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La Macchia T, Mancuso A, Ceravolo MD, Cuppari C, Chimenz R, Farello G, Gitto E, Iapadre G, Ceravolo I. Alström Syndrome: A Systematic Review. JOURNAL OF PEDIATRIC NEUROLOGY 2022. [DOI: 10.1055/s-0042-1759535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractAlström syndrome (AS) is a rare multisystem disorder characterized by cone-rod retinal dystrophy leading to vision loss, hearing deficiency, obesity, type 2 diabetes mellitus, and insulin resistance with hyperinsulinemia. The conditions include dilated cardiomyopathy, recurrent fibrotic pulmonary infections, and progressive renal, hepatic, and endocrinological dysfunction. Other clinical findings consist of thyroid problems, short height, and growth hormone insufficiency. In addition, patients present with normal IQ, but in some cases delay in psychomotor and cognitive development is described. There is no treatment for AS, and life expectancy is around 40 years. However, an early identification of the disease can help in reducing the progression to severe conditions and in ameliorating the patient's quality of life. Our intent was to analyze the clinical data in literature on AS and provide an up-to-date review.
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Affiliation(s)
- Tommaso La Macchia
- Unit of Cardiology, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Alessio Mancuso
- Department of Human Pathology and Evolutive Age “Gaetano Barresi,” University of Messina, Messina, Italy
| | - Maria Domenica Ceravolo
- Department of Human Pathology and Evolutive Age “Gaetano Barresi,” University of Messina, Messina, Italy
| | - Caterina Cuppari
- Department of Human Pathology and Evolutive Age “Gaetano Barresi,” University of Messina, Messina, Italy
| | - Roberto Chimenz
- Faculty of Medicine and Surgery, University of Messina, Messina, Italy
| | - Giovanni Farello
- Pediatric Clinic–Department of Life, Health and Environmental Sciences–Piazzale Salvatore Tommasi 1, Coppito (AQ), Italy
| | - Eloisa Gitto
- Neonatal and Pediatric Intensive Care Unit, Department of Human Pathology in Adult and Developmental Age “Gaetano Barresi,” University of Messina, Messina, Italy
| | - Giulia Iapadre
- Department of Pediatrics, University of L'Aquila, L'Aquila, Italy
| | - Ida Ceravolo
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
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Maharjan Y, Dutta RK, Son J, Wei X, Park C, Kwon HM, Park R. Intracellular cholesterol transport inhibition Impairs autophagy flux by decreasing autophagosome-lysosome fusion. Cell Commun Signal 2022; 20:189. [PMID: 36434621 PMCID: PMC9701069 DOI: 10.1186/s12964-022-00942-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/17/2022] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Autophagy is an intracellular degradation process crucial for homeostasis. During autophagy, a double-membrane autophagosome fuses with lysosome through SNARE machinery STX17 to form autolysosome for degradation of damaged organelle. Whereas defective autophagy enhances cholesterol accumulation in the lysosome and impaired autophagic flux that results Niemann-Pick type C1 (NPC1) disease. However, exact interconnection between NPC1 and autophagic flux remain obscure due to the existence of controversial reports. RESULTS This study aimed at a comparison of the effects of three autophagic inhibitor drugs, including chloroquine, U18666A, and bafilomycin A1, on the intracellular cholesterol transport and autophagy flux. Chloroquine, an autophagic flux inhibitor; U1866A, a NPC1 inhibitor, and bafilomycin A, a lysosomotropic agent are well known to inhibit autophagy by different mechanism. Here we showed that treatment with U1866A and bafilomycin A induces lysosomal cholesterol accumulation that prevented autophagic flux by decreasing autophagosome-lysosome fusion. We also demonstrated that accumulation of cholesterol within the lysosome did not affect lysosomal pH. Although the clearance of accumulated cholesterol by cyclodextrin restored the defective autophagosome-lysosome fusion, the autophagy flux restoration was possible only when lysosomal acidification was not altered. In addition, a failure of STX17 trafficking to autophagosomes plays a key role in prevention of autophagy flux caused by intracellular cholesterol transport inhibitors. CONCLUSIONS Our data provide a new insight that the impaired autophagy flux does not necessarily result in lysosomal cholesterol accumulation even though it prevents autophagosome-lysosome fusion. Video abstract.
