Hyaluronan export through plasma membranes depends on concurrent K+ efflux by K(ir) channels.
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Hyaluronan export through plasma membranes depends on concurrent K+ efflux by K(ir) channels. / Hagenfeld, Daniel; Borkenhagen, Beatrice; Schulz, Tobias; Schillers, Hermann; Schumacher, Udo; Prehm, Peter.
In: PLOS ONE, Vol. 7, No. 6, 6, 2012, p. 39096.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Hyaluronan export through plasma membranes depends on concurrent K+ efflux by K(ir) channels.
AU - Hagenfeld, Daniel
AU - Borkenhagen, Beatrice
AU - Schulz, Tobias
AU - Schillers, Hermann
AU - Schumacher, Udo
AU - Prehm, Peter
PY - 2012
Y1 - 2012
N2 - Hyaluronan is synthesized within the cytoplasm and exported into the extracellular matrix through the cell membrane of fibroblasts by the MRP5 transporter. In order to meet the law of electroneutrality, a cation is required to neutralize the emerging negative hyaluronan charges. As we previously observed an inhibiting of hyaluronan export by inhibitors of K(+) channels, hyaluronan export was now analysed by simultaneously measuring membrane potential in the presence of drugs. This was done by both hyaluronan import into inside-out vesicles and by inhibition with antisense siRNA. Hyaluronan export from fibroblast was particularly inhibited by glibenclamide, ropivacain and BaCl(2) which all belong to ATP-sensitive inwardly-rectifying K(ir) channel inhibitors. Import of hyaluronan into vesicles was activated by 150 mM KCl and this activation was abolished by ATP. siRNA for the K(+) channels K(ir)3.4 and K(ir)6.2 inhibited hyaluronan export. Collectively, these results indicated that hyaluronan export depends on concurrent K(+) efflux.
AB - Hyaluronan is synthesized within the cytoplasm and exported into the extracellular matrix through the cell membrane of fibroblasts by the MRP5 transporter. In order to meet the law of electroneutrality, a cation is required to neutralize the emerging negative hyaluronan charges. As we previously observed an inhibiting of hyaluronan export by inhibitors of K(+) channels, hyaluronan export was now analysed by simultaneously measuring membrane potential in the presence of drugs. This was done by both hyaluronan import into inside-out vesicles and by inhibition with antisense siRNA. Hyaluronan export from fibroblast was particularly inhibited by glibenclamide, ropivacain and BaCl(2) which all belong to ATP-sensitive inwardly-rectifying K(ir) channel inhibitors. Import of hyaluronan into vesicles was activated by 150 mM KCl and this activation was abolished by ATP. siRNA for the K(+) channels K(ir)3.4 and K(ir)6.2 inhibited hyaluronan export. Collectively, these results indicated that hyaluronan export depends on concurrent K(+) efflux.
KW - Humans
KW - Reverse Transcriptase Polymerase Chain Reaction
KW - Cell Line, Tumor
KW - Fibroblasts
KW - DNA Primers/genetics
KW - Cell Membrane/metabolism
KW - RNA, Small Interfering/genetics
KW - Membrane Potentials/physiology
KW - Potassium/metabolism
KW - Amides/pharmacology
KW - Barium Compounds/pharmacology
KW - Biological Transport/drug effects/physiology
KW - Chlorides/pharmacology
KW - Glucuronosyltransferase/metabolism
KW - Glyburide/pharmacology
KW - Hyaluronic Acid/metabolism
KW - Potassium Channels, Inwardly Rectifying/antagonists & inhibitors/metabolism
KW - Potassium Chloride
KW - RNA, Antisense/pharmacology
KW - Transport Vesicles/metabolism
KW - Humans
KW - Reverse Transcriptase Polymerase Chain Reaction
KW - Cell Line, Tumor
KW - Fibroblasts
KW - DNA Primers/genetics
KW - Cell Membrane/metabolism
KW - RNA, Small Interfering/genetics
KW - Membrane Potentials/physiology
KW - Potassium/metabolism
KW - Amides/pharmacology
KW - Barium Compounds/pharmacology
KW - Biological Transport/drug effects/physiology
KW - Chlorides/pharmacology
KW - Glucuronosyltransferase/metabolism
KW - Glyburide/pharmacology
KW - Hyaluronic Acid/metabolism
KW - Potassium Channels, Inwardly Rectifying/antagonists & inhibitors/metabolism
KW - Potassium Chloride
KW - RNA, Antisense/pharmacology
KW - Transport Vesicles/metabolism
U2 - 10.1371/journal.pone.0039096
DO - 10.1371/journal.pone.0039096
M3 - SCORING: Journal article
VL - 7
SP - 39096
JO - PLOS ONE
JF - PLOS ONE
SN - 1932-6203
IS - 6
M1 - 6
ER -