Abstract
The binding of [3H][D-Ala2, MePhe4, Gly-ol5]enkephaline (DAGO), [3H][D-Pen2,5]enkephalin (DPDPE), [3H]ethylketocyclazocine (EKC), and [3H][Met5]enkephalin (MET) was used to examine η-,δ-,κ-, and η-receptors, respectively, in the developing (birth to postnatal day 19) and adult human cerebellum. Specific and saturable binding of all ligands was recorded in developing brains, and of [3H]DAGO, [3H]DPDPE, and [3H]EKC in adult cerebellum; all data fit a single homogeneous binding site for each ligand. However, the ontogenic profile of opioid receptor subtypes differed. δ- and κ-receptor capacities were 7.8- and 3.6-fold, respectively, greater in infant cerebellum than in adults. The η-receptor decreased over 7-fold in both binding affinity and capacity after day 2; by adulthood, the binding affinity was the same as in newborns but only one-half the binding capacity was recorded. The concentration of ζ-receptors was 20-fold greater in subjects 2-19 days of age than in newborns. These data demonstrate the presence, and distinct developmental profiles, opioid receptors in human cerebellum. Although the function of η-,ζ-, and κ-receptors in human cerebellum are unclear, the growth-related ζ-receptor is present at a time of cell replication and differentiation but is not detected in mature cerebellum.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 62-68 |
| Number of pages | 7 |
| Journal | Brain research |
| Volume | 523 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 16 1990 |
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All Science Journal Classification (ASJC) codes
- Neuroscience(all)
- Molecular Biology
- Clinical Neurology
- Developmental Biology
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Adult and developing human cerebella exhibit different profiles of opioid binding sites. / Zagon, Ian S.; Gibo, Denise M.; McLaughlin, Patricia J.
In: Brain research, Vol. 523, No. 1, 16.07.1990, p. 62-68.Research output: Contribution to journal › Article
TY - JOUR
T1 - Adult and developing human cerebella exhibit different profiles of opioid binding sites
AU - Zagon, Ian S.
AU - Gibo, Denise M.
AU - McLaughlin, Patricia J.
PY - 1990/7/16
Y1 - 1990/7/16
N2 - The binding of [3H][D-Ala2, MePhe4, Gly-ol5]enkephaline (DAGO), [3H][D-Pen2,5]enkephalin (DPDPE), [3H]ethylketocyclazocine (EKC), and [3H][Met5]enkephalin (MET) was used to examine η-,δ-,κ-, and η-receptors, respectively, in the developing (birth to postnatal day 19) and adult human cerebellum. Specific and saturable binding of all ligands was recorded in developing brains, and of [3H]DAGO, [3H]DPDPE, and [3H]EKC in adult cerebellum; all data fit a single homogeneous binding site for each ligand. However, the ontogenic profile of opioid receptor subtypes differed. δ- and κ-receptor capacities were 7.8- and 3.6-fold, respectively, greater in infant cerebellum than in adults. The η-receptor decreased over 7-fold in both binding affinity and capacity after day 2; by adulthood, the binding affinity was the same as in newborns but only one-half the binding capacity was recorded. The concentration of ζ-receptors was 20-fold greater in subjects 2-19 days of age than in newborns. These data demonstrate the presence, and distinct developmental profiles, opioid receptors in human cerebellum. Although the function of η-,ζ-, and κ-receptors in human cerebellum are unclear, the growth-related ζ-receptor is present at a time of cell replication and differentiation but is not detected in mature cerebellum.
AB - The binding of [3H][D-Ala2, MePhe4, Gly-ol5]enkephaline (DAGO), [3H][D-Pen2,5]enkephalin (DPDPE), [3H]ethylketocyclazocine (EKC), and [3H][Met5]enkephalin (MET) was used to examine η-,δ-,κ-, and η-receptors, respectively, in the developing (birth to postnatal day 19) and adult human cerebellum. Specific and saturable binding of all ligands was recorded in developing brains, and of [3H]DAGO, [3H]DPDPE, and [3H]EKC in adult cerebellum; all data fit a single homogeneous binding site for each ligand. However, the ontogenic profile of opioid receptor subtypes differed. δ- and κ-receptor capacities were 7.8- and 3.6-fold, respectively, greater in infant cerebellum than in adults. The η-receptor decreased over 7-fold in both binding affinity and capacity after day 2; by adulthood, the binding affinity was the same as in newborns but only one-half the binding capacity was recorded. The concentration of ζ-receptors was 20-fold greater in subjects 2-19 days of age than in newborns. These data demonstrate the presence, and distinct developmental profiles, opioid receptors in human cerebellum. Although the function of η-,ζ-, and κ-receptors in human cerebellum are unclear, the growth-related ζ-receptor is present at a time of cell replication and differentiation but is not detected in mature cerebellum.
UR - http://www.scopus.com/inward/record.url?scp=0025352468&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025352468&partnerID=8YFLogxK
U2 - 10.1016/0006-8993(90)91635-T
DO - 10.1016/0006-8993(90)91635-T
M3 - Article
C2 - 2169964
AN - SCOPUS:0025352468
VL - 523
SP - 62
EP - 68
JO - Brain Research
JF - Brain Research
SN - 0006-8993
IS - 1
ER -