1
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Lei Y, He L, Li Y, Hou J, Zhang H, Li G. PDLIM1 interacts with HK2 to promote gastric cancer progression through enhancing the Warburg effect via Wnt/β-catenin signaling. Cell Tissue Res 2024; 395:105-116. [PMID: 37930472 DOI: 10.1007/s00441-023-03840-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 10/27/2023] [Indexed: 11/07/2023]
Abstract
PDZ and LIM domain protein 1 (PDLIM1) is a cytoskeletal protein and is associated with the malignant pathological features of several tumors. However, the prognostic value of PDLIM1 and the molecular mechanisms by which it is involved in the metabolism and progression in gastric cancer (GC) are still unclear. The GEPIA database was used to predict the expression and prognosis of PDLIM1 in GC. qRT-PCR and western blot assays were applied to detect the mRNA and protein expression in GC tissues and cells. Loss- and gain-of-function experiments were performed to evaluate the biological role of PDLIM1 in GC cells. The Warburg effect was detected by a battery of glycolytic indicators. The interaction of PDLIM1 and hexokinase 2 (HK2) was determined by a co-immunoprecipitation assay. Furthermore, the modulatory effects of PDLIM1 and HK2 on Wnt/β-catenin signaling were assessed. The results showed that PDLIM1 expression was upregulated in GC tissues and cells and was associated with a poor prognosis for GC patients. PDLIM1 inhibition reduced GC cell proliferation, migration and invasion and promoted cell apoptosis. In the glucose deprivation (GLU-D) condition, the PDLIM1 level was reduced and PDLIM1 overexpression led to an increase in glycolysis. Besides, mechanistic investigation showed that PDLIM1 interacted with HK2 to mediate biological behaviors and the glycolysis of GC through Wnt/β-catenin signaling under glucose deprivation. In conclusion, PDLIM1 interacts with HK2 to promote gastric cancer progression by enhancing the Warburg effect via Wnt/β-catenin signaling.
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Affiliation(s)
- Yunpeng Lei
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China
| | - Lirui He
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China
| | - Yue Li
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China
| | - Jianing Hou
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China
| | - Haoran Zhang
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China
| | - Guan Li
- Department of Gastrointestinal Surgery, Peking University Shenzhen Hospital, NO. 1120, Lianhua Road, Futian District, Shenzhen, Guangdong, 518036, China.
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2
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Qin R, Huang L, Xu W, Qin Q, Liang X, Lai X, Huang X, Xie M, Chen L. Identification of disulfidptosis-related genes and analysis of immune infiltration characteristics in ischemic strokes. MATHEMATICAL BIOSCIENCES AND ENGINEERING : MBE 2023; 20:18939-18959. [PMID: 38052584 DOI: 10.3934/mbe.2023838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Immune infiltration plays a pivotal role in the pathogenesis of ischemic stroke. A novel form of cell death known as disulfidptosis has emerged in recent studies. However, there is currently a lack of research investigating the regulatory mechanism of disulfidptosis-related genes in immune infiltration during ischemic stroke. Using machine learning methods, we identified candidate key disulfidptosis-related genes (DRGs). Subsequently, we performed an analysis of immune cell infiltration to investigate the dysregulation of immune cells in the context of ischemic stroke. We assessed their diagnostic value by employing receiver operating characteristic (ROC) curves. To gain further insights, we conducted functional enrichment analyses to elucidate the signaling pathways associated with these seven DRGs. We identified two distinct subclusters based on the expression patterns of these seven DRGs. The unique roles of these subclusters were further evaluated through KEGG analysis and immune infiltration studies. Furthermore, we validated the expression profiles of these seven DRGs using both single-cell datasets and external datasets. Lastly, molecular docking was performed to explore potential drugs for the treatment of ischemic stroke. We identified seven DRGs. The seven DRGs are related to immune cells. Additionally, these seven DRGs also demonstrate potential diagnostic value in ischemic stroke. Functional enrichment analysis highlighted pathways such as platelet aggregation and platelet activation. Two subclusters related to disulfidptosis were defined, and functional enrichment analysis of their differentially expressed genes (DEGs) primarily involved pathways like cytokine-cytokine receptor interaction. Single-cell analysis indicated that these seven DRGs were primarily distributed among immune cell types. Molecular docking results suggested that genistein might be a potential therapeutic drug. This study has opened up new avenues for exploring the causes of ischemic stroke and developing potential therapeutic targets.
