Carine Nzirorera's research while affiliated with Dalhousie University and other places
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Publications (6)
Autotaxin (ATX) is an adipokine that generates the bioactive lipid, lysophosphatidic acid (LPA). ATX-LPA signaling has been implicated in diet-induced obesity and systemic insulin resistance. However, it remains unclear whether the ATX-LPA pathway influences insulin function and energy metabolism in target tissues, particularly skeletal muscle, the...
Assessment of insulin resistance in HL-1 cardiomyocytes and 3T3-L1 adipocytes.
A) Immunoblot and B) densitometric analysis of Akt phosphorylation at Ser473 in HL-1 cells incubated in the absence or presence of 1.2 mM palmitate for 18 h, followed by incubation in the presence or absence or 100 nM insulin for 15 min (n = 3). A) Immunoblot and C) dens...
Background
Lysophosphatidic acid (LPA) receptor signaling has been implicated in cardiovascular and obesity-related metabolic disease. However, the distribution and regulation of LPA receptors in the myocardium and adipose tissue remain unclear.
Objectives
This study aimed to characterize the mRNA expression of LPA receptors (LPA1-6) in the murine...
The heart balances uptake, metabolism and oxidation of fatty acids (FAs) to maintain ATP production, membrane biosynthesis and lipid signaling. Under conditions where FA uptake outpaces FA oxidation and FA sequestration as triacylglycerols in lipid droplets, toxic FA metabolites such as ceramides, diacylglycerols, long-chain acyl-CoAs, and acylcarn...
Citations
... Accordingly, when samples collected for LPA measurement include active inhibition of both LPA production and degradation it appears the plasma from healthy individuals harbor on the order of 50 nM LPA. 3,36,37 However, systemic levels of extracellular LPA and autotaxin (ATX), the enzyme predominantly responsible for extracellularly produced LPA, are often found significantly elevated in human chronic inflammatory disorders such as chronic viral (HCV, HBV, and EBV) infections 38-41 autoimmune diseases, [42][43][44] obesity, [45][46][47][48][49][50][51][52] and a number of diverse cancers. [53][54][55][56][57][58][59][60] In these settings, serum LPA levels are considerably heightened (~twofold to 10-fold) compared to healthy individuals and concentrations over 50 μM have been reported in malignant effusions of ovarian cancer patients. ...
... LPA, is a phospholipid having a key role in directing several cellular processes such as survival, proliferation, differentiation, motility and its increased levels have been detected in RA. LPA binds to known G-protein coupled receptors (GPCRs) to execute a broad range of biological functions including its role in CVDs 28 . In chronic inflammatory arthritic condition, LPA receptor signalling may promote atherosclerosis development. ...
... Cycling conditions were set at 95 °C for 10 min, followed by 40 cycles at 95 °C for 15 s and 60 °C for 1 min. All real-time PCR data were normalized to the housekeeping gene RPL 41 [18] using a standard curve. ...
... 3. Under controlled conditions, the heart balances fatty acid uptake, metabolism, and oxidation to maintain energy generation, membrane biosynthesis, and lipid signaling [8] . ...