Background: Neonatal hyperbilirubinemia is indeed common. However, severe nerve injuries and bilirubin encephalopathy are rare and only occur in the unusual cases of extreme hyperbilirubinemia. Objectives: To investig...Background: Neonatal hyperbilirubinemia is indeed common. However, severe nerve injuries and bilirubin encephalopathy are rare and only occur in the unusual cases of extreme hyperbilirubinemia. Objectives: To investigate brain magnetic resonance imaging (MRI) changes and their correlations with perinatal predisposing factors in neonates with indirect hyperbilirubinemia, via regions of interest (ROIs) analysis. Methods: Seventy-six neonates with a gestational age of ≥35 weeks diagnosed with neonatal indirect hyperbilirubinemia or bilirubin encephalopathy all underwent brain MRI during hospitalization. Depending on peak total serum bilirubin (TSB), they were assigned to group A (<221 μmol/L), B (≥221 μmol/L μmol/L), C (≥42 μmol/L μmol/L), or D (≥428 μmol/L). The globus pallidus and the white matter around the anterior horn of the lateral ventricle and posterior horn of the lateral ventricle were selected as the ROIs. Average optical densities (AODs) of the ROIs and the cerebrospinal fluid region were measured. The ratio between the AODs was designated as the relative optical density (ROD), and used to determine relative signal intensity. Results: RODs of the globus pallidus were significantly lower in group D than in all other groups. TSB and the ratio of TSB to serum albumin concentration (B/A) was significantly negatively correlated with ROD in theglobus pallidus. Corrected age was significantly negatively correlated with the ROD of the ROIs. Conclusions: Semi-quantitative image analysis is a feasible method to assess conventional brain MRI for neonatal indirect hyperbilirubinemia. The signal intensity of the globus pallidus in T1-weighted images was significantly correlated with TSB level and B/A.展开更多
Background: Bilirubin is the metabolic end-product of heme degradation by heme oxy-genase (HO), which has recently been shown to act as an antioxidant which can protect against atherosclerosis. This study explored the...Background: Bilirubin is the metabolic end-product of heme degradation by heme oxy-genase (HO), which has recently been shown to act as an antioxidant which can protect against atherosclerosis. This study explored the relationship between serum bilirubin levels and different degrees of atherosclerotic stenosis in intracranial or extracranial arteries. Methods: The study included 189 patients undergoing digital subtraction angiography (DSA) diagnosed as being normal or having been confirmed as atherosc lerotic stenosis in the intracranial or extracranial arteries. The patients were allocated to normal, mild (Results: Indirect bilirubin (Ibil) concentrations increased in parallel with the increasing severity of atherosclerotic stenosis in the intracranial or extracranial arteries, but decreased in patients with occluded cranial vessels. Multivariate analysis showed that Ibil levels were significantly higher in patients with severe stenosis group than in those with mild stenosis (OR, 1.464;95% CI, 1.050 - 2.042;P = 0.024). However, Ibil levels were significantly lower in patients with occlusion than in those with severe stenosis (OR, 0.790;95% CI, 0.684 - 0.913;P = 0.001). Conclusions: Ibil appears to have a protective effect against the development of atherosclerotic stenosis in intracranial or extracranial arteries. The biosynthesis of Ibil increases with stenosis progresses but decreases once occlusion occurs.展开更多
BACKGROUND Many biomarkers have predictive value for overall survival(OS)and disease-free survival(DFS)in tumor patients.However,the role of indirect bilirubin(IBIL)in local advanced rectal cancer(LARC)patients treate...BACKGROUND Many biomarkers have predictive value for overall survival(OS)and disease-free survival(DFS)in tumor patients.However,the role of indirect bilirubin(IBIL)in local advanced rectal cancer(LARC)patients treated with neoadjuvant chemoradiotherapy(nCRT)has not been studied.AIM To explore the predictive value of IBIL before nCRT(pre-IBIL)for the OS and DFS of LARC patients treated with nCRT.METHODS A total of 324 LARC patients undergoing nCRT with total mesorectal excision(TME)were enrolled.Preoperative clinical features and postoperative pathological characteristics were collected.Cox regression analysis was performed,and a Cox-based nomogram was developed to predict OS and DFS.We also assessed the predictive performance of the nomogram with calibration plots and receiver operating characteristic(ROC)curves.RESULTS Among 324 patients,the median pre-IBIL was 6.2μmol/L(interquartile range:4.6μmol/L-8.4μmol/L).In the Cox multivariate regression analysis,we found that pre-IBIL,smoking history,tumor regression grade(TRG),vascular invasion,and carbohydrate antigen 19-9 before nCRT(pre-CA19-9)were predictors of OS.Additionally,pre-IBIL,body mass index(BMI),nCRT with surgery interval,TRG,and vascular invasion were predictors of DFS.Predictive nomograms were developed to predict 5-year OS and 5-year DFS with area under the ROC curve values of 0.7518 and 0.7355,respectively.Good statistical performance on internal validation was shown by calibration plots and ROC curves.CONCLUSION This study demonstrated that pre-IBIL was an independent prognostic factor for OS and DFS in LARC patients treated with nCRT followed by TME.Nomograms incorporating pre-IBIL,BMI,smoking history,nCRT with surgery interval,TRG,vascular invasion,and pre-CA19-9 could be helpful to predict OS and DFS.展开更多
