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Ma R, Xu X. Deciphering the role of post-translational modifications in fanconi anemia proteins and their influence on tumorigenesis. Cancer Gene Ther 2024; 31:1113-1123. [PMID: 38879655 DOI: 10.1038/s41417-024-00797-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/01/2024] [Accepted: 06/04/2024] [Indexed: 08/17/2024]
Abstract
Fanconi anemia (FA) is an autosomal or X-linked human disease, characterized by bone marrow failure, cancer susceptibility and various developmental abnormalities. So far, at least 22 FA genes (FANCA-W) have been identified. Germline inactivation of any one of these FA genes causes FA symptoms. Proteins encoded by FA genes are involved in the Fanconi anemia pathway, which is known for its roles in DNA inter-strand crosslinks (ICLs) repair. Besides, its roles in genome maintenance upon replication stress has also been reported. Post-translational modifications (PTMs) of FA proteins, particularly phosphorylation and ubiquitination, emerge as critical determinants in the activation of the FA pathway during ICL repair or replication stress response. Consequent inactivation of the FA pathway engenders heightened chromosomal instability, thereby constituting a genetic susceptibility conducive to cancer predisposition and the exacerbation of tumorigenesis. In this review, we have combined recent structural analysis of FA proteins and summarized knowledge on the functions of different PTMs in regulating FA pathways, and discuss potential contributions stemming from mutations at PTMs to the genesis and progression of tumorigenesis.
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Affiliation(s)
- Rui Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, Hubei, 430062, China
| | - Xinlin Xu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan, Hubei, 430062, China.
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2
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Law HCH, Noe D, Woods NT. Interactome Profiling of DNA Damage Response (DDR) Mediators with Immunoprecipitation-Mass Spectrometry. Methods Mol Biol 2023; 2701:185-197. [PMID: 37574483 DOI: 10.1007/978-1-0716-3373-1_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Immunoprecipitation-mass spectrometry (IP-MS) is a versatile tool to probe for global protein-protein interactions (PPIs) in biological samples. Such interactions coordinate complex biological processes, such as the DNA damage response (DDR). Induction of DNA damage activates signaling networks where posttranslational modifications cause PPI that facilitate DNA repair and cell cycle coordination. Protein interactome profiling of DDR sensors, transducers, and effectors has the potential to identify novel DDR mechanisms that could advance our understanding and treatment of diseases associated with DDR defects, such as cancer. The protocol described here is a routine PPI analysis procedure that can be performed on samples stimulated with DNA damage. All processes and reagents are optimized for maximum sensitivity on the interactome and minimal contamination for the mass spectrometer.
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Affiliation(s)
- Henry C-H Law
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
| | - Dragana Noe
- Mass Spectrometry and Proteomics Core Facility, University of Nebraska Medical Center, Omaha, NE, USA
- Current address: Precision Biomarker Laboratories, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Nicholas T Woods
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA.
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3
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Li W, Yu M, Zhang J, Huang J, Lin Z, Chen J, Jiang G, Lin X. High expression levels of FANCI correlate with worse prognosis and promote tumor growth of lung adenocarcinoma partly via suppression of M1 macrophages. Gene 2022; 851:147053. [DOI: 10.1016/j.gene.2022.147053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/12/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
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4
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Clement EJ, Law HCH, Qiao F, Noe D, Trevino JG, Woods NT. Combined Alcohol Exposure and KRAS Mutation in Human Pancreatic Ductal Epithelial Cells Induces Proliferation and Alters Subtype Signatures Determined by Multi-Omics Analysis. Cancers (Basel) 2022; 14:cancers14081968. [PMID: 35454872 PMCID: PMC9027648 DOI: 10.3390/cancers14081968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Pancreatic ductal adenocarcinoma is a deadly disease wherein alcohol use increases the risk of developing this cancer. Mutations in the KRAS oncogene are required for alcohol to promote pancreatic cancer in mice, but little is known about the molecular events associated with the combined exposure of alcohol and mutant KRAS expression in pancreas cells. In this study, we use pancreas cell models with and without mutant KRAS to evaluate the impact of chronic alcohol exposure on transcription and protein expression. This study identifies numerous differentially expressed transcripts and proteins that could influence the emergence of oncogenic features, such as increased proliferation, in pancreas cells. Abstract Pancreatic Ductal adenocarcinoma (PDAC) is an aggressive cancer commonly exhibiting KRAS-activating mutations. Alcohol contributes