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Affiliation(s)
- Yunash Maharjan
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea ,grid.224260.00000 0004 0458 8737School of Dentistry, Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, VA USA ,grid.224260.00000 0004 0458 8737Present Address: Department of Oral and Craniofacial Molecular Biology, School of Dentistry, Virginia Commonwealth University, Richmond, VA USA
| | - Raghbendra Kumar Dutta
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea
| | - Jinbae Son
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea
| | - Xiaofan Wei
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea
| | - Channy Park
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea
| | - Hyug Moo Kwon
- grid.42687.3f0000 0004 0381 814XSchool of Life Sciences, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | - Raekil Park
- grid.61221.360000 0001 1033 9831Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005 Republic of Korea
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3
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Yin F, Wei Z, Chen F, Xin C, Chen Q. Molecular targets of primary cilia defects in cancer (Review). Int J Oncol 2022; 61:98. [DOI: 10.3892/ijo.2022.5388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/20/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Fengying Yin
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
| | - Zihao Wei
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
| | - Fangman Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
| | - Chuan Xin
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
| | - Qianming Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang 310006, P.R. China
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4
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Masyuk AI, Masyuk TV, Trussoni CE, Pirius NE, LaRusso NF. Autophagy promotes hepatic cystogenesis in polycystic liver disease by depletion of cholangiocyte ciliogenic proteins. Hepatology 2022; 75:1110-1122. [PMID: 34942041 PMCID: PMC9035076 DOI: 10.1002/hep.32298] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUNDS AND AIMS Polycystic liver disease (PLD) is characterized by defective cholangiocyte cilia that regulate progressive growth of hepatic cysts. Because formation of primary cilia is influenced by autophagy through degradation of proteins involved in ciliogenesis, we hypothesized that ciliary defects in PLD cholangiocytes (PLDCs) originate from autophagy-mediated depletion of ciliogenic proteins ADP-ribosylation factor-like protein 3 (ARL3) and ADP-ribosylation factor-like protein 13B (ARL13B) and ARL-dependent mislocation of a ciliary-localized bile acid receptor, Takeda G-protein-coupled receptor 5 (TGR5), the activation of which enhances hepatic cystogenesis (HCG). The aims here were to determine whether: (1) ciliogenesis is impaired in PLDC, is associated with increased autophagy, and involves autophagy-mediated depletion of ARL3 and ARL13B; (2) depletion of ARL3 and ARL13B in PLDC cilia impacts ciliary localization of TGR5; and (3) pharmacological inhibition of autophagy re-establishes cholangiocyte cilia and ciliary localization of ARL3, ARL3B, and TGR5 and reduces HCG. APPROACH AND RESULTS By using liver tissue from healthy persons and patients with PLD, in vitro and in vivo models of PLD, and in vitro models of ciliogenesis, we demonstrated that, in PLDCs: ciliogenesis is impaired; autophagy is enhanced; ARL3 and ARL13B are ubiquitinated by HDAC6, depleted in cilia, and present in autophagosomes; depletion of ARL3 and ARL13B impacts ciliary localization of TGR5; and pharmacological inhibition of autophagy with mefloquine and verteporfin re-establishes cholangiocyte cilia and ciliary localization of ARL3, ARL13B, and TGR5 and reduces HCG. CONCLUSIONS The intersection between autophagy, defective cholangiocyte cilia, and enhanced HCG contributes to PLD progression and can be considered a target for therapeutic interventions.
