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Xu M, Shi R, Yang J, Chen H, Liu S, Yu S, Li S, He W, Sy MS, Lu M, Zhang H, Li C. Collagen prolyl 4-hydroxylase subunit α member-induced head and neck squamous cell carcinoma aggressiveness is antagonized by LLGL2 via reduced expression of occludin. Acta Biochim Biophys Sin (Shanghai) 2024. [PMID: 39394821 DOI: 10.3724/abbs.2024140] [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: 10/14/2024] Open
Abstract
There are three isoforms of human collagen prolyl 4-hydroxylases (C-P4Hs), each of which has been reported to play an important role in regulating the progression of a variety of human cancers. By analyzing TGCA datasets on human head and neck squamous cell carcinoma (HNSC), we find that a higher expression of all three C-P4HAs (the α subunit of C-P4Hs) is a superior prognostic indicator than a higher expression of two or a single C-P4HA. Unexpectedly, some patients with higher levels of three C-P4HAs survive longer than patients whose tumors have lower expression of C-P4HAs. Therefore, there may be molecule(s) that can negate the deleterious effects of overexpressing C-P4HAs during cancer progression. By constructing a functional protein interaction network of C-P4HAs and analyzing molecules whose expressions are correlated significantly with that of C-P4HAs, we identify scribble cell polarity complex component 2 (LLGL2) as a factor that antagonizes the effects of overexpressed C-P4HAs on HNSC. Silencing of LLGL2 in the human oral squamous cell line Cal-27 upregulates the expression of occludin and increases cancer cell invasion and migration. In contrast, knocking down C-P4HA alone inhibits cell migration and invasion. Furthermore, simultaneously downregulating three C-P4HAs has more pronounced effects on inhibiting cell migration and invasion. Accordingly, high LLGL2 expression is also a marker indicating improved prognosis in patients with HNSC. These results suggest that the interplay between LLGL2 and C-P4HAs may be targeted to mitigate HNSC tumorigenesis and progression.
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Affiliation(s)
- Miao Xu
- Hunan Province Key Laboratory of Tumor Cellular & Molecular Pathology, Cancer Research Institute, School of Basic Medical Sciences, University of South China, Hengyang 421001, China
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Run Shi
- School of Medicine, Pingdingshan University, Pingdingshan 467000, China
| | - Jie Yang
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Heng Chen
- Guangzhou Institute of Cancer Research, the Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou 510095, China
| | - Shihua Liu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Shupei Yu
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Sasa Li
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Wenqiang He
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Man-Sun Sy
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Mingjian Lu
- Department of Interventional Radiology, Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Guangzhou 510095, China
| | - Huixia Zhang
- Department of Human Anatomy, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chaoyang Li
- Hunan Province Key Laboratory of Tumor Cellular & Molecular Pathology, Cancer Research Institute, School of Basic Medical Sciences, University of South China, Hengyang 421001, China
- Guangzhou Municipal and Guangdong Provincial Key Laboratory of Protein Modification and Degradation, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
- Guangzhou Institute of Cancer Research, the Affiliated Cancer Hospital, Guangzhou Medical University, Guangzhou 510095, China
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2
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Bhattacharya R, Kumari J, Banerjee S, Tripathi J, Parihar SS, Mohan N, Sinha P. Hippo effector, Yorkie, is a tumor suppressor in select Drosophila squamous epithelia. Proc Natl Acad Sci U S A 2024; 121:e2319666121. [PMID: 39288176 PMCID: PMC11441523 DOI: 10.1073/pnas.2319666121] [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: 11/17/2023] [Accepted: 08/20/2024] [Indexed: 09/19/2024] Open
Abstract
Mammalian Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ) and Drosophila Yorkie (Yki) are transcription cofactors of the highly conserved Hippo signaling pathway. It has been long assumed that the YAP/TAZ/Yki signaling drives cell proliferation during organ growth. However, its instructive role in regulating developmentally programmed organ growth, if any, remains elusive. Out-of-context gain of YAP/TAZ/Yki signaling often turns oncogenic. Paradoxically, mechanically strained, and differentiated squamous epithelia display developmentally programmed constitutive nuclear YAP/TAZ/Yki signaling. The unknown, therefore, is how a growth-promoting YAP/TAZ/Yki signaling restricts proliferation in differentiated squamous epithelia. Here, we show that reminiscent of a tumor suppressor, Yki negatively regulates the cell growth-promoting PI3K/Akt/TOR signaling in the squamous epithelia of Drosophila tubular organs. Thus, downregulation of Yki signaling in the squamous epithelium of the adult male accessory gland (MAG) up-regulates PI3K/Akt/TOR signaling, inducing cell hypertrophy, exit from their cell cycle arrest, and, finally, culminating in squamous cell carcinoma (SCC). Thus, blocking PI3K/Akt/TOR signaling arrests Yki loss-induced MAG-SCC. Further, MAG-SCCs, like other lethal carcinomas, secrete a cachectin, Impl2-the Drosophila homolog of mammalian IGFBP7-inducing cachexia and shortening the lifespan of adult males. Moreover, in the squamous epithelium of other tubular organs, like the dorsal trunk of larval tracheal airways or adult Malpighian tubules, downregulation of Yki signaling triggers PI3K/Akt/TOR-induced cell hypertrophy. Our results reveal that Yki signaling plays an instructive, antiproliferative role in the squamous epithelia of tubular organs.
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Affiliation(s)
- Rachita Bhattacharya
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Jaya Kumari
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Shweta Banerjee
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Jyoti Tripathi
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Saurabh Singh Parihar
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Nitin Mohan
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
| | - Pradip Sinha
- Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
- Mehta Family Center for Engineering in Medicine, Indian Institute of Technology Kanpur, Uttar Pradesh208016, India
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3
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Kacker S, Parsad V, Singh N, Hordiichuk D, Alvarez S, Gohar M, Kacker A, Rai SK. Planar Cell Polarity Signaling: Coordinated Crosstalk for Cell Orientation. J Dev Biol 2024; 12:12. [PMID: 38804432 PMCID: PMC11130840 DOI: 10.3390/jdb12020012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/08/2024] [Accepted: 04/13/2024] [Indexed: 05/29/2024] Open
Abstract
The planar cell polarity (PCP) system is essential for positioning cells in 3D networks to establish the proper morphogenesis, structure, and function of organs during embryonic development. The PCP system uses inter- and intracellular feedback interactions between components of the core PCP, characterized by coordinated planar polarization and asymmetric distribution of cell populations inside the cells. PCP signaling connects the anterior-posterior to left-right embryonic plane polarity through the polarization of cilia in the Kupffer's vesicle/node in vertebrates. Experimental investigations on various genetic ablation-based models demonstrated the functions of PCP in planar polarization and associated genetic disorders. This review paper aims to provide a comprehensive overview of PCP signaling history, core components of the PCP signaling pathway, molecular mechanisms underlying PCP signaling, interactions with other signaling pathways, and the role of PCP in organ and embryonic development. Moreover, we will delve into the negative feedback regulation of PCP to maintain polarity, human genetic disorders associated with PCP defects, as well as challenges associated with PCP.
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Affiliation(s)
- Sandeep Kacker
- Department of Pharmacology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis;
| | - Varuneshwar Parsad
- Department of Human Body Structure and Function, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (V.P.); (D.H.)
| | - Naveen Singh
- Department of Cerll and Molecular Biology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (N.S.); (S.A.); (M.G.)
| | - Daria Hordiichuk
- Department of Human Body Structure and Function, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (V.P.); (D.H.)
| | - Stacy Alvarez
- Department of Cerll and Molecular Biology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (N.S.); (S.A.); (M.G.)
| | - Mahnoor Gohar
- Department of Cerll and Molecular Biology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (N.S.); (S.A.); (M.G.)
| | - Anshu Kacker
- Department of Histology and Human Physiology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis;
| | - Sunil Kumar Rai
- Department of Cerll and Molecular Biology, Medical University of the Americas, Charlestown KN 1102, Saint Kitts and Nevis; (N.S.); (S.A.); (M.G.)
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Guo T, Miao C, Liu Z, Duan J, Ma Y, Zhang X, Yang W, Xue M, Deng Q, Guo P, Xi Y, Yang X, Huang X, Ge W. Impaired dNKAP function drives genome instability and tumorigenic growth in Drosophila epithelia. J Mol Cell Biol 2024; 15:mjad078. [PMID: 38059855 PMCID: PMC11070879 DOI: 10.1093/jmcb/mjad078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 11/09/2023] [Accepted: 12/05/2023] [Indexed: 12/08/2023] Open
Abstract
Mutations or dysregulated expression of NF-kappaB-activating protein (NKAP) family genes have been found in human cancers. How NKAP family gene mutations promote tumor initiation and progression remains to be determined. Here, we characterized dNKAP, the Drosophila homolog of NKAP, and showed that impaired dNKAP function causes genome instability and tumorigenic growth in a Drosophila epithelial tumor model. dNKAP-knockdown wing imaginal discs exhibit tumorigenic characteristics, including tissue overgrowth, cell-invasive behavior, abnormal cell polarity, and cell adhesion defects. dNKAP knockdown causes both R-loop accumulation and DNA damage, indicating the disruption of genome integrity. Further analysis showed that dNKAP knockdown induces c-Jun N-terminal kinase (JNK)-dependent apoptosis and causes aberrant cell proliferation in distinct cell populations. Activation of the Notch and JAK/STAT signaling pathways contributes to the tumorigenic growth of dNKAP-knockdown tissues. Furthermore, JNK signaling is essential for dNKAP depletion-mediated cell invasion. Transcriptome analysis of dNKAP-knockdown tissues confirmed the misregulation of signaling pathways involved in promoting tumorigenesis and revealed abnormal regulation of metabolic pathways. dNKAP knockdown and oncogenic Ras, Notch, or Yki mutations show synergies in driving tumorigenesis, further supporting the tumor-suppressive role of dNKAP. In summary, this study demonstrates that dNKAP plays a tumor-suppressive role by preventing genome instability in Drosophila epithelia and thus provides novel insights into the roles of human NKAP family genes in tumor initiation and progression.
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Affiliation(s)
- Ting Guo
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Chen Miao
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Zhonghua Liu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jingwei Duan
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Yanbin Ma
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
| | - Xiao Zhang
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Weiwei Yang
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Maoguang Xue
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Qiannan Deng
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Pengfei Guo
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Yongmei Xi
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xiaohang Yang
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Xun Huang
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wanzhong Ge
- Division of Human Reproduction and Developmental Genetics, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Institute of Genetics, Zhejiang University School of Medicine, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou 310006, China
- Cancer Center, Zhejiang University, Hangzhou 310058, China
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5
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Gu QY, Liu YX, Wang JL, Huang XL, Li RN, Linghu H. LLGL2 Inhibits Ovarian Cancer Metastasis by Regulating Cytoskeleton Remodeling via ACTN1. Cancers (Basel) 2023; 15:5880. [PMID: 38136424 PMCID: PMC10742334 DOI: 10.3390/cancers15245880] [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: 10/19/2023] [Revised: 12/09/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023] Open
Abstract
Epithelial ovarian cancer is the most lethal gynecological malignant tumor. Although debulking surgery, chemotherapy, and PARP inhibitors have greatly improved survival, the prognosis for patients with advanced EOC without HRD is still poor. LLGL2, as a cell polarity factor, is involved in maintaining cell polarity and asymmetric cell division. In the study of zebrafish development, LLGL2 regulated the proliferation and migration of epidermal cells and the formation of cortical F-actin. However, the role of LLGL2 in ovarian cancer has not been described. Our study found, through bioinformatics analysis, that low expression of LLGL2 was significantly associated with a more advanced stage and a higher grade of EOC and a poorer survival of patients. Functional experiments that involved LLGL2 overexpression and knockdown showed that LLGL2 inhibited the migration and invasion abilities of ovarian cancer cells in vitro, without affecting their proliferation. LLGL2-overexpressing mice had fewer metastatic implant foci than the controls in vivo. Mechanistically, immunoprecipitation combined with mass spectrometry analysis suggested that LLGL2 regulated cytoskeletal remodeling by interacting with ACTN1. LLGL2 altered the intracellular localization and function of ACTN1 without changing its protein and mRNA levels. Collectively, we uncovered that LLGL2 impaired actin filament aggregation into bundles by interacting with ACTN1, which led to cytoskeleton remodeling and inhibition of the invasion and metastasis of ovarian cancer cells.
