Objective To investigate the radioprotection and management of yttrium-90 resin microsphere therapy based on the survey and monitoring of treatment institutions in Guangdong Province, China, and to provide technical reference and basis for the subsequent radiation management of this therapy. Methods Based on the technical data on yttrium-90 resin microsphere therapy collected from both domestic and international sources, an investigation was conducted on some yttrium-90 resin microsphere treatment institutions in Guangdong Province. Radiation level monitoring was carried out in the radioactive workplaces of three hospitals that had conducted yttrium-90 resin microspheres therapy. Environmental X-γ dose rate meters were used for detecting radiation dose equivalent rates, while α and β surface contamination monitors were used for detecting radioactive surface contamination. Additionally, urine samples from two patients were collected within 24 hours post-operation, and total radioactivity was analyzed using low-background α and β counters. Results During the yttrium-90 resin microsphere therapy, the radiation dose equivalent rates around the digital subtraction angiography rooms in the three hospitals ranged from 0.15 to 0.26 μSv/h, and the radiation dose equivalent rates around the observation wards ranged from 0.17 to 0.69 μSv/h. The β radioactive surface contamination values in the workplace control zones ranged from ＜0.07 to 18.7 Bq/cm², while the values in the supervised zones were all less than 0.07 Bq/cm². The total β radioactivity in the urine of the two patients within 24 hours post-operation accounted for approximately 0.0010% to 0.0013% of the yttrium-90 infusion dose. Conclusion The radiation levels at the monitoring sites in the workplaces of the three hospitals are below the national standard limits. The radioprotection and management of yttrium-90 resin microsphere therapy in the three hospitals in Guangdong Province are satisfactory.

Objective To investigate the radioprotection and management of yttrium-90 resin microsphere therapy based on the survey and monitoring of treatment institutions in Guangdong Province, China, and to provide technical reference and basis for the subsequent radiation management of this therapy. Methods Based on the technical data on yttrium-90 resin microsphere therapy collected from both domestic and international sources, an investigation was conducted on some yttrium-90 resin microsphere treatment institutions in Guangdong Province. Radiation level monitoring was carried out in the radioactive workplaces of three hospitals that had conducted yttrium-90 resin microspheres therapy. Environmental X-γ dose rate meters were used for detecting radiation dose equivalent rates, while α and β surface contamination monitors were used for detecting radioactive surface contamination. Additionally, urine samples from two patients were collected within 24 hours post-operation, and total radioactivity was analyzed using low-background α and β counters. Results During the yttrium-90 resin microsphere therapy, the radiation dose equivalent rates around the digital subtraction angiography rooms in the three hospitals ranged from 0.15 to 0.26 μSv/h, and the radiation dose equivalent rates around the observation wards ranged from 0.17 to 0.69 μSv/h. The β radioactive surface contamination values in the workplace control zones ranged from ＜0.07 to 18.7 Bq/cm², while the values in the supervised zones were all less than 0.07 Bq/cm². The total β radioactivity in the urine of the two patients within 24 hours post-operation accounted for approximately 0.0010% to 0.0013% of the yttrium-90 infusion dose. Conclusion The radiation levels at the monitoring sites in the workplaces of the three hospitals are below the national standard limits. The radioprotection and management of yttrium-90 resin microsphere therapy in the three hospitals in Guangdong Province are satisfactory.

Objective:Through the analysis of the evaluation index system of the major rankings of universities and hospitals, this paper aims to provide a reference for the discipline construction of affiliated hospitals in universities.Methods:This paper comprehensively analyzes and compares the evaluation objectives and indicators of the five major rankings of universities and the three major rankings of hospitals in China and abroad.Results:Each main rankings have its own characteristics that both positive and with possible limitations.Conclusions:Hospital management departments can refer certain indicators in order to identify possible gaps of the hospital discipline development. Also, tailored corresponding measurements for discipline development can be developed in combination with real-needs.