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Affiliation(s)
- Rongxing Qin
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
| | - Lijuan Huang
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning 530021, China
| | - Wei Xu
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning 530021, China
| | - Qingchun Qin
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning 530021, China
| | - Xiaojun Liang
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
| | - Xinyu Lai
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
| | - Xiaoying Huang
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
| | - Minshan Xie
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
| | - Li Chen
- Department of Neurology, the First Affiliated Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, 530021, China
- State Key Laboratory of Targeting Oncology, National Center for International Research of Biotargeting Theranostics, Guangxi Key Laboratory of Biotargeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Medical University, Nanning 530021, China
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Zhang Y, Tang J, Wang X, Sun Y, Yang T, Shen X, Yang X, Shi H, Sun X, Xin A. Loss of ACTL7A causes small head sperm by defective acrosome-acroplaxome-manchette complex. Reprod Biol Endocrinol 2023; 21:82. [PMID: 37667331 PMCID: PMC10476415 DOI: 10.1186/s12958-023-01130-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/21/2023] [Indexed: 09/06/2023] Open
Abstract
BACKGROUND Actin-like 7 A (ACTL7A) is essential for acrosome formation, fertilization and early embryo development. ACTL7A variants cause acrosome detachment responsible for male infertility and early embryonic arrest. In this study, we aim to explore the additional functions of ACTL7A beyond the process of acrosome biogenesis and investigate the possible underlying mechanisms. METHODS Nuclear morphology analysis was used to observe the sperm head shape of ACTL7A-mutated patients. Actl7a knock-out (KO) mouse model was generated. Immunofluorescence and transmission electron microscopy (TEM) were performed to analyze the structure of spermatids during spermiogenesis. Tandem mass tags labeling quantitative proteomics strategy was employed to explore the underlying molecular mechanisms. The expression levels of key proteins in the pathway were analyzed by western blotting. Intracytoplasmic sperm injection (ICSI)-artificial oocyte activation (AOA) technology was utilized to overcome fertilization failure in male mice with a complete knockout of Actl7a. RESULTS The new phenotype of small head sperm associated with loss of ACTL7A in patients was discovered, and further confirmed in Actl7a-KO mice. Immunofluorescence and TEM analyses revealed that the deletion of ACTL7A damaged the formation of acrosome-acroplaxome-manchette complex, leading to abnormalities in the shaping of sperm heads. Moreover, a proteomic analysis of testes from WT and Actl7a-KO mice revealed that differentially expressed genes were notably enriched in PI3K/AKT/mTOR signaling pathway which is strongly associated with autophagy. Inhibition of autophagy via PI3K/AKT/mTOR signaling pathway activation leading to PDLIM1 accumulation might elucidate the hindered development of manchette in Actl7a-KO mice. Remarkably, AOA successfully overcame fertilization failure and allowed for the successful production of healthy offspring from the Actl7a complete knockout male mice. CONCLUSIONS Loss of ACTL7A causes small head sperm as a result of defective acrosome-acroplaxome-manchette complex via autophagy inhibition. ICSI-AOA is an effective technique to rescue male infertility resulting from ACTL7A deletion. These findings provide essential evidence for the diagnosis and treatment of patients suffering from infertility.
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Affiliation(s)
- Yini Zhang
- Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, 200011, China
| | - Jianan Tang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China
| | - Xuemei Wang
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China
| | - Yisi Sun
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China
| | - Tianying Yang
- Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, 200011, China
| | - Xiaorong Shen
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China
| | - Xinyue Yang
- Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, 200011, China
| | - Huijuan Shi
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China
| | - Xiaoxi Sun
- Shanghai Ji Ai Genetics and IVF Institute, Obstetrics and Gynecology Hospital, Fudan University, Shanghai, 200011, China.
- Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China.
| | - Aijie Xin
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, NHC Key Lab of Reproduction Regulation,Shanghai Institute for Biomedical and Pharmaceutical Technologies (SIBPT), School of Pharmacy, Fudan University, Shanghai, 200032, China.
