A Trial of Etelcalcetide in Pediatric Participants With Secondary Hyperparathyroidism and Chronic Kidney Disease on Hemodialysis

Phase 3, Randomized, Open-label, Controlled, Multiple Dose, Efficacy, Safety, Pharmacokinetic, and Pharmacodynamic Study of Etelcalcetide in Pediatric Subjects 28 Days to < 18 Years of Age With Secondary Hyperparathyroidism and Chronic Kidney Disease Receiving Maintenance Hemodialysis

This is a phase 3 trial of etelcalcetide in pediatric participants with secondary hyperparathyroidism (SHPT) and chronic kidney disease (CKD) on hemodialysis.

Study Overview

• Status: Recruiting
• Conditions: Chronic Kidney Disease; Secondary Hyperparathyroidism
• Intervention / Treatment: Drug: Etelcalcetide; Other: Standard of Care

Detailed Description

SHPT is a common and serious co-morbidity that develops relatively early in the course of CKD, worsens with declining kidney function, and is associated with serious complications in children on dialysis. Children on dialysis experience a wide spectrum of bone abnormalities and growth retardation, in addition to increased risk for cardiovascular morbidity and mortality that manifests early in their adulthood. Traditional therapies for SHPT (eg, vitamin D sterols) are widely used in the pediatric dialysis population, and have the potential to aggravate complications of the disease by increasing serum calcium (Ca), serum phosphorus, and serum Ca times serum phosphorus product.

Etelcalcetide has been shown to be safe and efficacious in treating adult CKD patients with SHPT by simultaneously controlling intact parathyroid hormone (iPTH), Ca, and phosphorus, and has recently been approved for use in adult patients with SHPT treated with hemodialysis in both the United States and Europe. Although no previous trials have been conducted in pediatric patients with etelcalcetide (one single dose pharmacokinetic [PK] trial is currently ongoing), Amgen anticipates minimal to moderate risk with a possibility of direct benefit to the pediatric participants (age 28 days to 18 years) in this trial. The burden of complications of SHPT in the pediatric dialysis population and the limitations of current standard therapy, underscore the need for trials of etelcalcetide in these patients to address this unmet medical need and inform the pediatric nephrology community of the potential use of etelcalcetide in children on hemodialysis with critical safety and efficacy data.

• Study Type: Interventional
• Enrollment (Estimated): 56
• Phase: Phase 3

Contacts and Locations

• Study Contact: Name: Amgen Call Center; Phone Number: 866-572-6436; Email: medinfo@amgen.com