to the risk of developing PDAC in humans, and murine models have shown alcohol consumption in the context of KRAS mutation in the pancreas promotes the development of PDAC. The molecular signatures in pancreas cells altered by alcohol exposure in the context of mutant KRAS could identify pathways related to the etiology of PDAC. In this study, we evaluated the combined effects of alcohol exposure and KRAS mutation status on the transcriptome and proteome of pancreatic HPNE cell models. These analyses identified alterations in transcription and translational processes in mutant KRAS cells exposed to alcohol. In addition, multi-omics analysis suggests an increase in the correlation between mRNA transcript and protein abundance in cells exposed to alcohol with an underlying KRAS mutation. Through differential co-expression, SERPINE1 was found to be influential for PDAC development in the context of mutant KRAS and ethanol. In terms of PDAC subtypes, alcohol conditioning of HPNE cells expressing mutant KRAS decreases the Inflammatory subtype signature and increases the Proliferative and Metabolic signatures, as we previously observed in patient samples. The alterations in molecular subtypes were associated with an increased sensitivity to chemotherapeutic agents gemcitabine, irinotecan, and oxaliplatin. These results provide a framework for distinguishing the molecular dysregulation associated with combined alcohol and mutant KRAS in a pancreatic cell line model.
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Affiliation(s)
- Emalie J. Clement
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (E.J.C.); (H.C.-H.L.); (F.Q.)
| | - Henry C.-H. Law
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (E.J.C.); (H.C.-H.L.); (F.Q.)
| | - Fangfang Qiao
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (E.J.C.); (H.C.-H.L.); (F.Q.)
| | - Dragana Noe
- Mass Spectrometry and Proteomics Core Facility, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Jose G. Trevino
- Department of Surgery, Virginia Commonwealth University, Richmond, VA 23298, USA;
| | - Nicholas T. Woods
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA; (E.J.C.); (H.C.-H.L.); (F.Q.)
- Correspondence:
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5
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Richard IA, Burgess JT, O'Byrne KJ, Bolderson E. Beyond PARP1: The Potential of Other Members of the Poly (ADP-Ribose) Polymerase Family in DNA Repair and Cancer Therapeutics. Front Cell Dev Biol 2022; 9:801200. [PMID: 35096828 PMCID: PMC8795897 DOI: 10.3389/fcell.2021.801200] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/21/2021] [Indexed: 01/22/2023] Open
Abstract
The proteins within the Poly-ADP Ribose Polymerase (PARP) family encompass a diverse and integral set of cellular functions. PARP1 and PARP2 have been extensively studied for their roles in DNA repair and as targets for cancer therapeutics. Several PARP inhibitors (PARPi) have been approved for clinical use, however, while their efficacy is promising, tumours readily develop PARPi resistance. Many other members of the PARP protein family share catalytic domain homology with PARP1/2, however, these proteins are comparatively understudied, particularly in the context of DNA damage repair and tumourigenesis. This review explores the functions of PARP4,6-16 and discusses the current knowledge of the potential roles these proteins may play in DNA damage repair and as targets for cancer therapeutics.
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Affiliation(s)
- Iain A Richard
- Cancer and Ageing Research Program (CARP), Centre for Genomics and Personalised Health (CGPH), Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Joshua T Burgess
- Cancer and Ageing Research Program (CARP), Centre for Genomics and Personalised Health (CGPH), Queensland University of Technology (QUT), Brisbane, QLD, Australia
| | - Kenneth J O'Byrne
- Cancer and Ageing Research Program (CARP), Centre for Genomics and Personalised Health (CGPH), Queensland University of Technology (QUT), Brisbane, QLD, Australia.,Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Emma Bolderson
- Cancer and Ageing Research Program (CARP), Centre for Genomics and Personalised Health (CGPH), Queensland University of Technology (QUT), Brisbane, QLD, Australia
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6
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Ishiai M. Regulation of the Fanconi Anemia DNA Repair Pathway by Phosphorylation and Monoubiquitination. Genes (Basel) 2021; 12:genes12111763. [PMID: 34828369 PMCID: PMC8624177 DOI: 10.3390/genes12111763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/27/2021] [Accepted: 11/03/2021] [Indexed: 12/18/2022] Open
Abstract
The Fanconi anemia (FA) DNA repair pathway coordinates a faithful repair mechanism for stalled DNA replication forks caused by factors such as DNA interstrand crosslinks (ICLs) or replication stress. An important role of FA pathway activation is initiated by monoubiquitination of FANCD2 and its binding partner of FANCI, which is regulated by the ATM-related kinase, ATR. Therefore, regulation of the FA pathway is a good example of the contribution of ATR to genome stability. In this short review, we summarize the knowledge accumulated over the years regarding how the FA pathway is activated via phosphorylation and monoubiquitination.
