Abstract:Objective To investigate the clinical significance of serum soluble T-cell immunoglobulin and mucin domain-3 (s-Tim-3), inflammatory factors and molecules related to renin-angiotensin-aldosterone system (RAAS) in patients with acute pancreatitis (AP) of different conditions.?Methods?A total of 90 patients with AP who were admitted to our hospital from January 2016 to January 2019 were enrolled. According to APACHE II score, the patients were divided into mild AP group (MAP group, n?=?59) and moderate to severe AP group (MSAP group, n?=?31). Another 50 subjects who underwent a physical examination in our hospital at the same time were selected as healthy control group. Serum s-Tim-3, interleukin-6 (IL-6), interleukin-10 (IL-10), tumor necrosis factor-α (TNF-α), panel reactive antibody (PRA), angiotensin II receptor (Ang II) and aldosterone (ALD) levels were measured in all subjects. Pearson correlation was used to analyze the correlation among serum s-Tim-3 levels, APACHE II scores, RAAS-related molecules, and inflammatory factors.?Results?The serum IL-6, TNF-α, PRA, Ang II, ALD levels in MSAP group were higher than those in MAP group (P?0.05), whereas the serum IL-10 level in MSAP group was lower than that in MAP group (P?0.05). The serum IL-6, IL-10, TNF-α, PRA, Ang II and ALD levels in the MAP group were higher than those in the healthy control group (P?0.05). The serum level of s-Tim-3 was higher in the MSAP group than that in the other groups, while that in the MAP group was greater than that in the healthy control group (P?0.05). Pearson correlation analysis showed that serum levels of IL-6, TNF-α, PRA, Ang II, ALD, s-Tim-3 were positively correlated with APACHE II scores in AP patients (r?=?0.671, 0.502, 0.521, 0.633, 0.521, 0.753; all P?0.05). Serum IL-10 level was negatively correlated with APACHE II score in AP patients (r?=?-0.567, P?0.05). Serum s-Tim-3 level in AP patients was positively correlated with IL-6, TNF-α, PRA, Ang II and ALD levels (r?=?0.642, 0.512, 0.521, 0.623, 0.535; all P?0.05), and was negatively correlated with IL-10 level (r?=?-0.532, P?0.05).?Conclusions?Serum s-Tim-3, inflammatory factors and RAAS-related molecules in AP patients are related to the disease condition, and s-Tim-3 has a correlation with inflammatory factors and RAAS-related molecules. Thus, detection of the above indicators is helpful to assess the severity of AP patients and conducive to early treatment.