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The PNPLA3-I148M va...
The PNPLA3-I148M variant increases polyunsaturated triglycerides in human adipose tissue
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- Qadri, Sami (författare)
- Department of Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Minerva Foundation Institute for Medical Research, Helsinki, Finland,Helsinki University Central Hospital
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- Lallukka-Brück, Susanna (författare)
- Department of Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Minerva Foundation Institute for Medical Research, Helsinki, Finland,Helsinki University Central Hospital
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- Luukkonen, Panu K. (författare)
- Department of Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Minerva Foundation Institute for Medical Research, Helsinki, Finland,Helsinki University Central Hospital
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- Zhou, You (författare)
- Minerva Foundation Institute for Medical Research, Helsinki, Finland; Systems Immunity University Research Institute and Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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- Gastaldelli, Amalia (författare)
- Institute of Clinical Physiology, National Research Council, Pisa, Italy,CNR Institute of Clinical Physiology (IFC-CNR)
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- Orho-Melander, Marju (författare)
- Lund University,Lunds universitet,Diabetes - kardiovaskulär sjukdom,Forskargrupper vid Lunds universitet,Diabetes - Cardiovascular Disease,Lund University Research Groups
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- Sammalkorpi, Henna (författare)
- Department of Gastrointestinal Surgery, Helsinki University Hospital, Abdominal Center, Helsinki, Finland,Helsinki University Central Hospital
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- Juuti, Anne (författare)
- Department of Gastrointestinal Surgery, Helsinki University Hospital, Abdominal Center, Helsinki, Finland,Helsinki University Central Hospital
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- Penttilä, Anne K. (författare)
- Department of Gastrointestinal Surgery, Helsinki University Hospital, Abdominal Center, Helsinki, Finland,Helsinki University Central Hospital
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- Perttilä, Julia (författare)
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
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- Hakkarainen, Antti (författare)
- HUS Medical Imaging Center, Helsinki University Hospital, Helsinki, Finland,Helsinki University Central Hospital
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- Lehtimäki, Tiina E. (författare)
- HUS Medical Imaging Center, Helsinki University Hospital, Helsinki, Finland,Helsinki University Central Hospital
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- Oresic, Matej, 1967- (författare)
- Örebro University,Örebro universitet,Institutionen för medicinska vetenskaper
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- Hyötyläinen, Tuulia, 1971- (författare)
- Örebro University,Örebro universitet,Institutionen för naturvetenskap och teknik
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- Hodson, Leanne (författare)
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford and National Institute for Health Research Oxford Biomedical Research Centre, Oxford University Hospitals Foundation Trust, Oxford, United Kingdom
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- Olkkonen, Vesa M. (författare)
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
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- Yki-Järvinen, Hannele (författare)
- Department of Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland; Minerva Foundation Institute for Medical Research, Helsinki, Finland,Helsinki University Central Hospital
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(creator_code:org_t)
- 2020-05-18
- 2020
- Engelska.
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Ingår i: Liver international (Print). - : Wiley-Blackwell Publishing Inc.. - 1478-3223 .- 1478-3231. ; 40:9, s. 2128-2138
- Relaterad länk:
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https://doi.org/10.1...
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https://onlinelibrar...
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http://dx.doi.org/10... (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- BACKGROUND & AIMS: The I148M variant in PNPLA3 is the major genetic risk factor for non-alcoholic fatty liver disease (NAFLD). The liver is enriched with polyunsaturated triglycerides (PUFA-TGs) in PNPLA3-I148M carriers. Gene expression data indicate that PNPLA3 is liver-specific in humans, but whether it functions in adipose tissue (AT) is unknown. We investigated whether PNPLA3-I148M modifies AT metabolism in human NAFLD.METHODS: Profiling of the AT lipidome and fasting serum non-esterified fatty acid (NEFA) composition were conducted in 125 volunteers (PNPLA3148MM/MI , n=63; PNPLA3148II , n=62). AT fatty acid composition was determined in 50 volunteers homozygous for the variant (PNPLA3148MM , n=25) or lacking the variant (PNPLA3148II , n=25). Whole-body insulin sensitivity of lipolysis was determined using [2 H5 ]glycerol, and PNPLA3 mRNA and protein levels were measured in subcutaneous AT and liver biopsies in a subset of the volunteers.RESULTS: PUFA-TGs were significantly increased in AT in carriers versus non-carriers of PNPLA3-I148M. The variant did not alter the rate of lipolysis or the composition of fasting serum NEFAs. PNPLA3 mRNA was 33-fold higher in the liver than in AT (p<0.0001). In contrast, PNPLA3 protein levels per tissue protein were 3-fold higher in AT than the liver (p<0.0001) and 9-fold higher when related to whole-body AT and liver tissue masses (p<0.0001).CONCLUSIONS: Contrary to previous assumptions, PNPLA3 is highly abundant in AT. PNPLA3-I148M locally remodels AT TGs to become polyunsaturated as it does in the liver, without affecting lipolysis or composition of serum NEFAs. Changes in AT metabolism do not contribute to NAFLD in PNPLA3-I148M carriers.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Gastroenterologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Gastroenterology and Hepatology (hsv//eng)
Nyckelord
- Adipose tissue
- fatty acids
- lipidomics
- lipolysis
- non-alcoholic fatty liver disease
- triglycerides
- adipose tissue
- fatty acids
- lipidomics
- lipolysis
- non-alcoholic fatty liver disease
- triglycerides
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Qadri, Sami
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Lallukka-Brück, ...
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Luukkonen, Panu ...
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Zhou, You
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Gastaldelli, Ama ...
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Orho-Melander, M ...
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Sammalkorpi, Hen ...
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Juuti, Anne
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Penttilä, Anne K ...
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Perttilä, Julia
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Hakkarainen, Ant ...
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Lehtimäki, Tiina ...
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Oresic, Matej, 1 ...
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Hyötyläinen, Tuu ...
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Hodson, Leanne
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Olkkonen, Vesa M ...
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Yki-Järvinen, Ha ...
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Liver internatio ...
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Örebro universitet
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Lunds universitet