Abstract
Prolactin is a trophic hormone which may act directly at the hepatocyte nucleus. In this study, specific prolactin binding sites were sought in purified rat liver nuclei. Saturable and specific, high affinity 125I-prolactin binding sites were demonstrated to be on or within the nucleus. Prolactin binding was competitively inhibited by rat and ovine prolactins but not by rat growth hormone. Using immunogold electron microscopy, we detected prolactin receptors throughout the nucleus, in association with heterochromatin. Furthermore, endogenous immunoreactive prolactin was demonstrated to be within hepatic nuclei. We conclude that rat liver nuclei possess prolactin binding sites which likely participate in hormone-directed growth processes.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 198-206 |
| Number of pages | 9 |
| Journal | Archives of Biochemistry and Biophysics |
| Volume | 296 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1992 |
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ASJC Scopus subject areas
- Biochemistry
- Biophysics
- Molecular Biology
Cite this
Identification of prolactin receptors in hepatic nuclei. / Buckley, Arthur R.; Montgomery, David W; Hendrix, Mary J C; Zukoski, Charles F.; Putnam, Charles W.
In: Archives of Biochemistry and Biophysics, Vol. 296, No. 1, 1992, p. 198-206.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Identification of prolactin receptors in hepatic nuclei
AU - Buckley, Arthur R.
AU - Montgomery, David W
AU - Hendrix, Mary J C
AU - Zukoski, Charles F.
AU - Putnam, Charles W.
PY - 1992
Y1 - 1992
N2 - Prolactin is a trophic hormone which may act directly at the hepatocyte nucleus. In this study, specific prolactin binding sites were sought in purified rat liver nuclei. Saturable and specific, high affinity 125I-prolactin binding sites were demonstrated to be on or within the nucleus. Prolactin binding was competitively inhibited by rat and ovine prolactins but not by rat growth hormone. Using immunogold electron microscopy, we detected prolactin receptors throughout the nucleus, in association with heterochromatin. Furthermore, endogenous immunoreactive prolactin was demonstrated to be within hepatic nuclei. We conclude that rat liver nuclei possess prolactin binding sites which likely participate in hormone-directed growth processes.
AB - Prolactin is a trophic hormone which may act directly at the hepatocyte nucleus. In this study, specific prolactin binding sites were sought in purified rat liver nuclei. Saturable and specific, high affinity 125I-prolactin binding sites were demonstrated to be on or within the nucleus. Prolactin binding was competitively inhibited by rat and ovine prolactins but not by rat growth hormone. Using immunogold electron microscopy, we detected prolactin receptors throughout the nucleus, in association with heterochromatin. Furthermore, endogenous immunoreactive prolactin was demonstrated to be within hepatic nuclei. We conclude that rat liver nuclei possess prolactin binding sites which likely participate in hormone-directed growth processes.
UR - http://www.scopus.com/inward/record.url?scp=0026631732&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0026631732&partnerID=8YFLogxK
U2 - 10.1016/0003-9861(92)90563-C
DO - 10.1016/0003-9861(92)90563-C
M3 - Article
C2 - 1605631
AN - SCOPUS:0026631732
VL - 296
SP - 198
EP - 206
JO - Archives of Biochemistry and Biophysics
JF - Archives of Biochemistry and Biophysics
SN - 0003-9861
IS - 1
ER -