Related Experiment Video
Updated: Aug 18, 2026

Surgical Injury to the Mouse Pancreas through Ligation of the Pancreatic Duct as a Model for Endocrine and Exocrine Reprogramming and Proliferation
Published on: August 7, 2015
Free radicals-induced morphological changes in the pancreas
K Janicki1, E Radzikowska, R Pietura
11st Department of Surgery and Transplantology, Medical University of Lublin.
Abstract:
Oxidative stress occurs whenever there is an imbalance between the generation of free radicals and the antioxidant defense. Oxygen is cytotoxic if oxygen concentration is higher than its amount in the atmosphere. This phenomenon is called hyperoxide process. This experiment was performed to determine the influence of normobaric hyperoxide process on peroxidation occurred in the rat's pancreas. Furthermore, the aim of this study was to estimate morphological changes in the pancreas. The studies were carried out on 44 male Wistar strain rats with the initial body weight of 230-250 g. After acclimation period the animals were divided into four experimental groups of 11 in a group. The exposure period of the influence of chemically pure oxygen was the base of the classification of rats into experimental groups labelled as follows: I, II, III. The time of exposure was 12, 24 and 48 hrs, respectively. The animals were dissected immediately after decapitation. The internal organs were investigated during autopsy. The whole pancreas with surrounding fatty tissue and peritoneum was cut out. Ultrastructural identification of different cell types required examination of several sections from each block and careful examination of numerous selected photographs. The histological preparations were evaluated in electron microscope. Histological evaluation revealed the presence of changes which seem to be adaptative and temporary. The B cells of Langerhans' islets were more damaged than other endocrine cells.
Related Concept Videos
Acute Pancreatitis I: Introduction
Acute pancreatitis is characterized by rapid inflammation of the pancreas, often caused by factors like gallstone blockage or excessive alcohol consumption. Chronic pancreatitis, on the other hand, is a slow, progressive inflammation that may result from long-term alcohol abuse, obstructions in the pancreatic duct, or genetic factors.
The causes of acute pancreatitis include:
Chronic Pancreatitis I: Introduction
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
Acute Pancreatitis I: Introduction
Acute Pancreatitis II: Pathophysiology
Chronic Pancreatitis I: Introduction
Chronic Pancreatitis II: Pathophysiology

