DC-HIL/Gpnmb Is a Negative Regulator of Tumor Response to Immune Checkpoint Inhibitors

Immune checkpoint inhibitors (ICI) benefit only a minority of treated patients with cancer. Identification of biomarkers distinguishing responders and nonresponders will improve management of patients with cancer. Because the DC-HIL checkpoint differs from the PD1 pathway in expression and inhibitor...

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Veröffentlicht in:Clinical cancer research 2020-03, Vol.26 (6), p.1449-1459
Hauptverfasser: Chung, Jin-Sung, Ramani, Vijay, Kobayashi, Masato, Fattah, Farjana, Popat, Vinita, Zhang, Song, Cruz, Jr, Ponciano D, Gerber, David E, Ariizumi, Kiyoshi
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container_end_page 1459
container_issue 6
container_start_page 1449
container_title Clinical cancer research
container_volume 26
creator Chung, Jin-Sung
Ramani, Vijay
Kobayashi, Masato
Fattah, Farjana
Popat, Vinita
Zhang, Song
Cruz, Jr, Ponciano D
Gerber, David E
Ariizumi, Kiyoshi
description Immune checkpoint inhibitors (ICI) benefit only a minority of treated patients with cancer. Identification of biomarkers distinguishing responders and nonresponders will improve management of patients with cancer. Because the DC-HIL checkpoint differs from the PD1 pathway in expression and inhibitory mechanisms, we examined whether DC-HIL expression regulates ICI responsiveness. Plasma samples were collected from patients with advanced non-small cell lung carcinoma (NSCLC) ( = 76) at baseline and/or follow-up after ICI monotherapy. Blood-soluble DC-HIL (sDC-HIL) was determined and analyzed for correlation with the early tumor response. To study the mechanisms, we measured effect of anti-DC-HIL versus anti-PDL1 mAb on growth of mouse tumor cells in experimentally metastatic lung. Influence of DC-HIL to anti-PDL1 treatment was assessed by changes in tumor response after deletion of host- gene, injection of DC-HIL-expressing myeloid-derived suppressor cells (MDSC), or induction of sDC-HIL expression. Nonresponders expressed significantly higher levels of baseline sDC-HIL levels than responders. Among patients ( = 28) for fluctuation with time, nonresponders (14/15 cases) showed increasing or persistently elevated levels. Responders (12/13) had decreasing or persistently low levels. Among various tumors, B16 melanoma exhibited resistance to anti-PDL1 but responded to anti-DC-HIL mAb. Using B16 melanoma and LL2 lung cancer, we showed that deletion of host-derived DC-HIL expression converted the resistant tumor to one responsive to anti-PDL1 mAb. The responsive state was reversed by infusion of DC-HIL MDSC or induction of sDC-HIL expression. sDC-HIL in the blood and probably DC-HIL receptor expressed by MDSC play an important role in regulating response to ICI in advanced NSCLC.
