1
|
Cheng Y, Wang S, Zhang H, Lee JS, Ni C, Guo J, Chen E, Wang S, Acharya A, Chang TC, Buszczak M, Zhu H, Mendell JT. A non-canonical role for a small nucleolar RNA in ribosome biogenesis and senescence. Cell 2024; 187:4770-4789.e23. [PMID: 38981482 PMCID: PMC11344685 DOI: 10.1016/j.cell.2024.06.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 02/20/2024] [Accepted: 06/12/2024] [Indexed: 07/11/2024]
Abstract
Cellular senescence is an irreversible state of cell-cycle arrest induced by various stresses, including aberrant oncogene activation, telomere shortening, and DNA damage. Through a genome-wide screen, we discovered a conserved small nucleolar RNA (snoRNA), SNORA13, that is required for multiple forms of senescence in human cells and mice. Although SNORA13 guides the pseudouridylation of a conserved nucleotide in the ribosomal decoding center, loss of this snoRNA minimally impacts translation. Instead, we found that SNORA13 negatively regulates ribosome biogenesis. Senescence-inducing stress perturbs ribosome biogenesis, resulting in the accumulation of free ribosomal proteins (RPs) that trigger p53 activation. SNORA13 interacts directly with RPL23, decreasing its incorporation into maturing 60S subunits and, consequently, increasing the pool of free RPs, thereby promoting p53-mediated senescence. Thus, SNORA13 regulates ribosome biogenesis and the p53 pathway through a non-canonical mechanism distinct from its role in guiding RNA modification. These findings expand our understanding of snoRNA functions and their roles in cellular signaling.
Collapse
Affiliation(s)
- Yujing Cheng
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Siwen Wang
- Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, Guangdong, China; National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, Guangdong, China
| | - He Zhang
- Quantitative Biomedical Research Center, Peter O'Donnell Jr. School of Public Health, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jong-Sun Lee
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chunyang Ni
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jason Guo
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Eric Chen
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Shenming Wang
- Division of Vascular Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, Guangdong, China; National-Guangdong Joint Engineering Laboratory for Diagnosis and Treatment of Vascular Diseases, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, Guangdong, China
| | - Asha Acharya
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Tsung-Cheng Chang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Michael Buszczak
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hao Zhu
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Joshua T Mendell
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| |
Collapse
|
2
|
Ryu S, Nakashima H, Tanaka Y, Mukai R, Ishihara Y, Tominaga T, Ohshima T. Ribosomal Protein S4 X-Linked as a Novel Modulator of MDM2 Stability by Suppressing MDM2 Auto-Ubiquitination and SCF Complex-Mediated Ubiquitination. Biomolecules 2024; 14:885. [PMID: 39199272 PMCID: PMC11351588 DOI: 10.3390/biom14080885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/19/2024] [Accepted: 07/20/2024] [Indexed: 09/01/2024] Open
Abstract
Mouse double minute 2 (MDM2) is an oncoprotein that is frequently overexpressed in tumors and enhances cellular transformation. Owing to the important role of MDM2 in modulating p53 function, it is crucial to understand the mechanism underlying the regulation of MDM2 levels. We identified ribosomal protein S4X-linked (RPS4X) as a novel binding partner of MDM2 and showed that RPS4X promotes MDM2 stability. RPS4X suppressed polyubiquitination of MDM2 by suppressing homodimer formation and preventing auto-ubiquitination. Moreover, RPS4X inhibited the interaction between MDM2 and Cullin1, a scaffold protein of the Skp1-Cullin1-F-box protein (SCF) complex and an E3 ubiquitin ligase for MDM2. RPS4X expression in cells enhanced the steady-state level of MDM2 protein. RPS4X was associated not only with MDM2 but also with Cullin1 and then blocked the MDM2/Cullin1 interaction. This is the first report of an interaction between ribosomal proteins (RPs) and Cullin1. Our results contribute to the elucidation of the MDM2 stabilization mechanism in cancer cells, expanding our understanding of the new functions of RPs.
Collapse
Affiliation(s)
- Satsuki Ryu
- Faculty of Pharmaceutical Science at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan; (S.R.); (H.N.); (T.T.)
| | - Hiroki Nakashima
- Faculty of Pharmaceutical Science at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan; (S.R.); (H.N.); (T.T.)
| | - Yuka Tanaka
- Faculty of Science and Engineering, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan;
| | - Risa Mukai
- Department of Cell Biology and Molecular Medicine, Rutgers New Jersey Medical School, Newark, NJ 07101-1709, USA;
| | - Yasuhiro Ishihara
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima 739-8521, Japan;
| | - Takashi Tominaga
- Faculty of Pharmaceutical Science at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan; (S.R.); (H.N.); (T.T.)
| | - Takayuki Ohshima
- Faculty of Pharmaceutical Science at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan; (S.R.); (H.N.); (T.T.)
- Faculty of Science and Engineering, Tokushima Bunri University, 1314-1 Shido, Sanuki 769-2193, Japan;
| |
Collapse
|
3
|
Wu H, Yang Y, Yi W, Qiu Y, Ma S, Xu J, Fan Y, Chen Y, Chen Y. Coronin 2B deficiency induces nucleolar stress and neuronal apoptosis. Cell Death Dis 2024; 15:457. [PMID: 38937439 PMCID: PMC11211331 DOI: 10.1038/s41419-024-06852-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 06/29/2024]
Abstract
In eukaryotes, the nucleolus is the critical non-membranous organelle within nuclei that is responsible for ribosomal DNA (rDNA) transcription and ribosome biogenesis. The transcription of rDNA, a rate-limiting step for ribosome biogenesis, is tightly regulated to meet the demand for global protein synthesis in response to cell physiology, especially in neurons, which undergo rapid changes in morphology and protein composition during development and synaptic plasticity. However, it is unknown how the pre-initiation complex for rDNA transcription is efficiently assembled within the nucleolus in neurons. Here, we report that the nucleolar protein, coronin 2B, regulates rDNA transcription and maintains nucleolar function through direct interaction with upstream binding factor (UBF), an activator of RNA polymerase I transcriptional machinery. We show that coronin 2B knockdown impairs the formation of the transcription initiation complex, inhibits rDNA transcription, destroys nucleolar integrity, and ultimately induces nucleolar stress. In turn, coronin 2B-mediated nucleolar stress leads to p53 stabilization and activation, eventually resulting in neuronal apoptosis. Thus, we identified that coronin 2B coordinates with UBF to regulate rDNA transcription and maintain proper nucleolar function in neurons.
Collapse
Affiliation(s)
- Hongjiao Wu
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China
| | - Yujie Yang
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China
- University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Wanying Yi
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, 518057, China
| | - Yue Qiu
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, 518057, China
| | - Shuangshuang Ma
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, 518057, China
| | - Jinying Xu
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China
| | - Yingying Fan
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China
| | - Yuewen Chen
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China.
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China.
- University of the Chinese Academy of Sciences, Beijing, 100049, China.
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, 518057, China.
| | - Yu Chen
- Chinese Academy of Sciences Key Laboratory of Brain Connectome and Manipulation, Shenzhen Key Laboratory of Translational Research for Brain Diseases, The Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, ; Shenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research Institutions, Shenzhen, Guangdong, 518055, China.
- SIAT-HKUST Joint Laboratory for Brain Science, Chinese Academy of Sciences, Shenzhen, China.
- University of the Chinese Academy of Sciences, Beijing, 100049, China.
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, 518057, China.
| |
Collapse
|
4
|
González-Arzola K. The nucleolus: Coordinating stress response and genomic stability. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2024; 1867:195029. [PMID: 38642633 DOI: 10.1016/j.bbagrm.2024.195029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 03/25/2024] [Accepted: 04/12/2024] [Indexed: 04/22/2024]
Abstract
The perception that the nucleoli are merely the organelles where ribosome biogenesis occurs is challenged. Only around 30 % of nucleolar proteins are solely involved in producing ribosomes. Instead, the nucleolus plays a critical role in controlling protein trafficking during stress and, according to its dynamic nature, undergoes continuous protein exchange with nucleoplasm under various cellular stressors. Hence, the concept of nucleolar stress has evolved as cellular insults that disrupt the structure and function of the nucleolus. Considering the emerging role of this organelle in DNA repair and the fact that rDNAs are the most fragile genomic loci, therapies targeting the nucleoli are increasingly being developed. Besides, drugs that target ribosome synthesis and induce nucleolar stress can be used in cancer therapy. In contrast, agents that regulate nucleolar activity may be a potential treatment for neurodegeneration caused by abnormal protein accumulation in the nucleolus. Here, I explore the roles of nucleoli beyond their ribosomal functions, highlighting the factors triggering nucleolar stress and their impact on genomic stability.
Collapse
Affiliation(s)
- Katiuska González-Arzola
- Centro Andaluz de Biología Molecular y Medicina Regenerativa (CABIMER), Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Junta de Andalucía, Universidad Pablo de Olavide, 41092 Seville, Spain; Departamento de Bioquímica Vegetal y Biología Molecular, Universidad de Sevilla, 41012 Seville, Spain.
| |
Collapse
|
5
|
Setiadi A, Singh C, Li A, Au N, Amid A. Monolobated megakaryocytes in Diamond-Blackfan anemia with RPL5 mutation at disease presentation mimicking myelodysplastic syndrome. Pediatr Blood Cancer 2024; 71:e30771. [PMID: 37988264 DOI: 10.1002/pbc.30771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/23/2023]
Affiliation(s)
- Audi Setiadi
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Pathology and Laboratory Medicine, Division of Hematopathology, BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Claudia Singh
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Amanda Li
- Division of Hematology & Oncology, BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Nicholas Au
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Pathology and Laboratory Medicine, Division of Hematopathology, BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Ali Amid
- Division of Hematology & Oncology, BC Children's Hospital, Vancouver, British Columbia, Canada
| |
Collapse
|
6
|
Lu H, Tan Z, Ko H, Naji P, Zhu R, Wang J, Huang S, Zhang YW, Zeng S. Tripartite motif-containing protein 26 promotes colorectal cancer growth by inactivating p53. RESEARCH SQUARE 2024:rs.3.rs-3782833. [PMID: 38260302 PMCID: PMC10802717 DOI: 10.21203/rs.3.rs-3782833/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Tripartite motif-containing protein 26 (TRIM26) is an E3 ubiquitin ligase that exhibits divergent roles in various cancer types (oncogenic and anti-oncogenic). This study investigates the interaction of TRIM26 with the tumor suppressor protein p53 in colorectal cancer (CRC) cells by performing a comprehensive set of biochemical, cell-based assays, and xenograft experiments. As a result, we found that overexpression of TRIM26 significantly enhances CRC cell proliferation and colony formation, while knockdown of TRIM26 suppresses these processes. Xenograft experiments further validated the tumor-promoting role of TRIM26 in CRC. Supporting this is that TRIM26 is highly expressed in human CRC tissues as revealed by our analysis of the TCGA database. Biochemically, TRIM26 directly bound to the C-terminus of p53 and facilitated its ubiquitination, resulting in proteolytic degradation and attenuated p53 activity independently of MDM2. Also, TRIM26 increased the MDM2-mediated ubiquitination of p53 by binding to MDM2's C-terminus. This study uncovers the oncogenic potential of TRIM26 in CRC by inhibiting p53 function. Through its ubiquitin ligase activity, TRIM26 destabilizes p53, consequently promoting CRC cell proliferation and tumor growth. These findings shed light on the complex involvement of TRIM26 in cancer and identify this ubiquitin ligase as a potential therapeutic target for future development of CRC treatment.
Collapse
|
7
|
Huang Y, Xiong C, Wang C, Deng J, Zuo Z, Wu H, Xiong J, Wu X, Lu H, Hao Q, Zhou X. p53-responsive CMBL reprograms glucose metabolism and suppresses cancer development by destabilizing phosphofructokinase PFKP. Cell Rep 2023; 42:113426. [PMID: 37967006 DOI: 10.1016/j.celrep.2023.113426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 09/25/2023] [Accepted: 10/27/2023] [Indexed: 11/17/2023] Open
Abstract
Aerobic glycolysis is critical for cancer progression and can be exploited in cancer therapy. Here, we report that the human carboxymethylenebutenolidase homolog (carboxymethylenebutenolidase-like [CMBL]) acts as a tumor suppressor by reprogramming glycolysis in colorectal cancer (CRC). The anti-cancer action of CMBL is mediated through its interactions with the E3 ubiquitin ligase TRIM25 and the glycolytic enzyme phosphofructokinase-1 platelet type (PFKP). Ectopic CMBL enhances TRIM25 binding to PFKP, leading to the ubiquitination and proteasomal degradation of PFKP. Interestingly, CMBL is transcriptionally activated by p53 in response to genotoxic stress, and p53 activation represses glycolysis by promoting PFKP degradation. Remarkably, CMBL deficiency, which impairs p53's ability to inhibit glycolysis, makes tumors more sensitive to a combination therapy involving the glycolysis inhibitor 2-deoxyglucose. Taken together, our study demonstrates that CMBL suppresses CRC growth by inhibiting glycolysis and suggests a potential combination strategy for the treatment of CMBL-deficient CRC.
