A Prospective Observational Sub-Study of the Global Hypophosphatasia Registry to Describe the Potential Risk of Immune-Mediated Loss of Pharmacological Effect of Asfotase Alfa in Participants With Hypophosphatasia

In this prospective observational sub-study, participants with pediatric-onset hypophosphatasia (HPP) (perinatal/infantile- or juvenile-onset) of any age will be followed for a minimum of 5 years at sites in the United States and potentially 1 or 2 other countries.

CT.gov Identifier
NCT05234567
EudraCT Identifier
N/A
CTIS:
N/A
Sponsor
Alexion Pharmaceuticals, Inc.
Collaborator
N/A
Study Contact Information
N/A
Recruiting
Contact Us

Study Details

Diseases
Hypophosphatasia
Study Drug
Asfotase alfa
See More
Asfotase Alfa
Genes
ALPL
Study Dates
Aug 2022 - Jul 2028
Sex
Ignored
Age
N/A
Inclusion and Exclusion Criteria
Inclusion Criteria:
  • * Any age or sex with a confirmed diagnosis of pediatric-onset HPP (that is, first HPP sign or symptom presented at < 18 years of age).
  • * Currently receiving asfotase alfa treatment at Enrollment (not treatment-naïve) or the Physician has decided to resume (not treatment-naïve) or start (treatment-naïve) the participant's asfotase alfa treatment within 6 months after Enrollment.
  • * Participant must have documented alkaline phosphatase (ALP) activity below the lower limit of normal for age and sex, and a documented ALPL gene mutation (Note: An exception is made for infants with clinical features of HPP plus low ALP who need to start asfotase alfa treatment right away, at the Physician's discretion, but do not yet have a genetic result. In this case, ALPL gene documentation is not required at the time of sub-study enrollment but should be documented within 6 months after Enrollment).
  • * Participant or participant's parent/legally authorized representative is able to read and/or understand the informed consent and study questionnaires in the local language.
  • * Participant or participant's parent/legally authorized representative must be willing and able to give signed informed consent for this sub-study, and the participant must be willing to give written informed assent, if appropriate and required by local regulations.
Exclusion Criteria:
  • Currently participating in an Alexion-sponsored interventional clinical study. Participants who have concluded participation in an Alexion-sponsored asfotase alfa clinical study are eligible to enroll in this sub-study.

Protocol Summary

In this prospective observational sub-study, participants with pediatric-onset hypophosphatasia (HPP) (perinatal/infantile- or juvenile-onset) of any age will be followed for a minimum of 5 years at sites in the United States and potentially 1 or 2 other countries.

Study Locations

To view all trial locations, click here

Contact Us About More Information for the Clinical Trial Concierge Service

Natera’s Clinical Trial Concierge Program is comprised of a dedicated team that helps connect providers and patients with appropriate clinical trials. To learn more about a trial offered through this service, please complete the form below.  

Fields marked with asterisk (*) are mandatory.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.