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Puberty, PrecociousPhase 3NCT00635817

A Study of Leuprolide 11.25 mg and 30 mg Administered Every 3 Months to Treat Central Precocious Puberty

A Phase 3 study testing Leuprolide acetate 11.25 mg and Leuprolide acetate 30 mg in people with Puberty, Precocious, run by Abbott at 25 sites in 2 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to determine if 11.25 and 30 mg formulations of leuprolide are effective in treating children with Central Precocious Puberty (CPP). Read more about this study

Who is it for?
Ages 2 to 11 years
Conditions the study is for
Puberty, Precocious
What is being tested?
Leuprolide acetate 11.25 mg and Leuprolide acetate 30 mg
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
84 participants
Where
25 sitesin 2 countries
Study dates
Jun 2008to Jun 2010
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 2 to 11 years
  • All sexes
  • No healthy volunteers
  • Child

Who may be able to join

  • Subject has a clinical diagnosis of CPP.
  • Eligible to receive at least 6 mo of therapy to treat CPP after study entry.
  • Bone age advanced at least 1 year beyond the chronological age at time of diagnosis or first treatment.
  • In general good health with no uncontrolled, clinically significant disease which would interfere with bone maturation or mask the objectives of this protocol as assessed by the investigator.
  • Additional criteria for subjects who have not had previous treatment:
  • Girls 2-8 years inclusive or Boys 2-9 years inclusive at Day 1.
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  • Has pretreatment pubertal response to leuprolide acetate stimulation (luteinizing hormone ≥8 mIU/mL) at Screening.
  • Breast pubertal staging of at least 2 in girls; testicular volume of at least 4 cc or testicular length greater than 2.5 cm in boys at Screening.
  • Additional criteria for subjects previously treated:
  • Girls 2-10 years inclusive or boys 2-11 years inclusive at Day 1.
  • Must have been on standard gonadotropin releasing hormone analog therapy for at least the 6 mo prior to Day 1.
  • Has documented maintenance of luteinizing hormone suppression as evidenced by peak stimulated level <4 mIU/mL at Screening.

Who cannot join

  • Incomplete precocious puberty (premature thelarche, premature adrenarche).
  • Peripheral precocious puberty: gonadal or adrenal tumors, congenital adrenal hyperplasia, testotoxicosis in boys, human chorionic gonadotropin secreting tumor or McCune-Albright syndrome in girls.
  • Evidence of any abnormal pituitary, hypothalamic, adrenal, thyroid and gonadal function other than premature secretion of gonadotropins not adequately controlled.
  • Unstable intracranial tumors (unresponsive to treatment/expanding) except hamartoma.
  • Previous treatment with GnRHa therapy requiring leuprolide acetate for depot suspension >15 mg monthly.
  • Bone age >13 years for girls and >14 years for boys.
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  • Any other condition interfering with growth, ie, skeletal dysplasia, cerebral palsy.
  • Chronic illness requiring treatment that may interfere with growth, ie, chronic steroid use, renal failure, moderate to severe scoliosis.
  • Diagnosis of short stature, ie more than 2.25 standard deviations below the mean height for age (growth chart measurement).
  • Prior or current therapy with medroxyprogesterone acetate or growth hormone.
  • Has an abnormal laboratory value suggesting a clinically significant underlying disease .
  • Creatinine >1.5 mg/dL, alanine aminotransferase and/or aspartate aminotransferase >2.0 x upper limit of normal, or total bilirubin >2.0 mg/dL with aspartate aminotransferase/alanine aminotransferase elevated above normal limits.
  • Positive pregnancy test.
  • Known hypersensitivity to study medication or its excipients.
  • Participation in another drug research within 3 mo of enrollment into this study.
  • Prior or current therapy with insulin-like growth factor-1.
  • Use of an estrogen preparation within 2 mo prior to Day 1.

Trial locations and contacts

25 sites in 2 countries.

