Antibiotics bioavailability in acute experimental pancreatitis

Area of Science:

• Infectious Diseases
• Gastroenterology
• Pharmacology

Background:

• Pancreatic sepsis is a life-threatening complication of acute pancreatitis.
• Effective antibiotic treatment requires therapeutic concentrations within pancreatic tissue.
• Previous antibiotic choices lacked a clear basis for pancreatic tissue penetration.

Purpose of the Study:

• To establish a rational basis for selecting antibiotics for severe acute pancreatitis.
• To determine which antibiotics achieve therapeutic concentrations in pancreatic tissue during pancreatitis.
• To evaluate the efficacy of specific antibiotics in preventing pancreatic sepsis.

Main Methods:

• Six mongrel dogs were used, with each dog serving as its own control.
• Antibiotic doses (clindamycin, chloramphenicol, metronidazole, gentamicin, cefazolin, ampicillin) were administered intravenously based on body weight.
• Serum and pancreatic tissue antibiotic levels were measured before and after inducing bile-trypsin hemorrhagic pancreatitis.

Main Results:

• Ampicillin, gentamicin, and cefazolin achieved therapeutic blood levels but not adequate pancreatic tissue levels.
• Clindamycin, metronidazole, and chloramphenicol demonstrated significant therapeutic tissue penetrance in normal and inflamed pancreatic tissue.
• The study identified specific antibiotics with superior pancreatic tissue penetration for treating acute pancreatitis.

Conclusions:

• Antibiotics must achieve therapeutic concentrations in pancreatic tissue to be effective in treating severe acute pancreatitis.
• Clindamycin was identified as a suitable prophylactic antibiotic for acute severe pancreatitis due to its tissue penetration.
• Current recommendations favor broad-spectrum antibiotics like cefotaxime or imipenem with proven pancreatic tissue penetration.