies, however, are often difficult to obtain and tissue-based biomarkers are limited by intratumoral heterogeneity and temporal variability. In response, there has been a growing emphasis on the development of "liquid biopsy"‒ derived biomarkers, which offer a minimally invasive means to dynamically monitor the immune status of NSCLC patients either before and/or during the course of treatment. Here we review studies in which multiple blood-based biomarkers encompassing circulating soluble analytes, immune cell subsets, circulating tumor DNA, blood-based tumor mutational burden, and circulating tumor cells have shown promising associations with the clinical response of NSCLC patients to ICI therapy. These investigations have unveiled compelling correlations between the peripheral immune status of patients both before and during ICI therapy and patient outcomes, which include response rates, progression-free survival, and overall survival. There is need for rigorous validation and standardization of these blood-based assays for broader clinical application. Integration of multiple blood-based biomarkers into comprehensive panels or algorithms also has the potential to enhance predictive accuracy. Further research aimed at longitudinal monitoring of circulating biomarkers is also crucial to comprehend immune dynamics and resistance mechanisms and should be used alongside tissue-based methods that interrogate the tumor microenvironment to guide treatment decisions and may inform on the development of novel therapeutic strategies. The data reviewed here reinforce the opportunity to refine patient stratification, optimize treatments, and improve outcomes not only in NSCLC but also in the wider spectrum of solid tumors undergoing immunotherapy.
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Affiliation(s)
- Yo-Ting Tsai
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jeffrey Schlom
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.
| | - Renee N Donahue
- Center for Immuno-Oncology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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Mogavero A, Cantale O, Mollica V, Anpalakhan S, Addeo A, Mountzios G, Friedlaender A, Kanesvaran R, Novello S, Banna GL. First-line immunotherapy in non-small cell lung cancer: how to select and where to go. Expert Rev Respir Med 2023; 17:1191-1206. [PMID: 38294292 DOI: 10.1080/17476348.2024.2302356] [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] [Received: 06/11/2023] [Accepted: 01/03/2024] [Indexed: 02/01/2024]
Abstract
INTRODUCTION Immunotherapy (IO) has established a new milestone in lung cancer treatment. Several registrational studies have approved immune checkpoint inhibitors (ICIs) in different settings, including the metastatic nonsmall cell lung cancer (NSCLC). As well known, responders are just a certain proportion of patients; therefore, their selection by using predictive factors has stood out as a crucial issue to address in tailoring a patient-centered care. AREAS COVERED In our review we propose a detailed yet handy cross section on ICIs as first-line treatment in metastatic NSCLC, regarding indications, histological, clinical, and blood-based biomarkers, other than their mechanisms of resistance and new immunological actionable targets. We performed a literature search through PubMed entering keywords complying with crucial features of immunotherapy. EXPERT OPINION IO represents the backbone of lung cancer treatment. Trials are currently testing novel immune blockade agents assessing combinatorial approaches with standard ICIs, or antibody drug conjugates (ADC), harboring immunological targets. Perfecting patients' selection is an ongoing challenge and a more and more urgent need in order to best predict responders who will consistently benefit from it.
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Affiliation(s)
| | | | - Veronica Mollica
- Medical Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - Shobana Anpalakhan
- Department of Oncology, Portsmouth Hospitals University NHS Trust, Portsmouth, UK
| | - Alfredo Addeo
- Oncology Department, HUG-Hopitaux Universitaires de Geneve, Geneva, Switzerland
| | - Giannis Mountzios
- Fourth Oncology Department and Clinical Trials Unit, Henry Dunant Hospital Center, Athens, Greece
| | | | - Ravindran Kanesvaran
- Division of Medical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- SingHealth Duke-NUS Oncology Academic Clinical Programme, Duke-NUS Medical School, Singapore, Singapore
| | - Silvia Novello
- Department of Oncology, University of Turin, Turin, Italy
| | - Giuseppe Luigi Banna
- Department of Oncology, Portsmouth Hospitals University NHS Trust, Portsmouth, UK
- Science and Health, School of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK
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Dal Collo G, Takam Kamga P. Unlocking the Potential of Biomarkers for Immune Checkpoint Inhibitors in Cancer Therapy. Cancers (Basel) 2023; 15:4503. [PMID: 37760473 PMCID: PMC10526481 DOI: 10.3390/cancers15184503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 09/08/2023] [Indexed: 09/29/2023] Open
Abstract
Immune checkpoint inhibitors (ICIs) are pharmaceutical agents capable of disrupting immune checkpoint signaling, leading to T-cell activation and a robust anti-tumor response [...].
