Objective To establish an external calibration method of atomic absorption spectrometry-graphite furnace for determination of heavy metals Pb,Cd,Sb in tetracaine hydrochloride injection.Methods Microwave digestion for the pretreatment method was used,three kinds of heavy metal elements were determined by graphite atomic absorption spectrometry-graphite furnace Results The linear ranges of Pb,Cd,Sb were 0-80.0 ng/mL,0-2.0 ng/mL,0-40.0 ng/mL,therecovies were 92.7%-105.7%,95.8%-103.4%,92.1%-103.5%,respetively.The relative standard deviationless than 6.0%(n=9).Conclusion The method is simple and accurate,which can be used for the control of Pb,Cd,Sb in tetracaine hydrochloride injection.

Objective To investigate the effectiveness of oxytoein antagonist atosiban in the alternative rescue therapy of preterm labor.MethodsAlternative toeolysis atosiban was given as rescue therapy to 35 women,who had received ritodrine or magnesium sulphate but failed,due to either progression of labour or intolerable adverse events.Atosiban was administered for up to 48 hours.Efficacy and tolerability were assessed based on the proportion of women who did not deliver and did not need alternative toeolytie therapy at 48 hours and 7 days after therapy initiation.The numbers of maternal adverse events and neonatal morbidity were also assessed.ResultsEfficacy and tolerability at 48 hours and 7 days after atosiban nitiation were 77％(27/35)and 60％(21/35).One woman presented drug-related side effects with mild nausea and omiting.Thirty-four women have delivered and one bigemina(28 weeks)is being followed-up.In 34 women,11 delivered before 28 gestational weeks,17 delivered after 28 gestational weeks,3 delivered after 34 weeks and 3 had term delivery.Pregnancies were rolonged by 4 hours to 14+2 weeks.There were nine neonatal deaths,with gestational ages less than 28 weeks at delivery.Conclusion xytocin antagonist atosiban could be given as alternative rescue therapy if therapy with ritodrine or magnesium sulphate fails in the treatment of preterm labor,and it is safe and effective.

ObjectiveTo analyze the characteristics of magnetic resonance diffusion tensor imaging(DTI)and diffusion tensor tractography (DTIT) in patients with cerebral infarction, and explore the diagnosis values and prognosis of diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) in patients with cerebral infarction in different stages. Methods58 patients with cerebral infarction in different stages and 25 healthy volunteers were examined by magnetic resonance imaging(MRI), including conventional T1 and T2 weighted imaging, DWI and DTI. Fractional anisotropy (FA) images were reconstructed. The values of FA and apparent diffusion coefficient (ADC) were measured in the infarcted regions, corresponding contralateral normal regions and corresponding normal regions in normal control group. Results①DWI and DTI showed size of infarction focus was more accurate and clearer than that of conventional MRI; ②The FA and ADC values of the infarcted regions during superacute stage, acute stage, subacute stage and chronic stage were (0.24±0.02, 0.31 ±0.11), (0.20±0.02, 0.32±0.12), (0.18±0.02, 0.34±0.11) and (0.16±0.02, 0.37±0.13), respectively, lower than those in the contralateral corresponding regions which were (0.40±0.03, 0.70±0.21), (0.37±0.03, 0.71±0.21), (0.39±0.03, 0.72±0.22) and (0.40:±0.03, 0.72±0.23), respectively. The differences were statistically significant (P＜0.05). The FA and ADC values had no significant differences between the uninjured sides in patients with cerebral infarction and the corresponding regions in the normal control group (P＞0.05); ③The FA and ADC values in brain tissues changed regularly with the time of infarction after cerebral infarction. The FA values in the affected sides had no consistent changes as compared with the contralateral sides in the superacute stage. They increased or decreased slightly, then (during acute stage, subacute stage and chronic stage) decreased irreversibly. The ADC values in the affected sides changed with time regularly, they decreased significantly, gradually returned to normal, and then increased again. Conclusion DTI and DTT examination contribute to the diagnosis of cerebral infarction. The combination of the FA and ADC values may more accurately conduct clinical staging and evaluate the time of the occurrence of cerebral infarction.

