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Objective:To investigate the role of dendritic cells (DC) in Chlamydia muridarum ( Cm) respiratory infection and their effect on adaptive immune response. Methods:C57BL/6 mice were exposed to 1×10 3 inclusion-forming units (IFU) of Cm through inhalation to establish the mouse model of Cm respiratory infection. The proportion of CD11c + MHCⅡ + DC and the expression of costimulatory molecules (CD40, CD80 and CD86) in spleen tissues were detected by flow cytometry on 0, 3 and 7 d after infection. The expression of IL-12p40, IL-10 and IL-6 at mRNA level in spleen tissues was detected by qPCR. Mouse splenic DC isolated on 7 d after Cm infection were sorted by magnetic beads and then transferred to recipient mice. Th1 response in the recipient mice was measured using intracellular cytokine staining 14 d after infection. Results:Cm respiratory infection induced massive infiltration of DC and promoted the expression of costimulatory molecules on splenic DC. The expression of IL-12 and IL-10 at mRNA level in splenic DC reached the peak on 3 d after infection. Transferring the splenic DC of Cm-infected mice into the recipient mice could alleviate the disease condition in the recipient mice after Cm infection with reduced Cm inclusion-forming units in lung tissues and significantly increased proportion of Th1 cells in lung and spleen tissues. Conclusions:Cm respiratory infection could induce the maturation and activation of DC, which promoted Th1 immune response. DC played an important role in Cm infection.
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Guselkumab is the first monoclonal antibody that selectively targets interleukin (IL) -23. Several randomized controlled clinical trials have demonstrated that it is highly effective and safe in the treatment of moderate to severe plaque psoriasis, and can significantly improve the quality of life of patients. This review summarizes the action mechanisms of IL-23 and guselkumab, as well as the application of guselkumab in the treatment of psoriasis.
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【Objective】 To investigate the quality changes of suspended red blood cells (SRBCs) prepared from the blood of Tibetan high Hb population, and explore the availability and safety of blood collected from Tibetan high Hb population. 【Methods】 The voluntary blood donors were grouped according to the Hb concentration at the initial screening: female blood donors from Tibet Autonomous Region (>3 500 m) with Hb≥190 g/L and male blood donors with Hb≥210 g/L were classified as plateau high hemoglobin group. A total of 13 male blood donors from Tibet Autonomous Region were recruited. And the female blood donors (n=13) with Hb(115~165) g/L and male blood donors (n=12) with Hb(120~185) g/L from Chengdu were classified as control group. Whole blood of 200 mL specification was centrifuged to remove the plasma, and MAP additive solution was added to prepare SRBCs, then SRBCs were divided into four aliquots (50 mL/bag and stored at 4℃. Parameters as blood routine, free Hb and hemolysis rate were measured aseptically at day 1, 14, 21, 35 of storage. And 10 mL SRBCs was used to extract membrane proteins for tyrosine phosphorylation detection of band 3 protein. 【Results】 The RBCs counts(×1012/L), hematocrit(%) and hemoglobin(g/L) of Tibetan high Hb group and control group were 6.76±0.95 vs 4.65±0.52, 63.3±6.8 vs 43.1±4.4 and 214.4±19.8 vs 143.2±16.9 (P<0.01). The erythrocyte deformability test on the day 1, 14, 21, 35 of storage showed that the deformability of SRBCs prepared from Tibetan high Hb group was significantly lower than that of the control group under shear stress of 3, 5.33, 9.49, 16.87, and 30 Pa, while the hemolysis rate of SRBCs prepared from the Tibetan high Hb group and the control group on the day 1, 14, 21, 35 were 0.050 2±0.040 2 vs 0.022 2±0.011 1, 0.055 4±0.043 vs 0.032 1±0.028 7, 0.061 2±0.025 9 vs 0.034 3±0.031 7 and 0.069 6±0.032 0 vs 0.044 0±0.033 3 (P<0.05). Western blotting showed that the cytoplasmic N-terminal Y21 of band 3 protein of SRBCs prepared from Tibetan high Hb group was highly phosphorylated. 【Conclusion】 The deformability of SRBCs prepared from the Tibetan high Hb group was significantly lower while the hemolysis rate of SRBCs was higher than that of the control group. The hemolysis rate of the SRBCs at the end of storage prepared from the Tibetan high Hb group meets the requirements of the national standard GB18469-2012(<0.8%). The increase of hemolysis rate of SRBCs prepared from the Tibetan high Hb group was closely related to the phosphorylation of band 3 protein.