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Affiliation(s)
- Masamichi Ishiai
- Central Radioisotope Division, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan
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7
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Bernardi A, Gobelli D, Serna J, Nawrocka P, March-Rosselló G, Orduña A, Kozlowski P, Simarro M, de la Fuente MA. Novel fluorescent-based reporter cell line engineered for monitoring homologous recombination events. PLoS One 2021; 16:e0237413. [PMID: 33930025 PMCID: PMC8087102 DOI: 10.1371/journal.pone.0237413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 04/13/2021] [Indexed: 12/19/2022] Open
Abstract
Homologous recombination (HR) faithfully restores DNA double-strand breaks. Defects in this HR repair pathway are associated with cancer predisposition. In genetic engineering, HR has been used extensively to study gene function and it represents an ideal method of gene therapy for single gene disorders. Here, we present a novel assay to measure HR in living cells. The HR substrate consisted of a non-fluorescent 3’ truncated form of the eGFP gene and was integrated into the AAVS1 locus, known as a safe harbor. The donor DNA template comprised a 5’ truncated eGFP copy and was delivered via AAV particles. HR mediated repair restored full-length eGFP coding sequence, resulting in eGFP+ cells. The utility of our assay in quantifying HR events was validated by exploring the impact of the overexpression of HR promoters and the siRNA-mediated silencing of genes known to play a role in DNA repair on the frequency of HR. We conclude that this novel assay represents a useful tool to further investigate the mechanisms that control HR and test continually emerging tools for HR-mediated genome editing.
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Affiliation(s)
- Alejandra Bernardi
- Institute of Biomedicine and Molecular Genetics (IBGM) of Valladolid, Valladolid, Spain
| | - Dino Gobelli
- Institute of Biomedicine and Molecular Genetics (IBGM) of Valladolid, Valladolid, Spain
| | - Julia Serna
- Institute of Biomedicine and Molecular Genetics (IBGM) of Valladolid, Valladolid, Spain
| | - Paulina Nawrocka
- Department of Molecular Genetics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | | | - Antonio Orduña
- Division of Microbiology, Hospital Clínico of Valladolid, Valladolid, Spain.,Microbiology Department, University of Valladolid, Valladolid, Spain
| | - Piotr Kozlowski
- Department of Molecular Genetics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - María Simarro
- Institute of Biomedicine and Molecular Genetics (IBGM) of Valladolid, Valladolid, Spain.,Department of Nursing-"Grupo de Investigación en Cuidados de Enfermería" GICE, University of Valladolid, Valladolid, Spain
| | - Miguel A de la Fuente
- Institute of Biomedicine and Molecular Genetics (IBGM) of Valladolid, Valladolid, Spain.,Department of Cell Biology, Histology and Pharmacology, University of Valladolid, Valladolid, Spain
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8
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Sun R, Li S, Zhao K, Diao M, Li L. Identification of Ten Core Hub Genes as Potential Biomarkers and Treatment Target for Hepatoblastoma. Front Oncol 2021; 11:591507. [PMID: 33868991 PMCID: PMC8047669 DOI: 10.3389/fonc.2021.591507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 02/25/2021] [Indexed: 12/15/2022] Open
Abstract
Background This study aimed to systematically investigate gene signatures for hepatoblastoma (HB) and identify potential biomarkers for its diagnosis and treatment. Materials and Methods GSE131329 and GSE81928 were obtained from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) between hepatoblastoma and normal samples were identified using the Limma package in R. Then, the similarity of network traits between two sets of genes was analyzed by weighted gene correlation network analysis (WGCNA). Cytoscape was used to visualize and select hub genes. PPI network of hub genes was construed by Cytoscape. GO enrichment and KEGG pathway analyses of hub genes were carried out using ClueGO. The random forest classifier was constructed based on the hub genes using the GSE131329 dataset as the training set, and its reliability was validated using the GSE81928 dataset. The resulting core hub genes were combined with the InnateDB database to identify the innate core genes. Results A total of 4244 DEGs in HB were identified. WGCNA identified four modules that were significantly correlated with the disease status. A total of 114 hub genes were obtained within the top 20 genes of each node rank. 6982 relation pairs and 3700 nodes were contained in the PPI network of 114 hub genes. GO enrichment and KEGG pathway analyses of hub genes were focused on MAPK, cell cycle, p53, and other crucial pathways involved in HB. A random forest classifier was constructed using the 114 hub genes as feature genes, resulting in a 95.5% true positive rate when classifying HB and normal samples. A total of 35 core hub genes were obtained through the mean decrease in accuracy and mean decrease Gini of the random forest model. The classification efficiency of the random forest model was 81.4%. Finally, CDK1, TOP2A, ADRA1A, FANCI, XRCC1, TPX2, CCNB2, CDK4, GLYATL1, and CFHR3 were identified by cross-comparison with the InnateDB database. Conclusion Our study established a random forest classifier that identified 10 core genes in HB. These findings may be beneficial for the diagnosis, prediction, and targeted therapy of HB.
