1
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Liu H, Su P, Li Y, Hoover A, Hu S, King SA, Zhao J, Guan JL, Chen SY, Zhao Y, Tan M, Wu X. VAMP2 controls murine epidermal differentiation and carcinogenesis by regulation of nucleophagy. Dev Cell 2024:S1534-5807(24)00321-6. [PMID: 38810653 DOI: 10.1016/j.devcel.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 02/16/2024] [Accepted: 05/03/2024] [Indexed: 05/31/2024]
Abstract
Differentiation of murine epidermal stem/progenitor cells involves the permanent withdrawal from the cell cycle, the synthesis of various protein and lipid components for the cornified envelope, and the controlled dissolution of cellular organelles and nuclei. Deregulated epidermal differentiation contributes to the development of various skin diseases, including skin cancers. With a genome-wide shRNA screen, we identified vesicle-associated membrane protein 2 (VAMP2) as a critical factor involved in skin differentiation. Deletion of VAMP2 leads to aberrant skin stratification and enucleation in vivo. With quantitative proteomics, we further identified an autophagy protein, focal adhesion kinase family interacting protein of 200 kDa (FIP200), as a binding partner of VAMP2. Additionally, we showed that both VAMP2 and FIP200 are critical for murine keratinocyte enucleation and epidermal differentiation. Loss of VAMP2 or FIP200 enhances cutaneous carcinogenesis in vivo. Together, our findings identify important molecular mechanisms underlying epidermal differentiation and skin tumorigenesis.
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Affiliation(s)
- Han Liu
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Peihong Su
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Yuanyuan Li
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Alex Hoover
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Sophie Hu
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Sarah A King
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Jing Zhao
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Shao-Yu Chen
- Department of Pharmacology and Toxicology, School of Medicine, University of Louisville, Louisville, KY 40202, USA
| | - Yingming Zhao
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA
| | - Minjia Tan
- The Chemical Proteomics Center and State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P.R. China
| | - Xiaoyang Wu
- Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA.
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2
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Huyghe J, Priem D, Bertrand MJM. Cell death checkpoints in the TNF pathway. Trends Immunol 2023:S1471-4906(23)00105-9. [PMID: 37357102 DOI: 10.1016/j.it.2023.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/19/2023] [Accepted: 05/19/2023] [Indexed: 06/27/2023]
Abstract
Tumor necrosis factor (TNF) plays a central role in orchestrating mammalian inflammatory responses. It promotes inflammation either directly by inducing inflammatory gene expression or indirectly by triggering cell death. TNF-mediated cell death-driven inflammation can be beneficial during infection by providing cell-extrinsic signals that help to mount proper immune responses. Uncontrolled cell death caused by TNF is instead highly detrimental and is believed to cause several human autoimmune diseases. Death is not the default response to TNF sensing. Molecular brakes, or cell death checkpoints, actively repress TNF cytotoxicity to protect the organism from its detrimental consequences. These checkpoints therefore constitute essential safeguards against inflammatory diseases. Recent advances in the field have revealed the existence of several new and unexpected brakes against TNF cytotoxicity and pathogenicity.
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Affiliation(s)
- Jon Huyghe
- Cell Death and Inflammation Unit, Vlaams Instituut voor Biotechnologie (VIB) Center for Inflammation Research, 9052 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Dario Priem
- Cell Death and Inflammation Unit, Vlaams Instituut voor Biotechnologie (VIB) Center for Inflammation Research, 9052 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium
| | - Mathieu J M Bertrand
- Cell Death and Inflammation Unit, Vlaams Instituut voor Biotechnologie (VIB) Center for Inflammation Research, 9052 Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, 9052 Ghent, Belgium.
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3
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Yi F, Cai C, Ruan B, Hao M, Yeo SK, Haas M, Yang F, Zhang X, Guan JL. Regulation of RB1CC1/FIP200 stability and autophagy function by CREBBP-mediated acetylation in an intrinsically disordered region. Autophagy 2023; 19:1662-1677. [PMID: 36394358 PMCID: PMC10262773 DOI: 10.1080/15548627.2022.2148432] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/09/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022] Open
Abstract
RB1CC1/FIP200 is an essential macroautophagy/autophagy protein that plays an important role in a variety of biological and disease processes through its canonical autophagy-dependent and -independent functions. However, it remains largely unknown whether post-translational modifications could regulate RB1CC1 and its associated autophagy functions. Here, we report acetylation of several lysine residues of RB1CC1 by acetyltransferase CREBBP (CREB binding protein), with K276 as the major CREBBP acetylation site. K276 is also identified as a ubiquitination site by mass spectrometry, and acetylation at this site reduces ubiquitination of RB1CC1 to inhibit its ubiquitin-dependent degradation. We also find that RB1CC1 contains an N-terminal intrinsically disordered region (IDR) capable of forming liquid-liquid phase separation (LLPS) in vitro, which may drive formation of RB1CC1 puncta with LLPS properties in cells independent of SQSTM1/p62 and other autophagy receptors CALCOCO2/NDP52, NBR1, TAX1BP1 and OPTN. Mutational analysis shows that both K276 acetylation and the N-terminal IDR containing it are important for maintaining canonical autophagy function of RB1CC1 in breast cancer cells. Our findings demonstrate regulation of RB1CC1 by a new post-translational mechanism and suggest potential therapeutic application of inducing RB1CC1 degradation through blocking K276 acetylation in the treatment of cancer and other diseases.Abbreviations: Baf-A1: bafilomycin A1; CREBBP/CBP: CREB binding protein; CHX: cycloheximide; EP300/p300: E1A binding protein p300; FRAP: fluorescence recovery after photobleaching; HADCs: histone deacetylases; IDR: intrinsically disordered region; LLPS: liquid-liquid phase separation; KAT2A/GCN5: lysine acetyltransferase 2A; KAT2B/PCAF: lysine acetyltransferase 2B; KAT5/TIP60: lysine acetyltransferase 5; KAT8/MOF: lysine acetyltransferase 8; NAM: nicotinamide; PAS: phagophore assembly site; PEG-8000: polyethylene glycol 8000; RB1CC1/FIP200: RB1 inducible coiled-coil 1; TSA: trichostatin A.
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Affiliation(s)
- Fei Yi
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Chunmiao Cai
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Banzhan Ruan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Mingang Hao
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Syn Kok Yeo
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Michael Haas
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Fuchun Yang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Xiaoting Zhang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH45267, USA
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4
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Autophagy inhibition prevents lymphatic malformation progression to lymphangiosarcoma by decreasing osteopontin and Stat3 signaling. Nat Commun 2023; 14:978. [PMID: 36813768 PMCID: PMC9946935 DOI: 10.1038/s41467-023-36562-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/06/2023] [Indexed: 02/24/2023] Open
Abstract
Lymphatic malformation (LM) is a vascular anomaly originating from lymphatic endothelial cells (ECs). While it mostly remains a benign disease, a fraction of LM patients progresses to malignant lymphangiosarcoma (LAS). However, very little is known about underlying mechanisms regulating LM malignant transformation to LAS. Here, we investigate the role of autophagy in LAS development by generating EC-specific conditional knockout of an essential autophagy gene Rb1cc1/FIP200 in Tsc1iΔEC mouse model for human LAS. We find that Fip200 deletion blocked LM progression to LAS without affecting LM development. We further show that inhibiting autophagy by genetical ablation of FIP200, Atg5 or Atg7, significantly inhibited LAS tumor cell proliferation in vitro and tumorigenicity in vivo. Transcriptional profiling of autophagy-deficient tumor cells and additional mechanistic analysis determine that autophagy plays a role in regulating Osteopontin expression and its down-stream Jak/Stat3 signaling in tumor cell proliferation and tumorigenicity. Lastly, we show that specifically disrupting FIP200 canonical autophagy function by knocking-in FIP200-4A mutant allele in Tsc1iΔEC mice blocked LM progression to LAS. These results demonstrate a role for autophagy in LAS development, suggesting new strategies for preventing and treating LAS.
