Poly(ADP-ribose) polymerase inhibition modulates experimental acute necrotizing pancreatitis-induced oxidative stress, bacterial translocation and neopterin concentrations in rats.

Abstract

Various studies have been performed to find out novel treatment strategies for acute necrotizing pancreatitis (ANP). Inhibition of poly(ADP-ribose) polymerase (PARP) is shown to reduce inflammation in several pathological conditions. We aimed to evaluate the efficacy of benzamide, a PARP inhibitor, in an experimental model of ANP. Thirty Sprague-Dawley rats were divided into three groups: sham-operated, ANP and ANP + benzamide groups. All groups except the sham-operated group were subjected to the ANP procedure, induced by infusing of 1 mL/kg of 3% sodium taurocholate into the common biliopancreatic duct. The ANP + benzamide group received 100 mg/kg/day benzamide intraperitoneally for a total of three days after induction of pancreatitis. The surviving animals were killed at the fourth day and the pancreas was harvested for biochemical, microbiological and histological analysis. Blood samples were also obtained from the animals. In the ANP group, a significant increase was observed in concentrations of serum amylase and neopterin and tissue oxidative stress indices (malondialdehyde, superoxide dismutase and glutathione peroxidase). Almost all of these changes were found to be reversed to near their normal values in the ANP + benzamide group. Histological injury scores were significantly higher in the ANP group than in the sham group (P < 0.05, ANP versus sham), and were significantly lower in the ANP + benzamide group than in the ANP group (P < 0.05, ANP + benzamide versus ANP). Evaluation of bacterial translocation identified significantly fewer infected sites in the ANP + benzamide group than in the ANP animals (P < 0.01). We observed that inhibition of PARP with benzamide reduced the severity, the mortality, the bacterial translocation rates and the neopterin concentrations in an experimental ANP model in rats. These findings suggest that it may be possible to improve the outcome of ANP by using PARP inhibitors.

• Authors: Mehmet Yasar, Bulent Uysal, Umit Kaldirim, Yesim Oztas, Serdar Sadir, Mehmet Ozler, Turgut Topal, Omer Coskun, Abdullah Kilic, Tuncer Cayci, Yavuz Poyrazoglu, Sukru Oter, Ahmet Korkmaz, Ahmet Guven
• Journal: Experimental biology and medicine (Maywood, N.J.) (Exp Biol Med (Maywood)) Vol. 235 Issue 9 Pg. 1126-33 (Sep 2010) ISSN: 1535-3699 [Electronic] England
• PMID: 20705631 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Benzamides
• Enzyme Inhibitors
• Adenosine Diphosphate Ribose
• Poly Adenosine Diphosphate Ribose
• Malondialdehyde
• Taurocholic Acid
• Neopterin
• benzamide
• Superoxide Dismutase
• Poly(ADP-ribose) Polymerases
• Amylases

Topics

• Adenosine Diphosphate Ribose (metabolism)
• Amylases (adverse effects, blood, metabolism)
• Animals
• Bacterial Translocation (drug effects)
• Benzamides
• Enzyme Inhibitors (adverse effects, metabolism, pharmacology)
• Male
• Malondialdehyde (adverse effects, metabolism)
• Neopterin (metabolism)
• Oxidative Stress (drug effects)
• Pancreas (metabolism, pathology)
• Pancreatitis (metabolism)
• Pancreatitis, Acute Necrotizing (chemically induced, microbiology, pathology)
• Poly Adenosine Diphosphate Ribose (adverse effects, metabolism)
• Poly(ADP-ribose) Polymerases (metabolism)
• Rats
• Rats, Sprague-Dawley
• Superoxide Dismutase (adverse effects, metabolism)
• Taurocholic Acid (adverse effects, metabolism)