Abstract:Objective To explore the correlation between serum levels of interleukin-17A (IL-17A), 25-hydroxyvitamin D [25-(OH)D] and mannose binding letin (MBL) in association with neurological deficit and short-term prognosis after acute ischemic stroke (AIS).Methods A total of 200 AIS patients treated in the Department of Neurology, Tangshan People's Hospital from January 2022 to December 2023 were selected as the observation group, and 60 healthy volunteers were selected as the control group. According to the National Institutes of Health Stroke Scale (NIHSS) score at admission, the patients were divided into mild neurological deficit group (70 cases), moderate neurological deficit group (80 cases) and severe neurological deficit group (50 cases); according to the modified Rankin Scale (mRS) score 3 months after stroke, the patients were divided into good prognosis group (120 cases) and poor prognosis group (80 cases). Fasting serum samples were collected from patients upon admission, and the concentrations of IL-17A, 25-(OH)D, and MBL in the serum were measured by enzyme-linked immunosorbent assay (ELISA). Univariate and multivariate statistical analysis methods were used to evaluate the correlation between these biomarkers and the degree of neurological function injury and short-term prognosis.Results Compared with the control group, the levels of IL-17A and MBL in the observation group were higher (P < 0.05), and the level of 25-(OH)D in the observation group was lower (P < 0.05). The serum level of 25-(OH)D in the severe group was lower than that in the mild and moderate groups (P < 0.05), and the serum levels of IL-17A and MBL were higher than those in the mild and moderate groups (P < 0.05). There were no significant differences in serum levels of 25-(OH)D, IL-17A and MBL between the mild group and the moderate group (P > 0.05). There were significant differences in NIHSS score, history of recurrent stroke, proximal vascular stenosis/occlusion, diabetes mellitus, hyperlipidemia, hypertension, serum IL-17A, 25-(OH)D and MBL between the poor prognosis group and the good prognosis group (P < 0.05), while there were no significant differences in gender composition, age, BMI and posterior circulation involvement between the poor prognosis group and the good prognosis group (P > 0.05). Multivariate binary Logistic regression analysis showed that high NIHSS score [O^R = 4.776 (95% CI: 2.127, 7.214) ], history of recurrent stroke [O^R = 7.420 (95% CI: 1.852, 12.478) ], proximal vascular stenosis/occlusion [O^R = 3.425 (95% CI: 2.165, 5.418) ], diabetes mellitus [O^R = 1.274 (95% CI: 1.023, 1.586) ], hyperlipidemia [O^R = 1.408 (95% CI: 1.062, 1.876) ], hypertension [O^R = 3.475 (95% CI: 1.763, 5.847) ], decreased 25-(OH)D level [O^R = 3.582 (95% CI: 1.425, 6.987) ], increased MBL level [O^R = 6.319 (95% CI: 2.010, 8.764) ] and increased IL-17A level [O^R = 2.452 (95% CI: 1.785, 4.361) ] were all risk factors for poor short-term prognosis in AIS patients (P < 0.05). The area under the curve (AUC) of serum 25-(OH)D, MBL and IL-17A for prognosis evaluation of AIS patients were 0.733 (95% CI: 0.617, 0.849), 0.828 (95% CI: 0.737, 0.920) and 0.782 (95% CI: 0.678, 0.886), respectively; the sensitivities were 62.52% (95% CI: 0.518, 0.714), 82.71% (95% CI: 0.736, 0.893) and 63.48% (95% CI: 0.530, 0.728), respectively; the specificities were 75.22% (95% CI: 0.663, 0.827), 72.82% (95% CI: 0.635, 0.807) and 82.83% (95% CI: 0.747, 0.889), respectively. The AUC of the combined diagnosis of the three was 0.884 (95% CI: 0.810, 0.959), with a sensitivity of 78.84% (95% CI: 0.692, 0.862) and a specificity of 73.81% (95% CI: 0.650, 0.813).Conclusion The serum levels of IL-17A, 25-(OH)D and MBL are closely correlated with the degree of neurological deficit and short-term prognosis in patients with acute ischemic stroke. They are expected to be potential biomarkers for predicting the condition and prognosis of acute ischemic stroke, providing a new reference basis for clinical intervention and prognosis evaluation.