M. di Gaucher e M.di Parkinson: quale relazione Bruno Bembi Centro di Coordinamento Regionale per le Malattie Rare Ospedale Universitario di Udine 55° CONGRESSO NAZIONALE SNO Como, 22-24 aprile 2015 Gaucher disease • Most common lysosomal storage disorder • Autosomal recessive inheritance • Enzyme deficiency • Progressive, multisystemic • Different phenotypes and genotypes Gaucher Disease: Phenotypes Clinical Features Age at onset Splenomegaly Hepatomegaly Skeletal disease/ bone crises Primary CNS disease Lifespan Ethnicity/ demographic group Frequency Type 1 Type 2 Type 3 Childhood/ Adulthood Infancy Childhood + +++ + +++ - +++ ++ ++ -- + +++ + +++ ++ +++ Absent +++ 6 to 80+ years Panethnic Ashkenazi Jewish ~ 1/60,000 to 1/200,000 ~ 1/500 to 1/1,000 (AJ) ~2 years Panethnic + +++ (1st to 5th decade) 2 to 60 years Panethnic Norrbottnian 1/50,000 1/100,000 ENZYME REPLACEMENT THERAPY ERT Concepts • Replacement of the missing enzyme to correct the underlying defect – Reverses stored substrate – Prevents further substrate accumulation • Effectively treats the different compartments • Has been available since 1991 • Over 8000 children & adults safely treated world wide with ERT ERT: efficacy in Type 1 GD • Improves/normalizes laboratory parameters: Hb, PLTs, transaminases, chitotriosidase, acid phosphatase…. • Reduces tissues storage • Normalizes growth and puberal spurt • Improves/normalizes bone involvement in peadiatric and adult patients • Improves quality of life Patient Response to ERT Lateral profile of a 14-yearold girl before and 13 months after enzyme replacement therapy. Note the changes in abdominal contour and degree of lordosis and the onset of puberty during treatment. Pretreatment Post-treatment GAUCHER E PARKINSON Clinical evidence of GD1 and PD association 1. 1989: Zimran et al, case report descrive la presenza di PD in pazienti GD1 2. 1996: Neudorfer O et al,Occurrence of Parkinson's syndrome in type I Gaucher disease. QJM. Sep;89(9):691-4. 3. 2003: Bembi B et al, Gaucher's disease with Parkinson's disease: clinical and pathological aspects. Neurology. Jul 8;61(1):99-101. 4. 2010: Chérin P et al,The neurological manifestations of Gaucher disease type 1: the French Observatoire on Gaucher disease (FROG). JIMD Aug;33(4):331-8. 4/105 pazienti affetti da GD1 5. 2013: Becker JG et al. Parkinson's disease in patients and obligate carriers of Gaucher disease. Parkinsonism Relat Disord. Jan;19(1):129-31. 8/100 pazienti GD1 Ashkenazi Gaucher and Parkinson Personal casuistry: • 5 PD/91 GD1 patients (5.5%) • 3 female 2 male • average age of onset: 50.2 yrs Gaucher and Parkinson Case 1 (f: 72) Case 2 (f:75†) Case 3 (f:63) Case 4 (m 64†) Case 5 (m: 65) Age GD diagnosis 53 60 23 22 60 Age PD diagnosis 59 55 43 44 55 Genotype N370S/ N370S/ G377S/ G377S N370S/ L444P N370S/ G202R g.4426 A>G g.4426 A>G Gaucher and Parkinson Case 1 (f) Case 2 (f) normal Left limbs Clin. Sympt. resting Asymmetric onset tremor, (right) , rigidity, rigidity, bradikynesia resting tremor akynesia NMR SPECT ABR Case 3 (f) Case 4 (m) Case 5 (m) Asymmetric onset (right), rigidity, resting tremor Asymmetric onset (right) of rigidity, resting tremor akynesia nd Mild cortical atrophy Mild cortical Mild cortical atrophy athrophy nd nd Basal ganglia hypoperfusion normal nd Mild latency of I-III waves nd Encephalic trunk abnormal high tones deafness Resting tremor left hand , rigidity upper limbs, akynesia nd nd Gaucher and Parkinson Case 1 Case 2 (f) (f) EEG Case 3 (f) Case 4 (m) Case 5 (m) normal na diffuse non specific encephalic sufference slow left temporal activity na normal nd mild latency of I-III waves high tones deafness nd OMA normal na normal normal normal VEP normal na normal reduced amplitude nd 1277 na 831.6 1320 1054 ABR Ferritin* * nv: male 28-397 ng/ml; female: 6-159 ng/ml Gaucher and Parkinson Case 1 (f) Case 2 (f) Case 3 (f) Case 4 (m) Case 5 (m) L-Dopa response good good good good mild Surgery no no DBS: efficacy pallidotomy: partial efficacy No ERT dosage 60 n.d. 30-120 30-120 46-100 ERT (yrs) 12 - 15 10 5 PD response to ERT absent - absent absent absent (U/Kg/month) Gaucher and Parkinson A B C 5691 PD pts (780 Ashkenazi Jews) - 4898 controls (387 Ashkenazi Jews). Sidransky et al., NEJM, 2009 The odds ratio for any GBA mutation in PD pts versus controls was 5.43 across centers. Il gene mutato con più alta frequenza nei casi di PD sporadici è GBA!!! L’eterozigosi per mutazioni del gene GBA è il principale fattore di rischio genetico associato all’insorgenza di PD. Gaucher and Parkinson Pathogenesis of PD in GD1 • Role of ferritin : all our patients, as frequently observed in GD , showed a marked elevation in serum ferritin • The pro-oxidant activity of ferritin stored iron has been hypothesized to be involved in the damage of the dopaminergics neurons in PD (Mizuno Y et al. 1997) • Although the role of iron in PD is still debated, its storage could play a part in the pathogenesis of the disease (Kaur et al. Neuron 2003) • NEURODEGENERATION Pathogenesis of PD in GD1 NEURODEGENERAZIONE Meccanismo comune: Formazione di aggregati proteici formati da proteine con folding non corretto. Formazione di aggregati → fibre con struttura amilode = b-sheets strettamente intrecciati e impaccati Malattia di Parkinson: formazione di aggregati di synucleina (a-syn), proteina coinvolta nel traffico delle vescicole contenenti neurotrasmettitore: corpi di Lewy a-syn si accumula in modelli animali di GD e nei pazienti PD portatori di mutazioni della GBA M. Siebert et al @Brain 2014: 137;1304-132 J. H. Choi et al @Mol Gen Metab, 2011; 104 (1-2): 185-188 M. Siebert et al @Brain 2014: 137;1304-132 RINGRAZIAMENTO AOU “S.M. Misericordia” Udine Centro di Coordinamento Regionale Malattie Rare Giovanni Ciana Pediatra Andrea Dardis Biologo Responsabile Laboratorio PhD in Biologia Molecolare Stefania Zampieri Annalisa Pianta Milena Romanello Erika Malini Chimico PhD in Biochimica Biologo PhD in Scienze Biomediche e Biotecnologiche Silvia Cattarossi Irene Zanin Biologo PhD in Medicina molecolare e rigenerativa Tecnico di laboratorio Biologo Biologo PhD in in Scienze e Tecnologie Clinche Tecnico di laboratorio www.malattierare.aou.udine.it