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Affiliation(s)
- Anatoliy I. Masyuk
- Mayo Clinic College of Medicine and Science, 200 First Street, SW Rochester, Minnesota 55905, USA
| | - Tatyana V. Masyuk
- Mayo Clinic College of Medicine and Science, 200 First Street, SW Rochester, Minnesota 55905, USA
| | - Christy E. Trussoni
- Mayo Clinic College of Medicine and Science, 200 First Street, SW Rochester, Minnesota 55905, USA
| | - Nicholas E. Pirius
- Mayo Clinic College of Medicine and Science, 200 First Street, SW Rochester, Minnesota 55905, USA
| | - Nicholas F. LaRusso
- Mayo Clinic College of Medicine and Science, 200 First Street, SW Rochester, Minnesota 55905, USA
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Iaconis D, Crina C, Brillante S, Indrieri A, Morleo M, Franco B. The HOPS complex subunit VPS39 controls ciliogenesis through autophagy. Hum Mol Genet 2021; 29:1018-1029. [PMID: 32077937 PMCID: PMC7158379 DOI: 10.1093/hmg/ddaa029] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/12/2022] Open
Abstract
Primary cilia are microtubule-based organelles that assemble and protrude from the surface of most mammalian cells during quiescence. The biomedical relevance of cilia is indicated by disorders ascribed to cilia dysfunction, known as ciliopathies, that display distinctive features including renal cystic disease. In this report, we demonstrate that vacuolar protein sorting 39 (VPS39), a component of the homotypic fusion and vacuole protein sorting (HOPS) complex, acts as a negative regulator of ciliogenesis in human renal cells, by controlling the localization of the intraflagellar transport 20 protein at the base of cilia through autophagy. Moreover, we show that VPS39 controls ciliogenesis through autophagy also in vivo in renal tubules of medaka fish. These observations suggest a direct involvement of the HOPS complex in the regulation of autophagy-mediated ciliogenesis and eventually in target selection. Interestingly, we show that the impact of autophagy modulation on ciliogenesis is cell-type dependent and strictly related to environmental stimuli. This report adds a further tile to the cilia-autophagy connection and suggests that VPS39 could represent a new biological target for the recovery of the cilia-related phenotypes observed in the kidneys of patients affected by ciliopathies.
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Affiliation(s)
- Daniela Iaconis
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy
| | - Claudia Crina
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy
| | - Simona Brillante
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy
| | - Alessia Indrieri
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy.,Medical Genetics, Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy.,Institute for Genetic and Biomedical Research, National Research Council, 35 20122 Milan, Italy
| | - Manuela Morleo
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy.,Medical Genetics, Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy
| | - Brunella Franco
- Telethon Institute of Genetics and Medicine, 80078 Pozzuoli, Italy.,Medical Genetics, Department of Translational Medical Sciences, University of Naples Federico II, 80131 Naples, Italy
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6
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Ray U, Roy D, Jin L, Thirusangu P, Staub J, Xiao Y, Kalogera E, Wahner Hendrickson AE, Cullen GD, Goergen K, Oberg AL, Shridhar V. Group III phospholipase A2 downregulation attenuated survival and metastasis in ovarian cancer and promotes chemo-sensitization. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:182. [PMID: 34082797 PMCID: PMC8173968 DOI: 10.1186/s13046-021-01985-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/16/2021] [Indexed: 11/13/2022]
Abstract
Background Aberrant lipogenicity and deregulated autophagy are common in most advanced human cancer and therapeutic strategies to exploit these pathways are currently under consideration. Group III Phospholipase A2 (sPLA2-III/PLA2G3), an atypical secretory PLA2, is recognized as a regulator of lipid metabolism associated with oncogenesis. Though recent studies reveal that high PLA2G3 expression significantly correlates with poor prognosis in several cancers, however, role of PLA2G3 in ovarian cancer (OC) pathogenesis is still undetermined. Methods CRISPR-Cas9 and shRNA mediated knockout and knockdown of PLA2G3 in OC cells were used to evaluate lipid droplet (LD) biogenesis by confocal and Transmission electron microscopy analysis, and the cell viability and sensitization of the cells to platinum-mediated cytotoxicity by MTT assay. Regulation of primary ciliation by PLA2G3 downregulation both genetically and by metabolic inhibitor PFK-158 induced autophagy was assessed by immunofluorescence-based confocal analysis and immunoblot. Transient transfection with GFP-RFP-LC3B and confocal analysis was used to assess the autophagic flux in OC cells. PLA2G3 knockout OVCAR5 xenograft in combination with carboplatin on tumor growth and metastasis was assessed in vivo. Efficacy of PFK158 alone and with platinum drugs was determined in patient-derived primary ascites cultures expressing PLA2G3 by MTT assay and immunoblot analysis. Results Downregulation of PLA2G3 in OVCAR8 and 5 cells inhibited LD biogenesis, decreased growth and sensitized cells to platinum drug mediated cytotoxicity in vitro and in in vivo OVCAR5 xenograft. PLA2G3 knockdown in HeyA8MDR-resistant cells showed sensitivity to carboplatin treatment. We found that both PFK158 inhibitor-mediated and genetic downregulation of PLA2G3 resulted in increased number of percent ciliated cells and inhibited cancer progression. Mechanistically, we found that PFK158-induced autophagy targeted PLA2G3 to restore primary cilia in OC cells. Of clinical relevance, PFK158 also induces percent ciliated cells in human-derived primary ascites cells and reduces cell viability with sensitization to chemotherapy. Conclusions Taken together, our study for the first time emphasizes the role of PLA2G3 in regulating the OC metastasis. This study further suggests the therapeutic potential of targeting phospholipases and/or restoration of PC for future OC treatment and the critical role of PLA2G3 in regulating ciliary function by coordinating interface between lipogenesis and metastasis. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-021-01985-9.