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Proteomic identification and structural basis for the interaction between sorting nexin SNX17 and PDLIM family proteins. Structure 2022; 30:1590-1602.e6. [DOI: 10.1016/j.str.2022.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 06/29/2022] [Accepted: 09/30/2022] [Indexed: 12/03/2022]
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5
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Fisher LAB, Schöck F. The unexpected versatility of ALP/Enigma family proteins. Front Cell Dev Biol 2022; 10:963608. [PMID: 36531944 PMCID: PMC9751615 DOI: 10.3389/fcell.2022.963608] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 11/22/2022] [Indexed: 12/04/2022] Open
Abstract
One of the most intriguing features of multicellular animals is their ability to move. On a cellular level, this is accomplished by the rearrangement and reorganization of the cytoskeleton, a dynamic network of filamentous proteins which provides stability and structure in a stationary context, but also facilitates directed movement by contracting. The ALP/Enigma family proteins are a diverse group of docking proteins found in numerous cellular milieus and facilitate these processes among others. In vertebrates, they are characterized by having a PDZ domain in combination with one or three LIM domains. The family is comprised of CLP-36 (PDLIM1), Mystique (PDLIM2), ALP (PDLIM3), RIL (PDLIM4), ENH (PDLIM5), ZASP (PDLIM6), and Enigma (PDLIM7). In this review, we will outline the evolution and function of their protein domains which confers their versatility. Additionally, we highlight their role in different cellular environments, focusing specifically on recent advances in muscle research using Drosophila as a model organism. Finally, we show the relevance of this protein family to human myopathies and the development of muscle-related diseases.
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6
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Wang L, Sun L, Wan QH, Fang SG. Comparative Genomics Provides Insights into Adaptive Evolution in Tactile-Foraging Birds. Genes (Basel) 2022; 13:genes13040678. [PMID: 35456484 PMCID: PMC9028243 DOI: 10.3390/genes13040678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/07/2022] [Accepted: 04/11/2022] [Indexed: 11/28/2022] Open
Abstract
Tactile-foraging birds have evolved an enlarged principal sensory nucleus (PrV) but smaller brain regions related to the visual system, which reflects the difference in sensory dependence. The “trade-off” may exist between different senses in tactile foragers, as well as between corresponding sensory-processing areas in the brain. We explored the mechanism underlying the adaptive evolution of sensory systems in three tactile foragers (kiwi, mallard, and crested ibis). The results showed that olfaction-related genes in kiwi and mallard and hearing-related genes in crested ibis were expanded, indicating they may also have sensitive olfaction or hearing, respectively. However, some genes required for visual development were positively selected or had convergent amino acid substitutions in all three tactile branches, and it seems to show the possibility of visual degradation. In addition, we may provide a new visual-degradation candidate gene PDLIM1 who suffered dense convergent amino acid substitutions within the ZM domain. At last, two genes responsible for regulating the proliferation and differentiation of neuronal progenitor cells may play roles in determining the relative sizes of sensory areas in brain. This exploration offers insight into the relationship between specialized tactile-forging behavior and the evolution of sensory abilities and brain structures.
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7
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Zhou JK, Fan X, Cheng J, Liu W, Peng Y. PDLIM1: Structure, function and implication in cancer. Cell Stress 2021; 5:119-127. [PMID: 34396044 PMCID: PMC8335553 DOI: 10.15698/cst2021.08.254] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 02/05/2023] Open
Abstract
PDLIM1, a member of the PDZ-LIM family, is a cytoskeletal protein and functions as a platform to form distinct protein complexes, thus participating in multiple physiological processes such as cytoskeleton regulation and synapse formation. Emerging evidence demonstrates that PDLIM1 is dysregualted in a variety of tumors and plays essential roles in tumor initiation and progression. In this review, we summarize the structure and function of PDLIM1, as well as its important roles in human cancers.