Collapse
Affiliation(s)
- Yingdan Huang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Lymphoma Medicine (Breast Cancer & Soft Tissue Tumor Medicine), Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430079, China
| | - Chen Xiong
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
| | - Chunmeng Wang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Jun Deng
- Department of Oncology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Zhixiang Zuo
- State Key Laboratory of Oncology in South China, Cancer Center, Collaborative Innovation Center for Cancer Medicine, School of Life Sciences, Sun Yat-sen University, Guangzhou 510060, China
| | - Huijing Wu
- Department of Lymphoma Medicine (Breast Cancer & Soft Tissue Tumor Medicine), Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430079, China
| | - Jianping Xiong
- Department of Oncology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xiaohua Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, China
| | - Hua Lu
- Department of Biochemistry & Molecular Biology and Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Qian Hao
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.
| | - Xiang Zhou
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Fudan University, Shanghai 200032, China; Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China.
| |
Collapse
|
8
|
Pfister AS. An Update on Nucleolar Stress: The Transcriptional Control of Autophagy. Cells 2023; 12:2071. [PMID: 37626880 PMCID: PMC10453034 DOI: 10.3390/cells12162071] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Nucleolar stress reflects a misfunction of the nucleolus caused by a failure in ribosome biogenesis and defective nucleolar architecture. Various causes have been reported, most commonly mutation of ribosomal proteins and ribosome processing factors, as well as interference with these processes by intracellular or ectopic stress, such as RNA polymerase I inhibition, ROS, UV and others. The nucleolus represents the place for ribosome biogenesis and serves as a crucial hub in the cellular stress response. It has been shown to stimulate multiple downstream consequences, interfering with cell growth and survival. Nucleolar stress induction is most classically known to stimulate p53-dependent cell cycle arrest and apoptosis. Nucleolar stress represents a friend and enemy at the same time: From a pathophysiological perspective, inactivation of the nucleolar function by mutation or stress conditions is connected to multiple diseases, such as neurodegeneration, cancer and ribosomopathy syndromes. However, triggering the nucleolar stress response via specific chemotherapeutics, which interfere with nucleolar function, has beneficial effects for anti-cancer therapy. Interestingly, since the nucleolar stress response also triggers p53-independent mechanisms, it possesses the potential to specifically target p53-mutated tumors, which reflects the most common aberration in human cancer. More recent data have shown that the nucleolar stress response can activate autophagy and diverse signaling cascades that might allow initial pro-survival mechanisms. Nevertheless, it depends on the situation whether the cells undergo autophagy-mediated apoptosis or survive, as seen for autophagy-dependent drug resistance of chemotherapy-exposed tumor cells. Given the relatively young age of the research field, precise mechanisms that underly the involvement of autophagy in nucleolar stress are still under investigation. This review gives an update on the emerging contribution of nucleolar stress in the regulation of autophagy at a transcriptional level. It also appears that in autophagy p53-dependent as well as -independent responses are induced. Those could be exploited in future therapies against diseases connected to nucleolar stress.
Collapse
Affiliation(s)
- Astrid S Pfister
- Institute of Biochemistry and Molecular Biology, Ulm University, 89081 Ulm, Germany
| |
Collapse
|
9
|
Song Q, Liu XQ, Rainey JK. 1H, 15N and 13C backbone resonance assignments of the acidic domain of the human MDM2 protein. BIOMOLECULAR NMR ASSIGNMENTS 2023; 17:9-16. [PMID: 36309626 DOI: 10.1007/s12104-022-10112-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/07/2022] [Indexed: 06/02/2023]
Abstract
The human MDM2 protein regulates the tumor suppressor protein p53 by restricting its transcriptional activity and by promoting p53 degradation. MDM2 is ubiquitously expressed, with its overexpression implicated in many forms of cancer. The inhibitory effects of MDM2 on p53 have been shown to involve its N-terminal p53-binding domain and its C-terminal RING domain. The presence of an intact central acidic domain of MDM2 has also been shown to regulate p53 ubiquitination, with this domain shown to directly interact with the p53 DNA-binding domain to regulate the DNA binding activity of p53. To date, little structural information has been obtained for the MDM2 acidic domain. Thus, to gain insight into the structure and function relationship of this region, we have applied solution-state NMR spectroscopy to characterize the segment of MDM2 spanning residues 215-300. These boundaries for the acidic domain were determined on the basis of consensus observed in multiple sequence alignment. Here, we report the 1H, 15N and 13C backbone and 13Cβ chemical shift assignments and steady-state {1H}-15N heteronuclear NOE enhancement factors as a function of residue for the acidic domain of MDM2. We show that this domain exhibits the hallmarks of being a disordered protein, on the basis both of assigned chemical shifts and residue-level backbone dynamics, with localized variation in secondary structure propensity inferred from chemical shift analysis.
Collapse
Affiliation(s)
- Qinyan Song
- Department of Biochemistry & Molecular Biology, Dalhousie University, B3H 4R2, Halifax, NS, Canada
| | - Xiang-Qin Liu
- Department of Biochemistry & Molecular Biology, Dalhousie University, B3H 4R2, Halifax, NS, Canada.
| | - Jan K Rainey
- Department of Biochemistry & Molecular Biology, Dalhousie University, B3H 4R2, Halifax, NS, Canada.
- Department of Chemistry, Dalhousie University, B3H 4R2, Halifax, NS, Canada.
- School of Biomedical Engineering, Dalhousie University, B3H 4R2, Halifax, NS, Canada.
| |
Collapse
|
10
|
Gan Y, Deng J, Hao Q, Huang Y, Han T, Xu JG, Zhao M, Yao L, Xu Y, Xiong J, Lu H, Wang C, Chen J, Zhou X. UTP11 deficiency suppresses cancer development via nucleolar stress and ferroptosis. Redox Biol 2023; 62:102705. [PMID: 37087976 PMCID: PMC10149416 DOI: 10.1016/j.redox.2023.102705] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 04/17/2023] [Indexed: 04/25/2023] Open
Abstract
The eukaryotic ribosome is essential for cancer cell survival. Perturbation of ribosome biogenesis induces nucleolar stress or ribosomal stress, which restrains cancer growth, as rapidly proliferating cancer cells need more active ribosome biogenesis. In this study, we found that UTP11 plays an important role in the biosynthesis of 18S ribosomal RNAs (rRNA) by binding to the pre-rRNA processing factor, MPP10. UTP11 is overexpressed in human cancers and associated with poor prognoses. Interestingly, depletion of UTP11 inhibits cancer cell growth in vitro and in vivo through p53-depedednt and -independent mechanisms, whereas UTP11 overexpression promotes cancer cell growth and progression. On the one hand, the ablation of UTP11 impedes 18S rRNA biosynthesis to trigger nucleolar stress, thereby preventing MDM2-mediated p53 ubiquitination and degradation through ribosomal proteins, RPL5 and RPL11. On the other hand, UTP11 deficiency represses the expression of SLC7A11 by promoting the decay of NRF2 mRNA, resulting in reduced levels of glutathione (GSH) and enhanced ferroptosis. Altogether, our study uncovers a critical role for UTP11 in maintaining cancer cell survival and growth, as depleting UTP11 leads to p53-dependent cancer cell growth arrest and p53-independent ferroptosis.
Collapse
Affiliation(s)
- Yu Gan
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, 330006, China; Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Jun Deng
- Department of Oncology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Qian Hao
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Yingdan Huang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Tao Han
- Institutes of Health Central Plains, Xinxiang Medical University, Xinxiang, 453003, China
| | - Jin-Guo Xu
- Institutes of Health Central Plains, Xinxiang Medical University, Xinxiang, 453003, China
| | - Min Zhao
- School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore DC, Queensland, 4558, Australia
| | - Litong Yao
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Yingying Xu
- Department of Breast Surgery, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Jianping Xiong
- Department of Oncology, The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Hua Lu
- Department of Biochemistry & Molecular Biology and Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Chunmeng Wang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China.
| | - Jiaxiang Chen
- Department of Physiology, School of Basic Medical Sciences, Nanchang University, Nanchang, 330006, China.
| | - Xiang Zhou
- Fudan University Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, 200032, China; Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China.
| |
Collapse
|
11
|
Eastham MJ, Pelava A, Wells GR, Watkins NJ, Schneider C. RPS27a and RPL40, Which Are Produced as Ubiquitin Fusion Proteins, Are Not Essential for p53 Signalling. Biomolecules 2023; 13:898. [PMID: 37371478 DOI: 10.3390/biom13060898] [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: 04/13/2023] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
Two of the four human ubiquitin-encoding genes express ubiquitin as an N-terminal fusion precursor polypeptide, with either ribosomal protein (RP) RPS27a or RPL40 at the C-terminus. RPS27a and RPL40 have been proposed to be important for the induction of the tumour suppressor p53 in response to defects in ribosome biogenesis, suggesting that they may play a role in the coordination of ribosome production, ubiquitin levels and p53 signalling. Here, we report that RPS27a is cleaved from the ubiquitin-RP precursor in a process that appears independent of ribosome biogenesis. In contrast to other RPs, the knockdown of either RPS27a or RPL40 did not stabilise the tumour suppressor p53 in U2OS cells. Knockdown of neither protein blocked p53 stabilisation following inhibition of ribosome biogenesis by actinomycin D, indicating that they are not needed for p53 signalling in these cells. However, the knockdown of both RPS27a and RPL40 in MCF7 and LNCaP cells robustly induced p53, consistent with observations made with the majority of other RPs. Importantly, RPS27a and RPL40 are needed for rRNA production in all cell lines tested. Our data suggest that the role of RPS27a and RPL40 in p53 signalling, but not their importance in ribosome biogenesis, differs between cell types.
Collapse
Affiliation(s)
- Matthew John Eastham
- Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Andria Pelava
- Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Graeme Raymond Wells
- Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Nicholas James Watkins
- Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Claudia Schneider
- Biosciences Institute, The Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| |
Collapse
|
12
|
Pant V, Sun C, Lozano G. Tissue specificity and spatio-temporal dynamics of the p53 transcriptional program. Cell Death Differ 2023; 30:897-905. [PMID: 36755072 PMCID: PMC10070629 DOI: 10.1038/s41418-023-01123-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/30/2022] [Accepted: 11/15/2022] [Indexed: 02/10/2023] Open
Abstract
Transcription factors regulate hundreds of genes and p53 is no exception. As a stress responsive protein, p53 transactivates an array of downstream targets which define its role in maintaining physiological functions of cells/tissues. Despite decades of studies, our understanding of the p53 in vivo transcriptional program is still incomplete. Here we discuss some of the physiological stressors that activate p53, the pathological and physiological implications of p53 activation and the molecular profiling of the p53 transcriptional program in maintaining tissue homeostasis. We argue that the p53 transcriptional program is spatiotemporally regulated in a tissue-specific manner and define a p53 target signature that faithfully depicts p53 activity. We further emphasize that additional in vivo studies are needed to refine the p53 transactivation profile to harness it for therapeutic purposes.
Collapse
Affiliation(s)
- Vinod Pant
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Chang Sun
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Guillermina Lozano
- Department of Genetics, 1515 Holcombe Blvd, University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| |
Collapse
|
13
|
Li Y, Carey TS, Feng CH, Zhu HM, Sun XX, Dai MS. The Ubiquitin-specific Protease USP36 Associates with the Microprocessor Complex and Regulates miRNA Biogenesis by SUMOylating DGCR8. CANCER RESEARCH COMMUNICATIONS 2023; 3:459-470. [PMID: 36950067 PMCID: PMC10026737 DOI: 10.1158/2767-9764.crc-22-0344] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 01/19/2023] [Accepted: 02/13/2023] [Indexed: 02/18/2023]
Abstract
miRNA biogenesis is a cellular process that produces mature miRNAs from their primary transcripts, pri-miRNAs, via two RNAse III enzyme complexes: the Drosha-DGCR8 microprocessor complex in the nucleus and the Dicer-TRBP complex in the cytoplasm. Emerging evidence suggests that miRNA biogenesis is tightly regulated by posttranscriptional and posttranslational modifications and aberrant miRNA biogenesis is associated with various human diseases including cancer. DGCR8 has been shown to be modified by SUMOylation. Yet, the SUMO ligase mediating DGCR8 SUMOylation is currently unknown. Here, we report that USP36, a nucleolar ubiquitin-specific protease essential for ribosome biogenesis, is a novel regulator of DGCR8. USP36 interacts with the microprocessor complex and promotes DGCR8 SUMOylation, specifically modified by SUMO2. USP36-mediated SUMOylation does not affect the levels of DGCR8 and the formation of the Drosha-DGCR8 complex, but promotes the binding of DGCR8 to pri-miRNAs. Consistently, abolishing DGCR8 SUMOylation significantly attenuates its binding to pri-miRNAs and knockdown of USP36 attenuates pri-miRNA processing, resulting in marked reduction of tested mature miRNAs. Induced expression of a SUMOylation-defective mutant of DGCR8 inhibits cell proliferation. Together, these results suggest that USP36 plays an important role in regulating miRNA biogenesis by SUMOylating DGCR8. Significance This study identifies that USP36 mediates DGCR8 SUMOylation by SUMO2 and is critical for miRNA biogenesis. As USP36 is frequently overexpressed in various human cancers, our study suggests that deregulated USP36-miRNA biogenesis pathway may contribute to tumorigenesis.
