【Abstract】ObjectiveTo measure the expressions of Fas/FasL mRNA in normal liver, adjacent non-cancerous liver parenchyma and hepatocarcinoma, and to explore the relationship between the expressions of Fas/FasL mRNA in those tissues and the hepatocellular carcinogenesis. MethodsSemi-quantity reverse transcript-ploymerase chain reaction(QRTPCR) were performed to measure the relative quantity of the Fas and FasL mRNA expressions in normal liver (n=25), adjacent noncancerous liver parenchyma(n=40) and hepatocarcinoma(n=40). ResultsThe relative quantity of Fas and FasL mRNA expressed in normal liver, adjacent non-cancerous liver parenchyma and hepatocarcinoma were 0.792±0.039 vs 0.245±0.043，0.857±0.031 vs 0.429±0.035 and 0.473±0.047 vs 0.185±0.041, respectively. The relative quantity of Fas mRNA expression in hepatocarcinoma was lower than that of normal liver tissue and adjacent non-cancerous liver parenchyrna (P＜0.05). The relative quantity of FasL mRNA expression in hepatocarcinoma was also lower than that of normal liver tissue (P＜0.05) and adjacent non-cancerous liver parenchyma (P＜0.01), but its expression in adjacent non-cancerous liver parenchyma was higher than that of normal liver tissue (P＜0.05).ConclusionHepatorcarcinoma may escape the immune surveillance of the host, not only by means of reducing Fas expression, but also through adjacent non-cancerous liver parenchyma’s increasing expression of FasL to induce apoptosis of contact lymphocyte which highly expresses Fas.
Objective To investigate the rationale of immune privilege of testicular sertoli cell. Methods Testicular sertoli cell was prepared by digested collagenase, trypsin, and Dnase. In vitro, the sertoli cells were culture together with active lymphocytes to observe the effect on killing lymphocytes. SABC was used for labeling the Fas ligand on testicular sertoli cell.Results In vitro, sertoli cell can kill the active lymphocytes, and testicular sertoli cell expresses the Fas ligand. Conclusion Fas ligand expressing on the testicular sertoli cell may be the cause of immune privilege of testicular.
ObjectiveTo evaluate the effect of pre-infusion of allogeneic lymphoyctes treated with 5-FU on the rat liver graft. MethodsRat liver transplant models from Wistar to SD were established. Four groups were designed as following: control group: only liver transplantation without any other intervention; lymphocytes group: 1 ml of untreated lymphocytes (5×106/ml) from Wistar rats were preinfused into SD rats on day 7 and 4 separately before transplantation; lymphocytes with low concentration of 5-FU group: low concentration 5-FU (7.5 μg) treated lymphocytes were preinfused as above; lymphocytes with high concentration of 5-FU group: high concentration 5-FU (15 μg) treated lymphocytes were preinfused as above. Fas-L and CD8 expression were detected by immunohistochemistry method on day 7 after transplantation. ResultsThe integral opticaldensity (IOD) of Fas-L positive lymphocytes in the lobules of liver and portal areas were higher in lymphocytes with low concentration of 5-FU group than in the other groups （Plt;0.05）. There was no difference between lymphocyte group and lymphocytes with high concentration of 5-FU group （Pgt;0.05）. The IOD of CD8+ expression in lobules of liver was not different among all the three lymphocytes treated groups （Pgt;0.05）. But in portal areas, CD8+ expression was lower in the lymphocytes with low concentration of 5-FU group than in the other groups （Plt;0.05）. ConclusionPreinfusion of lymphocytes treated with low concentration 5-FU can induce graft immune tolerance, the probable mecanism of which is the increasing Fas-L expression in graft.
Objective To explore the expressions of Galectin-3, Fascin-1, and β-catenin protein in colorectal adenocarcinoma and the relations to clinicopathologic characteristics. Methods The expressions of Galectin-3, Fascin-1, and β-catenin protein were detected in 60 cases of colorectal adenocarcinoma, 30 cases of adenoma, and 30 cases of normal mucosa by microwave-EliVisionTM immunohistochemistry method, and analyzed the expressions of them and the relations to clinicopathologic characteristics. Results The expression rate of Galectin-3, Fascin-1, and β-catenin protein in CRC was 68.3% （41/60）, 53.3% （32/60）, and 81.7% （49/60） respectively, which was 46.7% （14/30）, 30.0% （9/30）, and 43.3% （13/30） respectively in adenoma, and 20.0% （6/30）, 3.3% （1/30）, and 13.3% （4/30） respectively in normal mucosa, the differences had statistical significance （P＜0.05）. The expressions of Galectin-3, Fascin-1, and β-catenin protein had statistically significant correlation with the TNM stage, invasive degree, and lymph node metastasis of colorectal adenocarcinoma （P＜0.05, P＜0.01）. The expressions of Galectin-3 and β-catenin protein had statistically significant correlation with the different differentiation degree of colorectal adenocarcinoma （P＜0.05）, but the expression of Fascin-1 protein was not related to differentiation degree of colorectal adenocarcinoma （P＞0.05）.The expressions of Galectin-3, Fascin-1, and β-catenin protein had not statistically significant correlation with the patient’s age and gender, and tumour size （P＞0.05）.There were positive correlations between the Galectin-3 and Fascin-1 or β-catenin （r=0.728，P＜0.01；r=0.696，P＜0.01）, and there was positive correlation between β-catenin and Fascin-1 （r=0.507，P＜0.01）. Conclusions The high expressions of Galectin-3, Fascin-1, and β-catenin protein in colorectal adenocarcinoma tissues are some extent correlated to the high invasive ability and lymph node metastasis, which could be used for the indexes to predict the invasion and metastasis in colorectal carcinoma potentially.
