Effects of bevacizumab on endoplasmic reticulum stress in hypoxic retinal pigment epithelial cells

To investigate the effects of bevacizumab on endoplasmic reticulum (ER) stress in human retinal pigment epithelial (RPE) cells cultured under hypoxic conditions. RPE cells (ARPE-19) were cultured under hypoxic conditions (1% O2) with or without bevacizumab (0.3125 mg/mL) for 24 and 48 h. Cell viabil...

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Veröffentlicht in:PloS one 2017-06, Vol.12 (6), p.e0179048-e0179048
Hauptverfasser: Park, Joo-Hee, Kim, Moosang, Oh, Jong-Hyun
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description To investigate the effects of bevacizumab on endoplasmic reticulum (ER) stress in human retinal pigment epithelial (RPE) cells cultured under hypoxic conditions. RPE cells (ARPE-19) were cultured under hypoxic conditions (1% O2) with or without bevacizumab (0.3125 mg/mL) for 24 and 48 h. Cell viability was measured by a PrestoBlue assay. The expression of vascular endothelial growth factor (VEGF), binding protein/glucose-regulated protein 78 (BiP/GRP78), and C/EBP homologous protein-10 (CHOP) mRNA was measured by quantitative real-time polymerase chain reaction (qRT-PCR). BiP/GRP78 and CHOP protein levels in the cells were assessed by western blot. VEGF protein in the media was quantified by enzyme-linked immunosorbent assay (ELISA). Under hypoxic conditions, cell viability decreased and mRNA and protein levels of VEGF, BiP/GRP78, and CHOP increased compared to those under normoxic conditions. Bevacizumab improved cell viability and reduced the expression of VEGF mRNA under hypoxic conditions. Bevacizumab also reduced the expression of both mRNA and protein of two ER stress indicators, BiP/GRP78 and CHOP, under hypoxic conditions. Bevacizumab mitigated ER stress in human RPE cells cultured under hypoxic conditions. This effect may be involved in the improved cell viability and reduction of VEGF expression after bevacizumab treatment of hypoxic RPE cells in vitro. However, the effects of bevacizumab on RPE cells under experimental conditions are unlikely to be clinically equivalent to those in the human eye.
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RPE cells (ARPE-19) were cultured under hypoxic conditions (1% O2) with or without bevacizumab (0.3125 mg/mL) for 24 and 48 h. Cell viability was measured by a PrestoBlue assay. The expression of vascular endothelial growth factor (VEGF), binding protein/glucose-regulated protein 78 (BiP/GRP78), and C/EBP homologous protein-10 (CHOP) mRNA was measured by quantitative real-time polymerase chain reaction (qRT-PCR). BiP/GRP78 and CHOP protein levels in the cells were assessed by western blot. VEGF protein in the media was quantified by enzyme-linked immunosorbent assay (ELISA). Under hypoxic conditions, cell viability decreased and mRNA and protein levels of VEGF, BiP/GRP78, and CHOP increased compared to those under normoxic conditions. Bevacizumab improved cell viability and reduced the expression of VEGF mRNA under hypoxic conditions. Bevacizumab also reduced the expression of both mRNA and protein of two ER stress indicators, BiP/GRP78 and CHOP, under hypoxic conditions. 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However, the effects of bevacizumab on RPE cells under experimental conditions are unlikely to be clinically equivalent to those in the human eye.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0179048</identifier><identifier>PMID: 28591217</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Age ; Angiogenesis ; Anoxia ; Apoptosis ; Assaying ; Bevacizumab ; Bevacizumab - administration &amp; dosage ; Biology and Life Sciences ; Carrier Proteins ; CCAAT/enhancer-binding protein ; Cell Survival - drug effects ; Cells, Cultured - drug effects ; CHOP protein ; Complications and side effects ; Dosage and administration ; Endoplasmic reticulum ; Endoplasmic Reticulum Stress - drug effects ; Endoplasmic Reticulum Stress - genetics ; Enzyme-linked immunosorbent assay ; Equivalence ; Experiments ; Eye ; Gene expression ; Gene Expression Regulation - drug effects ; Genetic aspects ; Glucose ; Heat-Shock Proteins - biosynthesis ; Homeostasis ; Homology ; Humans ; Hypoxia ; Immunotherapy ; In vitro methods and tests ; Indicators ; Macular degeneration ; Media ; Medicine and Health Sciences ; Monoclonal antibodies ; mRNA ; Oxidative stress ; Physical Sciences ; Physiological aspects ; Polymerase chain reaction ; Proteins ; Real time ; Research and Analysis Methods ; Retina ; Retinal pigment epithelium ; Retinal Pigment Epithelium - drug effects ; Retinal Pigment Epithelium - metabolism ; Retinal Pigments - metabolism ; Rodents ; Stresses ; Time measurement ; Transcription Factor CHOP - biosynthesis ; Vascular endothelial growth factor ; Vascular Endothelial Growth Factor A - biosynthesis</subject><ispartof>PloS one, 2017-06, Vol.12 (6), p.e0179048-e0179048</ispartof><rights>COPYRIGHT 2017 Public Library of Science</rights><rights>2017 Park et al. 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RPE cells (ARPE-19) were cultured under hypoxic conditions (1% O2) with or without bevacizumab (0.3125 mg/mL) for 24 and 48 h. Cell viability was measured by a PrestoBlue assay. The expression of vascular endothelial growth factor (VEGF), binding protein/glucose-regulated protein 78 (BiP/GRP78), and C/EBP homologous protein-10 (CHOP) mRNA was measured by quantitative real-time polymerase chain reaction (qRT-PCR). BiP/GRP78 and CHOP protein levels in the cells were assessed by western blot. VEGF protein in the media was quantified by enzyme-linked immunosorbent assay (ELISA). Under hypoxic conditions, cell viability decreased and mRNA and protein levels of VEGF, BiP/GRP78, and CHOP increased compared to those under normoxic conditions. Bevacizumab improved cell viability and reduced the expression of VEGF mRNA under hypoxic conditions. Bevacizumab also reduced the expression of both mRNA and protein of two ER stress indicators, BiP/GRP78 and CHOP, under hypoxic conditions. 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However, the effects of bevacizumab on RPE cells under experimental conditions are unlikely to be clinically equivalent to those in the human eye.</description><subject>Age</subject><subject>Angiogenesis</subject><subject>Anoxia</subject><subject>Apoptosis</subject><subject>Assaying</subject><subject>Bevacizumab</subject><subject>Bevacizumab - administration &amp; dosage</subject><subject>Biology and Life Sciences</subject><subject>Carrier Proteins</subject><subject>CCAAT/enhancer-binding protein</subject><subject>Cell Survival - drug effects</subject><subject>Cells, Cultured - drug effects</subject><subject>CHOP protein</subject><subject>Complications and side effects</subject><subject>Dosage and administration</subject><subject>Endoplasmic reticulum</subject><subject>Endoplasmic Reticulum Stress - drug effects</subject><subject>Endoplasmic Reticulum Stress - genetics</subject><subject>Enzyme-linked immunosorbent assay</subject><subject>Equivalence</subject><subject>Experiments</subject><subject>Eye</subject><subject>Gene expression</subject><subject>Gene Expression Regulation - 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administration &amp; dosage</topic><topic>Biology and Life Sciences</topic><topic>Carrier Proteins</topic><topic>CCAAT/enhancer-binding protein</topic><topic>Cell Survival - drug effects</topic><topic>Cells, Cultured - drug effects</topic><topic>CHOP protein</topic><topic>Complications and side effects</topic><topic>Dosage and administration</topic><topic>Endoplasmic reticulum</topic><topic>Endoplasmic Reticulum Stress - drug effects</topic><topic>Endoplasmic Reticulum Stress - genetics</topic><topic>Enzyme-linked immunosorbent assay</topic><topic>Equivalence</topic><topic>Experiments</topic><topic>Eye</topic><topic>Gene expression</topic><topic>Gene Expression Regulation - drug effects</topic><topic>Genetic aspects</topic><topic>Glucose</topic><topic>Heat-Shock Proteins - biosynthesis</topic><topic>Homeostasis</topic><topic>Homology</topic><topic>Humans</topic><topic>Hypoxia</topic><topic>Immunotherapy</topic><topic>In vitro methods and tests</topic><topic>Indicators</topic><topic>Macular degeneration</topic><topic>Media</topic><topic>Medicine