Collapse
Affiliation(s)
- Yanping Li
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Timothy S. Carey
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Catherine H. Feng
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Hong-Ming Zhu
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Xiao-Xin Sun
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| | - Mu-Shui Dai
- Department of Molecular and Medical Genetics, School of Medicine, Oregon Health & Science University, Portland, Oregon
| |
Collapse
|
14
|
Naineni SK, Robert F, Nagar B, Pelletier J. Targeting DEAD-box RNA helicases: The emergence of molecular staples. WILEY INTERDISCIPLINARY REVIEWS. RNA 2023; 14:e1738. [PMID: 35581936 DOI: 10.1002/wrna.1738] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 04/13/2022] [Accepted: 04/16/2022] [Indexed: 12/29/2022]
Abstract
RNA helicases constitute a large family of proteins that play critical roles in mediating RNA function. They have been implicated in all facets of gene expression pathways involving RNA, from transcription to processing, transport and translation, and storage and decay. There is significant interest in developing small molecule inhibitors to RNA helicases as some family members have been documented to be dysregulated in neurological and neurodevelopment disorders, as well as in cancers. Although different functional properties of RNA helicases offer multiple opportunities for small molecule development, molecular staples have recently come to the forefront. These bifunctional molecules interact with both protein and RNA components to lock them together, thereby imparting novel gain-of-function properties to their targets. This article is categorized under: RNA Interactions with Proteins and Other Molecules > Small Molecule-RNA Interactions RNA Interactions with Proteins and Other Molecules > Protein-RNA Interactions: Functional Implications.
Collapse
Affiliation(s)
- Sai Kiran Naineni
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Francis Robert
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Bhushan Nagar
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Jerry Pelletier
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada.,Department of Oncology, McGill University, Montreal, Quebec, Canada.,Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, Quebec, Canada
| |
Collapse
|
15
|
Yi Y, Zeng Y, Sam TW, Hamashima K, Tan RJR, Warrier T, Phua JX, Taneja R, Liou YC, Li H, Xu J, Loh YH. Ribosomal proteins regulate 2-cell-stage transcriptome in mouse embryonic stem cells. Stem Cell Reports 2023; 18:463-474. [PMID: 36638791 PMCID: PMC9968990 DOI: 10.1016/j.stemcr.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 01/14/2023] Open
Abstract
A rare sub-population of mouse embryonic stem cells (mESCs), the 2-cell-like cell, is defined by the expression of MERVL and 2-cell-stage-specific transcript (2C transcript). Here, we report that the ribosomal proteins (RPs) RPL14, RPL18, and RPL23 maintain the identity of mESCs and regulate the expression of 2C transcripts. Disregulation of the RPs induces DUX-dependent expression of 2C transcripts and alters the chromatin landscape. Mechanically, knockdown (KD) of RPs triggers the binding of RPL11 to MDM2, an interaction known to prevent P53 protein degradation. Increased P53 protein upon RP KD further activates its downstream pathways, including DUX. Our study delineates the critical roles of RPs in 2C transcript activation, ascribing a novel function to these essential proteins.
Collapse
Affiliation(s)
- Yao Yi
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
| | - Yingying Zeng
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Tsz Wing Sam
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore; Department of Physiology, Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
| | - Kiyofumi Hamashima
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore
| | - Rachel Jun Rou Tan
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore
| | - Tushar Warrier
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore
| | - Jun Xiang Phua
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore
| | - Reshma Taneja
- Department of Physiology, Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
| | - Yih-Cherng Liou
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
| | - Hu Li
- Center for Individualized Medicine, Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, MN 55905, USA
| | - Jian Xu
- Department of Plant Systems Physiology, Institute for Water and Wetland Research, Radboud University, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands; Department of Biological Sciences and Centre for BioImaging Sciences, National University of Singapore, Singapore 117543, Singapore; Joint Center for Single Cell Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Yuin-Han Loh
- Cell Fate Engineering and Therapeutics Laboratory, Division of Cell Biology and Therapies, Institute of Molecular and Cell Biology, A(∗)STAR, Singapore 138673, Singapore; Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore; NUS Graduate School for Integrative Sciences and Engineering Programme, National University of Singapore, Singapore 119077, Singapore; Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore.
| |
Collapse
|
16
|
Hu YX, Jing Q. Zebrafish: a convenient tool for myelopoiesis research. CELL REGENERATION (LONDON, ENGLAND) 2023; 12:2. [PMID: 36595106 PMCID: PMC9810781 DOI: 10.1186/s13619-022-00139-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 08/29/2022] [Indexed: 04/18/2023]
Abstract
Myelopoiesis is the process in which the mature myeloid cells, including monocytes/macrophages and granulocytes, are developed. Irregular myelopoiesis may cause and deteriorate a variety of hematopoietic malignancies such as leukemia. Myeloid cells and their precursors are difficult to capture in circulation, let alone observe them in real time. For decades, researchers had to face these difficulties, particularly in in-vivo studies. As a unique animal model, zebrafish possesses numerous advantages like body transparency and convenient genetic manipulation, which is very suitable in myelopoiesis research. Here we review current knowledge on the origin and regulation of myeloid development and how zebrafish models were applied in these studies.
Collapse
Affiliation(s)
- Yang-Xi Hu
- Department of Cardiology, Changzheng Hospital, Shanghai, 200003, China
| | - Qing Jing
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai, 200031, China.
| |
Collapse
|
17
|
Effector protein Hcp2a of avian pathogenic Escherichia coli interacts with the endoplasmatic reticulum associated RPL23 protein of chicken DF-1 fibroblasts. Vet Res 2023; 54:6. [PMID: 36717947 PMCID: PMC9885592 DOI: 10.1186/s13567-023-01138-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 01/06/2023] [Indexed: 01/31/2023] Open
Abstract
The type VI secretion system (T6SS) is a secretion apparatus widely found in pathogenic Gram-negative bacteria and is important for competition among various bacteria and host cell pathogenesis. Hcp is a core component of functional T6SS and transports toxic effectors into target cells by assembling to form tube-like structures. Studies have shown that Hcp simultaneously acts as an effector to influence cellular physiological activities; however, the mechanism of its activity in host cells remains unclear. To investigate the target of effector protein Hcp2a in a chicken fibroblast cell line, we first detected the subcellular localization of Hcp2a in DF-1 cells by indirect immunofluorescence assay. The results showed that Hcp2a protein was localized in the endoplasmic reticulum of DF-1 cells. We also used a streptavidin-biotin affinity pull-down assay combined with LC-MS/MS to screen DF-1 cell lysates for proteins that interact with Hcp2a and analyze the cellular functional pathways affected by them. The results showed that Hcp2a interacted with 52 DF-1 cellular proteins that are involved in multiple intracellular pathways. To further explore the mechanism of Hcp2a protein targeting the endoplasmic reticulum of DF-1 cells, we screened three endoplasmic reticulum-associated proteins (RSL1D1, RPS3A, and RPL23) from 52 prey proteins of Hcp2a for protein-protein molecular docking analysis. The docking analysis showed that the effector protein Hcp2a and the RPL23 protein had good complementarity. Overall, we propose that Hcp2a has strong binding activity to the RPL23 protein in DF-1 cells and this may help Hcp2a anchor to the endoplasmic reticulum in DF-1 cells.
Collapse
|
18
|
Bhattarai N, Cao B, Zeng SX, Lu H. Ribosomal Profiling by Gradient Fractionation of Cell Lysates. Methods Mol Biol 2023; 2666:149-155. [PMID: 37166663 DOI: 10.1007/978-1-0716-3191-1_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Ribosomal profiling is a widely used technique for deep sequencing of ribosome-protected mRNA and for measuring ribosome status in cells. It is a powerful method that is typically employed for monitoring and measuring protein translation status and ribosome activity. Also, it has been used for monitoring the ribosomal stress-responsive events in the ribosome activity. Furthermore, this approach enables understanding of translational regulation, which is invisible in most proteomic approaches. Moreover, this method is known as an important approach for biological discovery such as identification of translation products. Hence, this methodology will be useful for studying cellular events engaging in ribosome assembly, ribosome biogenesis, ribosome activity, translation during the cell cycle, cell proliferation, and growth as well as the ribosomal stress response in mammalian cells.
Collapse
Affiliation(s)
- Nimisha Bhattarai
- Department of Biochemistry & Molecular Biology and Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Bo Cao
- Xavier University of Louisiana College of Pharmacy, New Orleans, LA, USA
| | - Shelya X Zeng
- Department of Biochemistry & Molecular Biology and Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Hua Lu
- Department of Biochemistry & Molecular Biology and Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA.
| |
Collapse
|
19
|
Ko HM, Jee W, Lee D, Jang HJ, Jung JH. Ophiopogonin D increase apoptosis by activating p53 via ribosomal protein L5 and L11 and inhibiting the expression of c-Myc via CNOT2. Front Pharmacol 2022; 13:974468. [PMID: 36569330 PMCID: PMC9780504 DOI: 10.3389/fphar.2022.974468] [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: 06/21/2022] [Accepted: 11/07/2022] [Indexed: 12/13/2022] Open
Abstract
Ophiopogonin D (OP-D), which is extracted from the root tuber of Ophiopogon japonicus, is well known for its anti-inflammatory, anti-oxidant, and anti-cancer effects. It is also therapeutic for various diseases such as diabetic myocardial injuries, obesity, atopic dermatitis, and osteoporosis. However, there are insufficient reports on the anti-cancer effects and molecular mechanisms of OP-D in colorectal cancer. Therefore, this study aimed to investigate the anti-cancer-modulating effect of OP-D on colorectal cancer. The study proved that OP-D (20-40 uM) has significant cell viability inhibition and anti-proliferative effects in Cell Counting Kit-8 (CCK-8) assay and colony formation assay. In addition, our immunofluorescence analysis data showed that OP-D (40 uM) inhibited the expression of Ki67, a cell proliferation marker, and confirmed that OP-D could induce nucleolar stress by depletion of IPO7 and XPO1. Furthermore, our western blot data showed that OP-D induced p53 expression via ribosomal protein (RP) L5 or L11 and inhibited c-Myc expression through CNOT2 in a dose-dependent manner. Additionally, OP-D regulated cyclin D1 and CDK4, which are well known as cell cycle regulatory proteins. OP-D consistently inhibited the phosphorylation of AKT expression in a dose-dependent manner. Furthermore, OP-D shortened c-Myc's half-life in a time-dependent manner. Furthermore, CNOT2 knockdown enhanced the inhibitory effect of OP-D on c-Myc in colon cancer cells. Besides that, we confirmed that OP-D has a combinational anti-cancer effect of 5-FU or doxorubicin to reduce cell viability and induce apoptosis through p53 and c-Myc regulation. Altogether, our results suggest that OP-D regulates colon cancer cell proliferation and induces apoptosis by inhibiting c-Myc expression via activation of p53 and CNOT2 regulation. The study demonstrated that OP-D may be a promising natural anti-cancer agent for the treatment of colorectal cancer.
Collapse
Affiliation(s)
- Hyun Min Ko
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea,Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, China
| | - Wona Jee
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea,Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, China
| | - Duckgue Lee
- Soonchunhyang Institute of Medi-bio Science, Soonchunhyang University, Cheonan-si, South Korea
| | - Hyeung-Jin Jang
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea,Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, China,*Correspondence: Hyeung-Jin Jang, ; Ji Hoon Jung,
| | - Ji Hoon Jung
- College of Korean Medicine, Kyung Hee University, Seoul, South Korea,Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul, China,*Correspondence: Hyeung-Jin Jang, ; Ji Hoon Jung,
| |
Collapse
|
20
|
Hannan KM, Soo P, Wong MS, Lee JK, Hein N, Poh P, Wysoke KD, Williams TD, Montellese C, Smith LK, Al-Obaidi SJ, Núñez-Villacís L, Pavy M, He JS, Parsons KM, Loring KE, Morrison T, Diesch J, Burgio G, Ferreira R, Feng ZP, Gould CM, Madhamshettiwar PB, Flygare J, Gonda TJ, Simpson KJ, Kutay U, Pearson RB, Engel C, Watkins NJ, Hannan RD, George AJ. Nuclear stabilization of p53 requires a functional nucleolar surveillance pathway. Cell Rep 2022; 41:111571. [DOI: 10.1016/j.celrep.2022.111571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/06/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022] Open
|
21
|
Temaj G, Hadziselimovic R, Nefic H, Nuhii N. Ribosome biogenesis and ribosome therapy in cancer cells. RESEARCH RESULTS IN PHARMACOLOGY 2022. [DOI: 10.3897/rrpharmacology.8.81706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Introduction: The process of protein synthesis is a vital process for all kingdoms of life. The ribosome is a ribonucleoprotein complex that reads the genetic code, from messenger RNA (mRNA) to produce proteins and to tightly regulate and ensure cells growth. The fact that numerous diseases are caused by defect during the ribosome biogenesis is important to understand this pathway.
Materials and methods: We have analyzed the literature for ribosome biogenesis and its links with different diseases which have been found.
Results and discussion: We have discussed the key aspect of human ribosome biogenesis and its links to diseases. We have also proposed the potential of applying this knowledge to the development of a ribosomal stress-based cancer therapy.
Conclusion: Major challenges in the future will be to determine factors which play a pivotal role during ribosome biogenesis. Therefore, more anti-cancer drugs and gene therapy for genetic diseases will be developed against ribosomal biogenesis in the coming years.
Graphical abstract:
Collapse
|
22
|
Song Q, Liu XQ, Rainey JK. The MDMX acidic domain competes with the p53 transactivation domain for MDM2 N-terminal domain binding. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119319. [PMID: 35780910 DOI: 10.1016/j.bbamcr.2022.119319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/07/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
The tumor suppressor protein p53 governs many cellular pathways to control genome integrity, metabolic homeostasis, and cell viability. The critical roles of p53 highlight the importance of proper control over p53 in maintaining normal cellular function, with the negative regulators MDM2 and MDMX playing central roles in regulating p53 activity. The interaction between p53 and either MDM2 or MDMX involves the p53 transactivation domain (p53TD) and the N-terminal domains (NTD) of MDM2 or MDMX. Recently, the acidic domain (AD) of MDMX was found to bind to its own NTD, inhibiting the p53-MDMX interaction. Given the established structural and functional similarity between the MDM2 and MDMX NTDs, we hypothesized that the MDMX AD would also directly bind to MDM2 NTD to inhibit p53-MDM2 interaction. Through solution-state nuclear magnetic resonance (NMR) spectroscopy and isothermal titration calorimetry (ITC), we show that the MDMX AD can indeed directly interact with the MDM2 NTD and, as a result, can compete for p53 binding. The MDMX AD is thus able to serve as a regulatory domain to inhibit the MDM2-p53 interaction and may also play a direct role in p53 activation.
