La Clinica e la terapia della SM

Presentazione sul tema: "La Clinica e la terapia della SM"— Transcript della presentazione:

1 La Clinica e la terapia della SM
G.L Mancardi Clinica Neurologica II, Università di Genova e Centro di Eccellenza per la Ricerca Biomedica

2 La Sclerosi multipla La SM e’ una malattia infiammatoria cronica del SNC, caratterizzata da distruzione mielinica focale, lesione e perdita assonale di vario grado e progressiva disfunzione neurologica. La malattia e’ verosimilmente dovuta a una risposta immunomediata linfocitaria T e anticorpale diretta contro antigeni del SNC. Non sono ancora completamente chiari gli eventi che scatenano tale risposta autoimmune e i meccanismi di cronicizzazione della risposta entro il SNC

3 MS case. : Woelke-Heidenhain stain

4 MS. Perivascular cuff of CD4 positive T cells

5 MS. Inflammatory infiltrate of CD8+ T cells

6 MS case. : Woelke-Heidenhain stain

7 MS case: Oil Red O stain

8 Il danno assonale L’assone puo’ essere danneggiato nella fase acuta infiammatoria L’assone puo’ degenerare in seguito, perche’ privo di mielina, per fenomeni non legati alla infiammazione

9 APP positive axons in an early active MS lesion

10 Organotypic DRG cultures
Three months old Transgenic cultures Normal control

11 Sclerosi multipla La sostanza bianca apparentemente normale

12 MS. Fibrillary gliosis of NAWM
From Prineas and McDonald, 1997

13 Interpretazione dei patterns di IgG
Bande oligoclonali presenti solo nel CSF Singola banda nel CSF Mirror pattern Bande addizionali presenti nel CSF Normale Pattern Monoclonale IgG nel CSF e nel siero

14 Decorso della sclerosi multipla
Compston and Coles, Lancet 2002

15 I sintomi della Sclerosi Multipla
Nell’80% circa dei casi il decorso e’ inizialmente a ricadute e remissioni. La frequenza di ricadute e’ di circa 1.5 all’anno, e tendono a diminuire col passare del tempo. L’esordio e’ intorno ai anni e verso i anni la malattia diventa progressiva.

16 I sintomi della Sclerosi Multipla
Sintomi di esordio Ipostenia in uno o più arti 40% Neurite ottica 22% Parestesie 21% Diplopia 12% Vertigine 5% Turbe urinarie 5% Altre < 5%

17 I sintomi della Sclerosi Multipla
Sintomi motori Ipostenia Spasticità Fatica Sintomi cerebellari Disturbi della motilità oculare Paralisi internucleare Nistagmo

18 I sintomi della Sclerosi Multipla
Disturbi sensitivi Dolore Segno di Lhermitte Disturbi parossistici Neurite ottica Altri nervi cranici

19 I sintomi della Sclerosi Multipla
Disturbi sfinterici Disturbi cognitivi

20 Terapia della sclerosi multipla
Terapia di prima linea Interferon beta 1a 1b Copolimero 1 Azatioprina* Terapia di seconda linea Mitoxantrone Ciclofosfamide* Natalizumab *Non approvate per la terapia della SM

21 Frequenza di ricadute 68% Riduzione vs. placebo
Placebo n=315 TYSABRI n=627 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Annualized Relapse Rate (95% CI) P<0.0001 0.73 0.23 Anni 0-2 68% 70% 0.78 0.67 0.27 0.20 Anno 0-1 Anno 1-2 66% The pre-specified primary endpoint at 1 year was the rate of clinical relapses. Annualized relapse rate for the TYSABRI and placebo groups over the 2-year study period and over the first and second years of the AFFIRM trial are shown in this slide. Over the 2-year study, TYSABRI reduced annualized relapse rate by 68% compared with placebo (P<0.0001). During this 2-year period, the annualized relapse rate was 0.23 in the TYSABRI group and 0.73 in the placebo group. From baseline to Year 1, the annualized relapse rate was 0.27 in the TYSABRI group and 0.78 in the placebo group (P<0.0001), representing a reduction of 66%. From Year 1 to Year 2, TYSABRI reduced the annualized relapse rate by 70% compared with placebo (0.20 in the TYSABRI group and 0.67 in the placebo group; P<0.0001). When annualized relapse rate was calculated using the same methods used by the FDA for the 1-year AFFIRM data (the per-subject mean), the relapse rate at 2 years was 0.22 in the TYSABRI group and 0.67 in the placebo group (67% reduction). Polman C, et al. Presented at the 57th Annual Meeting of the American Academy of Neurology, April 12, 2005. AFFIRM Study