doi_str_mv 10.1158/1078-0432.CCR-19-2360
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Identification of biomarkers distinguishing responders and nonresponders will improve management of patients with cancer. Because the DC-HIL checkpoint differs from the PD1 pathway in expression and inhibitory mechanisms, we examined whether DC-HIL expression regulates ICI responsiveness. Plasma samples were collected from patients with advanced non-small cell lung carcinoma (NSCLC) ( = 76) at baseline and/or follow-up after ICI monotherapy. Blood-soluble DC-HIL (sDC-HIL) was determined and analyzed for correlation with the early tumor response. To study the mechanisms, we measured effect of anti-DC-HIL versus anti-PDL1 mAb on growth of mouse tumor cells in experimentally metastatic lung. Influence of DC-HIL to anti-PDL1 treatment was assessed by changes in tumor response after deletion of host- gene, injection of DC-HIL-expressing myeloid-derived suppressor cells (MDSC), or induction of sDC-HIL expression. Nonresponders expressed significantly higher levels of baseline sDC-HIL levels than responders. Among patients ( = 28) for fluctuation with time, nonresponders (14/15 cases) showed increasing or persistently elevated levels. Responders (12/13) had decreasing or persistently low levels. Among various tumors, B16 melanoma exhibited resistance to anti-PDL1 but responded to anti-DC-HIL mAb. Using B16 melanoma and LL2 lung cancer, we showed that deletion of host-derived DC-HIL expression converted the resistant tumor to one responsive to anti-PDL1 mAb. 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Identification of biomarkers distinguishing responders and nonresponders will improve management of patients with cancer. Because the DC-HIL checkpoint differs from the PD1 pathway in expression and inhibitory mechanisms, we examined whether DC-HIL expression regulates ICI responsiveness. Plasma samples were collected from patients with advanced non-small cell lung carcinoma (NSCLC) ( = 76) at baseline and/or follow-up after ICI monotherapy. Blood-soluble DC-HIL (sDC-HIL) was determined and analyzed for correlation with the early tumor response. To study the mechanisms, we measured effect of anti-DC-HIL versus anti-PDL1 mAb on growth of mouse tumor cells in experimentally metastatic lung. Influence of DC-HIL to anti-PDL1 treatment was assessed by changes in tumor response after deletion of host- gene, injection of DC-HIL-expressing myeloid-derived suppressor cells (MDSC), or induction of sDC-HIL expression. Nonresponders expressed significantly higher levels of baseline sDC-HIL levels than responders. Among patients ( = 28) for fluctuation with time, nonresponders (14/15 cases) showed increasing or persistently elevated levels. Responders (12/13) had decreasing or persistently low levels. Among various tumors, B16 melanoma exhibited resistance to anti-PDL1 but responded to anti-DC-HIL mAb. Using B16 melanoma and LL2 lung cancer, we showed that deletion of host-derived DC-HIL expression converted the resistant tumor to one responsive to anti-PDL1 mAb. The responsive state was reversed by infusion of DC-HIL MDSC or induction of sDC-HIL expression. sDC-HIL in the blood and probably DC-HIL receptor expressed by MDSC play an important role in regulating response to ICI in advanced NSCLC.</abstract><cop>United States</cop><pmid>31822499</pmid><doi>10.1158/1078-0432.CCR-19-2360</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-6630-4440</orcidid><orcidid>https://orcid.org/0000-0003-2837-842X</orcidid><orcidid>https://orcid.org/0000-0002-7812-6741</orcidid><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Aged, 80 and over
Animals
Antibodies, Monoclonal - pharmacology
B7-H1 Antigen - antagonists & inhibitors
B7-H1 Antigen - immunology
B7-H1 Antigen - metabolism
Carcinoma, Non-Small-Cell Lung - immunology
Carcinoma, Non-Small-Cell Lung - metabolism
Carcinoma, Non-Small-Cell Lung - pathology
Carcinoma, Non-Small-Cell Lung - therapy
Cell Line, Tumor
Disease Models, Animal
Female
Humans
Immunologic Factors - metabolism
Immunotherapy - methods
Lung Neoplasms - immunology
Lung Neoplasms - metabolism
Lung Neoplasms - secondary
Lung Neoplasms - therapy
Male
Melanoma, Experimental - immunology
Melanoma, Experimental - metabolism
Melanoma, Experimental - pathology
Melanoma, Experimental - therapy
Membrane Glycoproteins - immunology
Membrane Glycoproteins - metabolism
Mice
Mice, Inbred C57BL
Middle Aged
Myeloid-Derived Suppressor Cells - immunology
Skin Neoplasms - immunology
Skin Neoplasms - metabolism
Skin Neoplasms - pathology
Skin Neoplasms - therapy
title DC-HIL/Gpnmb Is a Negative Regulator of Tumor Response to Immune Checkpoint Inhibitors
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