Objective To investigate neonatal cerebral oxygenation after hypoxia.Methods Cerebral oxygenation of 39 babies with perinatal hypoxia and 42 neonates without hypoxia was ob- served under quiet state and stimulation of sound by Near Infrared Spectroscopy(NIRS) and com- paired with the findings of EEG and image studies.Results In normal neonates cerebral oxygena- tion was steady under quiet state,where as it increased after sound stimulation.However,newborns with hypoxia showed inhibited brain activities with little changes in cerebral oxygenation in response to sound stimuli.Episodes of deoxygenation were found in 13 cases during monitoring.Conclusion After perinatal hypoxic brain damage,the function of cerebral oxygenation can be still abnomal for a certain period,which is related to the degree of brain damage.

OBJECTIVE:To study the anti-oxidative effects of spirulina kinase (SPK) in vitro. METHODS:The methods of phenanthroine-Fe2+ oxidation method,DPPH and auto-oxidation of pyrogallol were used to measure the effects of different concen-trations of SPK on scavenging hydroxyl (OH-) free radical,DPPH free radical and superoxide anion (O2-) free radical;IC50 of SPK was calculated. Prussian blue reaction was used to determine total reducing ability(by absorbance)of different concentrations of SPK to Fe3+. Vitamin C(VC)was used as positive control in above trials. RESULTS:SPK could eliminate the OH-free radical, DPPH free radical and O2- free radical in concentration-dependant manner,and the maximum elimination rate of SPK to OH- free radical and DPPH free radical were 86.82% and 78.98%(IC50 were 54.31,0.636 g/L),which were higher than VC (64.77%, 73.49%). The maximum elimination rate of SPK to O2- free radical was 78.31%(IC50 was 3.918 g/L),which was lower than VC (94.14%). In reducing ability test,SPK improved absorbance in reducing ability test system,and maximum absorbance was simi-lar to VC in concentration-dependant manner. CONCLUSIONS:SPK has obvious anti-oxidant activities in vitro.

BACKGROUND: Previous studies have verified that under normal culture of neural stem cells (NSCs), folic acid can accelerate proliferation of NSCs by phosphorylation of mitogen activated protein kinase path activation ERK1/2. OBJECTIVE: To investigate the effect of folic acid on NSC extracellular signal regulatory protein kinase pERK1/2 under hypoxic condition. METHODS: NSCs from Neonatal rats were cultured in vitro by serum-free culture method, and incubated in a flask at 1×10~8/L. Except normal control group, self-made hypoxia equipment was used in the hypoxia model, folic acid deficiency and folic acid supplemented groups at day 3. At 37 ℃, hypoxia culture was conducted in the thermostat for 6 hours. The contents of folic acid were 4 mg/L, 4 mg/L, 0.65 mg/L, 8 mg/L in the four groups. Cells following 6 days were collected to count the density using trypan blue. RT-PCR was utilized to detect pERK1/2 mRNA expression. Western blot assay was employed to determine pERK1/2 protein expression. RESULTS AND CONCLUSION: Compared with the normal control group, the proliferation of NSCs and the expression of ERK1/2mRNA and pERK1/2 protein were decreased significantly in the hypoxia model group. Compared with the hypoxia model group, the proliferation of NSCs and the expression of ERK1/2mRNA and pERK1/2 protein were increased in the folic acid supplemented group, whereas decreased in the folic acid deficiency group. There were significant differences among groups (P < 0.001). Above-described results verified that folic acid supplementation can activate ERK1/2 phosphorylatin and accelerate proliferation of NSCs under hypoxia condition.

