1
|
Guo D, Liu S, Zhang J, Gu X, Shi L, Su Y, Xu S, Ju R, Wei Y, Liu C. Prickle1-driven basement membrane deposition of the iPSC-derived embryoid bodies is separable from the establishment of apicobasal polarity. Cell Prolif 2024; 57:e13595. [PMID: 38185785 DOI: 10.1111/cpr.13595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/07/2023] [Accepted: 12/19/2023] [Indexed: 01/09/2024] Open
Abstract
Basement membrane (BM) component deposition is closely linked to the establishment of cell polarity. Previously, we showed that Prickle1 is crucial for BM deposition and cell polarity events in tear duct elongation. To gain a deeper understanding of the intimate relationship between BM formation and cell polarity, we generated induced pluripotent stem cells (iPSCs)-derived embryoid bodies (EBs) with a basement membrane separating the visceral endoderm (VE) and inner EB cell mass. We found that Prickle1 was highly expressed in VE of the normal EBs, and the Prickle1 mutant EBs displayed severely impaired BM. Notably, the formation of the basement membrane appeared to rely on the proper microtubule network of the VE cells, which was disrupted in the Prickle1 mutant EBs. Moreover, disruption of vesicle trafficking in the VE hindered BM secretion. Furthermore, reintroducing Prickle1 in the mutant EBs completely rescued BM formation but not the apicobasal cell polarity of the VE. Our data, in conjunction with studies by others, highlight the conserved role of Prickle1 in directing the secretion of BM components of the VE cells during embryonic germ layer differentiation, even in the absence of established general polarity machinery. Our study introduces a novel system based on iPSCs-derived EBs for investigating cellular and molecular events associated with cell polarity.
Collapse
Affiliation(s)
- Dianlei Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Sikai Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Jiao Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Xinyu Gu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Lei Shi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yingchun Su
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Shujuan Xu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Rong Ju
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yanhong Wei
- Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Chunqiao Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, China
| |
Collapse
|
2
|
Guzewska MM, Witek KJ, Karnas E, Rawski M, Zuba-Surma E, Kaczmarek MM. miR-125b-5p impacts extracellular vesicle biogenesis, trafficking, and EV subpopulation release in the porcine trophoblast by regulating ESCRT-dependent pathway. FASEB J 2023; 37:e23054. [PMID: 37402070 DOI: 10.1096/fj.202300710r] [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: 04/11/2023] [Revised: 05/23/2023] [Accepted: 06/12/2023] [Indexed: 07/05/2023]
Abstract
Intercellular communication is a critical process that ensures cooperation between distinct cell types at the embryo-maternal interface. Extracellular vesicles (EVs) are considered to be potent mediators of this communication by transferring biological information in their cargo (e.g., miRNAs) to the recipient cells. miRNAs are small non-coding RNAs that affect the function and fate of neighboring and distant cells by regulating gene expression. Focusing on the maternal side of the dialog, we recently revealed the impact of embryonic signals, including miRNAs, on EV-mediated cell-to-cell communication. In this study, we show the regulatory mechanism of the miR-125b-5p ESCRT-mediated EV biogenesis pathway and the further secretion of EVs by trophoblasts at the time when the crucial steps of implantation are taking place. To test the ability of miR-125b-5p to influence the expression of genes involved in the generation and release of EV subpopulations in porcine conceptuses, we used an ex vivo approach. Next, in silico and in vitro analyses were performed to confirm miRNA-mRNA interactions. Finally, EV trafficking and release were assessed using several imaging and particle analysis tools. Our results indicated that conceptus development and implantation are accompanied by changes in the abundance of EV biogenesis and trafficking machinery. ESCRT-dependent EV biogenesis and the further secretion of EVs were modulated by miR-125b-5p, specifically impacting the ESCRT-II complex (via VPS36) and EV trafficking in primary porcine trophoblast cells. The identified miRNA-ESCRT interplay led to the generation and secretion of specific subpopulations of EVs. miRNA present at the embryo-maternal interface governs EV-mediated communication between the mother and the developing conceptus, leading to the generation, trafficking, and release of characteristic subpopulations of EVs.
