Objective To map out the binding site of P195,which is the major protein on the surface of P.falciparum merozoites,to human erythrocytes,and offer a basis for designing malaria vaccine to blockade invasion of merozoites into human erythrocytes.Methods Eight proteins derived from P195 were expressed in E.coli,and purified by Ni-chelare affinity chromatography.There after,the eight fragments and rabbit serums immunized by which were added into culture medium of P.fatciparum in vitro respectively.Twenty-four hours later,the invasion of merozoite to erythrocyte was observed.Results The antibodies which were induced by three fragments of P195,M6(Amino Acid,AA384～595),M7(AA 595～897)and M11(AA 1397～1563)could inhibit the invasion of P.falciparum merozoite into human erythrocytes.Especially,one fragment of P195,M6,had the ability to inhibit the invasion of P.falciparum merozoite into human erythrocytes.Conclusion M6,a fragment of P195 on the merozoite of P.falciparum may contain a domain thought to be involved in the recognition of human erythrocyte.The domain can be used as a candidate antigen for a malaria vaccine.

AIM:To understand the interaction between a195- kilodalton protein,P195, on the surface of Plasmodium falciparum merozoite and human erythrocyte.METHODS:P195 was expressed in eight fragments in E.coli.After being refolded,the expressed proteins were la- belled with12 5 I,and incubated with human erythrocytes.RESULTS:According to binding assay, three fragments of P195:M3,M6,M9were found to have ability to bind to human erythrocyte. M6,which is equal to amino acid( AA) sequence from384 to595,could bind to human erythro- cytes but not to trypsin treated human erythrocytes,and the binding could be eluted by low p H buffer solution. M3( AA 12 3to 30 2 ) and M9( AA 10 78to 12 51) also have the ability to bind to human erythrocytes,but the binding was not affected by trypsin treatment and low p H buffer elu- tion. CONCL USION:The binding site of M6might be a surface protein receptor of human ery- throcytes,while the binding site of M3and M9might be an intracellular componentof human ery- throcyte.

Objective To investigate the therapeutic effect of nasal endoscope surgery on chronic sinusitis and nasal polyps in geriatric patients.Methods A total of 132 geriatric patients with chronic sinusitis and nasalpolyps underwent nasal endoscope surgery in our hospital from Jun.2010 to Jun.2014,and the therapeutic effect was investigated.Results In the 132 cases,92 cases were cured (69.7％).Therapeutic effects were excellent in 33 cases (25.0％),and invalid in 7 cases (5.3％).The total effective rate was 94.7％.The total effective rate was 100.0％ in type Ⅰ,97.4％ in type Ⅱ and 84.8％ in type Ⅲ.The total effective rate was higher in type Ⅰ and Ⅱ than in type Ⅲ (x2=3.506 and 6.218,P=0.035 and 0.012).Local complications occurred in 10 cases (7.6％),including 1 case with nasolacrimal duct injury,2 cases with orbital hematoma,5 cases with nasal adhesion,1 case with surgical cavity hemorrhage and 1 case with sinus atresia.Conclusions The therapeutic effects of nasal endoscopesurgery on chronic sinusitis and nasalpolyps are good in geriatric patients,especially in treating chronic sinusitis and nasalpolyps of type Ⅰ and Ⅱ,and the postoperative complications are less,which is worth clinical application.

OBJECTIVETo observe the effect of activation of aldehyde dehydrogenase 2 (ALDH2) by ethanol on the expression of c-Jun N-terminal kinase (JNK) in the kidney of diabetic rats.

METHODSEightheen healthy male SD rats were randomly divided into 3 groups (n = 6): normal control group, diabetes group and ethanol + diabetes group. After 8 weeks, 24 h urine samples from rats were collected to detect urinary protein content. The kidney was isolated and the ratio of kidney weight/body weight (index of kidney weight) was detected. The levels of fasting blood glucose, glycosylated hemoglobin serum urea nitrogen and serum creatinine were measured. Morphological changes of renal tissue were observed by optical microscope. The protein expressions of ALDH2 and JNK in renal tissue were detected by Western blot.

RESULTSCompared with the normal control rats, the levels of fasting blood glucose, glycosylated hemoglobin, serum urea nitrogen, serum creatinine and the index of kidney weight were increased markedly in diabetic rats. The expression of ALDH2 protein was decreased, while p-JNK, JNK protein expressions and the ratio of p-JNK/JNK were increased. The morphological observation was shown that the amount of glomerular mesangial matrix were increased, basement membrane were thickened and capillary lumen were narrowed. However,in ethanol + diabetes group, renal function was improved and the damage of renal structure was attenuated. The expression of ALDH2 protein was increased, while p-JNK, JNK and the ratio of p-JNK/JNK were decreased.

CONCLUSIONEnhanced ALDH2 expression can protect kidney in diabetic rats, which may be relevant with inhibitting the activity of JNK pathway.