Collapse
Affiliation(s)
- Qinyan Song
- Department of Biochemistry & Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Xiang-Qin Liu
- Department of Biochemistry & Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| | - Jan K Rainey
- Department of Biochemistry & Molecular Biology, Dalhousie University, Halifax, NS B3H 4R2, Canada; Department of Chemistry, Dalhousie University, Halifax, NS B3H 4R2, Canada; School of Biomedical Engineering, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| |
Collapse
|
23
|
Liao H, Gaur A, McConie H, Shekar A, Wang K, Chang JT, Breton G, Denicourt C. Human NOP2/NSUN1 regulates ribosome biogenesis through non-catalytic complex formation with box C/D snoRNPs. Nucleic Acids Res 2022; 50:10695-10716. [PMID: 36161484 PMCID: PMC9561284 DOI: 10.1093/nar/gkac817] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/14/2022] [Indexed: 11/18/2022] Open
Abstract
5-Methylcytosine (m5C) is a base modification broadly found on various RNAs in the human transcriptome. In eukaryotes, m5C is catalyzed by enzymes of the NSUN family composed of seven human members (NSUN1-7). NOP2/NSUN1 has been primarily characterized in budding yeast as an essential ribosome biogenesis factor required for the deposition of m5C on the 25S ribosomal RNA (rRNA). Although human NOP2/NSUN1 has been known to be an oncogene overexpressed in several types of cancer, its functions and substrates remain poorly characterized. Here, we used a miCLIP-seq approach to identify human NOP2/NSUN1 RNA substrates. Our analysis revealed that NOP2/NSUN1 catalyzes the deposition of m5C at position 4447 on the 28S rRNA. We also find that NOP2/NSUN1 binds to the 5′ETS region of the pre-rRNA transcript and regulates pre-rRNA processing through non-catalytic complex formation with box C/D snoRNAs. We provide evidence that NOP2/NSUN1 facilitates the recruitment of U3 and U8 snoRNAs to pre-90S ribosomal particles and their stable assembly into snoRNP complexes. Remarkably, expression of both WT and catalytically inactive NOP2/NSUN1 in knockdown background rescues the rRNA processing defects and the stable assembly of box C/D snoRNP complexes, suggesting that NOP2/NSUN1-mediated deposition of m5C on rRNA is not required for ribosome synthesis.
Collapse
Affiliation(s)
- Han Liao
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Anushri Gaur
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Hunter McConie
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Amirtha Shekar
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Karen Wang
- Wiess College, Rice University, Houston, TX 77251, USA
| | - Jeffrey T Chang
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Ghislain Breton
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| | - Catherine Denicourt
- Department of Integrative Biology and Pharmacology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX 77030, USA
| |
Collapse
|
24
|
Li M, Huang F, Xie Z, Hong H, Xu Q, Peng Z. Identification of three small nucleolar RNAs (snoRNAs) as potential prognostic markers in diffuse large B-cell lymphoma. Cancer Med 2022; 12:3812-3829. [PMID: 36812125 PMCID: PMC9939161 DOI: 10.1002/cam4.5115] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 07/13/2022] [Accepted: 07/22/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Diffuse large B-cell lymphoma (DLBCL) is a non-Hodgkin lymphoma with high mortality rates. Small nucleolar RNAs (snoRNAs) are tumor-specific biological markers, but there are few studies on the role of snoRNAs in DLBCL. MATERIALS AND METHODS Survival-related snoRNAs were selected to construct a specific snoRNA-based signature via computational analyses (Cox regression and independent prognostic analyses) to predict the prognosis of DLBCL patients. To assist in clinical applications, a nomogram was built by combining the risk model and other independent prognostic factors. Pathway analysis, gene ontology analysis, transcription factor enrichment, protein-protein interactions, and single nucleotide variant analysis were used to explore the potential biological mechanisms of co-expressed genes. RESULTS Twelve prognosis-correlated snoRNAs were selected from the DLBCL patient cohort of microarray profiles, and a three-snoRNA signature consisting of SNORD1A, SNORA60, and SNORA66 was constructed. DLBCL patients could be divided into high-risk and low-risk cohorts using the risk model, and the high-risk group and activated B cell-like (ABC) type DLBCL were linked with disappointing survival. In addition, SNORD1A co-expressed genes were inseparably linked to the biological functions of the ribosome and mitochondria. Potential transcriptional regulatory networks have also been identified. MYC and RPL10A were the most mutated SNORD1A co-expressed genes in DLBCL. CONCLUSION Put together, our findings explored the potential biological effects of snoRNAs in DLBCL, and provided a new predictor for DLBCL prediction.
Collapse
Affiliation(s)
- Mei‐wei Li
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| | - Feng‐xiang Huang
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| | - Zu‐cheng Xie
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| | - Hao‐yuan Hong
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| | - Qing‐yuan Xu
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| | - Zhi‐gang Peng
- Department of Medical OncologyFirst Affiliated Hospital of Guangxi Medical UniversityNanningGuangxi Zhuang Autonomous RegionP. R. China
| |
Collapse
|
25
|
Kowalczyk D, Nakasone MA, Smith BO, Huang DT. Bivalent binding of p14ARF to MDM2 RING and acidic domains inhibits E3 ligase function. Life Sci Alliance 2022; 5:e202201472. [PMID: 35944929 PMCID: PMC9366199 DOI: 10.26508/lsa.202201472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/19/2022] [Accepted: 07/19/2022] [Indexed: 12/29/2022] Open
Abstract
ARF tumor suppressor protein is a key regulator of the MDM2-p53 signaling axis. ARF interferes with MDM2-mediated ubiquitination and degradation of p53 by sequestering MDM2 in the nucleolus and preventing MDM2-p53 interaction and nuclear export of p53. Moreover, ARF also directly inhibits MDM2 ubiquitin ligase (E3) activity, but the mechanism remains elusive. Here, we apply nuclear magnetic resonance and biochemical analyses to uncover the mechanism of ARF-mediated inhibition of MDM2 E3 activity. We show that MDM2 acidic and zinc finger domains (AD-ZnF) form a weak intramolecular interaction with the RING domain, where the binding site overlaps with the E2∼ubiquitin binding surface and thereby partially reduces MDM2 E3 activity. Binding of human N-terminal 32 residues of p14ARF to the acidic domain of MDM2 strengthens the AD-ZnF-RING domain interaction. Furthermore, the N-terminal RxFxV motifs of p14ARF participate directly in the MDM2 RING domain interaction. This bivalent binding mode of p14ARF to MDM2 acidic and RING domains restricts E2∼ubiquitin recruitment and massively hinders MDM2 E3 activity. These findings elucidate the mechanism by which ARF inhibits MDM2 E3 activity.
Collapse
Affiliation(s)
| | | | - Brian O Smith
- Institute of Molecular Cell and System Biology, University of Glasgow, Glasgow, UK
| | - Danny T Huang
- Cancer Research UK Beatson Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| |
Collapse
|
26
|
Temaj G, Saha S, Dragusha S, Ejupi V, Buttari B, Profumo E, Beqa L, Saso L. Ribosomopathies and cancer: pharmacological implications. Expert Rev Clin Pharmacol 2022; 15:729-746. [PMID: 35787725 DOI: 10.1080/17512433.2022.2098110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION The ribosome is a ribonucleoprotein organelle responsible for protein synthesis, and its biogenesis is a highly coordinated process that involves many macromolecular components. Any acquired or inherited impairment in ribosome biogenesis or ribosomopathies is associated with the development of different cancers and rare genetic diseases. Interference with multiple steps of protein synthesis has been shown to promote tumor cell death. AREAS COVERED We discuss the current insights about impaired ribosome biogenesis and their secondary consequences on protein synthesis, transcriptional and translational responses, proteotoxic stress, and other metabolic pathways associated with cancer and rare diseases. Studies investigating the modulation of different therapeutic chemical entities targeting cancer in in vitro and in vivo models have also been detailed. EXPERT OPINION Despite the association between inherited mutations affecting ribosome biogenesis and cancer biology, the development of therapeutics targeting the essential cellular machinery has only started to emerge. New chemical entities should be designed to modulate different checkpoints (translating oncoproteins, dysregulation of specific ribosome-assembly machinery, ribosomal stress, and rewiring ribosomal functions). Although safe and effective therapies are lacking, consideration should also be given to using existing drugs alone or in combination for long-term safety, with known risks for feasibility in clinical trials and synergistic effects.
Collapse
Affiliation(s)
| | - Sarmistha Saha
- Department of Cardiovascular, Endocrine-metabolic Diseases, and Aging, Italian National Institute of Health, Rome, Italy
| | | | - Valon Ejupi
- College UBT, Faculty of Pharmacy, Prishtina, Kosovo
| | - Brigitta Buttari
- Department of Cardiovascular, Endocrine-metabolic Diseases, and Aging, Italian National Institute of Health, Rome, Italy
| | - Elisabetta Profumo
- Department of Cardiovascular, Endocrine-metabolic Diseases, and Aging, Italian National Institute of Health, Rome, Italy
| | - Lule Beqa
- College UBT, Faculty of Pharmacy, Prishtina, Kosovo
| | - Luciano Saso
- Department of Physiology and Pharmacology "Vittorio Erspamer", Sapienza University of Rome, Italy
| |
Collapse
|
27
|
Han T, Tong J, Wang M, Gan Y, Gao B, Chen J, Liu Y, Hao Q, Zhou X. Olaparib Induces RPL5/RPL11-Dependent p53 Activation via Nucleolar Stress. Front Oncol 2022; 12:821366. [PMID: 35719981 PMCID: PMC9204002 DOI: 10.3389/fonc.2022.821366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 05/11/2022] [Indexed: 11/25/2022] Open
Abstract
The poly (ADP-ribose) polymerase (PARP) inhibitor (PARPi) Olaparib is a widely used targeted therapy for a variety of solid tumors with homologous recombination deficiency (HRD) caused by mutation of BRCA1/2 or other DNA repair genes. The anti-tumor activity of Olaparib has been largely attributed to its ability to inhibit PARP enzymes and block DNA single-strand break (SSB) repair, which eventually leads to the most detrimental DNA damage, double-strand breaks (DSB), in HRD cells. Although PARPi was found to induce p53-dependent cell death, the underlying molecular mechanism remains incompletely understood. Here, we report that Olaparib treatment leads to p53 stabilization and activation of its downstream target genes in a dose- and time-dependent manner. Mechanistically, Olaparib triggers nucleolar stress by inhibiting biosynthesis of the precursor of ribosomal RNAs (pre-rRNA), resulting in enhanced interaction between ribosomal proteins (RPs), RPL5 and RPL11, and MDM2. Consistently, knockdown of RPL5 and RPL11 prevents Olaparib-induced p53 activation. More importantly, Olaparib efficiently suppresses breast and colorectal cancer cell survival and proliferation through activation of p53. Altogether, our study demonstrates that Olaparib activates the nucleolar stress-RPs-p53 pathway, suggesting rRNA biogenesis as a novel target for PARPi.
Collapse
Affiliation(s)
- Tao Han
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Jing Tong
- Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Mengxin Wang
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Yu Gan
- Department of Physiology, Medical College of Nanchang University, Nanchang, China
| | - Bo Gao
- Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China
| | - Jiaxiang Chen
- Department of Physiology, Medical College of Nanchang University, Nanchang, China
| | - Youxun Liu
- School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Qian Hao
- Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiang Zhou
- Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology), Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| |
Collapse
|
28
|
Shen Y, Xie G, Lin S, Zhu L, Zhang H, Yang Z, Cai Z. Metabolomics and proteomics study reveals the effects of benzo[a]pyrene on the viability and migration of KYSE-150 esophageal cells. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 824:153761. [PMID: 35151731 DOI: 10.1016/j.scitotenv.2022.153761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/29/2022] [Accepted: 02/05/2022] [Indexed: 06/14/2023]
Abstract
A representative polycyclic aromatic hydrocarbon, benzo[a]pyrene (B[a]P), has been widely detected in environmental compartments and is highly carcinogenic to humans. Oral ingestion of B[a]P is the dominant exposure pathway. The esophagus acts as the first contact point when B[a]P enters the human body. However, its role in the development of human esophageal cancer is rarely discussed. Herein, we employed untargeted metabolomics in combination with proteomics to explore B[a]P-related intracellular responses in human esophageal cell lines. Our results demonstrated that B[a]P exposure induced significant metabolic disorders, further leading to overproduction of reactive oxygen species (ROS) and disturbance of the cellular viability process and migration ability of esophageal cells. In response, glutathione (GSH) was consumed to meet the demand for cellular detoxification, and thioredoxin (TXN) was upregulated to balance the cellular redox. These alterations caused the reregulation of some specific protein families, including S100A proteins, ribosomal proteins, and histone H1 proteins. Such changes impeded the viability and migration of esophageal cells, which could adversely affect wound healing of the epithelium. These cellular responses indicate that B[a]P will cause serious cellular damage to esophageal cells and increase the carcinogenic risk even as a result of short-term exposure. SYNOPSIS: Our omics study demonstrated how benzo[a]pyrene hampered the migration of esophageal cells and proposed a plausible mechanism underlying its carcinogenicity, which may contribute to our understanding of environmental pollutants.
