Objective To explore the independent risk factors and distribution of intracranial arterial stenosis in young pa‐tients with acute lacunar infarction .Methods We retrospectively reviewed the clinical data of 30-45 year‐old young patients with lacunar infarction who were admitted to the Third Affiliated Hospital of Xinxiang Medical University .The patients were divided in‐to two groups according to their skull blood vessel examination :intracranial arterial stenosis group and intracranial arterial stenosis group .Results There were 28 cases of intracranial large artery stenosis and 17 cases without stenosis in 45 young patients ,it was found that the levels of triglyceride ,low density lipoprotein cholesterol and carotid artery plaque in the intracranial arterial stenosis were significantly less than those of the intracranial artery stenosis (P<0 .05) .In the intracranial artery stenosis group ,15 cases were single vessel stenosis ,13 cases were multiple stenosis ,the difference was not statistically significance (P>0 .05) .Simple ante‐rior circulation stenosis in 12 cases ,simple posterior circulation stenosis in 8 cases ,only the anterior and posterior circulation in‐tracranial artery stenosis ,vascular risk factors were not statistically significant ( P> 0 .05 ) .Binary Logistic regression analysis showed that LDL cholesterol was an independent risk factor of intracranial arterial stenosis .Conclusion With intracranial artery stenosis in young patients with lacunar cerebral infarction prone to progressive stroke ,young patients with cerebrovascular infarc‐tion should be examined .

Objective To evaluate the clinical significance of serum procalcitonin (PCT)in early diagnosis of pul-monary tuberculosis (PTB)complicated with pulmonary infection.Methods Clinical data of active PTB patients admitted to a hospital between August and December 2013 were collected,patients were divided into bacterial infec-tion group(n=104),fungal infection group(n=37)and control group (n=95)according to whether patients were associated with bacterial infection,fungal infection,and without infection,serum PCT concentrations in three groups were compared,receiver operating characteristic (ROC)curve analysis was conducted.Results The median PCT concentrations in bacterial infection and fungal infection group was 0.44ng/mL and 0.30ng/mL respectively, which was significantly higher than 0.16ng/mL of control group(Z =9.49,3.51 respectively,both P <0.001 ).The area under curve (AUC)was 0.89(0.84-0.93)and 0.69(0.61 -0.77)respectively;cut-off point was 0.31 ng/mL and 0.27 ng/mL respectively;sensitivity was 79.81%(70.57%-86.80%)and 59.46%(42.19%-74.80%)respectively;specificity was 83.16%(73.79%-89.78%)and 73.68%(63.48%-81.95%)respectively.Conclusion PCT level is a valuable predictor for early diagnosis of PTB complicated with pulmonary infection,and can provide reference for the rational use of antimicrobial agents.

ObjectiveTo immunoscreen the mimic peptides of Mycobacterium tuberculosis antigen from phage displayed 12-mer peptide library.MethodsSpecific IgG was purified from sera of patients with TB and used as the target to immunoscreen a phage random peptide library of 12 amino acids.Positive clones which were obtained after three rounds of biopanning were detected by ELISA and sequenced.The diagnostic value of the high frequent positive clones were observed by ELISA.Results After 3 rounds of immunoscreening,the eluted phages were enriched effectively.Six kinds of animo acid sequence were obtained from twelve positive phage clones.Sensitivity of the two high frequent positive clones were 71.4％ (A2)and 55.4％ (A7) respectively.ConclusionThe antigen-mimic peptide was successfully screened from 12 random phage peptide library and the peptides can be recognized by tuberculosis patients' polyclonal antibodies.

Objective: To investigate the mechanism of tea polyphenol in inhibiting microsatellite instability (MSI) of colorectal cancer. Methods: Using LoVo cells and SW480 cells treated with aqueous solution of tea polyphenol, cell proliferation was detected by methyl thiazolyl tetrazolium (MTT) method, changes in microsatellite sequences were detected by genescan method and changes in gene expression of LoVo cells were detected by illumina expression arrays and quantitative real-time polymerase chain reaction (PCR). Results: The proliferation inhibition rates of LoVo and SW480 cells treated with tea polyphenol increased with the increasing of drug concentration and showed an increasing tendency with time. The proliferation inhibition rate of LoVo cells with tea polyphenol was higher than that of SW480 cells, and there was a significant difference in the proliferation inhibition rates at 24 h, 72 h and one week. The microsatellite sequence of LoVo cells treated with tea polyphenol remained stable. The gene expression arrays and quantitative real-time PCR suggested that tea polyphenol inhibited the gene expressions of MT2A, MAFA, HES1 and JAG1 nearly two-fold over controls. It was also found that tea polyphenol inhibited the BAX and p38 genes with a more than two-fold difference but did not significantly inhibit the nuclear factor-κB pathway. Conclusion: Tea polyphenol significantly inhibited the proliferation of MSI colorectal cancer cells and stably maintained the microsatellite state in MSI colorectal cancer. Tea polyphenol inhibited the gene expressions of HES1, JAG1, MT2A and MAFA, up-regulated the gene expression of BAX and down-regulated that of P38. Further research is required to investigate how these pathways are interrelated.