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5
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Errichiello E, Giorda R, Gambale A, Iolascon A, Zuffardi O, Giglio S. RB1CC1 duplication and aberrant overexpression in a patient with schizophrenia: further phenotype delineation and proposal of a pathogenetic mechanism. Mol Genet Genomic Med 2020; 9:e1561. [PMID: 33340270 PMCID: PMC7963413 DOI: 10.1002/mgg3.1561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/20/2020] [Accepted: 11/05/2020] [Indexed: 12/26/2022] Open
Abstract
Background Copy number variants in coding and noncoding genomic regions have been implicated as risk factor for schizophrenia (SCZ). Rare duplications of the RB1CC1 gene were found enriched in SCZ patients. Considering that the effect of such duplications on RB1CC1 expression has never been evaluated and partial gene duplications of RB1CC1 have also been reported in SCZ patients, it is unclear whether the pathogenesis is mediated by haploinsufficiency rather than genuine overexpression of the gene. Methods and Results We studied a patient with schizophrenia, suicidality, and obesity, who carried a de novo RB1CC1 complete duplication, as assessed by high‐resolution array‐CGH. Molecular breakpoint cloning allowed to identify nonhomologous end joining (NHEJ) as driving mechanism in this rearrangement. On the contrary, trio‐based whole‐exome sequencing excluded other potential causative variants related to the phenotype. Functional assays showed significant overexpression of RB1CC1 in the peripheral blood lymphocytes of the proband compared to control subjects, suggesting overdosage as leading mechanism in SCZ pathophysiology. Conclusion We hypothesized a pathogenetic model that might explain the correlation between RB1CC1 overexpression and schizophrenia by altering different cell signaling pathways, including autophagy, a promising therapeutic target for schizophrenic patients.
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Affiliation(s)
- Edoardo Errichiello
- Unit of Medical Genetics, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Roberto Giorda
- Laboratory of Molecular Biology, Scientific Institute IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Antonella Gambale
- Department of Molecular Medicine and Medical Biotechnologies, University "Federico II" of Naples, Naples, Italy.,CEINGE, Advanced Biotechnologies, Naples, Italy
| | - Achille Iolascon
- Department of Molecular Medicine and Medical Biotechnologies, University "Federico II" of Naples, Naples, Italy.,CEINGE, Advanced Biotechnologies, Naples, Italy
| | - Orsetta Zuffardi
- Unit of Medical Genetics, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Sabrina Giglio
- Unit of Medical Genetics, Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
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6
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Yeo SK, Wang C, Guan JL. Role of FIP200 in inflammatory processes beyond its canonical autophagy function. Biochem Soc Trans 2020; 48:1599-1607. [PMID: 32662824 DOI: 10.1042/bst20191156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 12/17/2022]
Abstract
FIP200 (RB1CC1) is a critical regulator of canonical macroautophagy and has also emerged as a crucial regulator of selective autophagy as well as inflammatory processes. The illumination of FIP200's role in autophagy at the molecular level has been accompanied by studies demonstrating the importance of its autophagy function in physiological processes in mammals and pathological contexts such as cancer. However, there is an increasing appreciation that most, if not all of the autophagy genes, also play a role in other processes such as LC3-associated phagocytosis, vesicle trafficking and protein secretion. Consequently, this has led to efforts in generating specific mutants of autophagy genes that are more amenable to dissecting their autophagy versus non-autophagy functions. In this aspect, we have generated a FIP200 knock-in mouse allele that is defective for canonical macroautophagy. This has revealed a canonical-autophagy-independent function of FIP200 that is responsible for limiting pro-inflammatory signaling. In this review, we will discuss FIP200's role in this process, the implications with regards to cancer immunotherapy and highlight key prospective avenues to specifically dissect the distinct functions of FIP200.
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Affiliation(s)
- Syn Kok Yeo
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, U.S.A
| | - Chenran Wang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, U.S.A
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, U.S.A
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7
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Okamoto T, Yeo SK, Hao M, Copley MR, Haas MA, Chen S, Guan JL. FIP200 Suppresses Immune Checkpoint Therapy Responses in Breast Cancers by Limiting AZI2/TBK1/IRF Signaling Independent of Its Canonical Autophagy Function. Cancer Res 2020; 80:3580-3592. [PMID: 32580962 DOI: 10.1158/0008-5472.can-20-0519] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/15/2020] [Accepted: 06/15/2020] [Indexed: 12/19/2022]
Abstract
Immune checkpoint inhibitors (ICI) have the potential to induce durable therapeutic responses, yet response rates in breast cancer are modest and limited to particular subtypes. To expand the applicability of ICI, we examined the role of an essential autophagy gene, FIP200, which has been shown to be important for tumor progression in mammary tumors. Specific disruption of the autophagy function of FIP200 or complete ablation of FIP200 in genetic mouse models revealed that FIP200 autophagy function was required for progression of PyMT-driven mammary tumors. However, a noncanonical autophagy function of FIP200 was responsible for limiting T-cell recruitment and activation of the TBK1-IFN signaling axis. FIP200 also interacted with the TBK1 adaptor protein, AZI2, which was crucial for activation of TBK1 following FIP200 ablation. Accordingly, disrupting the noncanonical autophagy function of FIP200 in combination with ICI therapy led to superior, durable responses in immune-competent models of breast cancer. Collectively, these insights could guide future development of therapeutic agents against FIP200 for combinatorial ICI therapies in nonresponsive breast cancers. SIGNIFICANCE: These findings show that deletion of FIP200 enhances immune checkpoint inhibitor efficacy in nonresponsive breast cancer.
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Affiliation(s)
- Takako Okamoto
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Syn Kok Yeo
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Mingang Hao
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Mary Rose Copley
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Michael A Haas
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Song Chen
- Translational Research Institute, Henan Provincial People's Hospital, Academy of Medical Science, Zhengzhou University, Zhengzhou, China.
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio.
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8
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Chen J, Xing C, Yan L, Wang Y, Wang H, Zhang Z, Yu D, Li J, Li H, Li J, Cai Y. Transcriptome profiling reveals the role of ZBTB38 knock-down in human neuroblastoma. PeerJ 2019; 7:e6352. [PMID: 30697495 PMCID: PMC6348090 DOI: 10.7717/peerj.6352] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 12/27/2018] [Indexed: 12/11/2022] Open
Abstract
ZBTB38 belongs to the zinc finger protein family and contains the typical BTB domains. As a transcription factor, ZBTB38 is involved in cell regulation, proliferation and apoptosis, whereas, functional deficiency of ZBTB38 induces the human neuroblastoma (NB) cell death potentially. To have some insight into the role of ZBTB38 in NB development, high throughput RNA sequencing was performed using the human NB cell line SH-SY5Y with the deletion of ZBTB38. In the present study, 2,438 differentially expressed genes (DEGs) in ZBTB38−/− SH-SY5Y cells were obtained, 83.5% of which was down-regulated. Functional annotation of the DEGs in the Kyoto Encyclopedia of Genes and Genomes database revealed that most of the identified genes were enriched in the neurotrophin TRK receptor signaling pathway, including PI3K/Akt and MAPK signaling pathway. we also observed that ZBTB38 affects expression of CDK4/6, Cyclin E, MDM2, ATM, ATR, PTEN, Gadd45, and PIGs in the p53 signaling pathway. In addition, ZBTB38 knockdown significantly suppresses the expression of autophagy-related key genes including PIK3C2A and RB1CC1. The present meeting provides evidence to molecular mechanism of ZBTB38 modulating NB development and targeted anti-tumor therapies.
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Affiliation(s)
- Jie Chen
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China.,College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.,The Secondary Hospital of Wuhu, WuHu, China
| | - Chaofeng Xing
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China.,College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Li Yan
- Department of Radiation Oncology, Linyi People Hospital, Linyi, China
| | - Yabing Wang
- The First Affiliated Hospital of Wannan Medical College, WuHu, China
| | | | - Zongmeng Zhang
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China
| | - Daolun Yu
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China
| | - Jie Li
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China
| | - Honglin Li
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta State University, Augusta, GA, USA
| | - Jun Li
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, WuHu, China
| | - Yafei Cai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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9
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Chen J, Yan L, Wang H, Zhang Z, Yu D, Xing C, Li J, Li H, Li J, Cai Y. ZBTB38, a novel regulator of autophagy initiation targeted by RB1CC1/FIP200 in spinal cord injury. Gene 2018; 678:8-16. [PMID: 30075197 DOI: 10.1016/j.gene.2018.07.073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 07/03/2018] [Accepted: 07/29/2018] [Indexed: 12/22/2022]
Abstract
Apoptosis is an important contributing factor in spinal cord injury (SCI). ZBTB38 is involved in the transcriptional regulation of multiple signaling pathways, is differentially expressed at different SCI stages, and may provide a therapeutic strategy for the treatment of patients with SCI. In this study, we found that autophagy is blocked in ZBTB38 knockdown SH-SY5Y cells and that the expression levels of LC3B II/I decreased and P62 increased. We used transcriptome high-throughput sequencing to identify the target in ZBTB38 knockdown cells. From the transcriptome profile, RB1CC1 (i.e., FIP200), a key component of the initiation machinery of autophagy (FIP200-ATG13-ULK1-ATG101), was found to decrease 4.2-fold following ZBTB38 knockdown. When RB1CC1-overexpressed plasmids were transfected into ZBTB38 knockdown cells, they rescued the phenotype of ZBTB38 knockdown cells. Cell proliferation and viability were significantly enhanced by RB1CC1 overexpression, and LC3B and P62 expression returned to their original levels. We also injected ZBTB38-overexpressed lentivirus into the injured center of the spinal cord and detected significant upregulation of RB1CC1 in the spinal cord. ZBTB38 overexpression can promote autophagy and partly rescue the secondary damage of SCI. Therefore, our findings provide a new strategy for the treatment of SCI.