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Affiliation(s)
- Jian-Kang Zhou
- Laboratory of Molecular Oncology, Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xin Fan
- Laboratory of Molecular Oncology, Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jian Cheng
- Laboratory of Molecular Oncology, Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China.,Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Wenrong Liu
- Laboratory of Molecular Oncology, Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yong Peng
- Laboratory of Molecular Oncology, Frontiers Science Center for Disease-related Molecular Network, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
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8
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Dhanda AS, Yang D, Kooner A, Guttman JA. Distribution of PDLIM1 at actin-rich structures generated by invasive and adherent bacterial pathogens. Anat Rec (Hoboken) 2020; 304:919-938. [PMID: 33022122 DOI: 10.1002/ar.24523] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/06/2020] [Accepted: 07/28/2020] [Indexed: 12/15/2022]
Abstract
The enteric bacterial pathogens Listeria monocytogenes (Listeria) and enteropathogenic Escherichia coli (EPEC) remodel the eukaryotic actin cytoskeleton during their disease processes. Listeria generate slender actin-rich comet/rocket tails to move intracellularly, and later, finger-like membrane protrusions to spread amongst host cells. EPEC remain extracellular, but generate similar actin-rich membranous protrusions (termed pedestals) to move atop the host epithelia. These structures are crucial for disease as diarrheal (and systemic) infections are significantly abrogated during infections with mutant strains that are unable to generate the structures. The current repertoire of host components enriched within these structures is vast and diverse. In this protein catalog, we and others have found that host actin crosslinkers, such as palladin and α-actinin-1, are routinely exploited. To expand on this list, we set out to investigate the distribution of PDLIM1, a scaffolding protein and binding partner of palladin and α-actinin-1, during bacterial infections. We show that PDLIM1 localizes to the site of initial Listeria entry into cells. Following this, PDLIM1 localizes to actin filament clouds surrounding immotile bacteria, and then colocalizes with actin once the comet/rocket tails are generated. Unlike palladin or α-actinin-1, PDLIM1 is maintained within the actin-rich core of membrane protrusions. Conversely, α-actinin-1, but not PDLIM1 (or palladin), is enriched at the membrane invagination that internalizes the Listeria-containing membrane protrusion. We also show that PDLIM1 is a component of the EPEC pedestal core and that its recruitment is dependent on the bacterial effector Tir. Our findings highlight PDLIM1 as another protein present within pathogen-induced actin-rich structures.
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Affiliation(s)
- Aaron S Dhanda
- Department of Biological Sciences, Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Diana Yang
- Department of Biological Sciences, Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Avneen Kooner
- Department of Biological Sciences, Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Julian A Guttman
- Department of Biological Sciences, Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia, Canada
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9
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The NRF2 Signaling Network Defines Clinical Biomarkers and Therapeutic Opportunity in Friedreich's Ataxia. Int J Mol Sci 2020; 21:ijms21030916. [PMID: 32019240 PMCID: PMC7037688 DOI: 10.3390/ijms21030916] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 01/27/2020] [Accepted: 01/29/2020] [Indexed: 02/06/2023] Open
Abstract
Friedreich’s ataxia (FA) is a trinucleotide repeats expansion neurodegenerative disorder, for which no cure or approved therapies are present. In most cases, GAA trinucleotide repetitions in the first intron of the FXN gene are the genetic trigger of FA, determining a strong reduction of frataxin, a mitochondrial protein involved in iron homeostasis. Frataxin depletion impairs iron–sulfur cluster biosynthesis and determines iron accumulation in the mitochondria. Mounting evidence suggests that these defects increase oxidative stress susceptibility and reactive oxygen species production in FA, where the pathologic picture is worsened by a defective regulation of the expression and signaling pathway modulation of the transcription factor NF-E2 p45-related factor 2 (NRF2), one of the fundamental mediators of the cellular antioxidant response. NRF2 protein downregulation and impairment of its nuclear translocation can compromise the adequate cellular response to the frataxin depletion-dependent redox imbalance. As NRF2 stability, expression, and activation can be modulated by diverse natural and synthetic compounds, efforts have been made in recent years to understand if regulating NRF2 signaling might ameliorate the pathologic defects in FA. Here we provide an analysis of the pharmaceutical interventions aimed at restoring the NRF2 signaling network in FA, elucidating specific biomarkers useful for monitoring therapeutic effectiveness, and developing new therapeutic tools.
