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You K, Du X, Zhao Y, Wen F, Lu Z, Fan H. RRP8, associated with immune infiltration, is a prospective therapeutic target in hepatocellular carcinoma. J Cancer Res Clin Oncol 2024; 150:245. [PMID: 38722372 PMCID: PMC11082032 DOI: 10.1007/s00432-024-05756-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 04/22/2024] [Indexed: 05/12/2024]
Abstract
BACKGROUND Ribosomal RNA Processing 8 (RRP8) is a nucleolar Rossman fold-like methyltransferase that exhibits increased expression in many malignant tumours. However, the role of RRP8 in hepatocellular carcinoma (HCC) is still uncertain. We explored the relationships between RRP8 and prognosis and immune infiltration, as well as the putative pathological function and mechanism of RRP8 in HCC. METHODS Analysis of RRP8 expression across cancers was performed by using multiple databases. Associations between RRP8 expression and clinicopathological factors were further examined. Gene enrichment analysis was used to identify various putative biological activities and regulatory networks of RRP8 in HCC. The relationship between RRP8 expression and immune infiltration was confirmed by single-sample gene set enrichment analysis (ssGSEA). Univariate and multivariate Cox regression analyses were conducted to assess the impact of clinical variables on patient outcomes. Furthermore, a nomogram was constructed to estimate survival probability based on multivariate Cox regression analysis. Functional validation of RRP8 in HCC was performed with two different systems: doxycycline-inducible shRNA knockdown and CRISPR-Cas9 knockout. RESULTS RRP8 was markedly overexpressed in HCC clinical specimens compared to adjacent normal tissues. Further analysis demonstrated that RRP8 was directly connected to multiple clinical characteristics and strongly associated with various immune markers in HCC. Moreover, elevated RRP8 expression indicated an unfavourable prognosis. Our functional studies revealed that both knockdown and knockout of RRP8 dramatically attenuated liver cancer cells to proliferate and migrate. Knockout of RRP8 decreased the phosphorylation of MEK1/2 and β-catenin-(Y654) signalling pathway components; downregulated downstream signalling effectors, including Cyclin D1 and N-cadherin; and upregulated E-cadherin. CONCLUSIONS RRP8 is strongly implicated in immune infiltration and could be a potential therapeutic target in HCC.
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Affiliation(s)
- Kai You
- NHC Key Laboratory of Cell Transplantation, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Xingxing Du
- NHC Key Laboratory of Cell Transplantation, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Yunzheng Zhao
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Fukai Wen
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Zhaoyang Lu
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Huitao Fan
- NHC Key Laboratory of Cell Transplantation, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
- Key Laboratory of Hepatosplenic Surgery of Ministry of Education, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
- Department of Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
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Fisher AL, Babitt JL. Coordination of iron homeostasis by bone morphogenetic proteins: Current understanding and unanswered questions. Dev Dyn 2022; 251:26-46. [PMID: 33993583 PMCID: PMC8594283 DOI: 10.1002/dvdy.372] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/15/2021] [Accepted: 05/07/2021] [Indexed: 01/19/2023] Open
Abstract
Iron homeostasis is tightly regulated to balance the iron requirement for erythropoiesis and other vital cellular functions, while preventing cellular injury from iron excess. The liver hormone hepcidin is the master regulator of systemic iron balance by controlling the degradation and function of the sole known mammalian iron exporter ferroportin. Liver hepcidin expression is coordinately regulated by several signals that indicate the need for more or less iron, including plasma and tissue iron levels, inflammation, and erythropoietic drive. Most of these signals regulate hepcidin expression by modulating the activity of the bone morphogenetic protein (BMP)-SMAD pathway, which controls hepcidin transcription. Genetic disorders of iron overload and iron deficiency have identified several hepatocyte membrane proteins that play a critical role in mediating the BMP-SMAD and hepcidin regulatory response to iron. However, the precise molecular mechanisms by which serum and tissue iron levels are sensed to regulate BMP ligand production and promote the physical and/or functional interaction of these proteins to modulate SMAD signaling and hepcidin expression remain uncertain. This critical commentary will focus on the current understanding and key unanswered questions regarding how the liver senses iron levels to regulate BMP-SMAD signaling and thereby hepcidin expression to control systemic iron homeostasis.
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Affiliation(s)
| | - Jodie L Babitt
- Corresponding author: Jodie L Babitt, Division of Nephrology, Program in Membrane Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA. Mailing address: 185 Cambridge St., CPZN-8208, Boston, MA 02114. Telephone: +1 (617) 643-3181.