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Affiliation(s)
- Jie Chen
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China; College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; The Secondary Hospital of Wuhu, Wuhu 241000, China
| | - Li Yan
- Department of Radiation Oncology, Linyi People Hospital, 276003, China
| | | | - Zengmeng Zhang
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China
| | - Daolun Yu
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China
| | - Chaofeng Xing
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China
| | - Jie Li
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China
| | - Honglin Li
- Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jun Li
- College of Life Sciences, Anhui Provincial Key Lab of the Conservation and Exploitation of Biological Resources, Anhui Normal University, Wuhu 241000, China.
| | - Yafei Cai
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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10
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Yeo SK, Paul R, Haas M, Wang C, Guan JL. Improved efficacy of mitochondrial disrupting agents upon inhibition of autophagy in a mouse model of BRCA1-deficient breast cancer. Autophagy 2018; 14:1214-1225. [PMID: 29938573 DOI: 10.1080/15548627.2018.1460010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Breast cancer is a heterogeneous disease, and stratification of patients is fundamental to the success of treatment modalities. Breast tumors deficient in BRCA1 are mostly associated with basal-like breast cancers and targeted therapeutics for this disease subtype are still lacking. In order to address whether macroautophagy/autophagy inhibition will be effective in BRCA1-deficient mammary tumors, we generated mice with conditional deletion of an essential autophagy gene, Rb1cc1, along with Brca1 and Trp53, through utilization of the K14-Cre transgene. We found that Rb1cc1 deletion suppressed tumorigenesis in the BRCA1-deficient model when compared to wild type and heterozygous Rb1cc1 controls. However, in contrast to previous studies in the mouse mammary tumor virus (MMTV)-polyoma middle T antigen (PyMT) model, tumor growth and the distribution of histological subtypes were not affected by loss of RB1CC1. Interestingly, loss of RB1CC1 decreased mitochondrial mass and oxidative respiratory capacity of these tumor cells, along with a decrease in the phosphorylation of MTOR substrates and transcript levels of genes involved in mitochondrial biogenesis. Importantly, we observed an increased sensitivity to mitochondrial disrupting agents upon loss of RB1CC1. Consequently, our data showed that combination of an autophagy inhibitor, spautin-1, along with a mitochondrial complex I inhibitor, metformin, was more effective in limiting oxidative respiratory capacity, colony-forming ability and tumor growth. Altogether, our results indicate that inhibition of autophagy can increase the benefits of metformin treatment in BRCA1-deficient breast cancers.
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Affiliation(s)
- Syn Kok Yeo
- a Department of Cancer Biology , University of Cincinnati College of Medicine , Cincinnati , OH , USA
| | - Ritama Paul
- a Department of Cancer Biology , University of Cincinnati College of Medicine , Cincinnati , OH , USA
| | - Michael Haas
- a Department of Cancer Biology , University of Cincinnati College of Medicine , Cincinnati , OH , USA
| | - Chenran Wang
- a Department of Cancer Biology , University of Cincinnati College of Medicine , Cincinnati , OH , USA
| | - Jun-Lin Guan
- a Department of Cancer Biology , University of Cincinnati College of Medicine , Cincinnati , OH , USA
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11
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Li W, Tanikawa T, Kryczek I, Xia H, Li G, Wu K, Wei S, Zhao L, Vatan L, Wen B, Shu P, Sun D, Kleer C, Wicha M, Sabel M, Tao K, Wang G, Zou W. Aerobic Glycolysis Controls Myeloid-Derived Suppressor Cells and Tumor Immunity via a Specific CEBPB Isoform in Triple-Negative Breast Cancer. Cell Metab 2018; 28:87-103.e6. [PMID: 29805099 PMCID: PMC6238219 DOI: 10.1016/j.cmet.2018.04.022] [Citation(s) in RCA: 256] [Impact Index Per Article: 42.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 09/15/2017] [Accepted: 04/30/2018] [Indexed: 12/16/2022]
Abstract
Myeloid-derived suppressor cells (MDSCs) inhibit anti-tumor immunity. Aerobic glycolysis is a hallmark of cancer. However, the link between MDSCs and glycolysis is unknown in patients with triple-negative breast cancer (TNBC). Here, we detect abundant glycolytic activities in human TNBC. In two TNBC mouse models, 4T1 and Py8119, glycolysis restriction inhibits tumor granulocyte colony-stimulating factor (G-CSF) and granulocyte macrophage colony-stimulating factor (GM-CSF) expression and reduces MDSCs. These are accompanied with enhanced T cell immunity, reduced tumor growth and metastasis, and prolonged mouse survival. Mechanistically, glycolysis restriction represses the expression of a specific CCAAT/enhancer-binding protein beta (CEBPB) isoform, liver-enriched activator protein (LAP), via the AMP-activated protein kinase (AMPK)-ULK1 and autophagy pathways, whereas LAP controls G-CSF and GM-CSF expression to support MDSC development. Glycolytic signatures that include lactate dehydrogenase A correlate with high MDSCs and low T cells, and are associated with poor human TNBC outcome. Collectively, tumor glycolysis orchestrates a molecular network of the AMPK-ULK1, autophagy, and CEBPB pathways to affect MDSCs and maintain tumor immunosuppression.
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Affiliation(s)
- Wei Li
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA; Department of Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1277, Wuhan, Hubei 430022, China
| | - Takashi Tanikawa
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Ilona Kryczek
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Houjun Xia
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Gaopeng Li
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Ke Wu
- Department of Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1277, Wuhan, Hubei 430022, China
| | - Shuang Wei
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Lili Zhao
- Department of Biostatistics, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Linda Vatan
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA
| | - Bo Wen
- Department of Pharmaceutical Sciences, University of Michigan College of Pharmacy, Ann Arbor, MI, USA
| | - Pan Shu
- Department of Pharmaceutical Sciences, University of Michigan College of Pharmacy, Ann Arbor, MI, USA
| | - Duxin Sun
- Department of Pharmaceutical Sciences, University of Michigan College of Pharmacy, Ann Arbor, MI, USA; University of Michigan Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Celina Kleer
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Max Wicha
- University of Michigan Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA; Department of Medicine, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Michael Sabel
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA; University of Michigan Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Kaixiong Tao
- Department of Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1277, Wuhan, Hubei 430022, China.
| | - Guobin Wang
- Department of Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1277, Wuhan, Hubei 430022, China.
| | - Weiping Zou
- Department of Surgery, University of Michigan School of Medicine, BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-0669, USA; University of Michigan Rogel Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI, USA; Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, USA; Graduate Programs in Immunology and Tumor Biology, University of Michigan School of Medicine, Ann Arbor, MI, USA.
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12
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Pandey A, Ding SL, Qin QM, Gupta R, Gomez G, Lin F, Feng X, Fachini da Costa L, Chaki SP, Katepalli M, Case ED, van Schaik EJ, Sidiq T, Khalaf O, Arenas A, Kobayashi KS, Samuel JE, Rivera GM, Alaniz RC, Sze SH, Qian X, Brown WJ, Rice-Ficht A, Russell WK, Ficht TA, de Figueiredo P. Global Reprogramming of Host Kinase Signaling in Response to Fungal Infection. Cell Host Microbe 2017; 21:637-649.e6. [PMID: 28494245 DOI: 10.1016/j.chom.2017.04.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 03/12/2017] [Accepted: 04/24/2017] [Indexed: 12/26/2022]
Abstract
Cryptococcus neoformans (Cn) is a deadly fungal pathogen whose intracellular lifestyle is important for virulence. Host mechanisms controlling fungal phagocytosis and replication remain obscure. Here, we perform a global phosphoproteomic analysis of the host response to Cryptococcus infection. Our analysis reveals numerous and diverse host proteins that are differentially phosphorylated following fungal ingestion by macrophages, thereby indicating global reprogramming of host kinase signaling. Notably, phagocytosis of the pathogen activates the host autophagy initiation complex (AIC) and the upstream regulatory components LKB1 and AMPKα, which regulate autophagy induction through their kinase activities. Deletion of Prkaa1, the gene encoding AMPKα1, in monocytes results in resistance to fungal colonization of mice. Finally, the recruitment of AIC components to nascent Cryptococcus-containing vacuoles (CnCVs) regulates the intracellular trafficking and replication of the pathogen. These findings demonstrate that host AIC regulatory networks confer susceptibility to infection and establish a proteomic resource for elucidating host mechanisms that regulate fungal intracellular parasitism.