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10
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Ríos H, Paganelli AR, Fosser NS. The role of PDLIM1, a PDZ-LIM domain protein, at the ribbon synapses in the chicken retina. J Comp Neurol 2020; 528:1820-1832. [PMID: 31930728 DOI: 10.1002/cne.24855] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 01/07/2020] [Accepted: 01/08/2020] [Indexed: 01/29/2023]
Abstract
PDLIM's protein family is involved in the rearrangement of the actin cytoskeleton. In the present study, we describe the localization of PDLIM1 in chicken photoreceptors. This study provides evidence that this protein is present at the cone pedicles, as well as in other synapses of the chicken retina. Here, we demonstrate the expression pattern of PDLIM1 through immunofluorescence staining, immunoblots, subcellular fractionation, and immunoprecipitation experiments. Also, we consider the possibility that PDLIM1 may be involved in the synaptic vesicle endocytosis and/or the presynaptic trafficking of synaptic vesicles back to the nonready releasable pool. This endocytotic/exocytotic coupling requires a tight link between exocytic vesicle fusion at defined release sites and endocytic retrieval of synaptic vesicle membranes. In turn, photoreceptor ribbon synaptic structure depends on the cytoskeleton arrangement, both at the active zone-related with exocytosis-as well as at the endocytic zone-periactive zone. To our knowledge, the PDLIM1 protein has not been observed in the pre synapses of the retina. Thus, the present study describes the expression and subcellular localization of PDLIM1 for the first time, as well as its modulation by visual environment in the chicken retina.
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Affiliation(s)
- Hugo Ríos
- Universidad de Buenos Aires, Facultad de Medicina, I° U.A. Histología, Embriología, Biología Celular y Genética, Ciudad de Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencias "Prof. E. De Robertis" (IBCN), Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Alejandra R Paganelli
- Universidad de Buenos Aires, Facultad de Medicina, I° U.A. Histología, Embriología, Biología Celular y Genética, Ciudad de Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencias "Prof. E. De Robertis" (IBCN), Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Nicolás S Fosser
- Universidad de Buenos Aires, Facultad de Medicina, I° U.A. Histología, Embriología, Biología Celular y Genética, Ciudad de Buenos Aires, Argentina
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11
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Li S, Liu C, Gu L, Wang L, Shang Y, Liu Q, Wan J, Shi J, Wang F, Xu Z, Ji G, Li W. Autophagy protects cardiomyocytes from the myocardial ischaemia-reperfusion injury through the clearance of CLP36. Open Biol 2017; 6:rsob.160177. [PMID: 27512143 PMCID: PMC5008017 DOI: 10.1098/rsob.160177] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 07/08/2016] [Indexed: 12/16/2022] Open
Abstract
Cardiovascular disease (CVD) is the leading cause of the death worldwide. An increasing number of studies have found that autophagy is involved in the progression or prevention of CVD. However, the precise mechanism of autophagy in CVD, especially the myocardial ischaemia-reperfusion injury (MI/R injury), is unclear and controversial. Here, we show that the cardiomyocyte-specific disruption of autophagy by conditional knockout of Atg7 leads to severe contractile dysfunction, myofibrillar disarray and vacuolar cardiomyocytes. A negative cytoskeleton organization regulator, CLP36, was found to be accumulated in Atg7-deficient cardiomyocytes. The cardiomyocyte-specific knockout of Atg7 aggravates the MI/R injury with cardiac hypertrophy, contractile dysfunction, myofibrillar disarray and severe cardiac fibrosis, most probably due to CLP36 accumulation in cardiomyocytes. Altogether, this work reveals autophagy may protect cardiomyocytes from the MI/R injury through the clearance of CLP36, and these findings define a novel relationship between autophagy and the regulation of stress fibre in heart.
