Objective To execute quality control of OLYMPUS-PK7300 automated blood grouping analyzer to enhance the quality and efficiency in blood grouping.Methods Measures were proposed from the aspects of specimen quality,reagent quality,instrument maintenance,test parameters setup,internal quality control and external quality assessment,personnel and etc.Results Quality control was carried out at each link of the test by automated blood grouping analyzer to facilitate blood-related clinical operation.Conclusion Whole-course quality control of the analyzer has to be performed to improve blood grouping.

Objective To introduce 13 clinical cases of reconstructing traumatic defect on skin of thumb and first web using nail skin flap of big toe connectedwith tibial flap of second toe.Methods From May 2003 to April 2007,a series of 13 case8 of traumatic thumb and first web defect were treated by transplantation of nail skin flap of big toe connecting with tibial skin flap of second toe.Among which two total hand degloving injury cages were included too.Two kind of way according the Gilbert type of the Ist metatarsus dorsal artery were used.Results All the cases were successful and healed by first intention.The contour of reconstructed thumbs showed to be normal or approximately normal.Follow-up examination were obtained in nine cases for 3-17 postoperative months(average 7 months).Sensations of pain,touch and temperature recovered.The two-point-discrimination sensation were found to be 7-17 mm respectively.Opposition measured were 60°-85°(average 75°).All the patients can be back to work and restored activities of daily living.Conclusion In treating soft tissue defect of thumb and first web,transplantation of the nail skin flap of big toe connecting with tibial lateral skin flap Can yield ideal skin covering and exceHent motor function.

Objective To analyze the blood screening results after adjustment of critical value 40 to 50 U/L and to observe the effect of reducing blood scrap rate and to discuss the correlation between ALT and HBV,HCV infection.Methods We screened 2656 blood donors (ALT >40 U/L)by serological and nucleic acid amplification testing(NAT)in Qingdao blood center from 2013 to 2014,and conducted the correlation analysis by chi square test.Results 1 771 cases (66.68%)were ALT 40-50 U/L,including 6 cases of HBsAg ELISA (+),2 cases NAT (+),4 cases NAT(-).In the 8 cases of anti-HCV ELISA (+)samples,4 cases NAT (+),3 cases NAT (-),1 case with positive TP without NAT result.In 885 blood donors with ALT>50 U/L,5 cases were HBsAg-reactive,7 cases were anti-HCV-reactive,and 873 cases were negative.Related statistics showed that there was no signifi-cant difference between ALT and HBV infection (P <0.05),but significant difference was found between ALT and HCV infection (P >0.05).Conclusion The proportion of blood donors with ALT 40-50 U/L is much higher than that with ALT >50 U/L do-nors.Adjustment of the critical value greatly reduces blood scrap rate.Elevated ALT is associated with the infection of HBV but not with HCV.

Objective To evaluate the effects of tempol administered via different routes on neuropathic pain (NP) in rats.Methods Thirty-two male Sprague-Dawley rats,weighing 250-280 g,aged 8-10 weeks,were randomly divided into 4 groups (n=8 each) using a random number table:sham operation group (group S),group NP,intrathecal tempol group (group T1),and intraperitoneal tempol group (group T2).Neuropathic pain was induced by chronic constriction injury in chloral hydrate-anesthetized rats.The sciatic nerve was exposed and 4 loose ligatures were placed on the sciatic nerve at 1 mm intervals with 4-0 silk thread.The sciatic nerve was only exposed but not ligated in group S.After successful establishment of the model,a catheter was inserted at L4.5 interspace into the epidural space.In S and NP groups,0.9％ normal saline 20 μl was injected intrathecally,and 0.9％ normal saline 200 μl was injected intraperitoneally once a day for 7 consecutive days.In group T1,tempol 30 μg (in 20 μl of normal saline) was injected intrathecally,and 0.9％ normal saline 200 μl was injected intraperitoneally once a day for 7 consecutive days.In group T2,tempol 30 μg (in 200 μl of normal saline) was injected intraperitoneally,and 0.9％ normal saline 20 μl was injected intrathecally once a day for 7 consecutive days.The mechanical paw withdrawal threshold (MWT) and thermal paw withdrawal latency (TWL) were measured at 3 days before operation,and at 1,3,5,7,10 and 14 days after operation.The animals were sacrificed after measurement of pain threshold at day 14 after operation.The lumbar segment of the spinal cord was removed to detect malondialdehyde (MDA) content and superoxide dismutase (SOD) activity by enzyme-linked immunosorbent assay.Results Compared with group S,the MWT was significantly decreased,and the TWL was shortened at each time point after operation,the content of MDA in the spinal cord was increased (P＜0.05),and no significant difference was detected in SOD activity in group NP (P＞0.05).Compared with group NP,the MWT was significantly increased at 5,7,10 and 14 days after operation,the TWL was prolonged at 1,3,5,7,10 and 14 days after operation,the content of MDA in the spinal cord was decreased,and the SOD activity was increased in group T1 (P＜0.05),and no significant change was found in the indexes mentioned above in group T2 (P＞0.05).Conclusion Intrathecal tempol can reduce NP in rats,and the mechanism is related to inhibition of lipid peroxidation in the spinal cord.

