Objective:To screen the optimal formula and technology of demethoxycurcumin nano-structured lipid carriers. Meth-ods:The encapsulation efficiency as the main investigation index, the single factor exploration and orthogonal design were used to study the main factors affecting the quality of the nanoparticles. The optimal formula and technology were obtained. Results:The optimized parameters were as follows:the ratio of drug to lipid materials was 1 ∶40, the ratio of liquid lipid to total lipid materials was 10%, the amount of surfactants was 4% and the amount of lecithin was 2%. The prepared nanoparticles were spheric and regular. The size dis-tribution of the nanoparticles was narrow with the average particle size of 110nm and PDI of 0. 199. Conclusion:The optimized formula and technology of demethoxycurcumin nano-structured lipid carriers are stable and practicable,which provide reference for the further research of demethoxycurcumin.

Hedyotis diffusa is an antioxidant, antibacterial Chinese herbal medicine which has anti-tumor, antioxidant, antibacterial, enhance the effect of nonspecific immunity and protection of the nervous system. Clinical application shows thatHedyotis diffusa has good efficacy on treatment of malignant tumors and inflammatory diseases. Referred to some papers published at home and abroad, this paper summarized from the aspects of active ingredient and antitumor effect. Results showes that its anti-tumor effect exactly, anti-tumor mechanism may be associated with a variety of molecular mechanisms, which remains to be further in-depth study.

Objective To analyze the protein expression profile of HeLa cells transfected with pORF5 gene of Chlamydia trachomatis. Methods A lentiviral expression vector containing pORF5 gene was constructed. The lentiviral expression vector and helper plasmids were co-transfected into 293T cells to construct the recombinant lentivirus, which was used to infect HeLa cells. HeLa cells transfected with pORF5 gene and control HeLa cells were sorted out by flow cytometry. The isobaric tags for relative and absolute quantitation ( iTRAQ) approach combined with nano-liquid chromatography-tandem mass spec-trometry ( NanoLC-MS/MS) analysis was performed to understand protein expression profiles and to iden-tify and quantify the differentially expressed proteins in the pORF5-transfected HeLa cells ( pORF5-Hela) and the control HeLa cells. Quantitative real-time PCR ( qRT-PCR ) and Western blot analysis were performed to detect the expression of some proteins at mRNA and protein levels, respectively. Results HeLa cell line stably transfected with pORF5 gene and control HeLa cell line were constructed successful-ly. Totally 314 proteins were differentially expressed between the pORF5-HeLa and control HeLa cells, 159 of which showed increased expression and the other 155 showed decreased expression in pORF5-HeLa cells. The differentially expressed proteins were involved in many processes, such as metabolic process, immune response, biological adhesion and so on. Results of qRT-PCR showed that the expression of HIST1H1C(histone H1. 2C), HBA1(hemoglobin subunit alpha), PARK7(parkinson disease protein 7), HMGB1(high mobility group protein B1) and HMGB2 at mRNA level in pORF5-HeLa cells were up-regulated, while the expression of CLIC1 ( chloride intracellular channel protein 1 ) , KRT7 ( typeⅡ cy-toskeletal 7), SFN(14-3-3 protein sigma) and CDKN2A(cyclin-dependent kinase inhibitor 2A) were down-regulated. Western blot analysis confirmed the enhanced expression of HMGB1 and PRAK7 at pro-tein level. The results of qRT-PCR and Western blot analysis were consistent with proteomic data. Con-clusion Expression profiles for differentially expressed proteins between pORF5-HeLa and control HeLa cells were established successfully. The differentially expressed proteins regulated by pORF5 gene were found to be related to cell metabolism, proliferation, adhesion and so on, suggesting that pORF5 might promote the growth and proliferation of Ct by regulating protein expression and biological behavior of host cells.

Magnetic resonance imaging (MRI) simulator (MRI-Sim) can provide superior images for radiotherapy.Due to the complexity of MRI technology and the safety problem caused by strong magnetic field, the acquisition and implementation of MRI simulation is more complicated than CT simulation.In order to ensure the introduction of MRI-Sim, this paper reviews the selection, installation, and acceptance test of MRI-Sim, including the selection of host and auxiliary equipment, installation site preparation, and safety precautions,as well as MRI-Sim acceptance test and commissioning.

Objective:To investigate whether pORF5 plasmid protein of Chlamydia trachomatis(Ct) induces 1L-1βand 1L-18 production in THP-1 cells,and its potential molecular mechanism.Methods:pORF5 plasmid protein was used to stimulate THP-1 cells at different concentrations(0,3,6,12,24,36 μg/ml),then the inflammatory cytokines IL-18 and IL-1βwere detected by ELISA at the time of 0,8,16,24,36 h;The mRNA expression of NALP3 inflammasome were detected by Realtime-PCR,and Caspase-1 activity was determined by Western blot analysis.THP-1 cells were transfected with siRNA targeting NALP3 and ASC gene for 24 h or pretreated with Caspase-1 inhibitor(Z-YVAD-FMK) for 30 min,and subsequently stimulated with pORF5(24 μg/ml) for 24 h,then secretion of IL-1βand IL-18 were analyzed by ELISA.Results: The pORF5 plasmid protein induced THP-1 cells to secrete IL-1βand IL-18 by dose-and time-dependent manners,production of IL-1βand IL-18 reached their peaks(491 pg/ml and 186 pg/ml) at concentration of 24 μg/ml,and the peak amount of IL-1βand IL-18 occurred at 24 h and 16 h post-stimulation respectively.pORF5 plasmid protein in-creased mRNA expression of NALP3 inflammasome and activated Caspase-1 in THP-1 cells.NALP3 siRNA,ASC siRNA and Z-YVAD-FMK reduced pORF5-induced IL-1βand IL-18 production when compared with control groups(P<0.05).Conclusion:pORF5 plasmid protein could induce THP-1 cells to produce IL-1βand IL-18 through NALP3 inflammasome activation,which may play an important role in the pathogenesis in Ct infection.