Collapse
Affiliation(s)
- Maria M Guzewska
- Department of Hormonal Action Mechanisms, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Krzysztof J Witek
- Cell and Tissue Analysis and Imaging Laboratory, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Elżbieta Karnas
- Department of Cell Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Michał Rawski
- Małopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland
| | - Ewa Zuba-Surma
- Department of Cell Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Monika M Kaczmarek
- Department of Hormonal Action Mechanisms, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
- Molecular Biology Laboratory, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| |
Collapse
|
3
|
Alfonso-Pérez T, Baonza G, Herranz G, Martín-Belmonte F. Deciphering the interplay between autophagy and polarity in epithelial tubulogenesis. Semin Cell Dev Biol 2022; 131:160-172. [PMID: 35641407 DOI: 10.1016/j.semcdb.2022.05.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 05/17/2022] [Accepted: 05/18/2022] [Indexed: 12/14/2022]
Abstract
The Metazoan complexity arises from a primary building block, the epithelium, which comprises a layer of polarized cells that divide the organism into compartments. Most of these body compartments are organs formed by epithelial tubes that enclose an internal hollow space or lumen. Over the last decades, multiple studies have unmasked the paramount events required to form this lumen de novo. In epithelial cells, these events mainly involve recognizing external clues, establishing and maintaining apicobasal polarity, endo-lysosomal trafficking, and expanding the created lumen. Although canonical autophagy has been classically considered a catabolic process needed for cell survival, multiple studies have also emphasized its crucial role in epithelial polarity, morphogenesis and cellular homeostasis. Furthermore, non-canonical autophagy pathways have been recently discovered as atypical secretory routes. Both canonical and non-canonical pathways play essential roles in epithelial polarity and lumen formation. This review addresses how the molecular machinery for epithelial polarity and autophagy interplay in different processes and how autophagy functions influence lumenogenesis, emphasizing its role in the lumen formation key events.
Collapse
Affiliation(s)
- Tatiana Alfonso-Pérez
- Program of Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo, Ochoa", CSIC-UAM, Madrid 28049, Spain; Ramon & Cajal Health Research Institute (IRYCIS), Hospital Universitario Ramón y Cajal, Madrid 28034, Spain
| | - Gabriel Baonza
- Program of Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo, Ochoa", CSIC-UAM, Madrid 28049, Spain
| | - Gonzalo Herranz
- Program of Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo, Ochoa", CSIC-UAM, Madrid 28049, Spain; Ramon & Cajal Health Research Institute (IRYCIS), Hospital Universitario Ramón y Cajal, Madrid 28034, Spain
| | - Fernando Martín-Belmonte
- Program of Tissue and Organ Homeostasis, Centro de Biología Molecular "Severo, Ochoa", CSIC-UAM, Madrid 28049, Spain; Ramon & Cajal Health Research Institute (IRYCIS), Hospital Universitario Ramón y Cajal, Madrid 28034, Spain.
| |
Collapse
|
4
|
Rai P, Kumar Roy J. Endosomal recycling protein Rab11 in Parkin and Pink1 signaling in Drosophila model of Parkinson's disease. Exp Cell Res 2022; 420:113357. [PMID: 36116557 DOI: 10.1016/j.yexcr.2022.113357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/23/2022] [Accepted: 09/11/2022] [Indexed: 11/16/2022]
Abstract
Neurodegenerative diseases are progressive disorders of the nervous system primarily affecting the loss of neuronal cells present in the brain. Although most neurodegenerative cases are sporadic, some familial genes are found to be involved in the neurodegenerative diseases. The extensively studied parkin and pink1 gene products are known to be involved in the removal of damaged mitochondria via autophagy (mitophagy), a quality control process. If the function of any of these genes is somehow disrupted, accumulation of damaged mitochondria occurs in the forms of protein aggregates in the cytoplasm, leading to formation of the Lewy-bodies. Autophagy is an important catabolic process where the endosomal Rab proteins are seen to be involved. Rab11, an endosomal recycling protein, serves as an ATG9A carrier that helps in autophagosome formation and maturation. Earlier studies have reported that loss of Rab11 prevents the fusion of autophagosomes with the late endosomes hampering the autophagy pathway resulting in apoptosis of cells. In this study, we have emphasized on the importance and functional role of Rab11 in the molecular pathway of Parkin/Pink1 in Parkinson's disease.