Collapse
Affiliation(s)
- Yuting Shen
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Guangshan Xie
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Siyi Lin
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Lin Zhu
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Hongna Zhang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Zhu Yang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China.
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| |
Collapse
|
29
|
Luan Y, Tang N, Yang J, Liu S, Cheng C, Wang Y, Chen C, Guo YN, Wang H, Zhao W, Zhao Q, Li W, Xiang M, Ju R, Xie Z. Deficiency of ribosomal proteins reshapes the transcriptional and translational landscape in human cells. Nucleic Acids Res 2022; 50:6601-6617. [PMID: 35137207 PMCID: PMC9262593 DOI: 10.1093/nar/gkac053] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 01/13/2022] [Accepted: 02/03/2022] [Indexed: 01/05/2023] Open
Abstract
Human ribosomes have long been thought to be uniform factories with little regulatory function. Accumulating evidence emphasizes the heterogeneity of ribosomal protein (RP) expression in specific cellular functions and development. However, a systematic understanding of functional relevance of RPs is lacking. Here, we surveyed translational and transcriptional changes after individual knockdown of 75 RPs, 44 from the large subunit (60S) and 31 from the small subunit (40S), by Ribo-seq and RNA-seq analyses. Deficiency of individual RPs altered specific subsets of genes transcriptionally and translationally. RP genes were under cotranslational regulation upon ribosomal stress, and deficiency of the 60S RPs and the 40S RPs had opposite effects. RP deficiency altered the expression of genes related to eight major functional classes, including the cell cycle, cellular metabolism, signal transduction and development. 60S RP deficiency led to greater inhibitory effects on cell growth than did 40S RP deficiency, through P53 signaling. Particularly, we showed that eS8/RPS8 deficiency stimulated apoptosis while eL13/RPL13 or eL18/RPL18 deficiency promoted senescence. We also validated the phenotypic impacts of uL5/RPL11 and eL15/RPL15 deficiency on retina development and angiogenesis, respectively. Overall, our study provides a valuable resource for and novel insights into ribosome regulation in cellular activities, development and diseases.
Collapse
Affiliation(s)
- Yizhao Luan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Nan Tang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Jiaqi Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Shuting Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Chichi Cheng
- School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Yan Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Congying Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Ya-Nan Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Hongwei Wang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Wenxue Zhao
- School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Qian Zhao
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong SAR 999077, China
| | - Wei Li
- Retinal Neurophysiology Section, National Eye Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Mengqing Xiang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Rong Ju
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Zhi Xie
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.,Center for Precision Medicine, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
30
|
Yin A, Feng M, Zhang L, Cheng Z, Li Y, Qian L. Identification of a novel native peptide derived from 60S ribosomal protein L23a that translationally regulates p53 to reduce myocardial ischemia-reperfusion. Pharmacol Res 2022; 175:105988. [PMID: 34808368 DOI: 10.1016/j.phrs.2021.105988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/22/2021] [Accepted: 11/11/2021] [Indexed: 11/22/2022]
Abstract
Myocardial ischemia-reperfusion (I/R) is a severe disease,but its underlying mechanism is not fully elucidated and no effective clinical treatment is available. Utilizing intracellular peptidomics, we identified a novel native peptide PDRL23A (Peptide Derived from RPL23A), that is intimately related to hypoxic stress. We further show that PDRL23A effectively alleviates hypoxia-induced cardiomyocyte injury in vitro, along with improvements in mitochondrial function and redox homeostasis, including ROS accumulation, oxidative phosphorylation, and mitochondrial membrane potential. Strikingly, the in vivo results indicate that, short-term pretreatment with PDRL23A could effectively inhibit I/R-induced cardiomyocyte death, myocardial fibrosis and decreased cardiac function. Interestingly, PDRL23A was found to interact with 60 S ribosomal protein L26 (RPL26), hampering RPL26-governed p53 translation, and resulting in a reduction in the level of p53 protein, which in turn reduced p53-mediated apoptosis under hypoxic conditions. Collectively, a native peptide, PDRL23A, which translationally regulates p53 to protect against myocardial I/R injury, has been identified for the first time. Our findings provide insight into the adaptive mechanisms of hypoxia and present a potential new treatment for myocardial I/R.
Collapse
Affiliation(s)
- Anwen Yin
- Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, China
| | - Mengwen Feng
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Li Zhang
- Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, China
| | - Zijie Cheng
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yun Li
- Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, China.
| | - Lingmei Qian
- Hongqiao International Institute of Medicine, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200336, China; Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| |
Collapse
|
31
|
Yi YW, You KS, Park JS, Lee SG, Seong YS. Ribosomal Protein S6: A Potential Therapeutic Target against Cancer? Int J Mol Sci 2021; 23:ijms23010048. [PMID: 35008473 PMCID: PMC8744729 DOI: 10.3390/ijms23010048] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
Ribosomal protein S6 (RPS6) is a component of the 40S small ribosomal subunit and participates in the control of mRNA translation. Additionally, phospho (p)-RPS6 has been recognized as a surrogate marker for the activated PI3K/AKT/mTORC1 pathway, which occurs in many cancer types. However, downstream mechanisms regulated by RPS6 or p-RPS remains elusive, and the therapeutic implication of RPS6 is underappreciated despite an approximately half a century history of research on this protein. In addition, substantial evidence from RPS6 knockdown experiments suggests the potential role of RPS6 in maintaining cancer cell proliferation. This motivates us to investigate the current knowledge of RPS6 functions in cancer. In this review article, we reviewed the current information about the transcriptional regulation, upstream regulators, and extra-ribosomal roles of RPS6, with a focus on its involvement in cancer. We also discussed the therapeutic potential of RPS6 in cancer.
Collapse
Affiliation(s)
- Yong Weon Yi
- Department of Biochemistry, College of Medicine, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea; (Y.W.Y.); (K.S.Y.); (J.-S.P.)
- Department of Nanobiomedical Science, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea
| | - Kyu Sic You
- Department of Biochemistry, College of Medicine, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea; (Y.W.Y.); (K.S.Y.); (J.-S.P.)
- Graduate School of Convergence Medical Science, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea
| | - Jeong-Soo Park
- Department of Biochemistry, College of Medicine, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea; (Y.W.Y.); (K.S.Y.); (J.-S.P.)
| | - Seok-Geun Lee
- Graduate School, Kyung Hee University, Seoul 02447, Korea
- Correspondence: (S.-G.L.); (Y.-S.S.); Tel.: +82-2-961-2355 (S.-G.L.); +82-41-550-3875 (Y.-S.S.); Fax: +82-2-961-9623 (S.-G.L.)
| | - Yeon-Sun Seong
- Department of Biochemistry, College of Medicine, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea; (Y.W.Y.); (K.S.Y.); (J.-S.P.)
- Graduate School of Convergence Medical Science, Dankook University, Cheonan 31116, Chungcheongnam-do, Korea
- Correspondence: (S.-G.L.); (Y.-S.S.); Tel.: +82-2-961-2355 (S.-G.L.); +82-41-550-3875 (Y.-S.S.); Fax: +82-2-961-9623 (S.-G.L.)
| |
Collapse
|
32
|
Hu T, Shen L, Huang Q, Wu C, Zhang H, Zeng Q, Wang G, Wei S, Zhang S, Zhang J, Khan NU, Shen X, Luo P. Protective Effect of Dictyophora Polysaccharides on Sodium Arsenite-Induced Hepatotoxicity: A Proteomics Study. Front Pharmacol 2021; 12:749035. [PMID: 34899304 PMCID: PMC8660860 DOI: 10.3389/fphar.2021.749035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/07/2021] [Indexed: 11/13/2022] Open
Abstract
The purpose of this study is to understand the mechanism of sodium arsenite (NaAsO2)-induced apoptosis of L-02 human hepatic cells, and how Dictyophora polysaccharide (DIP) protects L-02 cells from arsenic-induced apoptosis. The results revealed that DIP pretreatment inhibited NaAsO2 induced L-02 cells apoptosis by increasing anti-apoptotic Bcl-2 expression and decreasing pro-apoptotic Bax expression. Proteomic analysis showed that arsenic treatment disrupted the expression of metabolism and apoptosis associated proteins, including ribosomal proteins (RPs). After pretreatment with DIP, the expression levels of these proteins were reversed or restored. For the first time, it was observed that the significant decrease of cytoplasmic RPs and the increase of mitochondrial RPs were related to human normal cell apoptosis induced by arsenic. This is also the first report that the protective effect of DIP on cells was related to RPs. The results highlight the relationship between RPs and apoptosis, as well as the relationship between RPs and DIP attenuating arsenic-induced apoptosis.
Collapse
Affiliation(s)
- Ting Hu
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China.,School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China
| | - Liming Shen
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Qun Huang
- School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China
| | - Changyan Wu
- School of Public Health, Guizhou Medical University, Guiyang, China
| | - Huajie Zhang
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Qibing Zeng
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China.,School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China
| | - Guoze Wang
- School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China
| | - Shaofeng Wei
- School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China
| | - Shuling Zhang
- School of Public Health, Guizhou Medical University, Guiyang, China
| | - Jun Zhang
- School of Public Health, Guizhou Medical University, Guiyang, China
| | - Naseer Ullah Khan
- Shenzhen Key Laboratory of Marine Biotechnology and Ecology, College of Life Science and Oceanography, Shenzhen University, Shenzhen, China
| | - Xiangchun Shen
- Key Laboratory of Optimal Utilization of Natural Medicine Resources, School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang, China
| | - Peng Luo
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China.,School of Public Health, Guizhou Medical University, Guiyang, China.,Guizhou Provincial Engineering Research Center of Food Nutrition and Health, Guiyang, China.,State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang, China
| |
Collapse
|
33
|
Zhang C, Huang R, Ma X, Chen J, Han X, Li L, Luo L, Ruan H, Huang H. The Ribosome Biogenesis Factor Ltv1 Is Essential for Digestive Organ Development and Definitive Hematopoiesis in Zebrafish. Front Cell Dev Biol 2021; 9:704730. [PMID: 34692673 PMCID: PMC8528963 DOI: 10.3389/fcell.2021.704730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 09/13/2021] [Indexed: 11/13/2022] Open
Abstract
Ribosome biogenesis is a fundamental activity in cells. Ribosomal dysfunction underlies a category of diseases called ribosomopathies in humans. The symptomatic characteristics of ribosomopathies often include abnormalities in craniofacial skeletons, digestive organs, and hematopoiesis. Consistently, disruptions of ribosome biogenesis in animals are deleterious to embryonic development with hypoplasia of digestive organs and/or impaired hematopoiesis. In this study, ltv1, a gene involved in the small ribosomal subunit assembly, was knocked out in zebrafish by clustered regularly interspaced short palindromic repeats (CRISPRs)/CRISPR associated protein 9 (Cas9) technology. The recessive lethal mutation resulted in disrupted ribosome biogenesis, and ltv1 Δ14/Δ14 embryos displayed hypoplastic craniofacial cartilage, digestive organs, and hematopoiesis. In addition, we showed that the impaired cell proliferation, instead of apoptosis, led to the defects in exocrine pancreas and hematopoietic stem and progenitor cells (HSPCs) in ltv1 Δ14/Δ14 embryos. It was reported that loss of function of genes associated with ribosome biogenesis often caused phenotypes in a P53-dependent manner. In ltv1 Δ14/Δ14 embryos, both P53 protein level and the expression of p53 target genes, Δ113p53 and p21, were upregulated. However, knockdown of p53 failed to rescue the phenotypes in ltv1 Δ14/Δ14 larvae. Taken together, our data demonstrate that LTV1 ribosome biogenesis factor (Ltv1) plays an essential role in digestive organs and hematopoiesis development in zebrafish in a P53-independent manner.
Collapse
Affiliation(s)
- Chong Zhang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Rui Huang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Xirui Ma
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Jiehui Chen
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Xinlu Han
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Li Li
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Lingfei Luo
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Hua Ruan
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| | - Honghui Huang
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, State Key Laboratory Breeding Base of Eco-Environments and Bio-Resources of the Three Gorges Reservoir Region, School of Life Sciences, Southwest University, Chongqing, China
| |
Collapse
|
34
|
Loh D, Reiter RJ. Melatonin: Regulation of Biomolecular Condensates in Neurodegenerative Disorders. Antioxidants (Basel) 2021; 10:1483. [PMID: 34573116 PMCID: PMC8465482 DOI: 10.3390/antiox10091483] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 12/12/2022] Open
Abstract
Biomolecular condensates are membraneless organelles (MLOs) that form dynamic, chemically distinct subcellular compartments organizing macromolecules such as proteins, RNA, and DNA in unicellular prokaryotic bacteria and complex eukaryotic cells. Separated from surrounding environments, MLOs in the nucleoplasm, cytoplasm, and mitochondria assemble by liquid-liquid phase separation (LLPS) into transient, non-static, liquid-like droplets that regulate essential molecular functions. LLPS is primarily controlled by post-translational modifications (PTMs) that fine-tune the balance between attractive and repulsive charge states and/or binding motifs of proteins. Aberrant phase separation due to dysregulated membrane lipid rafts and/or PTMs, as well as the absence of adequate hydrotropic small molecules such as ATP, or the presence of specific RNA proteins can cause pathological protein aggregation in neurodegenerative disorders. Melatonin may exert a dominant influence over phase separation in biomolecular condensates by optimizing membrane and MLO interdependent reactions through stabilizing lipid raft domains, reducing line tension, and maintaining negative membrane curvature and fluidity. As a potent antioxidant, melatonin protects cardiolipin and other membrane lipids from peroxidation cascades, supporting protein trafficking, signaling, ion channel activities, and ATPase functionality during condensate coacervation or dissolution. Melatonin may even control condensate LLPS through PTM and balance mRNA- and RNA-binding protein composition by regulating N6-methyladenosine (m6A) modifications. There is currently a lack of pharmaceuticals targeting neurodegenerative disorders via the regulation of phase separation. The potential of melatonin in the modulation of biomolecular condensate in the attenuation of aberrant condensate aggregation in neurodegenerative disorders is discussed in this review.