BACKGROUND:Interleukin-12 (IL-12) may function as an immune regulator in the pathogenesis of osteoarticular tuberculosis. OBJECTIVE:To explore the association of single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C with susceptibility to osteoarticular tuberculosis and serum interleukin-12 levels in Guangxi Zhuang population. METHODS:The single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C polymorphisms were detected by polymerase chain reaction-single base extension technique and direct DNA sequencing in 150 patients with osteoarticular tuberculosis (disease group) and 165 healthy individuals (control group) in Guangxi Zhuang population. The genotype and al ele frequencies of IL-12 and the relationship of genotypes to the susceptibility to osteoarticular tuberculosis were analyzed. In addition, the association of genotypes of single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C with serum IL-12 levels were analyzed. RESULTS AND CONCLUSION:There was no significant difference in the genotype and al ele frequencies of IL-12A rs568408 G/A and IL-12B rs3212227 A/C between the disease group and the control group (P>0.05). Moreover, there was no difference in four haplotypes of IL-12 gene between the disease group and the control group (P>0.05). Serum IL-12 levels in subjects with osteoarticular tuberculosis carrying the variant rs568408 GA/AA genotypes and wild-type rs568408 GG genotypes were similar (P>0.05). Similarly, there was no significant difference in serum IL-12 levels between subjects with osteoarticular tuberculosis carrying the variant rs3212227 AC/CC genotypes and wild-type rs3212227 AA genotypes (P>0.05). These findings suggest that the single-nucleotide polymorphisms in IL-12A rs568408 G/A and IL-12B rs3212227 A/C polymorphisms are not associated with susceptibility to osteoarticular tuberculosis in Guangxi Zhuang population.

AIM To modify and improve a screening assay so that it becomes more convenient, economic and adaptable in China for high throughput screening of HIV fusion inhibitors targeting gp41. METHODS The original screening method reported by Jiang et al (J Virol. Methods 1999;80:85 96) was modified by: ① using a conformation specific monoclonal antibody to replace a polyclonal antibody for coating plates; ②simplifying the procedures; ③using parts of the reagents produced in China. RESULTS The modified screening assay is simpler, more convenient, and more economic than the original assay, but its sensitivity is comparable to and specificity is a little better than the original method. CONCLUSIONS The modified screening assay is more convenient and economic and can be used in China for high throughput screening of HIV fusion inhibitors from complex sample, such as phage display peptide libraries, microorganism fermentation liquids, herbs and other natural products.

BACKGROUND:To repair and reconstruct the joint capsule and surrounding ligaments is one of effective methods against displacement and dislocation after total hip arthroplasty. In recent years, anterolateral total hip arthroplasty has been widely used, but little is reported on the anatomic features of the anterolateral hip joint capsule and iliofemoral ligament. OBJECTIVE:To investigate the anatomic features of the anterolateral hip joint capsule and iliofemoral ligaments, thereby providing anatomic evidence for selecting and optimizing the approach for total hip arthroplasty and for clinical practice. METHODS:Thirty adult cadaver hips fixed with formalin were used for this study. The anterolateral hip joint capsule and the iliofemoral ligaments were dissected and anterolateral hip joint capsules were divided into three sections and nine parts. The average thickness of each part and the average height and width of each section were measured. The anterolateral hip joint capsule was observed by its beginning and ending, course, branch and histological features. RESULTS AND CONCLUSION:The anterolateral hip joint capsule was tightly connected with the iliofemoral ligaments to form a complex. The thickness of the capsule was varied. The thinnest parts of the complex were BI and BII. In addition, the average height and width of each section were different. The joint capsule originating from the anterior inferior iliac spine and acetabulum was divided into three branches and fixed on the intertrochanteric line. Understanding of the anterolateral hip joint capsule and iliofemoral ligaments may make for the approach selection, design and optimization of total hip arthroplasty.

Objective To review and investigate the malaria control history of Wuzhou City,Guangxi Zhuang Autonomous Region from 1950 to 2015,so as to provide the evidence for future malaria control and surveillance. Methods The data of ma?laria control in Wuzhou City from 1950 to 2015 were collected and analyzed. Results In 1950 decade,the malaria incidence in Wuzhou City was 1 435.55/100 000,higher than the average level in Guangxi,and the mortality of malaria was 0.95/100 000. The malaria incidence of local residents was reduced to 3.61/100 000 in 1979 and no local malaria case was found since. The im?ported malaria cases were found in Wuzhou City since 1980,and were more than local cases since 1981. In recent five years, 87.50%(7/8)of imported malaria cases were from south?east Asia. Conclusions Wuzhou City has reached the national criteri?on of malaria elimination,but the imported malaria is the recent threat. The surveillance and control work of malaria should be strengthened.

