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Melnyk S, Bollag WB. Aquaporins in the Cornea. Int J Mol Sci 2024; 25:3748. [PMID: 38612559 PMCID: PMC11011575 DOI: 10.3390/ijms25073748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/18/2024] [Accepted: 03/21/2024] [Indexed: 04/14/2024] Open
Abstract
The cornea is an avascular, transparent tissue that allows light to enter the visual system. Accurate vision requires proper maintenance of the cornea's integrity and structure. Due to its exposure to the external environment, the cornea is prone to injury and must undergo proper wound healing to restore vision. Aquaporins (AQPs) are a family of water channels important for passive water transport and, in some family members, the transport of other small molecules; AQPs are expressed in all layers of the cornea. Although their functions as water channels are well established, the direct function of AQPs in the cornea is still being determined and is the focus of this review. AQPs, primarily AQP1, AQP3, and AQP5, have been found to play an important role in maintaining water homeostasis, the corneal structure in relation to proper hydration, and stress responses, as well as wound healing in all layers of the cornea. Due to their many functions in the cornea, the identification of drug targets that modulate the expression of AQPs in the cornea could be beneficial to promote corneal wound healing and restore proper function of this tissue crucial for vision.
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Affiliation(s)
- Samuel Melnyk
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
| | - Wendy B. Bollag
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA;
- Charlie Norwood Department of Veterans Affairs Medical Center, Augusta, GA 30904, USA
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Stellmach H, Hose R, Räde A, Marillonnet S, Hause B. A New Set of Golden-Gate-Based Organelle Marker Plasmids for Colocalization Studies in Plants. PLANTS (BASEL, SWITZERLAND) 2022; 11:2620. [PMID: 36235483 PMCID: PMC9572143 DOI: 10.3390/plants11192620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/30/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
In vivo localization of proteins using fluorescence-based approaches by fusion of the protein of interest (POI) to a fluorescent protein is a cost- and time-effective tool to gain insights into its physiological function in a plant cell. Determining the proper localization, however, requires the co-expression of defined organelle markers (OM). Several marker sets are available but, so far, the procedure requires successful co-transformation of POI and OM into the same cell and/or several cloning steps. We developed a set of vectors containing markers for basic cell organelles that enables the insertion of the gene of interest (GOI) by a single cloning step using the Golden Gate cloning approach and resulting in POI-GFP fusions. The set includes markers for plasma membrane, tonoplast, nucleus, endoplasmic reticulum, Golgi apparatus, peroxisomes, plastids, and mitochondria, all labelled with mCherry. Most of them were derived from well-established marker sets, but those localized in plasma membrane and tonoplast were improved by using different proteins. The final vectors are usable for localization studies in isolated protoplasts and for transient transformation of leaves of Nicotiana benthamiana. Their functionality is demonstrated using two enzymes involved in biosynthesis of jasmonic acid and located in either plastids or peroxisomes.
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Charlestin V, Fulkerson D, Arias Matus CE, Walker ZT, Carthy K, Littlepage LE. Aquaporins: New players in breast cancer progression and treatment response. Front Oncol 2022; 12:988119. [PMID: 36212456 PMCID: PMC9532844 DOI: 10.3389/fonc.2022.988119] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/09/2022] [Indexed: 11/30/2022] Open
Abstract
Aquaporins (AQPs) are a family of small transmembrane proteins that selectively transport water and other small molecules and ions following an osmotic gradient across cell plasma membranes. This enables them to regulate numerous functions including water homeostasis, fat metabolism, proliferation, migration, and adhesion. Previous structural and functional studies highlight a strong biological relationship between AQP protein expression, localization, and key biological functions in normal and cancer tissues, where aberrant AQP expression correlates with tumorigenesis and metastasis. In this review, we discuss the roles of AQP1, AQP3, AQP4, AQP5, and AQP7 in breast cancer progression and metastasis, including the role of AQPs in the tumor microenvironment, to highlight potential contributions of stromal-derived to epithelial-derived AQPs to breast cancer. Emerging evidence identifies AQPs as predictors of response to cancer therapy and as targets for increasing their sensitivity to treatment. However, these studies have not evaluated the requirements for protein structure on AQP function within the context of breast cancer. We also examine how AQPs contribute to a patient's response to cancer treatment, existing AQP inhibitors and how AQPs could serve as novel predictive biomarkers of therapy response in breast cancer. Future studies also should evaluate AQP redundancy and compensation as mechanisms used to overcome aberrant AQP function. This review highlights the need for additional research into how AQPs contribute molecularly to therapeutic resistance and by altering the tumor microenvironment.
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Affiliation(s)
- Verodia Charlestin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
| | - Daniel Fulkerson
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
| | - Carlos E. Arias Matus
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
- Department of Biotechnology, Universidad Popular Autónoma del Estado de Puebla, Pue, Mexico
| | - Zachary T. Walker
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
| | - Kevin Carthy
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
| | - Laurie E. Littlepage
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, United States
- Harper Cancer Research Institute, University of Notre Dame, South Bend, IN, United States
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Teng GC, Boo MV, Lam SH, Pang CZ, Chew SF, Ip YK. Molecular characterization and light-dependent expression of glycerol facilitator (GlpF) in coccoid Symbiodiniaceae dinoflagellates of the giant clam Tridacna squamosa. GENE REPORTS 2022. [DOI: 10.1016/j.genrep.2022.101623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jang DG, Kwon KY, Song EK, Park TJ. Integrin β-like 1 protein (ITGBL1) promotes cell migration by preferentially inhibiting integrin-ECM binding at the trailing edge. Genes Genomics 2022; 44:405-413. [PMID: 35066808 PMCID: PMC8921176 DOI: 10.1007/s13258-021-01204-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 12/06/2021] [Indexed: 11/30/2022]
Abstract
Background Cell migration is a basic cellular behavior involved in multiple phenomena in the human body such as embryonic development, wound healing, immune reactions, and cancer metastasis. For proper cell migration, integrin and the ECM binding complex must be disassembled for the retraction of trailing edges. Objective Integrin must be differentially regulated at leading edges or trailing edges during cell migration. Previously, we showed that ITGBL1 was a secreted protein and inhibits integrin activity. Therefore, we examined the function of ITGBL1 on the retraction of trailing edges during cell migration. Methods To examined the function of ITGBL1 on cell migration, we knocked-down or overexpressed ITGBL1 by using ITGBL1 siRNA or ITGBL1 plasmid DNA in human chondrocytes or ATDC5 cells. We then characterized cellular migration and directionality by performing wound healing assays. Also, to analyze leading-edge formation and trailing-edge retraction, we labeled cell membranes with membrane-GFP and performed live imaging of migrating cells and. Finally, we specifically detected active forms of integrin, FAK and Vinculin using specific antibodies upon ITGBL1 depletion or overexpression. Result In this study, ITGBL1 preferentially inhibited integrin activity at the trailing edges to promote cell migration. ITGBL1-depleted cells showed increased focal adhesions at the membranous traces of trailing edges to prevent the retraction of trailing edges. In contrast, overexpression of ITGBL1 upregulated directional cell migration by promoting focal adhesion disassembly at the trailing edges. Conclusion ITGBL1 facilitates directional cell migration by promoting disassembly of the trailing edge focal adhesion complex. Supplementary Information The online version contains supplementary material available at 10.1007/s13258-021-01204-x.
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Affiliation(s)
- Dong Gil Jang
- Department of Biological Sciences, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea
| | - Keun Yeong Kwon
- Department of Biological Sciences, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea
| | - Eun Kyung Song
- School of Medicine, Stanford University, Palo Alto, CA, 94305, USA.
| | - Tae Joo Park
- Department of Biological Sciences, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
- Center for Genomic Integrity, Institute for Basic Science, Ulsan, 44919, Republic of Korea.
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Sabir F, Zarrouk O, Noronha H, Loureiro-Dias MC, Soveral G, Gerós H, Prista C. Grapevine aquaporins: Diversity, cellular functions, and ecophysiological perspectives. Biochimie 2021; 188:61-76. [PMID: 34139292 DOI: 10.1016/j.biochi.2021.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/23/2021] [Accepted: 06/07/2021] [Indexed: 11/30/2022]
Abstract
High-scored premium wines are typically produced under moderate drought stress, suggesting that the water status of grapevine is crucial for wine quality. Aquaporins greatly influence the plant water status by facilitating water diffusion across the plasma membrane in a tightly regulated manner. They adjust the hydraulic conductance of the plasma membrane rapidly and reversibly, which is essential in specific physiological events, including adaptation to soil water scarcity. The comprehension of the sophisticated plant-water relations at the molecular level are thus important to optimize agricultural practices or to assist plant breeding programs. This review explores the recent progresses in understanding the water transport in grapevine at the cellular level through aquaporins and its regulation. Important aspects, including aquaporin structure, diversity, cellular localization, transport properties, and regulation at the cellular and whole plant level are addressed. An ecophysiological perspective about the roles of grapevine aquaporins in plant response to drought stress is also provided.
