Abstract
Neuropeptide Y and nitric oxide (NO) synthase are colocalized in nervous tissues. We tested the hypothesis whether or not NO might be involved in the release of neuropeptide Y. Neuropeptide Y concentration in the supernatant of PC12 rat pheochromocytoma cells, shown to express NO synthase I by immunohistochemistry, rose threefold in a time- and dose-dependent manner following sodiumnitroprusside and 3-morpholinosydnonimine (SIN-1) incubation. Neuropeptide Y mRNA expression was induced by NO-donors as a function of incubation-time. Neuropeptide Y production rose fivefold with zaprinast, an inhibitor of the phosphodiesterase V and threefold with nerve growth factor (NGF). Combined application of zaprinast and NGF did not further increase neuropeptide Y production while combination of zaprinast and sodiumnitroprusside potentiated the NO effect on neuropeptide Y release. The data suggest that NO regulates neuropeptide Y secretion of PC12 pheochromocytoma cells on the mRNA level.
| Original language | English |
|---|---|
| Pages (from-to) | 313-317 |
| Number of pages | 5 |
| Journal | European Journal of Pharmacology |
| Volume | 331 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - 23 Jul 1997 |
| Externally published | Yes |
Keywords
- Neuropeptide Y
- Nitric oxide (NO) pharmacology
- PC12 cells