Effect of ischemia-reperfusion injury on elafin levels in rat liver.

BACKGROUND: The aim of this study was to quantify serum levels of elafin, a serine protease inhibitor, and to assess its effects on histopathological and biochemical parameters in hepatic ischemia-reperfusion injury. METHODS: Forty female Wistar albino rats were divided into five groups: Group 1 served as the control group. Liver ischemia was induced for 30 minutes in the other four groups. An additional 1-hour, 2-hour, and 3-hour reperfusion was induced in Groups 3, 4, and 5, respectively. At the end of the experiment, intracardiac blood samples were obtained for biochemical examination, and tissue samples from the liver were taken for histopathological examination. Levels of elafin, ischemia-modified albumin (IMA), total antioxi-dant status (TAS), and total oxidant status (TOS) were also examined. RESULTS: Serum elafin levels decreased beginning from Group 2, with the lowest level reached in Group 5 (p<0.01). The IMA level was the lowest in the control group and the highest in Group 5 (p<0.01). TOS, aspartate aminotransferase (AST), and alanine amino-transferase (ALT) levels were lowest in the control group and highest in Group 5 (p<0.01). Group 5 had the highest IMA/albumin ratio, although no significant differences were found between these four groups. The lowest TAS level was found in the control group, but a stable and significant increase was not detected in the other groups. No significant differences were found between the groups in terms of alkaline phosphatase (ALP) and albumin levels. A negative correlation was observed between serum elafin levels and AST, ALT, and TOS levels (p<0.01). The number of Grade 1 histopathological results was found to be higher in the groups with reperfusion (Groups 3, 4, 5). In histopathological subgroup analysis, while the elafin level was lower in Grade 1 group, AST, ALT, and TOS levels were higher (p<0.01). Additionally, the IMA/albumin ratio was found to be higher in the Grade 1 group (p=0.02). CONCLUSION: In hepatic ischemia-reperfusion injury, elafin levels decreased as the reperfusion time increased. As the reperfusion time increased, both hepatocyte damage and oxidant capacity increased, with a negative correlation observed between these findings and elafin levels. Therefore, elafin may play a protective role in hepatic ischemia-reperfusion injury and could assist clinicians in assessing liver injury.

The role of C-reactive protein albumin ratio for predicting mortality in patients with Fournier's gangrene.

BACKGROUND: Fournier's gangrene (FG) is a rapidly progressing and life-threatening necrotizing fasciitis of the genital and perineal regions. To estimate the mortality rate associated with FG, Laor et al. developed the FG severity index (FGSI), an index with proven prognostic significance. On the other hand, the C-reactive protein (CRP)/albumin (CAR) ratio is a proven objective marker of inflam-matory response. In light of the foregoing, the objective of this study is to assess the prognostic value of the CAR ratio in predicting mortality in patients with FG in comparison with FGSI. METHODS: This retrospective study consisted of 58 patients who were operated on for FG between 2019 and 2022. Research data were obtained from electronic and paper patient files, surgery notes, clinical follow-up forms, anamnesis, intensive care forms, and laboratory test results obtained from the hospital automation system. The clinical course of each patient was reviewed based on these records. The relationships between patients' CAR ratios and their demographic and clinical characteristics, including age, gender, and comorbidities, whether ostomy was performed, length of hospital stay, growth in wound culture, isolated bacterial species, FGSI scores, and laboratory test results (hemoglobin, sodium, potassium, bicarbonate, glucose, blood urea nitrogen (BUN), creatinine, albumin, and CRP levels, white blood cell counts, hematocrit values, glucose-to-potassium, neutrophil-to-lymphocyte, platelet-to-lymphocyte, and lymphocyte-to-CRP ratios) and the prognostic power of CAR ratio in predicting the mortality associated with FG were investigated. RESULTS: The mean age of the study group, 45 male and 13 female, was 57 (min. 17, max. 85) years. The most common predisposing factor was diabetes mellitus (DM), which was present in 32 (55.1%) patients. The most common symptoms at admission were erythema (89.6%), swelling/hardening (82.7%), pain (41.3%), fever (31%), and purulent discharge (37.9%). Of the 58 patients included in the study, six had died. The most common comorbidity, second to DM (55.1%), was cardiovascular disease (39.6%). The median ages of patients who had died and survived were 60 (min. 56, max. 85) and 56 (min. 18, max. 80) years, respectively. CAR ratio effectively differentiated FG patients who had survived from those who had died (area under the curve [AUC]: 0.907 [0.824-0.984]). The CAR ratio cutoff value of 2.8 effectively differentiated FG patients and FSGI scores who had survived from those who had died (AUC: 0.904 [0.823-0.992]). CONCLUSION: The study findings demonstrated that the CAR ratio might serve as an effective biomarker in predicting the mortal-ity associated with FG.