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Affiliation(s)
- Farzana Sabir
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal; Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisbon, Portugal.
| | - Olfa Zarrouk
- Association SFCOLAB - Collaborative Laboratory for Digital Innovation in Agriculture, Rua Cândido dos Reis nº1, Espaço SFCOLAB, 2560-312, Torres Vedras, Portugal
| | - Henrique Noronha
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, 4710-057, Braga, Portugal; Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal
| | - Maria C Loureiro-Dias
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - Graça Soveral
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003, Lisbon, Portugal
| | - Hernâni Gerós
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, 4710-057, Braga, Portugal; Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, 5001-801, Vila Real, Portugal; Centre of Biological Engineering (CEB), Department of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Catarina Prista
- Linking Landscape, Environment, Agriculture and Food (LEAF), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal; Departamento de Recursos Biologicos, Ambiente e Territorio (DRAT), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
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Kumawat S, Khatri P, Ahmed A, Vats S, Kumar V, Jaswal R, Wang Y, Xu P, Mandlik R, Shivaraj SM, Deokar A, Sonah H, Sharma TR, Deshmukh R. Understanding aquaporin transport system, silicon and other metalloids uptake and deposition in bottle gourd (Lagenaria siceraria). JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124598. [PMID: 33234398 DOI: 10.1016/j.jhazmat.2020.124598] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 11/01/2020] [Accepted: 11/13/2020] [Indexed: 06/11/2023]
Abstract
Aquaporins (AQPs) facilitates the transport of small solutes like water, urea, carbon dioxide, boron, and silicon (Si) and plays a critical role in important physiological processes. In this study, genome-wide characterization of AQPs was performed in bottle gourd. A total of 36 AQPs were identified in the bottle gourd, which were subsequently analyzed to understand the pore-morphology, exon-intron structure, subcellular-localization. In addition, available transcriptome data was used to study the tissue-specific expression. Several AQPs showed tissue-specific expression, more notably the LsiTIP3-1 having a high level of expression in flowers and fruits. Based on the in-silico prediction of solute specificity, LsiNIP2-1 was predicted to be a Si transporter. Silicon was quantified in different tissues, including root, young leaves, mature leaves, tendrils, and fruits of bottle gourd plants. More than 1.3% Si (d.w.) was observed in bottle gourd leaves, testified the in-silico predictions. Silicon deposition evaluated with an energy-dispersive X-ray coupled with a scanning electron microscope showed a high Si accumulation in the shaft of leaf trichomes. Similarly, co-localization of Si with arsenic and antimony was observed. Expression profiling performed with real-time quantitative PCR showed differential expression of AQPs in response to Si supplementation. The information provided in the present study will be helpful to better understand the AQP transport mechanism, particularly Si and other metalloids transport and localization in plants.
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Affiliation(s)
- Surbhi Kumawat
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - Praveen Khatri
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Ashique Ahmed
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India; Darrang College, Tezpur, Sonitpur, Assam, India
| | - Sanskriti Vats
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Virender Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Rajdeep Jaswal
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Ying Wang
- Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Pei Xu
- College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Rushil Mandlik
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - S M Shivaraj
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Amit Deokar
- Department of Plant Sciences, Crop Development Centre, University of Saskatchewan, Saskatoon, Canada
| | - Humira Sonah
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
| | - Tilak Raj Sharma
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India; Division of Crop Science, Indian Council of Agricultural Research, New Delhi, India
| | - Rupesh Deshmukh
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India.
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Kurowska MM. Aquaporins in Cereals-Important Players in Maintaining Cell Homeostasis under Abiotic Stress. Genes (Basel) 2021; 12:genes12040477. [PMID: 33806192 PMCID: PMC8066221 DOI: 10.3390/genes12040477] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 12/27/2022] Open
Abstract
Cereal productivity is reduced by environmental stresses such as drought, heat, elevated CO2, salinity, metal toxicity and cold. Sometimes, plants are exposed to multiple stresses simultaneously. Plants must be able to make a rapid and adequate response to these environmental stimuli in order to restore their growing ability. The latest research has shown that aquaporins are important players in maintaining cell homeostasis under abiotic stress. Aquaporins are membrane intrinsic proteins (MIP) that form pores in the cellular membranes, which facilitate the movement of water and many other molecules such as ammonia, urea, CO2, micronutrients (silicon and boron), glycerol and reactive oxygen species (hydrogen peroxide) across the cell and intercellular compartments. The present review primarily focuses on the diversity of aquaporins in cereal species, their cellular and subcellular localisation, their expression and their functioning under abiotic stresses. Lastly, this review discusses the potential use of mutants and plants that overexpress the aquaporin-encoding genes to improve their tolerance to abiotic stress.
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Affiliation(s)
- Marzena Małgorzata Kurowska
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Jagiellońska 28, 40-032 Katowice, Poland
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C1GALT1 high expression is associated with poor survival of patients with pancreatic ductal adenocarcinoma and promotes cell invasiveness through integrin α v. Oncogene 2021; 40:1242-1254. [PMID: 33420364 PMCID: PMC7892338 DOI: 10.1038/s41388-020-01594-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 11/19/2020] [Accepted: 11/30/2020] [Indexed: 12/30/2022]
Abstract
Pancreatic adenocarcinoma (PDAC) is a leading cause of cancer-related death. Altered glycosylation contributes to tumor progression and chemoresistance in many cancers. C1GALT1 is the key enzyme controlling the elongation of GalNAc-type O-glycosylation. Here we showed that C1GALT1 was overexpressed in 85% (107/126) of PDAC tumors compared with adjacent non-tumor tissues. High expression of C1GALT1 was associated with poor disease-free and overall survival (n = 99). C1GALT1 knockdown using siRNA suppressed cell viability, migration, and invasion as well as increased gemcitabine sensitivity in PDAC cells. In contrast, C1GALT1 overexpression enhanced cell migration and invasion. In subcutaneous and pancreatic orthotopic injection models, C1GALT1 knockdown decreased tumor growth and metastasis of PDAC cells in NOD/SCID mice. Mechanistically, C1GALT1 knockdown dramatically suppressed cell-extracellular matrix (ECM) adhesion, which was associated with decreased phosphorylation of FAK at Y397/Y925 and changes in O-glycans on integrins including the β1, αv, and α5 subunits. Using functional blocking antibodies, we identified integrin αv as a critical factor in C1GALT1-mediated invasiveness of PDAC cells. In conclusion, this study not only reveals that C1GALT1 could be a potential therapeutic target for PDAC but also provides novel insights into the role of O-glycosylation in the α subunits of integrins.
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Singh S, Bhatt V, Kumar V, Kumawat S, Khatri P, Singla P, Shivaraj S, Nadaf A, Deshmukh R, Sharma TR, Sonah H. Evolutionary Understanding of Aquaporin Transport System in the Basal Eudicot Model Species Aquilegia coerulea. PLANTS 2020; 9:plants9060799. [PMID: 32604788 PMCID: PMC7355465 DOI: 10.3390/plants9060799] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 06/07/2020] [Accepted: 06/22/2020] [Indexed: 01/02/2023]
Abstract
Aquaporins (AQPs) play a pivotal role in the cellular transport of water and many other small solutes, influencing many physiological and developmental processes in plants. In the present study, extensive bioinformatics analysis of AQPs was performed in Aquilegia coerulea L., a model species belonging to basal eudicots, with a particular focus on understanding the AQPs role in the developing petal nectar spur. A total of 29 AQPs were identified in Aquilegia, and their phylogenetic analysis performed with previously reported AQPs from rice, poplar and Arabidopsis depicted five distinct subfamilies of AQPs. Interestingly, comparative analysis revealed the loss of an uncharacterized intrinsic protein II (XIP-II) group in Aquilegia. The absence of the entire XIP subfamily has been reported in several previous studies, however, the loss of a single clade within the XIP family has not been characterized. Furthermore, protein structure analysis of AQPs was performed to understand pore diversity, which is helpful for the prediction of solute specificity. Similarly, an AQP AqcNIP2-1 was identified in Aquilegia, predicted as a silicon influx transporter based on the presence of features such as the G-S-G-R aromatic arginine selectivity filter, the spacing between asparagine-proline-alanine (NPA) motifs and pore morphology. RNA-seq analysis showed a high expression of tonoplast intrinsic proteins (TIPs) and plasma membrane intrinsic proteins (PIPs) in the developing petal spur. The results presented here will be helpful in understanding the AQP evolution in Aquilegia and their expression regulation, particularly during floral development.
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Affiliation(s)
- Shweta Singh
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Vacha Bhatt
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra 411007, India; (V.B.); (A.N.)
| | - Virender Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Surbhi Kumawat
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Department of Biotechnology, Panjab University, Chandigarh 160014, India
| | - Praveen Khatri
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Pankaj Singla
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - S.M. Shivaraj
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Altaf Nadaf
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra 411007, India; (V.B.); (A.N.)
| | - Rupesh Deshmukh
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
| | - Tilak Raj Sharma
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Division of Crop Science, Indian Council of Agricultural Research, Krishi Bhavan, New Delhi 110001, India
- Correspondence: (T.R.S.); (H.S.); Tel.: +91-172-522-1181 (H.S.)
| | - Humira Sonah
- National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India; (S.S.); (V.K.); (S.K.); (P.K.); (P.S.); (S.M.S.); (R.D.)
- Correspondence: (T.R.S.); (H.S.); Tel.: +91-172-522-1181 (H.S.)
