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Chen R, Xie Y, Chang Z, Hu W, Han Z. Integration of single-cell sequencing with machine learning and Mendelian randomization analysis identifies the NAP1L1 gene as a predictive biomarker for Alzheimer's disease. Front Aging Neurosci 2024; 16:1406160. [PMID: 38988327 PMCID: PMC11233722 DOI: 10.3389/fnagi.2024.1406160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 05/31/2024] [Indexed: 07/12/2024] Open
Abstract
Background The most effective approach to managing Alzheimer's disease (AD) lies in identifying reliable biomarkers for AD to forecast the disease in advance, followed by timely early intervention for patients. Methods Transcriptomic data on peripheral blood mononuclear cells (PBMCs) from patients with AD and the control group were collected, and preliminary data processing was completed using standardized analytical methods. PBMCs were initially segmented into distinct subpopulations, and the divisions were progressively refined until the most significantly altered cell populations were identified. A combination of high-dimensional weighted gene co-expression analysis (hdWGCNA), cellular communication, pseudotime analysis, and single-cell regulatory network inference and clustering (SCENIC) analysis was used to conduct single-cell transcriptomics analysis and identify key gene modules from them. Genes were screened using machine learning (ML) in the key gene modules, and internal and external dataset validations were performed using multiple ML methods to test predictive performance. Finally, bidirectional Mendelian randomization (MR) analysis, regional linkage analysis, and the Steiger test were employed to analyze the key gene. Result A significant decrease in non-classical monocytes was detected in PMBC of AD patients. Subsequent analyses revealed the inherent connection of non-classical monocytes to AD, and the NAP1L1 gene identified within its gene module appeared to exhibit some association with AD as well. Conclusion The NAP1L1 gene is a potential predictive biomarker for AD.
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Affiliation(s)
- Runming Chen
- Department of Neurology, Beijing University of Chinese Medicine Shenzhen Hospital (Longgang), Shenzhen, China
| | - Yujun Xie
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Ze Chang
- Xiyuan Hospital, China Academy of Traditional Chinese Medicine, Beijing, China
| | - Wenyue Hu
- Department of Neurology, Beijing University of Chinese Medicine Shenzhen Hospital (Longgang), Shenzhen, China
| | - Zhenyun Han
- Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
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Gong J, Han G, Chen Z, Zhang Y, Xu B, Xu C, Gao W, Wu J. CircDCAF8 promotes the progression of hepatocellular carcinoma through miR-217/NAP1L1 Axis, and induces angiogenesis and regorafenib resistance via exosome-mediated transfer. J Transl Med 2024; 22:517. [PMID: 38816735 PMCID: PMC11137954 DOI: 10.1186/s12967-024-05233-4] [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: 02/21/2024] [Accepted: 04/23/2024] [Indexed: 06/01/2024] Open
Abstract
BACKGROUND Circular RNAs (circRNAs), which are a new type of single-stranded circular RNA, have significant involvement in progression of many diseases, including tumors. Currently, multiple circRNAs have been identified in hepatocellular carcinoma (HCC). Our study aims to investigate the function and mechanism of circDCAF8 in HCC. METHODS The expression of circDCAF8 (hsa_circ_0014879) in HCC and para-carcinoma tissue samples was determined using quantitative real-time polymerase chain reaction (qRT-PCR). The biological function of circDCAF8 in HCC was confirmed by experiments conducted both in vitro and in vivo. And the relationship between circDCAF8, miR-217 and NAP1L1 was predicted by database and verified using qRT-PCR, RNA-binding protein immunoprecipitation (RIP) and dual-luciferase reporter assays. Exosomes isolated from HCC cells were utilized to assess the connection of exosomal circDCAF8 with HCC angiogenesis and regorafenib resistance. RESULTS CircDCAF8 is upregulated in HCC tissues and cell lines, and is linked to an unfavourable prognosis for HCC patients. Functionally, circDCAF8 was proved to facilitate proliferation, migration, invasion and Epithelial-Mesenchymal Transformation (EMT) in HCC cells. Animal examinations also validated the tumor-promoting characteristics of circDCAF8 on HCC. Besides, exosomal circDCAF8 promoted angiogenesis in HUVECs. Mechanistically, circDCAF8 interacted with miR-217 and NAP1L1 was a downstream protein of miR-217. CircDCAF8 promoted NAP1L1 expression by sponging miR-217. In addition, exosomes may transfer circDCAF8 from regorafenib-resistant HCC cells to sensitive cells, where it would confer a resistant phenotype. CONCLUSION CircDCAF8 facilitates HCC proliferation and metastasis via the miR-217/NAP1L1 axis. Meanwhile, circDCAF8 can promote angiogenesis and drive resistance to regorafenib, making it a viable therapeutic target for HCC patients.