Study Locations

• Argentina
  • Buenos Aires
    • Belén de Escobar, Buenos Aires, Argentina, B1625DUG
      • Terminated
      • Fresenius Escobar
    • Cuidad Autonoma de Buenos Aires, Buenos Aires, Argentina, C1199ABB
      • Recruiting
      • Hospital Italiano
  • Tucumán Province
    • San Miguel de Tucumán, Tucumán Province, Argentina, 4000
      • Recruiting
      • Centro Infantil Del Rinon
• India
  • Karnataka
    • Bangalore, Karnataka, India, 560 017
      • Active, not recruiting
      • Manipal Hospital
    • Belagavi, Karnataka, India, 590010
      • Active, not recruiting
      • KLES Dr Prabhakar Kore Hospital and Medical Research Centre
  • National Capital Territory of Delhi
    • New Delhi, National Capital Territory of Delhi, India, 110 070
      • Active, not recruiting
      • Fortis Flt Lt Rajan Dhall Hospital
    • New Delhi, National Capital Territory of Delhi, India, 110029
      • Active, not recruiting
      • All India Institute of Medical Sciences
    • New Delhi, National Capital Territory of Delhi, India, 110060
      • Active, not recruiting
      • Sir Ganga Ram Hospital
  • West Bengal
    • Kolkata, West Bengal, India, 700014
      • Active, not recruiting
      • NRS Medical College and Hospital
• Malaysia
  • Kelantan
    • Kota Bharu, Kelantan, Malaysia, 15586
      • Terminated
      • Hospital Raja Perempuan Zainab II
  • Kuala Lumpur
    • Kuala Lumpur, Kuala Lumpur, Malaysia, 50300
      • Terminated
      • Hospital Wanita Dan Kanak-Kanak Kuala Lumpur
  • Negeri Sembilan
    • Seremban, Negeri Sembilan, Malaysia, 70300
      • Terminated
      • Hospital Tuanku Jaafar
• Russia
  • Moscow, Russia, 107014
    • Terminated
    • SBHI Pediatrics city clinical hospital of Saint Vladimir
  • Saint Petersburg, Russia, 198205
    • Completed
    • SBHI Children's City Multidisciplinary Clinical Specialized Center of High Medical Technologies
  • Samara, Russia, 443095
    • Terminated
    • State Budgetary Healthcare Institution Samara Regional Clinical Hospital na V D Seredavin
• Singapore
  • Singapore, Singapore, 119074
    • Recruiting
    • National University Hospital
• South Korea
  • Seoul, South Korea, 05505
    • Terminated
    • Asan Medical Center
  • Seoul, South Korea, 110-744
    • Terminated
    • Seoul National University Hospital
  • Yangsan-si, Gyeongsangnam-do, South Korea, 50612
    • Terminated
    • Pusan National University Yangsan Hospital
• Taiwan
  • Kaohsiung City, Taiwan, 81362
    • Terminated
    • Kaohsiung Veterans General Hospital
  • Tainan, Taiwan, 70403
    • Terminated
    • National Cheng Kung University Hospital
  • Taipei, Taiwan, 10041
    • Recruiting
    • National Taiwan University Hospital
  • Taoyuan District, Taiwan, 33305
    • Recruiting
    • Linkou Chang Gung Memorial Hospital
• Turkey (Türkiye)
  • Ankara, Turkey (Türkiye), 06800
    • Recruiting
    • Ankara Bilkent Sehir Hastanesi
  • Ankara, Turkey (Türkiye), 06230
    • Recruiting
    • Hacettepe Universitesi Tip Fakultesi Hastanesi
  • Ankara, Turkey (Türkiye), 06500
    • Recruiting
    • Gazi Universitesi Saglik Arastirma ve Uygulama Merkezi Gazi Hastanesi
  • Ankara, Turkey (Türkiye), 06490
    • Recruiting
    • Baskent Universitesi Ankara Hastanesi
  • Elâzığ, Turkey (Türkiye), 23200
    • Recruiting
    • Firat Universitesi Tip Fakultesi Hastanesi
  • Istanbul, Turkey (Türkiye), 34890
    • Recruiting
    • Marmara Universitesi Tip Fakultesi Hastanesi
  • Istanbul, Turkey (Türkiye), 34098
    • Recruiting
    • Istanbul Universitesi Cerrahpasa Tip Fakultesi
  • Izmir, Turkey (Türkiye), 35040
    • Recruiting
    • Ege Universitesi Tip Fakultesi Hastanesi
  • Kayseri, Turkey (Türkiye), 38039
    • Recruiting
    • Erciyes Universitesi Tip Fakultesi Hastanesi
• Ukraine
  • Kyiv, Ukraine, 01135
    • Terminated
    • National Childrens Specializated Hospital Okhmadit
• United States
  • California
    • Los Angeles, California, United States, 90027
      • Recruiting
      • Childrens Hospital of Los Angeles
  • Colorado
    • Aurora, Colorado, United States, 80045
      • Terminated
      • Childrens Hospital Colorado
  • Missouri
    • Kansas City, Missouri, United States, 64108
      • Recruiting
      • Childrens Mercy Hospital
  • New York
    • New York, New York, United States, 10029
      • Completed
      • Mount Sinai Kidney Center - B1 Renal Treatment
  • Ohio
    • Cincinnati, Ohio, United States, 45229
      • Completed
      • Cincinnati Childrens Hospital Medical Center
    • Cleveland, Ohio, United States, 44195
      • Recruiting
      • Cleveland Clinic Foundation
  • Oklahoma
    • Oklahoma City, Oklahoma, United States, 73104
      • Completed
      • The Childrens Hospital at Oklahoma University Medical Center
  • Pennsylvania
    • Philadelphia, Pennsylvania, United States, 19104
      • Recruiting
      • Childrens Hospital of Philadelphia
  • Texas
    • Dallas, Texas, United States, 75390
      • Terminated
      • Childrens Medical Center Dallas
  • Utah
    • Salt Lake City, Utah, United States, 84113
      • Recruiting
      • Primary Childrens Hospital Outpatient Services