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The pathological hallmarks of psoriasis involve alterations in T cell genes associated with transcriptional levels, which are determined by chromatin accessibility. However, to what extent these alterations in T cell transcriptional levels recapitulate the epigenetic features of psoriasis remains unknown. Here, we systematically profiled chromatin accessibility on Th1, Th2, Th1-17, Th17, and Treg cells and found that chromatin remodeling contributes significantly to the pathogenesis of the disease. The chromatin remodeling tendency of different subtypes of Th cells were relatively consistent. Next, we profiled chromatin accessibility and transcriptional dynamics on memory Th/Treg cells. In the memory Th cells, 803 increased and 545 decreased chromatin-accessible regions were identified. In the memory Treg cells, 713 increased and 1206 decreased chromatin-accessible regions were identified. A total of 54 and 53 genes were differentially expressed in the peaks associated with the memory Th and Treg cells. FOSL1, SPI1, ATF3, NFKB1, RUNX, ETV4, ERG, FLI1, and ETC1 were identified as regulators in the development of psoriasis. The transcriptional regulatory network showed that NFKB1 and RELA were highly connected and central to the network. NFKB1 regulated the genes of CCL3, CXCL2, and IL1RN. Our results provided candidate transcription factors and a foundational framework of the regulomes of the disease.
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Humans , Chromatin/genetics , Chromatin Assembly and Disassembly , Gene Regulatory Networks , Psoriasis/genetics , T-Lymphocytes, RegulatoryABSTRACT
Objective:To investigate the efficiency and safety of traditional growing rod in the treatment of early onset dystrophic scoliosis secondary to type 1 neurofibromatosis (NF1-DS) with intraspinal rib head in children.Methods:From September 2006 to May 2020, this study recruited 20 children with intraspinal rib head with early onset NF1-DS who had received traditional growing rods. There were 13 boys and 7 girls and the age of the initial operation was 7.0±1.6 years (range, 4.1-9.8 years). There were 7 cases of simple left chest bend, 9 cases of simple right chest bend, and 4 cases of double chest bend; 13 patients had varying degrees of kyphosis deformity. Two children had neurological symptoms before surgery, American Spinal Injury Association Impairment Scale (AIS) were grade D. The proportion of the intraspinal rib head (IRP), the Cobb angle of the main chest bend, apical vertebra rotation (AVR), apical vertebral translation (AVT), trunk shift (TS) and sagittal TK, lumbar lordosis (LL), sagittal balance and T 1-S 1 height were measured before and after first time internal fixation and at last follow-up, and the complications were also evaluated. Results:All 20 patients were followed up and the average follow-up time was 41.6±23.8 months (range, 24-99 months). A total of 85 operations was conducted including 63 protrude operations. After operation, the IRP was significantly lower than that before operation (preoperative 33.1%±17.5% vs. postoperative 22.2%±11.3%, P<0.001) and no significant correction loss was found at last follow-up 23.7%±12.4% ( P>0.05). The mean Cobb angle decreased from 75.9°±26.7° preoperatively to 45.0°±18.5° postoperatively ( P<0.001) and there was still significant improvement at the last follow-up (41.0°±17.2°) compared with postoperatively ( P<0.05). The AVR was significantly reduced after surgery compared with preoperatively (33.0°±10.1° vs. 39.3°±13.3°, P<0.001), and the last follow-up (40.1°±11.4°) was significantly improved compared with postoperative ( P=0.005). The T 1-S 1 height increased from 259.8±70.7 mm preoperatively to 296.9±78.4 mm postoperatively ( P=0.001), and at the last follow-up 296.9±78.4 mm was still significantly higher than after operation ( P<0.001), with an average annual increase of 12.4±3.2 mm. Significant correction of AVT, TK, LL and sagittal balance were noted after initial surgery ( P<0.05), and no significant correction loss was found at last follow-up ( P>0.05). There were 10 complications in 7 cases. There were 5 complications of pedicle screw loosening, 1 complication of bolt droping, 2 complications of broken rod, 1 complication of distal junctional kyphosis and 1 complication of adding-on phenomenon. 2 cases with nerve injury were recover after operation (AIS grading E). None of the children had new neurological complications during growth rod insertion and multiple stretching during follow-up. Conclusion:For children with early onset NF1-DS with intraspinal rib head, if the preoperative AIS grade is D or E, traditional growing rod technique is relatively safe and effective and can make the intraspinal rib head remove from the spinal canal partly.