25 sites in 2 countries

United States21 sites
  • Site Reference ID/Investigator# 8765

    Birmingham, Alabama, 35233

  • Site Reference ID/Investigator# 8771

    Gainesville, Florida, 32608

  • Site Reference ID/Investigator# 8749

    Greenwood Village, Colorado, 80111

  • Site Reference ID/Investigator# 8763

    Hershey, Pennsylvania, 17033

  • Site Reference ID/Investigator# 8752

    Indianapolis, Indiana, 46202

  • Site Reference ID/Investigator# 8764

    Jacksonville, Florida, 32207

  • Site Reference ID/Investigator# 8759

    Kansas City, Missouri, 64108

  • Site Reference ID/Investigator# 11522

    Long Beach, California, 90806

  • Site Reference ID/Investigator# 8756

    Los Angeles, California, 90027

  • Site Reference ID/Investigator# 8768

    Minneapolis, Minnesota, 55455

  • Site Reference ID/Investigator# 8750

    Oklahoma City, Oklahoma, 73104

  • Site Reference ID/Investigator# 17621

    Pensacola, Florida, 32504

  • Site Reference ID/Investigator# 17341

    Saint Paul, Minnesota, 55102

  • Site Reference ID/Investigator# 8754

    Salt Lake City, Utah, 84108

  • Site Reference ID/Investigator# 8755

    San Diego, California, 92123

  • Site Reference ID/Investigator# 8761

    San Diego, California, 92123

  • Site Reference ID/Investigator# 8762

    Seattle, Washington, 98104

  • Site Reference ID/Investigator# 8753

    Seattle, Washington, 98105

  • Site Reference ID/Investigator# 8766

    Shreveport, Louisiana, 71103

  • Site Reference ID/Investigator# 8772

    Stanford, California, 94305-5208

  • Site Reference ID/Investigator# 8760

    Tulsa, Oklahoma, 74135

Other trials in United States

Puerto Rico4 sites
  • Site Reference ID/Investigator# 17922

    Bayamón, 00960

  • Site Reference ID/Investigator# 17923

    Ponce, 00717-2116

  • Site Reference ID/Investigator# 18242

    San Juan, 00936-5067

  • Site Reference ID/Investigator# 19661

    San Juan, 00936-8344

Other trials in Puerto Rico

About this study

Official title: A Phase 3, Randomized, Multi-Center, Open-Label Study to Evaluate the Efficacy and Safety of Leuprolide Acetate 11.25 and 30 mg Formulations in Children With Central Precocious Puberty

The purpose of this study is to determine if 11.25 and 30 mg formulations of leuprolide are effective in treating children with Central Precocious Puberty (CPP).

Read the detailed description

Study Design:

A total of 80 children with confirmed CPP were planned to be enrolled and randomized in a 1:1 ratio to receive 2 injections of either leuprolide acetate 11.25 mg or 30 mg depot formulation, each injection administered 3 mo apart (6 mo of treatment):

This study includes a 4-week Screening Period, two 3-mo treatment cycles, and a posttreatment follow-up period (12 weeks following the Mo 6 visit). Study visits will occur at Screening, Day 1, Week 2 (only for subjects participating in the pharmacokinetic subset), Mo 1, 2, 3, Mo 6/Early Termination, and 12 weeks later, for the Posttreatment Follow-up Visit.

This study was conducted at 18 sites in the United States and 4 sites in Puerto Rico.

Being tested
Leuprolide acetate 11.25 mg, Leuprolide acetate 30 mg
Keywords
CPP, central precocious puberty, pediatrics, suppression of luteinizing hormone, Lupron, leuprolide acetate, depot formulation, GnRHa, GnRH agonist, GnRH analog, luteinizing hormone
Medical subject headings
Puberty, Precocious

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Leuprolide acetate 11.25 mgDrug

    Also called ABT-818, leuprolide acetate, Lupron

    Two intramuscular injections of leuprolide acetate for depot suspension 11.25 mg administered 3 mo apart.

  • Leuprolide acetate 30 mgDrug

    Also called ABT-818, leuprolide acetate, Lupron

    Two intramuscular injections of leuprolide acetate for depot suspension 30 mg administered 3 mo apart.

Study groups in NCT00635817
Study groupRoleWhat they receive
Leuprolide acetate 11.25 mgExperimentalThere are 2 arms that received leuprolide acetate 11.25 mg. Subjects who are treatment naive to leuprolide acetate are designated to be in Arm A and subjects who have previously been treated with leuprolide acetate are designated to be in Arm B.
Receives: Drug: Leuprolide acetate 11.25 mg
Leuprolide acetate 30 mgExperimentalThere are 2 arms that received leuprolide acetate 30 mg. Subjects who are treatment naive to leuprolide acetate are designated to be in Arm C and subjects who have previously been treated with leuprolide acetate are designated to be in Arm D.
Receives: Drug: Leuprolide acetate 30 mg

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Participants With Suppression of Peak Stimulated Luteinizing Hormone (<4 mIU/mL) From Month 2 Through Month 6

    Percentage of participants with suppression of peak stimulated luteinizing hormone that was measured after a gonadotropin-releasing hormone agonist (GnRHa) stimulation test at Month (Mo) 2, 3, and 6. The analysis was performed according to a life table method. Subjects who withdrew without peak-stimulated luteinizing hormone >= 4 mIU/mL were censored at their last measurement of peak-stimulated luteinizing hormone.