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Affiliation(s)
- Giada Dal Collo
- Department of Immunology, Erasmus University Medical Center, 3015 GD Rotterdam, The Netherlands;
| | - Paul Takam Kamga
- EA4340 BECCOH, Université Paris-Saclay, UVSQ92100 Boulogne-Billancourt, France
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Ancel J, Dormoy V, Raby BN, Dalstein V, Durlach A, Dewolf M, Gilles C, Polette M, Deslée G. Soluble biomarkers to predict clinical outcomes in non-small cell lung cancer treated by immune checkpoints inhibitors. Front Immunol 2023; 14:1171649. [PMID: 37283751 PMCID: PMC10239865 DOI: 10.3389/fimmu.2023.1171649] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/11/2023] [Indexed: 06/08/2023] Open
Abstract
Lung cancer remains the first cause of cancer-related death despite many therapeutic innovations, including immune checkpoint inhibitors (ICI). ICI are now well used in daily practice at late metastatic stages and locally advanced stages after a chemo-radiation. ICI are also emerging in the peri-operative context. However, all patients do not benefit from ICI and even suffer from additional immune side effects. A current challenge remains to identify patients eligible for ICI and benefiting from these drugs. Currently, the prediction of ICI response is only supported by Programmed death-ligand 1 (PD-L1) tumor expression with perfectible results and limitations inherent to tumor-biopsy specimen analysis. Here, we reviewed alternative markers based on liquid biopsy and focused on the most promising biomarkers to modify clinical practice, including non-tumoral blood cell count such as absolute neutrophil counts, platelet to lymphocyte ratio, neutrophil to lymphocyte ratio, and derived neutrophil to lymphocyte ratio. We also discussed soluble-derived immune checkpoint-related products such as sPD-L1, circulating tumor cells (detection, count, and marker expression), and circulating tumor DNA-related products. Finally, we explored perspectives for liquid biopsies in the immune landscape and discussed how they could be implemented into lung cancer management with a potential biological-driven decision.
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Affiliation(s)
- Julien Ancel
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
| | - Valérian Dormoy
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
| | - Béatrice Nawrocki Raby
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
| | - Véronique Dalstein
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
- Department of Biopathology, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
| | - Anne Durlach
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
- Department of Biopathology, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
| | - Maxime Dewolf
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
| | - Christine Gilles
- Laboratory of Tumor and Development Biology, GIGA-Cancer, University of Liège, Liège, Belgium
| | - Myriam Polette
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
- Department of Biopathology, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
| | - Gaëtan Deslée
- Inserm UMR-S1250, P3Cell, University of Reims Champagne-Ardenne, SFR CAP-SANTE, Reims, France
- Department of Respiratory Diseases, Centre Hospitalier Universitaire de Reims, Hôpital Maison Blanche, Reims, France
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Zhou K, Li S, Zhao Y, Cheng K. Mechanisms of drug resistance to immune checkpoint inhibitors in non-small cell lung cancer. Front Immunol 2023; 14:1127071. [PMID: 36845142 PMCID: PMC9944349 DOI: 10.3389/fimmu.2023.1127071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 01/30/2023] [Indexed: 02/10/2023] Open
Abstract
Immune checkpoint inhibitors (ICIs) in the form of anti-CTLA-4 and anti-PD-1/PD-L1 have become the frontier of cancer treatment and successfully prolonged the survival of patients with advanced non-small cell lung cancer (NSCLC). But the efficacy varies among different patient population, and many patients succumb to disease progression after an initial response to ICIs. Current research highlights the heterogeneity of resistance mechanisms and the critical role of tumor microenvironment (TME) in ICIs resistance. In this review, we discussed the mechanisms of ICIs resistance in NSCLC, and proposed strategies to overcome resistance.