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Affiliation(s)
- Shiguo Li
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, People's Republic of China
| | - Chao Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Lei Gu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Lina Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yongliang Shang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Qiong Liu
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, People's Republic of China
| | - Junyi Wan
- Department of Radiology, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, People's Republic of China
| | - Jian Shi
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Fang Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhiliang Xu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Guangju Ji
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Wei Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Tan J, Chen XJ, Shen CL, Zhang HX, Tang LY, Lu SY, Wu WT, Kuang Y, Fei J, Wang ZG. Lacking of palladin leads to multiple cellular events changes which contribute to NTD. Neural Dev 2017; 12:4. [PMID: 28340616 PMCID: PMC5366166 DOI: 10.1186/s13064-017-0081-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 03/03/2017] [Indexed: 11/23/2022] Open
Abstract
Background The actin cytoskeleton-associated protein palladin plays an important role in cell motility, morphogenesis and adhesion. In mice, Palladin deficient embryos are lethal before embryonic day (E) 15.5, and exhibit severe cranial neural tube and body wall closure defects. However, the mechanism how palladin regulates the process of cranial neural tube closure (NTC) remains unknown. Methods In this paper, we use gene knockout mouse to elucidate the function of palladin in the regulation of NTC process. Results We initially focuse on the expression pattern of palladin and found that in embryonic brain, palladin is predominantly expressed in the neural folds at E9.5. We further check the major cellular events in the neural epithelium that may contribute to NTC during the early embryogenesis. Palladin deficiency leads to a disturbance of cytoskeleton in the neural tube and the cultured neural progenitors. Furthermore, increased cell proliferation, decreased cell differentiation and diminished apical cell apoptosis of neural epithelium are found in palladin deficient embryos. Cell cycle of neural progenitors in Palladin-/- embryos is much shorter than that in wt ones. Cell adhesion shows a reduction in Palladin-/- neural tubes. Conclusions Palladin is expressed with proper spatio-temporal pattern in the neural folds. It plays a crucial role in regulating mouse cranial NTC by modulating cytoskeleton, proliferation, differentiation, apoptosis, and adhesion of neural epithelium. Our findings facilitate further study of the function of palladin and the underlying molecular mechanism involved in NTC. Electronic supplementary material The online version of this article (doi:10.1186/s13064-017-0081-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Juan Tan
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China.,Model Organism Division, E-Institutes of Shanghai Universities, SJTUSM, Shanghai, 200025, China
| | - Xue-Jiao Chen
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China.,Model Organism Division, E-Institutes of Shanghai Universities, SJTUSM, Shanghai, 200025, China
| | - Chun-Ling Shen
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China
| | - Hong-Xin Zhang
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China
| | - Ling-Yun Tang
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China.,Model Organism Division, E-Institutes of Shanghai Universities, SJTUSM, Shanghai, 200025, China
| | - Shun-Yuan Lu
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China
| | - Wen-Ting Wu
- Shanghai Research Center for Model Organisms, Shanghai, 201203, China
| | - Ying Kuang
- Shanghai Research Center for Model Organisms, Shanghai, 201203, China
| | - Jian Fei
- Shanghai Research Center for Model Organisms, Shanghai, 201203, China
| | - Zhu-Gang Wang
- State Key Laboratory of Medical Genomics, Research Center for Experimental Medicine, Rui-Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Building 17, No. 197, Ruijin 2nd Rd, Shanghai, 200025, China. .,Model Organism Division, E-Institutes of Shanghai Universities, SJTUSM, Shanghai, 200025, China. .,Shanghai Research Center for Model Organisms, Shanghai, 201203, China.
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13
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Shang Y, Wang H, Jia P, Zhao H, Liu C, Liu W, Song Z, Xu Z, Yang L, Wang Y, Li W. Autophagy regulates spermatid differentiation via degradation of PDLIM1. Autophagy 2016; 12:1575-92. [PMID: 27310465 DOI: 10.1080/15548627.2016.1192750] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Spermiogenesis is a complex and highly ordered spermatid differentiation process that requires reorganization of cellular structures. We have previously found that Atg7 is required for acrosome biogenesis. Here, we show that autophagy regulates the round and elongating spermatids. Specifically, we found that Atg7 is required for spermatozoa flagella biogenesis and cytoplasm removal during spermiogenesis. Spermatozoa motility of atg7-null mice dropped significantly with some extra-cytoplasm retained on the mature sperm head. These defects are associated with an impairment of the cytoskeleton organization. Functional screening revealed that the negative cytoskeleton organization regulator, PDLIM1 (PDZ and LIM domain 1 [elfin]), needs to be degraded by the autophagy-lysosome-dependent pathway to facilitate the proper organization of the cytoskeleton. Our results thus provide a novel mechanism showing that autophagy regulates cytoskeleton organization mainly via degradation of PDLIM1 to facilitate the differentiation of spermatids.