Collapse
Affiliation(s)
- Pooja Rai
- Cytogenetics Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Jagat Kumar Roy
- Cytogenetics Laboratory, Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| |
Collapse
|
5
|
Ahmad T, Vullhorst D, Chaudhuri R, Guardia CM, Chaudhary N, Karavanova I, Bonifacino JS, Buonanno A. Transcytosis and trans-synaptic retention by postsynaptic ErbB4 underlie axonal accumulation of NRG3. J Cell Biol 2022; 221:213222. [PMID: 35579602 PMCID: PMC9118086 DOI: 10.1083/jcb.202110167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 04/18/2022] [Accepted: 04/27/2022] [Indexed: 01/07/2023] Open
Abstract
Neuregulins (NRGs) are EGF-like ligands associated with cognitive disorders. Unprocessed proNRG3 is cleaved by BACE1 to generate the mature membrane-bound NRG3 ligand, but the subcellular site of proNRG3 cleavage, mechanisms underlying its transport into axons, and presynaptic accumulation remain unknown. Using an optogenetic proNRG3 cleavage reporter (LA143-NRG3), we investigate the spatial-temporal dynamics of NRG3 processing and sorting in neurons. In dark conditions, unprocessed LA143-NRG3 is retained in the trans-Golgi network but, upon photoactivation, is cleaved by BACE1 and released from the TGN. Mature NRG3 then emerges on the somatodendritic plasma membrane from where it is re-endocytosed and anterogradely transported on Rab4+ vesicles into axons via transcytosis. By contrast, the BACE1 substrate APP is sorted into axons on Rab11+ vesicles. Lastly, by a mechanism we denote "trans-synaptic retention," NRG3 accumulates at presynaptic terminals by stable interaction with its receptor ErbB4 on postsynaptic GABAergic interneurons. We propose that trans-synaptic retention may account for polarized expression of other neuronal transmembrane ligands and receptors.
Collapse
Affiliation(s)
- Tanveer Ahmad
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD,Multidisciplinary Centre for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, India
| | - Detlef Vullhorst
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD
| | - Rituparna Chaudhuri
- Molecular and Cellular Neuroscience, Neurovirology Section, National Brain Research Centre, Haryana, India
| | - Carlos M. Guardia
- Section on Intracellular Protein Trafficking, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD
| | - Nisha Chaudhary
- Multidisciplinary Centre for Advanced Research and Studies, Jamia Millia Islamia, New Delhi, India
| | - Irina Karavanova
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD
| | - Juan S. Bonifacino
- Section on Intracellular Protein Trafficking, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD
| | - Andres Buonanno
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD,Correspondence to Andres Buonanno:
| |
Collapse
|
6
|
Di Giaimo R, Penna E, Pizzella A, Cirillo R, Perrone-Capano C, Crispino M. Cross Talk at the Cytoskeleton-Plasma Membrane Interface: Impact on Neuronal Morphology and Functions. Int J Mol Sci 2020; 21:ijms21239133. [PMID: 33266269 PMCID: PMC7730950 DOI: 10.3390/ijms21239133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/18/2020] [Accepted: 11/29/2020] [Indexed: 12/13/2022] Open
Abstract
The cytoskeleton and its associated proteins present at the plasma membrane not only determine the cell shape but also modulate important aspects of cell physiology such as intracellular transport including secretory and endocytic pathways. Continuous remodeling of the cell structure and intense communication with extracellular environment heavily depend on interactions between cytoskeletal elements and plasma membrane. This review focuses on the plasma membrane-cytoskeleton interface in neurons, with a special emphasis on the axon and nerve endings. We discuss the interaction between the cytoskeleton and membrane mainly in two emerging topics of neurobiology: (i) production and release of extracellular vesicles and (ii) local synthesis of new proteins at the synapses upon signaling cues. Both of these events contribute to synaptic plasticity. Our review provides new insights into the physiological and pathological significance of the cytoskeleton-membrane interface in the nervous system.
Collapse
Affiliation(s)
- Rossella Di Giaimo
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy; (E.P.); (A.P.); (R.C.)
- Correspondence: (R.D.G.); (M.C.)
| | - Eduardo Penna
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy; (E.P.); (A.P.); (R.C.)
| | - Amelia Pizzella
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy; (E.P.); (A.P.); (R.C.)
| | - Raffaella Cirillo
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy; (E.P.); (A.P.); (R.C.)
| | - Carla Perrone-Capano
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy;
- Institute of Genetics and Biophysics “Adriano Buzzati Traverso”, National Research Council (CNR), 80131 Naples, Italy
| | - Marianna Crispino
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy; (E.P.); (A.P.); (R.C.)
