Expression and clinical significance of serum ubiquitin in esophageal squamous cell carcinoma / 医学研究生学报

Objective　Ubiquitin-proteasome system (UPS) plays a central role in the development of esophageal cancer. However, As the executor of UPS, the expression and clinical significance of detection of serum ubiquitin (UB) in Esophageal Squamous Cell Carcinoma(ESCC) patients have not been fully elucidated. The aim of this study was to investigate the expression and diagnostic value of serum ubiquitin (UB) in ESCC.　Methods　A total of eighty-eight ESCC patients and forty healthy controls from February 2018 to May 2019 at the Affiliated Jiangyin Hospital of Nantong University were enrolled. Serum UB was measured by ELISA, and serum squamous cell carcinoma antigen (SCC) and carcinoembryonic antigen (CEA) were determined by chemiluminescence method. The ROC curve was used to analyze the diagnostic value of each indicator. Besides, the correlation between serum UB and clinicopathological features of ESCC were analyzed.　Results　The level of serum UB in ESCC group was significantly higher than that in the control group[(41.96±3.273)ng/ml vs (80.86±7.993)ng/ml, P<0.05]. The level of serum UB in ESCC patients was related to lymphatic metastasis and tumor stage (P<0.05). The sensitivity of UB, SCC, CEA and the three combined diagnosis of ESCC were 65.9%, 52.3%, 51.1%, and 76.1%, respectively. The AUC under the ROC curve were 0.690, 0.677, 0.635, and 0.795, respectively.　Conclusion　Serum UB is highly expressed in ESCC and is closely related to tumor progression. Combined with SCC and CEA, UB can improve the sensitivity of diagnosis of ESCC and can be used as an effective serological screening biomarker.

Expression of Wnt5a in the terminal rectum of children with anorectal malformation / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To study the expression of Wnt5a protein in the terminal rectum of children with anorectal malformation (ARM) and the possible association between Wnt5a and ARM.</p><p><b>METHODS</b>Specimens were obtained from 20 children with ARM, 7 children with acquired rectovestibular fistula and 6 children with non-gastrointestinal tract disease (control group). The expression of Wnt5a protein in the terminal rectum was determined by immunohistochemistry and Western blot.</p><p><b>RESULTS</b>Wnt5a was mainly expressed in the rectum of the myenteric nerve plexus, mucosal layer and submucosa in the control group. Compared with the control group, Wnt5a expression in the terminal rectum decreased significantly in the ARM group, and decreased more significantly in children with high ARM. The results of Western blot showed the expression of Wnt5a protein in the high, intermediate and low ARM groups were significantly lower than that in the acquired rectovestibular fistula and the control groups (P<0.01). The expression of Wnt5a protein in the high and the intermediate ARM groups were also lower than that in the low ARM group (P<0.01). There was no significant difference in the Wnt5a protein expression between the acquired rectovestibular fistula and the control groups.</p><p><b>CONCLUSIONS</b>The expression of Wnt5a in the termina1 rectum decreases in children with ARM, suggesting Wnt5a may play an important role in the development of ARM.</p>

Expression and significance of Notch-1 and Jagged-2 in patients with Hirschsprung disease / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the expression of Notch-1 and Jagged-2 in the normal and spastic segments of colon in patients with Hirschsprung disease(HD), and to explore the correlation of Notch-1 and Jagged-2 with pathogenesis of HD.</p><p><b>METHODS</b>From 2005 to 2010, resected colon specimens of 30 cases with HD were selected for this study. Normal colonic segments were served as control group, while the transitional and spastic segments as experimental group. Immunohistochemical staining, Western blotting, and RT-PCR were applied to detect the expression of Notch-1 and Jagged-2.</p><p><b>RESULTS</b>A large number of Notch-1 and Jagged-2 positive gangliocytes were observed in the control group, while none was observed in spastic segments. Significantly less Notch-1 and Jagged-2 positive gangliocytes were found in the transitional segments. Western blotting revealed that Notch-1 and Jagged-2 protein levels in spastic segments (0.19±0.02 and 0.13±0.04) were less than that in transitional segments and normal segments (0.58±0.05 and 0.52±0.04, 0.72±0.04 and 0.69±0.04, respectively)(P<0.05). RT-PCR revealed that Notch-1 and Jagged-2 mRNA levels were consistent with protein expression.</p><p><b>CONCLUSION</b>Notch-1 and Jagged-2 are not expressed in spastic colon segments, which may be associated with the pathogenesis of HD.</p>

Solid cystic papillary tumor of pancreas in eight children / 中国医学科学杂志(英文版)

