Publications by authors named "Youssef Mallat"

Schwannoma are tumors of Schwann cells of the peripheral nerve sheath. Sacral location is rarely reported especially in spondyloarthritis patients. Herein, we report a case of uncommon pygalgia in a 25-year-old man with history of a non-radiographic axial spondyloarthritis and in whom the diagnosis of sacral Schwannoma was established.

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Introduction: Bone hydatidosis is a rare disease. It is characterised by discreet and nonspecific symptomatology that makes the diagnosis late and the treatment difficult to manage.

Presentation Of Case: We report the case of a 29-year-old woman hospitalised for right hip pain with a lytic image well limited in the upper extremity of the right femur.

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Article Synopsis
  • MicroRNAs, specifically miR-378 and miR-378*, are significant in regulating gene expression and are found in the Ppargc1b gene, which influences energy balance and mitochondrial function in cardiac cells.
  • Research used proteomic screening to identify that overexpression of these miRs results in the down-regulation of 86 proteins, affecting vital pathways related to energy metabolism and muscle function in cardiomyocytes.
  • Validation of certain targets revealed that miR-378 affects lactate dehydrogenase A, influencing cell growth, while miR-378* targets cytoskeletal proteins, linking energy metabolism, cytoskeleton dynamics, and endoplasmic reticulum function through post-transcriptional regulation.
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Aims: The expression of the sodium/calcium exchanger NCX1 increases during cardiac hypertrophy and heart failure, playing an important role in Ca(2+) extrusion. This increase is presumed to result from stress signalling induced changes in the interplay between transcriptional and post-transcriptional regulations. We aimed to determine the impact of the SRF transcription factor known to regulate the NCX1 promoter and microRNA genes, on the expression of NCX1 mRNA and protein and annexin A5 (AnxA5), a Ca(2+)-binding protein interacting with NCX1 and increased during HF.

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Alterations in the balance of cytoskeleton as well as energetic proteins are involved in the cardiac remodeling occurring in dilated cardiomyopathy (DCM). We used two-dimensional DIGE proteomics as a discovery approach to identify key molecular changes taking place in a temporally controlled model of DCM triggered by cardiomyocyte-specific serum response factor (SRF) knock-out in mice. We identified muscle creatine kinase (MCK) as the primary down-regulated protein followed by α-actin and α-tropomyosin down-regulation leading to a decrease of polymerized F-actin.

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