89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells

Abstract CD44 is a cell-surface glycoprotein involved in cell–cell interaction, adhesion, and migration. CD44 is found on colon cancer cells and on immune cells. Previous studies of 89Zr PET imaging of CD44 have relied on an anti-human antibody (Ab), which can influence biodistribution in murine mod...

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Autores principales:	Jin Won Park, Kyung-Ho Jung, Jin Hee Lee, Seung Hwan Moon, Young Seok Cho, Kyung-Han Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8da0f26256c24d0688b7a7b0d20c887e
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spelling	oai:doaj.org-article:8da0f26256c24d0688b7a7b0d20c887e2021-12-02T14:03:46Z89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells10.1038/s41598-021-83496-32045-2322https://doaj.org/article/8da0f26256c24d0688b7a7b0d20c887e2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83496-3https://doaj.org/toc/2045-2322Abstract CD44 is a cell-surface glycoprotein involved in cell–cell interaction, adhesion, and migration. CD44 is found on colon cancer cells and on immune cells. Previous studies of 89Zr PET imaging of CD44 have relied on an anti-human antibody (Ab), which can influence biodistribution in murine models. In this study, we used an Ab that cross-reacts with both human and mouse origin CD44 of all isoforms to unveil the type of leukocyte responsible for high splenic anti-CD44 uptake and investigate how its regulation can influence tumor immuno-PET. The Ab was site-specifically labeled with 89Zr-deferoxamine on cysteine residues. 89Zr-anti-CD44 demonstrated high-specific binding to HT29 human colon cancer cells and monocytic cells that showed CD44 expression. When 89Zr-anti-CD44 was administered to Balb/C nude mice, there was remarkably high splenic uptake but low SNU-C5 tumor uptake (1.2 ± 0.7%ID/g). Among cells isolated from Balb/C mouse spleen, there was greater CD44 expression on CD11b positive myeloid cells than lymphocytes. In cultured monocytic and macrophage cells, LPS stimulation upregulated CD44 expression and increased 89Zr-anti-CD44 binding. Similarly, normal Balb/C mice that underwent lipopolysaccharide (LPS) stimulation showed a significant upregulation of CD44 expression on splenic myeloid cells. Furthermore, LPS treatment stimulated a 2.44-fold increase of 89Zr-anti-CD44 accumulation in the spleen, which was attributable to splenic myeloid cells. Finally, in Balb/C nude mice bearing HT29 tumors, we injected 89Zr-anti-CD44 with greater Ab doses to reduce binding to splenic cells. The results showed lower spleen uptake and improved tumor uptake (2.9 ± 1.3%ID/g) with a total of 300 μg of Ab dose, and further reduction of spleen uptake and greater tumor uptake (5.7 ± 0.0%ID/g) with 700 μg Ab dose. Thus, using an 89Zr labeled Ab that cross-reacts with both human and mouse CD44, we demonstrate that CD44 immuno-PET has the capacity to monitor CD44 regulation on splenic myeloid cells and may also be useful for imaging colon tumors.Jin Won ParkKyung-Ho JungJin Hee LeeSeung Hwan MoonYoung Seok ChoKyung-Han LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jin Won Park Kyung-Ho Jung Jin Hee Lee Seung Hwan Moon Young Seok Cho Kyung-Han Lee 89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
description	Abstract CD44 is a cell-surface glycoprotein involved in cell–cell interaction, adhesion, and migration. CD44 is found on colon cancer cells and on immune cells. Previous studies of 89Zr PET imaging of CD44 have relied on an anti-human antibody (Ab), which can influence biodistribution in murine models. In this study, we used an Ab that cross-reacts with both human and mouse origin CD44 of all isoforms to unveil the type of leukocyte responsible for high splenic anti-CD44 uptake and investigate how its regulation can influence tumor immuno-PET. The Ab was site-specifically labeled with 89Zr-deferoxamine on cysteine residues. 89Zr-anti-CD44 demonstrated high-specific binding to HT29 human colon cancer cells and monocytic cells that showed CD44 expression. When 89Zr-anti-CD44 was administered to Balb/C nude mice, there was remarkably high splenic uptake but low SNU-C5 tumor uptake (1.2 ± 0.7%ID/g). Among cells isolated from Balb/C mouse spleen, there was greater CD44 expression on CD11b positive myeloid cells than lymphocytes. In cultured monocytic and macrophage cells, LPS stimulation upregulated CD44 expression and increased 89Zr-anti-CD44 binding. Similarly, normal Balb/C mice that underwent lipopolysaccharide (LPS) stimulation showed a significant upregulation of CD44 expression on splenic myeloid cells. Furthermore, LPS treatment stimulated a 2.44-fold increase of 89Zr-anti-CD44 accumulation in the spleen, which was attributable to splenic myeloid cells. Finally, in Balb/C nude mice bearing HT29 tumors, we injected 89Zr-anti-CD44 with greater Ab doses to reduce binding to splenic cells. The results showed lower spleen uptake and improved tumor uptake (2.9 ± 1.3%ID/g) with a total of 300 μg of Ab dose, and further reduction of spleen uptake and greater tumor uptake (5.7 ± 0.0%ID/g) with 700 μg Ab dose. Thus, using an 89Zr labeled Ab that cross-reacts with both human and mouse CD44, we demonstrate that CD44 immuno-PET has the capacity to monitor CD44 regulation on splenic myeloid cells and may also be useful for imaging colon tumors.
format	article
author	Jin Won Park Kyung-Ho Jung Jin Hee Lee Seung Hwan Moon Young Seok Cho Kyung-Han Lee
author_facet	Jin Won Park Kyung-Ho Jung Jin Hee Lee Seung Hwan Moon Young Seok Cho Kyung-Han Lee
author_sort	Jin Won Park
title	89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
title_short	89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
title_full	89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
title_fullStr	89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
title_full_unstemmed	89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells
title_sort	89zr anti-cd44 immuno-pet monitors cd44 expression on splenic myeloid cells and ht29 colon cancer cells
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8da0f26256c24d0688b7a7b0d20c887e
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89Zr anti-CD44 immuno-PET monitors CD44 expression on splenic myeloid cells and HT29 colon cancer cells

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