Specific antibodies purified from sera of rabbit infected with Toxoplasma gondii were used to immun-oscreen the 12-mer and 7-mer phage random peptide libraries. By 3 rounds of screening, 70 clones were picked out ra-ndomly to test the specificity and 43 were found positive by ELISA. 23 of the 43 positive clones showing strong reaction in ELISA were picked out for sequencing. Clone A7 was selected as mimic antigen in ELISA test after analysis of the 23 short peptide sequences. 23 out of 47 sera from rabbits infected with Toxoplasma gondii were ELISA positive by A7 mimic antigen with a positive rate of 68.1%, and 10 of 155 sera from healthy persons showed false positive with a sp-ecificity of 93.5%. The primary result suggests that mimic antigen may have a potential use in diagnose of toxoplasmosis.

Objective To investigate the effect and mechanism of melatonin on bioactivity of fibroblasts from human hypertrophic scar.Methods Fibroblasts from hypertrophic scar were cultured and incubated with melatonin,melatonin and Luzindole,and Luzindole,respectively,for 24 h,and the media as control.XTT/PMS assay was used to measure the proliferation of fibroblasts,ELISA assay to detect the TGF-β1 production of fibroblasts,and the expression of cell a-SMA,collagen Ⅰ,collagen Ⅲ mRNA were determined with real-time PCR method.Results Compared with the control,melatonin at the concentration of 10-5mmol/L,10-3mmol/L,and 1 mmol/L could inhibit the proliferation of fibroblasts in a does-dependent manner (P＜0.05); melatonin at the concentration of 10-3 mmol/L could significantly decrease the TGF-β1 production and expression of a-SMA mRNA and collagen Ⅰ mRNA in fibroblasts from human hypertrophic scar (P＜0.05) ; the effect of melatonin on fibroblast was significantly blocked by Luzindole (P＜0.05),but melatonin could not inhibit collagen Ⅲ mRNA expression (P＞0.05).Conclusions Melatonin can significantly regulate the biological activity of fibroblasts from human hypertrophic scar through a receptor pathway.

Objective To investigate the effects of nasal tip reduction with inner incision combined with external fixation,namely,to evaluate the formation of bilateral alar groove which is en hanced by external fixation with small splints,after removing interdomal fat pad as well as adjusting alar cartilage to reduce nasal tip.Methods Alar cartilage and interdomal fat pad were exposed via the bilateral nasal vestibular incision to remove fat pad and part of enlarged lateral foot of alar cartilage.After suture of incision,based on the tissue removal,plastic splint was used for external fixation of bilateral nasal tip and alar groove for one week,to enhance the formation of alar groove.Results A total of 143 patients were followed up for more than 6 months after operation.Photographs taken before and after operation were compared,suggesting obviously smaller nasal tip and significant alar groove.Left and right alar groove space was decreased from preoperative (28.23±3.31) mm to post operative (23.72±2.65) mm,and nasal tip alar angle was decreased from (104.02±9.57)°to (87.78± 6.98)°,with statistical significance (P＜0.05).Slightly asymmetric nasal alars were found in 6 patients during follow-up examination,while tiny scars caused by splints (at 0.6 cm from the edge of splints) were found in 1 patient.Conclusions On the basis of nasal tip reduction with inner incision,the method of suture with small splints combined with external fixation is simple,effective and available.