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Objective:To explore the current status of the artificial intelligence (AI) developments in medical imaging in China, and to provide data for the development of AI.Methods:In May 2022, the Radiology Branch of the Chinese Medical Association and the China Medical Imaging AI Industry-University-Research Innovation Alliance jointly launched a nationwide survey on the application status and development needs of medical imaging AI in China in the form of a questionnaire. This survey was carried out for different groups of people, focusing on the clinical applications of medical imaging AI, enterprise development, and educational needs in colleges and universities, with the descriptive statistical analysis performed.Results:China′s medical imaging AI has made great progress in clinical applications, in enterprise developments, as well as in the education and teaching areas. In terms of clinical application, 90.8% (5 765/6 347) of the survey respondents had a preliminary understanding of AI. There were 62.1% (3 798/6 119) doctors confirmed the applications medical imaging AI products in their departments. AI products were applied in the whole process of medical imaging examination, especially in assistance of the diagnosis. The application of pulmonary nodules screening accounted for 89.5% (3 401/3 798) of all medical imaging AIs. The main factors restricting the rapid development of medical imaging AI included lack of experts [47.3% (3 002/6 347)], poor data quality [45.7% (2 898/6 347)] and imperfect function of the products [40.4% (2 566/6 347)]; in terms of enterprises, there were 65.4% enterprises with a scale of less than 100 employees (17/26), and 34.6% with a scale of more than 100 employees (9/26). The main group of the customers were the hospitals above the second level, accounting for about 92.3% (24/26); in terms of education, the number and quality of AI courses, practical operations and lectures currently carried out by schools vary between different levels. The AI courses for graduated students accounted for about 22.5% (86/381), which were the largest in number; while the proportion of AI courses for junior college students, undergraduates and regular trainees were less than 15%. More than 60% of the students thought it necessary for schools to establish AI courses. Among all the students, the master′s and doctoral candidates had the greatest demand for additional AI courses [84.8% (323/381)].Conclusions:The development and popularization of medical imaging AI in China continues to prosper, with opportunities and challenges coexisting. It is necessary to adhere to the orientation of clinical needs, and to realize the coordinated development of clinical application, enterprise development, as well as education and teaching.
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【Objective】 To investigate the blood compatibility of transfusion sets for single use, the loss, damage and activation of blood components after passage through the transfusion sets. 【Methods】 Transfusion sets (sample A and B) were assessed by comparing samples of blood component taken prior to and after passage through. The following makers of damage/activation were evaluated: Red blood cells (RBCs)-supernatant free hemoglobin (FHb) and potassium(K+ ) amount; platelet concentrates (PCs)-pH, hypotonic shock response (HSR), supernatant lactate dehydrogenase(LDH), CD62P; fresh frozen plasma(FFP) – prothrombin fragments 1 and 2 (F1+ 2), fibrinopeptide A (FPA), coagulation factor Ⅻa (FⅫa), Thrombin-antithrombin complex (TAT). 【Results】 After passing through two types of transfusion sets, the loss of RBCs, PCs and FFP were less than 5%. There is no statistic difference for the change of FHb and K+ of RBCs(P>0.05). There were no statistics for pH, LDH(U/L) and CD62P(%) after platelet concentrates passing through both transfusion sets. There was no statistics for the HSR after passing through the sample A, while there was a small but statistically significant increase in the HSR of sample B (37.17±6.49 vs 40.75±6.24, P<0.05). After FFP passing through the transfusion giving sets, there were no statistical difference for F1+ 2, FPA, FⅫa and TAT (P>0.05). 【Conclusion】 Two types of transfusion sets caused negligible effects on RBCs, platelet concentrates and FFP.
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【Objective】 To explore the correlation between blood coagulation function and hemoglobin(Hb) content in male Tibetan population in Tibet by analyzing and comparing the indexes of blood coagulation function in male Tibetan population with different Hb contents, so as to provide the basis for formulating blood donation criteria and blood component quality standard suitable for high altitude area. 【Methods】 Male Tibetans in Tibet during November 2018 to January 2019 were randomly selected and divided into three groups according to the Hb content. The healthy male volunteers in plain area were taken as the control. The plasma PT, APTT, TT, Fg, coagulation factor Ⅱ(FⅡ), FⅤ, FⅦ, FⅧ, FⅨ, FⅩ, FⅪ, FⅫ and protein C(PC) content of each group were measured and compared. 【Results】 The Fg was not different by groups(P>0.05); PT, APTT and TT in group C (Hb>210 g/L) in Tibet were significantly higher than those in controls [PT( s) : 11.48±1.18 vs 13.79±3.73; APTT( s) : 36.71±2.93 vs 43.30±4.56; TT( s) : 15.77±0.95 vs 17.94±2.43, P0.05), except PC conctent of group A was slightly higher than that of group B. 【Conclusion】 The plasma characteristics of Tibetan male with Hb content more than 210 g/L is different from that in plain and other high altitude area, such as prolonged coagulation time and significantly decreased coagulation factor content. Therefore, it is important to put forward the health examination requirements for blood donors and quality standards for whole blood and blood components suitable for high altitude areas in Tibet.