Collapse
Affiliation(s)
- Doris Loh
- Independent Researcher, Marble Falls, TX 78654, USA
| | - Russel J. Reiter
- Department of Cellular and Structural Biology, UT Health Science Center, San Antonio, TX 78229, USA
| |
Collapse
|
35
|
Zhu L, Wang H, Yuhan J, Zhang B, Li H, Asakiya C, Huang K, He X, Xu W. Exosomes mediated the delivery of ochratoxin A-induced cytotoxicity in HEK293 cells. Toxicology 2021; 461:152926. [PMID: 34481902 DOI: 10.1016/j.tox.2021.152926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/23/2021] [Accepted: 09/01/2021] [Indexed: 10/20/2022]
Abstract
Ochratoxin A (OTA) is one of the mycotoxins, which widely pollutes food systems and seriously threatens human health. OTA's target organ is the kidney. Exosome, as one of the extracellular vesicles, could be secreted by all kinds of cells. It contains different proteins, nucleic acid, and lipid, which are decided by their donor cells and could be uptake by the recipient cells, release their contents, and affect the recipient cell's life activity. In this study, a 24 h-treatment with 5 μM OTA was found to significantly reduce the cell viability of HEK293 cells and meanwhile to provide a sufficient quantity of exosomes, thus this concentration and time were selected for subsequent experiments. In addition, exosomes extracted by ultracentrifugation had higher purity, fewer impurities, and uniform morphology than that by the ExoQuick-TC kit. Furthermore, these exosomes increased ROS levels and decreased mitochondrial membrane potential in HEK293 cells. By RNA-seq, the cytotoxicity mechanisms induced by OTA-treated HEK293 cell-derived exosomes (EXO-OTA) and OTA were mainly the metabolism of proteins and the cell cycle respectively. Also, it proved that exosomes deliver partial OTA-induced cytotoxicity.
Collapse
Affiliation(s)
- Liye Zhu
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083, China; College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Haomiao Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Jieyu Yuhan
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Boyang Zhang
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083, China; College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Hongyu Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Charles Asakiya
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Kunlun Huang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Xiaoyun He
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, 100083, China
| | - Wentao Xu
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083, China.
| |
Collapse
|
36
|
Kang J, Brajanovski N, Chan KT, Xuan J, Pearson RB, Sanij E. Ribosomal proteins and human diseases: molecular mechanisms and targeted therapy. Signal Transduct Target Ther 2021; 6:323. [PMID: 34462428 PMCID: PMC8405630 DOI: 10.1038/s41392-021-00728-8] [Citation(s) in RCA: 125] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 07/12/2021] [Accepted: 07/30/2021] [Indexed: 02/07/2023] Open
Abstract
Ribosome biogenesis and protein synthesis are fundamental rate-limiting steps for cell growth and proliferation. The ribosomal proteins (RPs), comprising the structural parts of the ribosome, are essential for ribosome assembly and function. In addition to their canonical ribosomal functions, multiple RPs have extra-ribosomal functions including activation of p53-dependent or p53-independent pathways in response to stress, resulting in cell cycle arrest and apoptosis. Defects in ribosome biogenesis, translation, and the functions of individual RPs, including mutations in RPs have been linked to a diverse range of human congenital disorders termed ribosomopathies. Ribosomopathies are characterized by tissue-specific phenotypic abnormalities and higher cancer risk later in life. Recent discoveries of somatic mutations in RPs in multiple tumor types reinforce the connections between ribosomal defects and cancer. In this article, we review the most recent advances in understanding the molecular consequences of RP mutations and ribosomal defects in ribosomopathies and cancer. We particularly discuss the molecular basis of the transition from hypo- to hyper-proliferation in ribosomopathies with elevated cancer risk, a paradox termed "Dameshek's riddle." Furthermore, we review the current treatments for ribosomopathies and prospective therapies targeting ribosomal defects. We also highlight recent advances in ribosome stress-based cancer therapeutics. Importantly, insights into the mechanisms of resistance to therapies targeting ribosome biogenesis bring new perspectives into the molecular basis of cancer susceptibility in ribosomopathies and new clinical implications for cancer therapy.
Collapse
Affiliation(s)
- Jian Kang
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Natalie Brajanovski
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia
| | - Keefe T. Chan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Jiachen Xuan
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia
| | - Richard B. Pearson
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1002.30000 0004 1936 7857Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, VIC Australia
| | - Elaine Sanij
- grid.1055.10000000403978434Division of Cancer Research, Peter MacCallum Cancer Centre, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XSir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC Australia ,grid.1008.90000 0001 2179 088XDepartment of Clinical Pathology, University of Melbourne, Melbourne, VIC Australia ,grid.1073.50000 0004 0626 201XSt. Vincent’s Institute of Medical Research, Fitzroy, VIC Australia
| |
Collapse
|
37
|
Nguyen D, Yang K, Chiao L, Deng Y, Zhou X, Zhang Z, Zeng SX, Lu H. Inhibition of tumor suppressor p73 by nerve growth factor receptor via chaperone-mediated autophagy. J Mol Cell Biol 2021; 12:700-712. [PMID: 32285119 PMCID: PMC7749740 DOI: 10.1093/jmcb/mjaa017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/06/2019] [Accepted: 01/13/2020] [Indexed: 01/08/2023] Open
Abstract
The tumor suppressr p73 is a homolog of p53 and is capable of inducing cell cycle arrest and apoptosis. Here, we identify nerve growth factor receptor (NGFR, p75NTR, or CD271) as a novel negative p73 regulator. p73 activates NGFR transcription, which, in turn, promotes p73 degradation in a negative feedback loop. NGFR directly binds to p73 central DNA-binding domain and suppresses p73 transcriptional activity as well as p73-mediated apoptosis in cancer cells. Surprisingly, we uncover a previously unknown mechanism of NGFR-facilitated p73 degradation through the chaperone-mediated autophagy (CMA) pathway. Collectively, our studies demonstrate a new oncogenic function for NGFR in inactivating p73 activity by promoting its degradation through the CMA.
Collapse
Affiliation(s)
- Daniel Nguyen
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Kun Yang
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Lucia Chiao
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA.,Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yun Deng
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA.,Department of Radiation Oncology, Shanghai Cancer Center, Fudan University, Shanghai 200032, China
| | - Xiang Zhou
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA.,Institute of Biomedical Sciences, Shanghai Cancer Center, Fudan University, Shanghai 200032, China
| | - Zhen Zhang
- Department of Radiation Oncology, Shanghai Cancer Center, Department of Oncology, Shanghai Medical School, Fudan University, Shanghai 200032, China
| | - Shelya X Zeng
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Hua Lu
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA 70112, USA
| |
Collapse
|
38
|
Hao Q, Li J, Zhang Q, Xu F, Xie B, Lu H, Wu X, Zhou X. Single-cell transcriptomes reveal heterogeneity of high-grade serous ovarian carcinoma. Clin Transl Med 2021; 11:e500. [PMID: 34459128 PMCID: PMC8335963 DOI: 10.1002/ctm2.500] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 06/27/2021] [Accepted: 07/01/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND High-grade serous ovarian carcinoma (HGSOC) is the most common and aggressive histotype of epithelial ovarian cancer. The heterogeneity and molecular basis of this disease remain incompletely understood. METHODS To address this question, we have performed a single-cell transcriptomics analysis of matched primary and metastatic HGSOC samples. RESULTS A total of 13 571 cells are categorized into six distinct cell types, including epithelial cells, fibroblast cells, T cells, B cells, macrophages, and endothelial cells. A subset of aggressive epithelial cells with hyperproliferative and drug-resistant potentials is identified. Several new markers that are highly expressed in epithelial cells are characterized, and their roles in ovarian cancer cell growth and migration are further confirmed. Dysregulation of multiple signaling pathways, including the translational machinery, is associated with ovarian cancer metastasis through the trajectory analysis. Moreover, single-cell regulatory network inference and clustering (SCENIC) analysis reveals the gene regulatory networks and suggests the JUN signaling pathway as a potential therapeutic target for treatment of ovarian cancer, which is validated using the JUN/AP-1 inhibitor T-5224. Finally, our study depicts the epithelial-fibroblast cell communication atlas and identifies several important receptor-ligand complexes in ovarian cancer development. CONCLUSIONS This study uncovers new molecular features and the potential therapeutic target of HGSOC, which would advance the understanding and treatment of the disease.
Collapse
Affiliation(s)
- Qian Hao
- Fudan University Shanghai Cancer Center and Institutes of Biomedical SciencesFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
| | - Jiajia Li
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer CenterFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
| | - Qinghua Zhang
- Fudan University Shanghai Cancer Center and Institutes of Biomedical SciencesFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
| | - Fei Xu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer CenterFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
| | - Bangxiang Xie
- Beijing YouAn Hospital, Capital Medical UniversityBeijing Institute of HepatologyBeijingChina
| | - Hua Lu
- Department of Biochemistry & Molecular Biology and Tulane Cancer CenterTulane University School of MedicineNew OrleansLouisiana
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer CenterFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
| | - Xiang Zhou
- Fudan University Shanghai Cancer Center and Institutes of Biomedical SciencesFudan UniversityShanghaiChina
- Department of Oncology, Shanghai Medical CollegeFudan UniversityShanghaiChina
- Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer CenterFudan UniversityShanghaiChina
- Shanghai Key Laboratory of Medical Epigenetics, International Co‐laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical SciencesFudan UniversityShanghaiChina
| |
Collapse
|
39
|
Sun Z, Yu H, Zhao J, Tan T, Pan H, Zhu Y, Chen L, Zhang C, Zhang L, Lei A, Xu Y, Bi X, Huang X, Gao B, Wang L, Correia C, Chen M, Sun Q, Feng Y, Shen L, Wu H, Wang J, Shen X, Daley GQ, Li H, Zhang J. LIN28 coordinately promotes nucleolar/ribosomal functions and represses the 2C-like transcriptional program in pluripotent stem cells. Protein Cell 2021; 13:490-512. [PMID: 34331666 PMCID: PMC9226220 DOI: 10.1007/s13238-021-00864-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 06/15/2021] [Indexed: 01/21/2023] Open
Abstract
LIN28 is an RNA binding protein with important roles in early embryo development, stem cell differentiation/reprogramming, tumorigenesis and metabolism. Previous studies have focused mainly on its role in the cytosol where it interacts with Let-7 microRNA precursors or mRNAs, and few have addressed LIN28's role within the nucleus. Here, we show that LIN28 displays dynamic temporal and spatial expression during murine embryo development. Maternal LIN28 expression drops upon exit from the 2-cell stage, and zygotic LIN28 protein is induced at the forming nucleolus during 4-cell to blastocyst stage development, to become dominantly expressed in the cytosol after implantation. In cultured pluripotent stem cells (PSCs), loss of LIN28 led to nucleolar stress and activation of a 2-cell/4-cell-like transcriptional program characterized by the expression of endogenous retrovirus genes. Mechanistically, LIN28 binds to small nucleolar RNAs and rRNA to maintain nucleolar integrity, and its loss leads to nucleolar phase separation defects, ribosomal stress and activation of P53 which in turn binds to and activates 2C transcription factor Dux. LIN28 also resides in a complex containing the nucleolar factor Nucleolin (NCL) and the transcriptional repressor TRIM28, and LIN28 loss leads to reduced occupancy of the NCL/TRIM28 complex on the Dux and rDNA loci, and thus de-repressed Dux and reduced rRNA expression. Lin28 knockout cells with nucleolar stress are more likely to assume a slowly cycling, translationally inert and anabolically inactive state, which is a part of previously unappreciated 2C-like transcriptional program. These findings elucidate novel roles for nucleolar LIN28 in PSCs, and a new mechanism linking 2C program and nucleolar functions in PSCs and early embryo development.
Collapse
Affiliation(s)
- Zhen Sun
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Hua Yu
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jing Zhao
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Tianyu Tan
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Hongru Pan
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yuqing Zhu
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Lang Chen
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Cheng Zhang
- Department of Molecular Pharmacology & Experimental Therapeutics, Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Li Zhang
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Anhua Lei
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yuyan Xu
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Xianju Bi
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100085, China
| | - Xin Huang
- The Black Family Stem Cell Institute and Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Bo Gao
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Longfei Wang
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
- Stem Cell Transplantation Program, Division of Pediatric Hematology Oncology, Boston Children's Hospital, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Cristina Correia
- Department of Molecular Pharmacology & Experimental Therapeutics, Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Ming Chen
- College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Qiming Sun
- Department of Biochemistry, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yu Feng
- Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Li Shen
- Institute of Life Science, Zhejiang University, Hangzhou, 310058, China
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, and Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Jianlong Wang
- The Black Family Stem Cell Institute and Department of Cell, Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Xiaohua Shen
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, 100085, China
| | - George Q Daley
- Stem Cell Transplantation Program, Division of Pediatric Hematology Oncology, Boston Children's Hospital, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Hu Li
- Department of Molecular Pharmacology & Experimental Therapeutics, Center for Individualized Medicine, Mayo Clinic, Rochester, MN, USA
| | - Jin Zhang
- Center for Stem Cell and Regenerative Medicine, Department of Basic Medical Sciences and the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China.
