Abstract
Cultured astrocytes have been previously found to express several neuropeptides, as well as the neuropeptide processing enzyme carboxypeptidase E (CPE). To investigate whether cultured astrocytes contain additional peptide-processing enzymes, Northern blots were screened for peptidylglycine-α-amidating monooxygenase (PAM) mRNA. PAM is involved with the formation of amide groups on the C-terminus of numerous peptide hormones and neurotransmitters. Primary cultures of astrocytes contain moderate levels of PAM mRNA, as determined by Northern blot analysis. The level of PAM mRNA is cultured hypothalamic astrocytes is similar to the level expressed in cultured hypothalamic neurons. The relative abundance of PAM mRNA differs up to 6-fold between astrocytes cultured from various brain regions. Astrocytes cultured from hypothalamus have high levels of PAM mRNA, those cultured from striatum, frontal cortex, and hippocampus have moderate levels, and those cultured from cerebellum have low levels. To investigate whether all cultured astrocytes express PAM mRNA, in situ hybridization analysis of cultured astrocytes was performed. Interestingly, virtually all of the astrocytes cultured from either hypothalamus or cerebellum express PAM mRNA, in contrast to a previous finding that only 20-40% of similarly cultured astrocytes express CPE. The presence of PAM mRNA in cultured astrocytes suggests that these cells have the capacity to produce amidated neuropeptides.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 202-208 |
| Number of pages | 7 |
| Journal | Brain Research |
| Volume | 596 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Nov 20 1992 |
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Keywords
- Neuroglia
- Neuropeptide biosynthesis
- Prohormone processing
ASJC Scopus subject areas
- Developmental Biology
- Molecular Biology
- Clinical Neurology
- Neuroscience(all)
Cite this
Cultured astrocytes express mRNA for peptidylglycine-α-amidating monooxygenase, a neuropeptide processing enzyme. / Klein, Robyn S.; Fricker, Lloyd D.
In: Brain Research, Vol. 596, No. 1-2, 20.11.1992, p. 202-208.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cultured astrocytes express mRNA for peptidylglycine-α-amidating monooxygenase, a neuropeptide processing enzyme
AU - Klein, Robyn S.
AU - Fricker, Lloyd D.
PY - 1992/11/20
Y1 - 1992/11/20
N2 - Cultured astrocytes have been previously found to express several neuropeptides, as well as the neuropeptide processing enzyme carboxypeptidase E (CPE). To investigate whether cultured astrocytes contain additional peptide-processing enzymes, Northern blots were screened for peptidylglycine-α-amidating monooxygenase (PAM) mRNA. PAM is involved with the formation of amide groups on the C-terminus of numerous peptide hormones and neurotransmitters. Primary cultures of astrocytes contain moderate levels of PAM mRNA, as determined by Northern blot analysis. The level of PAM mRNA is cultured hypothalamic astrocytes is similar to the level expressed in cultured hypothalamic neurons. The relative abundance of PAM mRNA differs up to 6-fold between astrocytes cultured from various brain regions. Astrocytes cultured from hypothalamus have high levels of PAM mRNA, those cultured from striatum, frontal cortex, and hippocampus have moderate levels, and those cultured from cerebellum have low levels. To investigate whether all cultured astrocytes express PAM mRNA, in situ hybridization analysis of cultured astrocytes was performed. Interestingly, virtually all of the astrocytes cultured from either hypothalamus or cerebellum express PAM mRNA, in contrast to a previous finding that only 20-40% of similarly cultured astrocytes express CPE. The presence of PAM mRNA in cultured astrocytes suggests that these cells have the capacity to produce amidated neuropeptides.
AB - Cultured astrocytes have been previously found to express several neuropeptides, as well as the neuropeptide processing enzyme carboxypeptidase E (CPE). To investigate whether cultured astrocytes contain additional peptide-processing enzymes, Northern blots were screened for peptidylglycine-α-amidating monooxygenase (PAM) mRNA. PAM is involved with the formation of amide groups on the C-terminus of numerous peptide hormones and neurotransmitters. Primary cultures of astrocytes contain moderate levels of PAM mRNA, as determined by Northern blot analysis. The level of PAM mRNA is cultured hypothalamic astrocytes is similar to the level expressed in cultured hypothalamic neurons. The relative abundance of PAM mRNA differs up to 6-fold between astrocytes cultured from various brain regions. Astrocytes cultured from hypothalamus have high levels of PAM mRNA, those cultured from striatum, frontal cortex, and hippocampus have moderate levels, and those cultured from cerebellum have low levels. To investigate whether all cultured astrocytes express PAM mRNA, in situ hybridization analysis of cultured astrocytes was performed. Interestingly, virtually all of the astrocytes cultured from either hypothalamus or cerebellum express PAM mRNA, in contrast to a previous finding that only 20-40% of similarly cultured astrocytes express CPE. The presence of PAM mRNA in cultured astrocytes suggests that these cells have the capacity to produce amidated neuropeptides.
KW - Neuroglia
KW - Neuropeptide biosynthesis
KW - Prohormone processing
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UR - http://www.scopus.com/inward/citedby.url?scp=0026474840&partnerID=8YFLogxK
U2 - 10.1016/0006-8993(92)91548-S
DO - 10.1016/0006-8993(92)91548-S
M3 - Article
C2 - 1467983
AN - SCOPUS:0026474840
VL - 596
SP - 202
EP - 208
JO - Brain Research
JF - Brain Research
SN - 0006-8993
IS - 1-2
ER -