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Jin Y, Xue J. Lipid kinases PIP5Ks and PIP4Ks: potential drug targets for breast cancer. Front Oncol 2023; 13:1323897. [PMID: 38156113 PMCID: PMC10753794 DOI: 10.3389/fonc.2023.1323897] [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: 10/18/2023] [Accepted: 11/29/2023] [Indexed: 12/30/2023] Open
Abstract
Phosphoinositides, a small group of lipids found in all cellular membranes, have recently garnered heightened attention due to their crucial roles in diverse biological processes and different diseases. Among these, phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), the most abundant bis-phosphorylated phosphoinositide within the signaling system, stands notably connected to breast cancer. Not only does it serve as a key activator of the frequently altered phosphatidylinositol 3-kinase (PI3K) pathway in breast cancer, but also its conversion to phosphatidylinositol-3,4,5-triphosphate (PI(3,4,5)P3) is an important direction for breast cancer research. The generation and degradation of phosphoinositides intricately involve phosphoinositide kinases. PI(4,5)P2 generation emanates from the phosphorylation of PI4P or PI5P by two lipid kinase families: Type I phosphatidylinositol-4-phosphate 5-kinases (PIP5Ks) and Type II phosphatidylinositol-5-phosphate 4-kinases (PIP4Ks). In this comprehensive review, we focus on these two lipid kinases and delineate their compositions and respective cellular localization. Moreover, we shed light on the expression patterns and functions of distinct isoforms of these kinases in breast cancer. For a deeper understanding of their functional dynamics, we expound upon various mechanisms governing the regulation of PIP5Ks and PIP4Ks activities. A summary of effective and specific small molecule inhibitors designed for PIP5Ks or PIP4Ks are also provided. These growing evidences support PIP5Ks and PIP4Ks as promising drug targets for breast cancer.
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Affiliation(s)
- Yue Jin
- Department of Molecular Diagnosis, Northern Jiangsu People’s Hospital, Yangzhou University Clinical Medical College, Yangzhou, China
| | - Jian Xue
- Department of Emergency Medicine, Yizheng People’s Hospital, Yangzhou University Clinical Medical College, Yangzhou, China
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Zhu J, Zhang J, Hu P, Fan M, Song D, Yin H, Yan P, Xian S, Li Z, Guo J, Long C, Xu R, Huang R, Meng T, Zhang J, Huang Z. Identification of Bone Metastatic and Prognostic Alternative Splicing Signatures in Prostate Adenocarcinoma. Biochem Genet 2023; 61:2242-2259. [PMID: 37010714 PMCID: PMC10665256 DOI: 10.1007/s10528-023-10367-z] [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: 07/11/2021] [Accepted: 08/07/2022] [Indexed: 04/04/2023]
Abstract
As the most common nonepithelial malignancy, prostate adenocarcinoma (PRAD) is the fifth chief cause of cancer mortality in men. Distant metastasis often occurs in advanced PRAD and most patients are dying from it. However, the mechanism of PRAD progression and metastasis is still unclear. It's widely reported that more than 94% of genes are selectively splicing in humans and many isoforms are particularly related with cancer progression and metastasis. Spliceosome mutations occur in a mutually exclusive manner in breast cancer, and different components of spliceosomes are targets of somatic mutations in different types of breast cancer. Existing evidence strongly supports the key role of alternative splicing in breast cancer biology, and innovative tools are being developed to use splicing events for diagnostic and therapeutic purposes. In order to identify if the PRAD metastasis is associated with alternative splicing events (ASEs), the RNA sequencing data and ASEs data of 500 PRAD patients were retrieved from The Cancer Genome Atlas (TCGA) and TCGASpliceSeq databases. By Lasso regression, five genes were screened to construct the prediction model, with a good reliability by ROC curve. Additionally, results in both univariate and multivariate Cox regression analysis confirmed the well prognosis efficacy of the prediction model (both P < 0.001). Moreover, a potential splicing regulatory network was established and after multiple-database validation, we supposed that the signaling axis of HSPB1 up-regulating the PIP5K1C - 46,721 - AT (P < 0.001) might mediate the tumorigenesis, progression and metastasis of PRAD via the key members of Alzheimer's disease pathway (SRC, EGFR, MAPT, APP and PRKCA) (P < 0.001).
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Affiliation(s)
- Jiwen Zhu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, 1 East Jianshe Road, Zhengzhou, 450052, China
- Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, 200065, China
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Jiayao Zhang
- School of Mathematical Sciences of Tongji University, Shanghai, 200092, China
| | - Peng Hu
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, 1 East Jianshe Road, Zhengzhou, 450052, China
| | - Mingxiang Fan
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Dianwen Song
- Department of Orthopedics, School of Medicine, Shanghai General Hospital, Shanghai Jiaotong University, 100 Haining Road, Shanghai, 200065, China
| | - Huabin Yin
- Department of Orthopedics, School of Medicine, Shanghai General Hospital, Shanghai Jiaotong University, 100 Haining Road, Shanghai, 200065, China
| | - Penghui Yan
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, 1 East Jianshe Road, Zhengzhou, 450052, China
| | - Shuyuan Xian
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Zhenyu Li
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Juanru Guo
- School of Mathematical Sciences of Tongji University, Shanghai, 200092, China
| | - Chunling Long
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Runping Xu
- Tongji University School of Medicine, Shanghai, 200092, China
| | - Runzhi Huang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, 1 East Jianshe Road, Zhengzhou, 450052, China.
- Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, 200065, China.
- Tongji University School of Medicine, Shanghai, 200092, China.
| | - Tong Meng
- Division of Spine, Department of Orthopedics, Tongji Hospital affiliated to Tongji University School of Medicine, Shanghai, 200065, China.
- Department of Orthopedics, School of Medicine, Shanghai General Hospital, Shanghai Jiaotong University, 100 Haining Road, Shanghai, 200065, China.
| | - Jie Zhang
- Tongji University School of Medicine, Shanghai, 200092, China.
- Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, 201204, China.
| | - Zongqiang Huang
- Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, 1 East Jianshe Road, Zhengzhou, 450052, China.
