Regulation of cardiac metabolism and function by lipogenic factors
Journal Title: Advances in Hygiene and Experimental Medicine - Year 2016, Vol 70, Issue
Abstract
The heart has a limited capacity for lipogenesis and de novo lipid synthesis. However, expression of lipogenic genes in cardiomyocytes is unexpectedly high. Recent studies showed that lipogenic genes are important factors regulating cardiac metabolism and function. Long chain fatty acids are a major source of ATP required for proper heart function, and under aerobic conditions, the heart derives 60-90% of the energy necessary for contractile function from fatty acid oxidation. On the other hand, cardiac lipid over-accumulation (e.g. ceramides, diacylglycerols) leads to heart dysfunction. Downregulation of the lipogenic genes’ expression (e.g. sterol regulatory element binding protein 1, stearoyl-CoA desaturase, acetyl-CoA kwacarboxylase) decreased heart steatosis and cardiomyocyte apoptosis, improving systolic and diastolic function of the left ventricle. Lipogenic factors also regulate fatty acids and glucose utilization in the heart, underlining their important role in maintaining energetic homeostasis in pathological states. Fatty acid synthase, the enzyme catalyzing fatty acids de novo synthesis, affects cardiac calcium signaling through regulation of L-type calcium channel activity. Thus, a growing body of evidence suggests that the role of lipogenic genes in cardiomyocytes may be distinct from other tissues. Here, we review recent advances made in understanding the role of lipogenic genes in the control of heart metabolism and its involvement in the pathogenesis of lipotoxic cardiomyopathy.
Authors and Affiliations
Tomasz Bednarski, Aleksandra Pyrkowska, Agnieszka Opasińska, Paweł Dobrzyń
Działanie antyoksydacyjne i przeciwzapalne kwasu liponowego w wątrobie szczura
Wpływ polimorfizmów genu IL18 na stężenie mRNA oraz wydzielanie interleukiny 18 przez jednojądrzaste komórki krwi obwodowej
IL-18 jest plejotropową cytokiną odgrywającą istotną rolę w modulowaniu odpowiedzi immunologicznej i w patogenezie wielu schorzeń o podłożu zapalnym. W pracy opisano związek między 7 jednonukleotydowymi polimorfizmami w...
Breast cancer metastasis – insight into selected molecular mechanisms of the phenomenon
Metastasis is a complex, multistep biological process, involving a multitude of genes and biomolecules. Despite the successful therapeutic management of breast cancer, including surgery, chemotherapy and radiation therap...
Genetic and psychosocial factors for benzodiazepine addiction. An analysis based on the results of the authors’ own research conducted in a group of benzodiazepine addicted and non-addicted individuals
Purpose: In spite of the fact that the addictive potential of benzodiazepine (BDZ) drugs has been known for a long time, benzodiazepine addiction remains a common problem for psychiatry to deal with. The etiology of benz...
Aktywność antybakteryjna wybranych szczepów wzorcowych bakterii kwasu mlekowego produkujących bakteriocyny – badania wstępne
Wstęp: W pracy podjęto próbę oceny antybakteryjnego potencjału szczepów wzorcowych bakterii kwasu mlekowego (lactic acid bacteria – LAB) wytwarzających bakteriocyny różnych klas, a tym samym wykazujących różne mechanizmy...