Objective To explore the correlation between hypokalemia and sudden death in young and middle-aged people. Methods One hundred and twenty-nine young and middle-aged patients with sudden death during treatment were selected as observation group. Then 100 cases of healthy volunteers were randomly selected as control group. The incidence of cardiovascular disease, incidence of hypokalemia and intake of potassium were compared between 2 groups. Results The incidences of hypertension, arrhythmia, myocardial infarction, heart failure and hypokalemia in observation group were significantly higher than those in control group: 17.05% (22/129) vs. 5.00%(5/100), 13.18% (17/129) vs. 2.00% (2/100), 26.36% (34/129) vs. 9.00% (9/100), 9.30% (12/129) vs. 1.00% (1/100) and 55.04% (71/129) vs. 12.00% (12/100), and there were statistical differences (P<0.01). The ratios of higher, common, lower intake of potassium in observation group were 1.55%(2/129), 27.91% (36/129) and 70.54%(91/129), in control group were 15.00% (15/100), 58.00% (58/100) and 27.00% (27/100), and there was statistical difference (P<0.01). Logistic regression analysis result showed that hypertension, arrhythmia, myocardial infarction, heart failure, hypokalemia and lower intake of potassium were the risk factor for sudden death (P<0.01). The incidences of hypertension, arrhythmia, myocardial infarction and heart failure in hypokalemia patients were significantly higher than those in normokalemia patients: 28.92% (24/83) vs. 2.05% (3/146), 19.28% (16/83) vs. 2.05% (3/146), 44.58%(37/83) vs. 4.11% (6/146) and 13.25% (11/83) vs. 1.37% (2/146), and there were statistical differences (P<0.01). The incidence of hypokalemia in people with lower intake of potassium was significantly higher than that in people with higher and common intake of potassium: 56.78% (67/118) vs. 2/17 and 14.89%(14/94), and there was statistical difference (P<0.01). Conclusions There is a significant correlation between hypokalemia and sudden death in young and middle-aged people. Preventive measures of sudden death should be made according to serum potassium level in clinic. People should pay attention to the uptake of potassium in daily life.

Objective To explore the effect of cyclogest and femotroneinthreatened abortion treatment and summerize key points of nursing. Methods Forty-two cases of first trimester threatened abortion women were selected from department of gynecology and obstetrics, which were randomly divided into the control group (n=21) and experiment group (n=21)using random digit table. The control group was given femotrone 40mg intramuscular injection each day while the experiment group was given 90 mg of vaginal progesterone suppository (Cyclogest) each day. Compare the improvement of symptoms, the success rate of pregnancy, changes in serum human chorionic gonadotropin (HCG) and progesterone. Results The improvement of symptoms, curative effects and change of HCG of both groups were no significantly difference. But elevatorconcentration of serum progesterone in femotrone group was higher than that of the cyclogest groupwith statistically difference. Conclusions Although cyclogest cannot appear significantly in increasing serum progesterone levels, it has the same effect as femotrone. Recommendations and notes about the use and side effects of cyclogest and femotrone should be provided for education to alleviate concerns of patients.

Objective To investigate the interconnection of the executive control network in major depressive disorder when they recognized the sad facial stimuli,and to discuss the aberrant mechanism of emotion processing.Methods Twenty major depressive patients and 20 well-matched healthy volunteers participated in the experiment.The brain actions of all subjects were recorded by the magnetoencephalography (MEG) when they were required to distinguish the emotion face.Based on prior knowledge,the interested brain area consisted of the primary visual cortex (V1),the orbitofrontal cortex(OFC),the dorsolateral prefrontal cortex (DLPFC),the anterior cingulated cortex (ACC).Then constructing three competing models to select an optimal model by the method of dynamic causal model(DCM),finally the differences of the effective connections of the optimal model between the depressed patients and healthy controls were analyzed.Results According to the results of Bayesian model selection (BMS),model 1 had the most exceedance probability of 0.80 with the features that there were bidirectional modulatory connections between the OFC,ACC and DLPFC.Given the best model,the parameters of effective connectivity of the optimal model were extracted,and then two-sample t-test over the model 1 was adopted.The modulatory effective connectivity from the OFC to the DLPFC in both hemisphere(t=-2.73,P=0.0096;t=-3.01,P=0.0046) and the OFC to the ACC (t=-2.93,P=0.0057) in the left hemisphere were significantly reduced in MDD.Conclusion There exists abnormal function of executive control network in depressed patients,the decreased effective connections between the OFC and the DLPFC,as well as the OFC and the ACC,may have correlation with the negative

BACKGROUNDTo isolate and identify the genes related to cancer metastasis by comparison of two cell strains with different metastasis potentials subcloned from human lung giant cell carcinoma cell line.

METHODSSuppression subtractive hybridization (SSH) was used to compare the levels of gene expression between the two cell strains and SSH library was constructed. After screening the library by gene chip, the expressed sequence tags (ESTs) with different expressing level were sequenced and blasted with GenBank.