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Chen C, Chen M, Wen T, Anderson RA, Cryns VL. Regulation of NRF2 by Phosphoinositides and Small Heat Shock Proteins. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.26.564194. [PMID: 37961303 PMCID: PMC10634847 DOI: 10.1101/2023.10.26.564194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Reactive oxygen species (ROS) are generated by aerobic metabolism, and their deleterious effects are buffered by the cellular antioxidant response, which prevents oxidative stress. The nuclear factor erythroid 2-related factor 2 (NRF2) is a master transcriptional regulator of the antioxidant response. Basal levels of NRF2 are kept low by ubiquitin-dependent degradation of NRF2 by E3 ligases, including the Kelch-like ECH-associated protein 1 (KEAP1). Here, we show that the stability and function of NRF2 is regulated by the type I phosphatidylinositol phosphate kinase g (PIPKIg), which binds NRF2 and transfers its product phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P 2 ) to NRF2. PtdIns(4,5)P 2 binding recruits the small heat shock protein HSP27 to the complex. Silencing PIPKIg or HSP27 destabilizes NRF2, reduces expression of its target gene HO-1, and sensitizes cells to oxidative stress. These data demonstrate an unexpected role of phosphoinositides and HSP27 in regulating NRF2 and point to PIPKIg and HSP27 as drug targets to destabilize NRF2 in cancer. In brief Phosphoinositides are coupled to NRF2 by PIPKIγ, and HSP27 is recruited and stabilizes NRF2, promoting stress-resistance.
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Radoiu C, Govindarajan B, Wang M, Sbrissa D, Cher ML, Chinni SR. A Novel Interaction between Chemokine and Phosphoinositide Signaling in Metastatic Prostate Cancer. MEDICAL RESEARCH ARCHIVES 2023; 11:10.18103/mra.v11i7.1.4020. [PMID: 38239314 PMCID: PMC10795749 DOI: 10.18103/mra.v11i7.1.4020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
Prostate cancer commonly metastasizes to bone due to its favorable microenvironment for cell growth and survival. Currently, the standard of care for metastatic prostate cancer is medical castration in conjunction with chemotherapeutic agents and newer anti-androgen/androgen receptor therapies. While these therapies aim to improve the quality of life in patients with advanced disease, resistance to these therapies is inevitable prompting the development of newer therapies to contain disease progression. The CXCL12/CXCR4 axis has previously been shown to be involved in prostate cancer cell homing to bone tissue, and new investigations found a novel interaction of Phosphatidyl Inositol 4 kinase IIIa (PI4KA) downstream of chemokine signaling. PI4KA phosphorylates at the 4th position on phosphatidylinositol (PI), to produce PI4P and is localized to the plasma membrane (PM). At the PM, PI4KA provides precursors for the generation of PI(4,5)P2, and PI(3,4,5)P3 and helps maintain PM identity through the recruitment of lipids and signaling proteins. PI4KA is recruited to the PM through evolutionarily conserved adaptor proteins, and in PC cells, CXCR4 binds with adaptor proteins to recruit PI4KA to the PM. The objective of this review is to summarize our understanding of the role that phosphatidyl inositol lipid messengers in cancer cells.
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Affiliation(s)
- Codrut Radoiu
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Barani Govindarajan
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Michael Wang
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Diego Sbrissa
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Michael L. Cher
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Pathology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Sreenivasa R. Chinni
- Department of Urology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Pathology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Oncology, Wayne State University School of Medicine, Detroit, MI 48201, USA
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Llorente A, Arora GK, Grenier SF, Emerling BM. PIP kinases: A versatile family that demands further therapeutic attention. Adv Biol Regul 2023; 87:100939. [PMID: 36517396 PMCID: PMC9992244 DOI: 10.1016/j.jbior.2022.100939] [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: 11/21/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
Phosphoinositides are membrane-localized phospholipids that regulate a plethora of essential cellular processes. These lipid signaling molecules are critical for cell homeostasis and therefore their levels are strictly regulated by the coordinated action of several families of lipid kinases and phosphatases. In this review, we provide a focused perspective on the phosphatidylinositol phosphate kinase (PIPK) family and the three subfamilies that compose it: Type I PIPKs or phosphatidylinositol-4-phosphate 5-kinases (PI4P5Ks), Type II PIPKs or phosphatidylinositol-5-phosphate 4-kinases (PI5P4Ks), and Type III PIPKs or phosphatidylinositol-3-phosphate 5-kinases (PIKfyve). Each subfamily is responsible for catalyzing a hydroxyl phosphorylation on specific phosphoinositide species to generate a double phosphorylated lipid, therefore regulating the levels of both substrate and product. Here, we summarize our current knowledge about the functions and regulation of each PIPK subfamily. Further, we highlight the roles of these kinases in various in vivo genetic models and give an overview of their involvement in multiple pathological conditions. The phosphoinositide field has been long focused on targeting PI3K signaling, but growing evidence suggests that it is time to draw attention to the other phosphoinositide kinases. The discovery of the involvement of PIPKs in the pathogenesis of multiple diseases has prompted substantial efforts to turn these enzymes into pharmacological targets. An increasingly refined knowledge of the biology of PIPKs in a variety of in vitro and in vivo models will facilitate the development of effective approaches for therapeutic intervention with the potential to translate into meaningful clinical benefits for patients suffering from cancer, immunological and infectious diseases, and neurodegenerative disorders.
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Affiliation(s)
- Alicia Llorente
- Cell and Molecular Biology of Cancer Program, Sanford Burnham Prebys, La Jolla, CA, 92037, USA
| | - Gurpreet K Arora
- Cell and Molecular Biology of Cancer Program, Sanford Burnham Prebys, La Jolla, CA, 92037, USA
| | - Shea F Grenier
- Cell and Molecular Biology of Cancer Program, Sanford Burnham Prebys, La Jolla, CA, 92037, USA
| | - Brooke M Emerling
- Cell and Molecular Biology of Cancer Program, Sanford Burnham Prebys, La Jolla, CA, 92037, USA.
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Bindra GK, Williams SA, Lay FT, Baxter AA, Poon IKH, Hulett MD, Phan TK. Human β-Defensin 2 (HBD-2) Displays Oncolytic Activity but Does Not Affect Tumour Cell Migration. Biomolecules 2022; 12:biom12020264. [PMID: 35204765 PMCID: PMC8961614 DOI: 10.3390/biom12020264] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/27/2022] [Accepted: 02/03/2022] [Indexed: 01/01/2023] Open
Abstract
Defensins form an integral part of the cationic host defence peptide (HDP) family, a key component of innate immunity. Apart from their antimicrobial and immunomodulatory activities, many HDPs exert multifaceted effects on tumour cells, notably direct oncolysis and/or inhibition of tumour cell migration. Therefore, HDPs have been explored as promising anticancer therapeutics. Human β-defensin 2 (HBD-2) represents a prominent member of human HDPs, being well-characterised for its potent pathogen-killing, wound-healing, cytokine-inducing and leukocyte-chemoattracting functions. However, its anticancer effects remain largely unknown. Recently, we demonstrated that HBD-2 binds strongly to phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2), a key mediator of defensin-induced cell death and an instructional messenger during cell migration. Hence, in this study, we sought to investigate the lytic and anti-migratory effects of HBD-2 on tumour cells. Using various cell biological assays and confocal microscopy, we showed that HBD-2 killed tumour cells via acute lytic cell death rather than apoptosis. In addition, our data suggested that, despite the reported PI(4,5)P2 interaction, HBD-2 does not affect cytoskeletal-dependent tumour cell migration. Together, our findings provide further insights into defensin biology and informs future defensin-based drug development.
