4.7 Article

Tuftsin ameliorates splenic inflammatory injury by promoting neuropilin-1 in severe acute pancreatitis

Journal

BIOCHEMICAL PHARMACOLOGY
Volume 199, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bcp.2022.115030

Keywords

Severe acute pancreatitis; Spleen injury; Tuftsin; NRP1; Macrophage; Inflammation

Funding

  1. National Natural Science Foundation of China [81973580, 81803866]
  2. 1.3.5 project for disciplines of excellence, West China Hospital, Sichuan University [ZYXY21002]
  3. Innovative Chinese Medicine and the Health Products Research Academician Workstation of the Academician Boli Zhang and the Academician Beiwei Zhu, West China Hospital, Sichuan University, Sichuan [HXYS19001, HXYS19002]
  4. COVID-19 Science and the Technology Emergency Project of Sichuan Province of China [2021YFS0408]
  5. Key Technology Research and Development Program of Sichuan Province of China [2022YFS0425, 2022YFS0426]
  6. West China Hospital, Sichuan University [161200012]

Ask authors/readers for more resources

This study found that Tuftsin alleviates SAP-induced spleen injury by promoting NRP1 expression, mainly through alleviating mitochondrial dysfunction, oxidative stress, ATP depletion, and the expression of pro-inflammatory factors.
Severe acute pancreatitis (SAP)-associated spleen injury causing immune disturbances aggravates organs injuries, which contributes to higher mortality rate. However, there are no effective drugs to cure SAP-induced spleen injury. Here, we found that Tuftsin (TN) is effective for ameliorating SAP-induced pathological damage and inflammation of spleen, mainly via alleviating mitochondrial dysfunction, oxidative stress, ATP depletion and the expression of pro-inflammatory factors. We further found that TN promoted anti-inflammatory macrophage phenotype M2 via up-regulating NRP1 on macrophage in spleen during SAP. Meanwhile, EG00229 (an inhibitor of NRP1 bound to TN) weakened TN's therapeutic effect in SAP-associated spleen injury. And EG00229 also inhibited M2 macrophage, leading to increasing inflammasome formation. Additionally, EG00229 reduced the protective efficiency of TN on mitochondrial dysfunction, and inflammation injury via NRP1 in spleen caused by SAP. Similarly, siRNA-Nrp1 into macrophage also prevented TN's inhibition on apoptosis. These findings reveal that TN alleviates SAP-induced spleen injury by promoting NRP1.

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