Influence of Intestinal Lymphatic Ligation on Pulmonary Injury in Rats with Severe Acute Pancreatitis
Yuan-qi Liu , Lu-lu Wang , Li Chen , Yu-xia Xiong
Current Medical Science ›› 2022, Vol. 42 ›› Issue (4) : 711 -719.
The present study explored the mechanisms involved in intestinal lymphatic ligation in rats with severe acute pancreatitis (SAP).
Male Sprague Dawley rats were randomly divided into 4 groups: saline group, saline+ligation group, SAP group, and SAP+ligation group. Rats in the SAP group were administered sodium taurocholate solution. Isolated mesenteric lymph duct ligation was administered to the saline+ligation and SAP+ligation groups. Endotoxin (ET), nitric oxide (NO), tumor necrosis factor-α (TNF-α), interleukin-1 (IL-1), myeloperoxidase (MPO), and superoxide dismutase (SOD) were detected. Nuclear factor-κB (NF-κB) and intercellular cell adhesion molecule-1 (ICAM-1) proteins were observed. The mRNA of inducible nitric oxide synthase(iNOS) and Toll-like receptor 4 (TLR4) was detected by PCR.
Pathomorphological analysis showed that necrosis was present in the lung of rats in the SAP group, but only mild lesions in the SAP+ligation group. ET, NO, TNF-α, and IL-1 in the serum and lung tissue were significantly decreased and MPO was increased in the SAP+ligation group as compared with the SAP group. However, MPO was increased. The expression of NF-κB and ICAM-1, either iNOS or TLR4, was upregulated in the SAP group, but downregulated in the SAP+ligation group. Intestinal lymph duct ligation prevented ET translocation, the release of inflammation factors, and inflammation injury.
The intestinal lymph duct ligation could alleviate SAP-induced pulmonary injury by suppressing NF-κB activation in rats.
intestinal lymphatic ligation / severe acute pancreatitis / lung injury / intestinal bacterial translocation
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