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Affiliation(s)
- Rui Sun
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, China.,Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Simin Li
- Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Ke Zhao
- Department of Ophthalmology, Ningbo Hangzhou Bay Hospital, Ningbo, China
| | - Mei Diao
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, China
| | - Long Li
- Department of Pediatric Surgery, Capital Institute of Pediatrics, Beijing, China
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9
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Qiao F, Law HCH, Krieger KL, Clement EJ, Xiao Y, Buckley SM, Woods NT. Ctdp1 deficiency leads to early embryonic lethality in mice and defects in cell cycle progression in MEFs. Biol Open 2021; 10:10/1/bio057232. [PMID: 33408128 PMCID: PMC7803460 DOI: 10.1242/bio.057232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
RNA polymerase II subunit A Carboxy-Terminal Domain Phosphatase 1 (CTDP1), a member of the haloacid dehalogenase superfamily phosphatases, has a defined role in transcriptional regulation, but emerging evidence suggests an expanded functional repertoire in the cell cycle and DNA damage response. In humans, a splice site mutation in CTDP1 gives rise to the rare Congenital Cataracts Facial Dysmorphism and Neuropathy syndrome, and recent evidence from our lab indicates CTDP1 is required for breast cancer growth and proliferation. To explore the physiological function of CTDP1 in a mammalian system, we generated a conditional Ctdp1 knockout mouse model by insertion of loxP sites upstream of exon 3 and downstream of exon 4. Biallelic deletion of Ctdp1 results in lethality before embryonic day 7.5, with morphological features indicating embryo cell death and resorption. However, Ctdp1+/− mice are haplosufficient for phenotypic traits including body weight, hematological parameters, exploratory and locomotive functions. To investigate the potential mechanisms of the embryonic death caused by biallelic Ctdp1 knockout, mouse embryonic fibroblasts (MEFs) were established from Ctdp1+/+ and Ctdp1flox/flox mice. Lentivirus delivered Cre-mediated biallelic deletion of Ctdp1 in MEFs results in cell death preceded by impaired proliferation characterized by an increase in G1- and G2-phase populations and a reduction in the S-phase population. These cell cycle alterations caused by deletion of Ctdp1 are associated with an increase in p27 protein expression and a decrease in phosphorylated RB, phosphorylated Histone H3, and Cyclin B expression. Together, these results reveal that Ctdp1 plays an essential role in early mouse embryo development and cell growth and survival in part by regulating the cell cycle. Summary: Knockout of Ctdp1 reveals its essential role in mammalian embryogenesis and regulation of the cell cycle.