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Affiliation(s)
| | | | | | | | - Ruo-Nan Li
- Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; (Q.-Y.G.); (Y.-X.L.); (J.-L.W.); (X.-L.H.)
| | - Hua Linghu
- Department of Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; (Q.-Y.G.); (Y.-X.L.); (J.-L.W.); (X.-L.H.)
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6
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Antson H, Huang Y, Tõnissoo T, Shimmi O. Conditional knockdown protocol for studying cellular communication using Drosophila melanogaster wing imaginal disc. STAR Protoc 2023; 4:102566. [PMID: 37768826 PMCID: PMC10550844 DOI: 10.1016/j.xpro.2023.102566] [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: 06/26/2023] [Revised: 08/03/2023] [Accepted: 08/18/2023] [Indexed: 09/30/2023] Open
Abstract
Apicobasal polarity determinants are potential tumor suppressors that have been extensively studied. However, the precise mechanisms by which their misregulation disrupts tissue homeostasis are not fully understood. Here, we present a comprehensive protocol for establishing a conditional RNAi knockdown of scribble in Drosophila wing imaginal disc. We describe steps for generating fly lines, conditional knockdown in host stocks, and sample preparation. We then detail procedures for imaging, image analysis, and verification of wing disc phenotypes by various antibodies. For complete details on the use and execution of this protocol, please refer to Huang et al.1.
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Affiliation(s)
- Hanna Antson
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Yunxian Huang
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Tambet Tõnissoo
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Osamu Shimmi
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia; Institute of Biotechnology, University of Helsinki, Helsinki, Finland.
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Tian A, Wang X, Xu Y, Morejon V, Huang Y, Nwapuda C, Deng W. EGFR signaling controls directionality of epithelial multilayer formation upon loss of cell polarity. EMBO J 2023; 42:e113856. [PMID: 37953688 PMCID: PMC10711663 DOI: 10.15252/embj.2023113856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 11/14/2023] Open
Abstract
Apical-basal polarity is maintained by distinct protein complexes that reside in membrane junctions, and polarity loss in monolayered epithelial cells can lead to formation of multilayers, cell extrusion, and/or malignant overgrowth. Yet, how polarity loss cooperates with intrinsic signals to control directional invasion toward neighboring epithelial cells remains elusive. Using the Drosophila ovarian follicular epithelium as a model, we found that posterior follicle cells with loss of lethal giant larvae (lgl) or Discs large (Dlg) accumulate apically toward germline cells, whereas cells with loss of Bazooka (Baz) or atypical protein kinase C (aPKC) expand toward the basal side of wildtype neighbors. Further studies revealed that these distinct multilayering patterns in the follicular epithelium were determined by epidermal growth factor receptor (EGFR) signaling and its downstream target Pointed, a zinc-finger transcription factor. Additionally, we identified Rho kinase as a Pointed target that regulates formation of distinct multilayering patterns. These findings provide insight into how cell polarity genes and receptor tyrosine kinase signaling interact to govern epithelial cell organization and directional growth that contribute to epithelial tumor formation.
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Affiliation(s)
- Aiguo Tian
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
- Tulane Aging CenterTulane University School of MedicineNew OrleansLAUSA
| | - Xian‐Feng Wang
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
| | - Yuting Xu
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
| | - Virginia Morejon
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
| | - Yi‐Chun Huang
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
| | - Chidi Nwapuda
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
| | - Wu‐Min Deng
- Department of Biochemistry and Molecular BiologyTulane University School of Medicine, Louisiana Cancer Research CenterNew OrleansLAUSA
- Tulane Aging CenterTulane University School of MedicineNew OrleansLAUSA
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8
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Abedrabbo M, Sloomy S, Abu-Leil R, Kfir-Cohen E, Ravid S. Scribble, Lgl1, and myosin IIA interact with α-/β-catenin to maintain epithelial junction integrity. Cell Adh Migr 2023; 17:1-23. [PMID: 37743653 PMCID: PMC10761038 DOI: 10.1080/19336918.2023.2260645] [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: 09/22/2022] [Accepted: 08/23/2023] [Indexed: 09/26/2023] Open
Abstract
E-cadherin-catenin complex together with the cytoskeleton, builds the core of Adherens junctions (AJs). It has been reported that Scribble stabilizes the coupling of E-cadherin with catenins promoting epithelial cell adhesion, but the mechanism remains unknown. We show that Scribble, Lgl1, and NMII-A reside in a complex with E-cadherin-catenin complex. Depletion of either Scribble or Lgl1 disrupts the localization of E-cadherin-catenin complex to AJs. aPKCζ phosphorylation of Lgl1 regulates AJ localization of Lgl1 and E-cadherin-catenin complexes. Both Scribble and Lgl1 regulate the activation and recruitment of NMII-A at AJs. Finally, Scribble and Lgl1 are downregulated by TGFβ-induced EMT, and their re-expression during EMT impedes its progression. Our results provide insight into the mechanism regulating AJ integrity by Scribble, Lgl1, and NMII-A.
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Affiliation(s)
- Maha Abedrabbo
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Shirel Sloomy
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Reham Abu-Leil
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Einav Kfir-Cohen
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - Shoshana Ravid
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel
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Yu K, Ramkumar N, Wong KKL, Tettweiler G, Verheyen EM. The AMPK-like protein kinases Sik2 and Sik3 interact with Hipk and induce synergistic tumorigenesis in a Drosophila cancer model. Front Cell Dev Biol 2023; 11:1214539. [PMID: 37854071 PMCID: PMC10579798 DOI: 10.3389/fcell.2023.1214539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 09/21/2023] [Indexed: 10/20/2023] Open
Abstract
Homeodomain-interacting protein kinases (Hipks) regulate cell proliferation, apoptosis, and tissue development. Overexpression of Hipk in Drosophila causes tumorigenic phenotypes in larval imaginal discs. We find that depletion of Salt-inducible kinases Sik2 or Sik3 can suppress Hipk-induced overgrowth. Furthermore, co-expression of constitutively active forms of Sik2 or Sik3 with Hipk caused significant tissue hyperplasia and tissue distortion, indicating that both Sik2 and Sik3 can synergize with Hipk to promote tumorous phenotypes, accompanied by elevated dMyc, Armadillo/β-catenin, and the Yorkie target gene expanded. Larvae expressing these hyperplastic growths also display an extended larval phase, characteristic of other Drosophila tumour models. Examination of total protein levels from fly tissues showed that Hipk proteins were reduced when Siks were depleted through RNAi, suggesting that Siks may regulate Hipk protein stability and/or activity. Conversely, expression of constitutively active Siks with Hipk leads to increased Hipk protein levels. Furthermore, Hipk can interact with Sik2 and Sik3 by co-immunoprecipitation. Co-expression of both proteins leads to a mobility shift of Hipk protein, suggesting it is post-translationally modified. In summary, our research demonstrates a novel function of Siks in synergizing with Hipk to promote tumour growth.
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Affiliation(s)
- Kewei Yu
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC, Canada
| | - Niveditha Ramkumar
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC, Canada
| | - Kenneth Kin Lam Wong
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC, Canada
| | - Gritta Tettweiler
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC, Canada
| | - Esther M. Verheyen
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Centre for Cell Biology, Development and Disease, Simon Fraser University, Burnaby, BC, Canada
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10
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Hsi TC, Ong KL, Sepers JJ, Kim J, Bilder D. Systemic coagulopathy promotes host lethality in a new Drosophila tumor model. Curr Biol 2023; 33:3002-3010.e6. [PMID: 37354901 PMCID: PMC11365082 DOI: 10.1016/j.cub.2023.05.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 04/12/2023] [Accepted: 05/31/2023] [Indexed: 06/26/2023]
Abstract
Malignant tumors trigger a complex network of inflammatory and wound repair responses, prompting Dvorak's characterization of tumors as "wounds that never heal."1 Some of these responses lead to profound defects in blood clotting, such as disseminated intravascular coagulopathy (DIC), which correlate with poor prognoses.2,3,4 Here, we demonstrate that a new tumor model in Drosophila provokes phenotypes that resemble coagulopathies observed in patients. Fly ovarian tumors overproduce multiple secreted components of the clotting cascade and trigger hypercoagulation of fly blood (hemolymph). Hypercoagulation occurs shortly after tumor induction and is transient; it is followed by a hypocoagulative state that is defective in wound healing. Cellular clotting regulators accumulate on the tumor over time and are depleted from the body, suggesting that hypocoagulation is caused by exhaustion of host clotting components. We show that rescuing coagulopathy by depleting a tumor-produced clotting factor improves survival of tumor-bearing flies, despite the fact that flies have an open (non-vascular) circulatory system. As clinical studies suggest that lethality in patients with high serum levels of clotting components can be independent of thrombotic events,5,6 our work establishes a platform for identifying alternative mechanisms by which tumor-driven coagulopathy triggers early mortality. Moreover, it opens up exploration of other conserved mechanisms of host responses to chronic wounds.
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Affiliation(s)
- Tsai-Ching Hsi
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Katy L Ong
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Jorian J Sepers
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Jung Kim
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - David Bilder
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA.
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11
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Wong KC, Jayapalan JJ, Subramanian P, Ismail MN, Abdul-Rahman PS. Label-free quantitative mass spectrometry analysis of the circadian proteome of Drosophila melanogaster lethal giant larvae mutants reveals potential therapeutic effects of melatonin. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2023; 113:e22008. [PMID: 36915983 DOI: 10.1002/arch.22008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/10/2023] [Accepted: 02/22/2023] [Indexed: 05/16/2023]
Abstract
Mutation in the Drosophila melanogaster lethal giant larvae (lgl), a tumor suppressor gene with a well-established role in cellular polarity, is known to results in massive cellular proliferation and neoplastic outgrowths. Although the tumorigenic properties of lgl mutant have been previously studied, however, little is known about its consequences on the proteome. In this study, mass spectrometry-based label-free quantitative proteomics was employed to investigate the changes in the head and intestinal tissues proteins of Drosophila melanogaster, due to lgl mutation and following treatment with melatonin. Additionally, to uncover the time-influenced variations in the proteome during tumorigenesis and melatonin treatment, the rhythmic expression of proteins was also investigated at 6-h intervals within 24-h clock. Together, the present study has identified 434 proteins of altered expressions (p < 0.05 and fold change ±1.5) in the tissues of flies in response to lgl mutation as well as posttreatment with melatonin. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of differentially expressed proteins revealed that lgl mutation had significantly affected the biological functions, including metabolism, and protein synthesis and degradation, in flies' tissues. Besides, melatonin had beneficially mitigated the deleterious effects of lgl mutation by reversing the alterations in protein expression closer to baseline levels. Further, changes in protein expression in the tissues due to lgl mutation and melatonin treatment were found rhythmically orchestrated. Together, these findings provide novel insight into the pathways involved in lgl-induced tumorigenesis as well as demonstrated the efficacy of melatonin as a potential anticancer agent. Data are available via ProteomeXchange with identifier PXD033191.