- Correspondence: (R.D.G.); (M.C.)
| |
Collapse
|
7
|
Control of endothelial tubulogenesis by Rab and Ral GTPases, and apical targeting of caveolin-1-labeled vacuoles. PLoS One 2020; 15:e0235116. [PMID: 32569321 PMCID: PMC7307772 DOI: 10.1371/journal.pone.0235116] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 06/08/2020] [Indexed: 12/26/2022] Open
Abstract
Here, we examine known GTPase regulators of vesicle trafficking events to assess whether they affect endothelial cell (EC) lumen and tube formation. We identify novel roles for the small GTPases Rab3A, Rab3B, Rab8A, Rab11A, Rab27A, RalA, RalB and caveolin-1 in co-regulating membrane trafficking events that control EC lumen and tube formation. siRNA suppression of individual GTPases such as Rab3A, Rab8A, and RalB markedly inhibit tubulogenesis, while greater blockade is observed with combinations of siRNAs such as Rab3A and Rab3B, Rab8A and Rab11A, and RalA and RalB. These combinations of siRNAs also disrupt very early events in lumen formation including the formation of intracellular vacuoles. In contrast, knockdown of the endocytosis regulator, Rab5A, fails to inhibit EC tube formation. Confocal microscopy and real-time videos reveal that caveolin-1 strongly labels intracellular vacuoles and localizes to the EC apical surface as they fuse to form the luminal membrane. In contrast, Cdc42 and Rab11A localize to a perinuclear, subapical region where intracellular vacuoles accumulate and fuse during lumen formation. Our new data demonstrates that EC tubulogenesis is coordinated by a series of small GTPases to control polarized membrane trafficking events to generate, deliver, and fuse caveolin-1-labeled vacuoles to create the apical membrane surface.
Collapse
|
8
|
Blum IR, Behling-Hess C, Padilla-Rodriguez M, Momtaz S, Cox C, Wilson JM. Rab22a regulates the establishment of epithelial polarity. Small GTPases 2020; 12:282-293. [PMID: 32281471 DOI: 10.1080/21541248.2020.1754104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Membrane trafficking establishes and maintains epithelial polarity. Rab22a has a polarized distribution in activated T-cells, but its role in epithelial polarity has not been investigated. We showed previously that Rab14 acts upstream of Arf6 to establish the apical membrane initiation site (AMIS), but its interaction with Rab22a is unknown. Here we show that Rab14 and Rab22a colocalize in endosomes of both unpolarized and polarized MDCK cells and Rab22a localizes to the cell:cell interface of polarizing cell pairs. Knockdown of Rab22a results in a multi-lumen phenotype in three-dimensional culture. Further, overexpression of Rab22a in Rab14 knockdown cells rescues the multi-lumen phenotype observed with Rab14 knockdown, suggesting that Rab22a is downstream of Rab14. Because of the relationship between Rab14 and Arf6, we investigated the effect of Rab22a knockdown on Arf6. We find that Rab22a knockdown results in decreased active Arf6 and that Rab22a co-immunoprecipitates with the Arf6 GEF EFA6. In addition, EFA6 is retained in intracellular puncta in Rab22a KD cells. These results suggest that Rab22a acts downstream of Rab14 to traffic EFA6 to the AMIS to regulate Arf6 in the establishment of polarity.
Collapse
Affiliation(s)
- Isabella R Blum
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
| | | | | | - Samina Momtaz
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
| | - Christopher Cox
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
| | - Jean M Wilson
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
| |
Collapse
|
9
|
Vaidžiulytė K, Coppey M, Schauer K. Intracellular organization in cell polarity - placing organelles into the polarity loop. J Cell Sci 2019; 132:132/24/jcs230995. [PMID: 31836687 DOI: 10.1242/jcs.230995] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Many studies have investigated the processes that support polarity establishment and maintenance in cells. On the one hand, polarity complexes at the cell cortex and their downstream signaling pathways have been assigned as major regulators of polarity. On the other hand, intracellular organelles and their polarized trafficking routes have emerged as important components of polarity. In this Review, we argue that rather than trying to identify the prime 'culprit', now it is time to consider all these players as a collective. We highlight that understanding the intimate coordination between the polarized cell cortex and the intracellular compass that is defined by organelle positioning is essential to capture the concept of polarity. After briefly reviewing how polarity emerges from a dynamic maintenance of cellular asymmetries, we highlight how intracellular organelles and their associated trafficking routes provide diverse feedback for dynamic cell polarity maintenance. We argue that the asymmetric organelle compass is an indispensable element of the polarity network.