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Affiliation(s)
- Aseem Pandey
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA; Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA; Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Sheng Li Ding
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA; Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA; Department of Plant Pathology, College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, Henan, China
| | - Qing-Ming Qin
- College of Plant Sciences, Jilin University, Changchun 130062, Jilin, China; Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun 130062, Jilin, China
| | - Rahul Gupta
- Health and Engineering Group, Leidos Inc., 2295 Parklake Drive, Atlanta, GA 30345, USA
| | - Gabriel Gomez
- Texas A&M Veterinary Medical Diagnostic Laboratory, Texas A&M University, College Station, Texas 77843, USA
| | - Furong Lin
- Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA
| | - Xuehuan Feng
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA; Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA
| | - Luciana Fachini da Costa
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA; Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA; Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Sankar P Chaki
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Madhu Katepalli
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Elizabeth D Case
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Erin J van Schaik
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Tabasum Sidiq
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Omar Khalaf
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Angela Arenas
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Koichi S Kobayashi
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - James E Samuel
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Gonzalo M Rivera
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA
| | - Robert C Alaniz
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - Sing-Hoi Sze
- Center for Bioinformatics & Genomic Systems Engineering, Texas A&M University, College Station, Texas 77843, USA; Department of Computer Science and Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, Texas 77843, USA; Department of Biochemistry & Biophysics, Texas A&M University, College Station, Texas 77843, USA
| | - Xiaoning Qian
- Center for Bioinformatics & Genomic Systems Engineering, Texas A&M University, College Station, Texas 77843, USA; Department of Electrical and Computer Engineering, Dwight Look College of Engineering, Texas A&M University, College Station, Texas 77843, USA
| | - William J Brown
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853-2703, USA
| | - Allison Rice-Ficht
- Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M Health Science Center, College Station, Texas 77843, USA
| | - William K Russell
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77555, USA.
| | - Thomas A Ficht
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA.
| | - Paul de Figueiredo
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, College Station, Texas 77843, USA; Norman Borlaug Center, Texas A&M University, College Station, Texas 77843, USA; Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A&M University, College Station, Texas 77843, USA.
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13
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Xia H, Wang W, Crespo J, Kryczek I, Li W, Wei S, Bian Z, Maj T, He M, Liu RJ, He Y, Rattan R, Munkarah A, Guan JL, Zou W. Suppression of FIP200 and autophagy by tumor-derived lactate promotes naïve T cell apoptosis and affects tumor immunity. Sci Immunol 2017; 2:eaan4631. [PMID: 29150439 PMCID: PMC5774333 DOI: 10.1126/sciimmunol.aan4631] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 10/06/2017] [Indexed: 12/13/2022]
Abstract
Naïve T cells are poorly studied in cancer patients. We report that naïve T cells are prone to undergo apoptosis due to a selective loss of FAK family-interacting protein of 200 kDa (FIP200) in ovarian cancer patients and tumor-bearing mice. This results in poor antitumor immunity via autophagy deficiency, mitochondria overactivation, and high reactive oxygen species production in T cells. Mechanistically, loss of FIP200 disables the balance between proapoptotic and antiapoptotic Bcl-2 family members via enhanced argonaute 2 (Ago2) degradation, reduced Ago2 and microRNA1198-5p complex formation, less microRNA1198-5p maturation, and consequently abolished microRNA1198-5p-mediated repression on apoptotic gene Bak1 Bcl-2 overexpression and mitochondria complex I inhibition rescue T cell apoptosis and promoted tumor immunity. Tumor-derived lactate translationally inhibits FIP200 expression by down-regulating the nicotinamide adenine dinucleotide level while potentially up-regulating the inhibitory effect of adenylate-uridylate-rich elements within the 3' untranslated region of Fip200 mRNA. Thus, tumors metabolically target naïve T cells to evade immunity.
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Affiliation(s)
- Houjun Xia
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Wei Wang
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Department of Immunology and Key Laboratory of Medical Immunology of Ministry of Public Health, Peking University Health Science Center, Beijing 100191, China
| | - Joel Crespo
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Graduate Program in Immunology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Ilona Kryczek
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Graduate Program in Immunology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Wei Li
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Shuang Wei
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Zhaoqun Bian
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Department of Environmental Health, Cincinnati University College of Medicine, Cincinnati, OH 45267, USA
| | - Tomasz Maj
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Mingxiao He
- Department of Immunology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Rebecca J Liu
- Department of Obstetrics and Gynecology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
| | - Youwen He
- Department of Immunology, School of Medicine, Duke University, Durham, NC 27710, USA
| | - Ramandeep Rattan
- Department of Women's Health Services, Henry Ford Health System, Detroit, MI 48202, USA
| | - Adnan Munkarah
- Department of Women's Health Services, Henry Ford Health System, Detroit, MI 48202, USA
| | - Jun-Lin Guan
- Department of Cancer Biology, Cincinnati University College of Medicine, Cincinnati, OH 45267, USA
| | - Weiping Zou
- Department of Surgery, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA.
- Graduate Program in Immunology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- Graduate Program in Tumor Biology, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
- University of Michigan Comprehensive Cancer Center, University of Michigan School of Medicine, Ann Arbor, MI 48109, USA
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14
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Mainz L, Rosenfeldt MT. Autophagy and cancer - insights from mouse models. FEBS J 2017; 285:792-808. [PMID: 28921866 DOI: 10.1111/febs.14274] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 08/10/2017] [Accepted: 09/13/2017] [Indexed: 01/09/2023]
Abstract
(Macro-)autophagy is an evolutionary conserved 'self-digestion program' that serves to maintain cellular metabolism and is implicated in many pathological processes such as cancer. In recent years, an increasing number of studies in murine cancer models have provided a plethora of sometimes conflicting results about the role of autophagy in cancer biology. This review summarizes these studies and raises awareness that there are situations in which autophagy blockage might indeed reduce tumor growth, but that sometimes the exact opposite is the case. It is therefore vital to mimic patient conditions in preclinical mouse experiments as thoroughly as possible before commencing clinical trials.
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Affiliation(s)
- Laura Mainz
- Institute for Pathology, Germany & Comprehensive Cancer Center Mainfranken, University of Wuerzburg, Germany
| | - Mathias T Rosenfeldt
- Institute for Pathology, Germany & Comprehensive Cancer Center Mainfranken, University of Wuerzburg, Germany
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15
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Wei H, Cui R, Bahr J, Zanesi N, Luo Z, Meng W, Liang G, Croce CM. miR-130a Deregulates PTEN and Stimulates Tumor Growth. Cancer Res 2017; 77:6168-6178. [PMID: 28935812 DOI: 10.1158/0008-5472.can-17-0530] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 07/28/2017] [Accepted: 09/12/2017] [Indexed: 02/07/2023]
Abstract
H-RasV12 oncogene has been shown to promote autophagic cell death. Here, we provide evidence of a contextual role for H-RasV12 in cell death that is varied by its effects on miR-130a. In E1A-immortalized murine embryo fibroblasts, acute expression of H-RasV12 promoted apoptosis, but not autophagic cell death. miRNA screens in this system showed that miR-130a was strongly downregulated by H-RasV12 in this model system. Enforced expression of miR-130a increased cell proliferation in part via repression of PTEN. Consistent with this effect, miR-130a overexpression in human breast cancer cells promoted Akt phosphorylation, cell survival, and tumor growth. In clinical specimens of multiple human cancers, expression of miR-130 family members correlated inversely with PTEN expression. Overall, our results defined miR-130a as an oncogenic miRNA that targets PTEN to drive malignant cell survival and tumor growth. Cancer Res; 77(22); 6168-78. ©2017 AACR.
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Affiliation(s)
- Huijun Wei
- University of Michigan Life Sciences Institute, Ann Arbor, Michigan. .,Department of Cancer Biology and Genetics, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Ri Cui
- Department of Cancer Biology and Genetics, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.,Affiliated Yueqing Hospital and School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Julian Bahr
- University of Michigan Life Sciences Institute, Ann Arbor, Michigan
| | - Nicola Zanesi
- Department of Cancer Biology and Genetics, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Zhenghua Luo
- Department of Cancer Biology and Genetics, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Wei Meng
- Department of Radiation Oncology, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Guang Liang
- Affiliated Yueqing Hospital and School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Carlo M Croce
- Department of Cancer Biology and Genetics, and Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.
