| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Hypercholesterolaemia |  
| Hipercolesterolemia |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Hypercholesterolaemia |  
| Hipercolesterolemia |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Nutritional and Metabolic Diseases [C18] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 19.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10020603 |  
| E.1.2 | Term | Hypercholesterolaemia |  
| E.1.2 | System Organ Class | 10027433 - Metabolism and nutrition disorders |  | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| To evaluate the effect of alirocumab on low-density lipoprotein cholesterol (LDL-C) levels after 8 weeks of treatment in heterozygous familial hypercholesterolemia (heFH) patients age of 8 to 17 years, with LDL-C ≥130 mg/dL (3.37 mmol/L) on optimal stable daily dose of statin therapy +/- other lipid modifying therapies (LMTs) or a stable dose of non-statin LMTs in case of intolerance to statins for at least 4 weeks prior to the screening period. |  
| Evaluar el efecto de alirocumab administrado cada 2 semanas (C2S) o cada 4 semanas (C4S) sobre los niveles de colesterol de lipoproteínas de baja densidad (C LDL) tras 8 semanas de tratamiento en pacientes con hipercolesterolemia familiar heterocigótica (HFhe) con edades comprendidas entre 8 y 17 años, con niveles de C LDL ≥130 mg/dl (3,37 mmol/l) que estén recibiendo una dosis diaria estable óptima de tratamiento con estatinas ± otros tratamientos modificadores de lípidos (TML) o una dosis estable de TML sin estatinas en caso de intolerancia a las estatinas, durante al menos 4 semanas antes del periodo de selección. |  | 
| E.2.2 | Secondary objectives of the trial | 
| -To evaluate the safety and tolerability of alirocumab. -To evaluate the pharmacokinetics profile of alirocumab.
 -To evaluate the effects of alirocumab on other lipid parameters.
 |  
| -Evaluar la seguridad y la tolerabilidad de alirocumab. -Evaluar el perfil farmacocinético de alirocumab.
 -Evaluar los efectos de alirocumab sobre los niveles de otros parámetros lipídicos
 |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| -Children and adolescent male and female patients age of 8 to 17 years at the time of signed informed consent. For Russia only: Male and female patients aged ≥12 and ≤17 years at the time of signed informed consent. -Patients with diagnosis of heterozygous familial hypercholesterolemia (heFH) through genotyping or clinical criteria.
 -Patients treated with optimal dose of statin +/- other LMT(s) or non-statin LMT(s) if statin intolerant at stable dose for at least 4 weeks prior to screening visit (Week -2).
 -Patients with calculated LDL-C greater than or equal to 130 mg/dL (≥3.37 mmol/L) at the screening visit (Week -2).
 -Patients with body weight greater than or equal to 25kg.
 -Patients age of 8 to 9 years to be at Tanner stage 1 and patients age of 10 to 17 years to be at least at Tanner stage 2 in their development.
 -A signed informed consent indicating parental permission with or without patient assent.
 |  
| I 01.	Niños y adolescentes de ambos sexos con edades comprendidas entre 8 y 17 años en el momento de la firma del consentimiento informado. I 02.	Pacientes con un diagnóstico de hipercolesterolemia familiar heterocigótica (HFhe) por genotipado o criterios clínicos.
 I 03.	Pacientes tratados con una dosis óptima de estatinas con o sin otro(s) TML o TML sin estatinas en caso de intolerancia a las estatinas a una dosis estable durante al menos 4 semanas antes de la visita de selección (Semana -2).
 I 04.	Pacientes con C LDL calculado mayor o igual a 130 mg/dl (≥3,37 mmol/l) en la visita de selección (Semana -2).
 I 05.	Pacientes con peso corporal superior o igual a 25 kg.
 I 06.	Pacientes con edades comprendidas entre 8 y 9 años con estadio 1 de Tanner y pacientes con edades comprendidas entre 10 y 17 años al menos con estadio 2 de Tanner en su desarrollo.
 I 07.	Firma de consentimiento informado indicando el permiso paterno con o sin el asentimiento del paciente, dependiendo de la capacidad de comprensión basada en el grado de madurez.
 |  | 
| E.4 | Principal exclusion criteria | 
| -Patient with secondary hyperlipidemia. -Diagnosis of homozygous familial hypercholesterolemia.