<p><b>OBJECTIVE</b>To estimate the clinical and pathological features of pancreatic solid cystic papillary tumor (SCPT) in children.</p><p><b>METHODS</b>From 2000 to 2005, 8 cases with SCPT of the pancreas were analyzed retrospectively. All cases but one were females. Average age was 12.8 years. By case review, we discussed the clinical and pathological features of SCPT in children.</p><p><b>RESULTS</b>The chief complains were abdominal pain and palpable mass. There were 3 cases in the head, 1 case in the body, and 4 cases in the tail of pancreas. The procedures employed included local resection (1 case), distal pancreatectomy (5 cases), pancreaticoduodenectomy (1 case), and biopsy (1 case). Histological examination showed solid with cystic areas and papillary protrusions in the 8 cases; as for immunohistochemical examinations, the positive rate was 100% for alpha-antitrypsin (AACT), 87.5% for vinmentin, and 62.5% for neuron-specific enolase (NSE). The patients were followed up for 2 months to 4 years but one was lost by follow-up and all were alive postoperatively. SCPT in 2 cases relapsed.</p><p><b>CONCLUSION</b>Occurring predominantly in young females, SCPT is usually curable by surgical resection with a favorable prognosis.</p>

Diagnosis and treatment of mediastinal enterogenous cysts in children / 中国医学科学杂志(英文版)

<p><b>OBJECTIVE</b>To investigate the diagnosis and therapy of mediastinal enterogenous cysts in children.</p><p><b>METHODS</b>Clinical data of 17 cases with mediastinal enterogenous cysts within 19 years in our hospital were retrospectively analyzed.</p><p><b>RESULTS</b>One case was intramural esophageal cyst and 16 cases were enteric cysts, two among which were complicated with abdominal enteric duplications. Most cases presented with symptoms of respiratory distress. Twelve cases were complicated with vertebral anomalies. Ultrasound of 12 cases and magnetic resonance imaging of 4 cases were helpful in confirming the cystic nature of these lesions. Eight cases had technetium-99m pertechnetate scintigraphy of posterior mediastinum.</p><p><b>CONCLUSIONS</b>Most patients present with symptoms of respiratory distress, complicated with vertebral anomalies. Ultrasonography and magnetic resonance imaging may be helpful in confirming the cystic nature of these lesions. Technetium-99m pertechnetate scintigraphy is the most effective method for differentiation of the disease from other mediastinal cysts.</p>

Survey and analysis of the results of creatinine measurement by 31 detection systems of 13 hospitals in Beijing / 中华检验医学杂志

Objective Understand the variation of serum creatinine measurement in clinical laboratories of some hospitals in Beijing.Methods 8 samples of mixed frozen human serum added different creatinine concentration standard materials(the creatinine concentration were80-1 000 ?mol/L)and 8 samples of mixed frozen serum of patients(contained different creatinine concentration)were distributed to 13 clinical laboratories(31 series of detection systems)with the way of spot investigation.Every clinical laboratories measured the samples followed the standard operating procedure.Results As to the mixed frozen human serum added different creatinine standard materials,the CV of different detection systems results were 5.74%-9.68%;as to the mixed frozen patients' serum,the CV was 5.90%-11.69%. Compared with Beckman closed detection systems,the results of Dade systems(which used the kinetic alkaline pieric acid method)showed the bias were-5.99%-0.35%,and as to the other systems which measured by alkaline picric acid method,when creatinine concentrations were 200 ?mol/L,the results showed negative bias,and the greatest bias was-8.45%.The bias plots revealed negative for all of the detection systems with enzymatic method over the whole concentration range,and the greatest bias was -8.88%.Conclusions The creatinine determination results of Beckman and Dade closed detection systems were consistent.The results of detection systems which used enzymatic method were generally lower than Beckman detection systems.What's more,the creatinine measurement variations of clinical laboratories were very large,especially for the results of unclosed detection systems,so it was urgent need to solve the standardization of creatinine measurement.

Biases and interlaboratory variations of gamma-glutamyltransferase measurements before and after calibration with a common human serum calibrator / 中华检验医学杂志

Objective To investigate the accuracy and comparability of ?-glutamyltransferase (?- GT) measurement results on human serum samples and controI materials before and after calibration with a common human serum calibrator.Methods A human serum calibrator was prepared by pooling fresh serum aliquots and assigning a value for ?-GT with the IFCC reference method.The calibrator together with 5 human serum samples and 10 control samples were sent to 15 clinical laboratories and the sermn and control samples were measured with different analytical systems before and after a calibration with the calibrator.The results were analyzed for biases and interlaboratory variations.Results For the serum samples,the calibration resulted in reductions in biases from -9.0%～-14.2% to -0.8%～-7.9%,and in interlaboratory variations from 6.9%～11.6% to 2.8%～4.4%.No improvement was observed on the control samples.Conclusions Accuracy and comparability of serum ?-GT measurements can be improved by using a common human serum calibrator.Some control materials may not be commutable for human serum in ?-GT measurements.