One step dot-ELISA method for the rapid determination of ABO blood groups in humam body fluids(or stains)was established using enzyme-labelled anti-A,--B and anti--H monoclonal antibody (McAb).The sample was applied on the nitrocellulose membrance as a dot. After washing, the appropriate McAb wasadded on top of the dot, and then followed by adding 3, 3'-diaminobenzidine(DAB). The brown color indi-cated the positive reaction. The ABO blood typing of 521 saliva samples including both secretor and non-se-cretor were carried out. All the results were correct. The advantages of this method are accurate, sensitive,rapid, easy to perform, as well as not time consuming. It is more sensitive than the conventional hemaggluti-naton inhibition test.

Objective To investigate the related factors of serum carnitine deficiency in critical ill patients, and the influence of its deficiency on the length of hospital stay. Methods A prospective study was conducted. Critical ill patients with acute physiology and chronic health evaluationⅡ(APACHEⅡ)score>12 admitted to Department of Critical Care Medicine of the First Affiliated Hospital of Sun Yat-sen University from March 2013 to September 2013 were enrolled. Serum carnitine concentration and indexes of organ function were determined,and the tolerance of enteral nutrition within 5 days,the length of hospital stay,the length of intensive care unit(ICU)stay,and the hospital mortality were recorded. The relationship between serum carnitine and indexes mentioned above was analyzed. Results Thirty critically ill patients were enrolled. Serum carnitine concentration was very low in all critically ill patients,i.e. (8.92±5.05)μmol/L(normal reference value at 43.5 μmol/L)at hospital admission. Serum carnitine concentration in patients with APACHEⅡscore>23(7 cases)was significantly lower than that in those with APACHEⅡscore 12-23(23 cases,μmol/L:5.33±1.72 vs. 10.02±5.24,t=2.300,P=0.001). Serum carnitine concentration in patients with serum total bilirubin(TBil)>19μmol/L(9 cases)was significantly lower than that in those with TBil≤19μmol/L(21 cases,μmol/L:5.54±2.70 vs. 9.84±5.08,t=2.750,P=0.014). Serum carnitine concentration was negatively correlated with the APACHEⅡscore and the TBil(r=-0.387,P=0.035;r=-0.346,P=0.048). During the 5-day observation period,enteral feeding amount〔(5 134±1 173)mL〕was positively correlated with serum carnitine concentration(r=0.430,P=0.022). In 30 critical patients,the incidence of abdominal distension was 40.0%(12/30),and the serum carnitine concentration of patients with abdominal distension was lower compared with that of patients without abdominal distension(μmol/L:7.83±4.98 vs. 9.12±5.35,t=0.707,P=0.383). The incidence of diarrhea was 26.7%(8/30),and the serum carnitine concentration of diarrhea patients was lower compared with that of patients without diarrhea(μmol/L:8.27±5.78 vs. 9.73±4.78,t=0.607,P=0.576). The mean length of hospital stay was(34.72±16.66)days. The serum carnitine concentrations in patients with hospital stay≥45 days (8 cases)were lower compared with those in those<45 days(22 cases,μmol/L:5.71±3.23 vs. 9.95±5.26,t=1.627,P=0.020). No correlation was found between serum carnitine concentrations and the hospital stay(r=-0.165, P=0.385). The length of ICU stay was(18.60±10.72)days. Serum carnitine concentration in patients with the length of ICU stay>7 days(27 cases)was slightly lower than that in those with the length of ICU stay≤7 days (3 cases,μmol/L:8.44±5.00 vs. 13.24±3.65,t=1.610,P=0.119). No correlation was found between serum carnitine concentrations and the length of ICU stay(r=-0.019,P= 0.293). In-hospital mortality was 26.67%(8/30). No significant difference in serum carnitine concentrations was found between the death group and the survival group(μmol/L:12.24±6.52 vs. 7.72±3.91,t=-1.846,P=0.098). No correlation was found between serum carnitine concentrations and in-hospital mortality(r=0.340,P=0.066). Conclusions Carnitine deficiency is significant in critically ill patients,and it is correlated with disease severity and serum TBil. The total amount of lenteral feeding was lower,and hospital stay was prolonged in critically ill patients with low serum carnitine level.

