Blood biomarker fingerprints in a cohort of patients with CHRNE-related congenital myasthenic syndrome
Mutations in CHRNE encoding the epsilon subunit of acetylcholine receptor result in impaired neuromuscular transmission and congenital myasthenic syndrome (CMS) with variying severity of symptoms. Although the pathophysiology is well-known, blood biomarker signatures enabling a patient-stratificatio...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
13 February 2025
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| In: |
Acta Neuropathologica Communications
Year: 2025, Jahrgang: 13, Pages: 1-20 |
| ISSN: | 2051-5960 |
| DOI: | 10.1186/s40478-025-01946-9 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1186/s40478-025-01946-9
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| Verfasserangaben: | Adela Della Marina, Andrie Koutsoulidou, Daniel Natera-de Benito, Lars-Oliver Tykocinski, Marios Tomazou, Kristia Georgiou, Andreas Laner, Heike Kölbel, Andres Nascimento, Carlos Ortez, Angela Abicht, Basant Kumar Thakur, Hanns Lochmüller, Leonidas A. Phylactou, Tobias Ruck, Ulrike Schara-Schmidt, Dipali Kale, Andreas Hentschel and Andreas Roos |
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| 245 | 1 | 0 | |a Blood biomarker fingerprints in a cohort of patients with CHRNE-related congenital myasthenic syndrome |c Adela Della Marina, Andrie Koutsoulidou, Daniel Natera-de Benito, Lars-Oliver Tykocinski, Marios Tomazou, Kristia Georgiou, Andreas Laner, Heike Kölbel, Andres Nascimento, Carlos Ortez, Angela Abicht, Basant Kumar Thakur, Hanns Lochmüller, Leonidas A. Phylactou, Tobias Ruck, Ulrike Schara-Schmidt, Dipali Kale, Andreas Hentschel and Andreas Roos |
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| 520 | |a Mutations in CHRNE encoding the epsilon subunit of acetylcholine receptor result in impaired neuromuscular transmission and congenital myasthenic syndrome (CMS) with variying severity of symptoms. Although the pathophysiology is well-known, blood biomarker signatures enabling a patient-stratification are lacking. This retrospective two-center-study includes 19 recessive CHRNE-patients (AChR deficiency; mean age 14.8 years) from 13 families which were clinically characterized according to disease severity. 15 patients were classified as mildly and 4 patients as moderate to severely affected. Seven known pathogenic and one unreported variant (c.1032 + 2_1032 + 3delinsGT) were identified. Biomarker discovery was carried out on blood samples: proteomics was performed on white blood cells (WBC; n = 12) and on extracellular vesicles (EV) purified from serum samples (n = 7) in addition to amino acid profiling (n = 9) and miRNA screening (n = 18). For miRNA studies, 7 patients with other CMS-subtypes were moreover included. WBC-proteomics unveiled a significant increase of 7 and a decrease of 36 proteins. In silico studies of these proteins indicated affection of secretory granules and the extracellular space. Comparison across patients unveiled increase of two vesicular transport proteins (SCAMP2 and SNX2) in severely affected patients and indeed EV-proteomics revealed increase of 7 and decrease of 13 proteins. Three of these proteins (TARSH, ATRN & PLEC) are known to be important for synaptogenesis and synaptic function. Metabolomics showed decrease of seven amino acids/ amino acid metabolites (aspartic and glutamic acids, phosphoserine, amino adipate, citrulline, ornithine, and 1-methyhistidine). miRNA-profiling showed increase miR − 483 − 3p, miR-365a-3p, miR − 365b − 3p and miR-99a, and decrease of miR-4433b-3p, miR-6873-3p, miR-182-5p and let-7b-5p in CHRNE-patients whereas a comparison with other CMS subtypes showed increase of miR − 205 − 5p, miR − 10b − 5p, miR-125a-5p, miR-499-5p, miR-3120-5p and miR − 483 − 5p and decrease of miR − 1290. Our combined data introduce a molecular fingerprint on protein, metabolic and miRNA level with some of those playing different roles along the neuromuscular axis. | ||
| 650 | 4 | |a CMS biomarkers | |
| 650 | 4 | |a CMS extracellular vesicles | |
| 650 | 4 | |a CMS metabolites | |
| 650 | 4 | |a CMS miRNA | |
| 650 | 4 | |a CMS white blood cells | |
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| 700 | 1 | |a Georgiou, Kristia |e VerfasserIn |4 aut | |
| 700 | 1 | |a Laner, Andreas |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Ortez, Carlos |e VerfasserIn |4 aut | |
| 700 | 1 | |a Abicht, Angela |e VerfasserIn |4 aut | |
| 700 | 1 | |a Thakur, Basant Kumar |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lochmüller, Hanns |e VerfasserIn |4 aut | |
| 700 | 1 | |a Phylactou, Leonidas A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ruck, Tobias |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schara-Schmidt, Ulrike |e VerfasserIn |4 aut | |
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