Abstract
The possibility of using the gamma-glutamyl-transpeptidase system for transformation of inactive propeptide, gamma-glutamyl-neuropeptides into active neuropeptides has been tested on dermorphin and its gamma-glutamyl analogue. Gamma-glutamyl-dermorphin 2 showed little affinity for opioid receptors. Nonetheless, systemic (intraperitoneal (i.p.), or intravenous (i.v.)) application of this compound induced significant antinociceptive effects, although ten to twenty-fold higher doses were required compared to the parent dermorphin 1. On the other hand, the analogue 2 showed high, antinociceptive activity when injected intrathecally (i.t.). When compared to dermorphin, 2 was one third as potent, but did show a significant prolonged duration of the effect. These results suggest that in the periphery, the peptidase metabolism which results in degradation of bioactivity, is offset by gammaglutamyl transpeptidase (GGTP) activity that liberates bioactive peptide 2. On the other hand, in the central nervous system, the activity of gamma-glutamyl transpeptidase system seems to be more effective than other peptidase systems, resulting in formation of active peptide 2 in a significant amount. These data suggests that gamma-glutamyl analogues of neuropeptides can be considered as potential prodrugs, especially for synthetic analogues which themselves are resistant to peptidase action.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 905-911 |
| Number of pages | 7 |
| Journal | Life Sciences |
| Volume | 58 |
| Issue number | 11 |
| DOIs | |
| State | Published - Feb 9 1996 |
Fingerprint
Keywords
- Antinociception
- Dermorphin
- Gamma-glutamyl-dermorphin
- Gamma-glutamyl-transpeptidase
ASJC Scopus subject areas
- Pharmacology
Cite this
Synthesis and biological properties of gamma-glutamyl-dermorphin, a prodrug. / Misicka, Aleksandra; Maszczynska, Iwona; Lipkowski, Andrzej W.; Stropova, Dagmar; Yamamura, Henry I.; Hruby, Victor J.
In: Life Sciences, Vol. 58, No. 11, 09.02.1996, p. 905-911.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis and biological properties of gamma-glutamyl-dermorphin, a prodrug
AU - Misicka, Aleksandra
AU - Maszczynska, Iwona
AU - Lipkowski, Andrzej W.
AU - Stropova, Dagmar
AU - Yamamura, Henry I.
AU - Hruby, Victor J
PY - 1996/2/9
Y1 - 1996/2/9
N2 - The possibility of using the gamma-glutamyl-transpeptidase system for transformation of inactive propeptide, gamma-glutamyl-neuropeptides into active neuropeptides has been tested on dermorphin and its gamma-glutamyl analogue. Gamma-glutamyl-dermorphin 2 showed little affinity for opioid receptors. Nonetheless, systemic (intraperitoneal (i.p.), or intravenous (i.v.)) application of this compound induced significant antinociceptive effects, although ten to twenty-fold higher doses were required compared to the parent dermorphin 1. On the other hand, the analogue 2 showed high, antinociceptive activity when injected intrathecally (i.t.). When compared to dermorphin, 2 was one third as potent, but did show a significant prolonged duration of the effect. These results suggest that in the periphery, the peptidase metabolism which results in degradation of bioactivity, is offset by gammaglutamyl transpeptidase (GGTP) activity that liberates bioactive peptide 2. On the other hand, in the central nervous system, the activity of gamma-glutamyl transpeptidase system seems to be more effective than other peptidase systems, resulting in formation of active peptide 2 in a significant amount. These data suggests that gamma-glutamyl analogues of neuropeptides can be considered as potential prodrugs, especially for synthetic analogues which themselves are resistant to peptidase action.
AB - The possibility of using the gamma-glutamyl-transpeptidase system for transformation of inactive propeptide, gamma-glutamyl-neuropeptides into active neuropeptides has been tested on dermorphin and its gamma-glutamyl analogue. Gamma-glutamyl-dermorphin 2 showed little affinity for opioid receptors. Nonetheless, systemic (intraperitoneal (i.p.), or intravenous (i.v.)) application of this compound induced significant antinociceptive effects, although ten to twenty-fold higher doses were required compared to the parent dermorphin 1. On the other hand, the analogue 2 showed high, antinociceptive activity when injected intrathecally (i.t.). When compared to dermorphin, 2 was one third as potent, but did show a significant prolonged duration of the effect. These results suggest that in the periphery, the peptidase metabolism which results in degradation of bioactivity, is offset by gammaglutamyl transpeptidase (GGTP) activity that liberates bioactive peptide 2. On the other hand, in the central nervous system, the activity of gamma-glutamyl transpeptidase system seems to be more effective than other peptidase systems, resulting in formation of active peptide 2 in a significant amount. These data suggests that gamma-glutamyl analogues of neuropeptides can be considered as potential prodrugs, especially for synthetic analogues which themselves are resistant to peptidase action.
KW - Antinociception
KW - Dermorphin
KW - Gamma-glutamyl-dermorphin
KW - Gamma-glutamyl-transpeptidase
UR - http://www.scopus.com/inward/record.url?scp=0029966611&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029966611&partnerID=8YFLogxK
U2 - 10.1016/0024-3205(96)00033-1
DO - 10.1016/0024-3205(96)00033-1
M3 - Article
VL - 58
SP - 905
EP - 911
JO - Life Sciences
JF - Life Sciences
SN - 0024-3205
IS - 11
ER -