Objective In view of the trend of networking development in modern high education and the characteristics of students' strong self-learning ability, Peking Union Medical College established a multimedia morphological teaching website from 2013 including human anatomy, neuroanatomy, histology and embryology.Methods According to the teaching demand, the use of the ASP script, combined with Mysql database completed the website development, from the interface design to the curriculum, the syllabus, presentations and laboratory videos uploading.Results Through the questionnaire survey, 45% of the students use website more than 3 times a week, and course content column has the highest use frequency (79%).An independent learning platform effect has been achieved.Conclusions After nearly 4 years exploration and practice, multimedia website has become an important part of morphological courses, as a kind of new teaching mode, not only popular for college teachers and students, but also widely used in clinical teaching.

Objective:To investigate and analyze the current situation and influencing factors of professional decision-making self-efficacy of male nurses.Methods:Convenience sampling was used to select 133 male nurses from September to October 2020 in Shenzhen City as the research objects. The Self-efficacy Scale for Career Decision-making was used to conduct self-evaluation, career information collection, career goal selection, career planning formulation, and job-selection problem resolution.Results:Attitudes towards nursing majors, academic qualifications, reasons for applying for nursing majors, monthly family income, whether it is an only child, family residence, work status, number of job changes, mother′s education level, and married or not were the factors that affect male nurses′ professional self-efficacy ( t values were -1.989-12.523, F values were 7.476-325.316, P<0.05 or 0.01). Conclusion:Career decision-making self-efficacy has a good guiding role in the career selection, development and planning of male nurses. Medical units should formulate reasonable training methods or related training for new male nurses entering the clinic, so as to increase male nurses′ recognition of their occupations, thereby enhancing them Career decision-making self-efficacy.

The signaling pathways involved in acupuncture intervention in post-stroke depression (PSD) mainly include cAMP signaling pathway, MAPK signaling pathway, PI3K/Akt/mTOR signaling pathway, NF-κB signaling pathway, CREB signaling pathway, and CaMK signaling pathway. A variety of regulatory networks are formed between these signaling pathways, which play a key role in reducing inflammation, inhibiting apoptosis, improving neuroplasticity, promoting angiogenesis, and protecting neurons.

OBJECTIVE: To explore the pathogenesis of two fetuses from one family affected with Joubert syndrome (JS). METHODS: Whole exome sequencing was employed to screen potential mutations in both fetuses. Suspected mutations were verified by Sanger sequencing. Impact of intronic mutations on DNA transcription was validated by cDNA analysis. RESULTS: Two novel TCTN1 mutations, c.342-8A>G and c.1494+1G>A, were identified in exons 2 and 12, respectively.cDNA analysis confirmed the pathogenic nature of both mutations with interference of normal splicing resulting in production of truncated proteins. CONCLUSION The genetic etiology of the family affected with JS has been identified.Above findings have enriched the mutation spectrum of TCTN1gene and facilitated understanding of the genotype-phenotype correlation of JS.
Abnormalities, Multiple ; diagnosis ; genetics ; Cerebellum ; abnormalities ; Eye Abnormalities ; diagnosis ; genetics ; Humans ; Kidney Diseases, Cystic ; diagnosis ; genetics ; Membrane Proteins ; genetics ; Mutation ; Pedigree ; Retina ; abnormalities ; Whole Exome Sequencing

OBJECTIVE: To screen proteins interacting with ring finger protein 216(RNF216) through yeast two hybrid experiment, and further clarify the role of RNF216 in the pathogenesis of gonadotropin-releasing hormone deficiency. METHODS: A recombinant expression vector pGBKT7-RNF216 was constructed and transformed into yeast Y2HGold, which was hybridized with a human cDNA library in order to screen proteins interacting with RNF216. The interaction was verified in yeast Y2HGold. RESULTS: A recombinant expression vector pGBKT7-RNF216 was successfully constructed and expressed in yeast Y2HGold. Filamin B (FLNB) was identified by yeast two hybrid experiment, and their interaction was verified in yeast Y2HGold. CONCLUSION An interaction between FLNB and RNF216 was identified through yeast two hybrid experiment. RNF216 may affect the proliferation and migration of GnRH neurons by regulating FLNB or FLNB/FLNA heterodimers.
Gene Library ; Gonadotropin-Releasing Hormone/genetics* ; Humans ; Proteins ; Two-Hybrid System Techniques ; Ubiquitin-Protein Ligases/genetics*