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Affiliation(s)
- Kexun Zhou
- Abdominal Oncology Ward, Division of Medical Oncology, Cancer Center, State Key Laboratory of Biological Therapy, West China Hospital, Sichuan University, Chengdu, China
- Abdominal Oncology Ward, Division of Radiation Oncology, Cancer Center, State Key Laboratory of Biological Therapy, West China Hospital, Sichuan University, Chengdu, China
| | - Shuo Li
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China
- Lung Cancer Center, West China Hospital Sichuan University, Chengdu, China
| | - Yi Zhao
- The First Clinical Medical College of Lanzhou University, Lanzhou University, Lanzhou, China
| | - Ke Cheng
- Abdominal Oncology Ward, Division of Medical Oncology, Cancer Center, State Key Laboratory of Biological Therapy, West China Hospital, Sichuan University, Chengdu, China
- Abdominal Oncology Ward, Division of Radiation Oncology, Cancer Center, State Key Laboratory of Biological Therapy, West China Hospital, Sichuan University, Chengdu, China
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7
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A LysLysLys-tag as trigger in polynorepinephrine epitope imprinting: The case study of soluble PD-L1 detection in serum by optical-based sensing. Biosens Bioelectron 2023; 220:114806. [DOI: 10.1016/j.bios.2022.114806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/27/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022]
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Emerging Blood-Based Biomarkers for Predicting Immunotherapy Response in NSCLC. Cancers (Basel) 2022; 14:cancers14112626. [PMID: 35681606 PMCID: PMC9179588 DOI: 10.3390/cancers14112626] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/17/2022] [Accepted: 05/20/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Treatment with immunotherapy has been established as a standard treatment for lung cancer in recent years. Unfortunately, still, only a small proportion of patients benefit from the treatment, being the first leading cause of cancer death worldwide. Therefore, there is an urgent need for predictive biomarkers to help clinicians to discern whose patients are more likely to respond to immunotherapy. Since liquid biopsy opens the door to select patients and monitor the response during the treatment in a non-invasive way, in this review, we focus on the most relevant and recent results based on blood soluble biomarkers. Abstract Immunotherapy with Immune Checkpoint Inhibitors (ICIs) has demonstrated a profitable performance for Non-Small Cell Lung Cancer (NSCLC) cancer treatment in some patients; however, there is still a percentage of patients in whom immunotherapy does not provide the desired results regarding beneficial outcomes. Therefore, obtaining predictive biomarkers for ICI response will improve the treatment management in clinical practice. In this sense, liquid biopsy appears as a promising method to obtain samples in a minimally invasive and non-biased way. In spite of its evident potential, the use of these circulating biomarkers is still very limited in the real clinical practice, mainly due to the huge heterogeneity among the techniques, the lack of consensus, and the limited number of patients included in these previous studies. In this work, we review the pros and cons of the different proposed biomarkers, such as soluble PD-L1, circulating non-coding RNA, circulating immune cells, peripheral blood cytokines, and ctDNA, obtained from liquid biopsy to predict response to ICI treatment at baseline and to monitor changes in tumor and tumor microenvironment during the course of the treatment in NSCLC patients.
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Wang T, Denman D, Bacot SM, Feldman GM. Challenges and the Evolving Landscape of Assessing Blood-Based PD-L1 Expression as a Biomarker for Anti-PD-(L)1 Immunotherapy. Biomedicines 2022; 10:1181. [PMID: 35625917 PMCID: PMC9138337 DOI: 10.3390/biomedicines10051181] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 02/05/2023] Open
Abstract
While promising, PD-L1 expression on tumor tissues as assessed by immunohistochemistry has been shown to be an imperfect biomarker that only applies to a limited number of cancers, whereas many patients with PD-L1-negative tumors still respond to anti-PD-(L)1 immunotherapy. Recent studies using patient blood samples to assess immunotherapeutic responsiveness suggests a promising approach to the identification of novel and/or improved biomarkers for anti-PD-(L)1 immunotherapy. In this review, we discuss the advances in our evolving understanding of the regulation and function of PD-L1 expression, which is the foundation for developing blood-based PD-L1 as a biomarker for anti-PD-(L)1 immunotherapy. We further discuss current knowledge and clinical study results for biomarker identification using PD-L1 expression on tumor and immune cells, exosomes, and soluble forms of PD-L1 in the peripheral blood. Finally, we discuss key challenges for the successful development of the potential use of blood-based PD-L1 as a biomarker for anti-PD-(L)1 immunotherapy.
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Affiliation(s)
- Tao Wang
- Office of Biotechnology Products, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, USA; (D.D.); (S.M.B.); (G.M.F.)
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10
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Fatima S, Ma Y, Safrachi A, Haider S, Spring KJ, Vafaee F, Scott KF, Roberts TL, Becker TM, de Souza P. Harnessing Liquid Biopsies to Guide Immune Checkpoint Inhibitor Therapy. Cancers (Basel) 2022; 14:1669. [PMID: 35406441 PMCID: PMC8997025 DOI: 10.3390/cancers14071669] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/18/2022] [Accepted: 03/22/2022] [Indexed: 12/24/2022] Open
Abstract
Immunotherapy (IO), involving the use of immune checkpoint inhibition, achieves improved response-rates and significant disease-free survival for some cancer patients. Despite these beneficial effects, there is poor predictability of response and substantial rates of innate or acquired resistance, resulting in heterogeneous responses among patients. In addition, patients can develop life-threatening adverse events, and while these generally occur in patients that also show a tumor response, these outcomes are not always congruent. Therefore, predicting a response to IO is of paramount importance. Traditionally, tumor tissue analysis has been used for this purpose. However, minimally invasive liquid biopsies that monitor changes in blood or other bodily fluid markers are emerging as a promising cost-effective alternative. Traditional biomarkers have limitations mainly due to difficulty in repeatedly obtaining tumor tissue confounded also by the spatial and temporal heterogeneity of tumours. Liquid biopsy has the potential to circumvent tumor heterogeneity and to help identifying patients who may respond to IO, to monitor the treatment dynamically, as well as to unravel the mechanisms of relapse. We present here a review of the current status of molecular markers for the prediction and monitoring of IO response, focusing on the detection of these markers in liquid biopsies. With the emerging improvements in the field of liquid biopsy, this approach has the capacity to identify IO-eligible patients and provide clinically relevant information to assist with their ongoing disease management.