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Zhang Y, Xu B, Shi J, Li J, Lu X, Xu L, Yang H, Hamad N, Wang C, Napier D, He S, Liu C, Liu Z, Qian H, Chen L, Wei X, Zheng X, Huang JA, Thibault O, Craven R, Wei D, Pan Y, Zhou BP, Wu Y, Yang XH. BRD4 modulates vulnerability of triple-negative breast cancer to targeting of integrin-dependent signaling pathways. Cell Oncol (Dordr) 2020; 43:1049-1066. [PMID: 33006750 PMCID: PMC7716866 DOI: 10.1007/s13402-020-00537-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/22/2020] [Indexed: 12/30/2022] Open
Abstract
PURPOSE Stemming from a myriad of genetic and epigenetic alterations, triple-negative breast cancer (TNBC) is tied to poor clinical outcomes and aspires for individualized therapies. Here we investigated the therapeutic potential of co-inhibiting integrin-dependent signaling pathway and BRD4, a transcriptional and epigenetic mediator, for TNBC. METHODS Two independent patient cohorts were subjected to bioinformatic and IHC examination for clinical association of candidate cancer drivers. The efficacy and biological bases for co-targeting these drivers were interrogated using cancer cell lines, a protein kinase array, chemical inhibitors, RNAi/CRISPR/Cas9 approaches, and a 4 T1-Balb/c xenograft model. RESULTS We found that amplification of the chromosome 8q24 region occurred in nearly 20% of TNBC tumors, and that it coincided with co-upregulation or amplification of c-Myc and FAK, a key effector of integrin-dependent signaling. This co-upregulation at the mRNA or protein level correlated with a poor patient survival (p < 0.0109 or p < 0.0402, respectively). Furthermore, we found that 14 TNBC cell lines exhibited high vulnerabilities to the combination of JQ1 and VS-6063, potent pharmacological antagonists of the BRD4/c-Myc and integrin/FAK-dependent pathways, respectively. We also observed a cooperative inhibitory effect of JQ1 and VS-6063 on tumor growth and infiltration of Ly6G+ myeloid-derived suppressor cells in vivo. Finally, we found that JQ1 and VS-6063 cooperatively induced apoptotic cell death by altering XIAP, Bcl2/Bcl-xl and Bim levels, impairing c-Src/p130Cas-, PI3K/Akt- and RelA-associated signaling, and were linked to EMT-inducing transcription factor Snail- and Slug-dependent regulation. CONCLUSION Based on our results, we conclude that the BRD4/c-Myc- and integrin/FAK-dependent pathways act in concert to promote breast cancer cell survival and poor clinical outcomes. As such, they represent promising targets for a synthetic lethal-type of therapy against TNBC.
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Affiliation(s)
- Yang Zhang
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
- Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Bingwei Xu
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Junfeng Shi
- Department of Oncology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China
| | - Jieming Li
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
- Center of Drug Discovery, China Pharmaceutical University, Nanjing, Jiangsu Province, People's Republic of China
| | - Xinlan Lu
- Department of Medical Oncology, the First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shanxi Province, People's Republic of China
| | - Li Xu
- Department of Statistics, University of Kentucky, Lexington, KY, USA
| | - Helen Yang
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Nevean Hamad
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Chi Wang
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Dana Napier
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Shuixiang He
- Department of Medical Oncology, the First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shanxi Province, People's Republic of China
| | - Chunming Liu
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Zeyi Liu
- Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Hai Qian
- Center of Drug Discovery, China Pharmaceutical University, Nanjing, Jiangsu Province, People's Republic of China
| | - Li Chen
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Xiaowei Wei
- Department of Oncology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China
| | - Xucai Zheng
- The First Affiliated Hospital of University of Science & Technology of China and Provincial Hospital, Hefei, Anhui Province, People's Republic of China
| | - Jian-An Huang
- Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, People's Republic of China
| | - Olivier Thibault
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Rolf Craven
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Dongping Wei
- Department of Oncology, Nanjing Medical University, Nanjing, Jiangsu Province, People's Republic of China.
| | - Yueyin Pan
- The First Affiliated Hospital of University of Science & Technology of China and Provincial Hospital, Hefei, Anhui Province, People's Republic of China.
| | - Binhua P Zhou
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA.
| | - Yadi Wu
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA.
| | - Xiuwei H Yang
- Department of Pharmacology and Nutritional Sciences, Department of Molecular and Cellular Biochemistry, and Markey Cancer Center, College of Medicine, University of Kentucky, Lexington, KY, USA.
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12
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Kurowska MM, Wiecha K, Gajek K, Szarejko I. Drought stress and re-watering affect the abundance of TIP aquaporin transcripts in barley. PLoS One 2019; 14:e0226423. [PMID: 31846477 PMCID: PMC6917287 DOI: 10.1371/journal.pone.0226423] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/26/2019] [Indexed: 11/30/2022] Open
Abstract
Tonoplast Intrinsic Proteins (TIP) are plant aquaporins that are primarily localized in the tonoplast and play a role in the bidirectional flux of water and other substrates across a membrane. In barley, eleven members of the HvTIP gene subfamily have been identified. Here, we describe the transcription profile of the HvTIP genes in the leaves of barley seedlings being grown under optimal moisture conditions, drought stress and a re-watering phase. The applied drought stress caused a 55% decrease in the relative water content (RWC) in seedlings, while re-watering increased the RWC to 90% of the control. Our analysis showed that all HvTIP genes, except HvTIP3;2, HvTIP4;3 and HvTIP5.1, were expressed in leaves of ten-day-old barley seedlings under optimal water conditions with the transcripts of HvTIP2;3, HvTIP1;2 and HvTIP1;1 being the most abundant. We showed, for the first time in barley, a significant variation in the transcriptional activity between the analysed genes under drought stress. After drought treatment, five HvTIP genes, which are engaged in water transport, were down-regulated to varying degrees, while two, HvTIP3;1 and HvTIP4;1, were up-regulated. The HvTIP3;1 isoform, which is postulated as transporting hydrogen peroxide, expressed the highest increase of activity (ca. 5000x) under drought stress, thus indicating its importance in the response to this stress. Re-hydration caused the return of the expression of many genes to the level that was observed under optimal moisture conditions or, at least, a change in this direction Additionally, we examined the promotor regions of HvTIP and detected the presence of the cis-regulatory elements that are connected with the hormone and stress responses in all of the genes. Overall, our results suggest that 7 of 11 studied HvTIP (HvTIP1;1, HvTIP1;2, HvTIP2;1, HvTIP2;2, HvTIP2;3, HvTIP3;1, HvTIP4;1) have an important function during the adaptation of barley to drought stress conditions. We discuss the identified drought-responsive HvTIP in terms of their function in the adaptation of barley to this stress.
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Affiliation(s)
- Marzena Małgorzata Kurowska
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
- * E-mail:
| | - Klaudia Wiecha
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Katarzyna Gajek
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Iwona Szarejko
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
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13
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Bezerra-Neto JP, de Araújo FC, Ferreira-Neto JRC, da Silva MD, Pandolfi V, Aburjaile FF, Sakamoto T, de Oliveira Silva RL, Kido EA, Barbosa Amorim LL, Ortega JM, Benko-Iseppon AM. Plant Aquaporins: Diversity, Evolution and Biotechnological Applications. Curr Protein Pept Sci 2019; 20:368-395. [PMID: 30387391 DOI: 10.2174/1389203720666181102095910] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 10/24/2018] [Accepted: 10/30/2018] [Indexed: 12/20/2022]
Abstract
The plasma membrane forms a permeable barrier that separates the cytoplasm from the external environment, defining the physical and chemical limits in each cell in all organisms. The movement of molecules and ions into and out of cells is controlled by the plasma membrane as a critical process for cell stability and survival, maintaining essential differences between the composition of the extracellular fluid and the cytosol. In this process aquaporins (AQPs) figure as important actors, comprising highly conserved membrane proteins that carry water, glycerol and other hydrophilic molecules through biomembranes, including the cell wall and membranes of cytoplasmic organelles. While mammals have 15 types of AQPs described so far (displaying 18 paralogs), a single plant species can present more than 120 isoforms, providing transport of different types of solutes. Such aquaporins may be present in the whole plant or can be associated with different tissues or situations, including biotic and especially abiotic stresses, such as drought, salinity or tolerance to soils rich in heavy metals, for instance. The present review addresses several aspects of plant aquaporins, from their structure, classification, and function, to in silico methodologies for their analysis and identification in transcriptomes and genomes. Aspects of evolution and diversification of AQPs (with a focus on plants) are approached for the first time with the aid of the LCA (Last Common Ancestor) analysis. Finally, the main practical applications involving the use of AQPs are discussed, including patents and future perspectives involving this important protein family.
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Affiliation(s)
- João P Bezerra-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flávia Czekalski de Araújo
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - José R C Ferreira-Neto
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Manassés D da Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Valesca Pandolfi
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Flavia F Aburjaile
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Tetsu Sakamoto
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Roberta L de Oliveira Silva
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Ederson A Kido
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
| | - Lidiane L Barbosa Amorim
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil.,Instituto Federal de Educação, Ciência e Tecnologia do Piauí, Campus Oeiras, Avenida Projetada, s/n, 64.500-000, Oeiras, Piauí, Brazil
| | - José M Ortega
- Universidade Federal de Minas Gerais, Department of Biochemistry and Immunology, Belo Horizonte, Brazil
| | - Ana M Benko-Iseppon
- Universidade Federal de Pernambuco, Genetics Department, Center of Biosciences, Av. Prof. Moraes Rego, 1235, 50.670-423, Recife, Pernambuco, Brazil
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14
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The Expanding Role of Vesicles Containing Aquaporins. Cells 2018; 7:cells7100179. [PMID: 30360436 PMCID: PMC6210599 DOI: 10.3390/cells7100179] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/16/2018] [Accepted: 10/20/2018] [Indexed: 12/11/2022] Open
Abstract
In animals and plants, membrane vesicles containing proteins have been defined as key for biological systems involving different processes such as trafficking or intercellular communication. Docking and fusion of vesicles to the plasma membrane occur in living cells in response to different stimuli, such as environmental changes or hormones, and therefore play an important role in cell homeostasis as vehicles for certain proteins or other substances. Because aquaporins enhance the water permeability of membranes, their role as proteins immersed in vesicles formed of natural membranes is a recent topic of study. They regulate numerous physiological processes and could hence serve new biotechnological purposes. Thus, in this review, we have explored the physiological implications of the trafficking of aquaporins, the mechanisms that control their transit, and the proteins that coregulate the migration. In addition, the importance of exosomes containing aquaporins in the cell-to-cell communication processes in animals and plants have been analyzed, together with their potential uses in biomedicine or biotechnology. The properties of aquaporins make them suitable for use as biomarkers of different aquaporin-related diseases when they are included in exosomes. Finally, the fact that these proteins could be immersed in biomimetic membranes opens future perspectives for new biotechnological applications.