Objective To investigate the expression of Fascin-1 protein in colorectal adenocarcinoma, and the relationship with its clinicopathologic features. Methods The expressions of Fascin-1 protein in colorectal adenocarcinoma tissues of 60 cases, colorectal adenoma tissues of 30 cases and normal mucosa tissues (4 cm distance to neoplasm) of 30 cases were detected by Microwave-EliVisionTM immunohistochemistry method, and the relationship between the expression of Fascin-1 protein in colorectal adenocarcinoma tissues and its clinicopathologic characteristics was analyzed. Results The expression of Fascin-1 protein was located in cytoplasm. The positive expression rates of Facsin-1 protein were 3.3% (1/30), 30.0% (9/30) and 53.3% (32/60) in normal mucosa tissues, colorectal adenoma tissues and colorectal adenocarcinoma tissues, respectively. The expression of Fascin-1 was gradually increased in these three tissues, and there was statistical difference among the three tissues (Plt;0.05). The expessions of Fascin-1 protein in patients with serous membrane invasion, lymph node metastasis and TNM Ⅲ+Ⅳ were higher than those of non-serous membrane invasion, non-lymph node metastasis and TNM Ⅰ+Ⅱ (Plt;0.05), but there was no significant difference among different differentiation degrees (Pgt;0.05). Conclusion The high expression of Fascin-1 protein is correlated to high invasion ability and lymph node metastasis, which can play as a sensitive index in predicting the invasion and metastasis of colorectal adenocarcinoma.
Objective To investigate the effect of the drug-resistance characteristic of neoplasm cell on the expression of Fas during the chemical medi-cure.Methods The adriamycin-resistance hepatic carcinoma cells (HepG2 cell lines) were estabilished by cell biology. Changes of expression of the HepG2 cell lines was determined by immunohistochemistry. Results When the HepG2 cell lines were not induced by adriamycin, the expression of Fas of them was weak and Fas mainly existed in cell membrane. When induced by adriamycin, the expression was enhanced and Fas mainly existed in cytochylema. Simultaneously, the death rate of the cell lines changed. The death rate of the drug-resistance cell lines in 0.1 μg/ml ADM was almost as same as that of non-drug-resistance cell lines without ADM (Ｐ＞0.05) and was significantly different from that of non-drug-resistance cell lines in 0.1 μg/ml ADM (Ｐ＜0.05). Conclusion Changes of the expression of Fas may be one of the drug-resistance mechanisms of carcinoma cell.
ObjectiveTo compare the short-term effectiveness of suture hook suture via double posteromedial approaches and Fast-Fix total internal suture in treatment of Ramp lesions. Methods A clinical data of 56 patients with anterior cruciate ligament rupture combined with Ramp lesions, who met the selection criteria and admitted between December 2021 and February 2023, was retrospectively analyzed. The Ramp lesions were sutured using suture hook via double posteromedial approaches under arthroscopy in 28 cases (group A) and treated with Fast-Fix total internal suture under arthroscopy in 28 cases (group B). There was no significant difference in age, gender, cause of injury, type of injury, time from injury to operation, side of injury, body mass index, and preoperative Lysholm score, visual analogue scale (VAS) score, and Tegner score between the two groups (P>0.05). The patients were followed up regularly after operation, and the clinical and imaging healing of the Ramp lesion was evaluated according to the Barrett clinical healing standard and the MRI evaluation standard. Lysholm score, VAS score, and Tegner score were used to evaluate the function and pain degree of knee joint, and the results were compared with those before operation. ResultsThe incisions of the two groups healed by first intention. All patients were followed up 12-18 months (mean, 14.9 months). Postoperative McMurray tests were negative in both groups. The clinical healing rates of group A and group B were 71.4% (20/28) and 64.3% (18/28) at 6 months after operation, and 92.9% (26/28) and 82.1% (23/28) at 12 months after operation, respectively. The differences between the two groups was not significant (χ2=0.327, P=0.567; χ2=0.469, P=0.225). There was no significant difference in Lysholm score, VAS score, and Tegner score between the two groups at each time point after operation (P>0.05). The postoperative scores in the two groups significantly improved when compared with those before operation, and the scores at 12 months after operation further improved when compared with those at 6 months after operation, showing significant differences between the different time points in the two groups (P<0.05). At last follow-up, MRI examination of the knee joint showed that there were 26 (92.9%), 2 (7.1%), and 0 (0) cases of complete healing, partial healing, and nonunion in the Ramp lesion of group A, and 25 (89.3%), 1 (3.6%), and 2 (7.1%) cases in group B, respectively. There was no significant difference between the two groups (Z=?0.530, P=0.596). ConclusionSuture hook suture via double posteromedial approaches and Fast-Fix total internal suture under arthroscopy are safe and reliable in the treatment of Ramp lesion, and the knee joint function significantly improves after operation.