文摘Background: Neonatal hyperbilirubinemia is indeed common. However, severe nerve injuries and bilirubin encephalopathy are rare and only occur in the unusual cases of extreme hyperbilirubinemia. Objectives: To investigate brain magnetic resonance imaging (MRI) changes and their correlations with perinatal predisposing factors in neonates with indirect hyperbilirubinemia, via regions of interest (ROIs) analysis. Methods: Seventy-six neonates with a gestational age of ≥35 weeks diagnosed with neonatal indirect hyperbilirubinemia or bilirubin encephalopathy all underwent brain MRI during hospitalization. Depending on peak total serum bilirubin (TSB), they were assigned to group A (<221 μmol/L), B (≥221 μmol/L μmol/L), C (≥42 μmol/L μmol/L), or D (≥428 μmol/L). The globus pallidus and the white matter around the anterior horn of the lateral ventricle and posterior horn of the lateral ventricle were selected as the ROIs. Average optical densities (AODs) of the ROIs and the cerebrospinal fluid region were measured. The ratio between the AODs was designated as the relative optical density (ROD), and used to determine relative signal intensity. Results: RODs of the globus pallidus were significantly lower in group D than in all other groups. TSB and the ratio of TSB to serum albumin concentration (B/A) was significantly negatively correlated with ROD in theglobus pallidus. Corrected age was significantly negatively correlated with the ROD of the ROIs. Conclusions: Semi-quantitative image analysis is a feasible method to assess conventional brain MRI for neonatal indirect hyperbilirubinemia. The signal intensity of the globus pallidus in T1-weighted images was significantly correlated with TSB level and B/A.
文摘Background: Bilirubin is the metabolic end-product of heme degradation by heme oxy-genase (HO), which has recently been shown to act as an antioxidant which can protect against atherosclerosis. This study explored the relationship between serum bilirubin levels and different degrees of atherosclerotic stenosis in intracranial or extracranial arteries. Methods: The study included 189 patients undergoing digital subtraction angiography (DSA) diagnosed as being normal or having been confirmed as atherosc lerotic stenosis in the intracranial or extracranial arteries. The patients were allocated to normal, mild (Results: Indirect bilirubin (Ibil) concentrations increased in parallel with the increasing severity of atherosclerotic stenosis in the intracranial or extracranial arteries, but decreased in patients with occluded cranial vessels. Multivariate analysis showed that Ibil levels were significantly higher in patients with severe stenosis group than in those with mild stenosis (OR, 1.464;95% CI, 1.050 - 2.042;P = 0.024). However, Ibil levels were significantly lower in patients with occlusion than in those with severe stenosis (OR, 0.790;95% CI, 0.684 - 0.913;P = 0.001). Conclusions: Ibil appears to have a protective effect against the development of atherosclerotic stenosis in intracranial or extracranial arteries. The biosynthesis of Ibil increases with stenosis progresses but decreases once occlusion occurs.
文摘BACKGROUND Many biomarkers have predictive value for overall survival(OS)and disease-free survival(DFS)in tumor patients.However,the role of indirect bilirubin(IBIL)in local advanced rectal cancer(LARC)patients treated with neoadjuvant chemoradiotherapy(nCRT)has not been studied.AIM To explore the predictive value of IBIL before nCRT(pre-IBIL)for the OS and DFS of LARC patients treated with nCRT.METHODS A total of 324 LARC patients undergoing nCRT with total mesorectal excision(TME)were enrolled.Preoperative clinical features and postoperative pathological characteristics were collected.Cox regression analysis was performed,and a Cox-based nomogram was developed to predict OS and DFS.We also assessed the predictive performance of the nomogram with calibration plots and receiver operating characteristic(ROC)curves.RESULTS Among 324 patients,the median pre-IBIL was 6.2μmol/L(interquartile range:4.6μmol/L-8.4μmol/L).In the Cox multivariate regression analysis,we found that pre-IBIL,smoking history,tumor regression grade(TRG),vascular invasion,and carbohydrate antigen 19-9 before nCRT(pre-CA19-9)were predictors of OS.Additionally,pre-IBIL,body mass index(BMI),nCRT with surgery interval,TRG,and vascular invasion were predictors of DFS.Predictive nomograms were developed to predict 5-year OS and 5-year DFS with area under the ROC curve values of 0.7518 and 0.7355,respectively.Good statistical performance on internal validation was shown by calibration plots and ROC curves.CONCLUSION This study demonstrated that pre-IBIL was an independent prognostic factor for OS and DFS in LARC patients treated with nCRT followed by TME.Nomograms incorporating pre-IBIL,BMI,smoking history,nCRT with surgery interval,TRG,vascular invasion,and pre-CA19-9 could be helpful to predict OS and DFS.
