Melatonin (N-acetyl-5-methoxytryptamine, MT) is a hormone synthesized and secreted by the pineal gland. Recent studies show that melatonin plays an essential role in the pathogenesis of many reproductive processes. High-concentration melatonin exists in human preovulatory follicular fluid and melatonin receptors are present in ovarian granulosa cells, which indicates the direct effects of melatonin on ovarian function. Reactive oxygen species are involved in a number of reproductive events, including folliculogenesis, follicular atresia, ovulation, oocyte maturation, and corpus luteum formation. Melatonin and its metabolites, as powerful antioxidants and free radical scavengers, can potentially inhibit premature ovarian failure. Literature published in recent years shows the essential roles of melatonin in improving human ovarian function and oocyte quality as well as in the management of infertility. Researches on the action mechanisms of melatonin may provide a theoretical basis for the prevention and treatment of some clinical diseases.
Female ; Granulosa Cells ; metabolism ; physiology ; Humans ; Melatonin ; metabolism ; physiology ; Ovarian Follicle ; growth & development ; metabolism ; Ovary ; physiology ; Reactive Oxygen Species ; metabolism

Objective:To establish an HPLC method for the determination of the related substances in vidarabine monophosphate for injection. Methods:The known impurities vidarabine and adenine in vidarabine monophosphate for injection were analyzed by an external standard method on a Kromasil 100-5 C18 column(250 mm × 4. 6 mm,5μm)with the mobile phase consisting of water(contai-ning 10 mmol·L-1 tetrabutyl ammonium hydroxide and 10 mmol·L-1 potassium dihydrogen phosphate)-methanol(80:20)at a flow rate of 1. 0 ml·min-1,the detection wavelength was set at 258nm,the column temperature was at 30℃,and the sample size was 20μl. Meanwhile,the unknown impurities were examined by a self-control method. Results:Good linear relationships of vidarabine and adenine were obtained within the range of 0.0765 ~1.530 7μg·ml-1(r =0.999 9)and 0.078 0 ~1.560 0 μg·ml-1(r =0. 999 9). The corresponding average recovery was 99. 8% with RSD of 0. 2%(n=9)for vidarabine and 97. 0% with RSD of 1. 2%(n=9)for adenine. Conclusion:The method can be used to determine the related substances in vidarabine monophosphate for injec-tion.

Objective To establish a method for determining the molecular weight (Mw) and molecular weight distribution of Iron Maltose Syrup. Methods HPGPC was used; PSS HEMA was used as column.Detector was differential refraction detector.Mobile phase was phosphate buffer solution (pH6.8) at 0.5 mL/min, column temperature was 45℃.Results The Mw of 3 batches of Iron Maltose Syrup were 45000-47000 Da with good linearity, precision and reproducibility.Conclusion The method is simple, reliable and accepted by the specification for controlling the molecular weight and weight distribution of Iron Maltose Syrup.

Objective:To study the effect of childhood abuse on student's suicide ideation and attitude to suicide. Methods:90 Technical Secondary School Students with history of being abused and 90 without that history were investigated by applying Questionnaire of Commit Suicide Attitude and Beck Scale for Suicide Ideation. Results:Compared with those without being abused, the abused students had higher percentages having suicide ideation in the past week (14.4% vs. 2.2%,?~2=7.27, P

Objective: To study the effect of childhood abuse on students mental health and alexithymia, and to analyze the relationship between psychosomatic symptoms and alexithymia. Methods: 90 abused Technical Secondary School Students and 90 no-abused Technical Secondary School Students from Xuzhou were investigated by applying Symptom Checklist 90 ( SCL - 90 ) , Toronto alexithymia Scale ( TAS) . Results: Compared with no-abused students, the students who had been abused in childhood showed significantly higher psychiatric symptoms of somatization (1. 8?0. 6) , interpersonal relationship (2.0?0.7) , depression (1.9?0.6) , anxiety (1. 8?0. 5 ) , hostility (1. 8?0. 6) , paranoia (1. 9?0. 6) , psychoticism (1. 8?0. 6) , obsessive (2. 0?0. 6) , phobia (1. 7?0. 6) than control (1.4?0.5, 1.7?0.6, 1.6?0.6, 1.6?0.5, 1.5?0.5, 1.6?0.5, 1.6?0.5, 1.8?0.6, 1.5?0.5, P