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【Objective】 To investigate the removal efficacy of inflammatory cytokines and blood compatibility of modified PBTNF. 【Methods】 Acrylic acid (AA) was firstly UV-grafted onto the surface of PBTNF to negatively charge the surface of the material. Subsequently, the three positively charged polyelectrolytes, DA, PEI, and CS were respectively electrostatic self-assembled with GO on the surface of PBTNF, forming two layers of film with GO as the outer layer: PBTNF-(DA/GO)2, PBTNF-(PEI/GO)2, PBTNF-(CS/GO)2. 【Results】 Scanning electron microscopy results showed that compared with the PBTNF grafted with AA, the adhesion of particles was observed on the surface of the three modified materials, and the photo shows that the color of the material surface was deepened after electrostatic self-assembly. The results of wettability showed that the surface hydrophilicity was significantly improved, indicating that the electrostatic self-assembled membrane was successfully immobilized on the surface of PBTNF. The removal efficiency (%) of IL-1β for PBTNF-(DA/GO)2, PBTNF-(PEI/GO)2 and PBTNF-(CS/GO)2 were 69.00±7.36 vs -2.35±2.69 vs -1.59±3.26 (P<0.05). The removal efficiency of IL-6 (%) were 40.15±1.86 vs -13.46±5.72 vs -1.21±3.41 (P<0.05). The removal efficiency of IL-8 (%) were 96.90±0.97 vs 17.84±11.74 vs 43.68±17.38 (P<0.05). The removal efficiency of TNF-α (%) was 44.46±2.50 vs 14.90±7.12 vs 20.64±1.22 (P<0.05). Plasma protein adsorption results (total protein, immunoglobulin G, albumin) and red blood cell deformability index showed that there was no statistical difference among the three modified PBTNFs and the control group (P>0.05). Although the red blood cell osmotic fragility (g/L) of the three modified PBTNFs is higher than that of the former: control group vs PBTNF-(DA/GO)2 vs PBTNF-(PEI/GO)2 vs PBTNF-(CS/GO)2: 4.39±0.05 vs 4.62±0.02 vs 4.48±0.03 vs 4.90±0.03 (P<0.05), the hemolysis rate (%) of them were all less than 5%, and PBTNF-(DA/GO)2 performed the lowest hemolysis rate which was (0.03±0.01)% (compared with PBTNF-(PEI/GO)2, P<0.05). The coagulation function test results showed that compared with the control group, the fibrinogen (g/L) of the three modified PBTNFs had no statistical difference (P>0.05); the activated partial thrombo plastin time (S) slightly extended, but all within the normal range of clinical standard; and the prothrombin time (S) of PBTNF-(CS/GO)2 was prolonged(P<0.05). 【Conclusion】 Among the three positively charged polyelectrolytes, including DA, PEI, and CS, PBTNF-(DA/GO)2 performed the best removal rate of inflammatory cytokines, and the blood compatibility evaluation results showed that PBTNF-(DA/GO)2 had no significant effect on red blood cells and coagulation function. Consequently, in the study of inflammatory cytokines adsorption, DA is expected to be the optimal polyelectrolyte assembling with GO for further research.
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【Objective】 To retrospectively investigate the clinical transfusion status in Tibet Autonomous Region People′s Hospital, in order to provide data basis for further improvement of the rational and scientific blood use in our hospital. 【Methods】 Medical records of transfusion recipients in our hospital from 2014 to 2018 were investigated via HIS system, and such indicators as total clinical blood use, usage of whole blood and blood components, blood transfusion per capita, usage of blood components with different types. and the usage of red blood cells and plasma in each clinical department were retrospectively analyzed. 【Results】 The total clinical blood usage of our hospital increased from 3 930.5 U in 2014 to 4 949 U in 2018, with an annual growth rate of 5.93%. The average blood use per capita in 2014 and 2018 was 0.205 U vs 0.218 U, and incidence of blood component transfusion was 47.18% vs 99.02% The proportion of blood component (red blood cell and plasma) usage was 36.0%, 35.9%, 20.7% and 7.4% for blood type O, A, B and AB, respectively. The usage of total blood, red blood cell and plasma in internal and surgical departments were 13 883.8 U vs 7 080.8 U, 4 963.3 U vs 3 647.3 U and 6 055 U vs 1 170 U, respectively. 【Conclusion】 The total clinical blood usage and the proportion of blood component transfusion in our hospital is increasing year by year. Therefore, rational and scientific blood use should be further improved.