and Health Sciences</topic><topic>Monoclonal antibodies</topic><topic>mRNA</topic><topic>Oxidative stress</topic><topic>Physical Sciences</topic><topic>Physiological aspects</topic><topic>Polymerase chain reaction</topic><topic>Proteins</topic><topic>Real time</topic><topic>Research and Analysis Methods</topic><topic>Retina</topic><topic>Retinal pigment epithelium</topic><topic>Retinal Pigment Epithelium - 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Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Park, Joo-Hee</au><au>Kim, Moosang</au><au>Oh, Jong-Hyun</au><au>Pizzo, Salvatore V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of bevacizumab on endoplasmic reticulum stress in hypoxic retinal pigment epithelial cells</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2017-06-07</date><risdate>2017</risdate><volume>12</volume><issue>6</issue><spage>e0179048</spage><epage>e0179048</epage><pages>e0179048-e0179048</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>To investigate the effects of bevacizumab on endoplasmic reticulum (ER) stress in human retinal pigment epithelial (RPE) cells cultured under hypoxic conditions. RPE cells (ARPE-19) were cultured under hypoxic conditions (1% O2) with or without bevacizumab (0.3125 mg/mL) for 24 and 48 h. Cell viability was measured by a PrestoBlue assay. The expression of vascular endothelial growth factor (VEGF), binding protein/glucose-regulated protein 78 (BiP/GRP78), and C/EBP homologous protein-10 (CHOP) mRNA was measured by quantitative real-time polymerase chain reaction (qRT-PCR). BiP/GRP78 and CHOP protein levels in the cells were assessed by western blot. VEGF protein in the media was quantified by enzyme-linked immunosorbent assay (ELISA). Under hypoxic conditions, cell viability decreased and mRNA and protein levels of VEGF, BiP/GRP78, and CHOP increased compared to those under normoxic conditions. Bevacizumab improved cell viability and reduced the expression of VEGF mRNA under hypoxic conditions. Bevacizumab also reduced the expression of both mRNA and protein of two ER stress indicators, BiP/GRP78 and CHOP, under hypoxic conditions. Bevacizumab mitigated ER stress in human RPE cells cultured under hypoxic conditions. This effect may be involved in the improved cell viability and reduction of VEGF expression after bevacizumab treatment of hypoxic RPE cells in vitro. However, the effects of bevacizumab on RPE cells under experimental conditions are unlikely to be clinically equivalent to those in the human eye.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>28591217</pmid><doi>10.1371/journal.pone.0179048</doi><tpages>e0179048</tpages><orcidid>https://orcid.org/0000-0002-5658-7635</orcidid><oa>free_for_read</oa></addata></record>
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subjects Age
Angiogenesis
Anoxia
Apoptosis
Assaying
Bevacizumab
Bevacizumab - administration & dosage
Biology and Life Sciences
Carrier Proteins
CCAAT/enhancer-binding protein
Cell Survival - drug effects
Cells, Cultured - drug effects
CHOP protein
Complications and side effects
Dosage and administration
Endoplasmic reticulum
Endoplasmic Reticulum Stress - drug effects
Endoplasmic Reticulum Stress - genetics
Enzyme-linked immunosorbent assay
Equivalence
Experiments
Eye
Gene expression
Gene Expression Regulation - drug effects
Genetic aspects
Glucose
Heat-Shock Proteins - biosynthesis
Homeostasis
Homology
Humans
Hypoxia
Immunotherapy
In vitro methods and tests
Indicators
Macular degeneration
Media
Medicine and Health Sciences
Monoclonal antibodies
mRNA
Oxidative stress
Physical Sciences
Physiological aspects
Polymerase chain reaction
Proteins
Real time
Research and Analysis Methods
Retina
Retinal pigment epithelium
Retinal Pigment Epithelium - drug effects
Retinal Pigment Epithelium - metabolism
Retinal Pigments - metabolism
Rodents
Stresses
Time measurement
Transcription Factor CHOP - biosynthesis
Vascular endothelial growth factor
Vascular Endothelial Growth Factor A - biosynthesis
title Effects of bevacizumab on endoplasmic reticulum stress in hypoxic retinal pigment epithelial cells
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