Gluconobacter oxydans is known to oxidize glucose to gluconic acid (GA), and subsequently, to 2-keto-gluconic acid (2KGA) and 5-keto-gluconic acid (5KGA), while 5KGA can be converted to L-(+)-tartaric acid. In order to increase the production of 5KGA, Gluconobacter oxydans HGI-1 that converts GA to 5KGA exclusively was chosen in this study, and effects of carbon sources (lactose, maltose, sucrose, amylum and glucose) and nitrogen sources (yeast extract, fish meal, corn steep liquor, soybean meal and cotton-seed meal) on 5KGA production were investigated. Results of experiment in 500 mL shake-flask show that the highest yield of 5KGA (98.20 g/L) was obtained using 100 g/L glucose as carbon source. 5KGA reached 100.20 g/L, 109.10 g/L, 99.83 g/L with yeast extract, fish meal and corn steep liquor as nitrogen source respectively, among which the optimal nitrogen source was fish meal. The yield of 5KGA by corn steep liquor is slightly lower than that by yeast extract. For the economic reason, corn steep liquor was selected as nitrogen source and scaled up to 5 L stirred-tank fermentor, and the final concentration of 5KGA reached 93.80 g/L, with its maximum volumetric productivity of 3.48 g/(L x h) and average volumetric productivity of 1.56 g/(L x h). The result obtained in this study showed that carbon and nitrogen sourses for large-scale production of 5KGA by Gluconobacter oxydans HGI-1 were glucose and corn steep liquor, respectively, and the available glucose almost completely (85.93%) into 5KGA.
Bioreactors ; Carbon ; chemistry ; Culture Media ; chemistry ; Fermentation ; Gluconates ; metabolism ; Gluconobacter oxydans ; metabolism ; Industrial Microbiology ; Nitrogen ; chemistry

Objective To observe the rates of local complications (bleeding/swelling) after trans-radial coronary intervention (TRI),to investigate possible impact factors,in order to provide guidance for the prevention of these adverse events.Methods A total of 198 cases who performed TRI at the department of interventional cardiology of the First Affiliated Hospital of Sun Yat-sen University from August to December,2011 were included in the present study.Data with regards to local complications were collected peri-operatively,by means of direct inquiry,point-of-care observation and measurements,and laboratory testing.Patients who developed complications and patients who did not were compared in terms of compressor position,loosening protocol and so on.Variables with statistical significance in univariate analysis were further included in Cox regression.SPSS 18.0 software was applied for all statistical analysis.Results The relative risks (RR) of the following two variables,namely whether or not the midpoint of compressor was on the midline of forearm,and the vertical distance from the horizontal plate of the compressor to the puncture site,were 2.602 and 1.403,respectively.Conclusions The midpoint of compressor on the midline of forearm,and the vertical distance from the horizontal plate of the compressor to the puncture site were major risk factors of local complications after TRI.

Objective To analyze the correlation between anterior circulation artery stenosis and lacune or lacunar infarct(LI) in elderly patients.Methods A retrospective analysis of data was performed in 111 patients with intracranial artery atherosclerosis,ischemic cerebral infarction or transient ischemic attack from January to December 2016 in our hospital.All the patients underwent non-contrast brain MRI or CT scan,as well as one-stop dynamic whole brain 4D CT angiography and CT perfusion scan(CTA-CTP/ perfusion).Imaging data were retrospectively analyzed.Intracranial 4D CTA was produced by using MIP and CPR post processing.The correlation of intracranial internal carotid artery(ICA)and middle cerebral artery (MCA)stenosis with lacunar infarct or lacune was analyzed by chi-square test using IBM SPSS Statistics 22.0 software.Results The average age of 111 patients was(68.4± 6.8)years.A total of 19 phases with 6080 images were obtained by one-stop scanning.The optimal phase of artery visualization was selected from 19 phases for evaluating artery stenosis.Intracranial ICA and/or MCA stenosis were revealed in 94 patients,including 73(65.8％)patients with LI or lacune and 21 patients(18.9％)without LI or lacune.17 patients without intracranial ICA or anterior circulation of MCA stenosis included 7 patients(6.3 ％)with LI or lacune and 10 patients(9.0％)without LI or lacune.Anterior circulation vessels stenosis was positively correlated with lacunar infarction or lacune(x2 =7.794,P=0.005).94 patients with anterior circulation vessels stenosis were further divided into 2 subgroups:unilateral and bilateral stenosis.39 cases showed unilateral vessels stenosis,including 25 cases (26.6 ％) with LI or lacunein,and 14 cases (14.9 ％) without LI or lacunein.And 55 cases showed bilateral vessel stenosis,including 48 cases (51.1％)with LI or lacune,and 7 case (7.4 ％) without LI or lacune.The risk for LI or lacunein was statistically higher in bilateral vessel stenosis than in unilateral vessel stenosis(x2 =7.061,P=0.008).Patients with anterior circulation vessels stenosis combined with LI or lacune were 73 cases,including 31 cases of grade Ⅰ,19 cases of grade Ⅱ,14 cases of grade Ⅲ,and 9 cases of grade Ⅳaccording to Trial criteria(NASCET)classification,with no significant difference between the different grades of anterior circulation vessels stenosis.Conclusions A correlation between ICA or MCA stenosis and lacunar infarction or lacune may exist.Risk for lacunar infarction or lacune is higher in patients with bilateral artery stenosis than in patients with unilateral artery stenosis.