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Acetazolamide induces indomethacin and ischaemia-sensitive pial arteriolar vasodilation in the piglet

  • Metaadatok
Tartalom: http://real.mtak.hu/6016/
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Article
Cím:
Acetazolamide induces indomethacin and ischaemia-sensitive pial arteriolar vasodilation in the piglet
Létrehozó:
Domoki, Ferenc
Zimmermann, Aliz
Tóth-Szűki, Valéria
Bari, Ferenc
Kiadó:
Wiley-Blackwell
Dátum:
2008
Téma:
RJ Pediatrics / gyermekgyógyászat
Tartalmi leírás:
Aim: Acetazolamide (AZD) produces cerebral vasodilation. The underlying mechanism is unclear, but it is assumed to be largely due to CO2 retention and acidosis. We tested if cerebrovascular effects of AZD were similar to hypercapnia in the newborn pig.
Methods: We used the closed cranial window/intravital microscopy technique to determine pial arteriolar diameters simultaneously with laser-Doppler flowmetry (LDF) to monitor cortical blood perfusion. Anaesthetized (Na-thiopenthal + alpha-chloralose), ventilated, 1-day-old instrumented piglets (n = 38) were divided into five experimental groups: time control (n = 11), indomethacin, ibuprofen, N-omega-nitro-L-arginine methyl ester (L-NAME) treatments (1, 30, 15 mg/kg, i.v., n = 6, 6, 4, respectively), and global ischaemia/reperfusion (I/R, 10 min induced by elevated intracranial pressure, n = 11). Responses to 5-10% inhaled CO2 were recorded before and after the treatments, and then in a similar manner to AZD (10-20 mg/kg, i.v.).
Results: Hypercapnia and AZD produced pial arteriolar vasodilation and increases in cortical perfusion. Consistent with previous data, hypercapnia-induced changes were abolished by indomethacin, unaltered by ibuprofen and L-NAME and were significantly attenuated after I/R. AZD-induced vasodilation was also sensitive to indomethacin and I/R and was unaltered by ibuprofen or L-NAME.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Domoki, Ferenc and Zimmermann, Aliz and Tóth-Szűki, Valéria and Bari, Ferenc (2008) Acetazolamide induces indomethacin and ischaemia-sensitive pial arteriolar vasodilation in the piglet. ACTA PAEDIATRICA, 97 (3). pp. 280-284. ISSN 0803-5253
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