Objective To develop a method for determination of catechins and alkaloids in brick-tea by high performance liquid chromatography(HPLC) with diode array detection(DAD),and to explore optimum extraction conditions for catechins and alkaloids components in brick-tea.Methods Catechins and alkaloids were separated and detected by HPLC.Orthogonal experiment and paired t test was carried out to compare the effect of water and alcohol as extraction solvents and to obtain optimum extraction conditions for extracting catechins and alkaloids components in brick-tea.Results Six kinds of catechins of catechin,epicatechin,gallocatechin,epigallocatechin,epicatechin gallate,epigallocatechin gallate and two kinds of alkaloids of caffeine and theobromine were separated and detected simultaneously.Calibration curves between peak areas and concentration of each component in bricktea were linear within a suitable concentration range,and coefficients of determination (R2) were between 0.9990-0.9999; spiked recoveries were from 83.78％ to 106.35％,and relative standard deviations(RSD) were between 0.50％-1.51％.The optimum extraction condition for catechins and alkaloids was 80％ ethanol,solid-liquid ratio of 1:10,temperature 80 ℃ and extraction time 30 min.Conclusion Alcohol as extraction solvents with optimal combination on HPLC,six kinds of catechins and two kinds of alkaloids are separated accurately,qualitatively,rapidly and sensitively.

Objective To observe the regulatory effects of the preventive acupuncture and moxibustion at Guanyuan (RN4) points in ovariectomized rats, and discuss the mechanism of preventive acupuncture and moxibustion on hyoathalamus-pituitary-ovary (HPO) axis. Methods Totally 48 female SD rats were divided into 5 groups, including normal group, sham operation group, ovariectomized rats group, preventive acupuncture group and preventive moxibustion group. Except normal group and sham operation group, rats were ovariectomized after preventive acupuncture and preventive moxibustion for 30 d in corresponding groups. ELISA was used to determine the levels of E2, ER, GnRH, FSH and LH in the tissues including hypophysis, hypothalamus and uterus. Results Compared with the normal group, E2, ER and GnRH level in the tissue of the model group was significantly lower (P<0.01), the levels of FSH and LH increased obviously (P<0.01). Compared with the model group, E2, ER and GnRH level of preventive acupuncture group and preventive moxibustion group increased in different degree (P<0.05). FSH and LH level reduced in different degree (P <0.05). There was no obvious difference between preventive acupuncture and preventive moxibustion group (P>0.05). Conclusions The preventive acupuncture and preventive moxibustion at Guanyuan (RN4) has benign modulation to disordered HPO axis of ovariectomized rats. The ability of preventive acupuncture and preventive moxibustion are almost the same.

Objective To elucidate the MRI appearance of prostatic abscess,the DWI and enhanced MRI features.Methods 12 cases of prostatic abscesses were retrospectively analyzed,the clinical symptom mainly manifested as lower urinary tract symptoms and fever.All of the patients were given routine MR examination including DWI sequence,6 patients received further enhanced MR examination.Results In the 12 cases,there were 4 cases behaved as single type,8 cases as multifocal type.The abscess showed iso-or slightly hypo-signal intensity on T1 WI,hyper-signal intensity on T2 WI,markedly high signal intensity on DWI and correspond-ing markedly low signal intensity on ADC.Complete abscess walls showed iso-or slightly hyper signal on T1 WI,hypo-signal inten-sity on T2 WI.The mature abscess walls were thin and smooth,which showed homogeneously ring enhanced in 4 cases.The imma-ture abscess walls showed uneven thickness and moderately enhanced in 2 cases.Septum in the abscess could be found in 4 cases, which showed similar enhancement to the abscess walls,while the abscess cavity showed non-enhanced.Abscesses involved the sur-rounding structures in 2 cases,the involved area showed obvious hyper-signal on T2 WI fat-suppression sequence.Conclusion DWI is the best sequence in the diagnosis of prostatic abscess,the markedly high signal intensity on DWI is the characteristic sign.The enhanced MRI showed the walls and septa clearly,the extent and involvement of adjacent structures.The multi-parametric MRI is a prominent procedure in the diagnosis of prostatic abcess.

Objective To explore the clinical feature,diagnosis,treatment and prognosis of Hashimoto′s thyroiditis(HT) combined with hyperthyroidism in children.Methods The clinical features of 56 children with HT combined with hyperthyroidism,including clinical features,complications,thyroid hormone,thyroglobulin antibody(TGAb),thyroid peroxidase antibody(TPOAb),the detection of ultrasonic imaging and fine needle aspiration biopsies,diagnosis,treatment and prognosis were analyzed.Results The proportion of men to women was 16 in all 56 children,and the mean age at diagnosis was(9.95?2.09) years.The percentage of positive TGAb and TPOAb were 93% and 98%,respectively in all the 56 children.One child was diagnosed as HT combined with hyperthyroidism coexistent and myasthenia gravis type Ⅰ.The duration of hyperthyroidism ranged from 3 to 24 months.There were 14 children who had hypothyrodism and 8 children were euthyroid in all the 56 children.Conclusions Children with HT hyperthyroidism are more frequent in young females.TGAb and TPOAb are important markers for the diagnosis of HT.Pharmacotherapy is the first choice to treat HT hyperthyroidism.Hyperthyroidism is a clinical process of HT,and the percentage of children with hypothyrodism is increasing along with the development of disease.