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Affiliation(s)
- Kar-Cheng Wong
- Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Jaime J Jayapalan
- Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
- Universiti Malaya Centre for Proteomics Research (UMCPR), Universiti Malaya, Kuala Lumpur, Malaysia
| | - Perumal Subramanian
- Department of Biochemistry and Biotechnology, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Mohd Nazri Ismail
- Analytical Biochemistry Research Centre, Universiti Sains Malaysia, Bayan Lepas, Penang, Malaysia
| | - Puteri S Abdul-Rahman
- Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
- Universiti Malaya Centre for Proteomics Research (UMCPR), Universiti Malaya, Kuala Lumpur, Malaysia
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12
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Huang Y, Gui J, Myllymäki SM, Mikkola ML, Shimmi O. Coordination of tissue homeostasis and growth by the Scribble-α-Catenin-Septate junction complex. iScience 2023; 26:106490. [PMID: 37096043 PMCID: PMC10122046 DOI: 10.1016/j.isci.2023.106490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/27/2023] [Accepted: 03/18/2023] [Indexed: 04/26/2023] Open
Abstract
Maintaining apicobasal polarity (ABP) is crucial for epithelial integrity and homeostasis during tissue development. Although intracellular mechanisms underlying ABP establishment have been well studied, it remains to be addressed how the ABP coordinates tissue growth and homeostasis. By studying Scribble, a key ABP determinant, we address molecular mechanisms underlying ABP-mediated growth control in the Drosophila wing imaginal disc. Our data reveal that genetic and physical interactions between Scribble, Septate junction complex and α-Catenin appear to be key for sustaining ABP-mediated growth control. Cells with conditional scribble knockdown instigate the loss of α-Catenin, ultimately leading to the formation of neoplasia accompanying with activation of Yorkie. In contrast, cells expressing wild type scribble progressively restore ABP in scribble hypomorphic mutant cells in a non-autonomous manner. Our findings provide unique insights into cellular communication among optimal and sub-optimal cells to regulate epithelial homeostasis and growth.
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Affiliation(s)
- Yunxian Huang
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - Jinghua Gui
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | | | - Marja L. Mikkola
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - Osamu Shimmi
- Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
- Institute of Molecular and Cell Biology, University of Tartu, 51010 Tartu, Estonia
- Corresponding author
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13
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Bii VM, Rudoy D, Klezovitch O, Vasioukhin V. Lethal giant larvae gene family ( Llgl1 and Llgl2 ) functions as a tumor suppressor in mouse skin epidermis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.06.531408. [PMID: 36945368 PMCID: PMC10028895 DOI: 10.1101/2023.03.06.531408] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Loss of cell polarity and tissue disorganization occurs in majority of epithelial cancers. Studies in simple model organisms identified molecular mechanisms responsible for the establishment and maintenance of cellular polarity, which play a pivotal role in establishing proper tissue architecture. The exact role of these cell polarity pathways in mammalian cancer is not completely understood. Here we analyzed the mammalian orthologs of drosophila apical-basal polarity gene lethal giant larvae ( lgl ), which regulates asymmetric stem cell division and functions as a tumor suppressor in flies. There are two mammalian orthologs of lgl ( Llgl1 and Llgl2 ). To determine the role of the entire lgl signaling pathway in mammals we generated mice with ablation of both Llgl1 and Llgl2 in skin epidermis using K14-Cre ( Llgl1/2 -/- cKO mice). Surprisingly, we found that ablation of Llgl1/2 genes does not impact epidermal polarity in adult mice. However, old Llgl1/2 cKO mice present with focal skin lesions which are missing epidermal layer and ripe with inflammation. To determine the role of lgl signaling pathway in cancer we generated Trp53 -/- /Llgl1/2 -/- cKO and Trp53 -/+ /Llgl1/2 -/- cKO mice. Loss of Llgl1/2 promoted squamous cell carcinoma (SCC) development in Trp53 -/- cKO and caused SCC in Trp53 -/+ cKO mice, while no cancer was observed in Trp53 -/+ cKO controls. Mechanistically, we show that ablation of Llgl1/2 causes activation of aPKC and upregulation of NF-kB signaling pathway, which may be necessary for SCC in Trp53 -/+ /Llgl1/2 -/- cKO mice. We conclude that Lgl signaling pathway functions as a tumor suppressor in mammalian skin epidermis.
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14
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Stanley D, Haas E, Kim Y. Beyond Cellular Immunity: On the Biological Significance of Insect Hemocytes. Cells 2023; 12:cells12040599. [PMID: 36831266 PMCID: PMC9954174 DOI: 10.3390/cells12040599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/10/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
Insect immunity is assorted into humoral and cellular immune reactions. Humoral reactions involve the regulated production of anti-microbial peptides, which directly kill microbial invaders at the membrane and intracellular levels. In cellular immune reactions, millions of hemocytes are mobilized to sites of infection and replaced by hematopoiesis at a high biological cost after the immune defense. Here, we considered that the high biological costs of maintaining and replacing hemocytes would be a better investment if hemocytes carried out meaningful biological actions unrelated to cellular immunity. This idea allows us to treat a set of 10 hemocyte actions that are not directly involved in immunity, some of which, so far, are known only in Drosophila melanogaster. These include (1) their actions in molting and development, (2) in surviving severe hypoxia, (3) producing phenoloxidase precursor and its actions beyond immunity, (4) producing vitellogenin in a leafhopper, (5) recognition and responses to cancer in Drosophila, (6) non-immune actions in Drosophila, (7) clearing apoptotic cells during development of the central nervous system, (8) developing hematopoietic niches in Drosophila, (9) synthesis and transport of a lipoprotein, and (10) hemocyte roles in iron transport. We propose that the biological significance of hemocytes extends considerably beyond immunity.
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Affiliation(s)
- David Stanley
- Biological Control of Insect Research Laboratory, USDA/ARS, 1503 S Providence Road, Columbia, MO 65203, USA
- Correspondence: (D.S.); (Y.K.)
| | - Eric Haas
- Department of Chemistry and Biochemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, USA
| | - Yonggyun Kim
- Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea
- Correspondence: (D.S.); (Y.K.)
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15
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Vats A, Thatte JV, Banks L. Molecular dissection of the E6 PBM identifies essential residues regulating Chk1 phosphorylation and subsequent 14-3-3 recognition. Tumour Virus Res 2023; 15:200257. [PMID: 36775199 PMCID: PMC10009279 DOI: 10.1016/j.tvr.2023.200257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/12/2023] Open
Abstract
Previous studies have shown that the high-risk HPV E6 oncoprotein PDZ binding motifs (PBMs) can interact with PDZ proteins or members of the 14-3-3 family, depending upon the E6 phosphorylation status. However, different HPV E6 oncoproteins are subjected to phosphorylation by different cellular kinases. We have therefore been interested in determining whether we can dissect E6's PDZ and 14-3-3 interactions at the molecular level. Using HPV-18 E6, we have found that its Chk1 phosphorylation requires residues both upstream and downstream of the phospho-acceptor site, in addition to the Chk1 consensus recognition motif. Furthermore, we demonstrate that different high-risk HPV E6 types are differentially phosphorylated by Chk1 kinases, potentially due to the differences in their carboxy-terminal residues, as they are critical for kinase recognition. Moreover, differences in the E6 phosphorylation levels of different HR HPV types directly link to their ability to interact with different 14-3-3 isoforms, based on their phospho-status. Interestingly, 14-3-3 recognition appears to be less dependent upon the precise sequence constraints of the E6 carboxy terminal region, whilst minor amino acid variations have a major impact upon PDZ recognition. These results demonstrate that changes in E6 phospho-status during the life cycle or during malignant progression will modulate E6 interactions and, potentially, inversely regulate the levels of PDZ and 14-3-3 proteins.
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Affiliation(s)
- Arushi Vats
- International Centre for Genetic Engineering and Biotechnology, Padriciano, 99-34149, Trieste, Italy.
| | - Jayashree V Thatte
- International Centre for Genetic Engineering and Biotechnology, Padriciano, 99-34149, Trieste, Italy
| | - Lawrence Banks
- International Centre for Genetic Engineering and Biotechnology, Padriciano, 99-34149, Trieste, Italy
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16
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Molano-Fernández M, Hickson ID, Herranz H. Cyclin E overexpression in the Drosophila accessory gland induces tissue dysplasia. Front Cell Dev Biol 2023; 10:992253. [PMID: 36704199 PMCID: PMC9871066 DOI: 10.3389/fcell.2022.992253] [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: 07/12/2022] [Accepted: 12/23/2022] [Indexed: 01/12/2023] Open
Abstract
The regulation of the cell division cycle is governed by a complex network of factors that together ensure that growing or proliferating cells maintain a stable genome. Defects in this system can lead to genomic instability that can affect tissue homeostasis and thus compromise human health. Variations in ploidy and cell heterogeneity are observed frequently in human cancers. Here, we examine the consequences of upregulating the cell cycle regulator Cyclin E in the Drosophila melanogaster male accessory gland. The accessory gland is the functional analog of the human prostate. This organ is composed of a postmitotic epithelium that is emerging as a powerful in vivo system for modelling different aspects of tumor initiation and progression. We show that Cyclin E upregulation in this model is sufficient to drive tissue dysplasia. Cyclin E overexpression drives endoreplication and affects DNA integrity, which results in heterogeneous nuclear and cellular composition and variable degrees of DNA damage. We present evidence showing that, despite the presence of genotoxic stress, those cells are resistant to apoptosis and thus defective cells are not eliminated from the tissue. We also show that Cyclin E-expressing cells in the accessory gland display mitochondrial DNA aggregates that colocalize with Cyclin E protein. Together, the findings presented here show that Cyclin E upregulation in postmitotic cells of the accessory gland organ causes cellular defects such as genomic instability and mitochondrial defects, eventually leading to tissue dysplasia. This study highlights novel mechanisms by which Cyclin E might contribute to disease initiation and progression.
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Affiliation(s)
- Maria Molano-Fernández
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Ian D. Hickson
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark,Department of Cellular and Molecular Medicine, Center for Chromosome Stability and Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Héctor Herranz
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark,*Correspondence: Héctor Herranz,
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17
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Sollazzo M, Paglia S, Di Giacomo S, Grifoni D. Apoptosis inhibition restrains primary malignant traits in different Drosophila cancer models. Front Cell Dev Biol 2023; 10:1043630. [PMID: 36704198 PMCID: PMC9871239 DOI: 10.3389/fcell.2022.1043630] [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: 09/13/2022] [Accepted: 12/22/2022] [Indexed: 01/12/2023] Open
Abstract
Tumor cells exploit multiple mechanisms to evade apoptosis, hence the strategies aimed at reactivating cell death in cancer. However, recent studies are revealing that dying cells play remarkable pro-oncogenic roles. Among the mechanisms promoting cell death, cell competition, elicited by disparities in MYC activity in confronting cells, plays the primary role of assuring tissue robustness during development from Drosophila to mammals: cells with high MYC levels (winners) overproliferate while killing suboptimal neighbors (losers), whose death is essential to process completion. This mechanism is coopted by tumor cells in cancer initiation, where host cells succumb to high-MYC-expressing precancerous neighbors. Also in this case, inhibition of cell death restrains aberrant cell competition and rescues tissue structure. Inhibition of apoptosis may thus emerge as a good strategy to counteract cancer progression in competitive contexts; of note, we recently found a positive correlation between cell death amount at the tumor/stroma interface and MYC levels in human cancers. Here we used Drosophila to investigate the functional role of competition-dependent apoptosis in advanced cancers, observing dramatic changes in mass dimensions and composition following a boost in cell competition, rescued by apoptosis inhibition. This suggests the role of competition-dependent apoptosis be not confined to the early stages of tumorigenesis. We also show that apoptosis inhibition, beside restricting cancer mass, is sufficient to rescue tissue architecture and counteract cell migration in various cancer contexts, suggesting that a strong activation of the apoptotic pathways intensifies cancer burden by affecting distinct phenotypic traits at different stages of the disease.
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Affiliation(s)
- Manuela Sollazzo
- CanceЯEvolutionLab, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Simona Paglia
- CanceЯEvolutionLab, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Simone Di Giacomo
- CanceЯEvolutionLab, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Daniela Grifoni
- CanceЯEvolutionLab, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy,CanceЯEvolutionLab, Department of Life, Health and Environmental Sciences, University of L’Aquila, L’Aquila, Italy,*Correspondence: Daniela Grifoni,
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18
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Prado-Mantilla A, Lechler T. Polarity in skin development and cancer. Curr Top Dev Biol 2023; 154:317-336. [PMID: 37100522 DOI: 10.1016/bs.ctdb.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
The epidermis is a stratified squamous epithelium that forms the outermost layer of the skin. Its primary function is to act as a barrier, keeping pathogens and toxins out and moisture in. This physiological role has necessitated major differences in the organization and polarity of the tissue as compared to simple epithelia. We discuss four aspects of polarity in the epidermis - the distinctive polarities of basal progenitor cells as well as differentiated granular cells, the polarity of adhesions and the cytoskeleton across the tissue as keratinocytes differentiate, and the planar cell polarity of the tissue. These distinctive polarities are essential for the morphogenesis and the function of the epidermis and have also been implicated in regulating tumor formation.