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15
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Fadaei Naeini V, Foroutan M, Maddah M, Rémond Y, Baniassadi M. Determinative factors in inhibition of aquaporin by different pharmaceuticals: Atomic scale overview by molecular dynamics simulation. Biochim Biophys Acta Gen Subj 2018; 1862:2815-2823. [PMID: 30251670 DOI: 10.1016/j.bbagen.2018.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 08/28/2018] [Accepted: 09/03/2018] [Indexed: 11/17/2022]
Abstract
The inhibition of water permeation through aquaporins by ligands of pharmaceutical compounds is considered as a method to control the cell lifetime. The inhibition of aquaporin 1 (AQP1) by bacopaside-I and torsemide, was explored and its atomistic nature was elucidated by molecular docking and molecular dynamics (MD) simulation collectively along with Poisson-Boltzmann surface area (PBSA) method. Docking results revealed that torsemide has a lower level of docking energy in comparison with bacopaside-I at the cytoplasmic side. Furthermore, the effect of steric constraints on water permeation was accentuated. Bacopaside-I inhibits the channel properly due to the strong interaction with the channel and larger spatial volume, whereas torsemide blocks the cytoplasmic side of the channel imperfectly. The most probable active sites of AQP1 for the formation of hydrogen bonds between the inhibitor and the channel were identified by numerical analysis of the bonds. Eventually, free energy assessments indicate that binding of both inhibitors is favorable in complex with AQP1, and van der Waals interaction has an important contribution in stabilizing the complexes.
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Affiliation(s)
- Vahid Fadaei Naeini
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Masumeh Foroutan
- Department of Physical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mina Maddah
- Department of Physical Chemistry, School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Yves Rémond
- University of Strasbourg, ICube laboratory/CNRS, 2 Rue Boussingault, 67000 Strasbourg, France
| | - Majid Baniassadi
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran; University of Strasbourg, ICube laboratory/CNRS, 2 Rue Boussingault, 67000 Strasbourg, France.
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16
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Chen G, Zhang Z, Shang R, Qi J, Zhang Y, Tang S, Shen Z. In vitro expression and functional characterization of NPA motifs in aquaporins of Nosema bombycis. Parasitol Res 2018; 117:3473-3479. [PMID: 30105406 DOI: 10.1007/s00436-018-6044-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 08/03/2018] [Indexed: 12/11/2022]
Abstract
Nosema bombycis contains functional aquaporins (NbAQPs), which are key targets for exploring the mechanism of N. bombycis infection; however, the regulation of these NbAQPs remains unknown. The two highly conserved asparagine-proline-alanine sequences (NPA motifs) play important roles in AQP biogenesis. As part of this study, we constructed a series of NbAQP mutants (NbAQP_NPA1, NbAQP_NPA2, and NbAQP_NPA1,2) and expressed them in BmN cells. The results showed that mutations in either NPA motif or in both NPA motifs did not affect NbAQP expression in vitro. After expression in Xenopus laevis oocytes, those injected with wild-type NbAQP rapidly expanded, whereas oocytes injected with NbAQP_NPAs did not significantly change in size. The associated water permeability (pf) of NbAQP_NPAs was significantly reduced five-six times compared to that of wild-type NbAQP. These results indicated that NPA motifs are necessary for the water channel function of AQPs in N. bombycis. The present study shows for the first time that the NbAQP NPA motif has an impact on the water permeability of aquaporin in N. bombycis, thereby providing a platform for further research into the mechanisms underlying the regulation of NbAQP expression.
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Affiliation(s)
- Gong Chen
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Zhilin Zhang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Ruisha Shang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Jingru Qi
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China
| | - Yiling Zhang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China.,Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China.,Key Laboratory of Genetic Improvement of Silkworm and Mulberry of Agricultural Ministry, Zhenjiang, 212018, Jiangsu Province, China
| | - Shunming Tang
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China.,Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China.,Key Laboratory of Genetic Improvement of Silkworm and Mulberry of Agricultural Ministry, Zhenjiang, 212018, Jiangsu Province, China
| | - Zhongyuan Shen
- Jiangsu University of Science and Technology, Zhenjiang, 212018, Jiangsu Province, China. .,Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang, 212018, Jiangsu Province, China. .,Key Laboratory of Genetic Improvement of Silkworm and Mulberry of Agricultural Ministry, Zhenjiang, 212018, Jiangsu Province, China.
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17
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Huang D, Feng X, Liu Y, Deng Y, Chen H, Chen D, Fang L, Cai Y, Liu H, Wang L, Wang J, Yang Z. AQP9-induced cell cycle arrest is associated with RAS activation and improves chemotherapy treatment efficacy in colorectal cancer. Cell Death Dis 2017. [PMID: 28640255 PMCID: PMC5520935 DOI: 10.1038/cddis.2017.282] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aquaporin-9 (AQP9) expression is associated with arsenic sensitivity in leukemia cells. However, the role of AQP9 in regulating tumor sensitivity to adjuvant chemotherapy in colorectal cancer (CRC) has not been elucidated. In this study, we demonstrated that AQP9 can serve as an independent predictive marker for adjuvant chemotherapy in CRC. Patients with high AQP9 expression had higher rate of disease-free survival (DFS) than those with low AQP9 expression. Upregulation of AQP9 was associated with enhanced chemosensitivity to 5-fluorouracil (5-FU) both in vitro and in vivo. Overexpression of AQP9 resulted in an increased intracellular level of 5-FU in CRC cells, hence leading to a higher percentage of apoptosis after 5-FU treatment. Moreover, AQP9 is positively associated with RAS activation and other downstream signaling molecules in CRC. AQP9 overexpression resulted in p21 upregulation and induced S-phase arrest. Taken together, AQP9 enhances the cytotoxic response to 5-FU in CRC cells by simultaneously inducing S-phase arrest via activation of RAS signaling and facilitating drug uptake. Our results suggest that AQP9 might be a novel predictor for the benefit of 5-FU-based chemotherapy in CRC. The identification of AQP9-induced tumor sensitivity to 5-FU highlights the role of AQP9 in regulating chemosensitivity in CRC.
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Affiliation(s)
- Dandan Huang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Xingzhi Feng
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Yiting Liu
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Yanhong Deng
- Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China.,Department of Medical Oncology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China
| | - Hao Chen
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Daici Chen
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Lekun Fang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Yue Cai
- Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China.,Department of Medical Oncology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China
| | - Huanliang Liu
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Lei Wang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Jianping Wang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
| | - Zihuan Yang
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510655, China.,Guangdong Institute of Gastroenterology, Guangzhou, Guangdong 510655, China
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18
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Sonah H, Deshmukh RK, Labbé C, Bélanger RR. Analysis of aquaporins in Brassicaceae species reveals high-level of conservation and dynamic role against biotic and abiotic stress in canola. Sci Rep 2017; 7:2771. [PMID: 28584277 PMCID: PMC5459863 DOI: 10.1038/s41598-017-02877-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 04/19/2017] [Indexed: 01/11/2023] Open
Abstract
Aquaporins (AQPs) are of vital importance in the cellular transport system of all living organisms. In this study, genome-wide identification, distribution, and characterization of AQPs were determined in Arabidopsis lyrata, Capsella grandiflora, C. rubella, Eutrema salsugineum, Brassica rapa, B. oleracea, and B. napus (canola). Classification and phylogeny of AQPs revealed the loss of XIPs and NIP-IIIs in all species. Characterization of distinctive AQP features showed a high level of conservation in spacing between NPA-domains, and selectivity filters. Interestingly, TIP3s were found to be highly expressed in developing seeds, suggesting their role in seed desiccation. Analysis of available RNA-seq data obtained under biotic and abiotic stresses led to the identification of AQPs involved in stress tolerance mechanisms in canola. In addition, analysis of the effect of ploidy level, and resulting gene dose effect performed with the different combinations of Brassica A and C genomes revealed that more than 70% of AQPs expression were dose-independent, thereby supporting their role in stress alleviation. This first in-depth characterization of Brassicaceae AQPs highlights transport mechanisms and related physiological processes that could be exploited in breeding programs of stress-tolerant cultivars.
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Affiliation(s)
- Humira Sonah
- Département de phytologie-Faculté des Sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada
| | - Rupesh K Deshmukh
- Département de phytologie-Faculté des Sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada
| | - Caroline Labbé
- Département de phytologie-Faculté des Sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada
| | - Richard R Bélanger
- Département de phytologie-Faculté des Sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada.
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19
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Genome-wide identification, characterization, and expression profile of aquaporin gene family in flax (Linum usitatissimum). Sci Rep 2017; 7:46137. [PMID: 28447607 PMCID: PMC5406838 DOI: 10.1038/srep46137] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 03/13/2017] [Indexed: 01/25/2023] Open
Abstract
Membrane intrinsic proteins (MIPs) form transmembrane channels and facilitate transport of myriad substrates across the cell membrane in many organisms. Majority of plant MIPs have water transporting ability and are commonly referred as aquaporins (AQPs). In the present study, we identified aquaporin coding genes in flax by genome-wide analysis, their structure, function and expression pattern by pan-genome exploration. Cross-genera phylogenetic analysis with known aquaporins from rice, arabidopsis, and poplar showed five subgroups of flax aquaporins representing 16 plasma membrane intrinsic proteins (PIPs), 17 tonoplast intrinsic proteins (TIPs), 13 NOD26-like intrinsic proteins (NIPs), 2 small basic intrinsic proteins (SIPs), and 3 uncharacterized intrinsic proteins (XIPs). Amongst aquaporins, PIPs contained hydrophilic aromatic arginine (ar/R) selective filter but TIP, NIP, SIP and XIP subfamilies mostly contained hydrophobic ar/R selective filter. Analysis of RNA-seq and microarray data revealed high expression of PIPs in multiple tissues, low expression of NIPs, and seed specific expression of TIP3 in flax. Exploration of aquaporin homologs in three closely related Linum species bienne, grandiflorum and leonii revealed presence of 49, 39 and 19 AQPs, respectively. The genome-wide identification of aquaporins, first in flax, provides insight to elucidate their physiological and developmental roles in flax.