Bone marrow microenvironment is a complex network consisting of hematopoietic stem/pro-genitor cells (HSPCs),non-hematopoietic cells,extracellular matrix and various cytokines.Its components interact to support normal hematopoiesis.Emerging evidence indicates that the dysfunction of mesenchymal stem cells,myeloid-derived suppressor cells,cytokines and the epigenetic alterations of HSPCs in the bone marrow microenvironment could influence normal hematopoiesis.Abnormal hematopoiesis contributes to the occurrence of hematological malignancies,such as myelodysplastic syndromes (MDS).Animal models have confirmed that bone marrow microenvironment plays an important role in the original generation and maintenance of malignant diseases of hematopoietic system.

Objective:To observe the influence of different treatment intervals of pulsed dye laser (PDL) in treating hypertrophic scar of burn patients and to explore the optimal treatment interval.Methods:From May 2018 to March 2019 , 20 burn patients who met the inclusion criteria and admitted to the First Affiliated Hospital of Air Force Medical University were included in this prospective randomized controlled study. Patients were divided into 1 week group [4 patients, 2 males and 2 females, aged 27 (4, 67) years,19 scars], 2 weeks group [5 patients, 2 males and 3 females, aged 9 (3, 55) years, 15 scars], 3 weeks group [5 patients, 4 males and 1 female, aged 26 (19, 45) years,15 scars], and 4 weeks group [6 patients, 4 males and 2 females, aged 31 (14, 48) years,13 scars], according to the random number table, and treated with PDL with the treatment intervals of one week, two weeks, three weeks, and four weeks, respectively, and total treatment cycle of 3 months. Before the first treatment and three months after the first treatment, the Vancouver Scar Scale (VSS) was conducted and the decreased value of VSS score was calculated; the laser doppler blood flow meter was used to measure scar blood perfusion and the proportion of change in blood perfusion volume was conducted. Data were statistically analyzed with Kruskal-Wallis test, Wilcoxon rank sum test, Wilcoxon symbolic rank sum test, Bonferroni correction, and Fisher’s exact probability test.Results:The VSS scores of patients in 1 week group, 2 weeks group, 3 weeks group, and 4 weeks group in three months after the first treatment were significantly lower than those before the first treatment ( Z=-3.74, -3.47, -2.69, -3.25, P<0.01). There were no statistically significant differences in the decreased values of VSS scores in three months after the first treatment among the patients in 4 groups ( H=5.18, P>0.05). Three months after the first treatment, the blood perfusion volumes of patients in 2 weeks group and 3 weeks group were significantly lower than those before the first treatment ( Z=-2.95, -2.50, P<0.05). The proportions of changes in blood perfusion volume of patients in the 4 groups were respectively -0.02(-1.05-0.69), -0.29 (-0.75-0.18), -0.11 (-0.55-0.23), 0.05 (-0.61-0.75). There were statistically significant differences among the 4 groups ( H=9.39, P<0.05). The proportions of changes in blood perfusion volume of patients in 2 weeks group was statistically higher than that of 1 week group ( Z=2.76, P<0.01). Conclusions:PDL treatment can reduce the VSS score and blood perfusion volume of scar, the blood perfusion volumes of patients in 2 weeks group and 3 weeks group were significantly decreased, they can be recommended as the appropriate treatment interval of PDL for hypertrophic scar after burn.

Objective To study the features and risk factors of ischemic leukoaraiosis (LA) progression in elderly patients aged 80 years and over. Methods The 56 elderly patients with ischemic LA confirmed by MRI were enrolled in this study. The characteristics and risk factors of ischemic LA were comparatively analyzed between baseline and 3 years later by single and multi-variable logistic regression analysis. Results Ischemic LA progressed mostly in the subcortical white matter in elderly patients, especially the frontal lobes (progression of white matter lesion was present in 40% in the frontal lobes at baseline and 52% after 3 years), followed by the parietal lobes (35% at baseline and 36% after 3 years); Furthermore, previous high homocysteine (Hcy) and chronic bronchitis were risk factors of ischemic LA progression. Conclusions Ischemic LA progresses mostly in the subcortical white matter in the elderly, especially the frontal lobes; High Hcy and chronic bronchitis are risk factors of ischemic LA progression in elderly patients.

