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Cholesterol depleti...
Cholesterol depletion impairs vascular reactivity to endothelin-1 by reducing store-operated Ca2+ entry dependent on TRPC1.
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- Bergdahl, Andreas (författare)
- Lund University,Lunds universitet,Kärlfysiologi,Forskargrupper vid Lunds universitet,Vascular Physiology,Lund University Research Groups
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- Gomez, Maria (författare)
- Lund University,Lunds universitet,Kärlfysiologi,Forskargrupper vid Lunds universitet,Kardiovaskulär forskning - immunitet och ateroskleros,Vascular Physiology,Lund University Research Groups,Cardiovascular Research - Immunity and Atherosclerosis
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- Dreja, Karl (författare)
- Lund University,Lunds universitet,Kärlfysiologi,Forskargrupper vid Lunds universitet,Institutionen för kliniska vetenskaper, Malmö,Medicinska fakulteten,Vascular Physiology,Lund University Research Groups,Department of Clinical Sciences, Malmö,Faculty of Medicine
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Xu, Shang-Zhong (författare)
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- Adner, Mikael (författare)
- Lund University,Lunds universitet,Klinisk och experimentell allergiforskning,Laryngoesofagologi, allergi och livskvalitet,Forskargrupper vid Lunds universitet,Clinical and Experimental Allergy Research,Laryngoesophagology, Allergy and Life Quality,Lund University Research Groups
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Beech, David J (författare)
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- Broman, Jonas (författare)
- Lund University,Lunds universitet,Neurofysiologi,Forskargrupper vid Lunds universitet,Neurophysiology,Lund University Research Groups
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- Hellstrand, Per (författare)
- Lund University,Lunds universitet,Kärlfysiologi,Forskargrupper vid Lunds universitet,Vascular Physiology,Lund University Research Groups
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- Swärd, Karl (författare)
- Lund University,Lunds universitet,Kärlfysiologi,Forskargrupper vid Lunds universitet,Vascular Physiology,Lund University Research Groups
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(creator_code:org_t)
- 2003
- 2003
- Engelska.
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Ingår i: Circulation Research. - 0009-7330. ; 93:9, s. 839-847
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The reactivity of the vascular wall to endothelin-1 (ET-1) is influenced by cholesterol, which is of possible importance for the progression of atherosclerosis. To elucidate signaling steps affected, the cholesterol acceptor methyl-ß-cyclodextrin (mßcd, 10 mmol/L) was used to manipulate membrane cholesterol and disrupt caveolae in intact rat arteries. In endothelium-denuded caudal artery, contractile responsiveness to 10 nmol/L ET-1 (mediated by the ETA receptor) was reduced by mßcd and increased by cholesterol. Neither ligand binding nor colocalization of ETA and caveolin-1 was affected by mßcd. Ca2+ inflow via store-operated channels after depletion of intracellular Ca2+ stores was reduced in mßcd-treated caudal arteries, as shown by Mn2+ quench rate and intracellular [Ca2+] response. Expression of TRPC1, 3, and 6 was detected by reverse transcriptase–polymerase chain reaction, and colocalization of TRPC1 with caveolin-1 was reduced by mßcd, as seen by immunofluorescence. Part of the contractile response to ET-1 was inhibited by Ni2+ (0.5 mmol/L) and by a TRPC1 blocking antibody. In the basilar artery, exhibiting less store-operated channel activity than the caudal artery, ET-1–induced contractions were insensitive to the TRPC1 blocking antibody and to mßcd. Increased store-operated channel activity in basilar arteries after organ culture correlated with increased sensitivity of ET-1 contraction to mßcd. These results suggest that cholesterol influences vascular reactivity to ET-1 by affecting the caveolar localization of TRPC1.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
Nyckelord
- methyl-ß-cyclodextrin
- arterial smooth muscle
- endothelin
- caveolae
- store-operated Ca2+ channels
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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