Product Manual (.pdf)

Description

This ELISA (enzyme-linked immunosorbent assay) kit is intended for the quantitative determination of both human osteocalcin (1-49) and osteocalcin (1-43), also referred to as N-terminal & mid-regional osteocalcin, in serum or plasma samples. This test is useful for assessing bone formation activity in patients associated with changes in the rate of bone turnover in metabolic bone diseases, such as osteoporosis, primary hyperparathyroidism, hyperthroidism, Paget's disease, and renal osteodystrophy.

For research use only. Not for use in diagnostics procedures.

Background

Osteocalcin (also known as bone Gla protein/BGP) is protein found in bone and dentin. Its synthesis involves vitamin K and vitamin D3; newly synthesized osteocalcin is partioally released into the blood stream and the rest incorporatedthe bone matrix. Both osteocalcin (1-49) and its fragments, including osteocalcin (1-43) are released into the blood stream.

Serum osteocalcin (1-43) is also generated by the catabolic breakdown of osteocalcin (1-49) in circulation, liver, and kidney. This process can also occur by in vitro degradation during storage of samples because of a labile 6-amino acid C-terminal sequence that is easily cleaved at room temperature. Several studies have confirmed that measurement of the more stable N-terminal and mid-regional osteocalcin (osteocalcin 1-43/49) as being more clinically useful, which may contribute to a more accurate assessment of the bone turnover rate.

Because osteocalcin is produced by osteoblasts, it is often used as a biochemical marker, or biomarker, for the bone formation process. It has been routinely observed that high serum osteocalcin levels are relatively well correlated with increases in bone mineral density (BMD) during treatment with anabolic bone formation drugs for osteoporosis. In many studies, osteocalcin is used as a preliminary biomarker on the effectiveness of a given drug on bone formation.

Specifications

Catalog no.

Target:

Species

Method

Tests Per Kit

Detection

Sensitivity / LLOD

Dynamic Range

Total Incubation Time

Sample Type

Sample Volume

Storage Temperature

KTR-809

Osteocalcin (1-43/49)

Human

Sandwich ELISA

96 tests

Colorimetric

0.31 ng /mL

0 - 64 ng/mL

1 hour, 20 minutes

Serum or plasma

50 µL

2-8 °C