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19
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Cell polarity and extrusion: How to polarize extrusion and extrude misspolarized cells? Curr Top Dev Biol 2023; 154:131-167. [PMID: 37100516 DOI: 10.1016/bs.ctdb.2023.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
The barrier function of epithelia is one of the cornerstones of the body plan organization of metazoans. It relies on the polarity of epithelial cells which organizes along the apico-basal axis the mechanical properties, signaling as well as transport. This barrier function is however constantly challenged by the fast turnover of epithelia occurring during morphogenesis or adult tissue homeostasis. Yet, the sealing property of the tissue can be maintained thanks to cell extrusion: a series of remodeling steps involving the dying cell and its neighbors leading to seamless cell expulsion. Alternatively, the tissue architecture can also be challenged by local damages or the emergence of mutant cells that may alter its organization. This includes mutants of the polarity complexes which can generate neoplastic overgrowths or be eliminated by cell competition when surrounded by wild type cells. In this review, we will provide an overview of the regulation of cell extrusion in various tissues focusing on the relationship between cell polarity, cell organization and the direction of cell expulsion. We will then describe how local perturbations of polarity can also trigger cell elimination either by apoptosis or by cell exclusion, focusing specifically on how polarity defects can be directly causal to cell elimination. Overall, we propose a general framework connecting the influence of polarity on cell extrusion and its contribution to aberrant cell elimination.
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20
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Wright BA, Kvansakul M, Schierwater B, Humbert PO. Cell polarity signalling at the birth of multicellularity: What can we learn from the first animals. Front Cell Dev Biol 2022; 10:1024489. [PMID: 36506100 PMCID: PMC9729800 DOI: 10.3389/fcell.2022.1024489] [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: 08/21/2022] [Accepted: 10/31/2022] [Indexed: 11/25/2022] Open
Abstract
The innovation of multicellularity has driven the unparalleled evolution of animals (Metazoa). But how is a multicellular organism formed and how is its architecture maintained faithfully? The defining properties and rules required for the establishment of the architecture of multicellular organisms include the development of adhesive cell interactions, orientation of division axis, and the ability to reposition daughter cells over long distances. Central to all these properties is the ability to generate asymmetry (polarity), coordinated by a highly conserved set of proteins known as cell polarity regulators. The cell polarity complexes, Scribble, Par and Crumbs, are considered to be a metazoan innovation with apicobasal polarity and adherens junctions both believed to be present in all animals. A better understanding of the fundamental mechanisms regulating cell polarity and tissue architecture should provide key insights into the development and regeneration of all animals including humans. Here we review what is currently known about cell polarity and its control in the most basal metazoans, and how these first examples of multicellular life can inform us about the core mechanisms of tissue organisation and repair, and ultimately diseases of tissue organisation, such as cancer.
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Affiliation(s)
- Bree A. Wright
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Marc Kvansakul
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia,Research Centre for Molecular Cancer Prevention, La Trobe University, Melbourne, VIC, Australia
| | - Bernd Schierwater
- Institute of Animal Ecology and Evolution, University of Veterinary Medicine Hannover, Foundation, Bünteweg, Hannover, Germany
| | - Patrick O. Humbert
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia,Research Centre for Molecular Cancer Prevention, La Trobe University, Melbourne, VIC, Australia,Department of Biochemistry and Pharmacology, University of Melbourne, Melbourne, VIC, Australia,Department of Clinical Pathology, University of Melbourne, Melbourne, VIC, Australia,*Correspondence: Patrick O. Humbert,
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21
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Huang Y, Gui J, Myllymäki SM, Roy K, Tõnissoo T, Mikkola ML, Shimmi O. Scribble and α-Catenin cooperatively regulate epithelial homeostasis and growth. Front Cell Dev Biol 2022; 10:912001. [PMID: 36211469 PMCID: PMC9532510 DOI: 10.3389/fcell.2022.912001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 09/08/2022] [Indexed: 11/13/2022] Open
Abstract
Epithelial homeostasis is an emergent property of both physical and biochemical signals emanating from neighboring cells and across tissue. A recent study reveals that Scribble, an apico-basal polarity determinant, cooperates with α-Catenin, an adherens junction component, to regulate tissue homeostasis in the Drosophila wing imaginal disc. However, it remains to be addressed whether similar mechanisms are utilized in vertebrates. In this study, we first address how α-Catenin cooperates with Scribble to regulate epithelial homeostasis and growth in mammalian cells. Our data show that α-Catenin and Scribble interact physically in mammalian cells. We then found that both α-Catenin and Scribble are required for regulating nuclear translocation of YAP, an effector of the Hippo signaling pathway. Furthermore, ectopic Scribble suffices to suppress YAP in an α-Catenin-dependent manner. Then, to test our hypothesis that Scribble amounts impact epithelial growth, we use the Drosophila wing imaginal disc. We show that Scribble expression is complementary to Yorkie signal, the Drosophila ortholog of YAP. Ectopic expression of full-length Scribble or Scribble Leucine Rich Region (LRR):α-Catenin chimera sufficiently down-regulates Yorkie signal, leading to smaller wing size. Moreover, Scribble LRR:α-Catenin chimera rescues scribble mutant clones in the wing imaginal disc to maintain tissue homeostasis. Taken together, our studies suggest that the association of cell polarity component Scribble with α-Catenin plays a conserved role in epithelial homeostasis and growth.
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Affiliation(s)
- Yunxian Huang
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Jinghua Gui
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | | | - Kallol Roy
- Institute of Computer Science, University of Tartu, Tartu, Estonia
| | - Tambet Tõnissoo
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Marja L. Mikkola
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Osamu Shimmi
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
- *Correspondence: Osamu Shimmi,
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22
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Kim KH, Hong GL, Kim YJ, Lee HJ, Jung JY. Silencing of LLGL2 Suppresses the Estradiol-Induced BPH-1 Cell Proliferation through the Regulation of Autophagy. Biomedicines 2022; 10:biomedicines10081981. [PMID: 36009528 PMCID: PMC9406103 DOI: 10.3390/biomedicines10081981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/05/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Lethal giant larvae (Lgl) is an apical-basal polarity gene first identified in Drosophila. LLGL2 is one of the mammalian homologs of Lgl. However, little is known about its function in the prostate. In this study, to explore the new role of LLGL2 in the prostate, we examined the proliferative activity of a BPH-1 cell line, a well-established model for the human prostate biology of benign prostatic hyperplasia (BPH). The expression of LLGL2 was dose-dependently increased in BPH-1 cells after treatment with 17β-estradiol (E2). Additionally, E2 treatment increased the proliferation of the BPH-1 cells. However, the knockdown of LLGL2 with siRNA significantly suppressed the proliferation of the E2-treated BPH-1 cells. Moreover, si-llgl2 treatment up-regulated the expression of LC-3B, ATG7, and p-beclin, which are known to play a pivotal role in autophagosome formation in E2-treated BPH-1 cells. Overexpression of LLGL2 was able to further prove these findings by showing the opposite results from the knockdown of LLGL2 in E2-treated BPH-1 cells. Collectively, our results suggest that LLGL2 is closely involved in the proliferation of prostate cells by regulating autophagosome formation. These results provide a better understanding of the mechanism involved in the effect of LLGL2 on prostate cell proliferation. LLGL2 might serve as a potential target in the diagnosis and/or treatment of human BPH.
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Affiliation(s)
| | | | | | | | - Ju-Young Jung
- Correspondence: ; Tel.: +82-42-821-8899; Fax: +82-42-821-7926
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23
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Lv T, Xu J, Yuan H, Wang J, Jiang X. Dual Function of Par3 in Tumorigenesis. Front Oncol 2022; 12:915957. [PMID: 35875120 PMCID: PMC9305838 DOI: 10.3389/fonc.2022.915957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/14/2022] [Indexed: 11/20/2022] Open
Abstract
Cell maintenance and the establishment of cell polarity involve complicated interactions among multiple protein complexes as well as the regulation of different signaling pathways. As an important cell polarity protein, Par3 is evolutionarily conserved and involved in tight junction formation as well as tumorigenesis. In this review, we aimed to explore the function of Par3 in tumorigenesis. Research has shown that Par3 exhibits dual functions in human cancers, both tumor-promoting and tumor-suppressive. Here, we focus on the activities of Par3 in different stages and types of tumors, aiming to offer a new perspective on the molecular mechanisms that regulate the functions of Par3 in tumor development. Tumor origin, tumor microenvironment, tumor type, cell density, cell–cell contact, and the synergistic effect of Par3 and other tumor-associated signaling pathways may be important reasons for the dual function of Par3. The important role of Par3 in mammalian tumorigenesis and potential signaling pathways is context dependent.
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Affiliation(s)
- Tao Lv
- Centre for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, China
- Yunnan Engineering Research Center of Fruit Wine, Qujing Normal University, Qujing, China
- Key Laboratory of Yunnan Province Universities of Qujing Natural History and Early Vertebrate Evolution, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, China
| | - Jiashun Xu
- Centre for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, China
| | - Hemei Yuan
- Centre for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, China
| | - Jianling Wang
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing, China
- *Correspondence: Jianling Wang, ; Xinni Jiang,
| | - Xinni Jiang
- School of Biological Sciences and Technology, Chengdu Medical College, Chengdu, China
- *Correspondence: Jianling Wang, ; Xinni Jiang,
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24
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Canet-Jourdan C, Pagès DL, Nguyen-Vigouroux C, Cartry J, Zajac O, Desterke C, Lopez JB, Gutierrez-Mateyron E, Signolle N, Adam J, Raingeaud J, Polrot M, Gonin P, Mathieu JRR, Souquere S, Pierron G, Gelli M, Dartigues P, Ducreux M, Barresi V, Jaulin F. Patient-derived organoids identify an apico-basolateral polarity switch associated with survival in colorectal cancer. J Cell Sci 2022; 135:276070. [PMID: 35703098 DOI: 10.1242/jcs.259256] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 05/23/2022] [Indexed: 11/20/2022] Open
Abstract
The metastatic progression of cancer remains a major issue in patient treatment. Yet, the molecular and cellular mechanisms underlying this process remains unclear. Here, we use primary explants and organoids from patients harboring mucinous colorectal carcinoma (MUC CRC), a poor prognosis histological form of digestive cancers, to study the architecture, invasive behavior and chemoresistance of tumor cell intermediates. We report that these tumors maintain a robust apico-basolateral polarity as they spread in the peritumoral stroma or organotypic collagen-I gels. We identified two distinct topologies: MUC CRCs either display a conventional "apical-in" polarity or, more frequently, harbor an inverted "apical-out" topology. Transcriptomic analyses combined with interference experiments on organoids showed that TGFb and focal adhesion signaling pathways are the main drivers of polarity orientation. Finally, this apical-out topology is associated with increased resistance to chemotherapeutic treatments in organoids and decreased patient survival in the clinic. Thus, patient-derived organoids have the potential to bridge histological, cellular and molecular analyses to decrypt onco-morphogenic programs and stratify cancer patients.
