Evidence map›Paper›PMID 10077655›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1999

Induced mutant mouse lines that express lipoprotein lipase in cardiac muscle, but not in skeletal muscle and adipose tissue, have normal plasma triglyceride and high-density lipoprotein-cholesterol levels.

S Levak-Frank, W Hofmann, P H Weinstock, H Radner, W Sattler, J L Breslow, R Zechner

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1999. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
4.0field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

29 citing papers in PubMed, 88 citations in OpenAlex.

  1. Review
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  4. Review
  5. Review
  6. CRISPR/Cas9-mediatedJournal of lipid research · 2018
    Article
  7. Article
  8. Review
  9. Article
  10. Lipid Use and Misuse by the Heart.Circulation research · 2016
    Review
  11. Article
  12. Article
  13. Article
  14. Review
  15. Triglycerides and heart disease: still a hypothesis?Arteriosclerosis, thrombosis, and vascular biology · 2011
    Review
  16. Comparative studies of vertebrate lipoprotein lipase: a key enzyme of very low density lipoprotein metabolism.Comparative biochemistry and physiology. Part D, Genomics & proteomics · 2011
    Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

S Levak-FrankSpezialforschungsbereich Biomembrane Research Center, Karl-Franzens University, A-8010 Graz, Austria.
W Hofmann
P H Weinstock
H Radner
W Sattler
J L Breslow
R Zechner
Rockefeller University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The tissue-specific expression of lipoprotein lipase (LPL) in adipose tissue (AT), skeletal muscle (SM), and cardiac muscle (CM) is rate-limiting for the uptake of triglyceride (TG)-derived free fatty acids and decisive in the regulation of energy balance and lipoprotein metabolism. To investigate the tissue-specific metabolic effects of LPL, three independent transgenic mouse lines were established that expressed a human LPL (hLPL) minigene predominantly in CM. Through cross-breeding with heterozygous LPL knockout mice, animals were generated that produced hLPL mRNA and enzyme activity in CM but lacked the enzyme in SM and AT because of the absence of the endogenous mouse LPL gene (L0-hLPL). LPL activity in CM and postheparin plasma of L0-hLPL mice was reduced by 34% and 60%, respectively, compared with control mice. This reduced LPL expression was sufficient to rescue LPL knockout mice from neonatal death. L0-hLPL animals developed normally with regard to body weight and body-mass composition. Plasma TG levels in L0-hLPL animals were increased up to 10-fold during the suckling period but normalized after weaning and decreased in adult animals. L0-hLPL mice had normal plasma high-density lipoprotein (HDL)-cholesterol levels, indicating that LPL expression in CM alone was sufficient to allow for normal HDL production. The absence of LPL in SM and AT did not cause detectable morphological or histopathological changes in these tissues. However, the lipid composition in AT and SM exhibited a marked decrease in polyunsaturated fatty acids. From this genetic model of LPL deficiency in SM and AT, it can be concluded that CM-specific LPL expression is a major determinant in the regulation of plasma TG and HDL-cholesterol levels.

Indexed as

Adipose TissueAnimalsBody WeightCholesterol, HDLDisease Models, AnimalGene Expression RegulationHumansLipoprotein LipaseMiceMice, Mutant StrainsMice, TransgenicMuscle, SkeletalMyocardiumOrgan SpecificityTransfectionTriglyceridesCholesterol, HDLLipoprotein LipaseTriglycerides

Identifiers

PMID10077655
PMCPMC15913
OpenAlexW2101553942

What OpenQuestion holds

Texttitle and abstract
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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.