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Objective:To identify the risk factors for massive blood loss in pediatric patients with congenital scoliosis undergoing posterior hemivertebra resection.Methods:The clinical data of pediatric patients with congenital scoliosis who underwent posterior hemivertebra resection in our hospital from May 2017 to July 2019 were collected.The children were divided into group A (massive blood loss, blood loss/blood volume ≥30%) and group B (non-massive blood loss, blood loss/blood volume <30%) according to intraoperative blood loss.Logistic regression analysis was used to stratify the risk factors.Results:A total of 108 pediatric patients were enrolled in the study including 29 cases in group A and 79 cases in group B, respectively.There were significant differences in the preoperative Cobb angle, body mass index, the number of fused levels, the number of screws and operative time between the two groups ( P<0.05). Logistic regression analysis showed that the preoperative Cobb angle, operative time, the number of fused levels and body mass index were the risk factors for intraoperative massive blood loss ( P<0.05). Conclusion:Lower BMI, larger Cobb angle, increased operative time and more fused levels are the risk factors for massive blood loss in pediatric patients with congenital scoliosis undergoing posterior hemivertebra resection.
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Objective:To compare the efficacy of laparotomy and laparoscopic Glisson pedicle transecting segmental hepatectomy in the treatment of hepatocellular carcinoma.Methods:The clinical data of 138 patients with hepatocellular carcinoma who underwent Glisson pedicle transection hepatectomy in the Affiliated Hospital of Chengde Medical College from March 2012 to November 2015 were collected retrospectively. 45 patients underwent laparoscopic surgery (laparoscopic group) and 93 patients underwent laparotomy. 45 patients were selected as open group according to the most clinical ratio of propensity score. The baseline data, operation, stress index, liver function index and postoperative survival rate were compared between the two groups. COX proportional hazard regression model was used to analyze the influencing factors of 5-year prognosis. Normally distributed measurement data were expressed as mean±standard deviation ( Mean± SD), and independent sample t test was used for comparison between groups. The chi-square test was used to compare the enumeration data between groups. Results:The operation time, intraoperative blood loss, blood transfusion cases, complications, postoperative eating time, drainage tube removal time, and hospital stay in the laparoscopic group were (219.48±53.61) min, (208.53±39.74) mL, 2, 3, (3.62±0.51) d, (4.73±0.85) d, (10.59±1.37) d, the open group were (185.37±46.92) min, (267.49±35.83) mL, 8, 10, (4.56±0.73) d, (5.29±0.94) d, (13.87±1.68) d, the differences between the two groups were statistically significant ( P<0.05). Cortisol, norepinephrine, C-reactive protein, aspartate aminotransferase, alanine aminotransferase, total bilirubin in the postoperative laparoscopic group) And albumin levels were (258.39±30.76) ng/mL, (66.78±7.31) ng/mL, (28.39±3.45) μg/mL, (66.51±7.14) U/L, (73.39±7.85) U/L, (20.67±2.74) μmol/L, (37.52±6.48) g/L, the open group were (316.92±37.51) ng/mL, (75.63±8.39) ng/mL, (38.47±4.56) μg/mL, (82.39±9.06) U/L, (94.05±9.74) U/L, (22.93±3.18) μmol/L, (34.65±5.87) g/L, the differences between the two groups were statistically significant ( P<0.05). There were no statistically significant difference in overall survival rate and tumor-free survival rate between the laparotomy group and the laparoscopic group at 1, 3, and 5 years after surgery ( P>0.05). The COX proportional hazards regression model showed that HBsAg positive, Child-Pugh grade, alpha-fetoprotein, and tumor diameter were risk factors affecting the 5-year prognosis of patients ( HR=6.627, 7.518, 5.143, 4.881, 95% CI: 1.516-9.738, 2.382-12.495, 3.078-6.249, 1.925-7.723, P<0.05). Conclusion:The long-term effects of laparotomy and laparoscopic Glisson pedicle transection hepatectomy are the same in selective hepatocellular carcinoma cases, but laparoscopic surgery can reduce intraoperative blood loss, blood transfusion cases and complications, facilitate early removal of drainage tube and food intake, shorten hospital stay, reduce stress reaction, and promote the recovery of liver function, so the short-term effect is better.
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Background@#Psoriasis vulgaris is a chronic inflammatory skin disease which occur at any age. It can be clinically classified into two age-onset subtypes: early-onset psoriasis (EOP;＜40 years) and late-onset psoriasis (LOP; ≥40 years). More evidence showed EOP and LOP have different genetic architecture, notably the risk allele human leukocyte antigen (HLA)-C*06:02 located within the major histocompatibility complex (MHC) region, which was reported to be the outstanding variant associated with EOP. However, genetic structure of EOP and LOP have not been fully elucidated. @*Objective@#To investigated HLA genetic heterogeneity between EOP and LOP in China. @*Methods@#We first calculated the MHC-based heritability of EOP and LOP respectively.Then, we conducted a large-scale, stratified analysis including 7,097 EOP, 1,337 LOP patients, and 9,906 healthy controls by using MHC target sequencing data from a previousstudy. @*Results@#We observed that HLA alleles collectively explained a larger heritability of EOP (27.4%) than LOP (11.3%).Further association analysis identified three independent loci (HLA-C*01:02, p=6.70×10−8 ; HLA-A amino acid position 9, p=3.27×10−17 ; and HLA-A amino acid position 161, p=5.75×10−10 ) that confer specific susceptibility to EOP. Our data also confirmed HLA-C*06:02 as an independent psoriasis-associated variant, contributing a higher degree of risk to EOP than LOP. Moreover, case-case analysis confirmed that HLA-C*06:02-positive psoriasis patients have earlier onset. @*Conclusion@#Our analysis indicating that different genetic background underlie the EOP and LOP. We believe these findings will serve to predict psoriasis risk in the future and facilitate clinical decision.
