52 Week Study of Safety, PK, & Efficacy of XYOSTED® for Testosterone Replacement in Male Adolescents With Hypogonadism

Launched by HALOZYME THERAPEUTICS · Nov 13, 2024

Keywords

ClinConnect Summary

This clinical trial is studying the safety and effectiveness of a treatment called XYOSTED for boys aged 12 to 18 who have a condition known as hypogonadism, which means their bodies do not produce enough testosterone. The trial will last for 52 weeks and aims to see if XYOSTED can help these boys start or continue going through puberty. To be eligible, participants must have a diagnosed testosterone deficiency and be willing to work with their parents or guardians to participate in the study. They also need to weigh at least 40 kg and have a body mass index (BMI) above the 5th percentile for their age.

If a boy is eligible and chooses to participate, he will receive XYOSTED injections and will be monitored regularly for safety and effectiveness. This includes checking testosterone levels and assessing any side effects. It's important to know that there are certain conditions that would prevent someone from participating, such as heart problems or certain allergies. Overall, this trial seeks to help improve treatment options for boys facing challenges with testosterone deficiency during their adolescent years.

Gender

MALE

Eligibility criteria

• Inclusion Criteria:
• • 1. Diagnosed with a deficiency or absence of endogenous testosterone due to primary or secondary hypogonadism of a known etiology. Children with combined hormone deficiencies are permitted to enroll (but the child must already be receiving treatment for concomitant hormonal deficiencies)
• • 2. Participants receiving prior testosterone treatment must be receiving a stable dose for at least 12 weeks prior to Screening
• • 3. Have parent(s) or a legal guardian who will voluntarily provide written informed consent for the child to participate in the study
• • 4. Willing to provide assent for participation in the study
• • 5. Be a male 12 to \< 18 years of age at the time of consent/assent
• • 6. Have Legally Authorized Representative who is able to understand and comply with all study procedures and agrees to have the child participate in the study program as outlined in the protocol
• • 7. Requires chronic pharmacologic support for the initiation and/or continuation of pubertal maturation
• • 8. Have a body mass index (BMI)-for-age greater than the 5th percentile and weigh ≥ 40 kg
• 9. If sexually active with a female partner of child-bearing potential, agrees to:
• • 1. Practice true abstinence including 30 days after the last IP administration, or,
• • 2. Use 2 adequate forms of highly effective contraception, one of which should be a physical barrier, during the study and for 30 days after the last IP administration.
• Exclusion Criteria:
• • 1. Has abnormal thyroid function tests at Screening
• • 2. Has suspected or known constitutional growth delay in growth and puberty (CDGP)
• • 3. Has evidence of possible nutritional or gastrointestinal disorder that may impact growth (e.g., abrupt weight loss within the 3 months prior to Screening, unmanaged celiac disease, inflammatory bowel disease)
• • 4. Has a known allergy or hypersensitivity to XYOSTED, or to any of its ingredients (testosterone enanthate and sesame oil)
• • 5. Participants receiving prior treatment with testosterone who are not on a stable dose for at least 12 weeks prior to Screening.
• • 6. Is receiving testosterone through a transdermal patch or gel in the 12 weeks prior to Screening.
• • 7. Has an allergy to foods or products containing sesame seeds or sesame oil
• • 8. Has Stage 1 hypertension, defined as the average of 2 or more seated right arm BP measurements exceeding the 95th percentile for age, sex, and height, or SBP ≥ 130 mm Hg and/or DBP ≥ 80 mm Hg (Flynn et al., 2017, in Appendix B), at Screening or Day 1.
• • 9. Has a clinically significant abnormal clinical laboratory test value at Screening, as determined by the Investigator including hematocrit ≥ 48%
• • 10. Has a history of deep venous thrombosis or pulmonary embolism
• • 11. Has evidence of a clinically significant 12-lead electrocardiogram (ECG) abnormality at Screening, as determined by the Investigator
• • 12. Has a current suspected or diagnosed (and unresected) tumor of the pituitary gland with the exception of Rathke's cleft cyst or a stable non-functioning pituitary microadenoma (ie, lesion size \< 10 mm that has not increased in size over a period of 1 year on repeat imaging), as determined by the Investigator
• • 13. Has an active malignancy or has received treatment for a malignancy within the 12 months before Screening
• • 14. Is currently receiving antipsychotic and/or selective serotonin reuptake inhibitor (SSRI) medications
• • 15. Is receiving any other medication or has a condition that would preclude safe participation in the study or confound the evaluation of safety, as determined by the Investigator
• • 16. Has a history of suicidal behavior (i.e., actions intended to harm oneself), suicidal ideation (ie, thoughts and plans about suicide), or suicide attempts
• • 17. Has affirmative responses on the Columbia Suicide Severity Rating Scale (C-SSRS) questionnaire
• • 18. Is currently taking supraphysiologic doses of systemic glucocorticoids for more than 3 weeks, except for intermittent short courses of exogenous glucocorticoids as needed for the treatment of asthma
• • 19. Has received any other investigational compound within 1 month prior to screening or 5 half-lives of the investigational product (whichever is longer)
• • 20. Has received gonadotropin-releasing hormone (GnRH) agonists, aromatase inhibitors, androgens (eg, dehydroepiandrosterone \[DHEA\]), anabolic steroids such as oxandrolone, or other sex steroids within 12 months before the Screening visit, or would require these treatments at any time during the study.
• • 21. Receiving cytochrome P450 (CYP) 3A4 or P glycoprotein (P-gp) inhibitors/inducers or medications that are metabolized by CYP3A4 or P-gp within 30 days of enrolment.
• • 22. Has a history of alcohol or drug abuse
• • 23. Has a history or clinical manifestations of significant renal, hepatic, cardiovascular, metabolic, neurologic, psychiatric, or other conditions that would preclude participation in the study, as determined by the Investigator
• • 24. Has chronic urticaria or dermatographism
• • 25. Has 25-hydroxy-vitamin D blood level \< 20 ng/mL. Participants with initial vitamin D blood measurement \< 20 ng/mL may receive supplementation per clinical practice during Screening and be rescreened up to 2 times