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Rangarajan ES, Primi MC, Colgan LA, Chinthalapudi K, Yasuda R, Izard T. A distinct talin2 structure directs isoform specificity in cell adhesion. J Biol Chem 2020; 295:12885-12899. [PMID: 32605925 DOI: 10.1074/jbc.ra119.010789] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 06/23/2020] [Indexed: 01/25/2023] Open
Abstract
Integrin receptors regulate normal cellular processes such as signaling, cell migration, adhesion to the extracellular matrix, and leukocyte function. Talin recruitment to the membrane is necessary for its binding to and activation of integrin. Vertebrates have two highly conserved talin homologs that differ in their expression patterns. The F1-F3 FERM subdomains of cytoskeletal proteins resemble a cloverleaf, but in talin1, its F1 subdomain and additional F0 subdomain align more linearly with its F2 and F3 subdomains. Here, we present the talin2 crystal structure, revealing that its F0-F1 di-subdomain displays another unprecedented constellation, whereby the F0-F1-F2 adopts a new cloverleaf-like arrangement. Using multiangle light scattering (MALS), fluorescence lifetime imaging (FLIM), and FRET analyses, we found that substituting the corresponding residues in talin2 that abolish lipid binding in talin1 disrupt the binding of talin to the membrane, focal adhesion formation, and cell spreading. Our results provide the molecular details of the functions of specific talin isoforms in cell adhesion.
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Affiliation(s)
- Erumbi S Rangarajan
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, Florida, USA
| | - Marina C Primi
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, Florida, USA
| | - Lesley A Colgan
- Neuronal Signal Transduction, Max Planck Florida Institute for Neuroscience, Jupiter, Florida, USA
| | - Krishna Chinthalapudi
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, Florida, USA
| | - Ryohei Yasuda
- Neuronal Signal Transduction, Max Planck Florida Institute for Neuroscience, Jupiter, Florida, USA
| | - Tina Izard
- Cell Adhesion Laboratory, Department of Integrative Structural and Computational Biology, The Scripps Research Institute, Jupiter, Florida, USA.
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Interplay between integrins and PI4P5K Sktl is crucial for cell polarization and reepithelialisation during Drosophila wound healing. Sci Rep 2019; 9:16331. [PMID: 31704968 PMCID: PMC6842001 DOI: 10.1038/s41598-019-52743-z] [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: 04/24/2019] [Accepted: 10/22/2019] [Indexed: 11/08/2022] Open
Abstract
Phosphatidylinositol(4,5)-bisphosphate [PI(4,5)P2] regulates cell adhesion and actin dynamics during cell migration. PI(4,5)P2 binds various components of the cell adhesion machinery, but how these processes affect migration of the epithelial cell sheet is not well understood. Here, we report that PI(4,5)P2 and Sktl, the kinase that converts PI4P to PI(4,5)P2, are both localized to the rear side of cells during wound healing of the Drosophila larval epidermis. The Sktl localization requires JNK pathway activation and integrins, but not PVR. The sktl knockdown epidermis displays strong defects in would closure, reminiscent of the JNK-depleted epidermis, and shows severe disruption of cell polarity, as determined by myosin II localization. Sktl and βPS integrin colocalize at the rear side of cells forming the trailing edge during wound healing and the two are inter-dependent in that the absence of one severely disrupts the rear localization of the other. These results strongly suggest that the JNK pathway regulates the rear localization of Sktl and integrins and the interplay between Sktl and integrins sets up cell polarity, which is crucial for reepithelialisation during wound healing.
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PIPKI γ Regulates CCL2 Expression in Colorectal Cancer by Activating AKT-STAT3 Signaling. J Immunol Res 2019; 2019:3690561. [PMID: 31781676 PMCID: PMC6874988 DOI: 10.1155/2019/3690561] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/30/2019] [Accepted: 08/07/2019] [Indexed: 12/19/2022] Open
Abstract
Colorectal cancer (CRC) remains the third most commonly diagnosed cancer, ranking second among the most common causes of cancer-related mortality. Immune checkpoint therapy has recently been shown to have great potential. However, only some patients respond to immune checkpoint blockade, indicating the unmet need for determining the underlying mechanism of colorectal cancer immunosuppression. In this study, we analyzed The Cancer Genome Atlas (TCGA) datasets and found that high expression of PIPKIγ positively correlated with tumor-associated macrophage infiltration. Further loss-of-function studies revealed that silencing PIPKIγ greatly reduced CCL2 expression at both the mRNA and protein levels, leading to weak chemotaxis of cancer cells to macrophages. Mechanistically, PIPKIγ facilitated PI3K-Akt-mTOR signaling pathway activation to increase STAT3 phosphorylation levels, thus triggering CCL2 transcription to enhance tumor-associated macrophage recruitment. These findings identify the PIPKIγ signaling pathway as a new actor in colorectal cancer immunosuppression and a potential therapeutic target for this common cancer.
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Phan TK, Bindra GK, Williams SA, Poon IK, Hulett MD. Combating Human Pathogens and Cancer by Targeting Phosphoinositides and Their Metabolism. Trends Pharmacol Sci 2019; 40:866-882. [DOI: 10.1016/j.tips.2019.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 09/11/2019] [Accepted: 09/13/2019] [Indexed: 12/19/2022]
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Ni W, Li Y, Cai L, Dong C, Fang H, Chen Y, Li H, Yao M, Xiao N. SUMOylation is required for PIPK1γ-driven keratinocyte migration and growth. FEBS J 2019; 286:4709-4720. [PMID: 31276292 DOI: 10.1111/febs.14978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/11/2019] [Accepted: 07/02/2019] [Indexed: 12/13/2022]
Abstract
PIPKIγ, a key member of the type I phosphatidylinositol 4-phosphate kinase (PIPKI) family that regulates the spatial-temporal generation of PIP2, has been implicated in diverse biological processes including cell survival, cell polarity, and cell migration. An essential role of PIPKIγ in tumor cells and nerve cells has been established in previous studies. However, the function and regulatory mechanism of PIPKIγ remains incompletely understood. Here, we showed that PIPKIγ can specifically associate with the SUMO-conjugating (E2) enzyme UBC9 and can be SUMOylated both in vivo and in vitro. We further identified that Lys-591 is the critical SUMO-acceptor site of PIPKIγ and that SUMO conjugation at this site is required for PIPKIγ-driven keratinocyte migration and growth. Mechanistically, SUMOylation deficiency significantly disrupts PIPKIγ-mediated generation of intracellular PIP2, rather than the subcellular translocation and protein stability of PIPKIγ. Our findings reveal that PIPKIγ is a novel SUMOylation target and highlight the essential role of PIPKIγ SUMOylation in human keratinocyte function, providing an important orientation for in-depth study of wound repair.
