Abstract
A homologous radioreceptor assay using recombinant bovine growth hormone and bovine liver membranes is described. The total specific binding of 125I-labeled recombinant bovine growth hormone to the 100000 × g pellet was 48% in 24 h at 25 °C. Hormone binding was partially reversible, with 40% of the radiolabeled hormone being irreversibly bound. The amount of specific binding varied with assay pH, with the optimum occurring at pH 7.8. Specific binding was temperature-dependent, with greater specific binding occurring at 25°C than at 5°C or 37°C during a 24 h period. Recombinant bovine growth hormone, human growth hormone, ovine growth hormone and recombinant porcine growth hormone competed effectively with 125I-labeled recombinant bovine growth hormone for binding sites, while bovine prolactin and ovine prolactin were needed in amounts 106-fold the concentration of recombinant bovine growth hormone to displace the radiolabeled hormone. Surprisingly, human placental lactogen did not displace the radiolabeled hormone.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 109-116 |
| Number of pages | 8 |
| Journal | Molecular and Cellular Endocrinology |
| Volume | 38 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - 1984 |
| Externally published | Yes |
Fingerprint
Keywords
- bovine growth hormone
- growth hormone receptor
- homologous hormone-receptor system
- radioreceptor assay
- somatogenic
ASJC Scopus subject areas
- Endocrinology
- Endocrinology, Diabetes and Metabolism
Cite this
Homologous somatotropin radioreceptor assay utilizing recombinant bovine growth hormone. / Haro, Luis S.; Collier, Robert J; Talamantes, Frank J.
In: Molecular and Cellular Endocrinology, Vol. 38, No. 2-3, 1984, p. 109-116.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Homologous somatotropin radioreceptor assay utilizing recombinant bovine growth hormone
AU - Haro, Luis S.
AU - Collier, Robert J
AU - Talamantes, Frank J.
PY - 1984
Y1 - 1984
N2 - A homologous radioreceptor assay using recombinant bovine growth hormone and bovine liver membranes is described. The total specific binding of 125I-labeled recombinant bovine growth hormone to the 100000 × g pellet was 48% in 24 h at 25 °C. Hormone binding was partially reversible, with 40% of the radiolabeled hormone being irreversibly bound. The amount of specific binding varied with assay pH, with the optimum occurring at pH 7.8. Specific binding was temperature-dependent, with greater specific binding occurring at 25°C than at 5°C or 37°C during a 24 h period. Recombinant bovine growth hormone, human growth hormone, ovine growth hormone and recombinant porcine growth hormone competed effectively with 125I-labeled recombinant bovine growth hormone for binding sites, while bovine prolactin and ovine prolactin were needed in amounts 106-fold the concentration of recombinant bovine growth hormone to displace the radiolabeled hormone. Surprisingly, human placental lactogen did not displace the radiolabeled hormone.
AB - A homologous radioreceptor assay using recombinant bovine growth hormone and bovine liver membranes is described. The total specific binding of 125I-labeled recombinant bovine growth hormone to the 100000 × g pellet was 48% in 24 h at 25 °C. Hormone binding was partially reversible, with 40% of the radiolabeled hormone being irreversibly bound. The amount of specific binding varied with assay pH, with the optimum occurring at pH 7.8. Specific binding was temperature-dependent, with greater specific binding occurring at 25°C than at 5°C or 37°C during a 24 h period. Recombinant bovine growth hormone, human growth hormone, ovine growth hormone and recombinant porcine growth hormone competed effectively with 125I-labeled recombinant bovine growth hormone for binding sites, while bovine prolactin and ovine prolactin were needed in amounts 106-fold the concentration of recombinant bovine growth hormone to displace the radiolabeled hormone. Surprisingly, human placental lactogen did not displace the radiolabeled hormone.
KW - bovine growth hormone
KW - growth hormone receptor
KW - homologous hormone-receptor system
KW - radioreceptor assay
KW - somatogenic
UR - http://www.scopus.com/inward/record.url?scp=0021716753&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0021716753&partnerID=8YFLogxK
U2 - 10.1016/0303-7207(84)90109-6
DO - 10.1016/0303-7207(84)90109-6
M3 - Article
VL - 38
SP - 109
EP - 116
JO - Molecular and Cellular Endocrinology
JF - Molecular and Cellular Endocrinology
SN - 0303-7207
IS - 2-3
ER -