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Diagnostic value of low alkaline phosphatase activity in diagnosing hypophosphatasia (HPP)

Diagnostic value of low alkaline phosphatase activity in diagnosing hypophosphatasia (HPP) - HPP study

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
DRKS
Registry ID
DRKS00013270
Enrollment
50
Registered
2018-02-22
Start date
2017-10-26
Completion date
Unknown
Last updated
2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

E83.38

Interventions

Group 1: Laboratory data of children from the Freiburg area are examined for the presence of reduced AP activity and their status as an indicator for the presence of HPP in children is evaluated. Pati

Sponsors

Zentrum für Kinder und Jugendmedizin Universitätsklinik Freiburg
Lead Sponsor

Eligibility

Sex/Gender
All
Age
No minimum to 18 Years

Inclusion criteria

Inclusion criteria: Signed informed consent Age <18 years at the time of determination of AP activity AP activity <age and gender specific limit

Exclusion criteria

Exclusion criteria: Patients who do not meet the age requirement Patients with normal AP activity Patients with a diagnosis of primary oncological disease, or anemia, or hypothyroidism, or anorexia nervosa, or celiac disease, or Wilson's disease Patients with Z.n. Bulk transfusion of blood products Patients with magnesium deficiency or zinc deficiency

Design outcomes

Primary

MeasureTime frame
Evaluation of decreased serum PA as an indicator of the presence of HPP by using a diagnostic algorithm in pediatric patients

Secondary

MeasureTime frame
Correlations between clinical symptoms, muscle strength, enzyme activity, concentration of metabolite metabolites in serum / urine (and genotype), if a sufficient number of patients can be identified. Better characterization of the disease by identifying patients HPP Identification of other causes of decreased AP activity and evaluation of their frequency distribution.

Countries

Germany

Contacts

Public ContactCorinna Brichta

Zentrum für Kinder- und Jugendmedizin Uniklinik Freiburg

corinna.brichta@uniklinik-freiburg.de0761 27044300

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026