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16
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Wang C, Yeo S, Haas MA, Guan JL. Autophagy gene FIP200 in neural progenitors non-cell autonomously controls differentiation by regulating microglia. J Cell Biol 2017. [PMID: 28634261 PMCID: PMC5551701 DOI: 10.1083/jcb.201609093] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Recent studies have shown important roles for autophagy genes in the regulation of different tissue stem cells, including neural stem/progenitor cells (NSCs). However, little is known about whether autophagy can regulate NSCs through cell-extrinsic mechanisms. Here, we show that deletion of an essential autophagy gene, FIP200, in NSCs increased expression of Ccl5 and Cxcl10 in a p53-independent manner, mediating increased infiltration of microglia into the subventricular zone of both FIP200hGFAP conditional knockout (cKO) and FIP200;p53hGFAP 2cKO mice. The microglia exhibited an activated M1 phenotype consistent with their potential to inhibit differentiation of FIP200-null NSCs. Blocking either microglia infiltration or activation rescued the deficient differentiation of FIP200-null NSCs from FIP200;p53hGFAP 2cKO mice. Lastly, we showed that increased chemokine expression in FIP200-null NSCs was induced by abnormal p62 aggregate formation and activation of NF-κB signaling. Our results suggest that autophagy plays a crucial role in regulating neurogenesis and restricting local immune response in postnatal NSCs through non-cell autonomous mechanisms.
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Affiliation(s)
- Chenran Wang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Syn Yeo
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Michael A Haas
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH
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17
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Chen S, Wang C, Yeo S, Liang CC, Okamoto T, Sun S, Wen J, Guan JL. Distinct roles of autophagy-dependent and -independent functions of FIP200 revealed by generation and analysis of a mutant knock-in mouse model. Genes Dev 2016; 30:856-69. [PMID: 27013233 PMCID: PMC4826400 DOI: 10.1101/gad.276428.115] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 02/29/2016] [Indexed: 12/19/2022]
Abstract
Chen et al. generated a FIP200-4A mutant knock-in mouse model and found that specifically blocking FIP200 interaction with Atg13 abolishes autophagy in vivo. Analysis of the new mouse model showed that nonautophagic functions of FIP200 are sufficient to fully support embryogenesis by maintaining a protective role in TNFα-induced apoptosis. However, FIP200-mediated canonical autophagy is required to support neonatal survival and tumor cell growth. Autophagy is an evolutionarily conserved cellular process controlled through a set of essential autophagy genes (Atgs). However, there is increasing evidence that most, if not all, Atgs also possess functions independent of their requirement in canonical autophagy, making it difficult to distinguish the contributions of autophagy-dependent or -independent functions of a particular Atg to various biological processes. To distinguish these functions for FIP200 (FAK family-interacting protein of 200 kDa), an Atg in autophagy induction, we examined FIP200 interaction with its autophagy partner, Atg13. We found that residues 582–585 (LQFL) in FIP200 are required for interaction with Atg13, and mutation of these residues to AAAA (designated the FIP200-4A mutant) abolished its canonical autophagy function in vitro. Furthermore, we created a FIP200-4A mutant knock-in mouse model and found that specifically blocking FIP200 interaction with Atg13 abolishes autophagy in vivo, providing direct support for the essential role of the ULK1/Atg13/FIP200/Atg101 complex in the process beyond previous studies relying on the complete knockout of individual components. Analysis of the new mouse model showed that nonautophagic functions of FIP200 are sufficient to fully support embryogenesis by maintaining a protective role in TNFα-induced apoptosis. However, FIP200-mediated canonical autophagy is required to support neonatal survival and tumor cell growth. These studies provide the first genetic evidence linking an Atg's autophagy and nonautophagic functions to different biological processes in vivo.
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Affiliation(s)
- Song Chen
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Chenran Wang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Syn Yeo
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Chun-Chi Liang
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Takako Okamoto
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Shaogang Sun
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Jian Wen
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Jun-Lin Guan
- Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
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18
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The clearance of dying cells: table for two. Cell Death Differ 2016; 23:915-26. [PMID: 26990661 PMCID: PMC4987729 DOI: 10.1038/cdd.2015.172] [Citation(s) in RCA: 191] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 12/19/2022] Open
Abstract
Phagocytic cells of the immune system must constantly survey for, recognize, and efficiently clear the billions of cellular corpses that arise as a result of development, stress, infection, or normal homeostasis. This process, termed efferocytosis, is critical for the prevention of autoimmune and inflammatory disorders, and persistence of dead cells in tissue is characteristic of many human autoimmune diseases, notably systemic lupus erythematosus. The most notable characteristic of the efferocytosis of apoptotic cells is its ‘immunologically silent' response. Although the mechanisms by which phagocytes facilitate engulfment of dead cells has been a well-studied area, the pathways that coordinate to process the ingested corpse and direct the subsequent immune response is an area of growing interest. The recently described pathway of LC3 (microtubule-associated protein 1A/1B-light chain 3)-associated phagocytosis (LAP) has shed some light on this issue. LAP is triggered when an extracellular particle, such as a dead cell, engages an extracellular receptor during phagocytosis, induces the translocation of autophagy machinery, and ultimately LC3 to the cargo-containing phagosome, termed the LAPosome. In this review, we will examine efferocytosis and the impact of LAP on efferocytosis, allowing us to reimagine the impact of the autophagy machinery on innate host defense mechanisms.
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19
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Li S, Qiang Q, Shan H, Shi M, Gan G, Ma F, Chen B. MiR-20a and miR-20b negatively regulate autophagy by targeting RB1CC1/FIP200 in breast cancer cells. Life Sci 2016; 147:143-52. [PMID: 26829385 DOI: 10.1016/j.lfs.2016.01.044] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 12/15/2015] [Accepted: 01/28/2016] [Indexed: 12/12/2022]
Abstract
AIMS RB1CC1/FIP200 was essential for autophagosome formation. Therefore, RB1CC1/FIP200 cellular levels are critical for the activation of the autophagy pathways. Following the screen of miRNAs affecting RB1CC1/FIP200 level and rapamycin-induced autophagy, we discovered miR-20a and miR-20b could regulate autophagy by targeting RB1CC1/FIP200. MAIN METHODS Inhibitory effect of miR-20a and 20b on basal and rapamycin-stimulated autophagy was demonstrated using various autophagic tests including GFP-LC3 puncta analysis, LC3II/LC3I gel shift and TEM observation. KEY FINDINGS We discovered RB1CC1/FIP200 as cellular targets of miR-20a and miR-20b. Upon miR-20a and miR-20b overexpression, both mRNA and protein levels of RB1CC1/FIP200 decreased. miR-20a and miR-20b target sequences present in the 3' UTR of RB1CC1/FIP200 mRNAs and introduction of mutations abolished the miR-20a and miR-20b responsiveness. In MCF7 and MDA-MB-231 breast cancer cells, miR-20a and miR-20b over-expression attenuated basal and rapamycin-induced autophagy; while suppression of miR-20a or miR-20b by specific antagomir showed normal rapamycin-induced autophagic activity. SIGNIFICANCE To our knowledge, this is the first study showing the significance of miR-20a and miR-20b regulating autophagy by targeting RB1CC1/FIP200.
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Affiliation(s)
- Shufeng Li
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China.
| | - Qian Qiang
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Haitao Shan
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Minke Shi
- Department of Thoracic and Cardiovascular Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Guangming Gan
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Fang Ma
- Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Department of Biochemistry and Molecular Biology, Medical School of Southeast University, Nanjing 210009, China
| | - Baojun Chen
- Department of Thoracic and Cardiovascular Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China.
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20
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Abstract
Autophagy is crucial for cellular homeostasis and plays important roles in tumorigenesis. FIP200 is an essential autophagy gene that promotes mammary tumorigenesis. Here, Wei et al. find that ablation of FIP200 reduces growth of established tumors. p62 knockdown or deficiency in established FIP200-null tumors dramatically impairs tumor growth, and this is associated with the up-regulated activation of the NF-κB pathway by p62. This study demonstrates that p62 and autophagy synergize to promote tumor growth. Autophagy is crucial for cellular homeostasis and plays important roles in tumorigenesis. FIP200 (FAK family-interacting protein of 200 kDa) is an essential autophagy gene required for autophagy induction, functioning in the ULK1–ATG13–FIP200 complex. Our previous studies showed that conditional knockout of FIP200 significantly suppressed mammary tumorigenesis, which was accompanied by accumulation of p62 in tumor cells. However, it is not clear whether FIP200 is also required for maintaining tumor growth and how the increased p62 level affects the growth in autophagy-deficient FIP200-null tumors in vivo. Here, we describe a new system to delete FIP200 in transformed mouse embryonic fibroblasts as well as mammary tumor cells following their transplantation and show that ablation of FIP200 significantly reduced growth of established tumors in vivo. Using similar strategies, we further showed that either p62 knockdown or p62 deficiency in established FIP200-null tumors dramatically impaired tumor growth. The stimulation of tumor growth by p62 accumulation in FIP200-null tumors is associated with the up-regulated activation of the NF-κB pathway by p62. Last, we showed that overexpression of the autophagy master regulator TFEBS142A increased the growth of established tumors, which correlated with the increased autophagy of the tumor cells. Together, our studies demonstrate that p62 and autophagy synergize to promote tumor growth, suggesting that inhibition of both pathways could be more effective than targeting either alone for cancer therapy.