The number of white blood cells in the leucorrhea microscopic image can indicate the severity of vaginal inflammation. At present, the detection of white blood cells in leucorrhea mainly relies on manual microscopy by medical experts, which is time-consuming, expensive and error-prone. In recent years, some studies have proposed to implement intelligent detection of leucorrhea white blood cells based on deep learning technology. However, such methods usually require manual labeling of a large number of samples as training sets, and the labeling cost is high. Therefore, this study proposes the use of deep active learning algorithms to achieve intelligent detection of white blood cells in leucorrhea microscopic images. In the active learning framework, a small number of labeled samples were firstly used as the basic training set, and a faster region convolutional neural network (Faster R-CNN) training detection model was performed. Then the most valuable samples were automatically selected for manual annotation, and the training set and the corresponding detection model were iteratively updated, which made the performance of the model continue to increase. The experimental results show that the deep active learning technology can obtain higher detection accuracy under less manual labeling samples, and the average precision of white blood cell detection could reach 90.6%, which meets the requirements of clinical routine examination.
Objective To investigate the protective effects of recombinant human insulin-like growth factor-1 ( rhIGF-1) on apoptosis of diaphragm in rats with COPD and its impact on pulmonary function. Methods Forty-five male Wistar rats were randomly divided into three groups, ie. a normal control group, a model group, and an IGF-1 intervention group, with 15 rats in each group. The rats in the model group and IGF-1 group were exposed to 5% smoke ( 30 min perday, lasting 28 days) in a sealed box, and 200 μg lipopolysaccharide was injected intratracheally on the 1st and 14th day. The rats in the IGF-1 group were given rhIGF-1 ( 60 μg /100 g) additionally by subcutaneous injection once a day, lasting 28 days. On the 1st, 14th, 28th day, 5 rats from each group were sacrificed. The weight, rate of apoptosis, Fas gene and Fas protein expression of isolated diaphragms were detected. The pulmonary function was measured on the 28th day before sacrificed. Results The mass of diaphragms, minute ventilation ( VE) , peak expiratory flow ( PEF) , inspiratory capacity ( IC) , forced expiratory volume in 0. 3 second ( FEV0. 3) of themodel groupand IGF-1 group were all decreased compared with the control group ( P lt; 0. 05) . The mass of diaphragms, VE, IC of the IGF-1 group were higher than those of the model group ( P lt;0. 05) , and the differences of PEF and FEV0. 3 were not significant ( P gt; 0. 05) . On the 14th, 28th day, rate of apoptosis, Fas gene and protein expressions in the IGF-1 group were lower than those in the model group, and still higher than those in the control group ( P lt; 0. 05) . Conclusions Fas/FasL mediated apoptosis way is involved in the diaphragm apoptosis. rhIGF-1 may reduce the apoptosis of the diaphragmand improve the VE and IC of rats with COPD by intervening Fas/FasL pathway.
Objective To understand the molecular mechanism of HBx in the carcinogenesis of hepatitis B virus (HBV) related hepatocellular carcinoma (HCC).Methods The literatures published in the past 5 years which are mainly about HBx and hepatocellular carcinoma were reviewed. Results HBx had many functions, such as cell malignant transformation, inhibiting DNA repair, trans-activation, inhibiting p53 and apoptosis. These functions together with its Fas/Fas-L interfering and caspase-3 inhibiting could contribute to the carcinogenesis and development of HBV relatde HCC. Conclusion HBx has broad spectrum of biological functions, which contribute to the carcinogenesis and development of HBV related HCC.