Background: In suckling piglets, transmissible gastroenteritis virus (TGEV) causes lethal diarrhea accompanied by high infection and mortality rates, leading to considerable economic losses. This study explored methods of preventing or inhibiting their production.Bovine antimicrobial peptide-13 (APB-13) has antibacterial, antiviral, and immune functions. Objectives: This study analyzed the efficacy of APB-13 against TGEV through in vivo and in vitro experiments. Methods: The effects of APB-13 toxicity and virus inhibition rate on swine testicular (ST) cells were detected using 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT). The impact of APB-13 on virus replication was examined through the 50% tissue culture infective dose (TCID50 ). The mRNA and protein levels were investigated by real-time quantitative polymerase chain reaction and western blot (WB). Tissue sections were used to detect intestinal morphological development. Results: The safe and effective concentration range of APB-13 on ST cells ranged from 0 to 62.5 µg/mL, and the highest viral inhibitory rate of APB-13 was 74.1%. The log10 TCID50 of 62.5 µg/mL APB-13 was 3.63 lower than that of the virus control. The mRNA and protein expression at 62.5 µg/mL APB-13 was significantly lower than that of the virus control at 24 hpi. Piglets in the APB-13 group showed significantly lower viral shedding than that in the virus control group, and the pathological tissue sections of the jejunum morphology revealed significant differences between the groups. Conclusions APB-13 exhibited good antiviral effects on TGEV invivo and in vitro.

Objective:To investigate the journals and research directions of SCI papers published by the first affiliated hospital of Sun Yat-sen university from 2007 to 2016. To further study the trend of published journals, as well as the relationship between the research directions and departments.Methods:According to the data from Institute of Scientific and Technical Information of China and the Web of Science, SCI papers of our hospital from 2007 to 2016 were searched and collected, detailed information on published journals and research directions of the papers were analyzed.Results:From 2007 to 2016, scientists of our hospital published 2 999 SCI papers in 897 kinds of journals in total, among which almost 60% papers were published in 166 kinds of journals. PLoS One published the largest number, counted as 125 papers. There were 16 kinds of journals with impact factor (IF)> 10, published 25 papers from 12 departments. A total number of 76 research directions were involved in all these papers, and the largest number of papers was in oncology, accounted for 10.3%. There were 1 647 papers in the top 10 research directions, accounted for 54.92%. Among the 76 research directions, 62 research directions involved more than 2 departments.Conclusions:The distribution of SCI journals published by the first affiliated hospital of Sun Yat-sen university is centralized, with few high-impact achievements. Interdisciplinary research is common and widespread, but the degree of concentration is not enough.

Objective This paper aimed to discuss the construction strategy to promote research integrity in medical science from the perspective of hospital research administrators,and to provide theoretical basis for fulfilling the national strategic requirement of implementing "Scientific research integrity construction ".Methods Analyze and summarize the connotation,manifestations,causes and countermeasures of research integrity and research misconduct.Results The misconduct in medical scientific research occurred in various aspects,including scientific research projects,research papers,scientific achievements and other different stages.Behind reasons include weak sense of research integrity,lack of moral integrity education and training,improper academic evaluation system,lack of sound supervision,reward and punishment mechanism,etc.Conclusions A lot of strategies could adopted to promote the construction of research integrity and development of medical scientific research,for instance,strengthening scientific research integrity education,establishing a multi-dimensional evaluation system,improving the supervision,reward and punishment mechanism of scientific research integrity,as well as promote a better scientific research atmosphere.

Objective This article conducted the statistical analysis of SCI papers published during 2013-2017 at the first affiliated hospital of Sun Yat-sen university ,to understand the SCI paper outcomes as to provide reference for future policy making and research administration development .Methods We analyzed the SCI papers published by the First Affiliated Hos-pital of Sun Yat-sen University from 2013 to 2017 ."Article" and"Review" type SCI papers published by the hospital as the first completion unit were statistically analyzed from the aspects of quantity ,impact factors ,journals and discipline distribu-tion .Results A total of 2268 SCI papers were published in 5 years ,distributed in 1162 journals .The quantity and the average impact factor both increased year by year ,but mainly concentrated in traditional dominant disciplines .Conclusions The SCI papers were increasing annually since 2013 .However ,we still need to improve the quantity and quality of high-level articles ,to promote the development of disciplines ,to strengthen the construction of public experimental platforms ,to continue building talent teams ,to improve the reward and evaluation system ,and to further enhance the overall scientific research level of the hospital .

