Probiotics enhance pancreatic glutathione biosynthesis and reduce oxidative stress in experimental acute pancreatitis.
Factors determining severity of acute pancreatitis (AP) are poorly understood. Oxidative stress causes acinar cell injury and contributes to the severity, whereas prophylactic probiotics ameliorate experimental pancreatitis. Our objective was to study how probiotics affect oxidative stress, inflammation, and acinar cell injury during the early phase of AP. Fifty-three male Sprague-Dawley rats were randomly allocated into groups: 1) control, 2) sham procedure, 3) AP with no treatment, 4) AP with probiotics, and 5) AP with placebo. AP was induced under general anesthesia by intraductal glycodeoxycholate infusion (15 mM) and intravenous cerulein (5 microg.kg(-1).h(-1), for 6 h). Daily probiotics or placebo were administered intragastrically, starting 5 days prior to AP. After cerulein infusion, pancreas samples were collected for analysis including lipid peroxidation, glutathione, glutamate-cysteine-ligase activity, histological grading of pancreatic injury, and NF-kappaB activation. The severity of pancreatic injury correlated to oxidative damage (r = 0.9) and was ameliorated by probiotics (1.5 vs. placebo 5.5; P = 0.014). AP-induced NF-kappaB activation was reduced by probiotics (0.20 vs. placebo 0.53 OD(450nm)/mg nuclear protein; P < 0.001). Probiotics attenuated AP-induced lipid peroxidation (0.25 vs. placebo 0.51 pmol malondialdehyde/mg protein; P < 0.001). Not only was AP-induced glutathione depletion prevented (8.81 vs. placebo 4.1 micromol/mg protein, P < 0.001), probiotic pretreatment even increased glutathione compared with sham rats (8.81 vs. sham 6.18 miccromol/mg protein, P < 0.001). Biosynthesis of glutathione (glutamate-cysteine-ligase activity) was enhanced in probiotic-pretreated animals. Probiotics enhanced the biosynthesis of glutathione, which may have reduced activation of inflammation and acinar cell injury and ameliorated experimental AP, via a reduction in oxidative stress.
Lutgendorff
Femke
F
Dept. of Clinical and Experimental Medicine, Division of Surgery, Univ. Hospital, 581 85 Linköping, Sweden.
Trulsson
Lena M
LM
van Minnen
L Paul
LP
Rijkers
Ger T
GT
Timmerman
Harro M
HM
Franzén
Lennart E
LE
Gooszen
Hein G
HG
Akkermans
Louis M A
LM
Söderholm
Johan D
JD
Sandström
Per A
PA
D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D002108:Ceruletide; D005978:Glutathione / Q000096:biosynthesis*; D006002:Glycodeoxycholic Acid; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects*; D010195:Pancreatitis / Q000139:chemically induced / Q000188:drug therapy* / Q000378:metabolism*; D019936:Probiotics / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013047:Specific Pathogen-Free Organisms
D006002:Glycodeoxycholic Acid; D002108:Ceruletide; D005978:Glutathione