22 Proportion With Sustained Progression
Progressione della disabilità 42% Riduzione della disabilità verso placebo Number of Patients at Risk Placebo TYSABRI 315 296 283 264 248 240 229 216 208 200 627 601 582 567 546 525 517 503 490 478 Placebo 29% TYSABRI 17% 0.0 0.1 0.2 0.3 0.4 Weeks 12 24 36 48 60 72 84 96 108 120 199 473 P=0.0002 Hazard ratio (HR)=0.58 Proportion With Sustained Progression The effect of TYSABRI on disability was assessed using multiple measures. The pre-specified primary endpoint at 2 years was the time to onset of sustained disability progression as measured by the EDSS. Sustained disability progression was defined as either a 1.0-point increase in EDSS score from baseline EDSS score of 1.0 sustained for 12 weeks, or a 1.5-point increase in EDSS score from baseline EDSS score of 0.0 sustained for 12 weeks; progression could not be confirmed during a relapse. Time to sustained disability progression was analyzed using a Cox proportional hazards model. The predefined statistical model included baseline EDSS score, and additional baseline factors were tested for inclusion in the model: EDSS score (3.5 or >3.5), Gd+ lesions (present or absent), number of T2-hyperintense lesions (<9 or 9), and age (<40 or 40 years). Each covariate was tested in the model for statistical significance using a backward selection procedure, and only statistically significant covariates were included. Only age was included in the final model for disability progression. This slide shows Kaplan-Meier plots of time to sustained disability progression in the TYSABRI and placebo groups over 2 years in the AFFIRM trial. TYSABRI reduced the risk of sustained disability progression over 2 years by 42% compared with placebo (Hazard ratio = 0.58; 95% confidence interval [CI]: 0.43, 0.77; P=0.0002). Kaplan-Meier estimates of the cumulative probability of progression over 2 years were 17% in the TYSABRI group and 29% in the placebo group. Polman C, et al. Presented at the 57th Annual Meeting of the American Academy of Neurology, April 12, 2005. AFFIRM Study

23 Lesioni Gd+ 92% Riduzione vs. Placebo
92% reduction P<0.0001 Mean Number of Gd+ Lesions 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 At Year 2 0.1 Placebo n=315 TYSABRI n=627 Gd+ lesions are a marker of BBB breakdown and acute inflammation. This MRI outcome was selected to evaluate the potential of TYSABRI to reduce the formation of the acute areas of demyelination, which often correlate with acute clinical attacks. This slide shows the mean number of Gd+ lesions at 2 years in the AFFIRM trial. TYSABRI significantly reduced the mean number of Gd+ lesions by 92% compared with placebo (P<0.0001). The robust effect of TYSABRI on the number of Gd+ lesions in AFFIRM indicates that TYSABRI reduces the formation of acute areas of demyelination, which have been shown to correlate with acute clinical relapses.1-3 The effect of TYSABRI on Gd+ lesions is important because of the established association between Gd+ lesions and the evolution of more chronic pathology as measured by T1-hypointense lesions, which reflect permanent demyelination and axonal damage.4 Given the mechanism of action of TYSABRI (inhibition of leukocyte migration across the BBB), the current results validate the importance of interfering with this component of the disease process in reducing inflammation and subsequent neuropathology. 1Kappos L, et al. Lancet. 1999;353: ; 2Koudriavtseva T, et al. J Neurol Neurosurg Psychiatry. 1997;62: ; 3Miller DH, et al. Ann Neurol. 1996;39:6-16; 4Simon JH, et al. Neurology. 2000;55: Miller DH, et al. Presented at the 57th Annual Meeting of the American Academy of Neurology, April 12, 2005. AFFIRM Study

24 IMMUNOSOPPRESSION IN MULTIPLE SCLEROSIS
Azathioprine Cyclophosphamide Methotrexate Mitoxantrone* Cyclosporine Cladribine CAMPATH-1H TBI/TLI ASCT *The only immunosuppressive therapy approved for SPMS, PRMS and RRMS.

25 La terapia della SM Non solo terapia etiopatogenetica
Terapia sintomatica Accettazione della disabilità Conservazione del ruolo lavorativo, sociale, familiare.