The Biogenesis, Biology, and Clinical Significance of Exosomal PD-L1 in Cancer

The exosome serves as a trafficking vehicle for transport of programmed death-ligand 1 (PD-L1) into receptor cells. In tumor microenvironment, distant tumor cells can remotely attack activated T cells by exosomal PD-L1. Here, we summerize the biogenesis and transport process of exosomal PD-L1. Then, we focus on the cancer biology of exosomal PD-L1 in immunosuppression and the mechanism by which it inhibits T cells. Finally, we highlight the prospects of exosomal PD-L1 as a tumor biomarker and its significance in immunotherapy. In addition, we discuss the new challenges faced in researching and utilizing exosomal PD-L1. This review may shed light on the exosomal PD-L1 from the bench to the clinic. Exosomes serve as trafficking vehicles for transport of programmed death-ligand 1 (PD-L1) into receptor cells. In tumor microenvironment, distant tumor cells can remotely attack activated T cells through exosomal PD-L1. Here, we have summarized the biogenesis and transport of exosomal PD-L1. Next, we focused on the cancer biology of exosomal PD-L1 in immunosuppression and the mechanism by which it inhibits T cells. Finally, we highlighted the prospects of exosomal PD-L1 as a tumor biomarker and its significance in immunotherapy. In addition, we have discussed the new challenges faced in studying and utilizing exosomal PD-L1. This review may shed light on the translation of exosomal PD-L1 from bench to clinic.
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research

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Emerging immune therapy, such as with the anti–programmed cell death–1 (anti–PD-1) monoclonal antibody nivolumab, has shown efficacy in tumor suppression. Patients with terminal cancer suffer from cancer pain as a result of bone metastasis and bone destruction, but how PD-1 blockade affects bone cancer pain remains unknown. Here, we report that mice lacking Pdcd1 (Pd1−/−) demonstrated remarkable protection against bone destruction induced by femoral inoculation of Lewis lung cancer cells. Compared with WT mice, Pd1−/− mice exhibited increased baseline pain sensitivity, but the deve...
Source: Journal of Clinical Investigation - Category: Biomedical Science Authors: Source Type: research
Condition:   Locally Advanced Rectal Cancer Interventions:   Drug: PD-1 antibody;   Drug: Capecitabine;   Drug: Irinotecan;   Radiation: Neoadjuvant Radiotherapy Sponsor:   Fudan University Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Condition:   Locally Advanced Rectal Cancer Interventions:   Drug: PD-1 antibody;   Drug: Capecitabine;   Drug: Irinotecan;   Radiation: Neoadjuvant Radiotherapy Sponsor:   Fudan University Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Conditions:   p16INK4a Negative Oropharyngeal Squamous Cell Carcinoma;   Stage III Hypopharyngeal Squamous Cell Carcinoma AJCC v7;   Stage III Laryngeal Squamous Cell Carcinoma AJCC v6 and v7;   Stage III Oral Cavity Squamous Cell Carcinoma AJCC v6 and v7;   Stage III Oropharyngeal Squamous Cell Carcinoma AJCC v7;   Stage IV Hypopharyngeal Squamous Cell Carcinoma AJCC v7;   Stage IV Laryngeal Squamous Cell Carcinoma AJCC v7;   Stage IV Oral Cavity Squamous Cell Carcinoma AJCC v6 and v7;   Stage IV Oropharyngeal Squamous Cell Carcinoma AJCC v7;   Stage IVA Hypopharyngeal Squ...
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Basel, 2 June 2020 – Roche (SIX: RO, ROG; OTCQX: RHHBY) today announced that the US Food and Drug Administration (FDA) has approved Tecentriq® (atezolizumab) in combination with Avastin® (bevacizumab) for the treatment of people with unresectable or metastatic hepatocellular carcinoma (HCC) who have not received p rior systemic therapy.“We’re excited that today’s approval of Tecentriq in combination with Avastin for unresectable or metastatic hepatocellular carcinoma brings a cancer immunotherapy option to people with this aggressive form of liver cancer,” said Levi Garraway, M.D., Ph....
Source: Roche Media News - Category: Pharmaceuticals Source Type: news
Publication date: Available online 31 May 2020Source: Seminars in Cancer BiologyAuthor(s): Pilipow Karolina, Darwich Abbass, Agnese Losurdo
Source: Seminars in Cancer Biology - Category: Cancer & Oncology Source Type: research
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Source: Nutrition and Cancer - Category: Cancer & Oncology Authors: Source Type: research
SummaryCarcinoembryonic antigen-related cell adhesion molecules (CEACAMs) contain 12 family members(CEACAM1 、CEACAM3、CEACAM4、CEACAM5、CEACAM6、CEACAM7、CEACAM8、CEACAM16、CEACAM18、CEACAM19、CEACAM20 and CEACAM21)and are expressed diversely in different normal and tumor tissues. CEA (CEACAM5) has been used as a tumor biomarker since 1965. Here we review the latest research and development of the structures, expression, and function of CEACAMs in normal and tumor tissues, and their application in the tumor diagnosis, prognosis, and treatment. We focus on recent clinical studies of CEA targeted cancer immunother...
Source: Investigational New Drugs - Category: Drugs & Pharmacology Source Type: research
Paraneoplastic cerebellar degeneration (PCD) is a rare immune-mediated disease that develops mostly in the setting of neoplasia and offers a unique prospect to explore the interplay between tumor immunity and autoimmunity. In PCD, the deleterious adaptive immune response targets self-antigens aberrantly expressed by tumor cells, mostly gynecological cancers, and physiologically expressed by the Purkinje neurons of the cerebellum. Highly specific anti-neuronal antibodies in the serum and cerebrospinal fluid represent key diagnostic biomarkers of PCD. Some anti-neuronal antibodies such as anti-Yo autoantibodies (recognizing ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
ConclusionsIn this review, we address the current knowledge on the presence and immunometabolic roles of NK cells in solid tumors as well as the strategies developed to restore NK cell activities in these conditions, with the ultimate goal of enhancing persistence, trafficking, cytotoxicity and metabolic functions.
Source: Cellular Oncology - Category: Cancer & Oncology Source Type: research
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