- Institute of Hematology, Zhejiang University, Hangzhou, 310058, China.
- Zhejiang Laboratory for Systems and Precision Medicine, Zhejiang University Medical Center, Hangzhou, 310058, China.
| |
Collapse
|
40
|
Liao H, Gaur A, Mauvais C, Denicourt C. p53 induces a survival transcriptional response after nucleolar stress. Mol Biol Cell 2021; 32:ar3. [PMID: 34319761 PMCID: PMC8684752 DOI: 10.1091/mbc.e21-05-0251] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Accumulating evidence indicates that increased ribosome biogenesis is a hallmark of cancer. It is well established that inhibition of any steps of ribosome biogenesis induces nucleolar stress characterized by p53 activation and subsequent cell cycle arrest and/or cell death. However, cells derived from solid tumors have demonstrated different degrees of sensitivity to ribosome biogenesis inhibition, where cytostatic effects rather than apoptosis are observed. The reason for this is not clear, and the p53-specific transcriptional program induced after nucleolar stress has not been previously investigated. Here we demonstrate that blocking rRNA synthesis by depletion of essential rRNA processing factors such as LAS1L, PELP1, and NOP2 or by inhibition of RNA Pol I with the specific small molecule inhibitor CX-5461, mainly induce cell cycle arrest accompanied by autophagy in solid tumor–derived cell lines. Using gene expression analysis, we find that p53 orchestrates a transcriptional program involved in promoting metabolic remodeling and autophagy to help cells survive under nucleolar stress. Importantly, our study demonstrates that blocking autophagy significantly sensitizes cancer cells to RNA Pol I inhibition by CX-5461, suggesting that interfering with autophagy should be considered a strategy to heighten the responsiveness of ribosome biogenesis–targeted therapies in p53-positive tumors.
Collapse
Affiliation(s)
- Han Liao
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center, Houston, Texas, United States of America
| | - Anushri Gaur
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center, Houston, Texas, United States of America
| | - Claire Mauvais
- Current address: UT Southwestern Medical Center, Dallas, Texas, United States of America
| | - Catherine Denicourt
- Department of Integrative Biology and Pharmacology, The University of Texas Health Science Center, Houston, Texas, United States of America
| |
Collapse
|
41
|
Jaufmann J, Franke FC, Sperlich A, Blumendeller C, Kloos I, Schneider B, Sasaki D, Janssen KP, Beer-Hammer S. The emerging and diverse roles of the SLy/SASH1-protein family in health and disease-Overview of three multifunctional proteins. FASEB J 2021; 35:e21470. [PMID: 33710696 DOI: 10.1096/fj.202002495r] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/22/2021] [Accepted: 02/08/2021] [Indexed: 12/12/2022]
Abstract
Intracellular adaptor proteins are indispensable for the transduction of receptor-derived signals, as they recruit and connect essential downstream effectors. The SLy/SASH1-adaptor family comprises three highly homologous proteins, all of them sharing conserved structural motifs. The initial characterization of the first member SLy1/SASH3 (SH3 protein expressed in lymphocytes 1) in 2001 was rapidly followed by identification of SLy2/HACS1 (hematopoietic adaptor containing SH3 and SAM domains 1) and SASH1/SLy3 (SAM and SH3 domain containing 1). Based on their pronounced sequence similarity, they were subsequently classified as one family of intracellular scaffold proteins. Despite their obvious homology, the three SLy/SASH1-members fundamentally differ with regard to their expression and function in intracellular signaling. On the contrary, growing evidence clearly demonstrates an important role of all three proteins in human health and disease. In this review, we systematically summarize what is known about the SLy/SASH1-adaptors in the field of molecular cell biology and immunology. To this end, we recapitulate current research about SLy1/SASH3, SLy2/HACS1, and SASH1/SLy3, with an emphasis on their similarities and differences.
Collapse
Affiliation(s)
- Jennifer Jaufmann
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute of Experimental and Clinical Pharmacology and Pharmacogenomik and ICePhA, University of Tuebingen, Tuebingen, Germany
| | - Fabian Christoph Franke
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Andreas Sperlich
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Carolin Blumendeller
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute of Experimental and Clinical Pharmacology and Pharmacogenomik and ICePhA, University of Tuebingen, Tuebingen, Germany
| | - Isabel Kloos
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute of Experimental and Clinical Pharmacology and Pharmacogenomik and ICePhA, University of Tuebingen, Tuebingen, Germany
| | - Barbara Schneider
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute of Experimental and Clinical Pharmacology and Pharmacogenomik and ICePhA, University of Tuebingen, Tuebingen, Germany
| | - Daisuke Sasaki
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany.,Medical SC New Technology Strategy Office, General Research Institute, Nitto Boseki, Co., Ltd, Tokyo, Japan
| | - Klaus-Peter Janssen
- Department of Surgery, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Sandra Beer-Hammer
- Department of Pharmacology, Experimental Therapy and Toxicology, Institute of Experimental and Clinical Pharmacology and Pharmacogenomik and ICePhA, University of Tuebingen, Tuebingen, Germany
| |
Collapse
|
42
|
Abstract
The tumor suppressor p53 prevents tumorigenesis, while inactivation of p53 promotes cancer development and drug resistance. Here, we identify that a long noncoding RNA, the RNA component of mitochondrial RNA-processing endoribonuclease (RMRP), promotes growth and proliferation of colorectal cancer cells by inhibiting p53 activity. Mechanistically, RMRP retains SNRPA1 in the nucleus, thus preventing its lysosomal degradation. The nuclear SNRPA1 then prompts MDM2-mediated p53 ubiquitination and degradation. Remarkably, RMRP expression is induced by poly (ADP-ribose) polymerase (PARP) inhibitors, a group of targeted anticancer drugs, through the transcription factor C/EBPβ. Targeting RMRP significantly enhances sensitivity of colorectal cancer cells to PARP inhibition by reactivating p53. Our study provides a possible mechanism underling tumor resistance to PARP inhibitors. p53 inactivation is highly associated with tumorigenesis and drug resistance. Here, we identify a long noncoding RNA, the RNA component of mitochondrial RNA-processing endoribonuclease (RMRP), as an inhibitor of p53. RMRP is overexpressed and associated with an unfavorable prognosis in colorectal cancer. Ectopic RMRP suppresses p53 activity by promoting MDM2-induced p53 ubiquitination and degradation, while depletion of RMRP activates the p53 pathway. RMRP also promotes colorectal cancer growth and proliferation in a p53-dependent fashion in vitro and in vivo. This anti-p53 action of RMRP is executed through an identified partner protein, SNRPA1. RMRP can interact with SNRPA1 and sequester it in the nucleus, consequently blocking its lysosomal proteolysis via chaperone-mediated autophagy. The nuclear SNRPA1 then interacts with p53 and enhances MDM2-induced proteasomal degradation of p53. Remarkably, ablation of SNRPA1 completely abrogates RMRP regulation of p53 and tumor cell growth, indicating that SNRPA1 is indispensable for the anti-p53 function of RMRP. Interestingly and significantly, poly (ADP-ribose) polymerase (PARP) inhibitors induce RMRP expression through the transcription factor C/EBPβ, and RMRP confers tumor resistance to PARP inhibition by preventing p53 activation. Altogether, our study demonstrates that RMRP plays an oncogenic role by inactivating p53 via SNRPA1 in colorectal cancer.
Collapse
|
43
|
Ho DH, Nam D, Jeong S, Seo MK, Park SW, Seol W, Son I. Expression of transduced nucleolin promotes the clearance of accumulated α-synuclein in rodent cells and animal model. Neurobiol Dis 2021; 154:105349. [PMID: 33781924 DOI: 10.1016/j.nbd.2021.105349] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/23/2021] [Accepted: 03/24/2021] [Indexed: 02/07/2023] Open
Abstract
Alpha-synuclein (αSyn) is a major component of Lewy bodies, which are a known pathogenic marker of Parkinson's disease (PD). The dysfunction of protein degradation machinery causes αSyn accumulation. The reinforcement of αSyn degradation is a potential therapeutic target for PD because accumulated αSyn is responsible for the pathogenesis of PD. Nucleolin (NCL) is essential in the formation of the nucleolar structure. The function of NCL is correlated with oxidative stress-mediated cell death. A previous study demonstrated that NCL overexpression alleviated rotenone-induced neurotoxic effects, whereas knockdown of NCL had the opposite effect. These results suggest that NCL malfunction would exacerbate PD pathology. Thus, it was hypothesized that the introduction of ectopic NCL could rescue α-synucleinopathy in PD. This study investigated whether the ectopic expression of NCL facilitates αSyn clearance. Ectopic expression of NCL was accomplished via the transfection of green fluorescent protein (GFP) or GFP-NCL in mouse embryonic fibroblasts (MEF) or transduction of GFP or GFP-NCL using lentivirus in rat primary cortical neurons and mouse substantia nigra. NCL overexpression enhanced the clearance of accumulated or aggregated αSyn in MEFs and rat primary cortical neurons. The activity of the autophagy-lysosome pathway was enhanced by NCL expression. NCL transduction in the substantia nigra, which was co-injected with αSyn fibrils, rescued PD manifestation. The elevation of NCL levels may reflect a therapeutic strategy for α-synucleinopathy in PD.
Collapse
Affiliation(s)
- Dong Hwan Ho
- InAm Neuroscience Research Center, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea.
| | - Daleum Nam
- InAm Neuroscience Research Center, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea
| | - Soyeon Jeong
- InAm Neuroscience Research Center, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea
| | - Mi Kyoung Seo
- Paik Institute for Clinical Research, Inje University College of Medicine, Republic of Korea
| | - Sung Woo Park
- Paik Institute for Clinical Research, Inje University College of Medicine, Republic of Korea; Department of Health Science and Technology, Graduate School of Inje University, Busanjin-gu, Busan 47392, Republic of Korea
| | - Wongi Seol
- InAm Neuroscience Research Center, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea
| | - Ilhong Son
- InAm Neuroscience Research Center, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea; Department of Neurology, Sanbon Medical Center, Wonkwang University, Gunpo-si 15865, Gyeonggi-do, Republic of Korea.
| |
Collapse
|
44
|
Maheden K, Bashth OS, Shakiba N. Evening the playing field: microenvironmental control over stem cell competition during fate programming. Curr Opin Genet Dev 2021; 70:66-75. [PMID: 34153929 DOI: 10.1016/j.gde.2021.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 12/26/2022]
Abstract
Recent advancements in cellular engineering, including reprogramming of somatic cells into pluripotent stem cells, have opened the door to a new era of regenerative medicine. Given that cellular decisions are guided by microenvironmental cues, such as secreted factors and interactions with neighbouring cells, reproducible cell manufacturing requires robust control over cell-cell interactions. Cell competition has recently emerged as a previously unknown interaction that plays a significant role in shaping the growth and death dynamics of multicellular stem cell populations, both in vivo and in vitro. Although recent studies have largely focused on exploring how the differential expression of key genes mediate the competitive elimination of some cells, little is known about the impact of the microenvironment on cell competition, despite its critical role in shaping cell fate outcomes. Here, we explore recent findings that have brought cell competition into the spotlight, while dissecting the role of microenvironmental factors for controlling competition in cell fate programming applications.
Collapse
Affiliation(s)
- Kieran Maheden
- School of Biomedical Engineering, Faculty of Applied Science and Faculty of Medicine, University of British Columbia, Biomedical Research Centre, 2222 Health Sciences Mall, V6T 1Z3, Vancouver, Canada
| | - Omar S Bashth
- School of Biomedical Engineering, Faculty of Applied Science and Faculty of Medicine, University of British Columbia, Biomedical Research Centre, 2222 Health Sciences Mall, V6T 1Z3, Vancouver, Canada
| | - Nika Shakiba
- School of Biomedical Engineering, Faculty of Applied Science and Faculty of Medicine, University of British Columbia, Biomedical Research Centre, 2222 Health Sciences Mall, V6T 1Z3, Vancouver, Canada.
| |
Collapse
|
45
|
Su Z, Gu Y. Identification of key genes and pathways involved in abdominal aortic aneurysm initiation and progression. Vascular 2021; 30:639-649. [PMID: 34139912 DOI: 10.1177/17085381211026474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE The study aimed to assess the gene expression profile of biopsies obtained from the neck of human abdominal aortic aneurysm (AAA) and the main site of AAA dilatation and to investigate the molecular mechanism underlying the development of AAA. METHODS The microarray profile of GSE47472 and GSE57691 were obtained from the Gene Expression Omnibus (GEO) database. The GSE47472 was a microarray dataset of tissues from the aortic neck of AAA patients versus normal controls. The GSE57691 was a microarray dataset including the tissues from main site of AAA dilatation versus normal controls. Differentially expressed genes (DEGs) were chosen using the R package and annotated by Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomics (KEGG). The hub genes were identified in the protein-protein interaction (PPI) network. RESULTS 342 upregulated DEGs and 949 downregulated DEGs were obtained from GSE47472. The upregulated DEGs were mainly enriched in biological regulation (ontology: BP), the membrane (ontology: CC), and protein binding (ontology: MF), and the downregulated genes were mainly enriched in biological regulation (ontology: BP), the membrane (ontology: CC), and protein blinding (ontology: MF). In the KEGG enrichment analysis, the DEGs mainly involved glycosaminoglycan degradation, vasopressin-regulated water reabsorption, and pyruvate metabolism. The hub genes in GSE47472 mainly include VAMP8, PTPRC, DYNLL1, RPL38, RPS4X, HNRNPA1, PRMT1, TGOLN2, PA2G4, and CUL2. From GSE57691, 248 upregulated DEGs and 1120 downregulated DEGs were selected. The upregulated DEGs of GSE57691 were mainly enriched in biological regulation (ontology: BP), the membrane (ontology: CC), and protein binding (ontology: MF), and the downregulated genes were mainly enriched in metabolic process (ontology: BP), the membrane (ontology: CC), and protein blinding (ontology: MF). In the KEGG enrichment analysis, the DEGs mainly involved the mitochondrial respiratory, respiratory chain complex, and respiratory chain. RPS15A, RPS5, RPL23, RPL27A, RPS24, RPL35A, RPS4X, RPL7, RPS25, and RPL21 were identified as the hub genes. CONCLUSION At the early stage of AAA, the current study indicated the importance of glycosaminoglycan degradation and anaerobic metabolism. We also identified several hub genes closely related to AAA (VAMP8, PTPRC, DYNLL1, etc.). At the progression of the AAA, the dysfunctional mitochondria played a critical role in AAA formation and the RPS15A, RPS5, RPL23, etc., were identified as the hub genes.