Aldehyde Dehydrogenase ; metabolism ; physiology ; Aldehyde Dehydrogenase, Mitochondrial ; Animals ; Diabetes Mellitus, Experimental ; enzymology ; Ethanol ; pharmacology ; JNK Mitogen-Activated Protein Kinases ; metabolism ; Kidney ; enzymology ; Male ; Mitochondrial Proteins ; metabolism ; physiology ; Rats ; Rats, Sprague-Dawley

Background The pathogenesis of primary open angle glaucoma(POAG) and high myopia are very complex.To construct the regulatory network of virulence genes and relevant genes that involved in pathogenicity are helpful for reveal of the pathogenesis.Objective The aim of this study was to investigate myocilin(Myoc),a gene that contributes to POAG and high myopia in eyes of BXD Recombinant Inbred(BXD RI)mice and construct the regulatory network of Myoc.Methods The affymetrix microarray system was used to detect the differential expression of Myoc in the eyes of C57BL/6J(B6),DBA/2J(D2) and BXD RI mice.Expression quantitative trait loci (eQTL) mapping was performed to construct the regulatory network of Myoc gene.Results The average expression level of the Myoc gene in the BXD strains was 10.83,and the gene exhibited expression levels ranging from 8.39 in BXD55 mice tol 1.43 in B6 mice.The eQTL mapping for the Myoc gene showed a significant likelihood ratio statistic (LRS) of 21.78.The QTL was mapped in chromosome 2,and Myoc was located on chromosome 1,indicating that the Myoc gene was a trans-acting QTL.Olfml2a was identified to be a candidate upstream gene of Myoc by analysis of bioinformatics.Genetic regulatory network analysis demonstrated that a series of genes associated with Myoc probably played roles in the pathogenesis and development of POAG and high myopia.Conclusions The genetical genomics approach provides a powerful tool for constructing pathways that contribute to complex traits,such as POAG and high myopia.

?AIM: To study the association of the single nucleotide polymorphism ( SNP) rs1157699 in the calcitonin receptor-like receptor ( CRLR ) gene with primary angle closure ( PAC) in a Han Chinese population.?METHODS: All samples, involved 232 PAC cases and 306 controls, were obtained from an epidemiologic survey conducted in Funing, Jiangsu Province, China. Genotyping were carried out by TaqMan-MGB probe using the real time quantitative polymerase chain reaction system to study the relationship between SNP of rs1157699 in CRLR gene and PAC.?RESULTS: The prevalence of CRLRrs1157699 genotype was 67.4%, 30.0%, 2.6% for CC, CT, TT in cases, and 71.3%, 27.0%, 1.7% in controls respectively.There was no difference between the two groups in the distribution of genotype and allele frequencies of rs1157699 (P>0.05).?CONCLUSION:Our results do not support a significant role for rs1157699 in CRLR with PAC.

Objective To explore the variance of plasma brain natriuretic peptide (BNP) concentrations in the aged patients after noncardiac surgery and its significance. Methods 101 patients undergoing elective noncardiac surgery were divided into two groups based on the BNP concentrations before surgery: group A: BNP≤100 ng/L，n=61; group B: BNP>100 ng/L，n=40. The BNP concentrations before and after noncardiac surgery and the incidence of cardiac events in both groups were compared. Results There was no significant difference （P>0.05） of BNP concentrations before and after noncardiac surgery in group A, which were (58.2±28.7) ng/L and (53.7±25.9) ng/L respectively, but was significant difference （P<0.05） in group B, which were (147.3±72.1) ng/L and (341.5±92.4) ng/L respectively. There was significant difference （P<0.05） between group A, in which no patient happened cardiac event, and group B, in which 14 patients happened. Conclusion The plasma BNP concentration would be increased significantly in the aged patients with a BNP concentration>100 ng/L before surgery, which may cause more cardiac events.

Humans ; Sinus of Valsalva ; Death, Sudden, Cardiac/etiology* ; Coronary Stenosis/complications*

Objective Laryngeal and upper esophageal foreign bodies are common diseases, we explored a new and simple method to remove these foreign bodies. Methods The clinical data of 177 patients with laryngeal and upper esophageal foreign bodies from June 2008 to January 2016 were analyzed retrospectively. We used two methods to treat these foreign bodies:130 foreign bodies were directly removed under video endoscopy;47 foreign bodies were removed with suspension laryngoscopy, and video endoscopy was used meanwhile. Result 177 laryngeal and upper esophageal foreign bodies were removed well, without severe complications like esophageal perforation or phyryngeal fistula. Conclusion Removing esophageal and laryngeal foreign bodies with video endoscopy is simple, safe and effective.

Objective To evaluate the protective effect of aminophylline on myocardium in the patients undergoing prothetic valve replacement operation of heart.Mothods Thirty patients undergoing prothetic valve replacement operation of heart were randomized to be treated either with aminophylline(n=15)or without aminophylline treatment(n=15). Aminophylline(5mg/kg)was injected intravenously at 15 minutes after induction of anesthesia.Cardiac troponin I(cTnI), cyclic adenosine monophosphate(cAMP),myeloperoxidase(MPO),ratio of aortic blood neutrophil count to coronary vein sinus blood neutrophil count,hemodynamics,time of aortic cress-clamping and other clinical data were recorded during the operation.Results There were no differences between the two groups in the major perioperative variables.Plasm cTnI concentration in both groups increased after off-clamping than that before CPB,however,it was lower in aminophylline group than that in control group.Concentration of cAMP in both groups after off-clamping was lower than that before CPB, however cAMP concentration in aminophylline group after off-clamping was higher than that in control group.Myocardial MPO activity and neutrophil count ratio after aortic off-clamping in aminophylline group was significantly lower than that in control group.Conclusion These results suggest that aminophylline is helpful to unprotection of myocardial and decreases the sequestration of neutrophil in myocardium.The mechanism of the protection may be related to the cAMP increased in myocardium.