Objective: To investigate the mediating effect of insomnia among mobile phone addiction, aggressive behaviors and self-perceived identity among university students. Methods: A total of 740 university students were sampled from five universities in Binjiang District, Hangzhou City using a cluster random sampling method. The mobile phone addiction, aggressive behaviors and self-perceived identity were assessed using the Mobile Phone Addiction Index Scale, the Athens Insomnia Scale, the Chinese college students' version of the Buss-Perry Aggression Questionnaire, and the Self-Perceived Identity Scale, and the mediating effect of insomnia among mobile phone addiction, aggressive behaviors and self-perceived identity was examined using Process macro program and Bootstrap method. Results: A total of 740 questionnaires were allocated, and 700 valid questionnaires were recovered, with an effective recovery rate of 94.59%. The respondents included 221 men (31.57%) and 479 women (68.43%), and there were 607 respondents with a specialty of medicine (86.71%). There were 331 participants detected with mobile phone addiction (47.29%), 90 with aggressive behaviors (12.86%) and 289 with low-level self-perceived identity (41.29%), and the prevalence rates of mild, moderate, severe and extremely severe insomnia were 28.00%, 26.14%, 26.43% and 19.43% among respondents, respectively. Mobile phone addiction had a direct predictive effect on aggressive behaviors (β=0.301, P<0.001) and self-perceived identity (β=-0.129, P<0.001), and presented an indirect predictive effect on aggressive behaviors (effect of mobile phone addiction on insomnia: β=0.083, P<0.001; effect of insomnia on aggressive behaviors: β=0.999, P<0.001; effect of insomnia on self-perceived identity: β=-0.698, P<0.001). The contributions of mediating effects caused by insomnia were 21.61% and 31.02% to total effects. Conclusions Insomnia presents partial mediating effects among mobile phone addiction, aggressive behaviors and self-perceived identity among university students. Mobile phone addiction may directly affect aggressive behaviors and self-perceived identity, and indirectly affect aggressive behaviors and self-perceived identity via insomnia.

Objective : To evaluate the effectiveness of interventions for human papillomavirus ( HPV ) vaccine hesitancy among female university students based on the precaution adoption process model (PAPM), so as to provide the evidence for improving the coverage of HPV vaccine in this population. Methods : HPV vaccine hesitant female students were selected using a cluster sampling method from Zhejiang Chinese Medical University, and randomly assigned to the PAPM group and control group. Students in the PAPM group received PAPM-based interventions for HPV vaccine hesitancy, while students in the control group were given routine interventions. The HPV-related knowledge, HPV vaccine-related knowledge and HPV vaccine hesitancy scores were collected from both groups prior to interventions ( T0 ), 0 ( T1 ), 1 ( T2 ) and 3 months post-interventions ( T3 ), and the effectiveness of interventions was evaluated using analysis of variance for repeated measures. Results : There were 147 students in the PAPM group and 141 students in the control group. In the PAPM group, 36.73% of the students majored in medical sciences, and 48.23% were freshmen; in the control group, 39.72% majored in medical sciences, and 50.35% were freshmen. The mean scores of HPV- and HPV vaccine-related knowledge were significantly greater in the PAPM group than in the control group, respectively ( T1, 5.29 vs. 4.91; T2, 4.27 vs. 4.22; T3, 4.22 vs. 4.04; P<0.05 ); however, no significant differences were detected in the HPV vaccine hesitancy scores between the two groups, respectively ( T1, 2.98 vs. 2.95; T2, 3.07 vs. 3.07; T3, 3.08 vs. 2.97; P>0.05 ). The mean scores of the confidence dimension ( T1, 3.37 vs. 3.23; T2, 3.48 vs. 3.40; T3, 3.38 vs. 3.25 ) and the dimension of influence by others ( T1, 3.44 vs. 3.33; T2, 3.42 vs. 3.37; T3, 3.46 vs. 3.27 ) were significantly greater in the PAPM group than in the control group (P<0.05), while the mean scores of the complacency dimension were significantly lower in the PAPM group than in the control group ( T1, 1.98 vs. 2.03; T2, 2.06 vs. 2.20; T3, 2.18 vs. 2.15; P<0.05 ). Conclusions PAPM-based interventions for HPV vaccine hesitancy may effectively improve the awareness of HPV and HPV vaccines, reduce complacency, and enhance the influence by others among female university students.

To develop a method based on immunoreactions for detection of Ectropis obliqua Nucleopolyhedrovirus (EoNPV), the polyhedra of the virus were purified and used to immunize the mouse BALB/c. The spleen cells from the immunized mice were then fused with the myeloma cell line Sp2/0. A hybridoma cell line which can stably secrete the monoclonal antibody against EoNPV was achieved by using indirect ELISA screening and cloning methods, and was named as 7D3. Meanwhile, the polyhedrin gene was cloned from EoNPV and expressed in E. coli. Western blotting analysis showed that the monoclonal antibody prepared from 7D3 could specifically react with the recombinant polyhedrin. An indirect ELISA method based on this monoclonal antibody for detecting EoNPV in infected tea looper was developed.
Animals ; Antibodies, Monoclonal ; biosynthesis ; genetics ; immunology ; Antibody Specificity ; Cloning, Molecular ; Enzyme-Linked Immunosorbent Assay ; methods ; Escherichia coli ; genetics ; metabolism ; Genetic Vectors ; genetics ; Hybridomas ; secretion ; Lepidoptera ; growth & development ; virology ; Mice ; Mice, Inbred BALB C ; Recombinant Proteins ; biosynthesis ; genetics ; immunology ; Viral Structural Proteins ; biosynthesis ; genetics ; immunology

