Pancreatic capillary blood flow during caerulein-induced pancreatitis evaluated by a laser-doppler flowmeter in rats

Purpose: The pancreatic capillary blood flow (PCBF) was studied to determine its alterations during caerulein-induced pancreatitis in rats. Methods: Twenty rats were divided in groups: control and caerulein. A laser-Doppler flowmeter to measure PCBF continuously was used. Blood pressure (BP) and heart rate (HR) were monitored. Serum biochemistry analyses were determined. Histopathological study was performed. Results: The PCBF measured a mean of 109.08 ± 14.54 percent and 68.24 ± 10.47 percent in control group and caerulein group, respectively. Caerulein group had a mean decrease of 31.75 ± 16.79 percent. The serum amylase was 1323.70 ± 239.l0U.I-1 and 2184.60 ± 700.46U.I-1 in control and caerulein groups, respectively. There was a significant difference in the PCBF (p<0.05) and serum amylase (p<0.05) when compared to control and caerulein groups. Although micro and microvacuolization were seen in 30 percent in caerulein group, no significant difference was seen between the groups. Conclusion: A decrease in the PCBF may be one of the leading events and it is present before histopathological tissue injury had been established in this model of acute pancreatitis.

Reactive oxygen species inactivation improves pancreatic capillary blood flow in caerulein-induced pancreatitis in rats

Purpose: Reactive oxygen species (ROS) inactivation was studied to determine alterations in the pancreatic capillary blood flow (PCBF) during caerulein-induced pancreatitis in rats. Methods: A laser-Doppler flowmeter to measure PCBF and N-t-Butyl-Phenylnitrone (PBN) compound to inactivate ROS were used. Forty rats were divided in groups: 1) control; 2) caerulein; 3) PBN; 4) caerulein+PBN. Serem biochemistry and histopathological analyses were performed. Results: PCBF measured a mean of 109.08 ± 14.54 percent, 68.24 t 10.47 percent, 102.18 ± 10.23 percent and 87.73 ± 18.72 percent in groups 1, 2, 3 and 4, respectively. PCBF in groups 2 and 4 decreased 31.75 ± 16.79 percent and 12.26 ± 15.24 percent, respectively. Serum amylase was 1323.70 ± 239.10 U/l, 2184.60 ± 700.46 U/1, 1379.80 t 265.72 U/1 and 1622.10 ± 314.60 U/1 in groups 1, 2, 3 and 4, respectively. There was a significant difference in the PCBF and serem amylase when compared groups 2 and 4. Cytoplasmatic vacuolation was present in groups 2 and 4. Otherwise, no qualitative changes were seen. Conclusion: ROS inactivation improves PCBF and minimizes the serem amylase increase during caerulein-induced pancreatitis. ROS effect may be one of the leading causative events in this model of acute pancreatitis.