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MESH Headings
- Humans
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/pathology
- Carcinoma, Hepatocellular/metabolism
- MicroRNAs/genetics
- MicroRNAs/metabolism
- Liver Neoplasms/genetics
- Liver Neoplasms/pathology
- Liver Neoplasms/metabolism
- Exosomes/metabolism
- RNA, Circular/genetics
- RNA, Circular/metabolism
- Drug Resistance, Neoplasm/genetics
- Neovascularization, Pathologic/genetics
- Disease Progression
- Animals
- Phenylurea Compounds/pharmacology
- Phenylurea Compounds/therapeutic use
- Cell Line, Tumor
- Pyridines/pharmacology
- Mice, Nude
- Gene Expression Regulation, Neoplastic
- Male
- Cell Proliferation/drug effects
- Cell Proliferation/genetics
- Mice
- Mice, Inbred BALB C
- Female
- Base Sequence
- Human Umbilical Vein Endothelial Cells/metabolism
- Middle Aged
- Angiogenesis
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Affiliation(s)
- Jiahao Gong
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China
| | - Guoyong Han
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China
| | - Zhiqiang Chen
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China
| | - Yinqi Zhang
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China
| | - Bin Xu
- Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, Shandong Province, China
| | - Chao Xu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China
| | - Wen Gao
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
| | - Jindao Wu
- Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China.
- Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Hepatobiliary Cancers, Nanjing, Jiangsu Province, China.
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Peng N, Zhang Y, Zhang X, Wu HY, Nakamura F. NAP1L1 is a novel microtubule-associated protein. Cytoskeleton (Hoboken) 2023; 80:382-392. [PMID: 37098731 DOI: 10.1002/cm.21761] [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: 12/22/2022] [Revised: 03/29/2023] [Accepted: 04/16/2023] [Indexed: 04/27/2023]
Abstract
Microtubule-associated proteins (MAPs) regulate assembly and stability of microtubules (MTs) during cell cytokinesis, cell migration, neuronal growth, axon guidance, and synapse formation. Using data mining of the Human Protein Atlas database and experimental screening, we identified nucleosome assembly protein 1 like 1 (NAP1L1) as a new MAP. The Human Protein Atlas and PubMed database screening identified 99 potential new MAPs. Twenty candidate proteins that highly co-localized with MTs were exogenously expressed with green fluorescent protein (GFP) or hemagglutinin (HA) tags in tissue culture cells and MTs were co-stained for immunofluorescent microscopy. We found that NAP1L1 is mainly localized in the cytosol with MTs during interphase. Using bacterially expressed recombinant NAP1L1 fragments and purified MTs, we biochemically mapped the MT-binding site on the N-terminal region (1-72aa) and the central region (164-269aa) of NAP1L1. NAP1L1 dimerizes through the long helix region (73-163aa), and full-length NAP1L1 induces the formation of thick MTs, indicating that NAP1L1 has the ability to bundle MTs in cells. Analysis of publicly available RNA-seq data of NAP1L1 depleted cells suggested that NAP1L1 is involved in cell adhesion and migration in agreement with the function of NAP1L1 as a MAP.
