Activating CCT2 triggers Gli-1 activation during hypoxic condition in colorectal cancer

Hypoxia, or the deficiency of oxygen, in solid tumors is majorly responsible for the progression of cancer and remains unaffected by chemotherapy, but still requires definitive definition of the hypoxia signaling. Hypoxia disrupts the complete folding of mitochondrial proteins, leading to several di...

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Veröffentlicht in:Oncogene 2020-01, Vol.39 (1), p.136-150
Hauptverfasser: Park, Seong Hye, Jeong, Soyeon, Kim, Bo Ram, Jeong, Yoon A, Kim, Jung Lim, Na, Yoo Jin, Jo, Min Jee, Yun, Hye Kyeong, Kim, Dae Yeong, Kim, Bu Gyeom, Lee, Dae-Hee, Oh, Sang Cheul
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container_end_page 150
container_issue 1
container_start_page 136
container_title Oncogene
container_volume 39
creator Park, Seong Hye
Jeong, Soyeon
Kim, Bo Ram
Jeong, Yoon A
Kim, Jung Lim
Na, Yoo Jin
Jo, Min Jee
Yun, Hye Kyeong
Kim, Dae Yeong
Kim, Bu Gyeom
Lee, Dae-Hee
Oh, Sang Cheul
description Hypoxia, or the deficiency of oxygen, in solid tumors is majorly responsible for the progression of cancer and remains unaffected by chemotherapy, but still requires definitive definition of the hypoxia signaling. Hypoxia disrupts the complete folding of mitochondrial proteins, leading to several diseases. The present study confirms that hypoxia activates the Hedgehog pathway in colorectal cancer (CRC), considering its role in cancer epithelial to mesenchymal transition, migration, and invasion. The activity of hypoxia-mediated Gli-1, a Hedgehog signaling factor in hypoxia, was confirmed by in vitro western blotting, immunofluorescence staining, wound-healing assay, and matrigel invasion assay, as well as by in vivo xenograft models ( n  = 5 per group). The Gli-1 mechanism in hypoxia was analyzed via mass spectrometry. Hypoxia enhanced the interaction of Gli-1 and T-complex protein 1 subunit beta (CCT2), as observed in the mass spectrometric analysis. We observed that reduction in CCT2 inhibits tumor induction by Gli-1. Ubiquitination-mediated Gli-1 degradation by β-TrCP occurs during incomplete folding of Gli-1 in hypoxia. The human CRC tissues revealed greater CCT2 expression than did the normal colon tissues, indicating that higher CCT2 expression in tumor tissues from CRC patients reduced their survival rate. Moreover, we suggest that CCT2 correlates with Gli-1 expression and is an important determinant of survival in the CRC patients. The results reveal that CCT2 can regulate the folding of Gli-1 in relation to hypoxia in CRC.
doi_str_mv 10.1038/s41388-019-0972-6
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The human CRC tissues revealed greater CCT2 expression than did the normal colon tissues, indicating that higher CCT2 expression in tumor tissues from CRC patients reduced their survival rate. Moreover, we suggest that CCT2 correlates with Gli-1 expression and is an important determinant of survival in the CRC patients. 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The human CRC tissues revealed greater CCT2 expression than did the normal colon tissues, indicating that higher CCT2 expression in tumor tissues from CRC patients reduced their survival rate. Moreover, we suggest that CCT2 correlates with Gli-1 expression and is an important determinant of survival in the CRC patients. The results reveal that CCT2 can regulate the folding of Gli-1 in relation to hypoxia in CRC.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>31462707</pmid><doi>10.1038/s41388-019-0972-6</doi><tpages>15</tpages></addata></record>
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subjects 631/67/322
631/67/395
631/80/82/23
82/1
82/29
82/51
82/58
96/31
Analysis
Animals
Apoptosis
beta-Transducin Repeat-Containing Proteins - pharmacology
Cancer
Care and treatment
Cell Biology
Cell Movement - drug effects
Cell Proliferation - drug effects
Chaperonin Containing TCP-1 - chemistry
Chaperonin Containing TCP-1 - genetics
Chemotherapy
Colorectal cancer
Colorectal carcinoma
Colorectal Neoplasms - genetics
Colorectal Neoplasms - pathology
Development and progression
Female
Gene Expression Regulation, Neoplastic - drug effects
HCT116 Cells
Hedgehog protein
Hedgehog Proteins - genetics
Heterografts
Human Genetics
Humans
Hypoxia
Immunofluorescence
Internal Medicine
Male
Mass spectrometry
Mass spectroscopy
Medicine
Medicine & Public Health
Mesenchyme
Mice
Mitochondria
Neoplasm Invasiveness - genetics
Neoplasm Invasiveness - pathology
Oncology
Protein Folding
Proteins
Proteolysis - drug effects
Signal Transduction - genetics
Solid tumors
Survival
Survival Rate
Tumor Hypoxia - genetics
Ubiquitination
Ubiquitination - genetics
Western blotting
Wound healing
Xenografts
Zinc Finger Protein GLI1 - chemistry
Zinc Finger Protein GLI1 - genetics
title Activating CCT2 triggers Gli-1 activation during hypoxic condition in colorectal cancer
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