Objective To investigate the expressions of FSH receptor mRNA and protein in ovary tissue in rats with letrozole-induced polycystic ovary syndrome(PCOS),and to provide experimental data for the model application. Methods Forty rats were randomly divided into two groups(n=20),in PCOS model group letrozole was administered once daily during 21 d,and in control group without any treatment.The gonadal hormone concentrations in serum were determined by radioimmunoassay,the histologic changes in ovaries were observed by HE staining,the expression of FSH receptor gene in ovary tissue was detected by realtime -PCR,Western blotting and immunohistochemistry.Results Compared with control group,estradiol(E2) and progesterone in model group showed a considerable reduction(P0.05).Compared with control group,the ovaries from model group showed high incidence of subcapsular ovarian cyst and capsular thickening and decreased number of corpora lutea.The expressions of FSH receptor mRNA and protein were significantly higher in model group than those in control group(P

Objective To reduce unreasonable use of antibiotics in acute suppurative tonsillitis cases. Methods Retrospective analyses of 1107 acute suppurative tonsillitis cases from the pediatric outpatient department were conducted.According to course of antibiotic treatment, these cases were divided into the group of full course of treatment and the group of insufficient course of treatment.According to the types of antibiotic, the subjects were di-vided into azithromycin group and non-azithromycin group.Three months after the onset of illness, the occurrence of complications and illness relapse between full course of treatment group and insufficient course group, azithromycin group and non-azithromycin group were analyzed.Meanwhile, the cases were divided into Chinese mainland group, Macao and Taiwan group, and foreign group according to their native places and nationalities.We compared the num-ber of cases used insufficient course in these three groups and analyzed their reasons.Results The relapse rate was significantly lower in the full course treatment group compared with insufficient course treatment group ( P<0.05 ) , and significantly higher in non-azithromycin group compared with azithromycin group ( P<0.05 ) .The occurrence rate of insufficient course treatment in the Chinese mainland group was obviously higher than the Macao group, Tai-wan group and foreign group (P<0.05).The main reasons for insufficient course of treatment were the insufficient patients′obedience and some doctors′poor understanding of the disease course.Conclusion A full course treatment with antibiotics on acute suppurative tonsillitis are strongly suggested.It may be of great significant to strengthen the awareness of reasonable use of antibiotics among the inland citizens.

To foster interdisciplinary talents with the highly fusion of clinical skills and the capacity for scientific research, a preliminary exploration of teaching for the cultivation of scientific innovation ability was carried out for clinical postgraduate students. In the cultivation of clinical post-graduate students' innovation consciousness and innovative spirit, we focused on the transformation of attaching more importance to the clinical skills than to the capacity for scientific research to establish the foundation of the competitive compound talents. Then in the early stage of medical project writing, basic knowledge learning and exchange, we stressed clinical postgraduate students' solid grasp of basic knowledge of medical science to consolidate the way of enhancing the scientific research ability. Furthermore , under the guidance of the second research supervisors allocated by the department , we strengthened the clinical postgraduate students' writing of scientific research project bid and pro-fessional paper to promote the organic combination of the clinical practice and scientific research innovation and enhance their scientific research ability.

Acute lymphoblastic leukemia (ALL) is a heterogeneous disease affected by patient' s age,immunologic subtype,genetic and molecular features.In the 54th ASH annual meeting,lots of new discoveries about the biology,prognosis and treatment of ALL were reported.Here highlights of genomic profiling,new targeted therapy and hematopoietic stem cell transplantation for ALL presented in this meeting are introduced.

