[The influence of apoptosis of lymphocytes of Peyer's patches on the pathogenesis of gut barrier damage in severely scalded mice].
OBJECTIVE
To investigate the changes in cellular apoptosis of Peyer's patches in severely scalded mice, and to explore its role in the pathogenesis of gut barrier damage.


METHODS
Forty BALB/c mice were randomly divided into normal control, 12 post-scald hour (12PSH), 24PSH and 72PSH groups, with 10 in each group. The mice in all PSH groups were inflicted with 20% TBSA full-thickness scald on the back. The mice in all the groups were sacrificed at different time points, and Peyer's patches were harvested from all the mice for HE staining, DNA gel electrophoresis, and flow cytometry ( FCM) examination with FITC conjugated Annexin-v and propidium iodide( PI) staining of cells.


RESULTS
HE staining revealed that there were relatively abundant apoptotic cells scattering in Peyer's patches of scalded mice . DNA electrophoresis of Peyer's patches revealed typical " ladder" pattern at all indicated time points in scalded mice. Apoptotic percentage of detached Peyer's patches cells in control and scalded group were (4. 9+/-2. 1)% , (26.7+/-3. 1)% , (21.6 +/-4.0)% ,(12. 8 +/-2.0)% , respectively, and the percentage reached the peak at 12 PSH.


CONCLUSIONS
Apoptosis is a principle modality of cell death of small intestinal Peyer's patches lymphocytes in severely scalded mice, and it might contribute to immunity barrier failure of intestinal wall after severe thermal injury.
Fan
Jun
J
Burn Institute, The First Affiliated Hospital of Nanchang University, Nanchang 330006 , PR China.
Xie
Yong
Y
Zhou
Nan-jin
NJ
Chen
Jiang
J
Deng
Zhi-yun
ZY
D000818:Animals; D017209:Apoptosis; D002056:Burns / Q000276:immunology* / Q000378:metabolism; D007421:Intestine, Small / Q000166:cytology / Q000276:immunology; D008214:Lymphocytes / Q000166:cytology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D010581:Peyer's Patches / Q000166:cytology*