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ANGPTL8 promotes the ability of ANGPTL3 to bind and inhibit lipoprotein lipase
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In vitro, ANGPTL3-ANGPTL8 complexes inhibit LPL orders of magnitude better than either ANGPTL3 or ANGPTL8 alone.
“in vitro several studies have found that the ability of ANGPTL3-ANGPTL8 complexes to inhibit LPL is orders of magnitude better than that of either ANGPTL3 or ANGPTL8 alone (54, 115, 137, 138)”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
The Results section (‘ANGPTL8 promotes the inhibitory efficiency of ANGPTL3’; page unavailable) reports that co-expressed ANGPTL3 and ANGPTL8 significantly inhibited LPL where either protein alone had little effect. The Abstract Results likewise describes a dramatically increased inhibitory ability, but our copy does not establish the claimed ‘orders of magnitude’ difference. (LLM, conf=0.85)
Experimental — accuracy not yet measuredOverexpression of ANGPTL8 in the absence of ANGPTL3, or vice versa, has limited ability to increase plasma triglycerides.
“overexpression of ANGPTL8 in the absence of ANGPTL3, or vice versa, has limited ability to increase plasma triglycerides (19, 115, 137)”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
More recent studies have shown that ANGPTL3 forms a complex with ANGPTL8 and that this complex is most likely the physiologically relevant LPL inhibitor.
“As discussed below, more recent studies have shown that ANGPTL3 forms of complex with ANGPTL8 and that this complex is most likely the physiologically relevant LPL inhibitor (19, 54, 115, 137, 138).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
GPIHBP1 protects LPL from ANGPTL3 inhibition as does heparin.
“LPL’s endothelial cell receptor GPIHBP1 protects LPL from ANGPTL3 inhibition as does heparin (60, 115).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
Complex formation is necessary for efficient secretion of ANGPTL8.
“Complex formation is necessary for efficient secretion of ANGPTL8 (115)”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
ANGPTL8 does not inhibit LPL on its own.
“Although ANGPTL8 was initially reported to inhibit LPL on its own (35), later studies found that this not to be the case (115, 137, 138).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
Complex formation appears to require intracellular co-folding.
“and appears to require intracellular co-folding, as mixing ANGPTL3 and ANGPTL8 outside the cell does not result in complex formation (115, 138).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
Most studies showing ANGPTL3-mediated LPL inhibition in vitro required supraphysiological concentrations of ANGPTL3 to achieve significant inhibition.
“and most of the studies showing that ANGPTL3-mediated LPL inhibition in vitro required supraphysiological concentrations of ANGPTL3 to achieve significant inhibition (60, 105, 107, 115).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
In vitro studies of the effect of cleavage on ANGPTL3-mediated inhibition have reported increased inhibition, decreased inhibition, and no effect on inhibition.
“In vitro studies of the effect of cleavage on ANGPTL3-mediated inhibition have reported increased inhibition, decreased inhibition, and no effect on inhibition (107, 115, 124).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
Circulating levels of ANGPTL3 are relatively constant across feeding states.
“circulating levels of ANGPTL3 are relatively constant across feeding states (72, 106, 115).”
From Regulation of lipoprotein metabolism by ANGPTL3, ANGPTL4, and ANGPTL8 (2021) · cites this paper as [115]
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Citations
Cites
Triglycerides and Cardiovascular Disease: A Scientific Statement From the American Heart Association
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Genetic and Pharmacologic Inactivation of ANGPTL3 and Cardiovascular Disease
Dewey, F. E., Gusarova, V., Dunbar, R. L., O’Dushlaine, C., Schurmann, C., Gottesman, O., McCarthy, S., Van Hout, C. V., Bruse, S., Dansky, H. M., et al. (2017) · New England Journal of Medicine · doi:10.1056/nejmoa1612790 · Cited by 885
Self-citationCardiovascular and Metabolic Effects of ANGPTL3 Antisense Oligonucleotides
Graham, M. J., Lee, R. G., Brandt, T. A., Tai, L.-J., Fu, W., Peralta, R., Yu, R., Hurh, E., Paz, E., McEvoy, B. W., et al. (2017) · New England Journal of Medicine · doi:10.1056/nejmoa1701329 · Cited by 573
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“Based on our inhibition data, these concentrations of ANGPTL3 would have minimal impact on LPL activity, yet ANGPTL3-deficient mice clearly have reduced plasma triglyceride levels and increased LPL activity [10,11,14].”
BackgroundANGPTL8/Betatrophin Does Not Control Pancreatic Beta Cell Expansion
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Identification of a mammalian angiopoietin-related protein expressed specifically in liver
Conklin, D., Gilbertson, D., Taft, D. W., Maurer, M. F., Whitmore, T. E., Smith, D. L., Walker, K. M., Chen, L. H., Wattler, S., Nehls, M., et al. (1999) · Genomics · doi:10.1006/geno.1999.6041 · Cited by 169
Angptl3-null Mice Show Low Plasma Lipid Concentrations by Enhanced Lipoprotein Lipase Activity
FUJIMOTO, K., KOISHI, R., SHIMIZUGAWA, T., & ANDO, Y. (2006) · Experimental Animals · doi:10.1538/expanim.55.27 · Cited by 104
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Self-citation
Metadata
- Authors
- Chi, X., Britt, E. C., Shows, H. W., Hjelmaas, A. J., Shetty, S. K., Cushing, E. M., Li, W., Dou, A., Zhang, R., & Davies, B. S. J.
- Venue
- Molecular Metabolism
- Publisher
- Elsevier BV
- Published
- 2017-10
- Volume
- 6
- Issue
- 10
- Pages
- 1137-1149
- ISSN
- 2212-8778
- PMC
- PMC5641604
- Cited by
- 174
- References
- 8
- Language
- en
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