Objective To evaluate whether second-look endoscopy could prevent endoscopic submucosal dissection complicated with delayed bleeding and to clarify what kind of lesions that need second-look endoscopy. Methods 98 patients with early gastric cancer by histological diagnosis from Oct. 2014 to Sep. 2016 were included in this study. Mucosal damage related bleeding within 24 h after ESD was considered delayed bleeding. Clinical data of patients, lesions, surgical factors, and the incidences of bleeding before and after the second endoscopy examination were retrospectively studied. Results The en bloc resection rate of 98 patients was 100.0%, and all incisal margins were negative. No gastrointestinal perforation, death or severe complications occurred. 5.1%of the patients (5/98) occurred delayed bleeding after ESD and had been successfully stopped in a second-look endoscopy, and none received operations. No delayed bleeding occurred in follow-ups of patients with negative delayed bleeding. 40.0 % of the patients (2/5) with delayed bleeding received blood transfusion. The median time of second-look endoscopy after ESD was the second day after operation (1 ~ 3 d). The median bleeding time of 5 patients with delayed bleeding after ESD was the first day after operation (1 ~ 10 d). The median duration of surgery was 75 min (60~150 min), and the prediction success rate was 94.9 %. The results of univariate analysis showed that age [(69.6 ± 7.9) vs (60.9 ± 10.1) years old, P = 0.003] and operation time [(90.0 ± 41.0) vs (66.0 ± 42.0) min, P = 0.000] were both the risk factors in delayed bleeding and non-bleeding group. Binary Logistic regression analysis showed that operation time (OR^ =1.07; 95%CI:0.73 ~ 14.63, P = 0.010) was the only predictor of delayed bleeding after ESD. Conclusions Second-look endoscopy might be effective in preventing delayed bleeding after gastric ESD, especially within 48 hours after ESD. The operation time was an independent risk factor for delayed bleeding after gastric ESD.

ObjectiveTo explore the effect of Chinese Daoyingong method on knee osteoarthritis.Methods Eighty patients with knee osteoarthritis were randomly divided into the experiment group and control group in equal number.The control group was given the routine medicine combined with Chinese fumigation and the experiment group was treated with Chinese Daoyin method beside the treatment in the control group.The two groups were compared in terms of the score on visual analog scale of pain and the score on knee function before and after treatment.Results The visual analog scale of pain in the experiment group was significantly lower than that in the control group after intervention and the score on knee function was significantly higher than that of control group (P<0.001). Conclusion The intervention with Chinese Daoyingong method plus routine medication and Chinese herbal fumigation is effective in the treatment of knee osteoarthritis.

Autophagy is of highly conserved self degradation under physiological and pathological conditions.Recent studies has been shown that autophagy play the important role in the development of ocular diseases.This article reviews the role of autophagy in the development of ocular diseases,and provides new ideals for clinical treatment of ocular diseases.

Objective Bone marrow mesenchymal stem cells (BMSCs) were induced to differentiate to the special histological types of neurons in vitro.The morphological change of cells and positive expression of specific antigen on membrane were studied,and the function of connection between the induced BMSCs was also detected.The feasibility of BMSCs differentiate to the special histological types of neurons was investigated.Methods BMSCs were divided into group Ⅰ (induced with bFGF+GDNF),group Ⅱ (induced with bFGF+GDNF+WHI-P131 +Shh),and control group (no revulsive).The morphologic change of cells was observed,and the positive rate of neuron specific surface antigen and the content of dopamine were detected.Formation of mature synaptic structure was detected by immunohistochemical assay of postsynaptic density protein 95 (PSD-95) expression,and synaptic loop was shown by FM1-43 stain synaptic vesicles.Results By immunohistochemical staining,the positive rates of dopamine transporter (DAT) and tyrosine hydroxylase (TH) in group Ⅱ were significantly higher than those in group Ⅰ,and dopamine can been detected in cell culture supematant of group Ⅱ.After BMSCs was induced into dopamine neuron-like cells,number and length of cell protrusions,positive rate of PSD-95 and fluorescence intensity of FM1-43 in group Ⅱ were significantly higher than those of group Ⅰ.Conclusions There were no significant change in positive rate of neuron-specific surface markers,rate of cell survival and differentiation rate after BMSCs differentiated to dopaminergic neuron-like cells.The number and length of cell protrusions,content of dopamine in cell culture supematant,positive rate of dopaminergic neuron-specific surface antigen (DAT and TH),synaptic function index (positive rate of PSD-95 and fluorescence intensity of synaptic loop) of group Ⅱ were all significantly higher than that of group Ⅰ.