 -Patient who has received lipid apheresis treatment within 2 months prior to the screening period, or has plans to receive it during the study.
 -Known history of type 1 or type 2 diabetes mellitus.
 -Known history of thyroid disease.
 -Known history of hypertension.
 -Fasting triglycerides >350 mg/dL (3.95 mmol/L).
 -Severe renal impairment (ie, estimated glomerular filtration rate [eGFR]  <30 mL/min/1.73 m^2.
 -Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >2 x upper limit of normal (ULN).
 -Creatinine phosphokinase (CPK) >3 x ULN.
 |  
| •	Paciente con hiperlipidemia secundaria. •	Diagnóstico de hipercolesterolemia familiar homocigótica.
 •	Paciente que ha recibido tratamiento de aféresis de lípidos en los 2 meses previos al periodo de selección, o que tiene previsto recibirlo durante el estudio.
 •	Antecedentes conocidos de diabetes mellitus tipo 1 o tipo 2.
 •	Antecedentes conocidos de enfermedad tiroidea.
 •	Antecedentes conocidos de hipertensión.
 •	Triglicéridos en ayunas >350 mg/dl (3,95 mmol/l) en la visita de selección (Semana -2).
 •	Insuficiencia renal grave (es decir, TFGe <30 ml/min/1,73 m2 en la visita de selección [Semana -2]).
 •	ALT o AST >2 x LSN (se permite 1 repetición de la analítica).
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Percent change in calculated LDL-C |  
| Cambio porcentual en el C LDL calculado |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| From baseline to Week 8 |  
| Desde el momento basal hasta la Semana 8. |  | 
| E.5.2 | Secondary end point(s) | 
| a) Absolute change in calculated LDL-C b) Percentage of participants achieving a calculated LDL-C level lower than 130 mg/dL (3.37 mmol/L)
 c) Percentage of participants achieving a calculated LDL-C level lower than 110 mg/dL (2.84 mmol/L)
 d) Percent change in Apolipoprotein B (Apo B)
 e) Percent change in non-high density lipoprotein cholesterol (non HDL-C)
 f) Percent change in Total-C
 g) Percent change in Lipoprotein (a) (Lp[a])
 h) Percent change in triglycerides (TG)
 I) Percent change in HDL-C
 l) Percent change in Apo A-1
 m) Absolute change in Apo B
 n) Absolute change in non-HDL-C
 o) Absolute change in Total-C
 p) Absolute change in Lp(a)
 q) Absolute change in TG
 r) Absolute change in HDL-C
 s) Absolute change in Apo A-1
 t) Absolute change in ratio Apo B/Apo A-1
 |  
| a) Cambio absoluto en el C-LDL calculado b) Porcentaje de participantes que alcanzaron un nivel de LDL-C por debajo de 130 mg / dl (3,37 mmol / L)
 c) Porcentaje de participantes que alcanzaron un nivel de LDL-C  inferior a 110 mg / dl (2,84 mmol / L)
 d) El porcentaje de cambio en la apolipoproteína B (Apo B)
 e) El porcentaje de cambio en las lipoproteínas de colesterol de no-alta densidad (no HDL-C)
 f) Cambio porcentual en el total-C
 g) Cambio porcentual en el lipoproteína (a) (Lp [a])
 h) El porcentaje de cambio en los triglicéridos (TG)
 I) El porcentaje de cambio en el HDL-C
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| a) From baseline to Week 8 b), c) : At week 8
 d), e), f), g) h), I), l), m), n), o), p), q), r), s), t) : From baseline to Week 8
 |  
| a) Desde el inicio hasta la semana 8 b), c): En la semana 8
 d), e), f), g), h), I), l), m), n), o), p), q), r), s), t): Desde el inicio hasta la semana 8
 |  | 
| 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 | Yes | 
| E.6.10 | Pharmacogenetic | Yes | 
| 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 | No | 
| E.8.1.1 | Randomised | No | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | No | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | Yes | 
| E.8.1.7.1 | Other trial design description |  | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 6 | 
| 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 | 11 | 
| 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 | 
| Australia |  
| Canada |  
| Israel |  
| Norway |  
| Russian Federation |  | 
| 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 | 
| LVLS |  
| Última visita del último paciente |  | 
| 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 | 6 | 
| E.8.9.1 | In the Member State concerned days |  | 
| 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 | 6 |