RESUMEN
Stapled peptides with significantly enhanced pharmacological profiles have emerged as promising therapeutic molecules due to their remarkable resistance to proteolysis and performance to penetrate cells. The all-hydrocarbon peptide stapling technique has already widely adopted with great success, yielding numerous potent peptide-based molecules. Based on our prior efforts, we conceived and prepared a double-stapled peptide in this study, termed FRNC-1, which effectively attenuated the bone resorption capacity of mature osteoclasts in vitro through specific inhibition of phosphorylated GSK-3β. The double-stapled peptide FRNC-1 displayed notably improved helical contents and resistance to proteolysis than its linear form. Additionally, FRNC-1 effectively prevented osteoclast activation and improved bone density for ovariectomized (OVX) mice after intravenous injection and importantly, after oral (intragastric) administration. The double-stapled peptide FRNC-1 is the first orally effective peptide that has been validated to date as a therapeutic candidate for postmenopausal osteoporosis (PMOP).
RESUMEN
Objective:To discuss the practice and application of "artificial intelligence + big data" in the construction of thoracic surgery golden course.Methods:The intern students of the Department of Thoracic Surgery in Harbin Medical University Cancer Hospital were selected as the research objects, and they were randomly divided into 2 groups with 36 cases in each group. The control group was taught with regular courses, and the observation group was taught by the golden course system under "artificial intelligence + big data". After the course, self-made assessment forms were used to assess the academic performance (theoretical knowledge assessment results and skill operation assessment results) of the two groups of medical students. The excellent and good rate of knowledge mastery and the mastery of clinical operation techniques were scored by the teachers, and the evaluation was made from the aspects of learning attitude, the mastery degree of theoretical knowledge and clinical operational techniques, etc. In addition, self-made innovative thinking ability scale was used to assess the medical students. SPSS 22.0 was used for independent samples t test and chi-square test. Results:There was no statistically significant difference between the two groups of theoretical knowledge assessment scores and skill operation assessment scores before the teaching; after the course, the theoretical knowledge assessment scores and skill operation assessment scores of the control group were higher than those before the teaching, with statistically significant differences ( t=5.37, 4.17, P<0.05). After the course, the theoretical knowledge assessment scores and skill operation assessment scores of the observation group were higher than those before the teaching, with significant differences ( t=10.93, 8.24, P<0.05). The results of theoretical knowledge assessment and skill operation assessment in the observation group were significantly higher than those in the control group after the course ( t=7.10, 5.77, P<0.05). In the control group, 17 cases were excellent in knowledge mastery, accounting for 47.22%, and the rate of knowledge mastery was 83.33% (30/36); in the observation group, 26 cases were excellent in knowledge mastery, accounting for 72.22%, and the excellent and good rate of knowledge mastery was 100% (36/36), and the difference was statistically significant ( χ2=4.55, P=0.033). After the course, the innovative thinking ability of the control group was higher than that before the teaching, the innovative thinking ability of the observation group was higher than that before the teaching, and the innovative thinking ability of the observation group was higher than that of the control group, and the difference was statistically significant ( t=7.07, P<0.001). Conclusion:The use of the "artificial intelligence + big data" golden course to build a teaching system can improve the academic performance, knowledge mastery and innovative thinking ability of medical students.
RESUMEN
Objective To evaluate the value of utility of bronchoscopy in human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) patients with Bacteria sputum negative pulmonary tuberculosis.Methods Bronchoscopy was conducted to 65 AIDS patients with bacteria sputum negative pulmonary tuberculosis in the first hospital of Changsha. The patients’ bronchoalveolar lavage fluid through the electronic bronchoscopy, mycobacterium tuberculosis (MTB) culture, brushings and biopsy pathology were analyzed.Results 65 cases, bronchoscope alveolar lavage lfuid smear positive acid-fast stain 14 cases (21.54%), BAL mycobacterium tuberculosis culture positive 20 cases (30.76%), a bronchoscope brush positive 24 cases (36.92%), 35 cases of bronchoscopy biopsy, according to the performance under the bronchoscope positive 21 cases (60.00%), bronchoscopy combined different methods conifrmed 43 cases (66.15%).Conclusions Bronchoscopy in AIDS with bacteria sputum negative pulmonary tuberculosis diagnosis, it has important application value.
RESUMEN
OBJECTIVE@#To test the association of K469E, the common intercellular adhesion molecule-1 (ICAM-1) polymorphism with chronic obstructive pulmonary disease (COPD) and expression of ICAM-1 in Han people of Central and South Region in China.@*METHODS@#A case-control study was done on 91 patients with COPD and 80 matched controls of Han people from central and south region in China, mainly from Hunan Province. Genomic DNA was extracted from white blood cells. ICAM-1 sequences were amplified by PCRand analyzed by agarose gel electrophoresis. Genotypes were defined by base sequencing. In addition, soluable intercellular adhesion molecule-1 (sICAM-1) serum levels were measured in 86 people picked out randomly from the COPD group and the control group.@*RESULTS@#There was no difference in the frequency of the genotype and allele between the COPD group and the controls, but compared with those who were not very severe, the frequency of KE/ EE genotypes and E allele in COPD patients at very severe stage was significantly higher (10/16 vs 26/75, 12/30 vs 20/150, P0.05).@*CONCLUSION@#K469E polymorphism of ICAM-1 may not affect the susceptibility of COPD and the expression of ICAM-1 in Han people from central and south of China in this study, but carriers of E allele are at high risk of developing severe stage of COPD.