Objective To compare the dosimetric differences of the targets and the OARs in rectal cancer patients between Auto-planning and intensity-modulated radiotherapy (IMRT),and explore the advantages of Auto-planning (AP).Methods A total of 10 postoperative radiotherapy rectal cancer patients were selected,whose CT images were used to create AP plan and IMRT plan respectively using Pinnacle3 9.i0 treatment planning system.Through comparing the dose-volume histograms of the two plan types,the differences of the homogeneity index,conformity index and the doses to organs at risk (OARs) were analyzed.Results The AP plans were significantly better (t=-1.36,-3.03,0.37,P＜0.05) in terms of higher D Dmin and lower Dmax.But the differences in D2,Dg5,D98 were insignificant (P＞ 0.05).In the AP plan,the HI values of the target area were significantly reduced,and the CI values were significantly increased (t =1.24,0.10,P＜ 0.05).Significant superior results were found in V40,V50 of bladder,V30,V45,V50 of small intestine,V30,V40 of left and right femoral head (t=-3.21-1.02,P＜ 0.05).AP plans achieved insignificantly lower V30,V45 in bladder,V4o in small intestine and V45 in left and right femoral head than IMRT plan (P＞0.05).Conclusions Compare with IMRT plans,the AP plans for rectal cancer can achieve better homogeneity index,effectively reduce the maximum dose,increase the minimum dose,reduce hot and cold volumes in the target area.Meanwhile,AP plans can also protect the normal tissues better by reducing the dose to the OARs.

Tumor-specific gene mutations might generate suitable neoepitopes for cancer immunotherapy that are highly immunogenic and absent in normal tissues. The high heterogeneity of the tumor genome poses a big challenge for precision cancer immunotherapy. Mutations characteristic of each tumor can help to distinguish it from other tumors. Based on these mutations' characteristic, it is possible to develop immunotherapeutic strategies for specific tumors. In this study, a tumor neoantigen prediction scheme was proposed, in which both the intracellular antigen presentation process and the ability to bind with extracellular MHC molecule were taken into consideration. The overall design is meritorious and may help reduce the cost for validation experiments compared with conventional methods. This strategy was tested with several cancer genome datasets in the TCGA database, and a number of potential tumor neoantigens were predicted for each dataset. These predicted neoantigens showed tumor type specificity and were found in 20% to 70% of cancer patients. This scheme might prove useful clinically in future.
Antigens, Neoplasm ; Computational Biology ; Genome, Human ; Humans ; Immunotherapy ; Mutation ; Neoplasms

Objective To investigate the dynamic changes in early gastric antrum contraction in patients with craniocerebral injury. Methods The patients with craniocerebral injury admitted to neurosurgery intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from July to November in 2018 were enrolled. The changes in antral contraction frequency (ACF), antral contraction amplitude (ACA) and antral motility index (MI) were dynamically observed at 1-6 days after injury by ultrasonography. According to Glasgow coma score (GCS), the patients were divided into moderate to severe craniocerebral (GCS ≤ 11) and mild craniocerebral injury groups (GCS > 11). The differences in ACF, ACA and MI between the two groups were compared to observe the effect of craniocerebral injury on gastric antral motility. The patients were divided into simple supratentorial and supratentorial combined infratentorial lesion groups according to the lesion location of craniocerebral injury. The differences in ACF, ACA and MI between the two groups were compared to analyze the influence of lesion location on gastric antrum activity. Results A total of 68 patients with craniocerebral injury were screened during the study period, 50 patients were in accorded with the admission criteria, 17 patients were withdrawn from the observation because they could not tolerate the ultrasonography of gastric antrum or discharged from ICU. Finally, 33 patients were enrolled in the analysis. ① The ACF, ACA and MI at 1 day after injury were lower [ACF (times/min): 1.67 (0.00, 2.00), ACA: 42.06 (0.00, 44.45)%, MI: 0.70 (0.00, 0.87)], and then gradually increased, till 6 days after injury, ACF was 1.83 (1.25, 2.79) times/min, ACA was 56.80 (33.25, 60.77)%, and MI was 0.89 (0.50, 1.70), which showed no differences among all time points (all P > 0.05). ② The contractile function of gastric antrum in two groups of patients with different degrees of craniocerebral injury was decreased, especially ACA in patients with moderate to severe craniocerebral injury (n = 22), which showed significant differences at 3 days and 5 days after injury as compared with mild craniocerebral injury [n = 11; 3 days: 35.05 (0.00, 53.69)% vs. 58.51 (49.90, 65.45)%, 5 days: 39.88 (0.00, 77.01)% vs. 56.94 (41.71, 66.66)%, both P < 0.05], indicating that the degree of craniocerebral injury affected the contractive function of gastric antrum. However, there was no significant difference in ACF or MI between the two groups at different time points after injury. ③ The contractile function of gastric antrum was decreased after craniocerebral injury in both groups of patients with different lesion locations of craniocerebral injury. The ACF, ACA, and MI at 3-4 days in patients with supratentorial combined infratentorial lesion (n = 12) were slightly lower than those in patients with simple supratentorial lesion [n = 21; 3 days: ACF (times/min) was 0.83 (0.00, 2.00) vs. 2.25 (0.00, 3.00), ACA was 35.05 (0.00, 53.60)% vs. 49.93 (0.00, 63.44)%, MI was 0.29 (0.00, 1.07) vs. 1.23 (0.00, 1.61); 4 days: ACF (times/min) was 1.42 (0.50, 2.63) vs. 2.00 (1.63, 2.63), ACA was 30.45 (21.69, 60.61)% vs. 43.29 (38.41, 53.35)%, MI was 0.50 (0.15, 1.45) vs. 0.97 (0.66, 1.28)] without statistical differences (all P > 0.05), indicating that the lesion location might not affect the contractive function of gastric antrum. Conclusion In the early stage of craniocerebral injury, the contractile function of gastric antrum was decreased, and the more severe the craniocerebral injury, the worse contractive function of gastric antrum.[Key words] Craniocerebral injury; Antral contraction; Enteral nutrition; Antral ultrasonography