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Affiliation(s)
- Fangfang Qiao
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Henry C-H Law
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Kimiko L Krieger
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Emalie J Clement
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Yi Xiao
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Shannon M Buckley
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA.,Department of Genetics, Cell Biology, and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Nicholas T Woods
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffet Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
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10
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Cheng C, Wu X, Shen Y, Li Q. KIF14 and KIF23 Promote Cell Proliferation and Chemoresistance in HCC Cells, and Predict Worse Prognosis of Patients with HCC. Cancer Manag Res 2020; 12:13241-13257. [PMID: 33380832 PMCID: PMC7767722 DOI: 10.2147/cmar.s285367] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/30/2020] [Indexed: 12/11/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is one of the most common human malignant tumors. The prognosis of HCC patients is still unsatisfying. In this study, we performed the integrated bioinformatics analysis to identify potential biomarkers and biological pathways in HCC. Methods Gene expression profiles were obtained from the Gene Expression Omnibus database (GSE55048, GSE55758, and GSE56545) for the screening of the common differentially expressed genes (DEGs) between HCC tissues and matched non-tumor tissues. DEGs were subjected to Gene Ontology, KEGG pathway, and Reactome pathway analysis. The hub genes were identified by using protein–protein interaction (PPI) network analysis. The hub genes in HCC were further subjected to overall survival analysis of HCC patients. The hub genes were further validated by in vitro functional assays. Results A total of 544 common differentially expressed genes were screened from three datasets. Gene Ontology, KEGG and Reactome analysis results showed that DEGs are significantly associated with the biological process of cell cycle, cell division, and DNA replication. PPI network analysis identified 20 hub genes from the DEGs. These hub genes except CENPE were all significantly up-regulated in the HCC tissues when compared to non-tumor tissues. The Kaplan–Meier survival analysis results showed that the high expression of the 20 hub genes was associated with shorter survival of the HCC patients. Further validation studies showed that knockdown of KIF14 and KIF23 both suppressed the proliferative potential, increased the caspase-3/-7 activity, up-regulated Bax expression, and promoted the invasive and migratory abilities in the HCC cells. In addition, knockdown of KIF14 and KIF23 enhanced chemosensitivity to cisplatin and sorafenib in the HCC cells. Finally, the high expression of KIF14 and KIF23 was associated with shorter progression-free survival, recurrence-free survival, and disease-specific survival of patients with HCC. Conclusion In conclusion, the present study performed the integrated bioinformatics analysis and showed that KIF14 and KIF23 silence attenuated cell proliferation, invasion, and migration, and promoted chemosensitivity of HCC cells. KIF14 and KIF23 may serve as potential biomarkers for predicting the worse prognosis of patients with HCC.
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Affiliation(s)
- Chunxia Cheng
- Department of Hepatobiliary Surgery, The Second People's Hospital of Lianyungang, Liangyungang City 222023, People's Republic of China
| | - Xingxing Wu
- Deparment of Pediatric Surgery, The Second People's Hospital of Lianyungang, Liangyungang City 222023, People's Republic of China
| | - Yu Shen
- Department of Hepatobiliary Surgery, The Second People's Hospital of Lianyungang, Liangyungang City 222023, People's Republic of China
| | - Quanxi Li
- Department of Hepatobiliary Surgery, The Second People's Hospital of Lianyungang, Liangyungang City 222023, People's Republic of China
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11
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JMJD6 Regulates Splicing of Its Own Gene Resulting in Alternatively Spliced Isoforms with Different Nuclear Targets. Int J Mol Sci 2020; 21:ijms21186618. [PMID: 32927736 PMCID: PMC7555845 DOI: 10.3390/ijms21186618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022] Open
Abstract
Jumonji-domain-containing protein 6 (JMJD6) is a Fe(II) and 2-oxogluterate (2OG) dependent oxygenase involved in gene regulation through post-translationally modifying nuclear proteins. It is highly expressed in many cancer types and linked to tumor progression and metastasis. Four alternatively-spliced jmjd6 transcripts were annotated. Here, we focus on the two most abundantly expressed ones, which we call jmjd6-2 and jmjd6-Ex5. TCGA SpliceSeq data revealed a significant decrease of jmjd6-Ex5 transcripts in patients and postmortem tissue of several tumors. The two protein isoforms are distinguished by their C-terminal sequences, which include a serine-rich region (polyS-domain) in JMJD6-2 that is not present in JMJD6-Ex5. Immunoprecipitation followed by LC-MS/MS for JMJD6-Ex5 shows that different sets of proteins interact with JMJD6-2 and JMJD6-Ex5 with only a few overlaps. In particular, we found TFIIF-associating CTD phosphatase (FCP1), proteins of the survival of motor neurons (SMN) complex, heterogeneous nuclear ribonucleoproteins (hnRNPs) and upstream binding factor (UBF) to interact with JMJD6-Ex5. Like JMJD6-2, both UBF and FCP1 comprise a polyS-domain. The polyS domain of JMJD6-2 might block the interaction with polyS-domains of other proteins. In contrast, JMJD6-2 interacts with many SR-like proteins with arginine/serine-rich (RS)-domains, including several splicing factors. In an HIV-based splicing reporter assay, co-expression of JMJD6-2 inhibited exon inclusion, whereas JMJD6-Ex5 did not have any effect. Furthermore, the silencing of jmjd6 by siRNAs favored jmjd6-Ex5 transcripts, suggesting that JMJD6 controls splicing of its own pre-mRNA. The distinct molecular properties of JMJD6-2 and JMJD6-Ex5 open a lead into the functional implications of the variations of their relative abundance in tumors.