    Measured: Month 2 through 6

Secondary outcomes (7)
  1. Percentage of Participants With Suppression of Basal Estradiol <20 pg/mL by Visit

    Percentage of participants with suppression of estradiol, out of the number of girls with at least 1 estradiol measurement at each visit (n/N%). Only girls are analyzed in this outcome measure. Observed data were used with no imputation for missing data.

    Measured: Month 1, 2, 3 and 6

  2. Percentage of Participants With Suppression of Testosterone in <30 ng/dL by Visit

    Percentage of participants with suppression of testosterone, out of the number of boys with at least 1 testosterone measurement at each visit (n/N%). Only boys are analyzed in this outcome measure. Observed data were used with no imputation for missing data.

    Measured: Month 1, 2, 3 and 6

  3. Peak-stimulated Luteinizing Hormone Concentration by Visit

    Observed data were used with no imputation for missing data.

    Measured: Baseline, Month 1, 2, 3 and 6

  4. Percentage of Participants With Suppression of the Physical Signs of Puberty (Breast Development) at Month 6

    Percentage of participants with suppression of breast development, out of the number of girls with pubertal staging of breast development (n/N%). Only girls are analyzed in this outcome measure. Breast development was rated from Stage 1 (early development) through Stage 5 (full development) according to a Tanner Staging pictogram. Girls entering the study with fully developed breasts (Stage 5) were excluded from this analysis. Observed data were used with no imputation for missing data.

    Measured: Month 6

  5. Percentage of Participants With Suppression of the Physical Signs of Puberty (Testicular Volume and Genital Development) at Month 6

    Percentage of participants with suppression of genital development and testicular volume, out of the number of boys with pubertal staging of genital development or testicular volume (n/N%). Only boys are analyzed in this outcome measure. External genital development (testes and penis) was rated from Stage 1 (early development) through Stage 5 (full development) according to a Tanner Staging pictogram. Boys entering the study with fully developed genitals (Stage 5) were excluded from this analysis. Observed data were used with no imputation for missing data.

    Measured: Month 6

  6. Change From Baseline in Incremental Growth Rate (cm/Year) at Month 6

    The growth rate at baseline was the growth rate during the last year before the start of treatment and was calculated with the measurement closest to Day -336 (before Day -30) and the measurement up to Day 1. Growth rate at Month 6 was defined as the ratio of the change in height from Day 1 to the change in chronological age, with an approximate 6-month interval between the 2 height measurements. Observed data were used with no imputation for missing data.

    Measured: Baseline and Month 6

  7. Ratio of Change From Baseline in Bone Age/Change From Baseline in Chronological Age at Month 6

    The ratio at Month 6 was calculated as (bone age at Month 6 - bone age at baseline)/(chronological age at Month 6 - chronological age at baseline). Observed data were used with no imputation for missing data. Baseline bone-age radiograph was performed at or within 3 months of the Screening Visit.

    Measured: Baseline to Month 6

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Mar 2008 (estimated)
  2. Study startJun 2008
  3. Primary completionJan 2010
  4. Study completionJun 2010

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
84 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00635817
Sponsor's protocol ID
L-CP07-167
Status last verified
Oct 2011
First submitted
7 Mar 2008
Last updated
2 Nov 2011
Data monitoring committee
No

Publications

  • Lim CN, Al Yacoub ON, Mostafa NM, Salem AH. Fixed Dosing of Leuprolide Acetate, a GnRH Agonist, in Children with Central Precocious Puberty: A Population Pharmacokinetic Justification. Paediatr Drugs. 2026 May;28(3):295-305. doi: 10.1007/s40272-025-00733-2. Epub 2026 Mar 13.

    PubMed 41824265
  • Lee PA, Klein K, Mauras N, Neely EK, Bloch CA, Larsen L, Mattia-Goldberg C, Chwalisz K. Efficacy and safety of leuprolide acetate 3-month depot 11.25 milligrams or 30 milligrams for the treatment of central precocious puberty. J Clin Endocrinol Metab. 2012 May;97(5):1572-80. doi: 10.1210/jc.2011-2704. Epub 2012 Feb 16.

    PubMed 22344198

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Leuprolide acetate 11.25 mg and Leuprolide acetate 30 mg in people with Puberty, Precocious, run by Abbott at 25 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 17 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 2 Nov 2011. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 25 sites in United States, Puerto Rico. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 9 Feb 2011). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants With Suppression of Peak Stimulated Luteinizing Hormone (<4 mIU/mL) From Month 2 Through Month 6 (time frame: Month 2 through 6). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00635817, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Nov 2011.

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