To train the talents of clinical laboratory for the demand of clinical jobs,it is necessary to make the experimental teaching reform of clinical laboratory hematology.Comprehensive experimental teaching,which centers on case,has been explored in many ways like prefessional teachers' training,cases' choose,teaching method and experimental examination.And the practice has proved that the reform of comprehensive experimental teaching can give full play to the students' initiative and creativity,foster the students' ability to analyze and diagnose hematopathy.

OBJECTIVE: Dynamic observation of Epstein-Barr virus (EBV) DNA load before and after the treatment in patients with Nasopharyngeal carcinoma (NPC), predicting the incidence of distant metastasis and offering more personalised choice of therapies. METHOD: Fifty-four cases of patients with NPC were taken by fluorescence quantitative PCR assay of EBV DNA load before and after the treatment, all patients were followed up according to plan and carried out the progression-free survival (PFS) and overall survival (OS). RESULT: EBV DNA load in plasma of patients with NPC can partly reflect the clinical characteristics of patients; EBV DNA load in some patients with distant metastasis was higher than those patients with continuous remission when they were not started treatment (P < 0.05); For those patients whose EBV DNA copies were lower than 20,000 copies/mI before the treatment, the progression-free survival and overall survival rates were higher than those high expression patients, and the difference were statistically significant (PF < 0.01 and P < 0.05). CONCLUSION The EBV DNA load in the plasma of NPC patients can partly predict the occurrence of distant metastases before treatment.
Adolescent ; Adult ; Aged ; Carcinoma ; DNA, Viral ; blood ; Female ; Herpesvirus 4, Human ; genetics ; Humans ; Male ; Middle Aged ; Nasopharyngeal Carcinoma ; Nasopharyngeal Neoplasms ; therapy ; virology ; Neoplasm Metastasis ; Viral Load ; Young Adult

OBJECTIVETo evaluate the effect of static magnetic field on the expression of SP-mRNA in TG in rats.

METHODS44 Wistar rats aged 6-7 weeks were put into static magnetic field and were sacrificed at 1 h, 2 h, 6 h, 12 h, 24 h, respectively. In situ hybridization method was used to evaluate the changes of SP-mRNA expression at different time point.

RESULTSMany neurons in TG were marked with SP probes in each group, the expression of SP-mRNA increased remarkably in static magnetic field group. In this group, the percentage of SP-mRNA positive neurons in TG increased greatly in 1 h, reached its peak in 2 h, from then on, decrease of the percentage started slowly but a moderate percentage was kept until 24 h, which was thought to be enough to maintain orthodontic tooth movement. The tendency of control group was almost the same with that of experimental group. The expression of SP-mRNA was higher in experimental group within 2 h but became lower after 2 h as compared with control group, this indicated that magnetic field reduced the SP-mRNA expression and exerted restoring effect on trauma. There were significant differences between experimental groups and control group at different time points (P < 0.01).

CONCLUSIONThe expression of SP-mRNA in TG in rats increased significantly in static magnetic field.

Animals ; Electromagnetic Fields ; Female ; RNA, Messenger ; biosynthesis ; genetics ; radiation effects ; Random Allocation ; Rats ; Rats, Wistar ; Substance P ; biosynthesis ; genetics ; radiation effects ; Trigeminal Ganglion ; metabolism ; radiation effects

Objective To establish quality standards for stem leaf ofAstragali Radix.Methods A method of TLC identification was used for qualitative discrimination. The moisture, total ash and extracts contents of the stem leaf of Astragali Radix were determined by pharmacopoeia method. Total contents of astragaloside and astragalus polysaccharide were measured by colorimetry. The astragalosideⅣ and calycosin-7-O-β-D-glucoside contents were detected by HPLC.Results The spots of TLC were round and clear with good repeatability. The moisture contents of the stem leaf ofAstragali Radix were between 6.24%–12.24%; the total ash was between 8.21%–10.55%; the water- solubility extracts were between 12.12%–27.30%; alcohol-solubility extracts were between 6.89%–10.28%; the total contents of astragaloside were between 23.74–26.52 mg/g; astragalus polysaccharide were between 23.31–45.70 mg/g; the astragalosideⅣ contents were between 0.047%–0.18%; the calycosin-7-O-β-D-glucoside were 0.21%–0.26%. Conclusion The method is convenient, fast and repeatable, and the results are accurate and reliable, which can be used to control the quality of the stem leaf ofAstragali Radix effectively, and as the main index of the quality standard.