RESULTSSeventy-nine genes were obtained that were expressed much higher in PLA-801D than in PLA-801C, including two full-length cDNA. GenBank Accession numbers of the two cDNA, named MAG-1 and MAG-2, were BC006236 and BC002420, the 8.5 kb MAG-1 gene was composed of four exons and located on the chromosome of 4q21. The MAG-2 gene, which was made up by 9 exons, had a length of 5.2 kb and its location was 2q35. Both sequences had open reading frames (ORF) and promoters before the theoretical transcription start points. Using special software, the secondary structure of theoretical products of the two cDNAs was prognosticated, α-helix was the main proportion, but β-pleated sheet and random coil were also included.

CONCLUSIONSThe expression of MAG-1 and MAG-2 has significant differences in these two cell strains, so they might impact tumor metastasis in some ways that are still uncharted.

Ocular graft-versus-host disease is one of the common complications after hematopoietic stem cell transplantation. Dry eye is the main clinical manifestation. Severe complications, such as corneal ulcer perforation and ocular surface failure may occur along with the progression of ocular graft-versus-host disease, which affects the visual acuity and quality of life of the patients. At present, multiple international researches and clinical guidelines for adult ocular graft-versus-host disease have been available. Nevertheless, pediatric ocular graft-versus-host disease has captivated insufficient attention, and relevant basic data and diagnostic criteria are still lacking. Children possess limited capability to express ocular symptoms, and lack of cooperation in clinical examination. In addition, ophthalmologists have insufficient understanding of this disease, which collectively increase the risk of missing diagnosis and misdiagnosis. In this article, the research progress on the pathogenesis, incidence, risk factors, clinical manifestations, diagnosis and treatment of pediatric ocular graft-versus-host disease was reviewed, aiming to provide ideas for strengthening clinical trials and expanding basic research of this disease in children.

BACKGROUND:Autophagy has become a rapidly developing research hotspot in the biomedical fields.Many researchers are actively exploring the molecular regulatory mechanism of autophagy in a variety of diseases.However,the role of autophagy in hair growth is still unknown. OBJECTIVE:To review the current research progress and application value of autophagy in hair growth and regeneration,to understand the role of autophagy in hair growth,to explore the pathogenesis of autophagy in pathological hair loss,and to provide new ideas for the study of drugs for hair loss. METHODS:Using"hair follicle growth,hair growth,hair regeneration,autophagy associated proteins,autophagy activity,autophagy associated genes,autophagy"as Chinese search terms and"hair growth,hair follicle,hair regeneration,autophagy"as English search terms,PubMed and CNKI databases were searched.The research progress on autophagy,hair growth and the role of autophagy in hair growth in and outside China in recent years was reviewed and summarized.Articles incompatible with the subject content of the paper were excluded.Finally,78 articles were included for the result analysis. RESULTS AND CONCLUSION:(1)Autophagy is a normal metabolic process in eukaryotes with complex molecular mechanisms and functional properties,which is beneficial to cell survival and cell death.(2)Alopecia-related diseases are associated with changes in autophagy activity,which can regulate hair growth cycle.Knockout or overexpression of autophagy-related genes can change the state of hair growth.Multiple autophagy related signaling pathways have been found to be related to hair follicle growth.Activators or inhibitors of autophagy can be used to treat or prevent hair loss.

OBJECTIVETo assess the frequencies of CYP21A2 gene mutations among patients from Fujian area with classical 21-hydroxylase deficiency.

METHODSFor 19 probands from different families affected with classical steroid 21-hydroxylase deficiency and 74 family members, mutations of the CYP21A2 gene were analyzed with combined nested polymerase chain reaction, Sanger sequencing and multiplex ligation-dependent probe amplification. Time resolved fluorescence immunoassay was performed to determine the level of 17-hydroxyprogesterone (17-OHP) in all family members. Clinical data and laboratory results of the probands and their family members were analyzed.

RESULTSEleven mutations were identified among the 38 alleles from the 19 probands. 92.1% (35/38) of the mutant CYP21A2 alleles were due to recombination between CYP21A2 and CYP21A1P. Gene conversion and deletions were identified in 84.2% (32/38) and 7.9% (3/38) of the alleles, respectively. IVS2-13A/C>G and chimeras were the most common mutations, which respectively accounted for 34.2% (13/38) and 18.4% (7/38) of all mutant alleles. Among these, IVS2+1G>A and Q318X+356W were first reported in China. 74.3% (55/74) of the family members were carriers of heterozygous mutations. However, no significant difference was found in the 17-OHP levels between carriers and non-carriers (P>0.05).

CONCLUSIONThere seems to be a specific spectrum of CYP21A2 gene mutations in Fujian area, where IVS2-13A/C>G and chimeras are the most common mutations.

Adrenal Hyperplasia, Congenital ; genetics ; Alleles ; Female ; Humans ; Male ; Mutation ; genetics ; Steroid 21-Hydroxylase ; genetics