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Affiliation(s)
- Wei Ni
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, China.,Department of Burns and Plastic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, China.,Bengbu Medical College, Anhui, China
| | - Ying Li
- Department of Emergency, Qingdao Municipal Hospital, Shandong, China
| | - Lili Cai
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, China
| | - Changsheng Dong
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, China
| | - Houshun Fang
- Key Laboratory of Pediatric Hematology and Oncology, Ministry of Health and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, China
| | - Yao Chen
- Key Laboratory of Pediatric Hematology and Oncology, Ministry of Health and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, China
| | - Hui Li
- Key Laboratory of Pediatric Hematology and Oncology, Ministry of Health and Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, China
| | - Min Yao
- Department of Burns and Plastic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, China
| | - Ning Xiao
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, China
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12
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Peng W, Huang W, Ge X, Xue L, Zhao W, Xue J. Type Iγ phosphatidylinositol phosphate kinase promotes tumor growth by facilitating Warburg effect in colorectal cancer. EBioMedicine 2019; 44:375-386. [PMID: 31105034 PMCID: PMC6604371 DOI: 10.1016/j.ebiom.2019.05.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/07/2019] [Accepted: 05/07/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Emerging evidence suggests that metabolic alterations are a hallmark of cancer cells and contribute to tumor initiation and development. Cancer cells primarily utilize aerobic glycolysis (the Warburg effect) to produce energy and support anabolic growth. The type Iγ phosphatidylinositol phosphate kinase (PIPKIγ) is profoundly implicated in tumorigenesis, however, little is known about its role in reprogrammed energy metabolism. METHODS Loss- and gain-of-function studies were applied to determine the oncogenic roles of PIPKIγ in colorectal cancer. Transcriptome analysis, real-time qPCR, immunohistochemical staining, Western blotting, and metabolic analysis were carried out to uncover the cellular mechanism of PIPKIγ. FINDINGS In this study, we showed that PIPKIγ was frequently upregulated in colorectal cancer and predicted a poor prognosis. Genetic silencing of pan-PIPKIγ suppressed cell proliferation and aerobic glycolysis of colorectal cancer. In contrast, the opposite effects were observed by overexpression of PIPKIγ_i2. Importantly, PIPKIγ-induced prolific effect was largely glycolysis-dependent. Mechanistically, PIPKIγ facilitated activation of PI3K/Akt/mTOR signaling pathways to upregulate c-Myc and HIF1α levels, which regulate expression of glycolytic enzymes to enhance glycolysis. Moreover, pharmacological inhibition by PIPKIγ activity with the specific inhibitor UNC3230 significantly inhibited colorectal cancer glycolysis and tumor growth. INTERPRETATION Our findings reveal a new regulatory role of PIPKIγ in Warburg effect and provide a key contributor in colorectal cancer metabolism with potential therapeutic potentials. FUND: National Key Research and Development Program of China, Outstanding Clinical Discipline Project of Shanghai Pudong, Natural Science Foundation of China, and Science and Technology Commission of Shanghai Municipality.
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Affiliation(s)
- Wei Peng
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Wei Huang
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Xiaoxiao Ge
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Liqiong Xue
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Wei Zhao
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Junli Xue
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China.
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Li S, Chen C, Xiong X, Huang Y, Hu J, Fan Z, Ling K. Type Iγ phosphatidylinositol phosphate kinase dependent cell migration and invasion are dispensable for tumor metastasis. Am J Cancer Res 2019; 9:959-974. [PMID: 31218104 PMCID: PMC6556613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/01/2019] [Indexed: 06/09/2023] Open
Abstract
Type Iγ phosphatidylinositol phosphate kinase (PIPKIγ) has been associated with poor prognosis in breast cancer patients by promoting metastasis. Among the six alternative-splicing isoforms of PIPKIγ, PIPKIγ_i2 specifically targets to focal adhesions and regulates focal adhesion turnover, thus was proposed responsible for tumor metastasis. In the present study, we specifically depleted PIPKIγ_i2 from mouse triple negative breast cancer (TNBC) 4T1 cells and analyzed their behaviors. As expected, PIPKIγ_i2-depleted 4T1 cells exhibited reduced proliferation, migration, and invasion in vitro at a comparable level as pan-PIPKIγ depleted cells. However, PIPKIγ_i2 depletion had no effect on metastasis and progression of 4T1 tumors in vivo. PIPKIγ_i2-depleted tumors showed similar levels of growth, hypoxia state, macrophage infiltration, and angiogenesis as parental tumors, although the pan-PIPKIγ depletion led to substantial inhibition on these aspects. Further investigation revealed that depleting PIPKIγ_i2 alone, unlike depleting all PIPKIγ isoforms, had no effect on PD-L1 expression, the status of the epithelial-to-mesenchymal transition, and the anchorage-independent growth of 4T1 cells. In human TNBC MDA-MB-231 cells, we obtained similar results. Thus, while PIPKIγ_i2 indeed is required for cell migration and invasion, these characteristics are not decisive for metastasis. Other PIPKIγ isoform(s) that regulate the expression of key factors to support cell survival under stresses is more critical for the malignant progression of TNBCs.
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Affiliation(s)
- Shiheng Li
- Department of Breast Surgery, The First Hospital of Jilin University71 Xinmin Street, Changchun, Jilin Province, China
- Department of Biochemistry and Molecular Biology, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
| | - Chunhua Chen
- Department of Biochemistry and Molecular Biology, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
| | - Xunhao Xiong
- Department of Pathology, The University of Oklahoma Health Sciences Center940 Stanton L Young Blvd, Oklahoma City, Oklahoma, USA
| | - Yan Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
- Department of Nephrology and Hypertension, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
| | - Jinghua Hu
- Department of Biochemistry and Molecular Biology, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
- Department of Nephrology and Hypertension, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
| | - Zhimin Fan
- Department of Breast Surgery, The First Hospital of Jilin University71 Xinmin Street, Changchun, Jilin Province, China
| | - Kun Ling
- Department of Biochemistry and Molecular Biology, Mayo Clinic200 First Street SW, Rochester, MN 55902, USA
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14
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Wang J, Zuo J, Wang M, Ma X, Gao K, Bai X, Wang N, Xie W, Liu H. Polo‑like kinase 4 promotes tumorigenesis and induces resistance to radiotherapy in glioblastoma. Oncol Rep 2019; 41:2159-2167. [PMID: 30816483 PMCID: PMC6412581 DOI: 10.3892/or.2019.7012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 02/07/2019] [Indexed: 12/16/2022] Open
Abstract
Glioblastoma (GBM) is one of the most malignant tumors in adults, associated with severe outcomes (median survival, <2 years). Multiple mechanisms are known to be involved in tumor recurrence and treatment resistance in GBM, however, the key regulator for GBM tumorigenesis and therapy resistance remains unclear. To clarify a novel potential functional mechanism of GBM recurrence, a wide range of experiments including in vitro molecular biological experiments and in vivo intracranial xenograft tumor models were performed in the present study. With bioinformatics analysis, polo-like kinase 4 (PLK4) was initially identified as one of the most upregulated kinase encoding genes in GBM, which was functionally required for both in vitro cell proliferation and in vivo tumorigenesis in GBM. Clinically, an elevated PLK4 expression was observed in high grade glioma patients, which was associated with poor prognosis. In addition, PLK4 enhanced radioresistance in GBM, while PLK4 knockdown via lentivirus transfection significantly increased the radiosensitivity of GBM cells. Mechanically, PLK4 expression was markedly elevated by the exogenous overexpression of ATPase family AAA domain-containing protein 2 (ATAD2) in GBM cells. Collectively, the results suggested that the ATAD2-dependent transcriptional regulation of PLK4 promoted cell proliferation and tumorigenesis, as well as radioresistance in GBM, thus potentially inducing tumor recurrence. PLK4 could therefore serve as a potential therapeutic target for GBM treatment.