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Affiliation(s)
- Yongliang Shang
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Hongna Wang
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Pengfei Jia
- c State Key Laboratory of Molecular Developmental Biology and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Haichao Zhao
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Chao Liu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Weixiao Liu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China
| | - Zhenhua Song
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Zhiliang Xu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Lin Yang
- c State Key Laboratory of Molecular Developmental Biology and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Yanfang Wang
- d State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences , Beijing , China
| | - Wei Li
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China
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14
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Hayashi G, Cortopassi G. Lymphoblast Oxidative Stress Genes as Potential Biomarkers of Disease Severity and Drug Effect in Friedreich's Ataxia. PLoS One 2016; 11:e0153574. [PMID: 27078885 PMCID: PMC4831832 DOI: 10.1371/journal.pone.0153574] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Accepted: 03/31/2016] [Indexed: 11/25/2022] Open
Abstract
There is no current approved therapy for the ultimately lethal neuro- and cardio-degenerative disease Friedreich's ataxia (FA). Finding minimally-invasive molecular biomarkers of disease progression and drug effect could support smaller, shorter clinical trials. Since we and others have noted a deficient oxidative stress response in FA, we investigated the expression of 84 genes involved in oxidative stress, signaling, and protection in control and FA lymphoblasts ranging from 460 to 1122 GAA repeats. Several antioxidant genes responded in a dose-dependent manner to frataxin expression at the mRNA and protein levels, which is inversely correlated with disease progression and severity. We tested the effect of experimental Friedreich's ataxia therapies dimethyl fumarate (DMF) and type 1 histone deacetylase inhibitor (HDACi) on biomarker mRNA expression. We observed that exposure of lymphoblasts to DMF and HDACi dose-dependently unsilenced frataxin expression and restored the potential biomarkers NCF2 and PDLIM1 expression to control levels. We suggest that in addition to frataxin expression, blood lymphoblast levels of NCF2 and PDLIM1 could be useful biomarkers for disease progression and drug effect in future clinical trials of Friedreich's ataxia.
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Affiliation(s)
- Genki Hayashi
- Department of Molecular Biosciences, University of California Davis, Davis, California, United States of America
| | - Gino Cortopassi
- Department of Molecular Biosciences, University of California Davis, Davis, California, United States of America
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15
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Liu C, Wang H, Shang Y, Liu W, Song Z, Zhao H, Wang L, Jia P, Gao F, Xu Z, Yang L, Gao F, Li W. Autophagy is required for ectoplasmic specialization assembly in sertoli cells. Autophagy 2016; 12:814-32. [PMID: 26986811 DOI: 10.1080/15548627.2016.1159377] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The ectoplasmic specialization (ES) is essential for Sertoli-germ cell communication to support all phases of germ cell development and maturity. Its formation and remodeling requires rapid reorganization of the cytoskeleton. However, the molecular mechanism underlying the regulation of ES assembly is still largely unknown. Here, we show that Sertoli cell-specific disruption of autophagy influenced male mouse fertility due to the resulting disorganized seminiferous tubules and spermatozoa with malformed heads. In autophagy-deficient mouse testes, cytoskeleton structures were disordered and ES assembly was disrupted. The disorganization of the cytoskeleton structures might be caused by the accumulation of a negative cytoskeleton organization regulator, PDLIM1, and these defects could be partially rescued by Pdlim1 knockdown in autophagy-deficient Sertoli cells. Altogether, our works reveal that the degradation of PDLIM1 by autophagy in Sertoli cells is important for the proper assembly of the ES, and these findings define a novel role for autophagy in Sertoli cell-germ cell communication.