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12
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Tan W, van Twest S, Murphy VJ, Deans AJ. ATR-Mediated FANCI Phosphorylation Regulates Both Ubiquitination and Deubiquitination of FANCD2. Front Cell Dev Biol 2020; 8:2. [PMID: 32117957 PMCID: PMC7010609 DOI: 10.3389/fcell.2020.00002] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 01/03/2020] [Indexed: 01/02/2023] Open
Abstract
DNA interstrand crosslinks (ICLs) are a physical barrier to replication and therefore toxic to cell viability. An important mechanism for the removal of ICLs is the Fanconi Anemia DNA repair pathway, which is initiated by mono-ubiquitination of FANCD2 and its partner protein FANCI. Here, we show that maintenance of FANCD2 and FANCI proteins in a monoubiquitinated form is regulated by the ATR-kinase. Using recombinant proteins in biochemical reconstitution experiments we show that ATR directly phosphorylates FANCI on serine 556, 559, and 565 to stabilize its association with DNA and FANCD2. This increased association with DNA stimulates the conjugation of ubiquitin to both FANCI and FANCD2, but also inhibits ubiquitin deconjugation. Using phosphomimetic and phosphodead mutants of FANCI we show that S559 and S565 are particularly important for protecting the complex from the activity of the deubiquitinating enzyme USP1:UAF1. Our results reveal a major mechanism by which ATR kinase maintains the activation of the FA pathway, by promoting the accumulation of FANCD2 in the ubiquitinated form active in DNA repair.
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Affiliation(s)
- Winnie Tan
- Genome Stability Unit, St Vincent’s Institute of Medical Research, Fitzroy, VIC, Australia
- Department of Medicine (St Vincent’s Hospital), The University of Melbourne, Melbourne, VIC, Australia
| | - Sylvie van Twest
- Genome Stability Unit, St Vincent’s Institute of Medical Research, Fitzroy, VIC, Australia
| | - Vincent J. Murphy
- Genome Stability Unit, St Vincent’s Institute of Medical Research, Fitzroy, VIC, Australia
| | - Andrew J. Deans
- Genome Stability Unit, St Vincent’s Institute of Medical Research, Fitzroy, VIC, Australia
- Department of Medicine (St Vincent’s Hospital), The University of Melbourne, Melbourne, VIC, Australia
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13
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Law HCH, Lagundžin D, Clement EJ, Qiao F, Wagner ZS, Krieger KL, Costanzo-Garvey D, Caffrey TC, Grem JL, DiMaio DJ, Grandgenett PM, Cook LM, Fisher KW, Yu F, Hollingsworth MA, Woods NT. The Proteomic Landscape of Pancreatic Ductal Adenocarcinoma Liver Metastases Identifies Molecular Subtypes and Associations with Clinical Response. Clin Cancer Res 2019; 26:1065-1076. [PMID: 31848187 DOI: 10.1158/1078-0432.ccr-19-1496] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 10/19/2019] [Accepted: 12/11/2019] [Indexed: 12/16/2022]
Abstract
PURPOSE Pancreatic ductal adenocarcinoma (PDAC) is a highly metastatic disease that can be separated into distinct subtypes based on molecular signatures. Identifying PDAC subtype-specific therapeutic vulnerabilities is necessary to develop precision medicine approaches to treat PDAC. EXPERIMENTAL DESIGN A total of 56 PDAC liver metastases were obtained from the UNMC Rapid Autopsy Program and analyzed with quantitative proteomics. PDAC subtypes were identified by principal component analysis based on protein expression profiling. Proteomic subtypes were further characterized by the associated clinical information, including but not limited to survival analysis, drug treatment response, and smoking and drinking status. RESULTS Over 3,960 proteins were identified and used to delineate four distinct PDAC microenvironment subtypes: (i) metabolic; (ii) progenitor-like; (iii) proliferative; and (iv) inflammatory. PDAC risk factors of alcohol and tobacco consumption correlate with subtype classifications. Enhanced survival is observed in FOLFIRINOX treated metabolic and progenitor-like subtypes compared with the proliferative and inflammatory subtypes. In addition, TYMP, PDCD6IP, ERAP1, and STMN showed significant association with patient survival in a subtype-specific manner. Gemcitabine-induced alterations in the proteome identify proteins, such as serine hydroxymethyltransferase 1, associated with drug resistance. CONCLUSIONS These data demonstrate that proteomic analysis of clinical PDAC liver metastases can identify molecular signatures unique to disease subtypes and point to opportunities for therapeutic development to improve the treatment of PDAC.