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Affiliation(s)
- Nannan Peng
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Yang Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Xinyue Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Hui-Yuan Wu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Fumihiko Nakamura
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
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Huang PS, Wang LY, Wang YW, Tsai MM, Lin TK, Liao CJ, Yeh CT, Lin KH. Evaluation and Application of Drug Resistance by Biomarkers in the Clinical Treatment of Liver Cancer. Cells 2023; 12:cells12060869. [PMID: 36980210 PMCID: PMC10047572 DOI: 10.3390/cells12060869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/13/2023] [Accepted: 03/06/2023] [Indexed: 03/14/2023] Open
Abstract
Liver cancer is one of the most lethal cancers in the world, mainly owing to the lack of effective means for early monitoring and treatment. Accordingly, there is considerable research interest in various clinically applicable methods for addressing these unmet needs. At present, the most commonly used biomarker for the early diagnosis of liver cancer is alpha-fetoprotein (AFP), but AFP is sensitive to interference from other factors and cannot really be used as the basis for determining liver cancer. Treatment options in addition to liver surgery (resection, transplantation) include radiation therapy, chemotherapy, and targeted therapy. However, even more expensive targeted drug therapies have a limited impact on the clinical outcome of liver cancer. One of the big reasons is the rapid emergence of drug resistance. Therefore, in addition to finding effective biomarkers for early diagnosis, an important focus of current discussions is on how to effectively adjust and select drug strategies and guidelines for the treatment of liver cancer patients. In this review, we bring this thought process to the drug resistance problem faced by different treatment strategies, approaching it from the perspective of gene expression and molecular biology and the possibility of finding effective solutions.
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Affiliation(s)
- Po-Shuan Huang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (P.-S.H.); (C.-J.L.)
| | - Ling-Yu Wang
- Department of Biochemistry and Molecular Biology, Chang Gung University, Taoyuan 333, Taiwan;
- Division of Hematology-Oncology, Chang Gung Memorial Hospital at Linkou, Taoyuan 333, Taiwan
| | - Yi-Wen Wang
- School of Nursing, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan;
| | - Ming-Ming Tsai
- Department of Nursing, Division of Basic Medical Sciences, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan;
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
- Department of General Surgery, New Taipei Municipal Tu Cheng Hospital, New Taipei 236, Taiwan
| | - Tzu-Kang Lin
- Neurosurgery, School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City 24205, Taiwan;
- Neurosurgery, Department of Surgery, Fu Jen Catholic University Hospital, New Taipei City 24352, Taiwan
| | - Chia-Jung Liao
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (P.-S.H.); (C.-J.L.)
| | - Chau-Ting Yeh
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan;
| | - Kwang-Huei Lin
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan; (P.-S.H.); (C.-J.L.)
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan;
- Correspondence: ; Tel./Fax: +886-3-2118263
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Freitag M, Schwertz H. A New Role of NAP1L1 in Megakaryocytes and Human Platelets. Int J Mol Sci 2022; 23:ijms232314694. [PMID: 36499021 PMCID: PMC9737020 DOI: 10.3390/ijms232314694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/26/2022] Open
Abstract
Platelets (PLTs) are anucleate and considered incapable of nuclear functions. Contrastingly, nuclear proteins were detected in human PLTs. For most of these proteins, it is unclear if nuclear or alternatively assigned functions are performed, a question we wanted to address for nuclear assembly protein 1like 1 (NAP1L1). Using a wide array of molecular methods, including RNAseq, co-IP, overexpression and functional assays, we explored expression pattern and functionality of NAP1L1 in PLTs, and CD34+-derived megakaryocytes (MKs). NAP1L1 is expressed in PLTs and MKs. Co-IP experiments revealed that dihydrolipolylysine-residue acetyltransferase (DLAT encoded protein PDC-E2, ODP2) dynamically interacts with NAP1L1. PDC-E2 is part of the mitochondrial pyruvate-dehydrogenase (PDH) multi-enzyme complex, playing a crucial role in maintaining cellular respiration, and promoting ATP-synthesis via the respiratory chain. Since altered mitochondrial function is a hallmark of infectious syndromes, we analyzed PDH activity in PLTs from septic patients demonstrating increased activity, paralleling NAP1L1 expression levels. MKs PDH activity decreased following an LPS-challenge. Furthermore, overexpression of NAP1L1 significantly altered the ability of MKs to form proplatelet extensions, diminishing thrombopoiesis. These results indicate that NAP1L1 performs in other than nucleosome-assembly functions in PTLs and MKs, binding a key mitochondrial protein as a potential chaperone, and gatekeeper, influencing PDH activity and thrombopoiesis.
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Affiliation(s)
- Martin Freitag
- Department of Cardiac Surgery, Heart Center Leipzig-University Hospital, 04289 Leipzig, Germany
| | - Hansjörg Schwertz
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
- Division of Occupational Medicine, University of Utah, Salt Lake City, UT 84112, USA
- Occupational Medicine at Billings Clinic Bozeman, Bozeman, MT 59715, USA
- Correspondence: or
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