Adipose Triglyceride Lipase Deficiency Attenuates In Vitro Thrombus Formation without Affecting Platelet Activation and Bleeding In Vivo.


Journal

Cells
ISSN: 2073-4409
Titre abrégé: Cells
Pays: Switzerland
ID NLM: 101600052

Informations de publication

Date de publication:
01 03 2022
Historique:
received: 02 02 2022
revised: 24 02 2022
accepted: 25 02 2022
entrez: 10 3 2022
pubmed: 11 3 2022
medline: 12 4 2022
Statut: epublish

Résumé

According to genome-wide RNA sequencing data from human and mouse platelets, adipose triglyceride lipase (ATGL), the main lipase catalyzing triglyceride (TG) hydrolysis in cytosolic lipid droplets (LD) at neutral pH, is expressed in platelets. Currently, it is elusive to whether common lipolytic enzymes are involved in the degradation of TG in platelets. Since the consequences of ATGL deficiency in platelets are unknown, we used whole-body and platelet-specific (plat)Atgl-deficient (-/-) mice to investigate the loss of ATGL on platelet function. Our results showed that platelets accumulate only a few LD due to lack of ATGL. Stimulation with platelet-activating agonists resulted in comparable platelet activation in Atgl-/-, platAtgl-/-, and wild-type mice. Measurement of mitochondrial respiration revealed a decreased oxygen consumption rate in platelets from Atgl-/- but not from platAtgl-/- mice. Of note, global loss of ATGL was associated with an anti-thrombogenic phenotype, which was evident by reduced thrombus formation in collagen-coated channels in vitro despite unchanged bleeding and occlusion times in vivo. We conclude that genetic deletion of ATGL affects collagen-induced thrombosis without pathological bleeding and platelet activation.

Identifiants

pubmed: 35269472
pii: cells11050850
doi: 10.3390/cells11050850
pmc: PMC8908992
pii:
doi:

Substances chimiques

Triglycerides 0
Acyltransferases EC 2.3.-
Lipase EC 3.1.1.3
PNPLA2 protein, mouse EC 3.1.1.3

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Subventions

Organisme : Austrian Science Fund FWF
ID : P 30882
Pays : Austria
Organisme : Austrian Science Fund FWF
ID : W 1226
Pays : Austria

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Auteurs

Madeleine Goeritzer (M)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Stefanie Schlager (S)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.
AOP Orphan Pharmaceuticals GmbH, 1190 Vienna, Austria.

Katharina B Kuentzel (KB)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Nemanja Vujić (N)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Melanie Korbelius (M)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Silvia Rainer (S)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Dagmar Kolb (D)

Core Facility Ultrastructural Analysis, Medical University of Graz, 8010 Graz, Austria.
BioTechMed-Graz, 8010 Graz, Austria.

Marion Mussbacher (M)

Department of Pharmacology and Toxicology, University of Graz, 8010 Graz, Austria.

Manuel Salzmann (M)

Department of Internal Medicine II/Cardiology, Medical University of Vienna, 1190 Vienna, Austria.

Waltraud C Schrottmaier (WC)

Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, 1190 Vienna, Austria.

Alice Assinger (A)

Institute of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, 1190 Vienna, Austria.

Axel Schlagenhauf (A)

Department of General Pediatrics and Adolescent Medicine, Medical University of Graz, 8010 Graz, Austria.

Corina T Madreiter-Sokolowski (CT)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Sandra Blass (S)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.

Thomas O Eichmann (TO)

BioTechMed-Graz, 8010 Graz, Austria.
Institute of Molecular Biosciences, University of Graz, 8010 Graz, Austria.
Core Facility Mass Spectrometry, Medical University of Graz, 8010 Graz, Austria.

Wolfgang F Graier (WF)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.
BioTechMed-Graz, 8010 Graz, Austria.

Dagmar Kratky (D)

Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, 8010 Graz, Austria.
BioTechMed-Graz, 8010 Graz, Austria.

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Classifications MeSH