OBJECTIVE:To establish a method for the determination of ethanol,acetonitrile,dichloromethane,ethyl acetate, pyridine in vidarabine monophosphate. METHODS:Headspace GC was performed on the column of Agilent DB-624,programmed temperature,inlet temperature was 200 ℃,the detector was flame ionization detector,detecting temperature was 250 ℃,nitrogen was carrier gas,flow rate was 3 ml/min,split ratio was 1∶1,the top bottles equilibrium temperature was 100 ℃,and equilibrium time was 45 min,injection volume was 1 ml. external standard was used for quantitative analysis. RESULTS:The peaks of five re-sidual solvents could be completely separated from the other peaks respectively,The linear rang was 24.7-296.3 μg/ml for ethanol (r=0.999 6)、1.9-23.2 μg/ml for acetonitrile(r=0.999 0),2.8-33.6 μg/ml for dichloromethane(r=0.998 0),24.7-295.9 μg/ml for ethyl acetate(r=0.999 5),1.0-11.9 μg/ml for pyridine(r=0.998 6);RSDs of precision and reproducibility tests were lower than 4.35%;recoveries were 102.4%(RSD=2.0%,n=9)、102.1%(RSD=3.4%,n=9)、105.5%(RSD=4.8%,n=9)、100.3%(RSD=4.8%, n=9)、98.3%(RSD=4.0%,n=9). The minimum quantifation limit was 0.304 4-0.988 0 μg/ml and the minimum detection limit was 0.101 5-0.329 3 μg/ml. CONCLUSIONS:The method is simple,accurate and reproducible,and can be used for the determination of residual solvents in vidarabine monophosphate.

Objective To provide a specific,sensitive,reproducible HPLC method for the determination of doxepin in urine and whole blood with doxapram as the internal standard.Methods The sample preparation was simple and time-saving by using an Oasis pretreatment cartridge.Separations were achieved by a Lichrospher  100 RP-18e (250mm?4.0mm,5?m)column kept at 50 ℃,and the DAD detector was set at 230nm and 250nm.Results The detection limit was 2 ng/ml in urine and whole blood.The results showed excellent linearity.The relative standard deviation of between-day and within-day assay was Less than 6.75%,and absolute recoveries were higher than 85%.Conclusion The method for determination of doxepin in urine and whole blood is effective,simple and reliable,which may be applicable to the practical cases.

OBJECTIVE:To observe the clinical efficacy and safety of Pudilan xiaoyan oral liquid combined with bronchial dil-atation drugs in the treatment of moderate to severe stable chronic obstructive pulmonary disease(COPD). METHODS:According to admission time,102 patients with stable moderate to severe COPD were randomly divided into treatment group(n=53)and con-trol group(n=49). Control group received Budesonide and formoterol fumarate powder for inhalation and Tiotropium bromide pow-der for inhalation;based on control group,treatment group was additionally treated with Pudilan xiaoyan oral liquid,10 ml/time, 3 times a day, for 12 weeks. The lung function index, number of acute COPD attack, modified medical research council (mMRC),CAT and CCQ were performed and comparison in the two groups. RESULTS:After 12 weeks of treatment,the IC of treatment group was improved significantly,compared to before treatment and control group;there was statistical significance(P<0.05). There was no statistical significance in FEV1 and FEV1/FVC%of treatment group after treatment,compared to before treat-ment and control group(P>0.05);there was no statistical significance in the number of acute COPD attack between 2 groups(P>0.05). mMRC,CAT score and CCQ total score of treatment group were improved significantly,compared to before treatment and control group;there was statistical significance (P<0.05). No obvious ADR was found in 2 groups. CONCLUSIONS:Pudilan xiaoyan oral liquid combined with bronchial dilatation drugs for inhalation is better than powder for inhalation in the treatment of moderate to serve stable COPD,can improve pulmonary function significantly,exercise tolerance and quality of life.

Objective To understand the status of post-traumatic growth of severe burn patients and analyze its influencing factors. Methods General information questionnaire and post-traumatic growth inventory (PTGI) were used to investigate thirty patients with severe burn. Multi-linear regression method was used to analyze the post-traumatic influencing factors. Results The average score of PTGI was (68.30 ± 10.90), which was in media level. The main influencing factors included burn area, active exercise, time and expense of treatment, marital status and sear proliferation. Conclusion In order to improve the post-traumatic growth,nurses should enhance psychological intervention, teach effective coping strategies and increase the social level to the burn patients.

Clinical, neuroimaging, and pathologic studies suggested that a variety of nonmotor symptoms, such as olfactory dysfunction, dysautonomia, and mood and sleep disorders, can precede the typic motor features of Parkinson disease (PD) by years and, perhaps, even decades. The period when these symptoms arise can be referred as the premotor phase of the disease. This paper reviewed the conception, clinical manifestation, pathology, diogose of the premotor phase of early Parkinson disease.