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20
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Contreras M, de la Fuente J. Control of infestations by Ixodes ricinus tick larvae in rabbits vaccinated with aquaporin recombinant antigens. Vaccine 2017; 35:1323-1328. [PMID: 28161419 DOI: 10.1016/j.vaccine.2017.01.052] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/10/2017] [Accepted: 01/13/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Tick-borne diseases greatly impact human and animal health worldwide, and vaccines are an environmentally friendly alternative to acaricides for their control. Recent results have suggested that aquaporin (AQP) water channels have a key function during tick feeding and development, and constitute good candidate antigens for the control of tick infestations. METHODS Here we describe the effect of vaccination with the Ixodes ricinus AQP1 (IrAQP) and a tick AQP conserved region (CoAQP) on I. ricinus tick larval mortality, feeding and molting. RESULTS We demonstrated that vaccination with IrAQP and CoAQP had an efficacy of 32% and 80%, respectively on the control of I. ricinus larvae by considering the cumulative effect on reducing tick survival and molting. CONCLUSIONS The effect of the AQP vaccines on larval survival and molting is essential to reduce tick infestations, and extended previous results on the effect of R. microplus AQP1 on the control of cattle tick infestations. These results supports that AQP, and particularly CoAQP, might be a candidate protective antigen for the control of different tick species.
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Affiliation(s)
- Marinela Contreras
- SaBio, Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005 Ciudad Real, Spain
| | - José de la Fuente
- SaBio, Instituto de Investigación en Recursos Cinegéticos IREC-CSIC-UCLM-JCCM, Ronda de Toledo s/n, 13005 Ciudad Real, Spain; Department of Veterinary Pathobiology, Center for Veterinary Health Sciences, Oklahoma State University, Stillwater, OK 74078, USA.
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Das R, Vecitis CD, Schulze A, Cao B, Ismail AF, Lu X, Chen J, Ramakrishna S. Recent advances in nanomaterials for water protection and monitoring. Chem Soc Rev 2017; 46:6946-7020. [DOI: 10.1039/c6cs00921b] [Citation(s) in RCA: 353] [Impact Index Per Article: 50.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nanomaterials (NMs) for adsorption, catalysis, separation, and disinfection are scrutinized. NMs-based sensor technologies and environmental transformations of NMs are highlighted.
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Affiliation(s)
- Rasel Das
- Leibniz Institute of Surface Modification
- D-04318 Leipzig
- Germany
| | - Chad D. Vecitis
- School of Engineering and Applied Sciences
- Harvard University
- Cambridge
- USA
| | - Agnes Schulze
- Leibniz Institute of Surface Modification
- D-04318 Leipzig
- Germany
| | - Bin Cao
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre
- Universiti Teknologi Malaysia
- 81310 Johor
- Malaysia
| | - Xianbo Lu
- CAS Key Laboratory of Separation Science for Analytical Chemistry
- Dalian Institute of Chemical Physics
- Dalian 116023
- China
| | - Jiping Chen
- CAS Key Laboratory of Separation Science for Analytical Chemistry
- Dalian Institute of Chemical Physics
- Dalian 116023
- China
| | - Seeram Ramakrishna
- Centre for Nanofibers and Nanotechnology
- Department of Mechanical Engineering
- National University of Singapore
- Singapore
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22
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Li Z, Wang W, Xu X, Kratz K, Zou J, Lysyakova L, Heuchel M, Kurtz A, Gossen M, Ma N, Lendlein A. Integrin β1 activation by micro-scale curvature promotes pro-angiogenic secretion of human mesenchymal stem cells. J Mater Chem B 2017; 5:7415-7425. [DOI: 10.1039/c7tb01232b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A cell culture substrate with micro-scale surface curvature promotes β1 integrin activation and pro-angiogenic secretion of mesenchymal stem cells.
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23
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Choi CW, Kim YH, Sohn JH, Lee H, Kim WS. Focal adhesion kinase and Src expression in premalignant and malignant skin lesions. Exp Dermatol 2016; 24:361-4. [PMID: 25711159 DOI: 10.1111/exd.12676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2015] [Indexed: 01/09/2023]
Abstract
Focal adhesion kinase (FAK) and Src are non-receptor tyrosine kinases. FAK and Src play a critical role in inducing malignant transformation in tumor cells. We performed immunohistochemical staining for total and phosphorylated forms of FAK and Src, to evaluate the role of FAK and Src in the development of premalignant and malignant skin lesions. A total of 59 facial skin samples (30 actinic keratoses, 10 Bowen's diseases, 13 squamous cell carcinomas and six perilesional skins) were immunohistochemically stained for Ki-67, total (t) and phosphorylated (p) form of FAK and Src. Cells positive for t-Src, p-Src-y530, t-FAK and pFAK-s722 were detected in premalignant intra-epithelial lesions (PELs) and squamous cell carcinomas (SCCs), but not in the perilesional skin. There was a tendency towards high correlation between Ki-67 and t-FAK or pFAK-s722, suggestive of the active role of FAK in cell proliferation. However, our findings of higher t-Src and p-Src-y530 positive cells in PELs, as compared to SCCs (with higher Ki-67 level), are suggestive of the other role of Src in tumor formation and progression, which requires further investigation.
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Affiliation(s)
- Chong Won Choi
- Department of Dermatology, Kangbuk Samsung Hospital, Seoul, Korea
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24
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Handorf AM, Zhou Y, Halanski MA, Li WJ. Tissue stiffness dictates development, homeostasis, and disease progression. Organogenesis 2016; 11:1-15. [PMID: 25915734 DOI: 10.1080/15476278.2015.1019687] [Citation(s) in RCA: 385] [Impact Index Per Article: 48.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Tissue development is orchestrated by the coordinated activities of both chemical and physical regulators. While much attention has been given to the role that chemical regulators play in driving development, researchers have recently begun to elucidate the important role that the mechanical properties of the extracellular environment play. For instance, the stiffness of the extracellular environment has a role in orienting cell division, maintaining tissue boundaries, directing cell migration, and driving differentiation. In addition, extracellular matrix stiffness is important for maintaining normal tissue homeostasis, and when matrix mechanics become imbalanced, disease progression may ensue. In this article, we will review the important role that matrix stiffness plays in dictating cell behavior during development, tissue homeostasis, and disease progression.
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Key Words
- ECM, Extracellular matrix
- EPC, Endothelial progenitor cell
- FA, Focal adhesion
- FAK, Focal adhesion kinase
- LOX, Lysyl oxidase
- MKL1, Megakaryoblastic leukemia factor-1
- MMP, Matrix metalloproteinase
- MSC, Mesenchymal stem cell
- ROCK, Rho-associated protein kinase
- VSMC, Vascular smooth muscle cell.
- cancer
- extracellular matrix
- fibrosis
- stiffness
- tissue development
- tissue homeostasis
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Affiliation(s)
- Andrew M Handorf
- a Department of Orthopedics and Rehabilitation; University of Wisconsin-Madison ; Madison , WI , USA
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25
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Lakshmanan I, Rachagani S, Hauke R, Krishn SR, Paknikar S, Seshacharyulu P, Karmakar S, Nimmakayala RK, Kaushik G, Johansson SL, Carey GB, Ponnusamy MP, Kaur S, Batra SK, Ganti AK. MUC5AC interactions with integrin β4 enhances the migration of lung cancer cells through FAK signaling. Oncogene 2016; 35:4112-21. [PMID: 26751774 DOI: 10.1038/onc.2015.478] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/29/2015] [Accepted: 11/10/2015] [Indexed: 01/07/2023]
Abstract
MUC5AC is a secretory mucin aberrantly expressed in various cancers. In lung cancer, MUC5AC is overexpressed in both primary and metastatic lesions; however, its functional role is not well understood. The present study was aimed at evaluating mechanistic role of MUC5AC on metastasis of lung cancer cells. Clinically, the overexpression of MUC5AC was observed in lung cancer patient tissues and was associated with poor survival. In addition, the overexpression of Muc5ac was also observed in genetically engineered mouse lung adenocarcinoma tissues (Kras(G12D); Trp53(R172H/+); AdCre) in comparison with normal lung tissues. Our functional studies showed that MUC5AC knockdown resulted in significantly decreased migration in two lung cancer cell lines (A549 and H1437) as compared with scramble cells. Expression of integrins (α5, β1, β3, β4 and β5) was decreased in MUC5AC knockdown cells. As both integrins and MUC5AC have a von Willebrand factor domain, we assessed for possible interaction of MUC5AC and integrins in lung cancer cells. MUC5AC strongly interacted only with integrin β4. The co-localization of MUC5AC and integrin β4 was observed both in A549 lung cancer cells as well as genetically engineered mouse adenocarcinoma tissues. Activated integrins recruit focal adhesion kinase (FAK) that mediates metastatic downstream signaling pathways. Phosphorylation of FAK (Y397) was decreased in MUC5AC knockdown cells. MUC5AC/integrin β4/FAK-mediated lung cancer cell migration was confirmed through experiments utilizing a phosphorylation (Y397)-specific FAK inhibitor. In conclusion, overexpression of MUC5AC is a poor prognostic marker in lung cancer. MUC5AC interacts with integrin β4 that mediates phosphorylation of FAK at Y397 leading to lung cancer cell migration.