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Affiliation(s)
| | | | | | - Jérôme Cartry
- INSERM U-1279, Gustave Roussy, Villejuif, F-94805, France
| | - Olivier Zajac
- Institut Curie, PSL Research University, CNRS UMR 144, F-75005 Paris, France
| | | | | | | | - Nicolas Signolle
- INSERM Unit U981, Experimental Pathology, Gustave Roussy, 94805 Villejuif, France
| | - Julien Adam
- INSERM Unit U981, Experimental Pathology, Gustave Roussy, 94805 Villejuif, France
| | - Joel Raingeaud
- INSERM U-1279, Gustave Roussy, Villejuif, F-94805, France
| | - Mélanie Polrot
- Plateforme d'Evaluation Préclinique, AMMICA UMS 3655/ US 23, Gustave Roussy, Villejuif, F-94805, France
| | - Patrick Gonin
- Plateforme d'Evaluation Préclinique, AMMICA UMS 3655/ US 23, Gustave Roussy, Villejuif, F-94805, France
| | | | | | | | - Maximiliano Gelli
- Department of Medical Oncology, Gustave Roussy, Villejuif, F-94805, France
| | - Peggy Dartigues
- Pathology Department, Gustave Roussy, Villejuif, F-94805, France
| | - Michel Ducreux
- Department of Medical Oncology, Gustave Roussy, Villejuif, F-94805, France.,Paris-Saclay University, Saint-Aubin, F-91190, France
| | - Valeria Barresi
- Department of Diagnostics and Public Health, University of Verona, Verona 37129, Italia
| | - Fanny Jaulin
- INSERM U-1279, Gustave Roussy, Villejuif, F-94805, France
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25
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Umetsu D. Cell mechanics and cell-cell recognition controls by Toll-like receptors in tissue morphogenesis and homeostasis. Fly (Austin) 2022; 16:233-247. [PMID: 35579305 PMCID: PMC9116419 DOI: 10.1080/19336934.2022.2074783] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Signal transduction by the Toll-like receptors (TLRs) is conserved and essential for innate immunity in metazoans. The founding member of the TLR family, Drosophila Toll-1, was initially identified for its role in dorsoventral axis formation in early embryogenesis. The Drosophila genome encodes nine TLRs that display dynamic expression patterns during development, suggesting their involvement in tissue morphogenesis and homeostasis. Recent progress on the developmental functions of TLRs beyond dorsoventral patterning has revealed not only their diverse functions in various biological processes, but also unprecedented molecular mechanisms in directly regulating cell mechanics and cell-cell recognition independent of the canonical signal transduction pathway involving transcriptional regulation of target genes. In this review, I feature and discuss the non-immune functions of TLRs in the control of epithelial tissue homeostasis, tissue morphogenesis, and cell-cell recognition between cell populations with different cell identities.
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Affiliation(s)
- Daiki Umetsu
- Graduate School of Life Sciences, Tohoku University, Sendai, Japan
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26
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Polarity protein SCRIB interacts with SLC3A2 to regulate proliferation and tamoxifen resistance in ER+ breast cancer. Commun Biol 2022; 5:403. [PMID: 35501367 PMCID: PMC9061724 DOI: 10.1038/s42003-022-03363-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 04/13/2022] [Indexed: 11/08/2022] Open
Abstract
Estrogen receptor (ER) positive breast cancer represents 75% of all breast cancers in women. Although patients with ER+ cancers receive endocrine therapies, more than 30% develop resistance and succumb to the disease, highlighting the need to understand endocrine resistance. Here we show an unexpected role for the cell polarity protein SCRIB as a tumor-promoter and a regulator of endocrine resistance in ER-positive breast cancer cells. SCRIB expression is induced by estrogen signaling in a MYC-dependent manner. SCRIB interacts with SLC3A2, a heteromeric component of leucine amino acid transporter SLC7A5. SLC3A2 binds to the N-terminus of SCRIB to facilitate the formation of SCRIB/SLC3A2/LLGL2/SLC7A5 quaternary complex required for membrane localization of the amino acid transporter complex. Both SCRIB and SLC3A2 are required for cell proliferation and tamoxifen resistance in ER+ cells identifying a new role for the SCRIB/SLC3A2 complex in ER+ breast cancer.
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27
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de Vreede G, Gerlach SU, Bilder D. Epithelial monitoring through ligand-receptor segregation ensures malignant cell elimination. Science 2022; 376:297-301. [PMID: 35420935 DOI: 10.1126/science.abl4213] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Animals have evolved mechanisms, such as cell competition, to remove dangerous or nonfunctional cells from a tissue. Tumor necrosis factor signaling can eliminate clonal malignancies from Drosophila imaginal epithelia, but why this pathway is activated in tumor cells but not normal tissue is unknown. We show that the ligand that drives elimination is present in basolateral circulation but remains latent because it is spatially segregated from its apically localized receptor. Polarity defects associated with malignant transformation cause receptor mislocalization, allowing ligand binding and subsequent apoptotic signaling. This process occurs irrespective of the neighboring cells' genotype and is thus distinct from cell competition. Related phenomena at epithelial wound sites are required for efficient repair. This mechanism of polarized compartmentalization of ligand and receptor can generally monitor epithelial integrity to promote tissue homeostasis.
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Affiliation(s)
- Geert de Vreede
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Stephan U Gerlach
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - David Bilder
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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28
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Antson H, Tõnissoo T, Shimmi O. The developing wing crossvein of Drosophila melanogaster: a fascinating model for signaling and morphogenesis. Fly (Austin) 2022; 16:118-127. [PMID: 35302430 PMCID: PMC8942417 DOI: 10.1080/19336934.2022.2040316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The Drosophila wing has been used as a model for studying tissue growth, morphogenesis and pattern formation. The wing veins of Drosophila are composed of two distinct structures, longitudinal veins and crossveins. Although positional information of longitudinal veins is largely defined in the wing imaginal disc during the larval stage, crossvein primordial cells appear to be naive until the early pupal stage. Here, we first review how wing crossveins have been investigated in the past. Then, the developmental mechanisms underlying crossvein formation are summarized. This review focuses on how a conserved trafficking mechanism of BMP ligands is utilized for crossvein formation, and how various co-factors play roles in sustaining BMP signalling. Recent findings further reveal that crossvein development serves as an excellent model to address how BMP signal and dynamic cellular processes are coupled. This comprehensive review illustrates the uniqueness, scientific value and future perspectives of wing crossvein development as a model.
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Affiliation(s)
- Hanna Antson
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Tambet Tõnissoo
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
| | - Osamu Shimmi
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia.,Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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29
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Ma R, Gong D, You H, Xu C, Lu Y, Bergers G, Werb Z, Klein OD, Petritsch CK, Lu P. LGL1 binds to Integrin β1 and inhibits downstream signaling to promote epithelial branching in the mammary gland. Cell Rep 2022; 38:110375. [PMID: 35172155 PMCID: PMC9113222 DOI: 10.1016/j.celrep.2022.110375] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 10/08/2021] [Accepted: 01/20/2022] [Indexed: 11/29/2022] Open
Abstract
Branching morphogenesis is a fundamental process by which organs in invertebrates and vertebrates form branches to expand their surface areas. The current dogma holds that directional cell migration determines where a new branch forms and thus patterns branching. Here, we asked whether mouse Lgl1, a homolog of the Drosophila tumor suppressor Lgl, regulates epithelial polarity in the mammary gland. Surprisingly, mammary glands lacking Lgl1 have normal epithelial polarity, but they form fewer branches. Moreover, we find that Lgl1 null epithelium is unable to directionally migrate, suggesting that migration is not essential for mammary epithelial branching as expected. We show that LGL1 binds to Integrin β1 and inhibits its downstream signaling, and Integrin β1 overexpression blocks epithelial migration, thus recapitulating the Lgl1 null phenotype. Altogether, we demonstrate that Lgl1 modulation of Integrin β1 signaling is essential for directional migration and that epithelial branching in invertebrates and the mammary gland is fundamentally distinct. Ma et al. show that Lgl1 is essential for mammary gland branching morphogenesis but not epithelial polarity. Lgl1 is required for directional migration by regulating Integrin β1 signaling levels and focal adhesion strengths. Finally, branching mechanisms are distinct between mammary gland and Drosophila systems where directional migration is indispensable.
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Affiliation(s)
- Rongze Ma
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Difei Gong
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Huanyang You
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Chongshen Xu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Yunzhe Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Gabriele Bergers
- VIB-KU Leuven Center for Cancer Biology, Department of Oncology, KU Leuven, 3000 Leuven, Belgium
| | - Zena Werb
- Department of Anatomy and Program in Developmental and Stem Cell Biology, University of California, San Francisco, San Francisco, CA 94143-0452, USA
| | - Ophir D Klein
- Department of Orofacial Sciences and Program in Craniofacial Biology, University of California, San Francisco, UCSF Box 0422, 513 Parnassus Avenue, HSE1508, San Francisco, CA 94143-0422, USA
| | - Claudia K Petritsch
- Department of Neurological Surgery, Stanford University, Palo Alto, CA 94305, USA
| | - Pengfei Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China.
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30
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Troyanovsky RB, Indra I, Kato R, Mitchell BJ, Troyanovsky SM. Basolateral protein Scribble binds phosphatase PP1 to establish a signaling network maintaining apicobasal polarity. J Biol Chem 2021; 297:101289. [PMID: 34634305 PMCID: PMC8569552 DOI: 10.1016/j.jbc.2021.101289] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 01/25/2023] Open
Abstract
Scribble, a member of the LAP protein family, contributes to the apicobasal polarity (ABP) of epithelial cells. The LAP-unique region of these proteins, which is essential and sufficient for ABP, includes a conserved Leucine-Rich Repeat (LRR) domain. The major binding partners of this region that could regulate ABP remain unknown. Here, using proteomics, native gel electrophoresis, and site-directed mutagenesis, we show that the concave surface of LRR domain in Scribble participates in three types of mutually exclusive interactions-(i) homodimerization, serving as an auto-inhibitory mechanism; (ii) interactions with a diverse set of polarity proteins, such as Llgl1, Llgl2, EPB41L2, and EPB41L5, which produce distinct multiprotein complexes; and (iii) a direct interaction with the protein phosphatase, PP1. Analogy with the complex between PP1 and LRR domain of SDS22, a well-studied PP1 regulator, suggests that the Scibble-PP1 complex stores a latent form of PP1 in the basolateral cell cortex. Such organization may generate a dynamic signaling network wherein PP1 could be dispatched from the complex with Scribble to particular protein ligands, achieving fast dephosphorylation kinetics.
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Affiliation(s)
- Regina B Troyanovsky
- Department of Dermatology, The Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Indrajyoti Indra
- Department of Dermatology, The Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Rei Kato
- Department of Dermatology, The Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Brian J Mitchell
- Department of Cell & Developmental Biology, The Feinberg School of Medicine, Chicago, Illinois, USA
| | - Sergey M Troyanovsky
- Department of Dermatology, The Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA; Department of Cell & Developmental Biology, The Feinberg School of Medicine, Chicago, Illinois, USA.
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31
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Sharp KA, Khoury MJ, Wirtz-Peitz F, Bilder D. Evidence for a nuclear role for Drosophila Dlg as a regulator of the NURF complex. Mol Biol Cell 2021; 32:ar23. [PMID: 34495684 PMCID: PMC8693970 DOI: 10.1091/mbc.e21-04-0187] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Scribble (Scrib), Discs-large (Dlg), and Lethal giant larvae (Lgl) are basolateral regulators of epithelial polarity and tumor suppressors whose molecular mechanisms of action remain unclear. We used proximity biotinylation to identify proteins localized near Dlg in the Drosophila wing imaginal disc epithelium. In addition to expected membrane- and cytoskeleton-associated protein classes, nuclear proteins were prevalent in the resulting mass spectrometry dataset, including all four members of the nucleosome remodeling factor (NURF) chromatin remodeling complex. Subcellular fractionation demonstrated a nuclear pool of Dlg and proximity ligation confirmed its position near the NURF complex. Genetic analysis showed that NURF activity is also required for the overgrowth of dlg tumors, and this growth suppression correlated with a reduction in Hippo pathway gene expression. Together, these data suggest a nuclear role for Dlg in regulating chromatin and transcription through a more direct mechanism than previously thought.