AIM: To observe clinical efficacy of the intravitreal injection of conbercept treatment for exudative age -related macular degeneration.
METHODS:Prospective study. Totally 112 senile patients (112 eyes) with exudative macular degeneration were randomly divided into study group and the control group, 56 cases in each group. The study group were treated with intravitreal injection of conbercept. The control group received conservative treatment. Uncorrected visual acuity and foveal retinal thickness were observed before and after treatment in the two groups.
RESULTS: Visual acuity of study group improved significantly, and the most obvious improvement was observed at 6mo after treatment. Foveal retinal thickness of study group was reduced after treatment, and the most obvious decrease was observed at 6mo after treatment.CONCLUSION: Intravitreal injection of conbercept can improve visual acuity reduced foveal thickness in senile patients with exudative age - related macular degeneration.

Objective To observe the clinical efficieney and safety of Rosiglitazone(Avandia)Monotherapy or combi- nation with oral hypoglycemic agents in treating type 2 diabetes mellitus with Metabolic syndrome.Methods 68 type 2 diabetic patients with Metabolic syndrome were assigned to receive Avandia treatment at doses of 4mg for 12 weeks.Re,. sults Avandia used alone or in combination with oral hypoglycemic agents significantly reduced fasting plasma glucose (FBG)and fasting plasma insulin(FINS).Mean glycosylated hemoglobin values were significantly deereaseel.Home- ostasis model assessmen indicate that RSG reduced insulin resistance.There were statistically significiant decrease in systolic blood pressure(SBP)and diastolic blood pressure(DBP).No significant side-effects on kidney and liver function were found.Conclusion Avandia is an insulin sensitizer that is effective and safe on the treatment of Type 2 Diabetes with Metabolic syndrome by decreasing blood glucose and blood lipid,improving insulin resistance,and main- taining the function of pancreatic island cells.

Objective To observe the location of pelvic organs, the morphology and function of levator ani muscle (LAM) in primiparous women post vaginal delivery at 6 months postpartum using static and dynamic MRI, and investigate the correlation between LAM injury and pelvic organ prolapse (POP). Methods A perspective analysis of static and dynamic MRI was performed in fifty-one primiparous women post vaginal delivery at 6 months postpartum and thirty-five nulliparous women without experience of pregnancy and delivery as control group from June 2014 to January 2015. Previous pregnancy and abortion history, previous pelvic surgery and pelvic mass diseases were excluded. Cases with pelvic floor dysfunction symptoms were excluded from the control group. All of the women underwent static and dynamic MRI. The primiparous group was divided into two groups on presence or absence of POP on MRI findings:primiparous POP group and primiparous control group. The levatorani scoring system based on static MRI was used to characterize morphological changes of LAM into none, minor and major injury by the total score of bilateral LAM. A series of parameters including H line (the distance between the inferior margin of pubic symphysis to anorectal junction), M line (the perpendicular distance between the distal end of H line to pubococcygeal line), levator plate angle (LPA), iliococcygeal angle (ICA), and levator hiatus length and area were measured on static and dynamic MR images. Fisher exact test was performed to compare difference in distribution of the LAM injury between the primiparous group and control group, as well as the primiparous POP group and primiparous control group. Independent sample t test or Mann-Whitney test was used to compare difference in LAM parameters between the primiparous POP group and primiparous control group. Results In the 51 cases primiparous group, 44 cases showed none injury, whilst 5 cases with minor and 2 cases with major injury in the puborectal muscle. Thirty two cases showed none injury, whilst 10 cases with minor and 9 cases with major injury in the iliococcygeal muscle. In the 35 cases control group, none injury was shown in puborectal muscle, whilst 32 cases with none, 2 cases with minor and 1 case with major injury in the iliococcygeal muscle. There was no significant difference in the puborectal muscle injury between the two groups (P=0.203), and there was significant difference in the iliococcygeal muscle injury between the two groups (P<0.05). In the 24 cases primiparous POP group, 20 cases showed none injury, whilst 2 cases with minor and 2 cases with major injury in the puborectal muscle. Fourteen cases showed none injury, whilst 6 cases with minor and 4 cases with major injury in the iliococcygeal muscle. In the 27 cases primiparous control group, 24 cases showed none and 3 cases with minor injury in the puborectal muscle, whilst 18 cases with none, 4 cases with minor and 5 cases with major injury in the iliococcygeal muscle. There was no significant difference in the puborectal muscle injury and iliococcygeal muscle injury between the two groups (P=0.588 and 0.559, respectively). The LH during Valsalva status in primiparous POP group and primiparous control group were (6.7 ± 1.1) and (5.0 ± 0.6) cm, respectively, whilst the LHA was (41.6 ± 12.6) and (24.2 ± 5.5) cm2. There were significant difference between the corresponding groups (P=0.042 and 0.004, respectively). There was no significant difference between the corresponding groups of the other LAM parameters on static and dynamic MRI (all P>0.05). Conclusion Vaginal delivery may cause various degrees of LAM injury, the LAM functional deficiency were observed in primiparous women combined with POP.