E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
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E.1.1.2 | Therapeutic area | Diseases [C] - Nervous System Diseases [C10] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10028245 |
E.1.2 | Term | Multiple sclerosis |
E.1.2 | System Organ Class | 10029205 - Nervous system disorders |
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E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
- Part A: To assess the effect of SAR443820 compared to placebo on serum neurofilament (sNfL) - Part B: To assess long-term trends in durability of sNfL |
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E.2.2 | Secondary objectives of the trial |
- Part A: To evaluate efficacy of SAR443820 compared to placebo on imaging and clinical endpoints - Part A: To explore effect of SAR443820 compared to placebo on brain volume and chronic lesions - Part A: To assess the safety and tolerability of SAR443820 - Part A: To assess pharmacokinetic (PK) of SAR443820 - Part B: To explore the effect of SAR443820 on brain volume and chronic lesions - Part B: To assess the long-term safety and tolerability of SAR443820 - Part B: To evaluate long-term effect of SAR443820 on disease progression and activity assessed by other clinical and imaging measures on physical function and patient reported outcomes (PROs) |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
- Male or female, 18 to 60 years (inclusive) of age, at the time of signing the informed consent. - Participants with diagnosis of RRMS, SPMS (relapsing or non-relapsing) or primary progressive subtype according to the 2017 revision of the McDonald diagnostic criteria (SPMS diagnostic criteria according to initial relapsing remitting disease course followed by progression with or without occasional relapses, minor remissions, and plateaus; progression denotes the continuous worsening of neurological impairment over at least 6 months). - Participants with Expanded Disability Status Scale (EDSS) score of 2-6 inclusive at screening. - Participants who in the opinion of the Investigator are stable on their disease-modifying therapy (DMT) (past 3 months), and do not require a change in multiple sclerosis (MS) treatment for the duration of Part A (through Week 48). - Participants with body weight at least 45 kg and body mass index (BMI) at least 18.0 kg/m^2. - Contraceptive use by men and women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies. |
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E.4 | Principal exclusion criteria |
Participants are excluded from the study if any of the following criteria apply:
Medical conditions - Participants with a history of seizures or epilepsy (history of febrile seizure during childhood is allowed). - Participants with known clinical relapse (acute or subacute episodes of new or increasing neurological dysfunction followed by full or partial recovery, in absence of fever or infection) within 8 weeks of study enrollment. - Participants with neurological disease history other than MS, eg, head trauma within 3 months, cerebrovascular disease, and vascular dementia. - Participants with a history of recent serious infection (eg, pneumonia,septicemia) within 4 weeks of screening; an infection requiring hospitalization or intravenous antibiotics, antivirals, or antifungals within 4 weeks of screening; or chronic bacterial infections (such as tuberculosis) deemed unacceptable, as per Investigator’s judgment. - Participants who have significant cognitive impairment, psychiatric disease, other neurodegenerative disorders (eg, Parkinson disease or Alzheimer disease), substance abuse, or any other conditions that would make the participants unsuitable for participating in the study or could interfere with assessment or completing the study in the opinion of the Investigator. - Participants with a documented history of attempted suicide over the 24 weeks prior to the Screening Visit, presents with suicidal ideation of category 4 or 5 on the Columbia Suicide Severity Rating Scale (C-SSRS),or if in the Investigator's judgment, the participant is at risk for a suicide attempt. - Participants with a history of unstable or severe cardiac, pulmonary, oncological, hepatic, or renal disease or another medically significant illness other than MS precluding their safe participation in this study. - Participants who received a live vaccine within 14 days before the Screening Visit. - Participants with a known history of allergy to any ingredients of SAR443820 (mannitol, lactose monohydrate, sodium starch glycolate, colloidal silicon dioxide, magnesium stearate, hypromellose, titanium dioxide, polyethylene glycol, and microcrystalline cellulose).
Prior/concomitant therapy - Participants with a current use of any medications that are moderate or strong inhibitors or strong inducers of cytochrome P450 3A4 (CYP3A4). - Participants with a current use of any of the following medications/treatments: fampridine/dalfampridine, ofatumumab, fingolimod, cladribine, siponimod, ponesimod, ozanimod, alemtuzumab, mitoxantrone, ocrelizumab, natalizumab, or similar approved compounds but with different trade names and any unapproved treatments or therapies for MS. Any DMTs newly approved after July 2022 that are marketed at any time during the course of the double-blind study period. These medications are not allowed within 5 half-lives before the Screening Visit and for the duration of Part A.
Prior/concurrent clinical study experience - Participants who have prior/concurrent clinical study enrollment, ie, the participant has taken other investigational drugs within 4 weeks or 5 halflives, whichever is longer, before the first Screening Visit; concurrent or recent participation in non-interventional studies may be permitted.
