Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151
Glioblastoma (GBM) stem cells (GSCs) represent tumor-propagating cells with stem-like characteristics (stemness) that contribute disproportionately to GBM drug resistance and tumor recurrence. Understanding the mechanisms supporting GSC stemness is important for developing therapeutic strategies for...
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Series: | Neoplasia: An International Journal for Oncology Research |
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doaj-525bc3e42f3f4d1291e77350ca2f0c362020-11-25T00:37:06ZengElsevierNeoplasia: An International Journal for Oncology Research1476-55861522-80022016-03-0118318519810.1016/j.neo.2016.02.003Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151Jessica Tilghman0Paula Schiapparelli1Bachuchu Lal2Mingyao Ying3Alfredo Quinones-Hinojosa4Shuli Xia5John Laterra6Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USADepartment of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USAHugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USAHugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USADepartment of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USAHugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USAHugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USAGlioblastoma (GBM) stem cells (GSCs) represent tumor-propagating cells with stem-like characteristics (stemness) that contribute disproportionately to GBM drug resistance and tumor recurrence. Understanding the mechanisms supporting GSC stemness is important for developing therapeutic strategies for targeting GSC-dependent oncogenic mechanisms. Using GBM-derived neurospheres, we identified the cell surface tetraspanin family member CD151 as a novel regulator of glioma cell stemness, GSC self-renewal capacity, migration, and tumor growth. CD151 was found to be overexpressed in GBM tumors and GBM neurospheres enriched in GSCs. Silencing CD151 inhibited neurosphere forming capacity, neurosphere cell proliferation, and migration and attenuated the expression of markers and transcriptional drivers of the GSC phenotype. Conversely, forced CD151 expression promoted neurosphere self-renewal, cell migration, and expression of stemness-associated transcription factors. CD151 was found to complex with integrins α3, α6, and β1 in neurosphere cells, and blocking CD151 interactions with integrins α3 and α6 inhibited AKT phosphorylation, a downstream effector of integrin signaling, and impaired sphere formation and neurosphere cell migration. Additionally, targeting CD151 in vivo inhibited the growth of GBM neurosphere-derived xenografts. These findings identify CD151 and its interactions with integrins α3 and α6 as potential therapeutic targets for inhibiting stemness-driving mechanisms and stem cell populations in GBM.http://www.sciencedirect.com/science/article/pii/S1476558616000233 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jessica Tilghman Paula Schiapparelli Bachuchu Lal Mingyao Ying Alfredo Quinones-Hinojosa Shuli Xia John Laterra |
spellingShingle |
Jessica Tilghman Paula Schiapparelli Bachuchu Lal Mingyao Ying Alfredo Quinones-Hinojosa Shuli Xia John Laterra Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 Neoplasia: An International Journal for Oncology Research |
author_facet |
Jessica Tilghman Paula Schiapparelli Bachuchu Lal Mingyao Ying Alfredo Quinones-Hinojosa Shuli Xia John Laterra |
author_sort |
Jessica Tilghman |
title |
Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 |
title_short |
Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 |
title_full |
Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 |
title_fullStr |
Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 |
title_full_unstemmed |
Regulation of Glioblastoma Tumor-Propagating Cells by the Integrin Partner Tetraspanin CD151 |
title_sort |
regulation of glioblastoma tumor-propagating cells by the integrin partner tetraspanin cd151 |
publisher |
Elsevier |
series |
Neoplasia: An International Journal for Oncology Research |
issn |
1476-5586 1522-8002 |
publishDate |
2016-03-01 |
description |
Glioblastoma (GBM) stem cells (GSCs) represent tumor-propagating cells with stem-like characteristics (stemness) that contribute disproportionately to GBM drug resistance and tumor recurrence. Understanding the mechanisms supporting GSC stemness is important for developing therapeutic strategies for targeting GSC-dependent oncogenic mechanisms. Using GBM-derived neurospheres, we identified the cell surface tetraspanin family member CD151 as a novel regulator of glioma cell stemness, GSC self-renewal capacity, migration, and tumor growth. CD151 was found to be overexpressed in GBM tumors and GBM neurospheres enriched in GSCs. Silencing CD151 inhibited neurosphere forming capacity, neurosphere cell proliferation, and migration and attenuated the expression of markers and transcriptional drivers of the GSC phenotype. Conversely, forced CD151 expression promoted neurosphere self-renewal, cell migration, and expression of stemness-associated transcription factors. CD151 was found to complex with integrins α3, α6, and β1 in neurosphere cells, and blocking CD151 interactions with integrins α3 and α6 inhibited AKT phosphorylation, a downstream effector of integrin signaling, and impaired sphere formation and neurosphere cell migration. Additionally, targeting CD151 in vivo inhibited the growth of GBM neurosphere-derived xenografts. These findings identify CD151 and its interactions with integrins α3 and α6 as potential therapeutic targets for inhibiting stemness-driving mechanisms and stem cell populations in GBM. |
url |
http://www.sciencedirect.com/science/article/pii/S1476558616000233 |
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