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Affiliation(s)
- Katherine A Sharp
- Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley CA 94720
| | - Mark J Khoury
- Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley CA 94720
| | | | - David Bilder
- Department of Molecular and Cell Biology, University of California-Berkeley, Berkeley CA 94720
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32
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Bilder D, Ong K, Hsi TC, Adiga K, Kim J. Tumour-host interactions through the lens of Drosophila. Nat Rev Cancer 2021; 21:687-700. [PMID: 34389815 PMCID: PMC8669834 DOI: 10.1038/s41568-021-00387-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/01/2021] [Indexed: 02/07/2023]
Abstract
There is a large gap between the deep understanding of mechanisms driving tumour growth and the reasons why patients ultimately die of cancer. It is now appreciated that interactions between the tumour and surrounding non-tumour (sometimes referred to as host) cells play critical roles in mortality as well as tumour progression, but much remains unknown about the underlying molecular mechanisms, especially those that act beyond the tumour microenvironment. Drosophila has a track record of high-impact discoveries about cell-autonomous growth regulation, and is well suited to now probe mysteries of tumour - host interactions. Here, we review current knowledge about how fly tumours interact with microenvironmental stroma, circulating innate immune cells and distant organs to influence disease progression. We also discuss reciprocal regulation between tumours and host physiology, with a particular focus on paraneoplasias. The fly's simplicity along with the ability to study lethality directly provide an opportunity to shed new light on how cancer actually kills.
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Affiliation(s)
- David Bilder
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA.
| | - Katy Ong
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Tsai-Ching Hsi
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Kavya Adiga
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Jung Kim
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
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33
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Nardella C, Visconti L, Malagrinò F, Pagano L, Bufano M, Nalli M, Coluccia A, La Regina G, Silvestri R, Gianni S, Toto A. Targeting PDZ domains as potential treatment for viral infections, neurodegeneration and cancer. Biol Direct 2021; 16:15. [PMID: 34641953 PMCID: PMC8506081 DOI: 10.1186/s13062-021-00303-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/24/2021] [Indexed: 02/08/2023] Open
Abstract
The interaction between proteins is a fundamental event for cellular life that is generally mediated by specialized protein domains or modules. PDZ domains are the largest class of protein-protein interaction modules, involved in several cellular pathways such as signal transduction, cell-cell junctions, cell polarity and adhesion, and protein trafficking. Because of that, dysregulation of PDZ domain function often causes the onset of pathologies, thus making this family of domains an interesting pharmaceutical target. In this review article we provide an overview of the structural and functional features of PDZ domains and their involvement in the cellular and molecular pathways at the basis of different human pathologies. We also discuss some of the strategies that have been developed with the final goal to hijack or inhibit the interaction of PDZ domains with their ligands. Because of the generally low binding selectivity of PDZ domain and the scarce efficiency of small molecules in inhibiting PDZ binding, this task resulted particularly difficult to pursue and still demands increasing experimental efforts in order to become completely feasible and successful in vivo.
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Affiliation(s)
- Caterina Nardella
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy
| | - Lorenzo Visconti
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy
| | - Francesca Malagrinò
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy
| | - Livia Pagano
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy
| | - Marianna Bufano
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Marianna Nalli
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Antonio Coluccia
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Giuseppe La Regina
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Romano Silvestri
- Laboratory Affiliated with the Institute Pasteur Italy - Cenci Bolognetti Foundation, Department of Drug Chemistry and Technologies, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy.
| | - Stefano Gianni
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy.
| | - Angelo Toto
- Istituto Pasteur - Fondazione Cenci Bolognetti, Dipartimento di Scienze Biochimiche "A. Rossi Fanelli" and Istituto di Biologia e Patologia Molecolari del CNR, Sapienza Università di Roma, 00185, Rome, Italy.
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34
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Kim J, Chuang HC, Wolf NK, Nicolai CJ, Raulet DH, Saijo K, Bilder D. Tumor-induced disruption of the blood-brain barrier promotes host death. Dev Cell 2021; 56:2712-2721.e4. [PMID: 34496290 DOI: 10.1016/j.devcel.2021.08.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/29/2021] [Accepted: 08/12/2021] [Indexed: 11/24/2022]
Abstract
Cancer patients often die from symptoms that manifest at a distance from any tumor. Mechanisms underlying these systemic physiological perturbations, called paraneoplastic syndromes, may benefit from investigation in non-mammalian systems. Using a non-metastatic Drosophila adult model, we find that malignant-tumor-produced cytokines drive widespread host activation of JAK-STAT signaling and cause premature lethality. STAT activity is particularly high in cells of the blood-brain barrier (BBB), where it induces aberrant BBB permeability. Remarkably, inhibiting STAT in the BBB not only rescues barrier function but also extends the lifespan of tumor-bearing hosts. We identify BBB damage in other pathological conditions that cause elevated inflammatory signaling, including obesity and infection, where BBB permeability also regulates host survival. IL-6-dependent BBB dysfunction is further seen in a mouse tumor model, and it again promotes host morbidity. Therefore, BBB alterations constitute a conserved lethal tumor-host interaction that also underlies other physiological morbidities.
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Affiliation(s)
- Jung Kim
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Hsiu-Chun Chuang
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Natalie K Wolf
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Christopher J Nicolai
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - David H Raulet
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Kaoru Saijo
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA; Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, CA 94720, USA
| | - David Bilder
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA.
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35
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Lu P, Lu Y. Born to Run? Diverse Modes of Epithelial Migration. Front Cell Dev Biol 2021; 9:704939. [PMID: 34540829 PMCID: PMC8448196 DOI: 10.3389/fcell.2021.704939] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 07/20/2021] [Indexed: 12/15/2022] Open
Abstract
Bundled with various kinds of adhesion molecules and anchored to the basement membrane, the epithelium has historically been considered as an immotile tissue and, to migrate, it first needs to undergo epithelial-mesenchymal transition (EMT). Since its initial description more than half a century ago, the EMT process has fascinated generations of developmental biologists and, more recently, cancer biologists as it is believed to be essential for not only embryonic development, organ formation, but cancer metastasis. However, recent progress shows that epithelium is much more motile than previously realized. Here, we examine the emerging themes in epithelial collective migration and how this has impacted our understanding of EMT.
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Affiliation(s)
- Pengfei Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yunzhe Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
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Human DLG1 and SCRIB Are Distinctly Regulated Independently of HPV-16 during the Progression of Oropharyngeal Squamous Cell Carcinomas: A Preliminary Analysis. Cancers (Basel) 2021; 13:cancers13174461. [PMID: 34503271 PMCID: PMC8430552 DOI: 10.3390/cancers13174461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/25/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022] Open
Abstract
Simple Summary The process of HPV-mediated oncogenesis in HNSCCs is not fully understood. DLG1 and SCRIB protein expression levels and localization changes were evaluated in a number of HPV16-positive and HPV-negative OPSCCs and seem to be associated with malignant transformation. Moreover, loss of SCRIB expression inversely correlates with higher grade tumors, and this is much more evident in the presence of HPV16 E6. This could serve as a potential marker in predicting development of OPSCCs. Abstract The major causative agents of head and neck squamous cell carcinomas (HNSCCs) are either environmental factors, such as tobacco and alcohol consumption, or infection with oncogenic human papillomaviruses (HPVs). An important aspect of HPV-induced oncogenesis is the targeting by the E6 oncoprotein of PDZ domain-containing substrates for proteasomal destruction. Tumor suppressors DLG1 and SCRIB are two of the principal PDZ domain-containing E6 targets. Both have been shown to play critical roles in the regulation of cell growth and polarity and in maintaining the structural integrity of the epithelia. We investigated how modifications in the cellular localization and protein expression of DLG1 and SCRIB in HPV16-positive and HPV-negative histologic oropharyngeal squamous cell carcinomas (OPSCC) might reflect disease progression. HPV presence was determined by p16 staining and HPV genotyping. Whilst DLG1 expression levels did not differ markedly between HPV-negative and HPV16-positive OPSCCs, it appeared to be relocated from cell–cell contacts to the cytoplasm in most samples, regardless of HPV16 positivity. This indicates that alterations in DLG1 distribution could contribute to malignant progression in OPSCCs. Interestingly, SCRIB was also relocated from cell–cell contacts to the cytoplasm in the tumor samples in comparison with normal tissue, regardless of HPV16 status, but in addition there was an obvious reduction in SCRIB expression in higher grade tumors. Strikingly, loss of SCRIB was even more pronounced in HPV16-positive OPSCCs. These alterations in SCRIB levels may contribute to transformation and loss of tissue architecture in the process of carcinogenesis and could potentially serve as markers in the development of OPSCCs.
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Dias Gomes M, Iden S. Orchestration of tissue-scale mechanics and fate decisions by polarity signalling. EMBO J 2021; 40:e106787. [PMID: 33998017 PMCID: PMC8204866 DOI: 10.15252/embj.2020106787] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 03/10/2021] [Accepted: 03/12/2021] [Indexed: 02/06/2023] Open
Abstract
Eukaryotic development relies on dynamic cell shape changes and segregation of fate determinants to achieve coordinated compartmentalization at larger scale. Studies in invertebrates have identified polarity programmes essential for morphogenesis; however, less is known about their contribution to adult tissue maintenance. While polarity-dependent fate decisions in mammals utilize molecular machineries similar to invertebrates, the hierarchies and effectors can differ widely. Recent studies in epithelial systems disclosed an intriguing interplay of polarity proteins, adhesion molecules and mechanochemical pathways in tissue organization. Based on major advances in biophysics, genome editing, high-resolution imaging and mathematical modelling, the cell polarity field has evolved to a remarkably multidisciplinary ground. Here, we review emerging concepts how polarity and cell fate are coupled, with emphasis on tissue-scale mechanisms, mechanobiology and mammalian models. Recent findings on the role of polarity signalling for tissue mechanics, micro-environmental functions and fate choices in health and disease will be summarized.
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Affiliation(s)
- Martim Dias Gomes
- CECAD Cluster of ExcellenceUniversity of CologneCologneGermany
- Cell and Developmental BiologyFaculty of MedicineCenter of Human and Molecular Biology (ZHMB)Saarland UniversityHomburgGermany
| | - Sandra Iden
- CECAD Cluster of ExcellenceUniversity of CologneCologneGermany
- Cell and Developmental BiologyFaculty of MedicineCenter of Human and Molecular Biology (ZHMB)Saarland UniversityHomburgGermany
- CMMCUniversity of CologneCologneGermany
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Leng S, Xie F, Liu J, Shen J, Quan G, Wen T. LLGL2 Increases Ca 2+ Influx and Exerts Oncogenic Activities via PI3K/AKT Signaling Pathway in Hepatocellular Carcinoma. Front Oncol 2021; 11:683629. [PMID: 34178676 PMCID: PMC8223678 DOI: 10.3389/fonc.2021.683629] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 05/20/2021] [Indexed: 02/05/2023] Open
Abstract
Background Lethal giant larvae (Lgl), scaffolding proteins, regulate the epithelial cell apicobasal polarity in Drosophila. They play important roles in asymmetric cell division, cell migration, and progenitor cells self-renewal as tumor suppressors. One of Lgl mammalian homologues proteins, LLGL2 overexpression has been reported in ER+ breast cancer and promotes tumor proliferation through regulating leucine uptake. Nonetheless, the role of LLGL2 in hepatocellular carcinoma (HCC) is still unknown. Methods TCGA dataset mining, qRT-PCR, Western blot along with immunohistochemistry assays were employed to explore LLGL2 expression in human HCC samples and cell lines. Moreover, the clinical value of LLGL2 was investigated in 156 HCC patients. Furthermore, the role as well as the molecular mechanism of LLGL2 in the progression of HCC was explored through a series of in vitro and in vivo experiments. Results LLGL2 was up-regulated in HCC tissues, which was related with certain clinicopathological features including tumor number, vascular invasion as well as advanced stage. High expression of LLGL2 predicted poor prognosis after hepatectomy. LLGL2 promoted HCC cells proliferation, migration and invasion through PI3K/ATK signaling by promoting calcium ion influx. Conclusion Our study identified that LLGL2 is a tumor promoter in HCC for the first time, which could potentially be utilized as a new biomarker and a therapeutic target for HCC.
