Trojan peptides,also named cell-penetrating peptides or protein transduction domains,are a class of small cationic peptides that often contains less than 30 amino acids.They can deliver a wide range of "cargos" such as peptides,proteins and nucleic acids efficiently through the cellular membrane.This review mainly focuses on the recent progress on utilizing Trojan peptides to deliver plasmid DNA and siRNA into cells in vitro and in vivo,and also highlights the implications of this technology in both gene function study and therapeutic potential.

Objective To investigate the significance of three electrocardiographic indexes in predicting the myocardial infarct related artery (IRA) in inferior wall of acute myocardial infarction (IAMI) Methods One hundred and twenty patients with IAMI were studied Results (1) IRA was related to right coronary artery (RCA) in 98 (81 7%) case, left circumflex branch (LCX) in 22 (18 3%) cases (2) ST segment depression in lead Ⅰ identified RCA occlusion with a sensitivity of 77 6%, specificity of 90 9% in patient with IAMI, but isoelectric or elevated ST segment in lead Ⅰ identified LCX occlusion with a sensitivity of 90 9%, specificity of 77 6% (3) About QRS wave of lead aVL, S/R≥1/3 identified RCA occlusion with a higher sensitivity of 93 9% and a lower specificity of 63 6% (4) When IRA was RCA, ST segment elevated amplitude Ⅲ≥Ⅱ identified as a diagnostic index no matter the location of occlusion Conclusion Three electrocardiographic indexes have significant value in predicting the infarct related artery in inferior wall acute myocardial infarction

OBJECTIVE To study the state of mixed infection of sexually transmitted diseases(STDs) pathogens isolated from female genitourinary tract and analyze the clinical meaning.METHODS Gram staining and test under microscope,DIGFA,cultivation and enzyme linked immunosorbent assay were adoptmaed to detect five pathogens such as Neisseria gonorrhoeae,Chlamydia trachomatis,Ureaplasma urealyticum,Mycoplas hominis and herpes simplex virus.RESULTS Among 2 188 female patients,we got 175 mixed infection cases,accounted for 8.0%.77.7% Patients were 21 to 40 years.CONCLUSIONS We should pay attention to monitoring STDs and control work.

Objective:To investigate the effect and mechanism of G protein-coupled receptor, class C, group 5, member A (GPRC5A) on the proliferation and apoptosis of laryngeal cancer cells (LCC).Methods:From June 2015 to December 2018, 22 patients with laryngeal cancer were selected from the People's Hospital of Xinjiang Uygur Autonomous Region. Tumor tissue samples and paracancerous tissue were collected. The expression of GPRC5A in laryngeal cancer tissues and laryngeal cancer cells was detected by real-time fluorescent quantitative polymerase chain reaction (qRT-PCR) and Western blot; pcDNA3.1-GPRC5A and control plasmid pcDNA3.1 were transfected into Hep-2 and AMC-HN-8 cells respectively. Methyl thiazolyl tetrazolium (MTT) assay was used to detect the effect of GPRC5A on the proliferation of laryngeal cancer cells; V-FITC/PI assay was used to detect the effect of GPRC5A on the apoptosis of laryngeal cancer cells; DCFH-DA was used to detect the level of reactive oxygen species (ROS) in laryngeal cancer cells; Western blot was used to detect the protein expression of vascular endothelial growth factor (VEGF), E-cadherin and vimentin in laryngeal cancer cells.Results:(1) The expression of GPRC5A in laryngeal carcinoma tissues and laryngeal carcinoma cells was lower than that in adjacent tissues and normal laryngeal epithelial cells ( P<0.05). (2) Overexpression of GPRC5A could inhibit the proliferation of laryngeal cancer cells and the expression of VEGF, E-cadherin and vimentin ( P<0.05); overexpression of GPRC5A could significantly increase the level of ROS, decrease the level of NAD + and adenosine triphosphate (ATP) ( P<0.05), increase the apoptosis rate ( P<0.05), and significantly increase the protein expression of Caspase-3 and Caspase-9 ( P<0.05). Overexpression of GPRC5A could inhibit the expression of signal transducer and activator of transcription 3/suppressor of cytokine signal transduction 3/myelocytomatosis oncogene (STAT3/SOCS3/C-MYC) pathway related proteins ( P<0.05); the expression of GPRC5A in 22 patients with laryngeal cancer were negatively correlated with STAT3 ( P<0.05). (3) STAT3 and C-MYC inhibitors significantly inhibited the expression of VEGF and E-cadherin in Hep-2 cells ( P<0.05), promoted apoptosis ( P<0.05), decreased the level of interleukin (IL)-6 in Hep-2 cells ( P<0.05), and significantly increased the level of ROS in Hep-2 cells. Conclusions:It suggests that GPRC5A inhibits proliferation and epithelial-mesenchymal transition (EMT), induces oxidative stress and apoptosis of LCC cells potentially by regulating STAT3/SOCS3/C-MYC signaling. These results provide a molecular basis for clinical treatment and diagnosis of laryngeal cancer.

OBJECTIVE To investigate the nosocomial status and drug resistance of imipenem-resistant Pseudomonas aeruginosa(IRPA) to provide the reference for doctor′s use of the antibiotics.METHODS Totally 178 strains of imipenem-resistant P.aeruginosa were identified by the routine methods.And drug sensitivity was determined by Kirby-Bauer method.RESULTS All strains of IRPA were mainly from departments of respiratory diseases,tumor and geriatrics,most of them were isolated from sputum(62.4%).The susceptibility test showed that 100.0% IRPA were resistant to imipenem.Drug resistance rates to piperacillin,cefotaxim,gentamicin,ciprofloxacin and SMZ-TMP were all over 50.0%.CONCLUSIONS The status of nosocomial infection caused by IRPA is very serious.To detect and control the infection is very important.