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Affiliation(s)
- I Lakshmanan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - R Hauke
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S R Krishn
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S Paknikar
- Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - P Seshacharyulu
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S Karmakar
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - R K Nimmakayala
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - G Kaushik
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S L Johansson
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA.,Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center University of Nebraska Medical Center, Omaha, NE, USA
| | - G B Carey
- Section of Hematology-Oncology, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - M P Ponnusamy
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.,Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center University of Nebraska Medical Center, Omaha, NE, USA
| | - S Kaur
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.,Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center University of Nebraska Medical Center, Omaha, NE, USA
| | - A K Ganti
- Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA.,Department of Internal Medicine, VA Nebraska Western Iowa Health Care System and University of Nebraska Medical Center, Omaha, NE, USA
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26
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Kreida S, Törnroth-Horsefield S. Structural insights into aquaporin selectivity and regulation. Curr Opin Struct Biol 2015; 33:126-34. [PMID: 26342685 DOI: 10.1016/j.sbi.2015.08.004] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 08/05/2015] [Accepted: 08/07/2015] [Indexed: 11/26/2022]
Abstract
Aquaporins have emerged as one of the structurally best-characterized membrane protein families, with fourteen different structures available from a diverse range of organisms. While all aquaporins share the same fold and passive mechanism for water permeation, structural details allow for differences in selectivity and modes of regulation. These details are now the emphasis of aquaporin structural biology. Recent structural studies of eukaryotic aquaporins have revealed reoccurring structural themes in both gating and trafficking, implying a limited number of structural solutions to aquaporin regulation. Moreover, the groundbreaking subangstrom resolution structure of a yeast aquaporin allows hydrogens to be visualized in the water-conducting channel, providing exclusive new insights into the proton exclusion mechanism.
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Affiliation(s)
- Stefan Kreida
- Department of Biochemistry and Structural Biology, Centre for Protein Molecular Science, Lund University, Lund, Sweden
| | - Susanna Törnroth-Horsefield
- Department of Biochemistry and Structural Biology, Centre for Protein Molecular Science, Lund University, Lund, Sweden.
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27
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Yin Y, Deng X, Liu Z, Baldwin LA, Lefringhouse J, Zhang J, Hoff JT, Erfani SF, Rucker EB, O'Connor K, Liu C, Wu Y, Zhou BP, Yang XH. CD151 represses mammary gland development by maintaining the niches of progenitor cells. Cell Cycle 2015; 13:2707-22. [PMID: 25486358 DOI: 10.4161/15384101.2015.945823] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tetraspanin CD151 interacts with laminin-binding integrins (i.e., α3β1, α6β1 and α6β4) and other cell surface molecules to control diverse cellular and physiological processes, ranging from cell adhesion, migration and survival to tissue architecture and homeostasis. Here, we report a novel role of CD151 in maintaining the branching morphogenesis and activity of progenitor cells during the pubertal development of mammary glands. In contrast to the disruption of laminin-binding integrins, CD151 removal in mice enhanced the tertiary branching in mammary glands by 2.4-fold and the number of terminal end buds (TEBs) by 30%, while having minimal influence on either primary or secondary ductal branching. Consistent with these morphological changes are the skewed distribution of basal/myoepithelial cells and a 3.2-fold increase in proliferating Ki67-positive cells. These novel observations suggest that CD151 impacts the branching morphogenesis of mammary glands by upregulating the activities of bipotent progenitor cells. Indeed, our subsequent analyses indicate that upon CD151 removal the proportion of CD24(Hi)CD49f(Low) progenitor cells in the mammary gland increased by 34%, and their proliferating and differentiating activities were significantly upregulated. Importantly, fibronectin, a pro-branching extracellular matrix (ECM) protein deposited underlying mammary epithelial or progenitor cells, increased by >7.2-fold. Moreover, there was a concomitant increase in the expression and nuclear distribution of Slug, a transcription factor implicated in the maintenance of mammary progenitor cell activities. Taken together, our studies demonstrate that integrin-associated CD151 represses mammary branching morphogenesis by controlling progenitor cell activities, ECM integrity and transcription program.
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Affiliation(s)
- Yuanqin Yin
- a Cancer Institute; First Affiliated Hospital ; China Medical University ; Shenyang , China
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28
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Using real-time impedance-based assays to monitor the effects of fibroblast-derived media on the adhesion, proliferation, migration and invasion of colon cancer cells. Biosci Rep 2014; 34:BSR20140031. [PMID: 24935351 PMCID: PMC4114067 DOI: 10.1042/bsr20140031] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Increasing our knowledge of the mechanisms regulating cell proliferation, migration and invasion are central to understanding tumour progression and metastasis. The local tumour microenvironment contributes to the transformed phenotype in cancer by providing specific environmental cues that alter the cells behaviour and promotes metastasis. Fibroblasts have a strong association with cancer and in recent times there has been some emphasis in designing novel therapeutic strategies that alter fibroblast behaviour in the tumour microenvironment. Fibroblasts produce growth factors, chemokines and many of the proteins laid down in the ECM (extracellular matrix) that promote angiogenesis, inflammation and tumour progression. In this study, we use a label-free RTCA (real-time cell analysis) platform (xCELLigence) to investigate how media derived from human fibroblasts alters cancer cell behaviour. We used a series of complimentary and novel experimental approaches to show HCT116 cells adhere, proliferate and migrate significantly faster in the presence of media from human fibroblasts. As well as this, we used the xCELLigence CIM-plates system to show that HCT116 cells invade matrigel layers aggressively when migrating towards media derived from human fibroblasts. These data strongly suggest that fibroblasts have the ability to increase the migratory and invasive properties of HCT116 cells. This is the first study that provides real-time data on fibroblast-mediated migration and invasion kinetics of colon cancer cells.
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29
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Mazzaferri J, Costantino S, Lefrancois S. Analysis of AQP4 trafficking vesicle dynamics using a high-content approach. Biophys J 2014; 105:328-37. [PMID: 23870254 DOI: 10.1016/j.bpj.2013.06.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 06/05/2013] [Accepted: 06/07/2013] [Indexed: 01/11/2023] Open
Abstract
Aquaporin-4 (AQP4) is found on the basolateral plasma membrane of a variety of epithelial cells, and it is widely accepted that microtubules play an important role in protein trafficking to the plasma membrane. In the particular case of polarized trafficking, however, most evidence on the involvement of microtubules has been obtained via biochemistry experiments and single-shot microscopy. These approaches have provided essential information, even though they neglect the dynamical details of microtubule transport. In this work, we present a high-content framework in which time-lapse imaging, and single-particle-tracking algorithms were used to study a large number (∼10(4)) of GFP-AQP4-carrying vesicles on a large number of cells (∼170). By analyzing several descriptors in this large sample of trajectories, we were able to obtain highly statistically significant results. Our results support the hypothesis that AQP4 is transported along microtubules, but to our surprise, this transport is not directed straight to the basolateral plasma membrane. On the contrary, these vesicles move stochastically along microtubules, changing direction repeatedly. We propose that the role of microtubules in the basolateral trafficking of AQP4 is to increase the efficiency, rather than determine the specificity of the target.
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Affiliation(s)
- Javier Mazzaferri
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Canada
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30
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Fabrick JA, Pei J, Hull JJ, Yool AJ. Molecular and functional characterization of multiple aquaporin water channel proteins from the western tarnished plant bug, Lygus hesperus. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2014; 45:125-140. [PMID: 24333473 DOI: 10.1016/j.ibmb.2013.12.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 11/27/2013] [Accepted: 12/01/2013] [Indexed: 06/03/2023]
Abstract
Aquaporins (AQPs) are integral membrane channel proteins that facilitate the bidirectional transfer of water or other small solutes across biological membranes involved in numerous essential physiological processes. In arthropods, AQPs belong to several subfamilies, which contribute to osmoregulation, respiration, cryoprotection, anhydrobiosis, and excretion. We cloned and characterized five novel AQPs from the western tarnished plant bug, Lygus hesperus, a polyphagous insect pest of food and fiber crops throughout western North America. The L. hesperus AQPs (LhAQP1-5) belong to different phylogenetic subfamilies, have unique transcription profiles and cellular localizations, and all transport water (but not glycerol) when heterologously expressed in Xenopus laevis oocytes. Our results demonstrate that multiple AQPs with possible compensatory functions are produced in L. hesperus that likely play important roles in maintaining water homeostasis in this important insect pest.
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Affiliation(s)
- Jeffrey A Fabrick
- USDA-ARS, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85138, USA.
| | - Jinxin Pei
- University of Adelaide, School of Medical Sciences, Frome Rd., Medical School South, Adelaide, SA 5005, Australia
| | - J Joe Hull
- USDA-ARS, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85138, USA
| | - Andrea J Yool
- University of Adelaide, School of Medical Sciences, Frome Rd., Medical School South, Adelaide, SA 5005, Australia
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31
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De Bellis M, Pisani F, Mola MG, Basco D, Catalano F, Nicchia GP, Svelto M, Frigeri A. A novel human aquaporin-4 splice variant exhibits a dominant-negative activity: a new mechanism to regulate water permeability. Mol Biol Cell 2013; 25:470-80. [PMID: 24356448 PMCID: PMC3923639 DOI: 10.1091/mbc.e13-06-0331] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
An alternatively spliced transcript of human AQP4 that lacks exon 4 is identified. In transfected cells, AQP4-Δ4 shows no water transport properties, is retained in the ER, and has a dominant-negative effect on full-length AQP4. In skeletal muscles, AQP4-Δ4 mRNA expression inversely correlates with the level of AQP4 protein in different muscles. Two major isoforms of aquaporin-4 (AQP4) have been described in human tissue. Here we report the identification and functional analysis of an alternatively spliced transcript of human AQP4, AQP4-Δ4, that lacks exon 4. In transfected cells AQP4-Δ4 is mainly retained in the endoplasmic reticulum and shows no water transport properties. When AQP4-Δ4 is transfected into cells stably expressing functional AQP4, the surface expression of the full-length protein is reduced. Furthermore, the water transport activity of the cotransfectants is diminished in comparison to transfectants expressing only AQP4. The observed down-regulation of both the expression and water channel activity of AQP4 is likely to originate from a dominant-negative effect caused by heterodimerization between AQP4 and AQP4-Δ4, which was detected in coimmunoprecipitation studies. In skeletal muscles, AQP4-Δ4 mRNA expression inversely correlates with the level of AQP4 protein and is physiologically associated with different types of skeletal muscles. The expression of AQP4-Δ4 may represent a new regulatory mechanism through which the cell-surface expression and therefore the activity of AQP4 can be physiologically modulated.
