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Inhibition of Glyco...
Inhibition of Glycogen Synthase Kinase (GSK-3) Protects Against Oxidative Stress and Attenuates Apoptosis in Human Lens Epithelial Cells and the Mouse Lens in Organ Culure
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- Karlsson, Jan-Olof, 1944 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för anatomi och cellbiologi,Institute of Anatomy and Cell Biology
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- Petersen, Anne, 1962 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för anatomi och cellbiologi,Institute of Anatomy and Cell Biology
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- Zetterberg, Madeleine, 1969 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för klinisk neurovetenskap, Sektionen för oftalmologi,Institute of Clinical Neurosciences, Section of Ophtalmology
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- Zetterberg, Henrik, 1973 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för klinisk neurovetenskap, Sektionen för laborativ neurovetenskap,Institute of Clinical Neurosciences, Section of Experimental Neuroscience
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- Sjöstrand, Johan, 1936 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för klinisk neurovetenskap, Sektionen för oftalmologi,Institute of Clinical Neurosciences, Section of Ophtalmology
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visa färre...
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(creator_code:org_t)
- 2005
- 2005
- Engelska.
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Ingår i: Invest. Ophthalmol. Vis. Sci.. ; 46:5, s. 3867-
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- Purpose: GSK-3 may regulate Wnt signaling, gene expression, the cell cycle, cell differentiation and apoptosis. Inhibition of GSK-3 can be obtained via the structurally unrelated substances lithum or Kenpaullone. The lens and the lens epithelial cells are excellent models to study the role of this enzyme. Methods: Primary cultures of human lens epithelial cells (HLEC) or the mouse lens in organ culture were exposed to the GSK-3 inhibitors lithium (2 mM) or Kenpaullone (2 {micro}M) for times upp to 24h.The cells were, before or after treatment, placed in medium containing fluorogenic indicators of oxidative damage. DCFH-DA was used to assay peroxides, mitochondrial function was evaluated with Rhodamine 123 and JC-1, monochlorobimane was used to assay intracellular glutathione (GSH) levels, Proteolytic activities were assayed, on line, with cell-permeable fluorogenic substrates.Proteasome and calpain activities were assayed with LLVY-AMC, Cathepsin B with RR-AMC or FR-AMC. Metalloproteases were assayed with AAF-AMC. Caspase-3, 8 and 9 were assayed in cell extracts with DEVD-, IETD- or LEHD-AMC, respectively. Results: The mitochondrial membrane potential and the level of GSH increased by 10% after treatment of HLEC with Li or Kenpaullone for 24h. No change was observed for peroxide production. The basal (low) level of caspase-3 activity was decreased by at least 20%. No significant effects were found concerning caspase-8 or 9 activities. No effect was observed on the activity of calpain, the proteasome, metalloproteases and cathepsin D/E activity.The whole mouse lens in organ culture showed essentially the same elevated mitochondrial potential. The GSH increase was even more evident in the whole lens preparation. Conclusions: Inhibition of GSK-3 may protect against oxidative stress (and cataract) via prevention of MPT induction and attenuate apoptosis in HLEC.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)