Diagnostic assessments Participants with abnormal laboratory test(s) at the Screening Visit: - Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) more than 3.0 x upper limit of normal (ULN) - Bilirubin more than 1.5 x ULN; unless the participant has documented Gilbert syndrome (isolated bilirubin more than 1.5 x ULN is acceptable if bilirubin is fractionated and direct bilirubin less than 35%) - Serum albumin less than 3.5 g/dL - Estimated Glomerular filtration rate less than 60 mL/min/1.73 m^2 (Modification of Diet in Renal Disease [MDRD]) - Other abnormal laboratory values or electrocardiogram (ECG) changes that are deemed clinically significant as per Investigator’s judgment |
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E.5 End points |
E.5.1 | Primary end point(s) |
1)Part A: Week 48 sNfL levels relative to baseline 2)Part B: Week 96 sNfL levels relative to baseline |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
1)2)From baseline (Week 0) to Week 48
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E.5.2 | Secondary end point(s) |
1)Part A: Cumulative number of new gadolinium (Gd)-enhancing T1 hyperintense lesions as detected by magnetic resonance imaging (MRI) 2)Part A: Cumulative number of new and/or enlarging T2 hyperintense lesions as detected by MRI 3)Part A: Time to onset of 12 weeks confirmed disability progression (CDP) from baseline as assessed by the Expanded Disability Status Scale (EDSS) score 4)Part A: Time to onset of sustained 20% increase in 9-Hole Peg Test (9-HPT) confirmed over at least 12 weeks 5)Part A: Time to onset of sustained 20% increase in timed 25-foot walk test (T25-FW) confirmed over at least 12 weeks 6)Part A: Change from baseline in EDSS Plus 7)Part A: Annualized relapse rate (ARR) of RMS population (relapsing SPMS and RRMS) 8)Part A: Percent change from baseline in brain volume loss (BVL) as detected by brain MRI 9)Part A: Change from baseline in the volume, number, and intensity (T1) of slowly expanding lesions (SELs), and normalized T1 intensity in lesions 10)Part A: Change from baseline in the total number and volume of non-enhancing lesions 11)Part A: Change from baseline in the number of phase rim lesions (PRL) (subset of centers with 3T capacity, 25% of participants) 12)Part A and Part B: Incidence of adverse event(AE), serious adverse event (SAE), treatment emergent adverse event (TEAE), potentially clinically significant abnormality (PCSA) in laboratory tests, electrocardiogram (ECG) and vital signs 13)Part A: Plasma concentration of SAR443820 14)Part B: Percent change from baseline in BVL as detected by brain MRI 15)Part B: Change from baseline in volume, number and intensity (T1) in SEL and normalized T1 intensity in lesions 16)Part B: Change from baseline in the total number and volume of non-enhancing lesions 17)Part B: Change from baseline in the number of PRLs (same participants/centers from Part A with 3T capacity, 25% of participants) 18)Part B: Cumulative number of new Gd enhancing lesions as detected by T1-weighted MRI 19)Part B: number of new or enlarging T2- hyperintense lesions on MRI 20)Part B: ARR of RMS population (relapsing SPMS and RRMS) 21)Part B: Time to onset of composite CDP (CCDP), confirmed over at least 12 weeks (3-month CCDP), by the EDSS Plus composite(EDSS score increase, OR 20% increase in the T25-FW test, OR 20% increase in the 9-HPT) 22)Part B: Time to onset of 12 weeks CDP as assessed by the EDSS score 23)Part B: Time to onset of sustained 20% increase in 9-HPT confirmed over at least 12 weeks 24)Part B: Time to onset of sustained 20% increase T25-FW test confirmed over at least 12 weeks 25)Part B: Change from baseline in EDSS Plus 26)Part B: Change in Multiple Sclerosis Impact Scale -29 version 2 (MSIS-29v2m) physical and psychological domains scoring 27)Part B: Change in Multiple Sclerosis Walking Scale 12 items (MSWS-12m) |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
1)Baseline (Week 0) to Week 48 2)Baseline (Week 0) to Week 48 3)Up to Week 48 4)Up to Week 48 5)Up to Week 48 6)From baseline (Week 0) to Week 48 7)Up to Week 48 8)From baseline (Week 0) to Weeks 48 9)From baseline (Week 0) to Weeks 12, 24, 36 and 48 10)From baseline (Week 0) to Weeks 12, 24, 36 and 48 11)From baseline (Week 0) to Weeks 12, 24, 36 and 48 12)Up to Week 96 13)Up to Week 36 14)From baseline (Week 0) to Week 96 15)From baseline (Week 0) to Weeks 96 16)From baseline (Week 0) to Weeks 96 17)From baseline (Week 0) to Weeks 96 18)Week 48 to Week 96 19)Week 48 to Week 96 20)Up to Week 96 21)Up to Week 96 22)Up to Week 96 23)Up to Week 96 24)Up to Week 96 25)From baseline (Week 0) to Week 96 26)From baseline (Week 0) to Week 96 27)From baseline (Week 0) to Week 96 |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | Yes |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.4.1 | Number of sites anticipated in Member State concerned | 4 |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 39 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | Yes |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned |
Canada |
China |
United States |
France |
Poland |
Spain |
Czechia |
Germany |
Italy |
Belgium |
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E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 11 |
E.8.9.1 | In the Member State concerned days | 9 |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 11 |
E.8.9.2 | In all countries concerned by the trial days | 9 |