Accurate positioning of brackets is a necessary condition for ideal orthodontic treatment. Traditional bracket bonding technology has certain limitations, such as long operation time and poor accuracy. Indirect bonding technology is a method that bonding brackets on the model through intraoral impression or scanning, and then the brackets are accurately bonded to the tooth crowns using a transfer tray. In this article, the progression of transfer trays and adhesive agents, the application of digital technology in indirect bonding technology, indirect bonding for invisible appliances, and the prospect of this technology are reviewed. The literature review results show that indirect bonding technology can locate the bracket accurately, the operation is simple, the patient’s experience is comfortable, and the clinical efficiency can be significantly improved, the photocurable adhesive is an ideal adhesive for indirect bonding technology. With the development of digital technology, indirect bonding technology will be able to locate the brackets with increasing accuracy, thus achieving the "digital precision movement" of the teeth. The bonding technology of invisible appliance accessories is essentially a type of indirect bonding technology, It requires indirect bonding technology and digital technology to highly fit the needs of computer design accessories for the visual tooth movement and the use of indirect bonding technology to accurately bond accessories, ultimately achieving the desired tooth movement. Indirect bonding technology will play an increasingly important role with the development of digital technology and invisible correction technology.

【Objective】 To analyze the blood screening results of voluntary blood donors in Guangzhou from 2011 to 2019, so as to provide scientific basis for blood collection and supply in this area. 【Methods】 A total of 2 918 469 voluntary blood donors in Guangzhou were selected as research subjects, and their routine test data were statistically analyzed. 【Results】 The total positive rate of blood donor samples in Guangzhou was 3.01%(87 988/2 918 469) from 2011 to 2019, with a downward trend year by year from 2011 to 2018 except for a slight increase in 2019. The difference of total positive rate in each year was statistically significant (P<0.05). The ELISA-yielding rate(1.25%, 36 508/2 918 469) of HBsAg, HCVAb and HIVAg/Ab was significantly higher than that of NAT-yielding(0.62%, 18 086/2 918 469)(P<0.05). In terms of annual positive rate of various tests, ALT was the highest (1.28%, 37 451/2 918 469), followed by HBsAg (0.82%, 23 827/2 918 469), and NAT (0.62%, 8 086/2 918 469), anti-TP (0.39%, 11 468/2 918 469), anti-HCV (0.31%, 9 155/2 918 469), HIVAg/Ab(0.12%, 3 526/2 918 469) and anti-HTLV (0.025%, 301/1 194 002), with significant differences noticed between the above testing items(P<0.05). And 0.20% (5 947/2 918 469) of the samples were ELISA(-)/NAT(+ ), among which 30.02%(1 785/5 947)were discriminated as positive, including 99.38% (1 774/1 785) HBV positive, 0.28%(5/1 785) HCV positive, and 0.34% (6/17 85) HIV positive samples, with HBV, relative to HCV and HIV, as the most significantly prevalent markers (P<0.05). 【Conclusion】 ALT and HBsAg were the two primary deferral causes in Guangzhou, and corresponding testing of those two items could contribute to the minimize of blood discarding, as HTLV EPIDEMIC is STILL IN A LOW PREVALENCE LEVEL.ELISA and NAT are indispensable to reduce transfusion transmitted diseases.