Aquaporin 1 and 5 expression decreases during human intervertebral disc degeneration: Novel HIF-1-mediated regulation of aquaporins in NP cells
dc.contributor.author | Johnson, ZI | |
dc.contributor.author | Gogate, SS | |
dc.contributor.author | Day, R | |
dc.contributor.author | Binch, A | |
dc.contributor.author | Markova, DZ | |
dc.contributor.author | Chiverton, N | |
dc.contributor.author | Cole, A | |
dc.contributor.author | Shapiro, IM | |
dc.contributor.author | Le Maitre, CL | |
dc.contributor.author | Risbud, MV | |
dc.contributor.author | Conner, Matthew T. | |
dc.date.accessioned | 2019-05-13T11:45:25Z | |
dc.date.available | 2019-05-13T11:45:25Z | |
dc.date.issued | 2015-03-20 | |
dc.identifier.citation | Johnson, Z. I., Gogate, S. S., Day, R., Binch, A., Dessislava Z. M., Chiverton, N., Cole, A., Conner, M., Shapiro, I. M., Le Maitre, C. L. and Risbud, M. V. (2015) Aquaporin 1 and 5 expression decreases during human intervertebral disc degeneration: Novel HIF-1-mediated regulation of aquaporins in NP cells, Oncotarget, 6(14), pp. 11945-11958. | en |
dc.identifier.pmid | 25844601 | |
dc.identifier.doi | 10.18632/oncotarget.3631 | en |
dc.identifier.uri | http://hdl.handle.net/2436/622346 | |
dc.description.abstract | Objectives of this study were to investigate whether AQP1 and AQP5 expression is altered during intervertebral disc degeneration and if hypoxia and HIF-1 regulate their expression in NP cells. AQP expression was measured in human tissues from different degenerative grades; regulation by hypoxia and HIF-1 was studied using promoter analysis and gain- and loss-of-function experiments. We show that both AQPs are expressed in the disc and that mRNA and protein levels decline with human disease severity. Bioinformatic analyses of AQP promoters showed multiple evolutionarily conserved HREs. Surprisingly, hypoxia failed to induce promoter activity or expression of either AQP. While genomic chromatin immunoprecipitation showed limited binding of HIF-1α to conserved HREs, their mutation did not suppress promoter activities. Stable HIF-1α suppression significantly decreased mRNA and protein levels of both AQPs, but HIF-1α failed to induce AQP levels following accumulation. Together, our results demonstrate that AQP1 and AQP5 expression is sensitive to human disc degeneration and that HIF-1α uniquely maintains basal expression of both AQPs in NP cells, independent of oxemic tension and HIF-1 binding to promoter HREs. Diminished HIF-1 activity during degeneration may suppress AQP levels in NP cells, compromising their ability to respond to extracellular osmolarity changes. | en |
dc.description.sponsorship | This work is supported by grants from the National Institutes of Health AR055655, AR064733 and AR050087 (MVR). Zariel I. Johnson is supported by T32 AR052273. | en |
dc.format | application/PDF | en |
dc.language | eng | |
dc.language.iso | en | en |
dc.publisher | Impact Journals | en |
dc.relation.url | http://www.oncotarget.com/index.php?journal=oncotarget&page=article&op=view&path[]=3631&path[]=7417 | en |
dc.rights | Licence for published version: Creative Commons Attribution 4.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
dc.subject | Animals | en |
dc.subject | Humans | en |
dc.subject | Rats | en |
dc.subject | Microscopy, Fluorescence | en |
dc.subject | Blotting, Western | en |
dc.subject | Immunohistochemistry | en |
dc.subject | Chromatin Immunoprecipitation | en |
dc.subject | Transfection | en |
dc.subject | Cell Hypoxia | en |
dc.subject | Gene Expression Regulation | en |
dc.subject | Response Elements | en |
dc.subject | Aquaporin 1 | en |
dc.subject | Aquaporin 5 | en |
dc.subject | Hypoxia-Inducible Factor 1, alpha Subunit | en |
dc.subject | Real-Time Polymerase Chain Reaction | en |
dc.subject | Intervertebral Disc Degeneration | en |
dc.title | Aquaporin 1 and 5 expression decreases during human intervertebral disc degeneration: Novel HIF-1-mediated regulation of aquaporins in NP cells | en |
dc.type | Journal article | en |
dc.identifier.eissn | 1949-2553 | |
dc.identifier.journal | Oncotarget | en |
dc.date.updated | 2019-05-09T13:37:52Z | |
dc.contributor.institution | Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, PA, USA. | |
pubs.place-of-publication | United States | |
dc.date.accepted | 2015-03-05 | |
rioxxterms.funder | University of Wolverhampton | en |
rioxxterms.identifier.project | AR050087 | en |
rioxxterms.identifier.project | AR055655 | en |
rioxxterms.identifier.project | AR064733 | en |
rioxxterms.identifier.project | T32 AR052273 | en |
rioxxterms.identifier.project | R01 AR050087 | en |
rioxxterms.identifier.project | R01 AR055655 | en |
rioxxterms.identifier.project | R01 AR064733 | en |
rioxxterms.identifier.project | P30 CA056036 | en |
rioxxterms.version | VoR | en |
rioxxterms.licenseref.uri | http://creativecommons.org/licenses/by/4.0/ | en |
rioxxterms.licenseref.startdate | 2019-05-13 | en |
dc.source.volume | 6 | |
dc.source.issue | 14 | |
dc.source.beginpage | 11945 | |
dc.source.endpage | 11958 | |
dc.description.version | Published version | |
refterms.dateFCD | 2019-05-13T11:39:34Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2019-05-13T11:45:26Z |