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Discoidal HDL and a...
Discoidal HDL and apoA-I-derived peptides improve glucose uptake in skeletal muscle.
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- Dalla-Riva, Jonathan (författare)
- Lund University,Lunds universitet,Medicinsk proteinvetenskap,Forskargrupper vid Lunds universitet,Medical Protein Science,Lund University Research Groups
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- Stenkula, Karin (författare)
- Lund University,Lunds universitet,Medicinsk proteinvetenskap,Forskargrupper vid Lunds universitet,Medical Protein Science,Lund University Research Groups
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- Petrlova, Jitka (författare)
- Lund University,Lunds universitet,Medicinsk proteinvetenskap,Forskargrupper vid Lunds universitet,Medical Protein Science,Lund University Research Groups
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visa fler...
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- Lagerstedt, Jens (författare)
- Lund University,Lunds universitet,Medicinsk proteinvetenskap,Forskargrupper vid Lunds universitet,Medical Protein Science,Lund University Research Groups
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(creator_code:org_t)
- 2013
- 2013
- Engelska.
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Ingår i: Journal of Lipid Research. - 1539-7262. ; 54:5, s. 1275-1282
- Relaterad länk:
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https://portal.resea... (primary) (free)
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http://www.ncbi.nlm....
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http://dx.doi.org/10...
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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
- Lipid-free apoA-I and mature spherical HDL have been shown to induce glucose uptake in skeletal muscle. To exploit apoA-I and HDL states for diabetes therapy, further understanding of interaction between muscle and apoA-I is required. This study has examined if nascent discoidal HDL, in which apoA-I attains a different conformation from mature HDL and lipid-free states, could induce muscle glucose uptake and if a specific domain of apoA-I can mediate this effect. Using L6 myotubes stimulated with synthetic reconstituted discoidal HDL (rHDL), we show a glucose uptake effect comparable to insulin. Increased plasma membrane GLUT4 levels in ex vivo rHDL-stimulated myofibers from HA-GLUT4-GFP transgenic mice support this observation. rHDL increased phosphorylation of AMP kinase (AMPK) and acetyl-coA carboxylase (ACC) but not Akt. A survey of domain specific peptides of apoA-I showed that the lipid-free C-terminal 190-243 fragment increases plasma membrane GLUT4, promotes glucose uptake, and activates AMPK signaling but not Akt. This may be explained by changes in α-helical content of 190-243 fragment versus full-length lipid-free apoA-I as assessed by circular dichroism spectroscopy. JLR Discoidal HDL and the 190-243 peptide of apoA-I are potent agonists of glucose uptake in skeletal muscle and the C-terminal α-helical content of apoA-I may be an important determinant of this effect.
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
- art (ämneskategori)
- ref (ämneskategori)
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