Collapse
Affiliation(s)
- Zhixiang Su
- Department of Vascular Surgery, 71044Xuanwu Hospital, Capital Medical University, Beijing,China
| | - Yongquan Gu
- Department of Vascular Surgery, 71044Xuanwu Hospital, Capital Medical University, Beijing,China
| |
Collapse
|
46
|
Tsiambas E, Chrysovergis A, Papanikolaou V, Mastronikolis N, Ragos V, Batistatou A, Peschos D, Kavantzas N, Lazaris AC, Kyrodimos E. Impact of Ribosome Activity on SARS-CoV-2 LNP - Based mRNA Vaccines. Front Mol Biosci 2021; 8:654866. [PMID: 33959636 PMCID: PMC8093617 DOI: 10.3389/fmolb.2021.654866] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 03/26/2021] [Indexed: 12/12/2022] Open
Abstract
Coronavirus-related Severe Acute Respiratory Syndrome-2 (SARS-CoV-2) initially was detected in Wuhan, Hubei, China. Since early 2021, World Health Organization (WHO) has declared Coronavirus Disease 2019 (COVID-19) a pandemic due to rapidly transformed to a globally massive catastrophic viral infection. In order to confront this emergency situation, many pharmaceutical companies focused on the design and development of efficient vaccines that are considered necessary for providing a level of normalization in totally affected human social-economical activity worldwide. A variety of vaccine types are under development, validation or even some of them have already completed these stages, initially approved as conditional marketing authorisation by Food and Drug Administration (FDA), European Medicines Agency (EMA), and other national health authorities for commercial purposes (in vivo use in general population), accelerating their production and distribution process. Innovative nucleoside-modified viral messenger RNA (v-mRNA)-based vaccines encapsulated within nanoparticles-specifically lipid ones (LNPs)-are now well recognized. Although this is a promising genetic engineering topic in the field of nanopharmacogenomics or targeted nucleic vaccines, there are limited but continuously enriched in vivo data in depth of time regarding their safety, efficacy, and immune response. In the current paper we expand the limited published data in the field of ribosome machinery and SARS-CoV-2 mRNA fragment vaccines interaction by describing their functional specialization and modifications. Additionally, alterations in post-transcriptional/translational molecules and mechanisms that could potentially affect the interaction between target cells and vaccines are also presented. Understanding these mechanisms is a crucial step for the next generation v-mRNA vaccines development.
Collapse
Affiliation(s)
- Evangelos Tsiambas
- Department of Cytology, Molecular Unit, 417 Veterans Army Hospital (NIMTS), Athens, Greece
- Department of Pathology, Medical School, University of Ioannina, Ioannina, Greece
- Department of Maxillofacial, Medical School, University of Ioannina, Ioannina, Greece
| | - Aristeidis Chrysovergis
- 1st ENT Department, Hippocration Hospital, National and Kapodistrian University, Athens, Greece
| | - Vasileios Papanikolaou
- 1st ENT Department, Hippocration Hospital, National and Kapodistrian University, Athens, Greece
| | | | - Vasileios Ragos
- Department of Maxillofacial, Medical School, University of Ioannina, Ioannina, Greece
| | - Anna Batistatou
- Department of Pathology, Medical School, University of Ioannina, Ioannina, Greece
| | - Dimitrios Peschos
- Department of Physiology, Medical School, University of Ioannina, Ioannina, Greece
| | - Nikolaos Kavantzas
- Department of Pathology, Medical School, National and Kapodistrian University, Athens, Greece
| | - Andreas C. Lazaris
- Department of Pathology, Medical School, National and Kapodistrian University, Athens, Greece
| | - Efthimios Kyrodimos
- 1st ENT Department, Hippocration Hospital, National and Kapodistrian University, Athens, Greece
| |
Collapse
|
47
|
Ribosomal RNA Transcription Regulation in Breast Cancer. Genes (Basel) 2021; 12:genes12040502. [PMID: 33805424 PMCID: PMC8066022 DOI: 10.3390/genes12040502] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/26/2021] [Accepted: 03/29/2021] [Indexed: 12/24/2022] Open
Abstract
Ribosome biogenesis is a complex process that is responsible for the formation of ribosomes and ultimately global protein synthesis. The first step in this process is the synthesis of the ribosomal RNA in the nucleolus, transcribed by RNA Polymerase I. Historically, abnormal nucleolar structure is indicative of poor cancer prognoses. In recent years, it has been shown that ribosome biogenesis, and rDNA transcription in particular, is dysregulated in cancer cells. Coupled with advancements in screening technology that allowed for the discovery of novel drugs targeting RNA Polymerase I, this transcriptional machinery is an increasingly viable target for cancer therapies. In this review, we discuss ribosome biogenesis in breast cancer and the different cellular pathways involved. Moreover, we discuss current therapeutics that have been found to affect rDNA transcription and more novel drugs that target rDNA transcription machinery as a promising avenue for breast cancer treatment.
Collapse
|
48
|
Zhang Q, Sun L, Zhang Q, Zhang W, Tian W, Liu M, Wang Y. Construction of a disease-specific lncRNA-miRNA-mRNA regulatory network reveals potential regulatory axes and prognostic biomarkers for hepatocellular carcinoma. Cancer Med 2020; 9:9219-9235. [PMID: 33232580 PMCID: PMC7774738 DOI: 10.1002/cam4.3526] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/14/2020] [Accepted: 09/21/2020] [Indexed: 01/04/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is a heterogeneous malignancy with a high incidence and poor prognosis. Exploration of the underlying mechanisms and effective prognostic indicators is conducive to clinical management and optimization of treatment. The RNA‐seq and clinical phenotype data of HCC were retrieved from The Cancer Genome Atlas (TCGA), and differential expression analysis was performed. Then, a differential lncRNA‐miRNA‐mRNA regulatory network was constructed, and the key genes were further identified and validated. By integrating this network with the online tool‐based ceRNA network, an HCC‐specific ceRNA network was obtained, and lncRNA‐miRNA‐mRNA regulatory axes were extracted. RNAs associated with prognosis were further obtained, and multivariate Cox regression models were established to identify the prognostic signature and nomogram. As a result, 198 DElncRNAs, 120 DEmiRNAs, and 2827 DEmRNAs were identified, and 30 key genes identified from the differential network were enriched in four cancer‐related pathways. Four HCC‐specific lncRNA‐miRNA‐mRNA regulatory axes were extracted, and SNHG11, CRNDE, MYLK‐AS1, E2F3, and CHEK1 were found to be related with HCC prognosis. Multivariate Cox regression analysis identified a prognostic signature, comprised of CRNDE, MYLK‐AS1, and CHEK1, for overall survival (OS) of HCC. A nomogram comprising the prognostic signature and pathological stage was established and showed some net clinical benefits. The AUC of the prognostic signature and nomogram for 1‐year, 3‐year, and 5‐year survival was 0.777 (0.657‐0.865), 0.722 (0.640‐0.848), and 0.630 (0.528‐0.823), and 0.751 (0.664‐0.870), 0.773 (0.707‐0.849), and 0.734 (0.638‐0.845), respectively. These results provided clues for the study of potential biomarkers and therapeutic targets for HCC. In addition, the obtained 30 key genes and 4 regulatory axes might also help elucidate the underlying mechanism of HCC.
Collapse
Affiliation(s)
- Qi Zhang
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Lin Sun
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Qiuju Zhang
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Wei Zhang
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Wei Tian
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Meina Liu
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yupeng Wang
- Department of Biostatistics, Harbin Medical University, Harbin, Heilongjiang, China
| |
Collapse
|
49
|
Dannheisig DP, Bächle J, Tasic J, Keil M, Pfister AS. The Wnt/β-Catenin Pathway is Activated as a Novel Nucleolar Stress Response. J Mol Biol 2020; 433:166719. [PMID: 33221336 DOI: 10.1016/j.jmb.2020.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/10/2020] [Accepted: 11/16/2020] [Indexed: 12/21/2022]
Abstract
Ribosomes are mandatory for growth and survival. The complex process of ribosome biogenesis is located in nucleoli and requires action of the RNA polymerases I-III, together with a multitude of processing factors involved in rRNA cleavage and maturation. Impaired ribosome biogenesis and loss of nucleolar integrity triggers nucleolar stress, which classically stabilizes the tumor suppressor p53 and induces cell cycle arrest and apoptosis. Nucleolar stress is implemented in modern anti-cancer therapies, however, also emerges as contributor to diverse pathological conditions. These include ribosomopathies, such as the Shwachman Bodian Diamond Syndrome (SBDS), which are not only characterized by nucleolar stress, but paradoxically also increased cancer incidence. Wnt signaling is tightly coupled to cell proliferation and is constitutively activated in various tumor types. In addition, the Wnt/β-Catenin pathway regulates ribosome formation. Here, we demonstrate that induction of nucleolar stress by different strategies stimulates the Wnt/β-Catenin pathway. We show that depletion of the key ribosomopathy factor SBDS, or the nucleolar factors Nucleophosmin (NPM), Pescadillo 1 (PES1) or Peter Pan (PPAN) by si RNA-mediated knockdown or CRISPR/Cas9 strategy activates Wnt/β-Catenin signaling in a β-Catenin-dependent manner and stabilizes β-Catenin in human cancer cells. Moreover, triggering nucleolar stress by the chemotherapeutic agents Actinomycin D or the RNA polymerase I inhibitor CX-5461 stimulates expression of Wnt/β-Catenin targets, which is followed by the p53 target CDKN1A (p21). As PPAN expression is induced by Wnt/β-Catenin signaling, our data establish a novel feedback mechanism and reveal that nucleolar stress over-activates the Wnt/β-Catenin pathway, which most likely serves as compensatory mechanism to sustain ribosome biogenesis.
Collapse
Affiliation(s)
- David P Dannheisig
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
| | - Jana Bächle
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
| | - Jasmin Tasic
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
| | - Marina Keil
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
| | - Astrid S Pfister
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany.
| |
Collapse
|
50
|
Caggiano C, Guida E, Todaro F, Bielli P, Mori M, Ghirga F, Quaglio D, Botta B, Moretti F, Grimaldi P, Rossi P, Jannini EA, Barchi M, Dolci S. Sempervirine inhibits RNA polymerase I transcription independently from p53 in tumor cells. Cell Death Discov 2020; 6:111. [PMID: 33298840 PMCID: PMC7595235 DOI: 10.1038/s41420-020-00345-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/05/2020] [Indexed: 12/18/2022] Open
Abstract
In the search of small molecules that can target MDM2/p53 pathway in testicular germ cell tumors (TGCTs), we identified sempervirine (2,3,4,13-tetrahydro-1H-benz[g]indolo[2,3-a]quinolizin-6-ium), an alkaloid of Gelsemium sempervirens, that has been previously proposed as an inhibitor of MDM2 that targets p53-wildtype (wt) tumor cells. We found that sempervirine not only affects cell growth of p53-wt cancer cells, but it is also active in p53-mutated and p53-null cells by triggering p53-dependent and independent pathways without affecting non-transformed cells. To understand which mechanism/s could be activated both in p53-wt and -null cells, we found that sempervirine induced nucleolar remodeling and nucleolar stress by reducing protein stability of RPA194, the catalytic subunit of RNA polymerase I, that led to rRNA synthesis inhibition and to MDM2 block. As shown for other cancer cell models, MDM2 inhibition by nucleolar stress downregulated E2F1 protein levels both in p53-wt and p53-null TGCT cells with the concomitant upregulation of unphosphorylated pRb. Finally, we show that sempervirine is able to enter the nucleus and accumulates within the nucleolus where it binds rRNA without causing DNA damage. Our results identify semperivirine as a novel rRNA synthesis inhibitor and indicate this drug as a non-genotoxic anticancer small molecule.
Collapse
Affiliation(s)
- Cinzia Caggiano
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Eugenia Guida
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Federica Todaro
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Pamela Bielli
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Mattia Mori
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy
| | - Francesca Ghirga
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy
| | - Deborah Quaglio
- Department of Chemistry and Drug Technology, University of Rome La Sapienza, Rome, Italy
| | - Bruno Botta
- Department of Chemistry and Drug Technology, University of Rome La Sapienza, Rome, Italy
| | - Fabiola Moretti
- Institute of Cell Biology and Neurobiology, National Research Council of Italy (CNR), Rome, Italy
| | - Paola Grimaldi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | - Pellegrino Rossi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy
| | | | - Marco Barchi
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy.
| | - Susanna Dolci
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy.
| |
Collapse
|