BACKGROUND:Crainocerebral missile wound (CMW) is the common severe trauma of war. Environmental factor is the important factor that aggravates the development of sickness and threatens the life of the sick and wounded at early stage. The study on basic theory and treatment of CMW under hyperthermia and high-humidity is the major task in military medicine.OBJECTIVE: To observe the characters of bacterial growth in wound cavity and peripheral tissue after CMW in cats under hyperthermia and high-humidity so as to provide the reference data to the tissue repair and its functional recovery in CMW.DESIGN: Randomized controlled experiment.SETTING: Surgery Department of Neurology in Zhujiang Hospital affiliated to Southern Medical University(First Military Medical University).MATERIALS: The experiment was performed in Department of Tropical Medicine and Hygiene in Southern Medical University from April to May 2003. In the experiment, 24 hybrid cats were employed, of clean grade, of either sex, body-weighted (2.5±0.2) kg, provided from Experimental Animal Center of Southern Medical University. The animals were randomized into 4 groups, named the control at common temperature (5 cats), common temperature group (8 cats), hyperthermia and high-humidity group (8 cats) and blank control (3 cats).METHODS: After weighted, the cat was injected abdominally with 30 g/L pentobarbitol sodium solution at 30 mg/kg. After successful establishment of craniocerebral blindgut wound model, in common temperature group, the cats were placed in simulated climatic cabin at 25 ℃ and 50% relevant humidity for 6 hours and in hyperthermia and high-humidity group, the cats were placed in the hyperthermia and high-humidity environment for 6 hours. With biopsy, the fragmented brain tissue in wound tract and the brain tissue on the wall of wound tract far from 0-5 mm and 5-10 mm were collected and preparedinto successively natural solution and homogenate, and counting was done in 24 hours of bacterial culture to calculate bacterial content in wound cavity and peripheral tissue. In blank control, the cats were sacrificed with anesthesia and the material was collected directly, the rest steps were same as the control at common temperature.MAIN OUTCOME MEASURES: Bacterial content in wound cavity and peripheral tissue in each group.RESULTS: Totally 23 animals were employed in outcome analysis. Bacterial contents in same regions were different remarkably in different groups (F=171.423, P=0.000). It was indicated in paired comparison that significant difference happens between the control at common temperature, common temperature group and hyperthermia and high-humidity group and blank control successively (P ＜ 0.01). The difference was not significant in the comparison among the control at common temperature, common temperature group and hyperthermia and high-humidity group (P ＞ 0.05). Bacterial contents at different distances from the wound cavity were different remarkably in each group (F=14.865, P = 0.000).CONCLUSION: Hyperthermia and high-humidity does not impact significantly the bacterial growth of CMW in 6 hours and bacterial reproduction has not entered high-rate increasing stage yet, due to which, it is still safe for debridement repair.

BACKGROUND: Type Ⅰ collagen is a specific collagen secreted by in vitro cultured osteoblast, and the formed network is the basis of bone mineralization, which also reflects the ability of osteoblast bone formation. Studies have shown astragalus root increased osteoblast proliferation. However, the effect of astragalus root on improving type Ⅰ collagen expression of osteoblast remains poorly understood.OBJECTIVE: To evaluate the effect of astragalus root injection on the abilities of rat cranium-derived osteoblast proliferation and type Ⅰ collagen expression.METHODS: Rat osteoblast was cultured in vitro and divided into control group (MEM culture solution containing calf serum) and astragalus root groups (different concentrations). The effect on osteoblast proliferation was evaluated on days 1, 3, 5, 7, and 9 by MTT method. Moreover, the expression of type Ⅰ collagen protein was observed after 6 hours of treatment with astragalus root injection using in cell western-blot method. In addition, the gene expression of COLLal was investigated by real-time PCR method.RESULTS AND CONCLUSION: From days 3 to 9, the different concentrations of astragalus root injection improved osteoblast proliferation, respectively compared with control group (P ＜ 0.05), and this ascending trend peaked on day 7. Different concentretions of astragalus root injection improved COLLol mRNA expression, especially 15% astragalus root injection was the most effective. The type Ⅰ collagen protein expression of 15% and 10% astragalus root injection were significantly greater compared with the control group (P ＜ 0.05). Astragalus root injection improved in vitro cultured osteoblast proliferation and type Ⅰ collagen secretion in a certain dose-effect manner.