OBJECTIVE:To provide reference for further promoting the clinical application of chronopharmacology and rational drug use.METHODS:The self-designed questionnairea was used to conduct on-site investigation among participants from 40 hospitals in Anhui province by dint of a meeting.The survey data were analyzed statistically.RESULTS:Totally 170 questionnaires were distributed,and 166 were retrieved,the total response rate was 97.65％.93.37％ of the interviewed pharmacists were aware of the circadian rhythms,and 87.35％ were aware of the circadian rhythms of more than two kinds;interviewed pharmacists expressed better awareness of indicators like gastric acid secretion (75.30％),blood pressure (67.47％) and growth hormone (66.87％) etc.while their awareness of other diseases like anaphylactic rhinitis (66.87％),gastric ulcer (50.60％) and migraine (50.00％) remained to improve.All the interviewed pharmacists recognized the better therapeutic efficacy (84.34％) and lower side effect (81.33％) of chronopharmacology-referred medication;chronopharmacology characteristics of glucocorticoid drugs were best known (34.34％),followed by antihypertensive drugs (25.30％).CONCLUSIONS:Pharmacists in Anhui province have certain knowledge of chronopharmacology such as biological rhythms,biological process or indicators,biological rhythms of disease and advantage of chronopharmacology-referred medication.It indicates that there has been a foundation for popularizing the concept of chronopharmacology in clinical medication in China;but not often contacted physiological processes or indexes,the understanding of biological rhythm of uncommon diseases are still insufficient,and the understanding of chronopharmacology characteristics of various drugs are far from ideal.

Objective Toinvestigatetheeffectofpressureandnon-pressureonthedirectimagingoflowerlimbdeepveinswith CTvenography(CTV).Methods 100patients(50malesand50females,aged30－80yearsold,mean (63.5±13.5yearsold)with suspectedlowerextremityvenousdiseasesfrom September2015to October2018 wereretrospectivelyanalyzed.50patientswere scannedafterpressingtheankle(controlgroup),andtheother50werescannedwithoutpressingtheankle(experimentalgroup).Results Therewerenosignificantdifferencesbetweenthecontrolandexperimentalgroupsintheauxiliaryveinscore (t＝－0.20,P＝0.82), femoralveinscore(t＝－0.1,P＝0.91),andtotaliliacveinscore(t＝－0.03,P＝0.97).Conclusion CTV withoutpressingtheankle demonstratescomparableefficacytodirectimagingoflowerlimbdeepveins,withgoodimagequality,reducedcomplicationsandeasy toapply,sothatitshouldbewidelyusedinclinicalpractice.

PURPOSETo explore the impact of subtropical maritime monsoon climate on the frequency of ambulance use for trauma patients in a coastal region in China.

METHODStatistical analysis of data on ambulance use from the 120 Emergency Command Center in Shantou City, Guangdong Province, from January to December 2012 as well as daily meteorological data from a Shantou observatory was performed to determine how climatic factors (seasons, time, and weather) affect the frequency of ambulance use for trauma patients.

RESULTSThe daily ambulance use for trauma patients differed between spring and summer or autumn (p<0.05), between sunny and rainy days (p<0.05), and between cloudy and lightly or moderately rainy days (p<0.05).We found a linear correlation between daily maximum temperature and daily ambulance use for trauma patients (R² =0.103, p<0.05). In addition, there was significant difference in ambulance use between good and bad weather (p<0.05).

CONCLUSIONFrequency of ambulance use for trauma patients is affected by the subtropical maritime monsoon climate in the coastal region. Better weather contributes to increased daily frequency of ambulance use, which is the highest in autumn and lowest in spring.