AIM:To investigate the expression of up-regulated gene 11 ( URG11 ) in prostate cancer cell line and the effect of URG11 siNRA on the proliferation and invasion of human prostate cancer LNCaP cells.METHODS:The mRNA and protein levels of URG11 in prostate cancer cell lines and normal prostate epithelial cell line were evaluated by real-time PCR and Western blot.LNCaP cells were transfected with designed siRNA using the liposome method.The prolif-eration, apoptosis, migration and invasion abilities of the LNCaP cells were evaluated by MTS assay, flow cytometry, wound-healing assay and Transwell assay.RESULTS:The expression of URG11 at mRNA and protein levels in the DU145, PC3, LNCaP cell lines was significantly higher than that in RWPE-1 cell line.Compared with the control group, the proliferation of LNCaP cells with URG11 siRNA was stagnant in G1/S phase and induced apoptosis.The proliferation of LNCaP cells at 0 h, 24 h, 48 h and 72 h was inhibited after URG11 expression was down-regulated (P<0.05).Transwell assay showed that migration (P<0.05) and invasion (P<0.05) were also inhibited.CONCLUSION:URG11 is highly expressed in prostate cancer.Silencing of URG11 significantly inhibits the proliferation and invasion and induces apoptosis of LNCaP cells.

Objective: To evaluate the safety of enterovirus 71（EV71）inactivated vaccines produced by Wuhan Institute of Bio Products through learning the incidence of adverse events following immunization（AEFI）in children aged 6 months to 3 years old after vaccination. Methods: According to the national requirement for vaccine safety monitoring program，data of AEFI cases after inoculated EV71 vaccines from September 2017 to October 2018 in Zhejiang Province was collected by combining active and passive monitoring. Demographic characteristics，space distribution，dose and incidence of AEFI were analyzed. Results: A total of 107 503 children were included in this study，of which 27 173 were actively monitored and 80 330 were passively monitored. The monitoring results showed that 288 cases of AEFI occurred after inoculated EV71 vaccines，the reported incidence rate was 267.90/100 000. Of 288 cases，266 cases had common reactions（247.43/100 000），14 cases had abnormal reactions（13.02/100 000）and 8 cases had complications（7.44/100 000）；145 cases were passively monitored（180.51/100 000）and 143 cases were actively monitored（526.26/100 000）；150 cases were males and 138 cases were females，with the males to females ratio of 1.09∶1. The AEFI of EV71 vaccines were reported in all the cities of Zhejiang Province，with Jinhua，Taizhou and Hangzhou ranking the top three and accounting for 50.69% of all the reported cases. About 202 cases of AEFI（70.14%）occurred after the first dose of EV71 vaccines，and 163 cases（56.60%）occurred on the day of inoculation.Most of common reactions were fever，swelling and sclerosis. The harm of the reported abnormal reactions was mild，with 8 cases of anaphylactic rash and no other serious abnormal reactions were found. Conclusion The reported incidence rate of AEFI of the domestic EV71 vaccine in children aged from 6 months to 3 years is 267.90/100 000，without serious abnormal reactions，suggesting that the EV71 vaccine is safe.

PURPOSE: To investigate the effects of hyperbaric oxygen (HBO) pretreatment on cognitive decline and neuronal damage in an Alzheimer’s disease (AD) rat model. MATERIALS AND METHODS: Rats were divided into three groups: normal saline (NS), AD, and HBO+AD. In the AD group, amyloid β peptide (Aβ)₁₋₄₀ was injected into the hippocampal CA1 region of the brain. NS rats received NS injection. In the HBO+AD group, rats received 5 days of daily HBO therapy following Aβ₁₋₄₀ injection. Learning and memory capabilities were examined using the Morris water maze task. Neuronal damage and astrocyte activation were evaluated by hematoxylin-eosin staining and immunohistochemistry, respectively. Dendritic spine density was determined by Golgi-Cox staining. Tumor necrosis factor-α, interleukin-1β, and interleukin-10 production was assessed by enzyme-linked immunosorbent assay. Neuron apoptosis was evaluated by terminal deoxynucleotidyl transferase dUTP nick end labeling. Protein expression was examined by western blotting. RESULTS: Learning and memory dysfunction was ameliorated in the HBO+AD group, as shown by significantly lower swimming distances and escape latency, compared to the AD group. Lower rates of neuronal damage, astrocyte activation, dendritic spine loss, and hippocampal neuron apoptosis were seen in the HBO+AD than in the AD group. A lower rate of hippocampal p38 mitogen-activated protein kinase (MAPK) phosphorylation was observed in the HBO+AD than in the AD group. CONCLUSION: HBO pretreatment improves cognition and reduces hippocampal damage via p38 MAPK in AD rats.
Alzheimer Disease/*therapy ; Amyloid beta-Peptides/*administration & dosage ; Animals ; Apoptosis ; *Cognition/drug effects ; Disease Models, Animal ; Enzyme-Linked Immunosorbent Assay ; Hippocampus/*enzymology ; *Hyperbaric Oxygenation ; In Situ Nick-End Labeling ; Interleukin-10/biosynthesis ; Interleukin-1beta/biosynthesis ; Learning/drug effects ; Male ; Memory/drug effects ; Neurons ; Peptide Fragments/*administration & dosage ; Rats ; Rats, Sprague-Dawley ; Sodium Chloride/administration & dosage ; Tumor Necrosis Factor-alpha/biosynthesis ; p38 Mitogen-Activated Protein Kinases/*metabolism