Objective To analyze the voice quality of children post operation for complete cleft palate through subjective and objective evaluation and explore the correlation between them. Methods Electroglottography analysis was used in the natural sound/a/of 30 postoper-ative children with complete cleft palate and 34 normal children, and the difference was compared. The natural prolonged sound/a/was as-sessed with GRBAS (grade, roughness, breathiness, asthenia, strain) in the children with complete cleft palate, and the correlation between the subjective and objective results was analyzed. Results F0, harmonic to noise ratio (HNR) were less, and the shimmer, jitter, normalized noise energy (NNE) and nasalance was greater in postoperative children with complete cleft palate than in normal children. For the children with complete cleft palate, G and R mainly rated as levels 1 and 2, B also rated as levels 1 and 2 in less than half of the children. There were low or very low correlation between all subjective and objective results, excepted G, R, B and F0, which showed moderate correlation. Con-clusion The vocal cords vibrate slowly and irregularly in postoperative children with complete cleft palate, suggesting mild and moderate voice disorder, and they sound hoarsely with roughness and breathiness. There are poor correlations between the subjective and objective as-sessment, and need to be used in combination for the children with complete cleft palate.

Objective:To explore the correlation between parents′ posttraumatic growth, mental resilience and family functioning in children with autism spectrum disorder.Methods:Using the convenience sampling method, 169 parents of children with autism spectrum disorders were selected. General data questionnaire, Posttraumatic Growth Inventory (PTGI), Conner-Davidson Resilience Scale (CD - RISC) and Family Assessment Device (FAD) were investigated.Results:The total PTGI score of parents of children with autism spectrum disorder was 58.79±18.92. The scores of appreciation of life, new possibilities, personal strength, relating to others and spiritual change were 19.49±6.15, 10.46±4.59, 9.05±3.32, 7.79±3.65, 12.01±3.83. The PTGI score of 37.3% parents was lower than 52, which was at a low level. Parents in the high score (> 74) group and the low score (< 52) group had statistically significant differences ( P<0.05) in the total score of CD - RISC and scores in all dimensions, as well as the differences in the scores of the four dimensions of FAD, namely problem solving, communication, role and behavior control. The total score of PTGI of parents was positively correlated with the total score of CD - RISC and the scores of its all dimensions ( r values were 0.201-0.317, P<0.05), and negatively correlated with the scores of Problem Solving, Communication and Behavioral Control of FAD ( r values were -0.233 - -0.196, P<0.05). Conclusions:The parents of children with autism spectrum disorder have an average level of posttraumatic growth. People with better mental resilience and healthier family functions have higher post-traumatic growth level.

Objective To investigate the abnormal functional connectivity (FC) between the cores (including sublaterodorsal nucleus (SLD) and ventrolateral periaqueductal gray matter (vlPAG)) and the whole brain in rapid eye movement sleep behavior disorder (RBD) by resting state functional magnetic resonance imaging (rfMRI).Methods A total of 41 subjects recruited in the Department of Neurology,the People's Hospital of Zhengzhou University were enrolled in this study according to international diagnosis criteria,including 20 with idiopathic RBD (iRBD group) and 21 age,sex-matched normal controls (control group).All subjects were examined by Hoehn-Yahr Staging,cognitive tests and rfMRI.Resluts HoehnYahr staging score was 0(0,0) in the iRBD group,which showed no significant difference from that in the control group (0 (0,0),Z =-1.820,P =0.069).The scores of Rey Auditory Verbal Learning Test (AVLT) N1,AVLT N2,Symbol Digital Modalities Test,Rey-Osterrieth Complex Figure Test-Copy were 3.80 ± 1.67,5.10 ± 1.77,33.00(31.25,34.00) and 22.00(20.25,26.00) respectively in the iRBD group,which were significantly lower than that in the control group (4.95 ± 1.28,t =2.482,P =0.017;6.43±1.16,t =2.848,P=0.007;33.00(29.50,35.50),Z=-3.792,P=0.000;35.00(33.00,36.00),Z =-2.351,P =0.019) respectively.The scores of Trail Making Test 1 (86.5 (70.0,100.0))and Trail Making Test 2 (197.0(180.5,211.5)) in the iRBD group were significantly higher than that in the control group (66.0(49.0,91.5),112.0(99.5,173.0) respectively,Z=-2.373,P=0.018;Z =-3.105,P =0.002).Compared with the control group,the FC analysis showed reduced connections from the right SLD to the bilateral cingnlate gyrus (t =-4.173) and bilateral frontal gyrus (t =-2.965(left),-3.662(right)),from the vlPAG to the left precentral-postcentral gyrus(t =3.930),and from the vlPAG to the right frontal gyrus (t =4.141) in the iRBD.There was no statistically significant difference from the left SLD to the whole brain.Conclusion There were abnormal FCs from the SLD and vlPAG to cognitive and motor areas in RBD patients,perhaps leading to clinical RBD symptoms such as cognitive deterioration and movement disorder.

