ClinicalTrials.gg
RecruitingNCT06597006ORION-19Updated Jul 24, 2026

Study to Evaluate Safety, Tolerability and Efficacy of Inclisiran in Children With Homozygous Familial Hypercholesterolemia

A Phase 3 interventional study of Inclisiran and Placebo in Familial Hypercholesterolemia - Homozygous, sponsored by Novartis Pharmaceuticals. Recruiting at 19 sites in 11 countries. Open to participants aged 2 Years to 11 Years. Per ClinicalTrials.gov, last updated 2026-07-24.

Sponsored by Novartis Pharmaceuticals (part of Novartis) · Phase 3, Interventional, and Treatment

From the registry’s dates

  • Started Feb 2025; still recruiting 1 year 8 months later.
Phase
Phase 3
Study type
Interventional
Enrollment
9
Allocation
Randomized
Ages
2 Years to 11 Years
Sex
All
01

Study summary

This is a pivotal phase III study designed to evaluate safety, tolerability, and efficacy of inclisiran in children (aged 2 to \<12 years) with homozygous familial hypercholesterolemia (HoFH) and elevated low density lipoprotein cholesterol (LDLC).

Read the detailed description

This is a two-part (1 year double-blind inclisiran versus placebo / 1 year open-label inclisiran) multicenter study designed to evaluate safety, tolerability, and efficacy of inclisiran in children (aged 2 to \<12 years) with homozygous familial hypercholesterolemia (HoFH) and elevated low density lipoprotein cholesterol (LDL-C) on stable standard of care background lipid-lowering therapy.

02

Conditions studied

  • Familial Hypercholesterolemia - Homozygous

Keywords

  • Homozygous familial hypercholesterolemia (HoFH),
  • LDL-cholesterol (LDL-C), children, pediatric,
  • small interfering ribonucleic acid (siRNA),
  • inclisiran,
  • Familial Hypercholesterolemia,
  • Homozygous FH,
  • Hypercholesterolemia,
  • Lipoprotein(a),
  • Hyperlipidemia,
  • Dyslipidemia,
  • Cardiovascular Diseases,
  • Heart Failure,
  • Cholesterol,
  • Aortic Stenosis
03

In context

Homozygous Familial Hypercholesterolemia

68 studies on the registry are indexed under Homozygous Familial Hypercholesterolemia; 13 are open to participants now.

This study's planned enrollment of 9 is below the median of 21 across 51 interventional studies indexed under Homozygous Familial Hypercholesterolemia.

Browse Homozygous Familial Hypercholesterolemia studies →

Lead sponsor

Novartis Pharmaceuticals is the lead sponsor of 2,718 studies on the registry; 221 are open to participants now.

Of its 585 completed or terminated interventional studies of FDA-regulated products, 438 (75%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
2 Years to 11 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female participants, 2 to \<12 years of age at screening
  • HoFH diagnosed by genetic confirmation

    - Note: Participants with known null (negative) mutations in both LDLR alleles are not eligible (see also exclusion criteria)

  • Fasting LDL-C >130 mg/dL (3.4 mmol/L) at screening
  • On an optimal dose of statin (investigator's discretion), unless statin intolerant, with or without other lipid-lowering therapy (e.g. ezetimibe)
  • Participants on lipid-lowering therapies (such as e.g. statins, ezetimibe) must be on a stable dose for ≥30 days before screening with no planned medication or dose changes during study participation
  • Participants on a documented regimen of LDL-apheresis for ≥ 3 months before screening will be allowed to continue the apheresis during the study, if needed. The apheresis schedule/settings/duration must be stable prior to screening, are not allowed to change during the double-blind period of the trial and must permit that an apheresis coincides with each study visit.

Exclusion criteria

Exclusion Criteria:

  • Documented evidence of a null (negative) mutation in both LDLR alleles
  • Previous treatment (within 90 days of screening) with monoclonal antibodies directed towards PCSK9
  • History of poor response to therapy with any monoclonal antibody directed towards PCSK9 (e.g. \<15% reduction in LDL-C)
  • Treatment with mipomersen or lomitapide (within 5 months of screening)
  • Secondary hypercholesterolemia, e.g. hypothyroidism or nephrotic syndrome
  • Heterozygous familial hypercholesterolemia (HeFH)
  • Body weight (at the screening and/or randomization (Day 1) visit) \<16 kg for participants 6 to \<12 years (at screening) or \<11 kg for participants 2 to \<6 years (at screening)
  • Active liver disease defined as any known current infectious, neoplastic, or metabolic pathology of the liver or unexplained (ALT), aspartate aminotransferase (AST) elevation >3x , or total elevation >2x ULN (except patients with Gilbert's syndrome)
  • Pregnant or nursing females
  • Recent and/or planned use of other medicinal products or devices
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
9 participants (estimated)

Study arms

  • Experimental
    Inclisiran

    Year 1 - inclisiran sodium subcutaneous injection (given at Days 1, 90, and 270) Day 360 only - placebo subcutaneous injection Year 2 - inclisiran sodium subcutaneous injection (given at Days 450 and 630)

    Drug: Inclisiran

  • Placebo comparator
    Placebo

    Year 1 - placebo subcutaneous injection (given at Days 1, 90 and 270) Year 2 - inclisiran sodium subcutaneous injection (given at Days 360, 450, and 630)

    Drug: Placebo

Interventions

  • Inclisiran (inclisiran sodium 300 mg subcutaneous (s.c.) for participants with body weight ≥23 kg, inclisiran sodium 180 mg s.c. for participants with body weight \<23 kg to ≥16 kg, or inclisiran sodium 100 mg s.c. for participants with body weight \<16 kg. The dose level is based on the participant's body weight on Day 1 (for Part 1) and Day 360 (for Part 2), respectively.

