Galanin in the regulation of pancreatic vascular perfusion.

Abstract:

OBJECTIVES:Acute pancreatitis is associated with compromised pancreatic microcirculation. Galanin is a vasoactive neuropeptide, but its role in the regulation of pancreatic vascular perfusion (PVP) is unclear. METHODS:Localization of galanin immunoreactivity was investigated by immunohistochemistry, and the effects of bolus doses of galanin or the antagonist galantide on blood pressure (BP) and PVP (by laser Doppler fluxmetry) were determined in anesthetized possums. RESULTS:Galanin immunoreactivity was abundant in the possum pancreas particularly around blood vessels. Galanin (0.001-10 nmol) produced a dose-dependent increase in BP (to 177% of baseline) and a complex PVP response consisting of a transient increase, then a fall below baseline with recovery to above baseline. Galantide (0.003-30 nmol) caused a dose-dependent biphasic response in BP, with a reduction, recovery, then a further fall, followed by recovery, whereas PVP increased (178%) then fell (to 56%) of baseline. Similar effects were produced by continuous intravenous infusion of galanin (1 and 10 nmol) or galantide (3 and 30 nmol). The second-phase response of these agents is probably a passive response of the pancreatic vasculature to systemic cardiovascular effects. CONCLUSIONS:These data suggest that galanin acutely reduces PVP, whereas galantide increases it, implying galanin may be important in the regulation of PVP.

journal_name

Pancreas

journal_title

Pancreas

authors

Brooke-Smith ME,Carati CJ,Bhandari M,Toouli J,Saccone GT

doi

10.1097/MPA.0b013e31815ac561

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

267-73

issue

3

eissn

0885-3177

issn

1536-4828

pii

00006676-200804000-00007

journal_volume

36

pub_type

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