Collapse
Affiliation(s)
- Kotryna Vaidžiulytė
- Cell Biology and Cancer Unit, Institut Curie, PSL Research University, Sorbonne Université, CNRS, Paris 75005, France.,Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS, Paris 75005, France.,Faculty of Science and Engineering, Sorbonne Université, Paris 75005, France
| | - Mathieu Coppey
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, Sorbonne Université, CNRS, Paris 75005, France
| | - Kristine Schauer
- Cell Biology and Cancer Unit, Institut Curie, PSL Research University, Sorbonne Université, CNRS, Paris 75005, France
| |
Collapse
|
10
|
Young JM, Zine El Abidine A, Gómez-Martinez RA, Ozbun MA. The Known and Potential Intersections of Rab-GTPases in Human Papillomavirus Infections. Front Cell Dev Biol 2019; 7:139. [PMID: 31475144 PMCID: PMC6702953 DOI: 10.3389/fcell.2019.00139] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 07/09/2019] [Indexed: 12/16/2022] Open
Abstract
Papillomaviruses (PVs) were the first viruses recognized to cause tumors and cancers in mammalian hosts by Shope, nearly a century ago (Shope and Hurst, 1933). Over 40 years ago, zur Hausen (1976) first proposed that human papillomaviruses (HPVs) played a role in cervical cancer; in 2008, he shared the Nobel Prize in Medicine for his abundant contributions demonstrating the etiology of HPVs in genital cancers. Despite effective vaccines and screening, HPV infection and morbidity remain a significant worldwide burden, with HPV infections and HPV-related cancers expected increase through 2040. Although HPVs have long-recognized roles in tumorigenesis and cancers, our understanding of the molecular mechanisms by which these viruses interact with cells and usurp cellular processes to initiate infections and produce progeny virions is limited. This is due to longstanding challenges in both obtaining well-characterized infectious virus stocks and modeling tissue-based infection and the replicative cycles in vitro. In the last 20 years, the development of methods to produce virus-like particles (VLPs) and pseudovirions (PsV) along with more physiologically relevant cell- and tissue-based models has facilitated progress in this area. However, many questions regarding HPV infection remain difficult to address experimentally and are, thus, unanswered. Although an obligatory cellular uptake receptor has yet to be identified for any PV species, Rab-GTPases contribute to HPV uptake and transport of viral genomes toward the nucleus. Here, we provide a general overview of the current HPV infection paradigm, the epithelial differentiation-dependent HPV replicative cycle, and review the specifics of how HPVs usurp Rab-related functions during infectious entry. We also suggest other potential interactions based on how HPVs alter cellular activities to complete their replicative-cycle in differentiating epithelium. Understanding how HPVs interface with Rab functions during their complex replicative cycle may provide insight for the development of therapeutic interventions, as current viral counter-measures are solely prophylactic and therapies for HPV-positive individuals remain archaic and limited.
Collapse
Affiliation(s)
- Jesse M. Young
- Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
| | - Amira Zine El Abidine
- Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
| | - Ricardo A. Gómez-Martinez
- Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
- Department of Obstetrics & Gynecology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
| | - Michelle A. Ozbun
- Department of Molecular Genetics and Microbiology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
- Department of Obstetrics & Gynecology, University of New Mexico School of Medicine, UNM Comprehensive Cancer Center, Albuquerque, NM, United States
| |
Collapse
|
11
|
Affiliation(s)
- Jean Claude Hervé
- a INSERM U1082, Université de Poitiers, CHU Poitiers , Poitiers , France
| | - Nicolas Bourmeyster
- b Laboratoire Signalisation et Transports Ioniques Membranaires (STIM) , ERL CNRS 7368, Université de Poitiers, Pôle Biologie Santé , Bâtiment B36, 1 rue Georges Bonnet, Poitiers Cédex , France
| |
Collapse
|