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Affiliation(s)
- Huijun Wei
- Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA; Ohio State University Comprehensive Cancer Center, Columbus, Ohio 43210, USA
| | - Chenran Wang
- Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA; Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Carlo M Croce
- Ohio State University Comprehensive Cancer Center, Columbus, Ohio 43210, USA
| | - Jun-Lin Guan
- Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA; Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
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21
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Li Y, Gan CP, Zhang S, Zhou XK, Li XF, Wei YQ, Yang JL, Wu M. FIP200 is involved in murine pseudomonas infection by regulating HMGB1 intracellular translocation. Cell Physiol Biochem 2014; 33:1733-44. [PMID: 24923305 PMCID: PMC4393741 DOI: 10.1159/000362954] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2014] [Indexed: 02/05/2023] Open
Abstract
Background FIP200, a critical autophagy initiating protein, can participate in numerous cellular functions including cancer development; however, its functional role in P. aeruginosa infection of alveolar macrophages is unknown. Methods To investigate the role of FIP200 in host defense, we transfected murine alveolar macrophage MH-S cells with FIP200 siRNA. Having confirmed that FIP200 knockdown inhibited PAO1-induced autophagosme formation, we sought to characterize the underlying signaling pathways by immunoblotting. Further, we used fip200 KO mice to study the effects of fip200 deficiency on HMGB1 translocation. Results We showed that Pseudomonas PAO1 strain infection facilitated autophagosome formation, whereas knockdown of FIP200 inhibited autophagosome formation and HMGB1 expression in MH-S cells. Silencing FIP200 impaired the translocation of HMGB1 to cytosol of MH-S cells and almost abolished acetylation of HMGB1 during PAO1 infection. In contrast, FIP200 overexpression facilitated the cytosol translocation of HMGB1 from nuclei and increased acetylation of HMGB1 in PAO1-infected MH-S cells. Importantly, expression and acetylation of HMGB1 were also significantly down-regulated in fip200 KO mice following PAO1 infection. Conclusions Collectively, these findings elucidate that FIP200 may regulate expression and translocation of HMGB1 during PAO1 infection, which may indicate novel therapeutic targets to control pulmonary infection.
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Affiliation(s)
- Yi Li
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
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22
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Wang C, Liang CC, Bian ZC, Zhu Y, Guan JL. FIP200 is required for maintenance and differentiation of postnatal neural stem cells. Nat Neurosci 2013; 16:532-42. [PMID: 23542691 PMCID: PMC3637881 DOI: 10.1038/nn.3365] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 02/22/2013] [Indexed: 12/19/2022]
Abstract
Despite recent studies showing depletion of hematopoietic stem cells (HSCs) pool accompanied by increased intracellular ROS upon autophagy inhibition, it remains unknown whether autophagy is essential in the maintenance of other stem cells. Moreover, it is unclear whether and how the aberrant ROS increase causes depletion of stem cells. Here, we report that ablation of FIP200, an essential gene for autophagy induction in mammalian cells, results in a progressive loss of neural stem cells (NSCs) pool and impairment in neuronal differentiation specifically in the postnatal brain, but not the embryonic brain, in mice. The defect in maintaining the postnatal NSC pool was caused by p53-dependent apoptotic responses and cell cycle arrest. However, the impaired neuronal differentiation was rescued by anti-oxidant NAC treatment, but not by p53 inactivation. These data reveal a role of FIP200-mediated autophagy in the maintenance and functions of NSCs through regulation of oxidative state.
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Affiliation(s)
- Chenran Wang
- Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, USA
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23
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Choi JD, Ryu M, Ae Park M, Jeong G, Lee JS. FIP200 inhibits β-catenin-mediated transcription by promoting APC-independent β-catenin ubiquitination. Oncogene 2012; 32:2421-32. [PMID: 22751121 DOI: 10.1038/onc.2012.262] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Focal adhesion kinase-family-interacting protein of 200 kDa (FIP200) has been shown to regulate multiple cellular functions, including cell adhesion, autophagy, development and proliferation. Furthermore, FIP200 is considered to have tumor-suppressive activity, which may be correlated with its inactivation in human breast cancers, in addition to its role as an important signal transduction node. Herein, we report that FIP200 interacts with the oncoprotein β-catenin. Moreover, FIP200 promotes destabilization of wild-type β-catenin, but not a cancer-causing form of β-catenin, and as a result represses the β-catenin-mediated transcription. FIP200-induced degradation of β-catenin is independent of adenomatous polyposis coli (APC) of the well-established β-catenin destruction complex (glycogen synthase kinase-3β/axin/APC), in a component of β-catenin E3 ubiquitin ligase, β-TrCP-dependent manner. Thus, the APC-independent β-catenin degradation by FIP200 suggests a role for FIP200 in tumor suppression in the presence of APC dysfunction. These findings reveal a new and important function of FIP200 in regulation of the Wnt/β-catenin pathway.
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Affiliation(s)
- J D Choi
- Department of Molecular Science and Technology, College of Natural Sciences, Ajou University, Suwon, Korea
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24
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Abstract
Autophagy (also known as macroautophagy) captures intracellular components in autophagosomes and delivers them to lysosomes, where they are degraded and recycled. Autophagy can have two functions in cancer. It can be tumour suppressive through the elimination of oncogenic protein substrates, toxic unfolded proteins and damaged organelles. Alternatively, it can be tumour promoting in established cancers through autophagy-mediated intracellular recycling that provides substrates for metabolism and that maintains the functional pool of mitochondria. Therefore, defining the context-specific role for autophagy in cancer and the mechanisms involved will be important to guide autophagy-based therapeutic intervention.
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Affiliation(s)
- Eileen White
- The Cancer Institute of New Jersey, 195 Little Albany Street, New Brunswick, New Jersey 08903, USA.
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25
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Hama Y, Chano T, Inui T, Matsumoto K, Okabe H. Preparation of mouse monoclonal antibody for RB1CC1 and its clinical application. PLoS One 2012; 7:e32052. [PMID: 22396748 PMCID: PMC3291565 DOI: 10.1371/journal.pone.0032052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 01/21/2012] [Indexed: 11/18/2022] Open
Abstract
RB1-inducible coiled-coil 1 (RB1CC1; also known as FIP200) plays important roles in several biological pathways such as cell proliferation and autophagy. Evaluation of RB1CC1 expression can provide useful clinical information on various cancers and neurodegenerative diseases. In order to realize the clinical applications, it is necessary to establish a stable supply of antibody and reproducible procedures for the laboratory examinations. In the present study, we have generated mouse monoclonal antibodies for RB1CC1, and four kinds of antibodies (N1-8, N1-216, N3-2, and N3-42) were found to be optimal for clinical applications such as ELISA and immunoblots and work as well as the pre-existing polyclonal antibodies. N1-8 monoclonal antibody provided the best recognition of RB1CC1 in the clinico-pathological examination of formalin-fixed paraffin-embedded tissues. These monoclonal antibodies will help to generate new opportunities in scientific examinations in biology and clinical medicine.
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Affiliation(s)
- Yusuke Hama
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Tokuhiro Chano
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Shiga, Japan
- * E-mail:
| | - Takuma Inui
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Shiga, Japan
| | | | - Hidetoshi Okabe
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Shiga, Japan
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26
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Nishimura I, Chano T, Kita H, Matsusue Y, Okabe H. RB1CC1 protein suppresses type II collagen synthesis in chondrocytes and causes dwarfism. J Biol Chem 2011; 286:43925-43932. [PMID: 22049074 DOI: 10.1074/jbc.m111.264192] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
RB1-inducible coiled-coil 1 (RB1CC1) functions in various processes, such as cell growth, differentiation, senescence, apoptosis, and autophagy. The conditional transgenic mice with cartilage-specific RB1CC1 excess that were used in the present study were made for the first time by the Cre-loxP system. Cartilage-specific RB1CC1 excess caused dwarfism in mice without causing obvious abnormalities in endochondral ossification and subsequent skeletal development from embryo to adult. In vitro and in vivo analysis revealed that the dwarf phenotype in cartilaginous RB1CC1 excess was induced by reductions in the total amount of cartilage and the number of cartilaginous cells, following suppressions of type II collagen synthesis and Erk1/2 signals. In addition, we have demonstrated that two kinds of SNPs (T-547C and C-468T) in the human RB1CC1 promoter have significant influence on the self-transcriptional level. Accordingly, human genotypic variants of RB1CC1 that either stimulate or inhibit RB1CC1 transcription in vivo may cause body size variations.