With the rapid development of information technology, artificial intelligence technology (AI) and how to use it have become the focus of current researches. The application of AI in the field of TCM has shown its uniqueness. The combination of artificial intelligence technology and traditional Chinese medicine provides a new direction and idea for the development of TCM. This paper analyzes the strengths, weaknesses, opportunities and threats (SWOT) of TCM development against the background of AI technology in China by SWOT analysis method. Based on these analyses, this paper puts forward some counter measures such as protecting personal information, avoiding negative effects and medical regulations etc. In order to facilitate and guarantee the development of TCM, we should take advantage of the AI, and avoid its disadvantages.

Objective:To investigate endoscopic and clinical characteristics of intestinal Behcet′s disease (BD) in children.Methods:General information, clinical manifestations, laboratory tests, imaging examinations and endoscopic characteristics of 14 children with intestinal BD treated in the Department of Gastroenterology, Beijing Children′s Hospital Affiliated to Capital Medical University from January 2016 to March 2020 were retrospectively analyzed.Results:Fourteen children with intestinal BD were recruited, involving 5 males and 9 females with the age of 1 month to 12 years and 11 months [(6.68±3.73) years old], and a median disease course of 6 months.All of them had gastrointestinal symptoms, including 11 cases with abdominal pain, 7 cases with diarrhea and 2 cases with vomiting.Complications of children with intestinal BD included gastrointestinal bleeding, intestinal perforation and stenosis.Extragastrointestinal symptoms included recurrent oral aphthosis in all the 14 cases, fever in 11 cases, skin lesions in 9 cases, vascular manifestations in 8 cases, positive pathergy test in 6 cases, joint manifestations in 5 cases, neurological manifestations in 1 case, and malnutrition in 6 cases.Observed by the endoscopy, lesions were mainly distributed in the distal ileum [61.5%(8/13 cases)]and ileocecal part[53.8%(7/13 cases)], with the main manifestation of ulcer.There were 3 cases with single ulcer and 10 cases with multiple ulcers, including 7 cases with deep and large ulcers.Pathological examinations of endoscopic lesions showed that the main features were mucosa chronic nonspecific inflammation, mucosa chronic active inflammation with ulcer and vasculitis.Conclusions:Clinical manifestations of intestinal BD vary a lot and are non-specific.Some children with intestinal BD may develop severe complications.Endoscopic lesions of intestinal BD have certain characteristics, which contribute to the diagnosis.Gastroenterologists need to be fully aware of intestinal BD.

Objective To investigate the protective effect of hydrogen-rich water on rat cognitive dysfunction induced by ionizing radiation.Methods A total of 20 SD rats were randomly divided into four groups with the ramdom number table method: control group(C),hydrogen-rich water group(HRW),irradiation group(IR)and hydrogen-rich water intervention group(HRW+IR),with 5 rats in each group.The spatial memory ability of rats was tested by a morris water maze.The expression of apoptosis-related genes was detected by real-time fluorescence quantitative PCR.The changes of glutathione(GSH),8-hydroxydeoxy guanosine(8-OHdG)and malondialdehyde(MDA)and SOD were also measured.Results The escape latency(F＝6.003,P＜0.05)and the swimming distances(F＝3.850,P＜0.05)of rats in four different groups had statistically significant differences.Compared with the IR group,the escape latency of the HRW+IR group was significantly decreased at 3,4,5 d after irradiation(P＜0.05),and the swimming distance of this group became much longer(P＜0.05).The levels of GSH,8-OHdG and MDA in these four groups had statistically significant differences(F＝6.450,5.033,4.113,P＜0.05).Compared with IR group,the concentration of GSH was increased(P＜0.05),but MDA and 8-OHdG decreased(P＜0.05)in the brain tissue of HRW+IR group,and the expressions of caspase-3,caspase-9 and bax genes were reduced(t＝2.956,3.087,5.246,P＜0.05),while the expression of bcl-2 gene was enhanced(t ＝-3.640,P ＜0.05)in the HRW+IR group.Conclusions Hydrogen-rich water attenuates the oxidative damage of ionizing radiation by neutralizing oxyhydrogen free radicals and thus protects brain from radiation damage.