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Cell-mediated cytotoxicity surrounding the brain in spinal muscular atrophy

ABSTRACT: Cell-mediated cytotoxicity surrounding the brain in spinal muscular atrophy

PROVIDER: PRJNA971910 | ENA |

REPOSITORIES: ENA

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Cell-mediated cytotoxicity surrounding the brain in spinal muscular atrophy

Project description:We here longitudinally investigated how spinal muscular atrophy (SMA) and nusinersen shaped local immune responses in the cerebrospinal fluid (CSF).

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Project description:In this study, label-free quantitative proteomic analysis was performed using the Smn 2B/- mouse model to identify and investigate significant changes in protein abundance that may be related to the pathogenesis and neurodegeneration oberved in spinal muscular atrophy (SMA)

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SMN deficiency perturbs monoamine neurotransmitter metabolism in spinal muscular atrophy

Project description:<p>Beyond motor neuron degeneration, homozygous mutations in the survival motor neuron 1 (SMN1) gene cause multiorgan and metabolic defects in patients with spinal muscular atrophy (SMA). However, the precise biochemical features of these alterations and the age of onset in the brain and peripheral organs remain unclear. Using untargeted NMR-based metabolomics in SMA mice, we identify cerebral and hepatic abnormalities related to energy homeostasis pathways and amino acid metabolism, emerging already at postnatal day 3 (P3) in the liver. Through HPLC, we find that SMN deficiency induces a drop in cerebral norepinephrine levels in overt symptomatic SMA mice at P11, affecting the mRNA and protein expression of key genes regulating monoamine metabolism, including aromatic L-amino acid decarboxylase (AADC), dopamine beta-hydroxylase (DβH) and monoamine oxidase A (MAO-A). In support of the translational value of our preclinical observations, we also discovered that SMN upregulation increases cerebrospinal fluid norepinephrine concentration in Nusinersen-treated SMA1 patients. Our findings highlight a previously unrecognized harmful influence of low SMN levels on the expression of critical enzymes involved in monoamine metabolism, suggesting that SMN-inducing therapies may modulate catecholamine neurotransmission. These results may also be relevant for setting therapeutic approaches to counteract peripheral metabolic defects in SMA. </p>

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Gene Expression Analysis of spinal cord obtained from a mouse model of severe Spinal Muscular Atrophy (SMA)

Project description:Spinal Muscular Atrophy (SMA) is an autosomal recessive motor neuron disease and is the second most common genetic disorder leading to death in childhood. No effective therapy is currently available. It has been suggested that M-NM-2-lactam antibiotics such as ceftriaxone may offer neuroprotection in motoneuron disease. We investigated the therapeutic effect of ceftriaxone in a murine model of SMA. Microarray technology was used to assess the global gene expression profile of spinal cord obtained by ceftriaxone-treated and vehicle treated SMA mice. Comparative Gene Expression Analysis. The microarray data derived from three different groups: wildtype controls, transgenic SMA (vehicle treated) and ceftriaxone-treated SMA mice. Each population consists of four RNA profiling samples.

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