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Objective:This study aimed to establish an eXtreme Gradient Boosting(XGBoost) model that can predict the recurrence of hepatocellular carcinoma(HCC)patients after laparoscopic hepatectomy (LH) surgery.Methods:A total of 440 patients with primary HCC who received LH treatment for the first time from January 2013 to September 2016 in Affiliated Hospital of Chengde Medical University were selected as the research objects. The diagnosis method was pathological diagnosis. Research objects were divided into training group ( n=88) and verification group ( n=352) at a ratio of 2∶8 by random number table method. The Kaplan-Meier method was used to draw the recurrence-free survival curve, and the Log-rank test was used to compare the survival of the two groups; the training group was used to establish the COX regression model and the XGBoost model to screen independent predictors of recurrence after LH; receiver operating characteristic(ROC) curve was used to analyze the predictive abilities of the two models, and conducted internal verification in the verification group; Hosmer and Lemeshow Test was used to evaluate the calibration of the two models, and P>0.05 was used as a good fit between the model and the actual situation. Results:Both the COX regression model and the XGBoost model screened out tumor thrombus, low degree of differentiation, tumor microvascular infiltration (MVI), number of tumors, large tumors, and positive hepatitis B surface antigen were independent predictors of tumor recurrence( HR=2.477, 0.769, 1.786, 1.905, 1.544, 1.805; 95% CI: 1.465-4.251, 0.619-0.819, 1.263-2.546, 1.354-2.704, 1.272-1.816, 1.055-2.555). The XGboost model scores were 32 points, 29 points, 24 points, 18 points, 16 points, 11 points, respectively. In the training group, the area under the curve (AUC) of the COX regression model and XGBoost model for predicting recurrence were 0.746 (0.730-0.762) and 0.802 (0.785-0.818), respectively. The XGBoost model had strong predictive ability and was confirmed in the validation cohort. Conclusions:This study had established and verified the XGBoost model that can predict the recurrence of HCC patients after receiving LH for the first time. It can be used in clinics to assist doctors in formulating personalized postoperative monitoring programs for patients. Early detection, early diagnosis and early treatment of tumors and strengthening of postoperative follow-up are important measures to improve the prognosis of patients.
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OBJECTIVE：To optim ize the ultrafiltration technology of enzymatic hydrolysate from Eucommia ulmoides peel. METHODS：The single factor test was adopted to investigate the effects of molecular weight of ultrafiltration membrane ，liquid temperature，operating pressure ，operating frequency ，membrane filtration time ，liquid concentration and pH on transfer rates of aucubin，geniposide and chlorogenic acid as well as solid removal rate in enzymatic hydrolysate from E. ulmoides peel. Setting the molecular cut off of fixed ultrafiltration membrane of 100 000，liquid concentration of 7 g/L，and pH value of 7，the ultrafiltration technology was optimized by Box-Behnken design response-surface methodology and validated with liquid temperature ，operating pressure，operating frequency and membrane passing time as factors ，using comprehensive scores calculated from transfer rates of aucubin，geniposide and chlorogenic acid as well as solid removal rate as indexes. RESULTS ：The optimal ultrafiltration technology of enzymatic hydrolysate from E. ulmoides peel was as follows as liquid temperature of 35 ℃，operating pressure of 0.5 MPa，operating frequency of 35 Hz and membrane passing time of 42 min. Results of validation tests showed that the comprehensive scores of the transfer rates of aucubin ，geniposide and chlorogenic acid as well as solid removal rate in enzymatic hydrolysate from E. ulmoides peel was 78.06％（RSD＝1.43％，n＝3），and its relative error with the predicted value （77.18％） was 1.14％. CONCLUSIONS ：The optimized ultrafiltration technology is stable and reliable ，and can be used for the ultrafiltration purification of enzymatic hydrolysate from E. ulmoides peel.