AIM: To study the changes of plasma atrial natriuretic peptide(ANP), endothelin-1 (ET-1) and serum cardiac troponin I(cTnI) levels and the effects of ANP and ET-1 on myocardium in crush injury rats. METHODS: Crush injury was produced in SD rats,the serum levels of cardiac enzyme and cardiac troponin I,plasma levels of ANP and ET-1 were studied by automated biochemical analyzer,automated chemiluminescence assay and radioimmunoassay. RESULTS: The plasma ET-1 level was much lower ,the levels of plasma ANP and serum cardiac enzyme and cTnI were much higher after crush injury than those of the control group( P

Objective To analyze the colonization of Candida, Rhodotorula, Penicillium and Aspergillus in skin surfaces of patients with atopic dermatitis, and to assess the relationship between the four common fungal allergens and severity of atopic dermatitis. Methods Fifty patients with atopic dermatitis and 20 healthy controls were enrolled. Scales were scraped from lesional and non?lesional skin of flexural extremities of the patients, as well as from normal skin of the flexural elbow of healthy controls, then were subjected to microscopic examination and culture. Scale specimens were inoculated onto Sabouraud dextrose agar medium and cultured at 25 ℃ in a constant temperature incubator. Subsequently, suspected fungal or yeast?like colonies were collected for pure culture. Finally, fungal strains were identified according to colony morphology, color, growth speed, as well as microscopic features of spores and hyphae. Results No hyphae or pseudohyphae were found in any case by microscopic examination. Candida albicans and Rhodotorula were detected in 29(58%)and 17(34%)out of the 50 patients, respectively, and in 5(25%)and 2 (10%) out of the 20 healthy controls, respectively. The detection rates of Candida albicans and Rhodotorula were significantly higher in the patients than in the controls(χ2=6.23, 4.10, respectively, both P<0.05). Of 25 patients with severe lesions, 19(76%)and 12(48%)were colonized by Candida albicans and Rhodotorula respectively;among 25 patients with moderate lesions, 10 (40%) and 5 (20%) were colonized by Candida albicans and Rhodotorula respectively. An increase was observed in the detection rates of Candida albicans and Rhodotorula in the patients with severe lesions compared with those with moderate lesions(χ2=6.65, 4.37, respectively, both P<0.05). There was no significant difference in the detection rate of Penicillium or Aspergillus between the patients and health controls. Conclusion The colonization rates of Candida albicans and Rhodotorula on skin surfaces were higher in patients with atopic dermatitis than in healthy controls, and higher in patients with severe lesions than in patients with moderate lesions, indicating that the types of colonizing fungi are associated with the health status of skin and severity of symptoms in patients with atopic dermatitis.

Aim To observe the effects of GCIP-27(G protein competitive inhibitory polypeptide-27) on the structure of left ventricle in spontaneously hypertensive rats(SHR).Methods Thirty SHR rats of 12 weeks old were randomly divided into five groups(n=6):blank control groups,GCIP-27(10,30,90 ?g?kg-1,ip,bid)groups,and Losartan group(6 mg?kg-1),six Wistar-Kyotos(WKY) rats were as normal control.Systolic blood pressure(SBP)was measured once per two weeks with tail-sleeve methods.At the end of the 8th week,left ventricle weight index(LVWI)were determined.Myocardium structure was observed by polaroscope and transmission electron microscope.The area and content of myocardial interstitial collagen were treated for semiquantitative analysis by image analyzer system.Results The SBP in GCIP-27(10,30,90 ?g?kg-1)groups decreased significantly from the 2 nd to the 8th week by comparison with blank control group.GCIP-27(10,30,90 ?g?kg-1) lowered heart mass index(HMI)and left ventricular mass index(LVMI)markedly compared with blank control group(P

Based on the application of the second generation field medical cabin in the practices,the author points out the advantages of it such as advanced equipment,diversified adaptation,fully equipped element,etc.Meanwhile,the author also puts forward problems and relevant suggestions in extension area,equipment configuration and accessories.The suggestion provides basic theoretical evidence for improving the medical cabin devices.

Objective To explore the expressions and clinical significance of Toll-like receptor (TLR) 3 and TLR4 in peripheral blood mononuclear cells in Henoch-Schsnlein purpura nephritis (HSPN) children.Methods According to their 24-hour urinary albumin and whether children with HSP had renal damage or not,105 cases were divided into group A,B and C.Group A were children only with HSP but without renal damage,while group B were children only with HSPN not proteinuria and group C were children with both HSPN and proteinuria.Thirty healthy children were in healthy control group(group N).Flow cytometry (FCM) and real-time PCR detected the mRNA and protein expressions of TLR3 and TLR4 in peripheral blood mononuclear cells.Results 1.The mRNA and protein expressions of TLR4 in peripheral blood mononuclear cells were significantly higher in group A,B,C than those in group N (F =37.33,24.01,all P ＜ 0.05).The mRNA and protein expressions of TLR4 in group C were much higher than those in group A and B (all P ＜ 0.05).Meanwhile,there was no significant difference between group A and B(all P ＞0.05).2.Moreover,there was a positive relationship between protein expression of TLR4 and 24-hour urinary albumin in group C(r =0.69,P ＜ 0.01).3.Expression of TLR3 was of no significant difference in all groups(F =0.86,1.78,all P ＞ 0.05).4.The expression of TLR4 mRNA had a positive correlation with protein expression of TLR4(r =0.61,P ＜ 0.0 1).Conclusions Expressions of TLR4 in peripheral blood mononuclear cells significantly increased and had a positive correlation with urinary protein excretion from HSPN in children.This implied that aberrant activation of TLR4might be relevant to the development of HSPN.