Objective To evaluate the effect of sevoflurane postconditioning on microtubule struc-ture during myocardial ischemia-reperfusion(I∕R)in mice. Methods Thirty-two healthy male C57 mice, aged 7-8 weeks, wighing 20-30 g, were divided into 4 groups(n=8 each)using a random number table:sham operation group(Sham group), group I∕R, sevoflurane postconditioning group(group SP), and mi-crotubule depolymerizer colchicine plus sevoflurane postconditioning group(group CSP). Myocardial I∕R was produced by occlusion of the left anterior descending branch of coronary artery for 30 min followed by 120 min reperfusion in I∕R, SP and CSP groups. Colchicine 004 μmol∕kg was intraperitoneally injected at 30 min before ischemia in group CSP. In SP and CSP groups, 24% sevoflurane was inhaled for 15 min starting from onset of reperfusion. Mice were sacrificed at 120 min of reperfusion, and myocardial speci-mens were obtained for determination of myocardial infarct size and expression of α-tubulin(by Western blot). Results Compared with group Sham, the myocardial infarct size was significantly increased, and the expression of α-tubulin was down-regulated in the other three groups(P<005). Compared with group I∕R, the myocardial infarct size was significantly decreased, and the expression of α-tubulin was up-regula-ted in group SP, and no significant change was found in the parameters mentioned above in group CSP(P>005). Compared with group SP, the myocardial infarct size was significantly increased, and the expres-sion of α-tubulin was down-regulated in group CSP(P<005). Conclusion The mechanism by which sevoflurane postconditionning reduces myocardial I∕R injury is related to stabilizing microtubule structure of mice.

Objective: To investigate the trend of overweight and obesity among Han students aged 7-18 in Ningxia from the year of 2000 to 2019, and to provide scientific basis for obesity prevention and control among children and adolescents. Methods: Based on the five waves of "National Student Physical Fitness and Health Survey" in Ningxia region during 2000 to 2019, body weight, height, waist circumference, hip circumference and other data of Han students aged 7-18 years were included was used for trend analysis. Results: In 2019, the detection rates of overweight and obesity in children and adolescents aged 7 to 18 in Ningxia were 13.34% (1 181/8 855) and 9.19% (814/8 855), respectively. The increase rate of overweight and obesity in boys from 2000 to 2019 was 11.68% and 10.07% ( χ 2=27.60, P <0.01). The rate of overweight and obesity in female students from 2000 to 2019 was 6.95% and 5.77% ( χ 2=33.82, P <0.01). Urban boys had the highest rates of overweight and obesity, which were 11.38% and 10.45%. The growth rate of overweight and obesity in rural boys was higher than that in urban boys after 2010 ( χ 2=13.90,17.09, P < 0.05), and the growth rate of obesity in rural girls was higher than that in urban girls after 2014 ( χ 2=9.94, 33.39, P <0.05). Overweight and obesity prevalence showed positive associations with the economic status in both urban and rural areas ( χ 2=35.19, 35.35, P <0.01). Conclusion From 2000 to 2019, the prevalence of overweight and obesity and body mass index among children and adolescents in Ningxia increased consistently, with more rigirous in rural areas. Specific strategies and measures for overweight and obesity prevention in children and adolescents are in urgent need, to reduce potential social and economic burden.

Objective: To understand the influencing factors underlying physical exercise behavior among children and adolescents aged 9-18 years in Ningxia, China, in 2019, and to provide suggestions for physical exercise among children and adolescents by adopting a social ecological model. Methods: Based on data related to 12 018 children and adolescents in Ningxia aged 9-18 years old which were obtained from the National Survey on Students Constitution and Health in 2019, the survey questions scored based on the four levels of the social ecological model. Results: The proportion of children and adolescents who engaged in physical exercise for less than 1 hour a day accounted for 55.97% of the total number of people in Ningxia. Regardless of whether they were able to engage in enough physical activity, individual factors played a dominant role in influencing the behavior of the children and adolescents, and an interaction was found between influencing factors at different levels( r=-0.01, 0.01, -0.08, 0.04, P <0.01). The results of the stepwise regression analysis showed that the personal factors e.g. sports makes me healthy, I don t have enough time, muscle strength exercise, I have no movement of any relationship partner, sports make me know partner, policy in the number of physical education, number of sports meeting in a school year, the average daily lesson hold number all affect children s sports activities in time( B =-0.05-0.16, P <0.01). Conclusions The lack of physical exercise among children and adolescents in Ningxia is the result of multiple factors. Comprehensive and diversified intervention should be administered from a socio ecological framework to promote the formation of physical exercise habits among children and adolescents.