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Objective To investigate the role of CCAAT enhancer binding protein A (C/EBPα) in lung development by analyzing the relationship between dynamic expression of C/EBPα protein and cell differentiation in rat lung tissue.Methods According to the histological stages of rat lung development,lung tissues were collected on 15.5 d (the late pseudoglandular period),17.5 d (the canalicular period),19.5 d (the early saccular period) of embryonic age and at 12 h (the middle saccular period),on 4 d (the late saccular period),7 d (the alveolar period,the alveolar stage),14 d (the alveolar period,the equilibrium stage) of postnatal age.The lung morphologic appearance was observed by using HE staining.Western blot was used to detect the expressions of C/EBPα and surfactant Protein (SP)-A,SP-B,SP-C,SP-D.Phosphatidylcholine (PC) assay kit was utilized to analyze the secretion of PC.Periodic acid-schiff (PAS) staining was used to evaluate the amcunt of glycogen in lung tissue.Results (1) C/EBPαt and SP-A began to express on 15.5 d of embryonic age (0.36 ±0.02,0.01 ±0.01),while SP-B,SP-C and SP-D started to express on 17.5 d of embryonic age (0.33 ±0.06,0.01 ±0.01,0.11 ±0.08).All of them increased with the development of lung,and C/EBPα,SP-A,SP-C reached the highest level at 12 h of postnatal age (3.48 ±0.05,3.24 ± 0.19,1.26 ± 0.21),and SP-D on the postnatal 4 d (1.48 ± 0.10),then gradually decreased,while the expression of SP-B continued to rise.The levels of C/EBPα and SPs maintained stable on postnatal 14 d.The C/EBPα protein level was positively correlated with SPs at embryonic age of 15.5 d,17.5 d,19.5 d and postnatal age 12 h (r =0.999,0.991,0.982,0.951,all P ＜ 0.05).(2) The level of PC was very low at embryonic age of day 15.5 [(60.50 ± 1.30) μg/g].With the development of lung,the secretion of PC increased gradually,but there was no significant correlation between the expression of PC and C/EBPoα(all P ＞ 0.05).(3) The level of glycogen was high in the late pseudoglandular stage (15.5 d) (585.50 ± 2.20),the content of glycogen decreased with the development of lung,especially on the canalicular (embryonic day 17.5) and during early saccular period (embryonic day 19.5),and then it became stable during the alveolar period (postnatal age 7 d).The expression of C/EBPα had negative correlation with the content of glycogen in fetal lung(r =-1.000,P ＜ 0.01).Conclusion C/EBPα plays an important role in rat lung development,as it may promote lung maturation by regulating the synthesis and secretionof SPs and PC.
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Purpose To analyze the relationships between glomerular filtration rate (GFR) measured by SPECT and renal parenchyma thickness and enhanced CT value measured by CT, and to explore predictive significance of CT in evaluating renal function of patients with hydronephrosis.Materials and Methods One hundred and fifteen patients diagnosed with unilateral hydronephrosis by ultrasound were retrospectively analyzed. GFR% (GFR percentage of affected kidney to the both kidneys) was measured by SPECT. CT% (percentage of affected renal parenchyma thickness to the both kidneys) and enhanced CT% (percentage of enhanced CT value of affected kidney to the both kidneys) were measured by pre- and post-contrast CT scan. According to GFR, the renal function was divided into mild-to-moderate impairment, severely impairment and non-function. Twenty-five volunteers were recruited as control group. CT%, enhanced CT% and GFR%among the four groups were compared, and the correlation of CT% and enhanced CT%with GFR% was analyzed to evaluated CT in predicting renal function.Results CT%, enhanced CT% and GFR% in mild-to-moderate impairment group was significantly greater than those in severely impairment group and non function group (F=20.24, 7.78 and 329.21,P<0.05). GFR% was positive correlated with CT% (r=0.58,P<0.05) and enhanced CT% (r=0.61,P<0.05). Area under curve (AUC) of CT% were 0.54, 0.79 and 0.83 for mild-to-moderate impairment, severely impairment and non-function, with sensitivity of 92.91%, 93.47%, 65.72%, and specificity of 35.33%, 59.47%, and 88.62%, respectively. AUC of enhanced CT% were 0.79, 0.89 and 0.96 for the three groups, with sensitivity of 97.51%, 80.02%, 97.66%, and specificity of 58.14%, 89.82% and 94.27%, respectively.Conclusion There was high correlation between renal function imaging by SPECT and CT in evaluating renal function of hydroneohrosis patients. Pre- and post-contrast CT scan can be used as complements in predicting renal function, and post-contrast CT with high accuracy.