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Affiliation(s)
- Ichiro Nishimura
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan; Department of Orthopedic Surgery, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Tokuhiro Chano
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
| | - Hiroko Kita
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Yoshitaka Matsusue
- Department of Orthopedic Surgery, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Hidetoshi Okabe
- Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
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27
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Wei H, Wei S, Gan B, Peng X, Zou W, Guan JL. Suppression of autophagy by FIP200 deletion inhibits mammary tumorigenesis. Genes Dev 2011; 25:1510-27. [PMID: 21764854 DOI: 10.1101/gad.2051011] [Citation(s) in RCA: 296] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Autophagy is a conserved cellular process for bulk degradation of intracellular protein and organelles in lysosomes. In contrast to elegant studies of beclin1 using mouse models and cultured cells demonstrating a tumor suppression function for autophagy, knockout of other essential autophagy proteins such as ATG5, ATG7, or FIP200 (FAK family-interacting protein of 200 kDa) in various tissues did not lead to malignant tumor development in vivo. Here, we report that inhibition of autophagy by FIP200 ablation suppresses mammary tumor initiation and progression in a mouse model of breast cancer driven by the PyMT oncogene. Deletion of FIP200 resulted in multiple autophagy defects including accumulation of ubiquitinated protein aggregates and p62/SQSTM1, deficient LC3 conversion, and increased number of mitochondria with abnormal morphology in tumor cells. FIP200 deletion did not affect apoptosis of mammary tumor cells or Ras-transformed mouse embryonic fibroblasts (MEFs), but significantly reduced their proliferation in both systems. We also observed a reduced glycolysis and cyclin D1 expression in FIP200-null mammary tumor cells and transformed MEFs. In addition, gene profiling studies revealed significantly elevated expression of interferon (IFN)-responsive genes in the early tumors of FIP200 conditional knockout mice, which was accompanied by increased infiltration of effector T cells in the tumor microenvironment triggered by an increased production of chemokines including CXCL10 in FIP200-null tumor cells. Together, these data provide strong evidence for a protumorigenesis role of autophagy in oncogene-induced tumors in vivo and suggest FIP200 as a potential target for cancer therapy.
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Affiliation(s)
- Huijun Wei
- Division of Molecular Medicine and Genetics, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, USA
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28
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Bae H, Guan JL. Suppression of autophagy by FIP200 deletion impairs DNA damage repair and increases cell death upon treatments with anticancer agents. Mol Cancer Res 2011; 9:1232-41. [PMID: 21807966 DOI: 10.1158/1541-7786.mcr-11-0098] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Autophagy is a lysosomal bulk degradation process for intracellular protein and organelles. FIP200 (200 kDa FAK-family interacting protein) is an essential component of mammalian autophagy that is implicated in breast cancer in recent studies. Here we show that inactivation of FIP200 resulted in deficient repair of DNA damage induced by ionizing radiation and anticancer agents in mouse embryonic fibroblasts (MEF). The persistent DNA damage correlated to increased apoptosis and reduced survival of FIP200 knockout (KO) MEFs after treatments with camptothecin (CPT), a topoisomerase I inhibitor and chemotherapeutic agent. Reexpression of FIP200 in FIP200 KO MEFs restored both efficient DNA damage repair and cell survival. Furthermore, knockdown of the increased p62 expression in FIP200 KO MEFs rescued the impaired DNA damage repair and CPT-induced cell death. In contrast, treatment of cells with N-acetyl cysteine did not affect these defects in FIP200 KO MEFs. Finally, FIP200 KO MEFs also showed deficient DNA damage repair and increased cell death compared with control MEFs, when treated with etoposide, a topoisomerase II inhibitor and another anticancer agent. Together, these results identify a new function for FIP200 in the regulation of DNA damage response and cell survival through its activity in autophagy and suggest the possibility of FIP200 or other autophagy proteins as a potential target for treatment to enhance the efficiency of cancer therapy using DNA damage-inducing agents.
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Affiliation(s)
- Heekyong Bae
- Department of Internal Medicine, University of Michigan Medical School, 3027 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109, USA
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29
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Koinuma D, Shinozaki M, Nagano Y, Ikushima H, Horiguchi K, Goto K, Chano T, Saitoh M, Imamura T, Miyazono K, Miyazawa K. RB1CC1 protein positively regulates transforming growth factor-beta signaling through the modulation of Arkadia E3 ubiquitin ligase activity. J Biol Chem 2011; 286:32502-12. [PMID: 21795712 PMCID: PMC3173165 DOI: 10.1074/jbc.m111.227561] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Transforming growth factor-β (TGF-β) signaling is controlled by a variety of regulators, of which Smad7, c-Ski, and SnoN play a pivotal role in its negative regulation. Arkadia is a RING-type E3 ubiquitin ligase that targets these negative regulators for degradation to enhance TGF-β signaling. In the present study we identified a candidate human tumor suppressor gene product RB1CC1/FIP200 as a novel positive regulator of TGF-β signaling that functions as a substrate-selective cofactor of Arkadia. Overexpression of RB1CC1 enhanced TGF-β signaling, and knockdown of endogenous RB1CC1 attenuated TGF-β-induced expression of target genes as well as TGF-β-induced cytostasis. RB1CC1 down-regulated the protein levels of c-Ski but not SnoN by enhancing the activity of Arkadia E3 ligase toward c-Ski. Substrate selectivity is primarily attributable to the physical interaction of RB1CC1 with substrates, suggesting its role as a scaffold protein. RB1CC1 thus appears to play a unique role as a modulator of TGF-β signaling by restricting substrate specificity of Arkadia.
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Affiliation(s)
- Daizo Koinuma
- Division of Biochemistry, The Cancer Institute of the Japanese Foundation for Cancer Research, Koto-ku, Tokyo 135-8550, Japan
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30
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Roulin D, Waselle L, Dormond-Meuwly A, Dufour M, Demartines N, Dormond O. Targeting renal cell carcinoma with NVP-BEZ235, a dual PI3K/mTOR inhibitor, in combination with sorafenib. Mol Cancer 2011; 10:90. [PMID: 21791089 PMCID: PMC3160413 DOI: 10.1186/1476-4598-10-90] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Accepted: 07/26/2011] [Indexed: 12/26/2022] Open
Abstract
Background Targeted therapies for metastatic renal cell carcinoma (RCC), including mammalian target of rapamycin (mTOR) inhibitors and small-molecule multikinase inhibitors, have produced clinical effects. However, most patients acquire resistance over time. Thus, new therapeutic strategies need to be developed. Here, we evaluated the effect of the dual PI3K/mTOR inhibitor NVP-BEZ235, in combination with the multikinase inhibitor sorafenib on renal cancer cell proliferation and survival in vitro as well as on tumor growth in vivo. Methods The renal carcinoma cell lines 786-0 and Caki-1 were treated with NVP-BEZ235 or sorafenib, either alone or in combination. Tumor cell proliferation and apoptosis were investigated in vitro. The anticancer efficacy of NVP-BEZ235 alone, or in combination with sorafenib, was also evaluated on RCC xenografts in nude mice. Results Treatment of 786-0 and Caki-1 cells with NVP-BEZ235 or sorafenib resulted in reduced tumor cell proliferation and increased tumor cell apoptosis in vitro. The combination of NVP-BEZ235 and sorafenib was more effective than each compound alone. Similarly, in vivo, NVP-BEZ235 or sorafenib reduced the growth of xenografts generated from 786-0 or Caki-1 cells. The antitumor efficacy of NVP-BEZ235 in combination with sorafenib was superior to NVP-BEZ235 or sorafenib alone. Conclusions Our findings indicate that the simultaneous use of NVP-BEZ235 and sorafenib has greater antitumor benefit compared to either drug alone and thus provides a treatment strategy in RCC.