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 second to 18 years (Child, Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion criteria

• Age of 28 days < 18 years.
• Dry weight ≥ 7 kg during screening.
• Diagnosed with CKD and SHPT undergoing hemodialysis at the time of screening.
• Diagnosis of SHPT with the mean of the 2 consecutive central laboratory iPTH values ≥ 300 pg/mL (32 pmol/L) during screening, on separate days and within 2 weeks of enrolment.
• Serum corrected calcium (cCa) value ≥ 9.0 mg/dL (2.25 mmol/L) for participants ≥ 2 years of age and older and serum cCa value ≥ 9.6 mg/dL (2.4 mmol/L) for participants 28 days to < 2 years of age obtained from the central laboratory during screening.
• Dialysate Ca level ≥ 2.5 mEq/L during screening for at least 4 weeks prior to screening and throughout the duration of the trial.
• No more than a maximum prescribed dose change of 50% for active vitamin D sterols/phosphate binders/Ca supplements within the 2 weeks prior to screening assessments and remain stable.
• SHPT not due to vitamin D deficiency, per investigator assessment.

Exclusion Criteria Disease Related

• History of congenital long QT syndrome, second or third degree heart block, ventricular tachyarrhythmia's or other conditions associated with prolonged QT interval.
• Anticipated or scheduled parathyroidectomy during the trial period.
• Anticipated or scheduled kidney transplant during the trial period.
• Participant has received a parathyroidectomy within 6 months prior to randomization.

Other Medical Conditions

• History of other malignancy, except non-melanoma skin cancers, cervical or breast ductal carcinoma in situ within the last 5 years.

Prior/Concomitant Therapy

• Use of concomitant medications that may prolong the corrected QT interval (eg, ondansetron, albuterol, sotalol, amiodarone, erythromycin, or clarithromycin). Refer to CredibleMeds.org for guidance. Certain medications may be allowed based on review by the medical monitor and require additional electrocardiogram (ECG) monitoring and potential electrolyte monitoring.
• Receipt of cinacalcet therapy within 30 days prior to screening assessments and through randomization.
• Receipt of etelcalcetide within 6 months prior to screening assessments and through randomization.
• All herbal medicines (eg, St. John's wort), vitamins, and supplements consumed by the participant within the 30 days prior to randomization, and continuing use if applicable, will be reviewed by the Principal Investigator and the Amgen Medical Monitor. Written documentation of the review and Amgen acknowledgment is required for participant participation.
• Use of any over-the-counter or prescription medications within the 14 days or 5 half-lives (whichever is longer) prior to randomization that are not established therapies for participants with renal disease or other conditions secondary to renal disease will be reviewed by the Principal Investigator and the Amgen Medical Monitor. Written documentation of the review and Amgen acknowledgment is required for participant participation. Paracetamol for analgesia will be allowed.

Prior/Concurrent Clinical Trial Experience • Currently receiving treatment in another investigational device or drug trial, or less than 30 days or 5 half-lives (whichever is longer) since ending treatment on another investigational device or drug trial(s). Other investigational procedures while participating in this trial are excluded.

Diagnostic Assessments During Screening

• Participant has significant abnormalities on the most recent central laboratory test during the screening period prior to enrollment per the Investigator including but not limited to the following: a. Serum transaminase (alanine aminotransferase [ALT] or serum glutamic pyruvic transaminase [SGPT], aspartate aminotransferase [AST] or serum glutamic oxaloacetic transaminase [SGOT]) > 2.0 times the upper limit of normal (ULN).
• Corrected QT interval (QTc) > 500 ms, using Bazett's formula.
• QTc ≥ 450 to ≤ 500 ms, using Bazett's formula, unless written permission to enroll is provided by the investigator after consultation with a pediatric cardiologist.
• Participant has a clinically significant ECG abnormality during screening that, in the opinion of the investigator, could pose a risk to participant safety or interfere with the trial evaluation.

Within the 60 days prior to enrollment

• New onset or worsening of a pre-existing seizure disorder.