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Affiliation(s)
- Shadma Fatima
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2031, Australia; (A.S.); (F.V.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Yafeng Ma
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- South Western Sydney Clinical School, UNSW, Sydney, NSW 2031, Australia
- Centre for Circulating Tumor Cell Diagnosis and Research, Ingham Institute for Applied Medical Research, Liverpool, NSW 2170, Australia
| | - Azadeh Safrachi
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2031, Australia; (A.S.); (F.V.)
| | - Sana Haider
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Kevin J. Spring
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Fatemeh Vafaee
- School of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney, NSW 2031, Australia; (A.S.); (F.V.)
- UNSW Data Science Hub, University of New South Wales, Sydney, NSW 2031, Australia
| | - Kieran F. Scott
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
| | - Tara L. Roberts
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
- South Western Sydney Clinical School, UNSW, Sydney, NSW 2031, Australia
| | - Therese M. Becker
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
- South Western Sydney Clinical School, UNSW, Sydney, NSW 2031, Australia
- Centre for Circulating Tumor Cell Diagnosis and Research, Ingham Institute for Applied Medical Research, Liverpool, NSW 2170, Australia
| | - Paul de Souza
- Department of Medical Oncology, Ingham Institute of Applied Medical Research, Liverpool, NSW 2170, Australia; (Y.M.); (S.H.); (K.J.S.); (K.F.S.); (T.L.R.); (T.M.B.); (P.d.S.)
- School of Medicine, Western Sydney University, Campbelltown, NSW 2560, Australia
- South Western Sydney Clinical School, UNSW, Sydney, NSW 2031, Australia
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11
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Niu M, Liu Y, Yi M, Jiao D, Wu K. Biological Characteristics and Clinical Significance of Soluble PD-1/PD-L1 and Exosomal PD-L1 in Cancer. Front Immunol 2022; 13:827921. [PMID: 35386715 PMCID: PMC8977417 DOI: 10.3389/fimmu.2022.827921] [Citation(s) in RCA: 49] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 02/21/2022] [Indexed: 12/12/2022] Open
Abstract
The immune checkpoint pathway consisting of the cell membrane-bound molecule programmed death protein 1 (PD-1) and its ligand PD-L1 has been found to mediate negative regulatory signals that effectively inhibit T-cell proliferation and function and impair antitumor immune responses. Considerable evidence suggests that the PD-1/PD-L1 pathway is responsible for tumor immune tolerance and immune escape. Blockage of this pathway has been found to reverse T lymphocyte depletion and restore antitumor immunity. Antagonists targeting this pathway have shown significant clinical activity in specific cancer types. Although originally identified as membrane-type molecules, several other forms of PD-1/PD-L1 have been detected in the blood of cancer patients, including soluble PD-1/PD-L1 (sPD-1/sPD-L1) and exosomal PD-L1 (exoPD-L1), increasing the composition and functional complications of the PD-1/PD-L1 signaling pathway. For example, sPD-1 has been shown to block the PD-1/PD-L immunosuppressive pathway by binding to PD-L1 and PD-L2, whereas the role of sPD-L1 and its mechanism of action in cancer remain unclear. In addition, many studies have investigated the roles of exoPD-L1 in immunosuppression, as a biomarker for tumor progression and as a predictive biomarker for response to immunotherapy. This review describes the molecular mechanisms underlying the generation of sPD-1/sPD-L1 and exoPD-L1, along with their biological activities and methods of detection. In addition, this review discusses the clinical importance of sPD-1/sPD-L1 and exoPD-L1 in cancer, including their predictive and prognostic roles and the effects of treatments that target these molecules.
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Affiliation(s)
- Mengke Niu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yiming Liu
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ming Yi
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dechao Jiao
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Kongming Wu, ; Dechao Jiao,
| | - Kongming Wu
- Department of Oncology, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Kongming Wu, ; Dechao Jiao,
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