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Affiliation(s)
- Shusheng Leng
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China.,General Surgery Department, Affiliated Hospital/Clinical Medical College of Chengdu University, Chengdu, China
| | - Fei Xie
- Department of Hepatobiliary, Pancreatic and Splenic Surgery, The First People's Hospital of Neijiang City, Neijiang, China
| | - Junyi Liu
- Central Laboratory, Affiliated Hospital/Clinical Medical College of Chengdu University, Chengdu, China
| | - Junyi Shen
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Guangqian Quan
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Tianfu Wen
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
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Wong KC, Sankaran S, Jayapalan JJ, Subramanian P, Abdul-Rahman PS. Melatonin improves cognitive behavior, oxidative stress, and metabolism in tumor-prone lethal giant larvae mutant of Drosophila melanogaster. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2021; 107:e21785. [PMID: 33818826 DOI: 10.1002/arch.21785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/24/2021] [Accepted: 03/14/2021] [Indexed: 06/12/2023]
Abstract
Mutant lethal giant larvae (lgl) flies (Drosophila melanogaster) are known to develop epithelial tumors with invasive characteristics. The present study has been conducted to investigate the influence of melatonin (0.025 mM) on behavioral responses of lgl mutant flies as well as on biochemical indices (redox homeostasis, carbohydrate and lipid metabolism, transaminases, and minerals) in hemolymph, and head and intestinal tissues. Behavioral abnormalities were quantitatively observed in lgl flies but were found normalized among melatonin-treated lgl flies. Significantly decreased levels of lipid peroxidation products and antioxidants involved in redox homeostasis were observed in hemolymph and tissues of lgl flies, but had restored close to normalcy in melatonin-treated flies. Carbohydrates including glucose, trehalose, and glycogen were decreased and increased in the hemolymph and tissues of lgl and melatonin-treated lgl flies, respectively. Key enzymes of carbohydrate metabolism showed a significant increment in their levels in lgl mutants but had restored close to wild-type baseline levels in melatonin-treated flies. Variables of lipid metabolism showed significantly inverse levels in hemolymph and tissues of lgl flies, while normalization of most of these variables was observed in melatonin-treated mutants. Lipase, chitinase, transaminases, and alkaline phosphatase showed an increment in their activities and minerals exhibited decrement in lgl flies; reversal of changes was observed under melatonin treatment. The impairment of cognition, disturbance of redox homeostasis and metabolic reprogramming in lgl flies, and restoration of normalcy in all these cellular and behavioral processes indicate that melatonin could act as oncostatic and cytoprotective agents in Drosophila.
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Affiliation(s)
- Kar-Cheng Wong
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Srivani Sankaran
- Department of Biochemistry and Biotechnology, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Jaime J Jayapalan
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- University of Malaya Centre for Proteomics Research (UMCPR), University of Malaya, Kuala Lumpur, Malaysia
| | - Perumal Subramanian
- Department of Biochemistry and Biotechnology, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Puteri S Abdul-Rahman
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
- University of Malaya Centre for Proteomics Research (UMCPR), University of Malaya, Kuala Lumpur, Malaysia
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Shen H, Huang C, Wu J, Li J, Hu T, Wang Z, Zhang H, Shao Y, Fu Z. SCRIB Promotes Proliferation and Metastasis by Targeting Hippo/YAP Signalling in Colorectal Cancer. Front Cell Dev Biol 2021; 9:656359. [PMID: 33937255 PMCID: PMC8084105 DOI: 10.3389/fcell.2021.656359] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/24/2021] [Indexed: 12/24/2022] Open
Abstract
The complex in which scribble planar cell polarity protein (SCRIB) is located is one of the three main polar protein complexes that play an important role in maintaining epithelial polarity and affecting tumour growth. However, the role of SCRIB in colorectal cancer (CRC) remains largely unknown. This study used date from The Cancer Genome Atlas (TCGA) and clinical samples to determine the expression of SCRIB in CRC and explored its mechanism through bioinformatics analysis and in vivo and in vitro experiments. In this study, SCRIB was found to be highly expressed in CRC patients, and it was often associated with malignant characteristics, such as proliferation, apoptosis, and epithelial-mesenchymal transition (EMT). Furthermore, we found that SCRIB may interact with the Hippo signalling pathway and affect the phosphorylation of YAP and its distribution inside and outside of the nucleus. We concluded that increased expression of SCRIB is likely to inhibit the Hippo signalling pathway by promoting YAP phosphorylation. This role of SCRIB in the progression of CRC provides an important information for the treatment of CRC.
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Affiliation(s)
- Hengyang Shen
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Changzhi Huang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Jingyu Wu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Jie Li
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Tao Hu
- Department of General Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Zhenling Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Hongqiang Zhang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Yu Shao
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
| | - Zan Fu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, Nanjing, China
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Mirzaei S, Mohammadi AT, Gholami MH, Hashemi F, Zarrabi A, Zabolian A, Hushmandi K, Makvandi P, Samec M, Liskova A, Kubatka P, Nabavi N, Aref AR, Ashrafizadeh M, Khan H, Najafi M. Nrf2 signaling pathway in cisplatin chemotherapy: Potential involvement in organ protection and chemoresistance. Pharmacol Res 2021; 167:105575. [PMID: 33771701 DOI: 10.1016/j.phrs.2021.105575] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/20/2021] [Accepted: 03/21/2021] [Indexed: 12/14/2022]
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a vital transcription factor and its induction is of significant importance for protecting against oxidative damage. Increased levels of Reactive Oxygen Species (ROS) stimulate Nrf2 signaling, enhancing the activity of antioxidant enzymes such as catalase, superoxide dismutase and glutathione peroxidase. These enzymes are associated with retarding oxidative stress. On the other hand, Nrf2 activation in cancer cells is responsible for the development of chemoresistance due to disrupting oxidative mediated-cell death by reducing ROS levels. Cisplatin (CP), cis-diamminedichloroplatinum(II), is a potent anti-tumor agent extensively used in cancer therapy, but its frequent application leads to the development of chemoresistance as well. In the present study, association of Nrf2 signaling with chemoresistance to CP and protection against its deleterious effects is discussed. Anti-tumor compounds, mainly phytochemicals, retard chemoresistance by suppressing Nrf2 signaling. Upstream mediators such as microRNAs can regulate Nrf2 expression during CP chemotherapy regimens. Protection against side effects of CP is mediated via activating Nrf2 signaling and its downstream targets activating antioxidant defense system. Protective agents that activate Nrf2 signaling, can ameliorate CP-mediated ototoxicity, nephrotoxicity and neurotoxicity. Reducing ROS levels and preventing cell death are the most important factors involved in alleviating CP toxicity upon Nrf2 activation. As pre-clinical experiments advocate the role of Nrf2 in chemoprotection and CP resistance, translating these findings to the clinic can provide a significant progress in treatment of cancer patients.
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Affiliation(s)
- Sepideh Mirzaei
- Department of Biology, Faculty of Science, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Aliasghar Tabatabaei Mohammadi
- Asu Vanda Gene Research Company, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Farhikhtegan Medical Convergence Science Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | | | - Farid Hashemi
- Department of Comparative Biosciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Ali Zarrabi
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, 34956 Istanbul, Turkey
| | - Amirhossein Zabolian
- Young Researchers and Elite Club, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Kiavash Hushmandi
- Department of Food Hygiene and Quality Control, Division of Epidemiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Pooyan Makvandi
- Centre for Materials Interface, Istituto Italiano di Tecnologia, viale Rinaldo Piaggio 34, 56025 Pisa, Pontedera, Italy
| | - Marek Samec
- Department of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Alena Liskova
- Department of Obstetrics and Gynecology, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Peter Kubatka
- Department of Medical Biology, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Noushin Nabavi
- Department of Urological Sciences and Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, V6H3Z6 Canada
| | - Amir Reza Aref
- Belfer Center for Applied Cancer Science, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA; Department of Translational Sciences, Xsphera Biosciences Inc., Boston, MA, USA
| | - Milad Ashrafizadeh
- Sabanci University Nanotechnology Research and Application Center (SUNUM), Tuzla, 34956 Istanbul, Turkey; Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey.
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan.
| | - Masoud Najafi
- Medical Technology Research Center, Institute of Health Technology, Kermanashah University of Medical Sciences, Kermanshah 6715847141, Iran; Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Rice C, De O, Alhadyian H, Hall S, Ward RE. Expanding the Junction: New Insights into Non-Occluding Roles for Septate Junction Proteins during Development. J Dev Biol 2021; 9:11. [PMID: 33801162 PMCID: PMC8006247 DOI: 10.3390/jdb9010011] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 12/17/2022] Open
Abstract
The septate junction (SJ) provides an occluding function for epithelial tissues in invertebrate organisms. This ability to seal the paracellular route between cells allows internal tissues to create unique compartments for organ function and endows the epidermis with a barrier function to restrict the passage of pathogens. Over the past twenty-five years, numerous investigators have identified more than 30 proteins that are required for the formation or maintenance of the SJs in Drosophila melanogaster, and have determined many of the steps involved in the biogenesis of the junction. Along the way, it has become clear that SJ proteins are also required for a number of developmental events that occur throughout the life of the organism. Many of these developmental events occur prior to the formation of the occluding junction, suggesting that SJ proteins possess non-occluding functions. In this review, we will describe the composition of SJs, taking note of which proteins are core components of the junction versus resident or accessory proteins, and the steps involved in the biogenesis of the junction. We will then elaborate on the functions that core SJ proteins likely play outside of their role in forming the occluding junction and describe studies that provide some cell biological perspectives that are beginning to provide mechanistic understanding of how these proteins function in developmental contexts.
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Affiliation(s)
- Clinton Rice
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS 66045, USA; (C.R.); (H.A.)
| | - Oindrila De
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA;
| | - Haifa Alhadyian
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS 66045, USA; (C.R.); (H.A.)
| | | | - Robert E. Ward
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA;
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LSR Promotes Cell Proliferation and Invasion in Lung Cancer. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2021; 2021:6651907. [PMID: 33763152 PMCID: PMC7964108 DOI: 10.1155/2021/6651907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/20/2021] [Accepted: 02/26/2021] [Indexed: 11/17/2022]
Abstract
The lipolysis-stimulated lipoprotein receptor (LSR) displays an important regulatory role in cancer. However, the association between LSR and lung cancer is still elusive. Here, the candidate oncogene LSR on Ch.9q was obtained and assessed by bioinformatics analysis of The Cancer Genome Atlas (TCGA) dataset of lung cancer. We conducted clinical pathology and survival analysis based on the lung cancer database. We assessed the biological effects of LSR in lung cancer cells on cell proliferation. Our data indicated that LSR was upregulated in lung cancer cells. Meanwhile, LSR was identified in this study to be a poor prognostic factor, and its high expression exhibited relations with grades, stages, and nodal metastasis status. Using in vitro analysis, our data revealed that LSR could promote lung cancer progression by regulating cell proliferation, migration, and invasion. In our study, our data demonstrated that LSR was a tumor promoter for lung cancer and was a potential biomarker and target for lung cancer prognosis and treatment.
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Rackley B, Seong CS, Kiely E, Parker RE, Rupji M, Dwivedi B, Heddleston JM, Giang W, Anthony N, Chew TL, Gilbert-Ross M. The level of oncogenic Ras determines the malignant transformation of Lkb1 mutant tissue in vivo. Commun Biol 2021; 4:142. [PMID: 33514834 PMCID: PMC7846793 DOI: 10.1038/s42003-021-01663-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 01/06/2021] [Indexed: 01/30/2023] Open
Abstract
The genetic and metabolic heterogeneity of RAS-driven cancers has confounded therapeutic strategies in the clinic. To address this, rapid and genetically tractable animal models are needed that recapitulate the heterogeneity of RAS-driven cancers in vivo. Here, we generate a Drosophila melanogaster model of Ras/Lkb1 mutant carcinoma. We show that low-level expression of oncogenic Ras (RasLow) promotes the survival of Lkb1 mutant tissue, but results in autonomous cell cycle arrest and non-autonomous overgrowth of wild-type tissue. In contrast, high-level expression of oncogenic Ras (RasHigh) transforms Lkb1 mutant tissue resulting in lethal malignant tumors. Using simultaneous multiview light-sheet microcopy, we have characterized invasion phenotypes of Ras/Lkb1 tumors in living larvae. Our molecular analysis reveals sustained activation of the AMPK pathway in malignant Ras/Lkb1 tumors, and demonstrate the genetic and pharmacologic dependence of these tumors on CaMK-activated Ampk. We further show that LKB1 mutant human lung adenocarcinoma patients with high levels of oncogenic KRAS exhibit worse overall survival and increased AMPK activation. Our results suggest that high levels of oncogenic KRAS is a driving event in the malignant transformation of LKB1 mutant tissue, and uncovers a vulnerability that may be used to target this aggressive genetic subset of RAS-driven tumors.