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Affiliation(s)
- Manuela De Bellis
- Department of Bioscience, Biotechnologies and Biopharmaceutics and Center of Excellence in Comparative Genomics, University of Bari "Aldo Moro," 70126 Bari, Italy Center for Integrative Genomics, University of Lausanne, 1015 Lausanne, Switzerland M. Sarcone Hospital, 70038 Terlizzi, Bari, Italy
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Ishibashi K, Tanaka Y, Morishita Y. The role of mammalian superaquaporins inside the cell. Biochim Biophys Acta Gen Subj 2013; 1840:1507-12. [PMID: 24189537 DOI: 10.1016/j.bbagen.2013.10.039] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 10/18/2013] [Accepted: 10/23/2013] [Indexed: 01/06/2023]
Abstract
BACKGROUND The mammalian two superaquaporins, AQP11 and AQP12, are present inside the cell and their null phenotypes in mice suggest their unusual functions. SCOPE OF REVIEW The surveyed literature on these superaquaporins and our unpublished data has been incorporated to speculate their roles. MAJOR CONCLUSIONS AQP11 and AQP12 have unique NPA boxes with a signature cysteine residue. Although some water permeability of AQP11 was demonstrated in liposomes and cultured cells, its permeability to glycerol is unknown. The function of AQP12 still remains to be clarified. AQP11 null mice develop polycystic kidneys following large intracellular vacuoles in the proximal tubule, which may be caused by ER stress or vesicle fusion failure. The role of AQP11 in the kidney and liver seems to alleviate the tissue damage and facilitate the recovery. Its expression in the sperm, thymus and brain suggests its potential roles in these organs in spite of the apparently normal null phenotype. Although AQP12 null mice appear normal, they suffer from severe pancreatitis, suggesting its role in the fusion of zymogen granules. GENERAL SIGNIFICANCE As many issues are unsolved, the clarification of the function and roles of the superaquaporin may lead to the identification of new roles of AQPs. This article is part of a Special Issue entitled Aquaporins.
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Affiliation(s)
- Kenichi Ishibashi
- Department of Medical Physiology, School of Pharmacy, Meiji Pharmaceutical University, Tokyo, Japan.
| | - Yasuko Tanaka
- Department of Medical Physiology, School of Pharmacy, Meiji Pharmaceutical University, Tokyo, Japan
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33
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Atanu FO, Oviedo-Orta E, Watson KA. A novel transport mechanism for MOMP in Chlamydophila pneumoniae and its putative role in immune-therapy. PLoS One 2013; 8:e61139. [PMID: 23637791 PMCID: PMC3634821 DOI: 10.1371/journal.pone.0061139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 03/05/2013] [Indexed: 01/31/2023] Open
Abstract
Major outer membrane proteins (MOMPs) of Gram negative bacteria are one of the most intensively studied membrane proteins. MOMPs are essential for maintaining the structural integrity of bacterial outer membranes and in adaptation of parasites to their hosts. There is evidence to suggest a role for purified MOMP from Chlamydophila pneumoniae and corresponding MOMP-derived peptides in immune-modulation, leading to a reduced atherosclerotic phenotype in apoE(-/-) mice via a characteristic dampening of MHC class II activity. The work reported herein tests this hypothesis by employing a combination of homology modelling and docking to examine the detailed molecular interactions that may be responsible. A three-dimensional homology model of the C. pneumoniae MOMP was constructed based on the 14 transmembrane β-barrel crystal structure of the fatty acid transporter from Escherichia coli, which provides a plausible transport mechanism for MOMP. Ligand docking experiments were used to provide details of the possible molecular interactions driving the binding of MOMP-derived peptides to MHC class II alleles known to be strongly associated with inflammation. The docking experiments were corroborated by predictions from conventional immuno-informatic algorithms. This work supports further the use of MOMP in C. pneumoniae as a possible vaccine target and the role of MOMP-derived peptides as vaccine candidates for immune-therapy in chronic inflammation that can result in cardiovascular events.
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Affiliation(s)
- Francis O. Atanu
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading, Berkshire, United Kingdom
| | - Ernesto Oviedo-Orta
- University of Surrey, Faculty of Health and Medical Sciences, Guildford, United Kingdom
| | - Kimberly A. Watson
- School of Biological Sciences, Whiteknights Campus, University of Reading, Reading, Berkshire, United Kingdom
- * E-mail:
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34
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Li M, Su W, Wang J, Pisani F, Frigeri A, Ma T. Detection of anti-aquaporin-4 autoantibodies in the sera of Chinese neuromyelitis optica patients. Neural Regen Res 2013; 8:708-13. [PMID: 25206717 PMCID: PMC4146080 DOI: 10.3969/j.issn.1673-5374.2013.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 11/15/2012] [Indexed: 11/23/2022] Open
Abstract
In this study, we recruited 10 neuromyelitis optica patients, two multiple sclerosis patients and two myelitis patients. Chinese hamster lung fibroblast (V79) cells transfected with a human aquaporin-4-mCherry fusion protein gene were used to detect anti-aquaporin-4 antibody in neuromyelitis optica patient sera by immunofluorescence. Anti-aquaporin-4 autoantibody was stably detected by immunofluorescence in neuromyelitis optica patient sera exclusively. The sensitivity of the assay for neuromyelitis optica was 90% and the specificity for neuromyelitis optica was 100%. The anti-aquaporin-4 antibody titers in sera were tested with serial dilutions until the signal disappeared. A positive correlation was detected between Expanded Disability Status Scale scores and serum anti-aquaporin-4 antibody titers. The anti-aquaporin-4 antibody assay is highly sensitive and specific in the sera of Chinese neuromyelitis optica patients. Detection of aquaporin-4 autoantibody is important for the diagnosis and treatment of neuromyelitis optica.
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Affiliation(s)
- Miao Li
- Membrane Channel Research Laboratory, Northeast Normal University, Changchun 130024, Jilin Province, China ; Department of Neurosurgery, China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Weiheng Su
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun 130012, Jilin Province, China
| | - Jie Wang
- Department of Neurosurgery, China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China
| | - Francesco Pisani
- Department of General and Environmental Physiology and Centre of Excellence in Comparative Genomics (CEGBA), University of Bari, I-70126 Bari, Italy
| | - Antonio Frigeri
- Department of General and Environmental Physiology and Centre of Excellence in Comparative Genomics (CEGBA), University of Bari, I-70126 Bari, Italy
| | - Tonghui Ma
- Membrane Channel Research Laboratory, Northeast Normal University, Changchun 130024, Jilin Province, China
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Conner AC, Bill RM, Conner MT. An emerging consensus on aquaporin translocation as a regulatory mechanism. Mol Membr Biol 2012; 30:1-12. [DOI: 10.3109/09687688.2012.743194] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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36
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Goel HL, Mercurio AM. Enhancing integrin function by VEGF/neuropilin signaling: implications for tumor biology. Cell Adh Migr 2012; 6:554-60. [PMID: 23076131 DOI: 10.4161/cam.22419] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This review advances the hypothesis that the ability of integrins to engage their extracellular matrix ligands and signal can be regulated in tumor cells by vascular endothelial growth factor (VEGF), a major angiogenic factor that also has direct effects on the function of tumor cells. More specifically, we will discuss how neuropilins (NRPs), a distinct class of VEGF receptors, enable the function of specific integrins that contribute to tumor initiation and progression.
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Affiliation(s)
- Hira Lal Goel
- Department of Cancer Biology University of Massachusetts Medical School Worcester, MA, USA
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Howe GA, Addison CL. β1 integrin: an emerging player in the modulation of tumorigenesis and response to therapy. Cell Adh Migr 2012; 6:71-7. [PMID: 22568952 DOI: 10.4161/cam.20077] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Historically, a hallmark of tumorigenesis was the ability to grow in an anchorage-independent manner. Hence, tumors were thought to proliferate and survive independently of integrin attachment to the substratum. However, recent data suggest that integrins regulate not only tumor cell proliferation, survival and migration, but may also influence their response to anti-cancer agents. Interestingly, these influences are largely masked by growth of tumor cells in the standard, yet artificial, environment of 2D cell culture, but are readily apparent under 3D in vitro culture conditions and in tumor growth in vivo. We, and others, have recently demonstrated that the β1 integrin subunit controls the growth and invasion of prostate tumor cells in 3D culture conditions. Recently, the importance of integrins has also been demonstrated using tissue specific conditional knockout strategies in transgenic mouse tumor models, where they control primary tumor growth and dictate the site of metastatic spread. Furthermore, integrin-extracellular matrix interactions may modulate the response of tumors to standard chemotherapy agents or radiation. Taken together, these results highlight the important role of integrins in regulating tumor growth and metastasis; however, point out that the evaluation of their contribution to these processes requires appropriate contextual modeling.