    Also known as: KJX839

  • DrugPlacebo

    Sterile normal saline (0.9% sodium chloride in water for subcutaneous injection)

    Also known as: saline solution

06

What researchers measure

Primary outcomes

  1. Percentage change in LDL-C from baseline to Day 330 (Year 1)

    Evaluate the effect of inclisiran compared to placebo on reducing LDL-C \[percent change\] at Day 330

    Time frame: Baseline and Day 330

Secondary outcomes

  1. Time-adjusted percent change in LDL-C from baseline after Day 90 and up to Day 330 (Year 1)

    Evaluate the effect of inclisiran compared to placebo on reducing LDL-C \[time-adjusted percent change\] over Year 1

    Time frame: Baseline, after Day 90 up to Day 330

  2. Percent change in LDL-C, total cholesterol, non-HDL-C, triglycerides, HDL-C, VLDL-C from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  3. Percent change in PCSK9 from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  4. Percent change in Apo B, Apo A1 from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  5. Absolute change in LDL-C, total cholesterol, non-HDL-C, triglycerides, HDL-C, VLDL-C from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  6. Absolute change in PCSK9 from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  7. Absolute change in Apo B, Apo A1 from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  8. Percent change in Lp(a) from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

  9. Absolute change in Lp(a) from baseline to each assessment time up to Day 720 (Year 2)

    Evaluate the effect of inclisiran, compared to placebo (for Year 1) and long-term (up to Day 720), on lowering LDL-C, other lipoprotein and lipid parameters, and PCSK9 over time

    Time frame: Baseline, up to Day 720

07

Study locations

19 of 19 sites recruiting
  • UC San Francisco Medical Center
    San Francisco, California 94143-0348, United States
    Recruiting
    • Luis Gay · Contactluis.gay@ucsf.edu · +1 415 476 8338
    • Martin Thelin · Principal investigator
  • Childrens National Hospital
    Washington D.C., District of Columbia 20010, United States
    Recruiting
  • Washington Univ School Of Medicine
    St Louis, Missouri 63110, United States
    Recruiting
  • Primary Childrens Medical Center
    Salt Lake City, Utah 84113, United States
    Recruiting
  • Novartis Investigative Site
    Vienna, 1090, Austria
    Recruiting
  • Novartis Investigative Site
    Beijing, Beijing Municipality 100013, China
    Recruiting
  • Novartis Investigative Site
    Frankfurt am Main, Hesse 60590, Germany
    Recruiting
  • Novartis Investigative Site
    Ioannina, 455 00, Greece
    Recruiting
  • Novartis Investigative Site
    Thessaloniki, 546 42, Greece
    Recruiting
  • Novartis Investigative Site
    Kota Bharu, Kelantan 16150, Malaysia
    Recruiting
  • Novartis Investigative Site
    Amsterdam, North Holland 1105 AZ, Netherlands
    Recruiting
  • Novartis Investigative Site
    Bloemfontein, Free State 9301, South Africa
    Recruiting
  • Novartis Investigative Site
    Johannesburg, Gauteng 2193, South Africa
    Recruiting
  • Novartis Investigative Site
    Taichung, 407219, Taiwan
    Recruiting
  • Novartis Investigative Site
    Taipei, 111045, Taiwan
    Recruiting
  • Novartis Investigative Site
    Adana, Saricam 01330, Turkey (Türkiye)
    Recruiting
  • Novartis Investigative Site
    Ankara, Yenimahalle 06500, Turkey (Türkiye)
    Recruiting
  • Novartis Investigative Site
    Izmir, 35100, Turkey (Türkiye)
    Recruiting
  • Novartis Investigative Site
    Southampton, SO16 6YD, United Kingdom
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes — Novartis is committed to sharing with qualified external researchers, access to patient-level data and supporting clinical documents from eligible studies. These requests are reviewed and approved by an independent review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. This trial data availability is according to the criteria and process described on www.clinicalstudydatarequest.com.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 24, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06597006
Responsible party
Sponsor
First posted
Sep 19, 2024
Start date
Feb 28, 2025
Primary completion
Mar 21, 2028 (estimated)
Completion
Apr 15, 2029 (estimated)
Last update
Jul 24, 2026

Study contacts

Novartis Pharmaceuticals
Contact
novartis.email@novartis.com
1-888-669-6682
Novartis Pharmaceuticals
Contact
+41613241111
Novartis Pharmaceuticals
study director · Novartis Pharmaceuticals

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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