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Affiliation(s)
- Jia Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Jie Zuo
- The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Maode Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xudong Ma
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ke Gao
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiaobin Bai
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Ning Wang
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Wanfu Xie
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Hao Liu
- Department of Neurosurgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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15
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Kosmidis C, Varsamis N, Anthimidis G, Baka S, Valoukas D, Koletsa T, Zarampouka K, Koimtzis G, Georgakoudi E, Zarogoulidis P, Efthymiadis C. Primary hepatocellular carcinoma in a patient with history of treated breast cancer: a case report with challenging diagnosis and treatment. Int J Gen Med 2018; 11:399-403. [PMID: 30349348 PMCID: PMC6188071 DOI: 10.2147/ijgm.s176052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction Breast cancer is the most common malignancy in women worldwide. Long-term survivors among patients treated for breast cancer are at a high risk for developing a second primary malignancy. Hepatocellular carcinoma is the most frequent primary hepatic malignancy and should be ruled out in breast cancer patients who are diagnosed with solitary hepatic lesions. False diagnosis may lead to inappropriate oncologic staging and treatment of the disease. Case presentation We present the case of a 73-year-old female patient who had been treated for invasive ductal breast cancer 7 years ago and was diagnosed with a solid hepatic lesion at segments VI and VII and a small, calcified lesion at the tail of the pancreas on follow-up with an abdominal computed tomography. Oncology council decided that both lesions could be resected after determining whether they were metastatic or second primary malignancies. The patient underwent laparotomy and rapid biopsy which showed primary hepatocellular carcinoma and fibrosis of the pancreas. We performed hepatic segmentectomy (VI–VII) and cholecystectomy, while the pancreatic lesion was left intact. The postoperative course of the patient was uncomplicated and she remains disease free 2 years after the operation without any adjuvant therapy. Conclusion All hepatic lesions detected in breast cancer patients should be evaluated with open mind and liver biopsy should be performed to get a definitive diagnosis and implement the proper treatment strategy.
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Affiliation(s)
| | - Nikolaos Varsamis
- Department of Surgery, Interbalkan European Medical Center, Thessaloniki, Greece
| | - Georgios Anthimidis
- Department of Surgery, Interbalkan European Medical Center, Thessaloniki, Greece
| | - Sofia Baka
- Department of Oncology, Interbalkan European Medical Center, Thessaloniki, Greece
| | - Dimitrios Valoukas
- Department of Oncology, General Hospital of Ptolemaida, Ptolemaida, Greece
| | - Triantafyllia Koletsa
- Pathology Department, Faculty of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Katerina Zarampouka
- Pathology Department, Faculty of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Koimtzis
- Third Surgical Department, Faculty of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Paul Zarogoulidis
- Pulmonary-Oncology Unit, "Theageneio" Cancer Hospital, Thessaloniki, Greece,
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16
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Li L, Kołodziej T, Jafari N, Chen J, Zhu H, Rajfur Z, Huang C. Cdk5-mediated phosphorylation regulates phosphatidylinositol 4-phosphate 5-kinase type I γ 90 activity and cell invasion. FASEB J 2018; 33:631-642. [PMID: 30040488 DOI: 10.1096/fj.201800296r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Phosphatidylinositol 4-phosphate 5-kinase type I γ (PIPKIγ90) regulates cell migration, invasion, and metastasis. However, it is unknown how cellular signals regulate those processes. Here, we show that cyclin-dependent kinase 5 (Cdk5), a protein kinase that regulates cell migration and invasion, phosphorylates PIPKIγ90 at S453, and that Cdk5-mediated PIPKIγ90 phosphorylation is essential for cell invasion. Moreover, Cdk5-mediated phosphorylation down-regulates the activity of PIPKIγ90 and the secretion of fibronectin, an extracellular matrix protein that regulates cell migration and invasion. Furthermore, inhibition of PIPKIγ activity with the chemical inhibitor UNC3230 suppresses fibronectin secretion in a dose-dependent manner, whereas depletion of Cdk5 enhances fibronectin secretion. With total internal reflection fluorescence microscopy, we found that secreted fibronectin appears as round dots, which colocalize with Tks5 and CD9 but not with Zyxin. These data suggest that Cdk5-mediated PIPKIγ90 phosphorylation regulates cell invasion by controlling PIPKIγ90 activity and fibronectin secretion.-Li, L., Kołodziej, T., Jafari, N., Chen, J., Zhu, H., Rajfur, Z., Huang, C. Cdk5-mediated phosphorylation regulates phosphatidylinositol 4-phosphate 5-kinase type I γ 90 activity and cell invasion.
