A Study to Assess the Safety and Efficacy of Enantone (Leuprorelin) in Central Precocious Puberty (CPP) Among Chinese Participants

Takeda108 enrolled

Overview

The purpose of this study is to evaluate the long-term safety and efficacy of Enantone in the treatment of CPP in Chinese participants.

The drug being evaluated in this study is called Enantone (leuprorelin). Enantone is used to treat children who have CPP. This study will look at long term safety and efficacy of leuprorelin in the treatment of Chinese participants with CPP. The study will enroll approximately 300 participants. All participants who have received leuprorelin 30 mcg/kg to \<90 mcg/kg or 90 mcg/kg to 180 mcg/kg per body weight, injection, subcutaneously, every 4 weeks up to at least 9 continuous months during the index period from September 1st 1998 to September 30th 2018 will be observed. This multi-center trial will be conducted in China. Data will be collected over period of 20 months.

Study Type

OBSERVATIONAL

Enrollment

108

Conditions

Central Precocious Puberty

Interventions

EnantoneDRUG

Enantone suspension for injection

GnRH agonistDRUG

A non-Enantone GnRH agonist

Eligibility

Sex: ALL

Medical Language ↔ Plain English

Inclusion Criteria: 1. Has diagnosis of idiopathic CPP. 2. Has been treated with leuprorelin acetate (Enantone) for at least 9 continuous months of therapy with either a stable dose of high dose (greater than or equal to \[\>=\] 90 mcg/kg up to 180 mcg/kg) or low dose (\< 90 mcg/kg down to 30 mcg/kg). 3. Has initiated and completed treatment during the index period from September 1st 1998 to September 30th 2018. 4. Have the following information prior to initiation of enantone and at least one record of each of the following parameters at the end of enantone treatment in the medical records: Tanner staging, estradiol or testosterone level, and FSH and LH level. The participant should have at least one record of bone age prior to the initiation gonadotropin releasing hormone analogs (GnRHa) therapy with enantone to support the diagnosis of CPP. In addition, should have at least one record of bone age during treatment with enantone. Exclusion Criteria: 1. Has been treated with leuprorelin acetate or any other GnRHa for conditions other than CPP. 2. Has used any other GnRHa products for CPP treatment prior to initiation of enantone therapy. 3. CPP participants with identified etiology, such as brain tumor or cranial irradiation.

Locations (6)

The Children's Hospital, Zhejiang University School of Medicine

Wuhan, Hubei, China

Childrens Hospital of Hunan province

Changsha, Hunan, China

Jiangsu Province Hosptial

Nanjing, Jiangsu, China

Children's Hospital of Jiangxi province

Nanchang, Jiangxi, China

Outcomes

Primary Outcomes

Number of Participants With at Least One Treatment Emergent Adverse Event (TEAE) and Serious Adverse Event (SAE) During Enantone Treatment Phase

A TEAE is any untoward medical occurrence in a subject administered a medicinal product and which does not necessarily have to have a causal relationship with this treatment. An SAE is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly.

Time frame: During treatment with and up to 30 days post last dose of Enantone (the mean duration of Enantone exposure was 22.3 months, ranging from 10.1 to 52.4 months)

Number of Participants With at Least One Treatment Emergent Adverse (TEAE) and Serious Adverse Event (SAE) During Follow-up Phase

Time frame: Mean duration of follow-up=8.75 months (range: 1.9-29.5 months) for No longer treated for CPP group; 10.80 months (range: 2.8-20.5 months) for Treated with Non-Enantone GnRHa group after treatment with Enantone (while on another GnRHa)

Percentage of Participants Who Had Regression or No Progression in Tanner Staging at the End of Enantone Treatment Phase

Tanner Stage is used to measure pubertal development. Female (F) and male (M) participants were evaluated for breast development and genital development respectively and both genders for pubic hair development. Tanner Stage is based on progression through 5-stages. Participants were classified as having progression if either breast/genitals or pubic hair progression were present. Otherwise participant is classified as regression or no progression.

Time frame: The mean duration of Enantone exposure was 22.3 months, ranging from 10.1 to 52.4 months

Data from ClinicalTrials.gov

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Secondary Outcomes

Percentage of Participants With Post Stimulation Test Peak Values, for Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH), Suppressed Below Upper Limit Value (ULV) at the End of Enantone Treatment Phase

The LH suppression is defined as peak LH ≤2 U/L for female and peak LH ≤2.7 U/L for male. The FSH suppression is defined as peak FSH ≤6.7 U/L for female and peak FSH ≤3.7 U/L for male. Post Stimulation Test, the peak values for LH and FSH suppression below Upper Limit Value (ULV) are reported.

Time frame: The mean duration of Enantone exposure was 22.3 months, ranging from 10.1 to 52.4 months

Time frame: No longer treated for CPP group - Month: 27 (766- 855 days) post last dose of Enantone; Treated with Non-Enantone GnRHa group - Month 21 (586- 675 days) post last dose of Enantone

Percentage of Participants With Value, for Estradiol or Testosterone, Suppressed Below Upper Limit Value (ULV) at the End of Enantone Treatment Phase

Estradiol or Testosterone, suppressed below Upper Limit Value (ULV) were reported. The ULV for estradiol and testosterone were 20 pg/mL and 7.34 nmol/L, respectively.

Time frame: The mean duration of Enantone exposure was 22.3 months, ranging from 10.1 to 52.4 months

Percentage of Participants With Value, for Estradiol or Testosterone, Suppressed Below Upper Limit Value (ULV) at the End of Follow-Up Phase

Estradiol or Testosterone, suppressed below Upper Limit Value (ULV) were reported. The ULV for estradiol and testosterone were 20 pg/mL and 7.34 nmol/L, respectively.

Time frame: No longer treated for CPP group-Month: 27 (766-855 days) post last dose of Enantone; Treated with Non-Enantone GnRHa group-Month 21 (586-675 days) post last dose of Enantone

Percentage of Participants With Decease of Ratio of Bone Age to Chronological Age at the End of Enantone Treatment Phase

Bone age (BA) was estimated using an X-ray. Chronological age (CA) at the date of corresponding X-ray (Date of X-ray - Date of birth)/365.25. Ratio of BA/CA was calculated.

Time frame: The mean duration of Enantone exposure was 22.3 months, ranging from 10.1 to 52.4 months

Percentage of Participants With Decease of Ratio of Bone Age to Chronological Age at the End of Follow-up Phase

Bone age (BA) was estimated using an X-ray. Chronological age (CA) at the date of corresponding X-ray (Date of X-ray - Date of birth)/365.25. Ratio of BA/CA was calculated.

Time frame: No longer treated for CPP group - Month: 27 (766- 855 days) post last dose of Enantone; Treated with Non-Enantone GnRHa group - Month 18 (496-585 days) post last dose of Enantone