Percorrer por autor "Patti, Mary Elizabeth"
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- Editorial: tissue crosstalk in obesity and diabetes: a focus on skeletal musclePublication . De Sousa-Coelho, Ana Luísa; Estêvão, Maria Dulce da Mota Antunes de Oliveira ; Patti, Mary Elizabeth; Lerin, CarlesIn the complex biological system of higher organisms, the maintenance of metabolic homeostasis requires intricate crosstalk among different tissues and organs. Such inter-organ communication, including classical hormones, other peptides, and extracellular vesicles (EVs), allows one tissue to affect metabolic pathways in a distant tissue. Dysregulation of this communication contributes to human pathologies, including obesity, diabetes, liver diseases, and certain cancers. This Research Topic aimed to shed light onto the complex tissue crosstalk underlying metabolic diseases, specifically obesity and type 2 diabetes (T2D). It highlights the latest scientific evidence exploring such interactions among different tissues, with a specific focus on the role of skeletal muscle and its secretion of myokines and EVs that contribute to the regulation of metabolism in liver, adipose tissue, and other organs.
- Skeletal muscle expression of adipose-specific phospholipase in peripheral artery diseasePublication . Parmer, Caitlin; De Sousa-Coelho, Ana Luísa; Cheng, Henry S.; Daher, Grace; Burkart, Alison; Dreyfuss, Jonathan M.; Pan, Hui; Prenner, Joshua C.; Keilson, Jessica M.; Pande, Reena; Henkin, Stanislav; Feinberg, Mark W.; Patti, Mary Elizabeth; Creager, Mark A.Flow-limiting atherosclerotic lesions of arteries supplying the limbs are a cause of symptoms in patients with peripheral artery disease (PAD). Musculoskeletal metabolic factors also contribute to the pathophysiology of claudication, which is manifest as leg discomfort that impairs walking capacity. Accordingly, we conducted a case-control study to determine whether skeletal muscle metabolic gene expression is altered in PAD. Calf skeletal muscle gene expression of patients with PAD and healthy subjects was analyzed using microarrays. The top-ranking gene differentially expressed between PAD and controls (FDR < 0.001) wasPLA2G16, which encodes adipose-specific phospholipase A2 (AdPLA) and is implicated in the maintenance of insulin sensitivity and regulation of lipid metabolism. Differential expression was confirmed by qRT-PCR;PLA2G16was downregulated by 68% in patients with PAD (p< 0.001). Expression ofPla2g16was then measured in control (db/+) and diabetic (db/db) mice that underwent unilateral femoral artery ligation. There was significantly reduced expression ofPla2g16in the ischemic leg of both control and diabetic mice (by 51%), with significantly greater magnitude of reduction in the diabetic mice (by 79%). We conclude that AdPLA is downregulated in humans with PAD and in mice with hindlimb ischemia. Reduced AdPLA may contribute to impaired walking capacity in patients with PAD via its effects on skeletal muscle metabolism. Further studies are needed to fully characterize the role of AdPLA in PAD and to investigate its potential as a therapeutic target for alleviating symptoms of claudication.