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Affiliation(s)
- Chao Liu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Hongna Wang
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Yongliang Shang
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Weixiao Liu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China
| | - Zhenhua Song
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Haichao Zhao
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Lina Wang
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Pengfei Jia
- c State Key Laboratory of Molecular Developmental Biology and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Fengyi Gao
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China
| | - Zhiliang Xu
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Lin Yang
- c State Key Laboratory of Molecular Developmental Biology and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Fei Gao
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
| | - Wei Li
- a State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences , Beijing , China.,b University of Chinese Academy of Sciences , Beijing , China
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16
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Ahn BY, Saldanha-Gama RFG, Rahn JJ, Hao X, Zhang J, Dang NH, Alshehri M, Robbins SM, Senger DL. Glioma invasion mediated by the p75 neurotrophin receptor (p75(NTR)/CD271) requires regulated interaction with PDLIM1. Oncogene 2015; 35:1411-22. [PMID: 26119933 PMCID: PMC4800290 DOI: 10.1038/onc.2015.199] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 04/23/2015] [Accepted: 05/10/2015] [Indexed: 01/05/2023]
Abstract
The invasive nature of glioblastoma renders them incurable by current therapeutic interventions. Using a novel invasive human glioma model, we previously identified the neurotrophin receptor p75NTR (aka CD271) as a mediator of glioma invasion. Herein, we provide evidence that preventing phosphorylation of p75NTR on S303 by pharmacological inhibition of PKA, or by a mutational strategy (S303G), cripples p75NTR-mediated glioma invasion resulting in serine phosphorylation within the C-terminal PDZ-binding motif (SPV) of p75NTR. Consistent with this, deletion (ΔSPV) or mutation (SPM) of the PDZ motif results in abrogation of p75NTR-mediated invasion. Using a peptide-based strategy, we identified PDLIM1 as a novel signaling adaptor for p75NTR and provide the first evidence for a regulated interaction via S425 phosphorylation. Importantly, PDLIM1 was shown to interact with p75NTR in highly invasive patient-derived glioma stem cells/tumor-initiating cells and shRNA knockdown of PDLIM1 in vitro and in vivo results in complete ablation of p75NTR-mediated invasion. Collectively, these data demonstrate a requirement for a regulated interaction of p75NTR with PDLIM1 and suggest that targeting either the PDZ domain interactions and/or the phosphorylation of p75NTR by PKA could provide therapeutic strategies for patients with glioblastoma.
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Affiliation(s)
- B Y Ahn
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Hughes Childhood Cancer Program, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - R F G Saldanha-Gama
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
| | - J J Rahn
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Hughes Childhood Cancer Program, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - X Hao
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Hughes Childhood Cancer Program, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - J Zhang
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
| | - N-H Dang
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
| | - M Alshehri
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
| | - S M Robbins
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Hughes Childhood Cancer Program, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
| | - D L Senger
- Southern Alberta Cancer Research Institute, University of Calgary, Calgary, Alberta, Canada.,Hughes Childhood Cancer Program, University of Calgary, Calgary, Alberta, Canada.,Department of Oncology, University of Calgary, Calgary, Alberta, Canada.,Clark H. Smith Brain Tumour Centre, University of Calgary, Calgary, Alberta, Canada
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17
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Miyazaki K, Ohno K, Tamura N, Sasaki T, Sato K. CLP36 and RIL recruit α-actinin-1 to stress fibers and differentially regulate stress fiber dynamics in F2408 fibroblasts. Exp Cell Res 2012; 318:1716-25. [PMID: 22659164 DOI: 10.1016/j.yexcr.2012.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/01/2012] [Accepted: 05/06/2012] [Indexed: 01/09/2023]
Abstract
CLP36 is a member of the ALP/Enigma protein family and has been shown to be localized to stress fibers in various cells. We previously reported that depletion of CLP36 caused loss of stress fibers in BeWo choriocarcinoma cells, but it remains unclear how CLP36 contributes to stress fiber formation. In this study, we generated CLP36-depleted F2408 fibroblasts and found that stress fibers showed abnormal non-oriented organization in these cells. In addition to CLP36, F2408 cells contained RIL, another ALP/Enigma protein, and we demonstrated that RIL could compensate for the role of CLP36 in stress fiber formation. CLP36 and RIL form a complex with α-actinin-1 and palladin. We found a strong correlation between loss of CLP36/RIL and failure of α-actinin-1 or palladin to localize on stress fibers. In addition, time lapse observation revealed that incorporation of RIL stabilizes stress fibers and that CLP36 influences the dynamic architecture of these fibers. Our findings indicate that CLP36 and RIL have a redundant role in the formation of stress fibers, but have different effects on stress fiber dynamics in F2408 cells.
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Affiliation(s)
- Kazufumi Miyazaki
- Department of Anatomy, Hamamatsu University School of Medicine, 431-3192 Shizuoka, Japan.
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