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Affiliation(s)
- Upasana Ray
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Debarshi Roy
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.,Alcorn State University, Lorman, MS, USA
| | - Ling Jin
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Prabhu Thirusangu
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Julie Staub
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Yinan Xiao
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | | | | | - Grace D Cullen
- Department of Internal Medicine, Division of Medical Oncology, Mayo Clinic, Rochester, MN, USA
| | - Krista Goergen
- Department of Health Sciences Research, Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Ann L Oberg
- Department of Health Sciences Research, Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Viji Shridhar
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.
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Doornbos C, Roepman R. Moonlighting of mitotic regulators in cilium disassembly. Cell Mol Life Sci 2021; 78:4955-4972. [PMID: 33860332 PMCID: PMC8233288 DOI: 10.1007/s00018-021-03827-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/03/2021] [Accepted: 03/27/2021] [Indexed: 02/07/2023]
Abstract
Correct timing of cellular processes is essential during embryological development and to maintain the balance between healthy proliferation and tumour formation. Assembly and disassembly of the primary cilium, the cell’s sensory signalling organelle, are linked to cell cycle timing in the same manner as spindle pole assembly and chromosome segregation. Mitotic processes, ciliary assembly, and ciliary disassembly depend on the centrioles as microtubule-organizing centres (MTOC) to regulate polymerizing and depolymerizing microtubules. Subsequently, other functional protein modules are gathered to potentiate specific protein–protein interactions. In this review, we show that a significant subset of key mitotic regulator proteins is moonlighting at the cilium, among which PLK1, AURKA, CDC20, and their regulators. Although ciliary assembly defects are linked to a variety of ciliopathies, ciliary disassembly defects are more often linked to brain development and tumour formation. Acquiring a better understanding of the overlap in regulators of ciliary disassembly and mitosis is essential in finding therapeutic targets for the different diseases and types of tumours associated with these regulators.
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Affiliation(s)
- Cenna Doornbos
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands.,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ronald Roepman
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands. .,Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.
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8
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Venard CM, Vasudevan KK, Stearns T. Cilium axoneme internalization and degradation in chytrid fungi. Cytoskeleton (Hoboken) 2020; 77:365-378. [PMID: 33103844 PMCID: PMC7944584 DOI: 10.1002/cm.21637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/12/2020] [Accepted: 10/13/2020] [Indexed: 12/16/2022]
Abstract
Loss of the cilium is important for cell cycle progression and certain developmental transitions. Chytrid fungi are a group of basal fungi that have retained centrioles and cilia, and they can disassemble their cilia via axoneme internalization as part of the transition from free-swimming spores to sessile sporangia. While this type of cilium disassembly has been observed in many single-celled eukaryotes, it has not been well characterized because it is not observed in common model organisms. To better characterize cilium disassembly via axoneme internalization, we focused on chytrids Rhizoclosmatium globosum and Spizellomyces punctatus to represent two lineages of chytrids with different motility characteristics. Our results show that each chytrid species can reel in its axoneme into the cell body along its cortex on the order of minutes, while S. punctatus has additional faster ciliary compartment loss and lash-around mechanisms. S. punctatus retraction can also occur away from the cell cortex and is partially actin dependent. Post-internalization, the tubulin of the axoneme is degraded in both chytrids over the course of about 2 hr. Axoneme disassembly and axonemal tubulin degradation are both partially proteasome dependent. Overall, chytrid cilium disassembly is a fast process that separates axoneme internalization and degradation.