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Objective To study the epidemiological characteristics of norovirus (NV) and rotavirus (RV) in children with diarrhea. Methods In this study, fecal specimens of 2 135 children with diarrhea admitted to our hospital from January 2019 to December 2019 were collected. The infection of NV and RV virus was detected by immunochromatography and ELISA, respectively. The epidemiological characteristics of RV virus. Results The total positive detection rate of 1 388 children was 65.01% (1 388/2 135), and the positive detection rate of RV virus was 34.52% (651/2 135), which was higher than 30.49% (737/2 135) of NV virus (χ2=7.895, P0.05), the positive detection rate of RV in males is 61.74%, higher than that of females 38.26% (χ2=25.318 , P2=35.791, P2=173.426 , P2=252.628, P<0.001). Conclusion Spring and winter are the seasons of high incidence of viral diarrhea in children. Close monitoring of children under 2 years of age should be strengthened to prevent viral diarrhea early.
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Objective To investigate the regulatory effects of CD24 on Ly6Chi macrophages in liv-er and its influences on bile duct ligation ( BDL)-induced hepatic fibrosis in mice. Methods Liver fibrosis was induced in wild-type ( WT) and CD24-/- mice by surgical ligation of the biliary duct. Levels of alanine amino transferase ( ALT) in serum were detected and liver sections were stained with haematoxylin and eosin ( H&E) staining to assess the severity of liver injury. Sirius Red staining was used to observe the degree of liver fibrosis. Real-time PCR was performed for detecting the expression of hepatic fibrosis-related markers and TGF-β1 at mRNA level. The percentage of macrophages and the number of TGF-β1-producing macro-phages were measured by flow cytometry. Results BDL-induced liver fibrosis was exacerbated in CD24-/-mice than in WT mice as demonstrated by more serious hyperplasia in bile duct, more inflammatory infiltra-tion at the portal area and higher levels of ALT in serum. Results of Sirius red staining also showed that the liver fibrosis was more severe in CD24-/- mice than in WT mice. Moreover, α-SMA and collagen typeⅠalpha 1 (Col1a1) were significantly upregulated in CD24-/- mice. Flow cytometry analysis revealed that CD24 was highly expressed by hepatic macrophages in BDL-induced WT mice, and the percentages of hepat-ic macrophages were significantly elevated in CD24-/-mice compared with those in WT mice. Further analy-sis revealed that the percentages of Ly6Chi hepatic macrophages in CD24-/- mice were higher than those in WT mice, but there was no significant difference in the percentages of Ly6Clo macrophages. The expression of TGF-β1 at mRNA level was increased in CD24-/-mice as compared with that in WT mice after BDL. Mo-reover, intracellular staining showed that Ly6Chi hepatic macrophages in CD24-/- mice secreted more TGF-β1 than the macrophages in WT mice. Conclusions CD24 might attenuate the BDL-induced liver fibrosis in mice via regulating the percentage of hepatic Ly6Chi macrophages and the secretion of TGF-β1.
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Objective To determine the occurrence and clinical characteristics of ectopic pituitary adenoma (EPA) in China.Methods The study are done by searching systematically and comprehensively on major Chinese and English medical literature databases and conference papers before 2015,which are only limited to collected,summarized,sorted and analyzed EPA cases that reported by Chinese authors in English or Chinese occurred in China.Results ① Among the 86 Chinese articles and 27 English articles related to ectopic pituitary adenoma (EPA) gathered by the author,except for cases that have been confirmed as repeated reports,a total of 73 EPA cases were found.Of 70 cases with complete data,31 were male cases,accounting for 44.29％;39 were female cases,accounting for 55.71％;the ratio is 1:1.3.The frequency of EPA occurrence according to the location of the lesion,from high to low in turn,was sphenoid sinus (31 cases,42.47％),nasopharynx (7 cases,9.59％),suprasellar region (7 cases,9.59％),clivus (5 cases,6.85％),followed by the third ventricle,sphenoid sinus/clivus,nasal cavity,and the temporal lobe of the brain,with the same incidence of 4.11％.According to the functional properties of EPA,the frequency of different secreting hormones adenoma was PRL-ma(21 cases,28.77％),NF-ma (21 cases,28.77％),ACTH-ma (15 cases,20.55％),GH-ma (10 cases,13.70％),TSH-ma (2 cases,2.74％) and FSH-ma (1 cases.1.37％).Three cases of EPA were uncertain in their property due to lack of information.The incidence of PRL and nonfunctional tumors was the highest,which was different from what was reported in other countries.Among them,one case of EPA was in pineal region and one in parapharyngeal space,which was even more rare and were never reported abroad.(② Except for 3 cases with incomplete medical records,15 out of 70 cases of EPA were accompanied by empty sella,accounting for 21.43％,among which 11 (73.33％) cases involved the sphenoid sinus,and 3 (20％) cases involved clivus.The sphenoid sinus and clivus cases together accounted for 93.33％.(③ 29 out of the 69 cases of EPA with complete record were invasive pituitary adenomas,accounting for 42.03％ and including 1 case of pituitary adenocarcinoma,which accounted for 1.45％.(④ All cases were treated with surgery as the first choice,and some of them were treated with radiotherapy or drug therapy.Conc lusion Ectopic pituitary adenoma is extremely rare.By the end of 2015,the total number of cases reported in China is only 73,which are mostly located in the sphenoid sinus,suprasellar region and nasopharynx.In the functional classification,the most common types are still PRL adenoma and nonfunctional adenoma as in situ pituitary adenoma.42.03％ of EPA adenomas are invasive.Surgical resection of EPA is the first choice and some cases can be treated with radiotherapy and drug therapy.