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<p><b>OBJECTIVE</b>To evaluate the effect of bleomyin A5 combined with phosphorus-32 colloid in the treatment of mucocele.</p><p><b>METHODS</b>A total of 214 patients divided into three groups, bleomyin A5 (50 cases), phosphorus-32 colloid (50 cases) and bleomyin A5 combined with phosphorus-32 colloid (114 cases).</p><p><b>RESULTS</b>The efficacy of bleomyin A5 group, phosphorus-32 colloid group, and bleomyin A5 combined with phosphorus-32 colloid group was 84% (42/50), 82% (41/50) and 98% (112/114), respectively. There were significant difference in efficacy among the three groups (P < 0.05). The phosphorus-32 colloid group and the bleomyin A5 group had no significant difference in efficacy (P > 0.05).</p><p><b>CONCLUSIONS</b>The independent use of bleomyin A5 and phosphorus-32 colloid is effective, but the combined use of the two methods is more effective.</p>
Subject(s)
Humans , Bleomycin , Therapeutic Uses , Colloids , Combined Modality Therapy , Methods , Mucocele , Therapeutics , Phosphorus , Phosphorus Radioisotopes , Therapeutic Uses , Treatment OutcomeABSTRACT
BACKGROUND: As a candidate gene of congenital heart disease, ACTC1 gene is related to congenital atrial septal defect inhumans.OBJECTIVE: To perform a mutation screen of ACTC1 gene in 110 nuclear families of congenital heart disease.METHODS: A case-control study was conducted based on 110 nuclear families of congenital heart disease and 300 normalhuman beings with no reported cardiac malformation. Six fragments in the coding region of ACTC1 gene was amplified by PCR invitro using five primers pairs. PCR products were screened for gene mutations.RESULTS AND CONCLUSION: A novel G-to-A variant was found at the third nucleotide of the intron downstream from exon 5.This mutation existed in a 5-year-old female with an isolated ventricular septal defect and her 30-year-old father, who had noreported cardiac anomalies. This mutation was not detected in 300 normal controls. These findings indicate that the mutation maybe related with congenital ventricular septal defects in humans.
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Objective To explore and evaluate the effect of 32P and pinyangmycin injected in combination for the treatment of maxillofacial hemangioma. Methods The patients were randomly divided into three groups. The first group of patients was treated with 32P; 100 patients were enrolled in this group, of which 37 were male and 63 female. 32P dosage between 0.37 and 0. 74 MBq per cm3 was prepared together with 0.5 ml of 2 %lidocaine, and appropriate normal saline, and then the mixture was injected into hemangioma every two weeks. The second group was given pinyangmycin, and the third group received both 32P and pinyangmycin. The second group included 30 male and 60 female, and the third group 64 male and 136 female. The dose and frequency were given as the same to the first group. Results 88.5 % of patients were cured using both 32P and pinyangmycin, and the cure rate was 77.0 % and 71.7 % with either 32P or pinyangmycin. Conclusion These results prove that 32P and pinyangmycin injected in combination for the treatment of maxillofacial hemangioma is more effective than either 32P or pinyangmycin alone, and furthermore, the method is easy, safe and has less complications.