Other Exclusions

• Participants aged 28 days to 6 months of age who were born prematurely at < 36 weeks gestational age.
• Female participant is pregnant or breastfeeding or planning to become pregnant or breastfeed during treatment and for an additional 3 months after the last dose of etelcalcetide. (Females of childbearing potential should only be included in the trial after a confirmed menstrual period and a negative highly sensitive serum pregnancy test within 7 days prior to the first dose of investigational product).
• Female participants of childbearing potential unwilling to use 1 highly-effective or acceptable method of contraception during treatment and for an additional 3 months after the last dose of investigational product.
• Participant has known sensitivity to etelcalcetide or excipients to be administered during dosing.
• Participant likely to not be available to complete all protocol-required trial visits or procedures, and/or to comply with all required trial procedures (eg, to the best of the participant and investigator's knowledge).
• History or evidence of any other clinically significant disorder, condition, or disease (with the exception of those outlined above) that, in the opinion of the investigator or Amgen physician, if consulted, would pose a risk to participant safety or interfere with the trial evaluation, procedures, or completion.
• Participant has previously entered this trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Etelcalcetide; Participants are randomized in a 5:1 ratio to receive etelcalcetide in addition to standard of care versus standard of care alone.	Drug: Etelcalcetide; Etelcalcetide has been shown to be safe and efficacious in treating adult CKD patients with SHPT by simultaneously controlling iPTH, Ca, and phosphorus and has recently been approved for use in adult patients with SHPT treated with hemodialysis in both the United States and Europe; Other Names: Parsabiv; Other: Standard of Care; Standard of care, which can include therapy with vitamin D sterols, Ca supplementation, and/or phosphate binders
Active Comparator: Standard of Care; Participants are randomized in a 5:1 ratio to receive etelcalcetide in addition to standard of care versus standard of care alone.	Other: Standard of Care; Standard of care, which can include therapy with vitamin D sterols, Ca supplementation, and/or phosphate binders

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Percentage of Participants Achieving a ≥ 30% Reduction from Baseline in Mean iPTH During the Efficacy Assessment Period (EAP)	Achievement of at least a 30% reduction from baseline in mean iPTH during the EAP (defined as weeks 20 through 27).	Baseline and Weeks 20-27
Percentage Change from Baseline in Mean iPTH During the EAP	Percent Change from Baseline in Mean iPTH During EAP (defined as weeks 20 through 27).	Baseline and Weeks 20-27

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in Tanner Stage	Changes in tanner stage at scheduled visits.	Week -2 and Week 27
Maximum Serum Concentration (Cmax) of Etelcalcetide	Cmax will be collected and reported for the etelcalcetide arm only.	10-30 minutes post dose on Day 1 and 10-30 minutes post dose on Weeks 5, 9, 13, 17, and 21
Minimum Serum Concentration (Cmin) of Etelcalcetide	Cmin will be collected and reported for the etelcalcetide arm only.	10-30 minutes post dose on Day 1 and 10-30 minutes post dose on Weeks 5, 9, 13, 17, and 21
Number of Participants who Experienced Adverse Events (AEs)	To characterize the safety of etelcalcetide treatment based on adverse events. Nature, frequency, severity, and relationship to treatment of all adverse events, including those of special interest reported during the trial.	Day 1 to 30 days after last dose of etelcalcetide (up to approximately 30 weeks)
Frequency of Hypocalcemia	Occurrence of hypocalcemia at any point in time, assessed by serum chemistry.	Up to approximately 30 Weeks
Number of Participants with Corrected Serum Ca Levels at any Time During the Trial	Occurrence of corrected serum Ca levels <8.0 mg/dL (2.0 mmol/L) for participants 2 to < 18 years of age and <8.6 mg/dL (2.15 mmol/L) for participants 28 days to <2 years of age during the trial.	Up to approximately 30 Weeks
Number of Participants with Serum Phosphorous Levels Below Normal by Age Group	Occurrence of serum phosphorous levels below the lower limit of normal by age group.	Up to approximately 30 Weeks
Number of Participants with Predialysis iPTH Levels Below Normal by Age Group	Occurrence of predialysis iPTH levels below the lower limit of normal by age group.	Up to approximately 30 Weeks
Change from Baseline in Systolic Blood Pressure	To characterize the safety of etelcalcetide treatment based on vital signs.	Week -2, Week -1, Day1, and Weeks 4, 8, 12, 16, 20, 24, and 27
Change from Baseline in Diastolic Blood Pressure	To characterize the safety of etelcalcetide treatment based on vital signs.	Week -2, Week -1, Day1, and Weeks 4, 8, 12, 16, 20, 24, and 27
Change from Baseline in Heart Rate	To characterize the safety of etelcalcetide treatment based on vital signs.	Week -2, Week -1, Day1, and Weeks 4, 8, 12, 16, 20, 24, and 27
Change in Height	Changes in height at scheduled visits.	Day 1 and Week 27
Change in Weight	Changes in weight at scheduled visits.	Week -2, Day 1, and Week 27
Number of Participants Achieving ≥ 30% Reduction in iPTH from Baseline on two Consecutive Visits	To characterize change in laboratory markers of CKD following etelcalcetide treatment.	Up to approximately 30 Weeks
Mean Change from Baseline in Predialysis iPTH from Baseline during the EAP	Mean change from baseline in predialysis iPTH during the EAP (defined as weeks 20 through 27).	Baseline and Weeks 20-27
Percentage Change from Baseline in Corrected Total Serum Ca from Baseline During the EAP	Percentage change from baseline in corrected total serum Ca during the EAP (defined as weeks 20 through 27).	Baseline and Weeks 20-27
Percentage Change from Baseline in Corrected Total Serum Phosphorous from Baseline During the EAP	Percentage change from baseline in corrected total serum phosphorous during the EAP (defined as weeks 20 through 27).	Baseline and Weeks 20-27