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Affiliation(s)
- Liqing Li
- Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - Tomasz Kołodziej
- Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA.,Faculty of Physics, Astronomy, and Applied Computer Science, Institute of Physics, Jagiellonian University, Krakow, Poland
| | - Naser Jafari
- Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA
| | - Jing Chen
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, USA; and
| | - Haining Zhu
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, USA; and
| | - Zenon Rajfur
- Faculty of Physics, Astronomy, and Applied Computer Science, Institute of Physics, Jagiellonian University, Krakow, Poland
| | - Cai Huang
- Markey Cancer Center, University of Kentucky, Lexington, Kentucky, USA.,Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
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17
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Tran MH, Seo E, Min S, Nguyen QAT, Choi J, Lee UJ, Hong SS, Kang H, Mansukhani A, Jou I, Lee SY. NEDD4-induced degradative ubiquitination of phosphatidylinositol 4-phosphate 5-kinase α and its implication in breast cancer cell proliferation. J Cell Mol Med 2018; 22:4117-4129. [PMID: 29851245 PMCID: PMC6111810 DOI: 10.1111/jcmm.13689] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/21/2018] [Indexed: 12/15/2022] Open
Abstract
Phosphatidylinositol 4‐phosphate 5‐kinase (PIP5K) family members generate phosphatidylinositol 4,5‐bisphosphate (PIP2), a critical lipid regulator of diverse physiological processes. The PIP5K‐dependent PIP2 generation can also act upstream of the oncogenic phosphatidylinositol 3‐kinase (PI3K)/Akt pathway. Many studies have demonstrated various mechanisms of spatiotemporal regulation of PIP5K catalytic activity. However, there are few studies on regulation of PIP5K protein stability. Here, we examined potential regulation of PIP5Kα, a PIP5K isoform, via ubiquitin‐proteasome system, and its implication for breast cancer. Our results showed that the ubiquitin ligase NEDD4 (neural precursor cell expressed, developmentally down‐regulated gene 4) mediated ubiquitination and proteasomal degradation of PIP5Kα, consequently reducing plasma membrane PIP2 level. NEDD4 interacted with the C‐terminal region and ubiquitinated the N‐terminal lysine 88 in PIP5Kα. In addition, PIP5Kα gene disruption inhibited epidermal growth factor (EGF)‐induced Akt activation and caused significant proliferation defect in breast cancer cells. Notably, PIP5Kα K88R mutant that was resistant to NEDD4‐mediated ubiquitination and degradation showed more potentiating effects on Akt activation by EGF and cell proliferation than wild‐type PIP5Kα. Collectively, these results suggest that PIP5Kα is a novel degradative substrate of NEDD4 and that the PIP5Kα‐dependent PIP2 pool contributing to breast cancer cell proliferation through PI3K/Akt activation is negatively controlled by NEDD4.
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Affiliation(s)
- Mai Hoang Tran
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Eunjeong Seo
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Soohong Min
- School of Biological Sciences, Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Korea
| | - Quynh-Anh T Nguyen
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Juyong Choi
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Uk-Jin Lee
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Soon-Sun Hong
- Department of Biomedical Sciences, Inha University College of Medicine, Incheon, Korea
| | - Hyuk Kang
- Department of Chemistry, Ajou University, Suwon, Korea
| | - Alka Mansukhani
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
| | - Ilo Jou
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
| | - Sang Yoon Lee
- Department of Biomedical Sciences, Chronic Inflammatory Disease Research Center, Ajou University School of Medicine, Suwon, Korea
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18
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Type Iγ phosphatidylinositol phosphate kinase regulates PD-L1 expression by activating NF-κB. Oncotarget 2018; 8:42414-42427. [PMID: 28465490 PMCID: PMC5522076 DOI: 10.18632/oncotarget.17123] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/01/2017] [Indexed: 12/18/2022] Open
Abstract
The programmed death-ligand 1 (PD-L1), by binding to PD-1 on the surface of immune cells, activates a major immune checkpoint pathway. Elevated expression of PD-L1 in tumor cells mediates tumor-induced T-cell exhaustion and immune suppression; therefore protect the survival of tumor cells. Although blockade of the PD-1/PD-L1 axis exhibits great potential in cancer treatment, mechanisms driving the up-regulation of PD-L1 in tumor cells remain not fully understood. Here we found that type Iγ phosphatidylinositol 4-phosphate (PtdIns(4)P) 5-kinase (PIPKIγ) is required for PD-L1 expression in triple negative breast cancer cells. Depletion of PIPKIγ inhibits both intrinsic and induced PD-L1 expression. Results from further analyses suggest that PIPKIγ promotes the transcription of the PD-L1 gene by activating the NF-κB pathway in these cells. These results demonstrate that PIPKIγ-dependent expression of PD-L1 is likely important for the progression of triple negative breast cancer.
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19
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Qi L, Jafari N, Li X, Chen Z, Li L, Hytönen VP, Goult BT, Zhan CG, Huang C. Talin2-mediated traction force drives matrix degradation and cell invasion. J Cell Sci 2017; 129:3661-3674. [PMID: 27694340 DOI: 10.1242/jcs.185959] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 08/18/2016] [Indexed: 12/19/2022] Open
Abstract
Talin binds to β-integrin tails to activate integrins, regulating cell migration, invasion and metastasis. There are two talin genes, TLN1 and TLN2, encoding talin1 and talin2, respectively. Talin1 regulates focal adhesion dynamics, cell migration and invasion, whereas the biological function of talin2 is not clear and, indeed, talin2 has been presumed to function redundantly with talin1. Here, we show that talin2 has a much stronger binding to β-integrin tails than talin1. Replacement of talin2 Ser339 with Cys significantly decreased its binding to β1-integrin tails to a level comparable to that of talin1. Talin2 localizes at invadopodia and is indispensable for the generation of traction force and invadopodium-mediated matrix degradation. Ablation of talin2 suppressed traction force generation and invadopodia formation, which were restored by re-expressing talin2 but not talin1. Furthermore, re-expression of wild-type talin2 (but not talin2S339C) in talin2-depleted cells rescued development of traction force and invadopodia. These results suggest that a strong interaction of talin2 with integrins is required to generate traction, which in turn drives invadopodium-mediated matrix degradation, which is key to cancer cell invasion.
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Affiliation(s)
- Lei Qi
- Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA Veterans Affairs Medical Center, Lexington, KY 40502, USA
| | - Naser Jafari
- Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA Veterans Affairs Medical Center, Lexington, KY 40502, USA
| | - Xiang Li
- Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA
| | - Zaozao Chen
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Liqing Li
- Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA
| | - Vesa P Hytönen
- BioMediTech, University of Tampere, 33520 Tampere, Finland and Fimlab Laboratories, Tampere 33520, Finland
| | - Benjamin T Goult
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
| | - Chang-Guo Zhan
- Molecular Modeling and Biopharmaceutical Center, College of Pharmacy, University of Kentucky, Lexington, KY 40506, USA
| | - Cai Huang
- Markey Cancer Center, University of Kentucky, Lexington, KY 40506, USA Veterans Affairs Medical Center, Lexington, KY 40502, USA Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, KY 40506, USA
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20
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Chen C, Wang X, Fang J, Xue J, Xiong X, Huang Y, Hu J, Ling K. EGFR-induced phosphorylation of type Iγ phosphatidylinositol phosphate kinase promotes pancreatic cancer progression. Oncotarget 2017; 8:42621-42637. [PMID: 28388589 PMCID: PMC5522093 DOI: 10.18632/oncotarget.16730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 01/24/2017] [Indexed: 01/05/2023] Open
Abstract
Pancreatic cancer is one of the deadliest malignancies and effective treatment has always been lacking. In current study, we investigated how the type Iγ phosphatidylinositol phosphate kinase (PIPKIγ) participates in the progression of pancreatic ductal adenocarcinoma (PDAC) for novel therapeutic potentials against this lethal disease. We found that PIPKIγ is up-regulated in all tested PDAC cell lines. The growth factor (including EGFR)-induced tyrosine phosphorylation of PIPKIγ is significantly elevated in in situ and metastatic PDAC tissues. Loss of PIPKIγ inhibits the aggressiveness of PDAC cells by restraining the activities of AKT and STAT3, as well as MT1-MMP expression. Therefore when planted into the pancreas of nude mice, PIPKIγ-depleted PDAC cells exhibits substantially repressed tumor growth and metastasis comparing to control PDAC cells. Results from further studies showed that the phosphorylation-deficient PIPKIγ mutant, unlike its wild-type counterpart, cannot rescue PDAC progression inhibited by PIPKIγ depletion. These findings indicate that PIPKIγ, functioning downstream of EGFR signaling, is critical to the progression of PDAC, and suggest that PIPKIγ is potentially a valuable therapeutic target for PDAC treatment.
