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Apolipoprotein M
Apolipoprotein M
- Article/chapterEnglish2004
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LIBRIS-ID:oai:lup.lub.lu.se:3f2a08dc-c286-4265-b6c7-de6c5ca0fac8
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https://lup.lub.lu.se/record/1129791URI
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https://doi.org/10.1186/1476-511X-3-21DOI
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Language:English
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Summary in:English
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Subject category:for swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Apolipoprotein M (apoM) is a 26-kDa protein that is mainly associated with high-density lipoprotein (HDL) in human plasma, with a small proportion present in triglyceride-rich lipoproteins (TGRLP) and low-density lipoproteins (LDL). Human apoM gene is located in p21.31 on chromosome 6 (chromosome 17, in mouse). Human apoM cDNA (734 base pairs) encodes 188-amino acid residue-long protein. It belongs to lipocalin protein superfamily. Human tissue expression array study indicates that apoM is only expressed in liver and in kidney and small amounts are found in fetal liver and kidney. In situ apoM mRNA hybridization demonstrates that apoM is exclusively expressed in the hepatocytes and in the tubule epithelial cells in kidney. Expression of apoM could be regulated by platelet activating factor (PAF), transforming growth factors (TGF), insulin-like growth factor (IGF) and leptin in vivo and/or in vitro. It has been demonstrated that apoM expression is dramatically decreased in apoA-I deficient mouse. Hepatocyte nuclear factor-1alpha (HNF-1alpha) is an activator of apoM gene promoter. Deficiency of HNF-1alpha mouse shows lack of apoM expression. Mutations in HNF-1alpha (MODY3) have reduced serum apoM levels. Expression of apoM is significantly decreased in leptin deficient (ob/ob) mouse or leptin receptor deficient (db/db) mouse. ApoM concentration in plasma is positively correlated to leptin level in obese subjects. These may suggest that apoM is related to the initiation and progression of MODY3 and/or obesity.
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Zhang, Xiaoying
(author)
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Nilsson-Ehle, PeterLund University,Lunds universitet,Avdelningen för klinisk kemi och farmakologi,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Chemistry and Pharmacology,Department of Laboratory Medicine,Faculty of Medicine(Swepub:lu)kkem-pne
(author)
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Xu, NingLund University,Lunds universitet,Avdelningen för klinisk kemi och farmakologi,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Clinical Chemistry and Pharmacology,Department of Laboratory Medicine,Faculty of Medicine(Swepub:lu)kkem-nxu
(author)
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Avdelningen för klinisk kemi och farmakologiInstitutionen för laboratoriemedicin
(creator_code:org_t)
Related titles
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In:Lipids in Health and Disease31476-511X
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