Objective To evaluate the outcomes of thumb reconstruction with dorsal thumb rotated single pedicel reverse island flap.Methods 49 thumb-tip defects cases with dorsal thumb rotated single pedicel reverse island flap were analyzed retrospectively.37 dorsal thumb reverse island flap were performed,and 12 ulnar-dorsal reverse island flaps were performed.Results The operation time was 40-60 minutes.The mean time was 45 minutes.All 49 cases survived completely.The color of the flaps was purple,and blisters in the surface of the flaps after 1-2 days in 2 cases.After took out stitches partly,the blisters were dried and crusted,the color of the flaps with better blood circulation was normal.The follow-up period was 3-24 months,all thumbs had satisfactory appearances and functions.The two-point discrimination was 6-9mm in flaps inosculated with nerve,that was 8-10 mm in flaps inosculated without nerve.The color,texture and elasticity of flaps were excellent,and the donor sites had not been defected.Conclusion Dorsal thumb rotated single pedicel reverse island flap is a reliable option to restore function as well as appearance,long vascular pedicle with skin strap,wide rotation angle,high rate of survival.It avoided damages to the well-known arteries and nerves.It is a relatively facile procedure that can be applied toward resurfacing thumb tip defects.

BACKGROUND:Recently, glucocorticoid-induced necrosis of femoral head has been much studied. However, the precise Wnt signaling pathway by which puerarin suppresses adipogenic differentiation of glucocorticoid-induced bone marrow mesenchymal stem cells adipogenic differentiation of glucocorticoid-induced bone marrow mesenchymal stem cells remains unconfirmed. OBJECTIVE:To investigate the expression of Wnt signaling pathway related genes and the key factor protein,β-catenin, during adipogenic differentiation of glucocorticoid-induced rat bone marrow mesenchymal stem cells treated by puerarin. METHODS:The third generation of bone marrow mesenchymal stem cells were cultured with Dulbecco’s modified Eagle’s medium containing blank serum (blank control group), dexamethasone (hormone group), dexamethasone with puerarin low dose group, the middle dose group and high dose group. After 6 days of culture, in the above five groups, the expressions of Wnt/β-catenin signaling pathway members, Wnt10b mRNA, GSK3βmRNA,β-catenin mRNA, were detected using RT-PCR assay, and the expression ofβ-catenin protein was detected using western blot assay.
RESULTS AND CONCLUSION:Compared with the control group, the Wnt10b mRNA,β-catenin mRNA andβ-catenin protein expressions were significantly higher in puerarin groups, but GSK3βmRNA expression was significantly lower in the puerarin groups. These findings suggest that puerarin effects on inhibition of adipogenic differentiation of glucocorticoid-induced bone marrow mesenchymal stem cells probably are realized through the activation of Wnt/β-catenin signal pathway and regulation of the key factor Wnt10b mRNA, GSK3βmRNA,β-catenin mRNA, andβ-catenin protein expressions. The mechanism by which puerarin prevents glucocorticoid-induced necrosis of femoral head not only improves local microcirculation of the femoral head, but also relates to its inhibitory effects on adipogenic differentiation of glucocorticoid-induced bone marrow mesenchymal stem cells.

Objective To observe the expression of the IGF-1 on the auditory cortex as well as the hippo-campus of rats which underwent longterm exposure to white noise to explore its effects for the repairment of the noise induced damage in the central nervous system.Methods 16 healthy Wistar rats were randomly grouped as chronic noise exposure group(group A)which underwent the longterm noise exposure(100 dB SPL white noise,4 hours per day for 28 days)and control group(group B).The expression of IGF-1 both on the auditory cortex and hippocampus was measured and the ABR waveforms were recorded.ResuIts Compared with the group A,the num-ber of IGF-1 positive neurons as well as the expression of IGF-1 both in the auditory cortex and the hippocampus of the group B increased(P<0.05),the ABR threshold was significantly higher(P<0.05 )after long-term noise exposure.ConcIusion Chronic noise exposure induced the changes of the IGF-1 system which may play a part in the protection for the noise-induced damage of the central nervous system.