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Affiliation(s)
- Briana Rackley
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA
- Cancer Biology Graduate Program, Emory University, Atlanta, GA, USA
| | - Chang-Soo Seong
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA
| | - Evan Kiely
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA
- Winship Research Informatics, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Rebecca E Parker
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA
- Cancer Biology Graduate Program, Emory University, Atlanta, GA, USA
| | - Manali Rupji
- Biostatistics Shared Resource, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - Bhakti Dwivedi
- Bioinformatics and Systems Biology Shared Resource, Winship Cancer Institute of Emory University, Atlanta, GA, USA
| | - John M Heddleston
- Advanced Imaging Center, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - William Giang
- Integrated Cellular Imaging Core, Emory University School of Medicine, Emory University, Atlanta, GA, USA
| | - Neil Anthony
- Integrated Cellular Imaging Core, Emory University School of Medicine, Emory University, Atlanta, GA, USA
| | - Teng-Leong Chew
- Advanced Imaging Center, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Melissa Gilbert-Ross
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA.
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Greenland NY, Cowan JE, Chan E, Carroll PR, Stohr BA, Simko JP. Prostate biopsy histopathologic features correlate with a commercial gene expression assay's reclassification of patient NCCN risk category. Prostate 2020; 80:1421-1428. [PMID: 32946625 DOI: 10.1002/pros.24072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/01/2020] [Accepted: 09/04/2020] [Indexed: 11/09/2022]
Abstract
BACKGROUND For biopsies with Gleason 3 + 3 = 6 or 3 + 4 = 7 prostate cancer, the Genomic Prostate Score (GPS; OncotypeDx) is designed to predict severe pathology at prostatectomy, and, in some cases, recommends reclassification of the National Comprehensive Cancer Network (NCCN) risk category. We hypothesized that certain histopathologic features that were not considered in the original design of the assay actually would be associated with the NCCN risk category change indicated by GPS testing. METHODS For patients with recommended NCCN risk category change, the biopsy cores used for GPS were re-reviewed for stromal reaction, chronic inflammation, and tumor nuclear polarization. RESULTS Of 520 patients from May 2011 to December 2018, GPS testing suggested NCCN risk reclassification in 131 (25%); 127 of these slides were available. Of these, the NCCN risk category increased from intermediate to high in 8, low to intermediate in 15, very low to low in 1, and decreased from intermediate to low in 32, and low to very low in 71. Biopsies with NCCN risk increase were associated with moderate or severe stromal reaction (p < .001) and chronic inflammation (p < .001); biopsies with NCCN risk decrease were associated with absence of these features. In Gleason 3 + 3 = 6 cases (n = 93), presence of nuclear polarization was associated with NCCN risk decrease and its absence with increase (p < .001). CONCLUSIONS Moderate or severe stromal reaction, chronic inflammation, and lack of nuclear polarization in Gleason score 3 + 3 = 6 tumors were each associated with an increase in NCCN risk category indicated by GPS and vice versa. Our results suggest that GPS captures histologic features associated with aggressiveness that are not routinely assessed in standard histopathologic assessments, and that consideration of such histologic features may improve upon current tumor grading approaches.
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Affiliation(s)
- Nancy Y Greenland
- Department of Anatomic Pathology, University of California, San Francisco, California, USA
- Department of Anatomic Pathology, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - Janet E Cowan
- Department of Urology, University of California, San Francisco, California, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
| | - Emily Chan
- Department of Anatomic Pathology, University of California, San Francisco, California, USA
| | - Peter R Carroll
- Department of Urology, University of California, San Francisco, California, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
| | - Bradley A Stohr
- Department of Anatomic Pathology, University of California, San Francisco, California, USA
| | - Jeffry P Simko
- Department of Anatomic Pathology, University of California, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, California, USA
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, California, USA
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Cell polarity and oncogenesis: common mutations contribute to altered cellular polarity and promote malignancy. THE NUCLEUS 2020. [DOI: 10.1007/s13237-020-00313-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Kanda H, Igaki T. Mechanism of tumor-suppressive cell competition in flies. Cancer Sci 2020; 111:3409-3415. [PMID: 32677169 PMCID: PMC7541003 DOI: 10.1111/cas.14575] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/12/2020] [Accepted: 06/19/2020] [Indexed: 12/16/2022] Open
Abstract
Oncogenic mutations often trigger antitumor cellular response such as induction of apoptosis or cellular senescence. Studies in the last decade have identified the presence of the third guardian against mutation‐induced tumorigenesis, namely “cell competition.” Cell competition is a context‐dependent cell elimination whereby cells with higher fitness eliminate neighboring cells with lower fitness by inducing cell death. While oncogene‐induced apoptosis or oncogene‐induced senescence acts as a cell‐autonomous tumor suppressor, cell competition protects the tissue from tumorigenesis via cell‐cell communication. For instance, in Drosophila epithelium, oncogenic cells with cell polarity mutations overproliferate and develop into tumors on their own but are eliminated from the tissue when surrounded by wild‐type cells. Genetic studies in flies have unraveled that such tumor‐suppressive cell competition is regulated by at least three mechanisms: direct cell‐cell interaction between polarity‐deficient cells and wild‐type cells, secreted factors from epithelial cells, and systemic factors from distant organs. Molecular manipulation of tumor‐suppressive cell competition could provide a novel therapeutic strategy against human cancers.
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Affiliation(s)
- Hiroshi Kanda
- Laboratory of Genetics, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Tatsushi Igaki
- Laboratory of Genetics, Graduate School of Biostudies, Kyoto University, Kyoto, Japan
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Abedrabbo M, Ravid S. Scribble, Lgl1, and myosin II form a complex in vivo to promote directed cell migration. Mol Biol Cell 2020; 31:2234-2248. [PMID: 32697665 PMCID: PMC7550706 DOI: 10.1091/mbc.e19-11-0657] [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] [Indexed: 01/11/2023] Open
Abstract
Scribble (Scrib) and Lethal giant larvae 1 (Lgl1) are conserved polarity proteins that play important roles in different forms of cell polarity. The roles of Scrib and Lgl1 in apical-basal cell polarity have been studied extensively, but little is known about their roles in the cell polarity of migrating cells. Furthermore, the effect of Scrib and Lgl1 interaction on cell polarity is largely unknown. In this study, we show that Scrib, through its leucine-rich repeat domain, forms a complex in vivo with Lgl1. Scrib also forms a complex with myosin II, and Scrib, Lgl1, and myosin II colocalize at the leading edge of migrating cells. The cellular localization and the cytoskeletal association of Scrib and Lgl1 are interdependent, as depletion of either protein affects its counterpart. In addition, depletion of either Scrib or Lgl1 disrupts the cellular localization of myosin II. We show that depletion of either Scrib or Lgl1 affects cell adhesion through the inhibition of focal adhesion disassembly. Finally, we show that Scrib and Lgl1 are required for proper cell polarity of migrating cells. These results provide new insights into the mechanism regulating the cell polarity of migrating cells by Scrib, Lgl1, and myosin II.
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Affiliation(s)
- Maha Abedrabbo
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel
| | - Shoshana Ravid
- Department of Biochemistry and Molecular Biology, The Institute of Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel
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Centrosome Aurora A gradient ensures single polarity axis in C. elegans embryos. Biochem Soc Trans 2020; 48:1243-1253. [PMID: 32597472 DOI: 10.1042/bst20200298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/25/2020] [Accepted: 06/08/2020] [Indexed: 01/31/2023]
Abstract
Cellular asymmetries are vital for generating cell fate diversity during development and in stem cells. In the newly fertilized Caenorhabditis elegans embryo, centrosomes are responsible for polarity establishment, i.e. anterior-posterior body axis formation. The signal for polarity originates from the centrosomes and is transmitted to the cell cortex, where it disassembles the actomyosin network. This event leads to symmetry breaking and the establishment of distinct domains of evolutionarily conserved PAR proteins. However, the identity of an essential component that localizes to the centrosomes and promotes symmetry breaking was unknown. Recent work has uncovered that the loss of Aurora A kinase (AIR-1 in C. elegans and hereafter referred to as Aurora A) in the one-cell embryo disrupts stereotypical actomyosin-based cortical flows that occur at the time of polarity establishment. This misregulation of actomyosin flow dynamics results in the occurrence of two polarity axes. Notably, the role of Aurora A in ensuring a single polarity axis is independent of its well-established function in centrosome maturation. The mechanism by which Aurora A directs symmetry breaking is likely through direct regulation of Rho-dependent contractility. In this mini-review, we will discuss the unconventional role of Aurora A kinase in polarity establishment in C. elegans embryos and propose a refined model of centrosome-dependent symmetry breaking.
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Lee SR, Hong ST, Choi KW. Regulation of epithelial integrity and organ growth by Tctp and Coracle in Drosophila. PLoS Genet 2020; 16:e1008885. [PMID: 32559217 PMCID: PMC7329144 DOI: 10.1371/journal.pgen.1008885] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/01/2020] [Accepted: 05/25/2020] [Indexed: 01/28/2023] Open
Abstract
Regulation of cell junctions is crucial for the integrity of epithelial tissues and organs. Cell junctions also play roles in controlling cell proliferation for organ growth. Translationally controlled tumor protein (TCTP) is a conserved protein involved in growth control, but its role in cell junctions is unknown. Here we show that Drosophila Tctp directly interacts with the septate junction protein Coracle (Cora) to regulate epithelial integrity and organ growth. Tctp localizes together with Cora in the epidermis of the embryo. Loss of Cora reduces the level of Tctp in the epidermis but not vice versa. cora/+ or Tctp/+ single heterozygotes develop normally to adulthood. However, double heterozygotes for cora and Tctp mutations show severe disruption of epithelia causing synthetic lethality in the embryo. Double knockdown of Cora and Tctp in eye imaginal disc synergistically leads to disruption of the eye disc, resulting in a severe reduction or loss of eye and head. Conversely, double knockdown of Cora and Tctp in wing disc causes overgrowth as well as cell death. Inhibition of cell death under this condition causes hyperplastic growth of the wing disc. Tctp also shows direct and functional interaction with Cora-associated factors like Yurt and Na+/K+-ATPase. This study suggests that proper levels of Tctp and Cora are essential for the maintenance of the Cora complex and the integrity of epithelia. Our data also provide evidence that both Cora and Tctp are required to suppress overgrowth in developing wing. Organ growth depends on intercellular signaling for cell proliferation. Accumulating evidence indicates that tissue growth is also regulated by cell junctions. Translationally controlled tumor protein (TCTP) is an evolutionarily conserved protein family implicated in cancer. In Drosophila, Tctp is required for diverse cytoplasmic and nuclear functions including organ growth, DNA repair, and chromatin regulation during development. However, it is unknown whether Tctp plays an additional role in cell junctions at the membrane. Here we show that Tctp localizes together with the FERM domain protein Coracle (Cora) at the basolateral septate junctions in some tissues. Our data suggest that Cora is required for the maintenance of Tctp in the cell membrane but not vice versa. Tctp forms a complex with Cora, and the mutations in cora and Tctp genes show synergistic genetic interaction in the embryo and developing organs. Remarkably, the reduction of Cora and Tctp can induce massive overgrowth in the wing. We propose that the direct interaction of Tctp with the Cora junction complex is required for epithelial integrity and organ growth during development.
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Affiliation(s)
- Sung-Ryeong Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sung-Tae Hong
- Department of Anatomy & Cell Biology, Department of Medical Science, College of Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Kwang-Wook Choi
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
- * E-mail:
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