Collaborators and Investigators

• Sponsor: Amgen
• Investigators: Study Director: MD, Amgen

Publications and helpful links

Helpful Links

• AmgenTrials clinical trials website

Study record dates

Study Major Dates

• Study Start (Actual): April 29, 2019
• Primary Completion (Estimated): January 31, 2029
• Study Completion (Estimated): January 31, 2029

Study Registration Dates

• First Submitted: August 14, 2018
• First Submitted That Met QC Criteria: August 14, 2018
• First Posted (Actual): August 16, 2018

Study Record Updates

• Last Update Posted (Actual): February 27, 2026
• Last Update Submitted That Met QC Criteria: February 25, 2026
• Last Verified: February 1, 2026

More Information

Terms related to this study

• Keywords: pediatric; CKD; Chronic Kidney disease; sHPT; Secondary Hyperparathyroidism
• Additional Relevant MeSH Terms: Urogenital Diseases; Endocrine System Diseases; Pathologic Processes; Male Urogenital Diseases; Kidney Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Chronic Disease; Disease Attributes; Renal Insufficiency; Parathyroid Diseases; Hyperparathyroidism; Pathological Conditions, Signs and Symptoms; Renal Insufficiency, Chronic; Hyperparathyroidism, Secondary; Health Services Administration; Health Care Quality, Access, and Evaluation; Quality of Health Care; Quality Indicators, Health Care; Standard of Care; etelcalcetide hydrochloride
• Other Study ID Numbers: 20140315; 2017-002411-34 (EudraCT Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request
• IPD Sharing Time Frame: Data sharing requests relating to this trial will be considered beginning 18 months after the trial has ended and either 1) the product and indication have been granted marketing authorization in both the US and Europe or 2) clinical development for the product and/or indication discontinues and the data will not be submitted to regulatory authorities. There is no end date for eligibility to submit a data sharing request for this trial.
• IPD Sharing Access Criteria: Qualified researchers may submit a request containing the research objectives, the Amgen product(s) and Amgen trial/trials in scope, endpoints/outcomes of interest, statistical analysis plan, data requirements, publication plan, and qualifications of the researcher(s). In general, Amgen does not grant external requests for individual patient data for the purpose of re-evaluating safety and efficacy issues already addressed in the product labelling. Requests are reviewed by a committee of internal advisors. If not approved, a Data Sharing Independent Review Panel will arbitrate and make the final decision. Upon approval, information necessary to address the research question will be provided under the terms of a data sharing agreement. This may include anonymized individual patient data and/or available supporting documents, containing fragments of analysis code where provided in analysis specifications. Further details are available at the link below.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No