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Affiliation(s)
- Grant A Howe
- Program for Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, ON Canada
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Gupta AB, Verma RK, Agarwal V, Vajpai M, Bansal V, Sankararamakrishnan R. MIPModDB: a central resource for the superfamily of major intrinsic proteins. Nucleic Acids Res 2012; 40:D362-9. [PMID: 22080560 PMCID: PMC3245135 DOI: 10.1093/nar/gkr914] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 10/05/2011] [Accepted: 10/08/2011] [Indexed: 12/23/2022] Open
Abstract
The channel proteins belonging to the major intrinsic proteins (MIP) superfamily are diverse and are found in all forms of life. Water-transporting aquaporin and glycerol-specific aquaglyceroporin are the prototype members of the MIP superfamily. MIPs have also been shown to transport other neutral molecules and gases across the membrane. They have internal homology and possess conserved sequence motifs. By analyzing a large number of publicly available genome sequences, we have identified more than 1000 MIPs from diverse organisms. We have developed a database MIPModDB which will be a unified resource for all MIPs. For each MIP entry, this database contains information about the source, gene structure, sequence features, substitutions in the conserved NPA motifs, structural model, the residues forming the selectivity filter and channel radius profile. For selected set of MIPs, it is possible to derive structure-based sequence alignment and evolutionary relationship. Sequences and structures of selected MIPs can be downloaded from MIPModDB database which is freely available at http://bioinfo.iitk.ac.in/MIPModDB.
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Affiliation(s)
- Anjali Bansal Gupta
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Ravi Kumar Verma
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Vatsal Agarwal
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Manu Vajpai
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Vivek Bansal
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Ramasubbu Sankararamakrishnan
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016 and Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, India
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Ishibashi K, Kondo S, Hara S, Morishita Y. The evolutionary aspects of aquaporin family. Am J Physiol Regul Integr Comp Physiol 2011; 300:R566-76. [DOI: 10.1152/ajpregu.90464.2008] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Aquaporins (AQPs) were originally identified as channels facilitating water transport across the plasma membrane. They have a pair of highly conserved signature sequences, asparagine-proline-alanine (NPA) boxes, to form a pore. However, some have little conserved amino acid sequences around the NPA boxes unclassifiable to two previous AQP subfamilies, classical AQPs and aquaglyceroporins. These will be called unorthodox AQPs in this review. Interestingly, these unorthodox AQPs have a highly conserved cysteine residue downstream of the second NPA box. AQPs also have a diversity of functions: some related to water transport such as fluid secretion, fluid absorption, and cell volume regulation, and the others not directly related to water transport such as cell adhesion, cell migration, cell proliferation, and cell differentiation. Some AQPs even permeate nonionic small molecules, ions, metals, and possibly gasses. AQP gene disruption studies have revealed their physiological roles: water transport in the kidney and exocrine glands, glycerol transport in fat metabolism and in skin moisture, and nutrient uptakes in plants. Furthermore, AQPs are also present at intracellular organelles, including tonoplasts, mitochondria, and the endoplasmic reticulum. This review focuses on the evolutionary aspects of AQPs from bacteria to humans in view of the structural and functional diversities of AQPs.
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Affiliation(s)
- Kenichi Ishibashi
- Department of Medical Physiology, Meiji Pharmaceutical University, Kiyose, Tokyo; and
| | - Shintaro Kondo
- Department of Medical Physiology, Meiji Pharmaceutical University, Kiyose, Tokyo; and
| | - Shigeki Hara
- Department of Medical Physiology, Meiji Pharmaceutical University, Kiyose, Tokyo; and
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40
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Mathew LG, Campbell EM, Yool AJ, Fabrick JA. Identification and characterization of functional aquaporin water channel protein from alimentary tract of whitefly, Bemisia tabaci. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2011; 41:178-190. [PMID: 21146609 DOI: 10.1016/j.ibmb.2010.12.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/03/2010] [Accepted: 12/02/2010] [Indexed: 05/30/2023]
Abstract
Some hemipteran xylem and phloem-feeding insects have evolved specialized alimentary structures or filter chambers that rapidly transport water for excretion or osmoregulation. In the whitefly, Bemisia tabaci, mass movement of water through opposing alimentary tract tissues within the filter chamber is likely facilitated by an aquaporin protein. B. tabaci aquaporin-1 (BtAQP1) possesses characteristic aquaporin topology and conserved pore-forming residues found in water-specific aquaporins. As predicted for an integral transmembrane protein, recombinant BtAQP1 expressed in cultured insect cells localized within the plasma membrane. BtAQP1 is primarily expressed in early instar nymphs and adults, where in adults it is localized in the filter chamber and hindgut. Xenopus oocytes expressing BtAQP1 were water permeable and mercury-sensitive, both characteristics of classical water-specific aquaporins. These data support the hypothesis that BtAQP1 is a water transport protein within the specialized filter chamber of the alimentary tract and functions to translocate water across tissues for maintenance of osmotic pressure and/or excretion of excess dietary fluid.
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Affiliation(s)
- Lolita G Mathew
- USDA-ARS, U.S. Arid Land Agricultural Research Center, 21881 North Cardon Lane, Maricopa, AZ 85138, USA
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Edemir B, Pavenstädt H, Schlatter E, Weide T. Mechanisms of cell polarity and aquaporin sorting in the nephron. Pflugers Arch 2011; 461:607-21. [PMID: 21327781 DOI: 10.1007/s00424-011-0928-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 01/14/2011] [Accepted: 01/16/2011] [Indexed: 01/02/2023]
Abstract
The kidneys participate in whole-body homeostasis, regulating acid-base balance, electrolyte concentrations, extracellular fluid volume, and regulation of blood pressure. Many of the kidney's functions are accomplished by relatively simple mechanisms of filtration, reabsorption, and secretion, which take place in the nephron. The kidneys generate 140-180 l of primary urine per day, while reabsorbing a large percentage, allowing for only the excretion of approximately 2 l of urine. Within the nephron, the majority of the filtered water and solutes are reabsorbed. This is mainly facilitated by specialized transporters and channels which are localized at different segments of the nephron and asymmetrically localized within the polarized epithelial cells. The asymmetric localization of these transporters and channels is essential for the physiological tasks of the renal tissues. One family of these proteins are the water-permeable aquaporins which are selectively expressed in cells along the nephron and localized at different compartments. Here, we discuss potential molecular links between mechanisms involved in the establishment of cell polarity and the members of the aquaporin family. In the first part of this review, we will focus on aspects of apical cell polarity. In the second part, we will review the motifs identified so far that are involved in aquaporin sorting and point out potential molecular links.
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Affiliation(s)
- Bayram Edemir
- Medizinische Klinik und Poliklinik D, Experimentelle und Molekulare Nephrologie, Universität Münster, Germany.
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Siu MK, Wong CH, Xia W, Mruk DD, Lee WM, Cheng CY. The β1-integrin-p-FAK-p130Cas-DOCK180-RhoA-vinculin is a novel regulatory protein complex at the apical ectoplasmic specialization in adult rat testes. SPERMATOGENESIS 2011; 1:73-86. [PMID: 21866278 DOI: 10.4161/spmg.1.1.15452] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2001] [Revised: 02/11/2011] [Accepted: 03/11/2011] [Indexed: 12/21/2022]
Abstract
During spermatogenesis, step 1 spermatids (round spermatids) derive from spermatocytes following meiosis I and II at stage XIV of the epithelial cycle begin a series of morphological transformation and differentiation via 19 steps in rats to form spermatozoa. This process is known as spermiogenesis, which is marked by condensation of the genetic material in the spermatid head, formation of the acrosome and elongation of the tail. Since developing spermatids are lacking the robust protein synthesis and transcriptional activity, the cellular, molecular and morphological changes associated with spermiogenesis rely on the Sertoli cell in the seminiferous epithelium via desmosome and gap junction between Sertoli cells and step 1-7 spermatids. Interestingly, a unique anchoring junction type arises at the interface of step 8 spermatid and Sertoli cell known as apical ectoplasmic specialization (apical ES). Once it appears, apical ES is the only anchoring device restricted to the interface of step 8-19 spermatids and Sertoli cells to confer spermatid polarity, adhesion, signal communication and structural support, and to provide nutritional support during spermiogenesis, replacing desmosome and gap junction. While the adhesion protein complexes that constitute the apical ES are known, the signaling protein complexes that regulate apical ES dynamics, however, remain largely unknown. Herein we report the presence of a FAK (focal adhesion kinase)-p130Cas (p130 Crk-associated substrate)-DOCK180 (Dedicator of cytokinesis 180)-RhoA (Ras homolog gene family, member A)-vinculin signaling protein complex at the apical ES, which is also an integrated component of the β1-integrin-based adhesion protein complex based on co-immunoprecipitation experiment. It was also shown that besides p-FAK-Tyr(397) and p-FAK-Tyr(576), β1-integrin, p130Cas, RhoA and vinculin displayed stage-specific expression in the seminiferous epithelium during the epithelial cycle with predominant localization at the apical ES as demonstrated by immunohistochemistry. Based on these findings, functional studies can now be performed to assess the role of this β1-integrin-p-FAK-p130Cas-DOCK180-RhoA-vinculin protein complex in apical ES dynamics during spermiogenesis.
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Affiliation(s)
- Michelle Ky Siu
- Center for Biomedical Research; The Population Council; New York, NY USA
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Aldinucci A, Rizzetto L, Pieri L, Nosi D, Romagnoli P, Biagioli T, Mazzanti B, Saccardi R, Beltrame L, Massacesi L, Cavalieri D, Ballerini C. Inhibition of Immune Synapse by Altered Dendritic Cell Actin Distribution: A New Pathway of Mesenchymal Stem Cell Immune Regulation. THE JOURNAL OF IMMUNOLOGY 2010; 185:5102-10. [DOI: 10.4049/jimmunol.1001332] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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