Zahra Vojdani - Laboratory for Stem Cell Research, Anatomy Department, Medical school, Shiraz University of Medical Sciences, Shiraz, Iran
Jafar Bagheri - Laboratory for Stem Cell Research, Anatomy Department, Medical school, Shiraz University of Medical Sciences, Shiraz, Iran
Tahereh Talaei-Khozani - Laboratory for Stem Cell Research, Anatomy Department, Medical school, Shiraz University of Medical Sciences, Shiraz, Iran
Negar Azarpira - Transplantation Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
Mahin Salmannjad - Laboratory for Stem Cell Research, Anatomy Department, Medical school, Shiraz University of Medical Sciences, Shiraz, Iran
Ali Farokhi - Royan Institute for Stem Cell Biology and Technology, ACECR Department of Stem Cell and Developmental Biology, Cell Science Research Center, Tehran, Iran

Objective(s): Fetal microchimerism is the persistence of allogeneic cell population that transfer from the fetus to the mother. The aim of this study was to evaluate the presence of fetal microchimerism in the pancreas of the mouse with acute pancreatitis (AP).Materials and Methods: In this experimental study, female wild-type mice were mated with male EGFP+. AP model was obtained by injection of caerulein two days after delivery. Sixty mice were divided into ۳ groups:  the virgin pancreatitis-induced animals, pregnant pancreatitis-induced animals mated with transgenic EGFP mice, and pregnant sham animals. To prove pancreatitis induction, the blood amylase and lipase were assessed; and pancreas was removed from a subpopulation of each group for histopathological examinations after ۶ hr. The remaining mice were kept for ۳ weeks and histopathological exanimation, immunohistochemistry, and PCR were performed.Results: EGFP+ cells were found in acini and around the blood vessels in the pancreas of pregnant pancreatitis-induced animals. They differentiated to acinar, adipocyte-like, and mesenchymal-like cells. PCR showed that ۲۰% of the pregnant pancreatitis-induced animals were EGFP+. The histopathological study showed improvement in pancreatitis scores in the mice with history of pregnancy. Conclusion: It seems that pregnancy has a beneficial impact on caerulein-induced pancreatitis and improves the pancreatitis score in mouse.

Acute pancreatitis, Caerulein, Chimerism, Enhanced green fluorescent protein, Mice, pregnancy