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Affiliation(s)
- Didier Roulin
- Department of Visceral Surgery, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Pavillon 3, Av, de Beaumont, 1011 Lausanne, Switzerland
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31
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Wang D, Olman MA, Stewart J, Tipps R, Huang P, Sanders PW, Toline E, Prayson RA, Lee J, J.Weil R, Palmer CA, Gillespie GY, Liu WM, Pieper RO, Guan JL, Gladson CL. Downregulation of FIP200 induces apoptosis of glioblastoma cells and microvascular endothelial cells by enhancing Pyk2 activity. PLoS One 2011; 6:e19629. [PMID: 21602932 PMCID: PMC3094350 DOI: 10.1371/journal.pone.0019629] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 04/11/2011] [Indexed: 12/30/2022] Open
Abstract
The expression of focal adhesion kinase family interacting protein of 200-kDa (FIP200) in normal brain is limited to some neurons and glial cells. On immunohistochemical analysis of biopsies of glioblastoma tumors, we detected FIP200 in the tumor cells, tumor-associated endothelial cells, and occasional glial cells. Human glioblastoma tumor cell lines and immortalized human astrocytes cultured in complete media also expressed FIP200 as did primary human brain microvessel endothelial cells (MvEC), which proliferate in culture and resemble reactive endothelial cells. Downregulation of endogenous expression of FIP200 using small interfering RNA resulted in induction of apoptosis in the human glioblastoma tumor cells, immortalized human astrocytes, and primary human brain MvEC. It has been shown by other investigators using cells from other tissues that FIP200 can interact directly with, and inhibit, proline-rich tyrosine kinase 2 (Pyk2) and focal adhesion kinase (FAK). In the human glioblastoma tumor cells, immortalized human astrocytes, and primary human brain MvEC, we found that downregulation of FIP200 increased the activity of Pyk2 without increasing its expression, but did not affect the activity or expression of FAK. Coimmunoprecipitation and colocalization studies indicated that the endogenous FIP200 was largely associated with Pyk2, rather than FAK, in the glioblastoma tumor cells and brain MvEC. Moreover, the pro-apoptotic effect of FIP200 downregulation was inhibited significantly by a TAT-Pyk2-fusion protein containing the Pyk2 autophosphorylation site in these cells. In summary, downregulation of endogenous FIP200 protein in glioblastoma tumor cells, astrocytes, and brain MvECs promotes apoptosis, most likely due to the removal of a direct interaction of FIP200 with Pyk2 that inhibits Pyk2 activation, suggesting that FIP200 expression may be required for the survival of all three cell types found in glioblastoma tumors.
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Affiliation(s)
- Dongyan Wang
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Mitchell A. Olman
- Division of Pulmonary/Critical Care, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jerry Stewart
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Russell Tipps
- Department of Cancer Biology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Ping Huang
- Department of Cancer Biology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Paul W. Sanders
- Department of Nephrology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Eric Toline
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Richard A. Prayson
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Jeongwu Lee
- Department of Stem Cell and Regenerative Medicine, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Robert J.Weil
- Brain Tumor and Neuro-Oncology Center, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Cheryl A. Palmer
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - G. Yancey Gillespie
- Neurosurgery Division, Department of Surgery, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Wei Michael Liu
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Cancer Biology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Russell O. Pieper
- Department of Neurosurgery, University of California San Francisco, San Francisco, California, United States of America
| | - Jun-Lin Guan
- Division of Molecular Medicine and Genetics, Cell and Developmental Biology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Candece L. Gladson
- Division of Neuropathology, Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Cancer Biology, Cleveland Clinic, Cleveland, Ohio, United States of America
- Brain Tumor and Neuro-Oncology Center, Cleveland Clinic, Cleveland, Ohio, United States of America
- * E-mail:
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Liang CC, Wang C, Peng X, Gan B, Guan JL. Neural-specific deletion of FIP200 leads to cerebellar degeneration caused by increased neuronal death and axon degeneration. J Biol Chem 2010; 285:3499-509. [PMID: 19940130 PMCID: PMC2823459 DOI: 10.1074/jbc.m109.072389] [Citation(s) in RCA: 172] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Revised: 11/24/2009] [Indexed: 12/20/2022] Open
Abstract
FIP200 (FAK family-interacting protein of 200 kDa) is a conserved protein recently identified as a potential mammalian counterpart of yeast autophagy protein Atg17. However, it remains unknown whether mammalian FIP200 regulates autophagy in vivo. Here we show that neural-specific deletion of FIP200 resulted in cerebellar degeneration accompanied by progressive neuronal loss, spongiosis, and neurite degeneration in the cerebellum. Furthermore, deletion of FIP200 led to increased apoptosis in cerebellum as well as accumulation of ubiquitinated protein aggregates without any deficiency in proteasome catalytic functions. We also observed an increased p62/SQSTM1 accumulation in the cerebellum and reduced autophagosome formation as well as accumulation of damaged mitochondria in the mutant mice. Lastly, analysis of cerebellar neurons in vitro showed reduced JNK activation and increased susceptibility to serum deprivation-induced apoptosis in cerebellar neurons from the mutant mice. Taken together, these results provide strong genetic evidence for a role of FIP200 in the regulation of neuronal homeostasis through its function in autophagy in vivo.
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Affiliation(s)
- Chun-Chi Liang
- From the Divisions of Molecular Medicine and Genetics, Department of Internal Medicine, and
| | - Chenran Wang
- From the Divisions of Molecular Medicine and Genetics, Department of Internal Medicine, and
| | - Xu Peng
- From the Divisions of Molecular Medicine and Genetics, Department of Internal Medicine, and
| | - Boyi Gan
- From the Divisions of Molecular Medicine and Genetics, Department of Internal Medicine, and
| | - Jun-Lin Guan
- From the Divisions of Molecular Medicine and Genetics, Department of Internal Medicine, and
- the Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan 48109
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Paun BC, Cheng Y, Leggett BA, Young J, Meltzer SJ, Mori Y. Screening for microsatellite instability identifies frequent 3'-untranslated region mutation of the RB1-inducible coiled-coil 1 gene in colon tumors. PLoS One 2009; 4:e7715. [PMID: 19888451 PMCID: PMC2766054 DOI: 10.1371/journal.pone.0007715] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Accepted: 10/08/2009] [Indexed: 11/18/2022] Open
Abstract
Background Coding region microsatellite instability (MSI) results in loss of gene products and promotion of microsatellite-unstable (MSI-H) carcinogenesis. Recent studies have indicated that MSI within 3′-untranslated regions (3′UTRs) may post-transcriptionally dysregulate gene products. Within this context, we conducted a broad mutational survey of 42 short 3′UTR microsatellites (MSs) in 45 MSI-H colorectal tumors and their corresponding normal colonic mucosae. Methodology/Principal Findings In order to estimate the overall susceptibility of MSs to MSI in MSI-H tumors, the observed MSI frequency of each MS was correlated with its length, interspecies sequence conservation level, and distance from some genetic elements (i.e., stop codon, polyA signal, and microRNA binding sites). All MSs were stable in normal colonic mucosae. The MSI frequency at each MS in MSI-H tumors was independent of sequence conservation level and distance from other genetic elements. In contrast, MS length correlated significantly with MSI frequency in MSI-H tumors (r = 0.86, p = 7.2×10−13). 3′UTR MSs demonstrated MSI frequencies in MSI-H tumors higher than the 99% upper limit predicted by MS length for RB1-inducible coiled-coil 1(RB1CC1, mutation frequency 68.4%), NUAK family SNF1-like kinase 1(NUAK1, 31.0%), and Rtf1, Paf1/RNA polymerase II complex component, homolog (RTF1, 25.0%). An in silico prediction of RNA structure alterations was conducted for these MSI events to gauge their likelihood of affecting post-transcriptional regulation. RB1CC1 mutant was predicted to lose a microRNA-accessible loop structure at a putative binding site for the tumor-suppressive microRNA, miR-138. In contrast, the predicted 3′UTR structural change was minimal for NUAK1- and RTF1 mutants. Notably, real-time quantitative RT-PCR analysis revealed significant RB1CC1 mRNA overexpression vs. normal colonic mucosae in MSI-H cancers manifesting RB1CC1 3′UTR MSI (9.0-fold; p = 3.6×10−4). Conclusions This mutational survey of well-characterized short 3′UTR MSs confirms that MSI incidence in MSI-H colorectal tumors correlates with MS length, but not with sequence conservation level or distance from other genetic elements. This study also identifies RB1CC1 as a novel target of frequent mutation and aberrant upregulation in MSI-H colorectal tumors. The predicted loss of a microRNA-accessible structure in mutant RB1CC1 RNA fits the hypothesis that 3′UTR MSI involves in aberrant RB1CC1 posttranscriptional upregulation. Further direct assessments are indicated to investigate this possibility.
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Affiliation(s)
- Bogdan C. Paun
- Division of Gastroenterology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Yulan Cheng
- Division of Gastroenterology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Barbara A. Leggett
- Conjoint Gastroenterology Lab, Royal Brisbane Hospital Foundation, Clinical Research Centre, Bancroft Centre, Herston, Queensland, Australia
| | - Joanne Young
- Familial Cancer Laboratory, Queensland Institute of Medical Research, Herston, Queensland, Australia
| | - Stephen J. Meltzer
- Division of Gastroenterology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Division of Gastroenterology, Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Yuriko Mori
- Division of Gastroenterology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- * E-mail:
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