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Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer

BACKGROUND & AIMS: Pancreatic cancer has the highest prevalence of cancer-associated cachexia among all cancers. ZIP4 promotes pancreatic cancer progression by regulating oncogenic miR-373, and perturbation of circular RNAs (circRNAs) is associated with cancer aggressiveness. This study aimed to...

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Autores principales: Shi, Xiuhui, Yang, Jingxuan, Liu, Mingyang, Zhang, Yuqing, Zhou, Zhijun, Luo, Wenyi, Fung, Kar-Ming, Xu, Chao, Bronze, Michael S., Houchen, Courtney W., Li, Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10428768/
https://www.ncbi.nlm.nih.gov/pubmed/35176309
http://dx.doi.org/10.1053/j.gastro.2022.02.017
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author Shi, Xiuhui
Yang, Jingxuan
Liu, Mingyang
Zhang, Yuqing
Zhou, Zhijun
Luo, Wenyi
Fung, Kar-Ming
Xu, Chao
Bronze, Michael S.
Houchen, Courtney W.
Li, Min
author_facet Shi, Xiuhui
Yang, Jingxuan
Liu, Mingyang
Zhang, Yuqing
Zhou, Zhijun
Luo, Wenyi
Fung, Kar-Ming
Xu, Chao
Bronze, Michael S.
Houchen, Courtney W.
Li, Min
author_sort Shi, Xiuhui
collection PubMed
description BACKGROUND & AIMS: Pancreatic cancer has the highest prevalence of cancer-associated cachexia among all cancers. ZIP4 promotes pancreatic cancer progression by regulating oncogenic miR-373, and perturbation of circular RNAs (circRNAs) is associated with cancer aggressiveness. This study aimed to identify circRNAs involved in ZIP4/miR-373–driven cancer growth and cachexia and decipher the underlying mechanism. METHODS: Differentially expressed circRNAs and potential targets of microRNA were identified through in silico analysis. The RNA interactions were determined by means of biotinylated microRNA pulldown, RNA immunoprecipitation, and luciferase reporter assays. The function of circRNA in ZIP4–miR-373 signaling axis were examined in human pancreatic cancer cells, 3-dimensional spheroids and organoids, mouse models, and clinical specimens. Mouse skeletal muscles were analyzed by means of histology. RESULTS: We identified circANAPC7 as a sponge for miR-373, which inhibited tumor growth and muscle wasting in vitro and in vivo. Mechanistic studies showed that PHLPP2 is a downstream target of ZIP4/miR-373. CircANAPC7 functions through PHLPP2-mediated dephosphorylation of AKT, thus suppressing cancer cell proliferation by down-regulating cyclin D1 and inhibiting muscle wasting via decreasing the secretion of transforming growth factor–β through STAT5. We further demonstrated that PHLPP2 induced dephosphorylation of CREB, a zinc-dependent transcription factor activated by ZIP4, thereby forming a CREB–miR-373–PHLPP2 feed-forward loop to regulate tumor progression and cancer cachexia. CONCLUSION: This study identified circANAPC7 as a novel tumor suppressor, which functions through the CREB–miR-373–PHLPP2 axis, leading to AKT dephosphorylation, and cyclin D1 and transforming growth factor–β down-regulation to suppress tumor growth and muscle wasting in pancreatic cancer.
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spelling pubmed-104287682023-08-16 Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer Shi, Xiuhui Yang, Jingxuan Liu, Mingyang Zhang, Yuqing Zhou, Zhijun Luo, Wenyi Fung, Kar-Ming Xu, Chao Bronze, Michael S. Houchen, Courtney W. Li, Min Gastroenterology Article BACKGROUND & AIMS: Pancreatic cancer has the highest prevalence of cancer-associated cachexia among all cancers. ZIP4 promotes pancreatic cancer progression by regulating oncogenic miR-373, and perturbation of circular RNAs (circRNAs) is associated with cancer aggressiveness. This study aimed to identify circRNAs involved in ZIP4/miR-373–driven cancer growth and cachexia and decipher the underlying mechanism. METHODS: Differentially expressed circRNAs and potential targets of microRNA were identified through in silico analysis. The RNA interactions were determined by means of biotinylated microRNA pulldown, RNA immunoprecipitation, and luciferase reporter assays. The function of circRNA in ZIP4–miR-373 signaling axis were examined in human pancreatic cancer cells, 3-dimensional spheroids and organoids, mouse models, and clinical specimens. Mouse skeletal muscles were analyzed by means of histology. RESULTS: We identified circANAPC7 as a sponge for miR-373, which inhibited tumor growth and muscle wasting in vitro and in vivo. Mechanistic studies showed that PHLPP2 is a downstream target of ZIP4/miR-373. CircANAPC7 functions through PHLPP2-mediated dephosphorylation of AKT, thus suppressing cancer cell proliferation by down-regulating cyclin D1 and inhibiting muscle wasting via decreasing the secretion of transforming growth factor–β through STAT5. We further demonstrated that PHLPP2 induced dephosphorylation of CREB, a zinc-dependent transcription factor activated by ZIP4, thereby forming a CREB–miR-373–PHLPP2 feed-forward loop to regulate tumor progression and cancer cachexia. CONCLUSION: This study identified circANAPC7 as a novel tumor suppressor, which functions through the CREB–miR-373–PHLPP2 axis, leading to AKT dephosphorylation, and cyclin D1 and transforming growth factor–β down-regulation to suppress tumor growth and muscle wasting in pancreatic cancer. 2022-06 2022-02-14 /pmc/articles/PMC10428768/ /pubmed/35176309 http://dx.doi.org/10.1053/j.gastro.2022.02.017 Text en https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) ).
spellingShingle Article
Shi, Xiuhui
Yang, Jingxuan
Liu, Mingyang
Zhang, Yuqing
Zhou, Zhijun
Luo, Wenyi
Fung, Kar-Ming
Xu, Chao
Bronze, Michael S.
Houchen, Courtney W.
Li, Min
Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title_full Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title_fullStr Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title_full_unstemmed Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title_short Circular RNA ANAPC7 Inhibits Tumor Growth and Muscle Wasting via PHLPP2–AKT–TGF-β Signaling Axis in Pancreatic Cancer
title_sort circular rna anapc7 inhibits tumor growth and muscle wasting via phlpp2–akt–tgf-β signaling axis in pancreatic cancer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10428768/
https://www.ncbi.nlm.nih.gov/pubmed/35176309
http://dx.doi.org/10.1053/j.gastro.2022.02.017
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