Study of Lupron Depot In The Treatment of Central Precocious Puberty

Abbott55 enrolled

Overview

The purpose of this study is to determine if Lupron (leuprolide acetate) is safe and effective in treating children with Central Precocious Puberty (CPP), and to assess long term effects of leuprolide acetate treatment after therapy is discontinued.

This study includes a Prestudy Period; a treatment period where subjects will receive treatment every 4 weeks until the initiation of puberty (age 12 for males and age 11 for females); a follow-up period where subjects will be observed every 6 months until physical and laboratory observations are at pubertal levels, then every 12 months for 5 years; lastly a final follow-up questionnaire is given to all subjects when they are at least 18 years old. At the treatment visits, efficacy assessments are Tanner staging (suppression of breast development in females and genital development in males), gonadotropins (LH and FSH), sex steroids (estradiol in females and testosterone in males), ratio of bone age to chronological age, adult height compared to a standard population and predicted mature height, and age and time to regular menses in females. This protocol will also capture data from the final questionnaire about female reproductive status at adulthood including the presence of regular menses and number of pregnancies.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Puberty, Precocious

Interventions

Lupron (leuprolide acetate)DRUG

Leuprolide acetate was administered monthly by intramuscular injection starting at 300 mcg/kg with adjustments of 3.75 mg upward, at subsequent clinic visits based on physical and laboratory parameters. Dosing continued until NDA was approved, or until subject no longer required leuprolide acetate to treat CPP.

Eligibility

Sex: ALLMax age: 10 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Clinical diagnosis of isosexual central precocious puberty with onset of Tanner scores of Stage II for breast or pubic hair earlier than age 8.0 years in girls or Stage II for pubic hair or genitalia earlier than 9.0 years in boys. * Confirmation of diagnosis by a pubertal response to a gonadotropin-releasing hormone (GnRH) stimulation test (LH \> 10 U/L at baseline). * Chronological age less than 9.0 years in girls or less than 10.0 years in boys at time of first dosing. * Bone age advanced at least 1 year beyond the chronological age at entry into the study. * The condition may be idiopathic or secondary to another lesion. If secondary, therapy of the primary condition will have been undertaken and stabilized. * No evidence of abnormal pituitary, adrenal, thyroid and gonadal function except for premature secretion of gonadotropins. Exclusion Criteria: * Irradiation to the central nervous system. * Prior therapy with medroxyprogesterone acetate and/or with any GnRH analog (including prior treatment with daily subcutaneous and depot formulations of leuprolide acetate).

Locations (9)

Site Reference ID/Investigator# 46673

Phoenix, Arizona, United States

Site Reference ID/Investigator# 46671

San Francisco, California, United States

Site Reference ID/Investigator# 14921

Stanford, California, United States

Outcomes

Primary Outcomes

Percentage of Subjects (n/N) With Suppression of Clinical Sexual Characteristics According to Tanner Staging (Breast Development in Females)

Suppression of clinical sexual characteristics was defined as regression (improvement) or no progression of breast development in females. Tanner staging is a scale of physical development that defines primary and secondary sex characteristics including size of breasts. The final visit occurred at a mean age +/- SD of 11.05 +/- 1.14 years (range, 6.96 to 12.95 years).

Time frame: Week 4, Week 48 (Year 1), yearly for 5 years (Week 240), and Final Visit

Percentage of Subjects (n/N) With Suppression of Clinical Sexual Characteristics According to Tanner Staging (Genital Development in Males)

Suppression of clinical sexual characteristics was defined as regression (improvement) or no progression of genital development in males. Tanner staging is a scale of physical development that defines primary and secondary sex characteristics including size of genitals. The final visit occurred at a mean age +/- SD of 12.35 +/-1.35 years (range, 10.71 to 14.07 years).

Time frame: Week 4, Week 48 (Year 1), yearly for 5 years (Week 240), and Final Visit

Secondary Outcomes

Mean Peak Stimulated Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH) Concentrations

Mean peak stimulated visit LH and FSH concentrations were assessed according to the DELFIA (registered trademark) assay. The final visit for measurement of both hormone concentrations occurred at a mean age +/- SD of 11.13 +/- 1.23 (range, 6.73 to 14.07) years.

Time frame: Baseline, Weeks 4, 12, 24, 48 (Year 1), yearly for 5 years (Week 240), and Final Visit

Mean Stimulated Estradiol Concentrations in Females

Mean estradiol concentrations were assessed according to the DELFIA (registered trademark) assay. The lower limit of quantitation for estradiol is 5 pg/mL and measurements below this limit are given a value of 5 pg/mL. The final visit for measurement estradiol concentrations occurred at a mean age +/- SD of 10.93 +/- 1.27 (range, 5.59 to 13.24) years.

Data from ClinicalTrials.gov

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