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Zhu YY, Zhao YC, Chen C, Xie M. CCL5 secreted by luminal B breast cancer cells induces polarization of M2 macrophages through activation of MEK/STAT3 signaling pathway via CCR5. Gene 2021; 812:146100. [PMID: 34864094 DOI: 10.1016/j.gene.2021.146100] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 10/31/2021] [Accepted: 11/16/2021] [Indexed: 12/19/2022]
Abstract
In humans, breast cancer affects a large number of females and causes a high rate of mortality worldwide. Chemokine (C-C motif) ligand 5 (CCL5) is one of the cytokines that is highly correlated to the invasive and metastatic stages of breast cancer. Our previous study has suggested the prognostic value of CCL5 expression in luminal B (HER2 - ) breast cancer. In this study, CCL5 expression was upregulated or knockdown in a luminal B breast cancer cell line, ZR7530. Further, we elucidated the effects of CCL5 on the differentiation of THP-1 monocytes into M2 macrophages. Overexpression of CCL5 affected THP-1-M2 differentiation and phosphorylation of MEK1/2, ERK1/2, and STAT2 in the cocultivated cell lines. We report that the knockdown of CCR5, a receptor of CCL5 in THP-1, inhibited the effect of ZR7530 in promoting THP-1-M2 differentiation. Furthermore, our data revealed that the inhibition of MEK1/2 and STAT3 in THP-1 cells produced equivalent results similar to those of CCL5 knockdown. In summary, we revealed the role of CCL5 in the polarization of M2 macrophages. Furthermore, we studied its interaction with CCR5 and MEK/STAT3 signaling members. These targets could be used as key regulatory members in human breast cancer therapy.
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Affiliation(s)
- Yong-Yun Zhu
- Department of Thyroid and Breast Surgery, Wuhu Second People's Hospital, China.
| | - Ying-Chun Zhao
- Department of Thyroid and Breast Surgery, Wuhu Traditional Chinese Medicine Hospital, China
| | - Chuang Chen
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, China
| | - Min Xie
- Department of pathology, Wuhu Second People's Hospital, China
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Pujol-Carrion N, Pavón-Vergés M, Arroyo J, de la Torre-Ruiz MA. The MAPK Slt2/Mpk1 plays a role in iron homeostasis through direct regulation of the transcription factor Aft1. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:118974. [PMID: 33549702 DOI: 10.1016/j.bbamcr.2021.118974] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 01/14/2021] [Accepted: 01/28/2021] [Indexed: 01/18/2023]
Abstract
Iron is an essential element for life. Cells develop mechanisms to tightly regulate its homeostasis, in order to avoid abnormal accumulation and the consequent cell toxicity. In budding yeast, the high affinity iron regulon is under the control of the transcription factor Aft1. We present evidence demonstrating that the MAPK Slt2 of the cell wall integrity pathway (CWI), phosphorylates and negatively regulates Aft1 activity upon the iron depletion signal, both in fermentative or respiratory conditions. The lack of Slt2 provokes Aft1 dysfunction leading to a shorter chronological life span. The signal of iron scarcity is not transmitted to Slt2 through other signalling pathways such as TOR1, PKA, SNF1 or TOR2/YPK1. The observation that Slt2 physically binds Aft1 rather suggests a direct regulation.
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Affiliation(s)
- Nuria Pujol-Carrion
- Cell Signalling in Yeast Unit, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLleida), University of Lleida, 25198 Lleida, Spain
| | - Mónica Pavón-Vergés
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University Complutense de Madrid, IRYCIS, 28040 Madrid, Spain
| | - Javier Arroyo
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University Complutense de Madrid, IRYCIS, 28040 Madrid, Spain
| | - Maria Angeles de la Torre-Ruiz
- Cell Signalling in Yeast Unit, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLleida), University of Lleida, 25198 Lleida, Spain.
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Kenawi M, Rouger E, Island ML, Leroyer P, Robin F, Rémy S, Tesson L, Anegon I, Nay K, Derbré F, Brissot P, Ropert M, Cavey T, Loréal O. Ceruloplasmin deficiency does not induce macrophagic iron overload: lessons from a new rat model of hereditary aceruloplasminemia. FASEB J 2019; 33:13492-13502. [DOI: 10.1096/fj.201901106r] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Moussa Kenawi
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Emmanuel Rouger
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Marie-Laure Island
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Patricia Leroyer
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - François Robin
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Séverine Rémy
- INSERM UMR 1064- Centre de Recherches en Transplantation et Immunologie (CRTI), Transgenic Rats ImmunoPhenomic facility, Nantes, France
| | - Laurent Tesson
- INSERM UMR 1064- Centre de Recherches en Transplantation et Immunologie (CRTI), Transgenic Rats ImmunoPhenomic facility, Nantes, France
| | - Ignacio Anegon
- INSERM UMR 1064- Centre de Recherches en Transplantation et Immunologie (CRTI), Transgenic Rats ImmunoPhenomic facility, Nantes, France
| | - Kévin Nay
- Laboratory Movement, Sport, and Health Sciences (M2S-EA7470), University Rennes 2–Ecole Normale Supérieure (ENS) Rennes, Bruz, France
| | - Frédéric Derbré
- Laboratory Movement, Sport, and Health Sciences (M2S-EA7470), University Rennes 2–Ecole Normale Supérieure (ENS) Rennes, Bruz, France
| | - Pierre Brissot
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Martine Ropert
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Thibault Cavey
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
| | - Olivier Loréal
- INSERM, Univ Rennes, INRA, Platform Analyse Elémentaire et Métabolisme des Métaux, UMR 1241 Institut NuMeCan (Nutrition, Metabolism, and Cancer), Centre Hospitalier Universitaire (CHU) Pontchaillou, Rennes, France
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