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Affiliation(s)
- Chunhua Chen
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
- These authors have contributed equally to this work
| | - Xiangling Wang
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
- These authors have contributed equally to this work
| | - Juemin Fang
- Shanghai Tenth People’s Hospital, Tongji University, Shanghai, China
- These authors have contributed equally to this work
| | - Junli Xue
- Shanghai East Hospital, Tongji University, Shanghai, China
| | - Xunhao Xiong
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Yan Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Jinghua Hu
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
| | - Kun Ling
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota, USA
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21
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Smurf1 regulates lung cancer cell growth and migration through interaction with and ubiquitination of PIPKIγ. Oncogene 2017; 36:5668-5680. [DOI: 10.1038/onc.2017.166] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 03/31/2017] [Accepted: 04/26/2017] [Indexed: 12/12/2022]
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22
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Cao S, Chen C, Xue J, Huang Y, Yang X, Ling K. Silencing of type Iγ phosphatidylinositol phosphate kinase suppresses ovarian cancer cell proliferation, migration and invasion. Oncol Rep 2017; 38:253-262. [PMID: 28560454 PMCID: PMC5492676 DOI: 10.3892/or.2017.5670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 05/05/2017] [Indexed: 12/18/2022] Open
Abstract
Metastasis is the major cause of death in ovarian cancer patients. Given that the molecular mechanism underlying metastasis formation is critical for improving therapeutic development and clinical treatment, it must be fully understood. Recent studies have revealed that lipid kinase type Iγ phosphatidylinositol phosphate kinase (PIPKIγ) participates in the metastasis of breast cancer and colon cancer by regulating cell migration and invasion. However, its role in the progression of ovarian cancer is unclear. Here we showed that PIPKIγ expression is upregulated in multiple epithelial ovarian cancer cell lines. Silencing of PIPKIγ impaired PI3K/AKT signaling and inhibited the aggressive behaviors of epithelial ovarian cancer cells, including proliferation, migration and invasion. Moreover, we found that PIPKIγ was required for the activation of signal transducer and activator of transcription 3 (STAT3) in epithelial ovarian cancer cells, indicating that STAT3 may also be engaged in the PIPKIγ-dependent aggressiveness of epithelial ovarian cancer cells. Our results, for the first time, identified PIPKIγ as a novel regulator in epithelial ovarian cancer cells that promotes cell proliferation, migration and invasion by activating multiple signaling pathways. Therefore, we propose that PIPKIγ could potentially be a therapeutic target for the early detection and treatment of epithelial ovarian cancer. Further studies employing in vivo models are necessary to test this possibility.
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Affiliation(s)
- Siyu Cao
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of the Medical School, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Chunhua Chen
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55901, USA
| | - Junli Xue
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, P.R. China
| | - Yan Huang
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55901, USA
| | - Xiaofeng Yang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of the Medical School, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Kun Ling
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55901, USA
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23
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Jafari N, Zheng Q, Li L, Li W, Qi L, Xiao J, Gao T, Huang C. p70S6K1 (S6K1)-mediated Phosphorylation Regulates Phosphatidylinositol 4-Phosphate 5-Kinase Type I γ Degradation and Cell Invasion. J Biol Chem 2016; 291:25729-25741. [PMID: 27780861 DOI: 10.1074/jbc.m116.742742] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 10/22/2016] [Indexed: 11/06/2022] Open
Abstract
Phosphatidylinositol 4-phosphate 5-kinase type I γ (PIPKIγ90) ubiquitination and subsequent degradation regulate focal adhesion assembly, cell migration, and invasion. However, it is unknown how upstream signals control PIPKIγ90 ubiquitination or degradation. Here we show that p70S6K1 (S6K1), a downstream target of mechanistic target of rapamycin (mTOR), phosphorylates PIPKIγ90 at Thr-553 and Ser-555 and that S6K1-mediated PIPKIγ90 phosphorylation is essential for cell migration and invasion. Moreover, PIPKIγ90 phosphorylation is required for the development of focal adhesions and invadopodia, key machineries for cell migration and invasion. Surprisingly, substitution of Thr-553 and Ser-555 with Ala promoted PIPKIγ90 ubiquitination but enhanced the stability of PIPKIγ90, and depletion of S6K1 also enhanced the stability of PIPKIγ90, indicating that PIPKIγ90 ubiquitination alone is insufficient for its degradation. These data suggest that S6K1-mediated PIPKIγ90 phosphorylation regulates cell migration and invasion by controlling PIPKIγ90 degradation.