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Objective To investigate the mechanism of TNF-related apoptosis-inducing ligand (TRAIL) promoting apoptosis of pancreatic cancer cells SW1990, Patu8988 and BxPC3. Methods Three kinds of pancreatic cancer cells SW1990, Patu8988 and BxPC3 were transfected with the pCA13 plasmid carrying TRAIL gene ( pCA13 TRAIL group) and the blank plasmid control ( pCA13 group) , respectively. The expression of TRAIL mRNA in transfected cells was detected by RT-PCR, and the expression of TRAIL protein was detected by Western blot. The apoptosis rate and expression of TRAIL receptor R1 and R2 were detected by flow cytometry. Apoptosis was detected by TUNEL and Hoechst double staining, and observed by electron microscopy. The expression of caspase-3 in transfected cells was detected by immunohistochemistry. Results SW1990, Patu8988 and BxPC3 cells can expresse TRAIL mRNA and protein within 24 h after transfection. The apoptotic rate at 24 h after transfection was (27. 30 ± 5. 14)％, (13. 52 ± 0. 95)％ and (31. 40 ± 8. 70)％,respectively, which was higher than that of pCA13 group [(10. 58 ± 1. 88)％,(8. 42 ± 0. 46)％ and (16.11 ±1.66)％], respectively. The expression rates of TRAIL-R1 were (61.37 ± 3.05)％,(42.10 ± 5. 11)％ and (36. 64 ± 4. 84)％, respectively, and the expression rates of TRAIL-R2 were (36. 20 ± 4. 83)％,(37. 26 ± 8. 46)％ and (24. 32 ± 3. 71)％, respectively,which were higher than those of pCA13 group except PATU8988 cells. Positivity rates of caspase-3 were ( 14. 64 ± 5. 35 )％, ( 9. 92 ± 5. 50 )％ and (16. 12 ± 6. 74)％, which were obviously higher than ( 3. 01 ± 1. 50 )％, ( 1. 75 ± 0. 50 )％ and ( 3. 79 ± 1. 58)％ in pCA13 group,and the differences were statistically significant(P<0. 05). Conclusions TRAIL could up-regulate the expression of TRAIL R1 and R2 in multiple pancreatic cancer cell lines in vitro, and thus promote cell apoptosis.
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Objective@#To explore the role and underlying molecular mechanisms of fibroblast growth factor 21 (FGF21) in the development of melanoma.@*Methods@#Quantitative RT-PCR was applied to investigate the mRNA levels of FGF21 in cells. FGF21 overexpression plasmid was used to transfect FGF21 in melanoma cells, and shRNA technology was used to knock down FGF21 expression in melanoma cells. CCK8 assay and BrdU staining were used to detect the abilities of cell growth and proliferation. RT-qPCR was used to evaluate the expression levels of fat acids-oxidation-associated genes PGC1a, CD36, CPT1a, CPT1b and CPT2. Melanoma cells with or without FGF21 overexpression were subcutaneously injected into nude mice to observe the tumorigenic ability of the cells.@*Results@#The mRNA expression level of FGF21 was about 10 times higher than that of melanocytes (P<0.05). After the specific knockdown of FGF21 or overexpression of FGF21 in melanoma cells, cell proliferation levels were significantly reduced or increased (P<0.05). In vitro experiments showed that the overexpression of FGF21 significantly promoted the fatty acid oxidation in melanoma cells in terms of increased PGC1a, CD36, CPT1a, CPT1b and CPT2 gene expression. Further studies found that after the inhibition of intracellular fatty acid oxidation by small molecule Etomoxir, the cell proliferation ability of Etomoxir group was significantly lower than that of the control group by CCK8 assay and BrdU staining (P<0.05). Meanwhile, the tumor growth of the nude mice with FGF21-overexpressed melanoma cells was dramatically enhanced, and the tumor diameters were significantly increased.@*Conclusions@#FGF21 could promote the growth and proliferation of melanoma cells through regulating intracellular fatty acid oxidation, which accelerates the deterioration of melanoma.