Upregulation of SPP1 Is a Marker for Poor Lung Cancer Prognosis and Contributes to Cancer Progression and Cisplatin Resistance
The chemoresistance of lung cancer is a significant contributor to its high mortality and morbidity rate. There is an urgent need to identify differentially expressed genes in lung cancer patients with a poor prognosis to develop effective means to overcome drug resistance in subsequent treatment. I...
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Published in | Frontiers in cell and developmental biology Vol. 9; p. 646390 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
29.04.2021
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Subjects | |
Online Access | Get full text |
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Summary: | The chemoresistance of lung cancer is a significant contributor to its high mortality and morbidity rate. There is an urgent need to identify differentially expressed genes in lung cancer patients with a poor prognosis to develop effective means to overcome drug resistance in subsequent treatment. In this study, we identified the secreted phosphoprotein 1 (
) as a potential gene associated with a poor diagnosis of lung cancer patients using the Cancer Genome Atlas analysis, which suggested that the expression of
in tumor tissues was significantly higher than normal tissues. The high expression of
was also correlated with tumor grade and poor clinical prognosis. To understand the roles of
and the DNA methyltransferase 1 (
), which regulated
expression, in affecting cell viability, migration and invasion,
and
were overexpressed in the human lung cancer A549 and NCI-446 cells, followed by analyzing cell viability, migration and invasion. We showed that
promoted the proliferation, migration and invasion of lung cancer cells, and increased the resistance of lung cancer to the chemotherapeutic drug cisplatin. Knocking down
in cells restored sensitivity to cisplatin. Further, A549 cells without
overexpression demonstrated lower tumor growth rate than
overexpression cells using the xenograft tumor mouse model. High expression of
in lung cancer tumor tissue was caused by the reduced methylation level of its promoter region mediated by
. Our data suggested that
can be used as a marker for highly malignant lung cancer and targeting
may be a potential lung cancer treatment strategy. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 This article was submitted to Cell Adhesion and Migration, a section of the journal Frontiers in Cell and Developmental Biology Edited by: Mitsugu Fujita, Kindai University, Japan Reviewed by: Orest William Blaschuk, McGill University, Canada; Isao Suetake, Nakamura Gakuen University, Japan |
ISSN: | 2296-634X 2296-634X |
DOI: | 10.3389/fcell.2021.646390 |