STUDIO DELLE BASI GENETICHE E DEI MECCANISMI CHE CAUSANO LA MIOPATIA DEGLI AGGREGATI TUBULARI.
- 4 Anni 2020/2024
 - 383.184€ Totale Fondi
 
Lo "Store operated calcium entry" (SOCE) è un meccanismo per l’ingresso degli ioni calcio nelle cellule innescato dallo svuotamento dei depositi intracellulari (Reticolo Endoplasmatico o Sarcoplasmatico, ER and SR). SOCE opera il recupero di calcio extracellulare grazie all’interazione fra le due proteine STIM1 ed Orai1, ed è modulato nel muscolo dalla anche dalla Calsequestrina-1 (CASQ1). Mutazioni in STIM1, Orai1, e CASQ1 sono state identificate in pazienti affetti da Miopatia degli Aggregati Tubulari (TAM), una malattia che causa dolore muscolare, crampi, debolezza e porta in alcune persone a deformità articolari degli arti. I meccanismi che collegano le mutazioni nei geni sopra menzionati alla disfunzione di SOCE, ed allo sviluppo della miopatia TAM non sono chiari. L’incidenza di TAM nella popolazione è ancora sconosciuta e non è ancora disponibile alcuna cura per i pazienti. L’obiettivo principale di questo progetto è aumentare le conoscenze attuali della fisiopatologia della TAM. Per raggiungere questo obiettivo, abbiamo ora generato i primi modelli murini che presentano mutazioni umane in Orai1 (G98S) e in CASQ1 (D44N) legate a pazienti affetti da TAM. Abbiamo già collezionato Risultati Preliminari che stanno dimostrando come il topo Orai1-G98S sia buon modello animale per lo studio della TAM. Il lavoro proposto in questo progetto ha il potenziale di fornire le basi per il futuro sviluppo di interventi terapeutici. Questo progetto potrebbe potenzialmente identificare nuovi targets terapeutici per lo sviluppo di strategie finalizzate a migliorare la funzione muscolare, limitare la fatica muscolare, debolezza, e a disfunzione in varie miopatie umane causate dall’alterazione dell’omeostasi del Ca2+ (inclusa la TAM).
Pubblicazioni Scientifiche
- 2024-08-01 BIOMEDICINES 
Constitutive, Muscle-Specific Orai1 Knockout Results in the Incomplete Assembly of Ca2+ Entry Units and a Reduction in the Age-Dependent Formation of Tubular Aggregates
 - 2022-04-01 BIOMOLECULES 
The Sarcoplasmic Reticulum of Skeletal Muscle Cells: A Labyrinth of Membrane Contact Sites
 - 2022-11-01 CANCER IMMUNOLOGY RESEARCH 
A Population of TIM4+FOLR2+ Macrophages Localized in Tertiary Lymphoid Structures Correlates to an Active Immune Infiltrate Across Several Cancer Types
 - 2025-09-04 CELLS 
Voluntary Wheel Running Mitigates Disease in an Orai1 Gain-of-Function Mouse Model of Tubular Aggregate Myopathy
 - 2021-07-23 CIRCULATION RESEARCH 
Impaired Binding to Junctophilin-2 and Nanostructural Alteration in CPVT Mutation
 - 2023-02-01 CURRENT OPINION IN PHARMACOLOGY 
Store-operated calcium entry From physiology to tubular aggregate myopathy
 - 2024-12-02 EMBO JOURNAL 
An Orai1 gain-of-function tubular aggregate myopathy mouse model phenocopies key features of the human disease
 - 2022-08-01 EUROPEAN JOURNAL OF NEUROSCIENCE 
Ryanodine receptor 1 (RYR1) mutations in two patients with tubular aggregate myopathy
 - 2022-05-01 EXPERIMENTAL BIOLOGY AND MEDICINE 
Allele-specific silencing by RNAi of R92Q and R173W mutations in cardiac troponin T
 - 2021-06-01 FASEB JOURNAL 
Endothelial cells from umbilical cord of women affected by gestational diabetes: A suitable in vitro model to study mechanisms of early vascular senescence in diabetes
 - 2022-08-16 FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY 
Hyperactivation of Wnt/β-catenin and Jak/Stat3 pathways in human and zebrafish foetal growth restriction models: Implications for pharmacological rescue
 - 2021-01-05 FRONTIERS IN PHYSIOLOGY 
Long-Term Exercise Reduces Formation of Tubular Aggregates and Promotes Maintenance of Ca2+ Entry Units in Aged Muscle
 - 2022-10-12 FRONTIERS IN PHYSIOLOGY 
Ablation of Calsequestrin-1, Ca2+ unbalance, and susceptibility to heat stroke
 - 2022-12-01 GENES 
A Whole-Genome Sequencing Study Implicates GRAMD1B in Multiple Sclerosis Susceptibility
 - 2023-04-06 HUMAN MOLECULAR GENETICS 
Human TrkAR649W mutation impairs nociception, sweating and cognitive abilities: a mouse model of HSAN IV
 - 2020-08-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
Calsequestrin Deletion Facilitates Hippocampal Synaptic Plasticity and Spatial Learning in Post-Natal Development
 - 2021-06-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
Improper Remodeling of Organelles Deputed to Ca2+ Handling and Aerobic ATP Production Underlies Muscle Dysfunction in Ageing
 - 2021-08-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
Ageing Causes Ultrastructural Modification to Calcium Release Units and Mitochondria in Cardiomyocytes
 - 2022-04-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
Store-Operated Ca2+ Entry in Skeletal Muscle Contributes to the Increase in Body Temperature during Exertional Stress
 - 2022-05-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
High-Fat Diet Impairs Muscle Function and Increases the Risk of Environmental Heatstroke in Mice
 - 2023-03-01 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 
Searching for Mechanisms Underlying the Assembly of Calcium Entry Units: The Role of Temperature and pH
 - 2022-01-01 JOURNAL OF CELL SCIENCE 
Multiple regions within junctin drive its interaction with calsequestrin-1 and its localization to triads in skeletal muscle
 - 2024-03-04 JOURNAL OF GENERAL PHYSIOLOGY 
A novel, patient-derived RyR1 mutation impairs muscle function and calcium homeostasis in mice
 - 2021-06-01 JOURNAL OF MUSCLE RESEARCH AND CELL MOTILITY 
Calsequestrin, a key protein in striated muscle health and disease
 - 2021-06-01 JOURNAL OF MUSCLE RESEARCH AND CELL MOTILITY 
Calcium entry units (CEUs): perspectives in skeletal muscle function and disease
 - 2021-07-01 METABOLITES 
Altered Ca2+ Handling and Oxidative Stress Underlie Mitochondrial Damage and Skeletal Muscle Dysfunction in Aging and Disease
 - 2023-04-01 NEUROLOGICAL SCIENCES 
Early-onset motor polyneuropathy associated with a novel dominant NAGLU mutation