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Related Experiment Videos

[Osteocalcin].

M Galli, M Caniggia

    Minerva Medica
    |November 3, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Osteocalin (BGP), a vitamin K-dependent protein, is a reliable indicator of osteoblast activity. This study establishes normal plasma BGP ranges and reveals a positive correlation between BGP levels and age.

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    Area of Science:

    • Biochemistry
    • Endocrinology
    • Orthopedics

    Context:

    • Osteocalin (bone gamma-carboxyglutamic acid-containing protein, BGP) is a vitamin K-dependent protein found in bone.
    • Studies indicate BGP binds to hydroxyapatite, is synthesized by osteoblasts, and circulates before bone binding, with rapid turnover and renal clearance.
    • BGP is considered a sensitive marker for osteoblast activity and can be measured in biological fluids.

    Purpose:

    • To establish normal plasma osteocalin (BGP) levels in adults and adolescents using a new radioimmunoassay.
    • To investigate the relationship between plasma BGP levels and age, sex, and various bone metabolic disorders.
    • To evaluate the clinical utility of plasma BGP measurements in conditions like Paget's disease and hyperparathyroidism.

    Summary:

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  • A new radioimmunoassay was used to measure plasma osteocalin levels in 72 normal adults (18-84 years) and 3 adolescents.
  • Normal adult plasma BGP range was 4.1-7.84 ng/ml, with no significant sex differences but higher levels in adolescents compared to adults.
  • A significant positive correlation was observed between plasma BGP levels and age in both males and females (r=0.613, p<0.001).
  • Patients with Paget's disease and hyperparathyroidism exhibited elevated BGP levels, which decreased post-treatment in hyperparathyroidism cases.

    • Impact:

    • This study provides reference ranges for plasma osteocalin, aiding in the diagnosis and monitoring of bone metabolic diseases.
    • The findings highlight a significant age-related increase in osteocalin levels, suggesting potential roles in bone aging.
    • Osteocalin measurement emerges as a valuable tool for assessing osteoblast function and managing bone disorders.