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Affiliation(s)
- Henry C-H Law
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Dragana Lagundžin
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Emalie J Clement
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Fangfang Qiao
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Zachary S Wagner
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Kimiko L Krieger
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Diane Costanzo-Garvey
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha Nebraska
| | - Thomas C Caffrey
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Jean L Grem
- Internal Medicine, Division of Hematology Oncology, University of Nebraska Medical Center, Omaha Nebraska
| | - Dominick J DiMaio
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha Nebraska
| | - Paul M Grandgenett
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Leah M Cook
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha Nebraska
| | - Kurt W Fisher
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha Nebraska
| | - Fang Yu
- Department of Biostatistics, College of Public Health, University of Nebraska Medical Center, Omaha Nebraska
| | - Michael A Hollingsworth
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Nicholas T Woods
- Eppley Institute for Research in Cancer, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska.
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14
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Lagundžin D, Hu WF, Law HCH, Krieger KL, Qiao F, Clement EJ, Drincic AT, Nedić O, Naldrett MJ, Alvarez S, Woods NT. Delineating the role of FANCA in glucose-stimulated insulin secretion in β cells through its protein interactome. PLoS One 2019; 14:e0220568. [PMID: 31461451 PMCID: PMC6713327 DOI: 10.1371/journal.pone.0220568] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/18/2019] [Indexed: 12/31/2022] Open
Abstract
Hyperinsulinemia affects 72% of Fanconi anemia (FA) patients and an additional 25% experience lowered glucose tolerance or frank diabetes. The underlying molecular mechanisms contributing to the dysfunction of FA pancreas β cells is unknown. Therefore, we sought to evaluate the functional role of FANCA, the most commonly mutated gene in FA, in glucose-stimulated insulin secretion (GSIS). This study reveals that FANCA or FANCB knockdown impairs GSIS in human pancreas β cell line EndoC-βH3. To identify potential pathways by which FANCA might regulate GSIS, we employed a proteomics approach to identify FANCA protein interactions in EndoC-βH3 differentially regulated in response to elevated glucose levels. Glucose-dependent changes in the FANCA interaction network were observed, including increased association with other FA family proteins, suggesting an activation of the DNA damage response in response to elevated glucose levels. Reactive oxygen species increase in response to glucose stimulation and are necessary for GSIS in EndoC-βH3 cells. Glucose-induced activation of the DNA damage response was also observed as an increase in the DNA damage foci marker γ-H2AX and dependent upon the presence of reactive oxygen species. These results illuminate the role of FANCA in GSIS and its protein interactions regulated by glucose stimulation that may explain the prevalence of β cell-specific endocrinopathies in FA patients.
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Affiliation(s)
- Dragana Lagundžin
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Mass Spectrometry and Proteomics Core Facility, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Wen-Feng Hu
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Henry C. H. Law
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Kimiko L. Krieger
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Fangfang Qiao
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Emalie J. Clement
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Andjela T. Drincic
- Department of Internal Medicine: Diabetes, Endocrinology and Metabolism, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Olgica Nedić
- Institute for the Application of Nuclear Energy, University of Belgrade, Banatska, Belgrade, Serbia
| | - Michael J. Naldrett
- Proteomics & Metabolomics Facility, Nebraska Center for Biotechnology, University of Nebraska–Lincoln, Nebraska, United States of America
| | - Sophie Alvarez
- Proteomics & Metabolomics Facility, Nebraska Center for Biotechnology, University of Nebraska–Lincoln, Nebraska, United States of America
| | - Nicholas T. Woods
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail:
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