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UBXN2A suppresses the Rictor-mTORC2 signaling pathway, an established tumorigenic pathway in human colorectal cancer

The mTORC2 pathway plays a critical role in promoting tumor progression in human colorectal cancer (CRC). The regulatory mechanisms for this signaling pathway are only partially understood. We previously identified UBXN2A as a novel tumor suppressor protein in CRCs and hypothesized that UBXN2A suppr...

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Published in:Oncogene 2023-05, Vol.42 (21), p.1763-1776
Main Authors: Sane, Sanam, Srinivasan, Rekha, Potts, Rashaun A, Eikanger, Morgan, Zagirova, Diana, Freeling, Jessica, Reihe, Casey A, Antony, Ryan M, Gupta, Brij K, Lynch, Douglas, Bleeker, Jonathan, Turaihi, Hassan, Pillatzki, Angela, Zhou, Wei, Luo, Xu, Linnebacher, Michael, Agany, Diing, Zohim, Etienne Gnimpieba, Humphrey, Lisa E, Black, Adrian R, Rezvani, Khosrow
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cited_by cdi_FETCH-LOGICAL-c431t-85eca7a2a2d1750a4cb99a1ed261f4832b6de9e013ffe8eae75978dfff8a53253
cites cdi_FETCH-LOGICAL-c431t-85eca7a2a2d1750a4cb99a1ed261f4832b6de9e013ffe8eae75978dfff8a53253
container_end_page 1776
container_issue 21
container_start_page 1763
container_title Oncogene
container_volume 42
creator Sane, Sanam
Srinivasan, Rekha
Potts, Rashaun A
Eikanger, Morgan
Zagirova, Diana
Freeling, Jessica
Reihe, Casey A
Antony, Ryan M
Gupta, Brij K
Lynch, Douglas
Bleeker, Jonathan
Turaihi, Hassan
Pillatzki, Angela
Zhou, Wei
Luo, Xu
Linnebacher, Michael
Agany, Diing
Zohim, Etienne Gnimpieba
Humphrey, Lisa E
Black, Adrian R
Rezvani, Khosrow
description The mTORC2 pathway plays a critical role in promoting tumor progression in human colorectal cancer (CRC). The regulatory mechanisms for this signaling pathway are only partially understood. We previously identified UBXN2A as a novel tumor suppressor protein in CRCs and hypothesized that UBXN2A suppresses the mTORC2 pathway, thereby inhibiting CRC growth and metastasis. We first used murine models to show that haploinsufficiency of UBXN2A significantly increases colon tumorigenesis. Induction of UBXN2A reduces AKT phosphorylation downstream of the mTORC2 pathway, which is essential for a plethora of cellular processes, including cell migration. Meanwhile, mTORC1 activities remain unchanged in the presence of UBXN2A. Mechanistic studies revealed that UBXN2A targets Rictor protein, a key component of the mTORC2 complex, for 26S proteasomal degradation. A set of genetic, pharmacological, and rescue experiments showed that UBXN2A regulates cell proliferation, apoptosis, migration, and colon cancer stem cells (CSCs) in CRC. CRC patients with a high level of UBXN2A have significantly better survival, and high-grade CRC tissues exhibit decreased UBXN2A protein expression. A high level of UBXN2A in patient-derived xenografts and tumor organoids decreases Rictor protein and suppresses the mTORC2 pathway. These findings provide new insights into the functions of an ubiquitin-like protein by inhibiting a dominant oncogenic pathway in CRC.
doi_str_mv 10.1038/s41388-023-02686-7
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A set of genetic, pharmacological, and rescue experiments showed that UBXN2A regulates cell proliferation, apoptosis, migration, and colon cancer stem cells (CSCs) in CRC. CRC patients with a high level of UBXN2A have significantly better survival, and high-grade CRC tissues exhibit decreased UBXN2A protein expression. A high level of UBXN2A in patient-derived xenografts and tumor organoids decreases Rictor protein and suppresses the mTORC2 pathway. These findings provide new insights into the functions of an ubiquitin-like protein by inhibiting a dominant oncogenic pathway in CRC.</abstract><cop>England</cop><pub>Nature Publishing Group</pub><pmid>37037900</pmid><doi>10.1038/s41388-023-02686-7</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0003-1560-6921</orcidid><orcidid>https://orcid.org/0000-0001-8054-1402</orcidid><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0950-9232
ispartof Oncogene, 2023-05, Vol.42 (21), p.1763-1776
issn 0950-9232
1476-5594
language eng
recordid cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_10287065
source Nexis UK; Springer Link
subjects AKT protein
Animal models
Animals
Apoptosis
Carcinogenesis - genetics
Cell Line, Tumor
Cell migration
Cell proliferation
Colon cancer
Colonic Neoplasms - pathology
Colorectal cancer
Colorectal carcinoma
Haploinsufficiency
Humans
Mechanistic Target of Rapamycin Complex 2 - metabolism
Metastases
Mice
Neoplastic Stem Cells - pathology
Organoids
Phosphorylation
Proteasomes
Proteins
Proto-Oncogene Proteins c-akt - metabolism
Rapamycin-Insensitive Companion of mTOR Protein - genetics
Rapamycin-Insensitive Companion of mTOR Protein - metabolism
Signal Transduction
Transcription Factors - genetics
Tumor suppressor genes
Tumorigenesis
Ubiquitin
Ubiquitins - metabolism
title UBXN2A suppresses the Rictor-mTORC2 signaling pathway, an established tumorigenic pathway in human colorectal cancer
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-09-22T03%3A20%3A50IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_pubme&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=UBXN2A%20suppresses%20the%20Rictor-mTORC2%20signaling%20pathway,%20an%20established%20tumorigenic%20pathway%20in%20human%20colorectal%20cancer&rft.jtitle=Oncogene&rft.au=Sane,%20Sanam&rft.date=2023-05-22&rft.volume=42&rft.issue=21&rft.spage=1763&rft.epage=1776&rft.pages=1763-1776&rft.issn=0950-9232&rft.eissn=1476-5594&rft_id=info:doi/10.1038/s41388-023-02686-7&rft_dat=%3Cproquest_pubme%3E2799825787%3C/proquest_pubme%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c431t-85eca7a2a2d1750a4cb99a1ed261f4832b6de9e013ffe8eae75978dfff8a53253%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2817270691&rft_id=info:pmid/37037900&rfr_iscdi=true