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Affiliation(s)
- Naser Jafari
- From the Markey Cancer Center and.,the Veterans Affairs Medical Center, Lexington, Kentucky 40502
| | | | | | - Wei Li
- From the Markey Cancer Center and
| | - Lei Qi
- From the Markey Cancer Center and
| | | | | | - Cai Huang
- From the Markey Cancer Center and .,the Veterans Affairs Medical Center, Lexington, Kentucky 40502.,the Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40506 and
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24
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Sun M, Cai J, Anderson RA, Sun Y. Type I γ Phosphatidylinositol Phosphate 5-Kinase i5 Controls the Ubiquitination and Degradation of the Tumor Suppressor Mitogen-inducible Gene 6. J Biol Chem 2016; 291:21461-21473. [PMID: 27557663 DOI: 10.1074/jbc.m116.736041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/11/2016] [Indexed: 12/15/2022] Open
Abstract
Mitogen-inducible gene 6 (Mig6) is a tumor suppressor, and the disruption of Mig6 expression is associated with cancer development. Mig6 directly interacts with epidermal growth factor receptor (EGFR) to suppress the activation and downstream signaling of EGFR. Therefore, loss of Mig6 enhances EGFR-mediated signaling and promotes EGFR-dependent carcinogenesis. The molecular mechanism modulating Mig6 expression in cancer remains unclear. Here we demonstrate that type I γ phosphatidylinositol phosphate 5-kinase i5 (PIPKIγi5), an enzyme producing phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2), stabilizes Mig6 expression. Knockdown of PIPKIγi5 leads to the loss of Mig6 expression, which dramatically enhances and prolongs EGFR-mediated cell signaling. Loss of PIPKIγi5 significantly promotes Mig6 protein degradation via proteasomes, but it does not affect the Mig6 mRNA level. PIPKIγi5 directly interacts with the E3 ubiquitin ligase neuronal precursor cell-expressed developmentally down-regulated 4-1 (NEDD4-1). The C-terminal domain of PIPKIγi5 and the WW1 and WW2 domains of NEDD4-1 are required for their interaction. The C2 domain of NEDD4-1 is required for its interaction with PtdIns(4,5)P2 By binding with NEDD4-1 and producing PtdIns(4,5)P2, PIPKIγi5 perturbs NEDD4-1-mediated Mig6 ubiquitination and the subsequent proteasomal degradation. Thus, loss of NEDD4-1 can rescue Mig6 expression in PIPKIγi5 knockdown cells. In this way, PIPKIγi5, NEDD4-1, and Mig6 form a novel molecular nexus that controls EGFR activation and downstream signaling.
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Affiliation(s)
- Ming Sun
- From the Philips Institute for Oral Health Research, School of Dentistry and Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298 and
| | - Jinyang Cai
- From the Philips Institute for Oral Health Research, School of Dentistry and Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298 and
| | - Richard A Anderson
- the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Yue Sun
- From the Philips Institute for Oral Health Research, School of Dentistry and Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia 23298 and
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25
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Thapa N, Tan X, Choi S, Lambert PF, Rapraeger AC, Anderson RA. The Hidden Conundrum of Phosphoinositide Signaling in Cancer. Trends Cancer 2016; 2:378-390. [PMID: 27819060 DOI: 10.1016/j.trecan.2016.05.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Phosphoinositide 3-kinase (PI3K) generation of PI(3,4,5)P3 from PI(4,5)P2 and the subsequent activation of Akt and its downstream signaling cascades (e.g. mTORC1) dominates the landscape of phosphoinositide signaling axis in cancer research. However, PI(4,5)P2 is breaking its boundary as merely a substrate for PI3K and phospholipase C (PLC), and is now an established lipid messenger pivotal for different cellular events in cancer. Here, we review the phosphoinositide signaling axis in cancer, giving due weight to PI(4,5)P2 and its generating enzymes, the phosphatidylinositol phosphate (PIP) kinases (PIPKs). We highlighted how PI(4,5)P2 and PIP kinases serve as a proximal node in phosphoinositide signaling axis and how its interaction with cytoskeletal proteins regulates migratory and invasive nexus of metastasizing tumor cells.
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Affiliation(s)
- Narendra Thapa
- University of Wisconsin-Madison School of Medicine and Public Health, 1300 University Avenue, Madison, WI 53706, USA
| | - Xiaojun Tan
- Program in Molecular and Cellular Pharmacology, 1300 University Avenue, Madison, WI 53706, USA
| | - Suyong Choi
- University of Wisconsin-Madison School of Medicine and Public Health, 1300 University Avenue, Madison, WI 53706, USA
| | - Paul F Lambert
- Department of Oncology, 1300 University Avenue, Madison, WI 53706, USA; McArdle Laboratory for Cancer Research, 1300 University Avenue, Madison, WI 53706, USA; University of Wisconsin-Madison School of Medicine and Public Health, 1300 University Avenue, Madison, WI 53706, USA
| | - Alan C Rapraeger
- Program in Molecular and Cellular Pharmacology, 1300 University Avenue, Madison, WI 53706, USA; Department of Human Oncology, 1300 University Avenue, Madison, WI 53706, USA; University of Wisconsin-Madison School of Medicine and Public Health, 1300 University Avenue, Madison, WI 53706, USA
| | - Richard A Anderson
- Program in Molecular and Cellular Pharmacology, 1300 University Avenue, Madison, WI 53706, USA; University of Wisconsin-Madison School of Medicine and Public Health, 1300 University Avenue, Madison, WI 53706, USA
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Thapa N, Choi S, Tan X, Wise T, Anderson RA. Phosphatidylinositol Phosphate 5-Kinase Iγ and Phosphoinositide 3-Kinase/Akt Signaling Couple to Promote Oncogenic Growth. J Biol Chem 2015; 290:18843-54. [PMID: 26070568 DOI: 10.1074/jbc.m114.596742] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Indexed: 11/06/2022] Open
Abstract
The assembly of signaling complexes at the plasma membrane is required for the initiation and propagation of cellular signaling upon cell activation. The class I PI3K and the serine/threonine-specific protein kinase Akt signaling pathways (PI3K/Akt) are often activated in tumors. These pathways are initiated by the generation of phosphatidylinositol 3,4,5-triphosphate (PIP3) by PI3K-mediated phosphorylation of phosphatidylinositol 4,5-biphosphate (PIP2), synthesized by phosphatidylinositol 4-phosphate 5-kinase (PIPKI) enzymes. The mechanism of how tumor cells recruit and organize the PIP2-synthesizing enzymes with PI3K in the plasma membrane for activation of PI3K/Akt signaling is not defined. Here, we demonstrated a role for the phosphatidylinositol 4-phosphate 5-kinase Iγ (PIPKIγ) in PI3K/Akt signaling. PIPKIγ is overexpressed in triple-negative breast cancers. Loss of PIPKIγ or its focal adhesion-targeting variant, PIPKIγi2, impaired PI3K/Akt activation upon stimulation with growth factors or extracellular matrix proteins in different tumor cells. PIPKIγi2 assembles into a complex containing Src and PI3K; Src was required for the recruitment of PI3K enzyme into the complex. PIPKIγi2 interaction with Src and its lipid kinase activity were required for promoting PI3K/Akt signaling. These results define a mechanism by which PIPKIγi2 and PI3K are integrated into a complex regulated by Src, resulting in the spatial generation of PIP2, which is the substrate PI3K required for PIP3 generation and subsequent Akt activation. This study elucidates the mechanism by which PIP2-generating enzyme controls Akt activation upstream of a PI3K enzyme. This pathway may represent a signaling nexus required for the survival and growth of metastasizing and circulating tumor cells in vivo.
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Affiliation(s)
- Narendra Thapa
- From the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Suyong Choi
- From the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Xiaojun Tan
- From the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Thomas Wise
- From the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
| | - Richard A Anderson
- From the Molecular and Cellular Pharmacology Program, University of Wisconsin, School of Medicine and Public Health, Madison, Wisconsin 53706
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