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Affiliation(s)
- Claire M Venard
- Department of Biology, Stanford University, Stanford, California
| | | | - Tim Stearns
- Department of Biology, Stanford University, Stanford, California
- Department of Genetics, Stanford University, Stanford, California
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9
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Mu Y, Maharjan Y, Dutta RK, Kim H, Wei X, Kim JH, Kim D, Park C, Park R. Dimethyloxaloylglycine induces pexophagy in a HIF-2α dependent manner involving autophagy receptor p62. Biochem Biophys Res Commun 2020; 525:S0006-291X(20)30319-3. [PMID: 32075719 DOI: 10.1016/j.bbrc.2020.02.051] [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: 01/29/2020] [Accepted: 02/08/2020] [Indexed: 02/06/2023]
Abstract
Peroxisomes are metabolically active oxygen demanding organelles with a high abundance of oxidases making it vulnerable to low oxygen levels such as hypoxic conditions. However, the exact mechanism of peroxisome degradation in hypoxic condition remains elusive. In order to study the mechanism of peroxisome degradation in hypoxic condition, we use Dimethyloxaloylglycine (DMOG), a cell-permeable prolyl-4-hydroxylase inhibitor, which mimics hypoxic condition by stabilizing hypoxia-inducible factors. Here we report that DMOG degraded peroxisomes by selectively activating pexophagy in a HIF-2α dependent manner involving autophagy receptor p62. Furthermore, DMOG not only increased peroxisome turnover by pexophagy but also reduced HIF-2α dependent peroxisome proliferation at the transcriptional level. Taken together, our data suggest that hypoxic condition is a negative regulator for peroxisome abundance through increasing pexophagy and decreasing peroxisome proliferation in HIF-2α dependent manner.
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Affiliation(s)
- Yizhu Mu
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Yunash Maharjan
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Raghbendra Kumar Dutta
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Hyunsoo Kim
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Xiaofan Wei
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Jin Hwi Kim
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Donghyun Kim
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Channy Park
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea
| | - Raekil Park
- Department of Biomedical Science & Engineering, Gwangju Institute of Science & Technology, Gwangju, 61005, Republic of Korea.
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10
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Fabbri L, Bost F, Mazure NM. Primary Cilium in Cancer Hallmarks. Int J Mol Sci 2019; 20:E1336. [PMID: 30884815 PMCID: PMC6471594 DOI: 10.3390/ijms20061336] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/28/2019] [Accepted: 03/11/2019] [Indexed: 12/12/2022] Open
Abstract
The primary cilium is a solitary, nonmotile and transitory appendage that is present in virtually all mammalian cells. Our knowledge of its ultrastructure and function is the result of more than fifty years of research that has dramatically changed our perspectives on the primary cilium. The mutual regulation between ciliogenesis and the cell cycle is now well-recognized, as well as the function of the primary cilium as a cellular "antenna" for perceiving external stimuli, such as light, odorants, and fluids. By displaying receptors and signaling molecules, the primary cilium is also a key coordinator of signaling pathways that converts extracellular cues into cellular responses. Given its critical tasks, any defects in primary cilium formation or function lead to a wide spectrum of diseases collectively called "ciliopathies". An emerging role of primary cilium is in the regulation of cancer development. In this review, we seek to describe the current knowledge about the influence of the primary cilium in cancer progression, with a focus on some of the events that cancers need to face to sustain survival and growth in hypoxic microenvironment: the cancer hallmarks.
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Affiliation(s)
- Lucilla Fabbri
- Université Côte d'Azur (UCA), INSERM U1065, C3M, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice, France.
| | - Frédéric Bost
- Université Côte d'Azur (UCA), INSERM U1065, C3M, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice, France.
| | - Nathalie M Mazure
- Université Côte d'Azur (UCA), INSERM U1065, C3M, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice, France.
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