Objective To investigate the therapeutic effects of melatonin (MT) on human pancreatic cancer in Balb/c nude mice subcutaneous xenograft model. Methods Pancreatic cancer model was established high dose MT(20 mg· kg -1 · d-1 ) , gemcitabine( GEM,50 mg· kg -1 · d-1 ) and high dose MT combination with GEM. Tumor size was measured regularly. The tumor growth curve was drawn. The activity of mice spleen natural killer cell was determined by MTT. Results Compared with the controls [ ( 1. 476 ± 0.075) cm3 ], tumor volumes in low dose MT group[ (0.998 ±0.112)cm3], high dose MT group[ (0.756 ±0.128) cm3], GEM group [ (0. 746 ± 0. 115 ) cm3 ], combination group [ (0. 305 ± 0. 111 ) cm3 ] were significantly decreased ( P <0.01), and the tumor size in high dose MT group was smaller than that in low dose MT group, while the tumor size in combination group was the smallest. The activity of mice spleen natural killer cell was ( 18.07 ± 1.23) %in control group, and they were (44.27 ±3.19)% ,(45.16 ±3.20)% and (30.29 ±2.91)% in low dose MT group, high dose MT group, combination group, which were significantly higher than those in the control group;the activity of natural killer cell in GEM group was ( 14.24 ± 2.70) %, which was significantly lower than that in the control group (P <0.05), but the activity of natural killer cell in combination group was significantly higher than that in the GEM group (P < 0.01 ). Conclusions MT could improve the immune function of mice,inhibit the growth of tumor, and MT combination with GEM may have more potent antitumor effect.

Objective To explore the application effect of paclitaxel combined with carboplatin neoadjuvant chemotherapy in patients with advanced cervical carcinoma.Methods Forty patients with stage Ⅱa and above cervical cancer who were treated between August 2015 and August 2016 were selected as the research objectives and all patients were diagnosed by pathological examination.They were divided randomly into experimental group(n=20)and control group(n=20).Patients in the experimental group were treated with intravenous chemotherapy before operation.This scheme included paclitaxel and carboplatin.It included 2 cycles,and the interval between the 2 cycles was 3 weeks.Extensive hysterectomy and pelvic lymphadenectomy were made in 14 days after chemotherapy.The patients in the control group were treated only with extensive hysterectomy and pelvic lymphadenectomy.The efficacy of neoadjuvant chemotherapy was evaluated according to WHO criteria,and observed the operation condition.Adverse drug reactions were evaluated according to WHO anti-cancer drug adverse reaction grade.The quality of life of the two groups was evaluated by the mos item short from health survey(SF-36).Results 20 patients completed chemotherapy,CR5 cases,PR11 cases,SD3 cases,PD1 cases,and the total effective rate(CR+PR)was 80％.At the same time,The paracervical tissue becomed soft in varying degrees,the gap widened,the invasive lesions were controlled in different degrees.Adverse reactions were mild and relieved without special treatment.There was no kidney and heart function damage.All cases were operated successfully after chemotherapy.There were no significant difference in operation time and blood loss between the two groups.The rate of lymph node metastasis,the infiltration rate of uterine tissue and the residual rate of tumor tissue in the vaginal margin were lower than those in the control group(P<0.01).The SF-36 scores of the two groups were higher than those before treatment,but the score of the experimental group was higher significantly than that of the control group,and the difference was statistically significant(P<0.01).Conclusion Paclitaxel combined with carboplatin in neoadjuvant chemotherapy of cervical cancer can reduce the tumor volume,increase the chance of surgery,has less toxic side effects,lower metastatic rate and improve the quality of life of patients.It is worthy of further clinical research and recommendation.

Objective: To study the air removal efficiency of prevacuum sterilizers.Methods: The results of Bowie-Dick(BD) tests were monitored every day using the 3M disposable BD test pack,which was placed horizontally in the bottom section of the sterilizer rack near the exhaust opening.Results: Of the 1370 BD tests conducted with 3 autoclaves,1366 showed negative results and 4 positive.Conclusion: BD tests can be used to precisely assess the efficiency of prevacuum sterilizers.

Objective To evaluate the impact of multiple lacunar infarction (MLI) on the outcomes of mild cognitive impairment (MCI). Methods MCI patients were selected in outpatients and hospitalized patients using a common international standard MCI screen. Magnetic resonance imaging (MRI) and computer tomography (CT) were used to determine the presence of MLI. MCI patients were followed up for 6～24 months and their cognitive status and the impact of MLI on MCI were evaluated using Kaplan-Meier survival analysis. Results One hundred twenty patients were diagnosed as having MCI based on clinical evaluation and neuropsychological assessment. Among them, 43 (35.8%) patients had MLI and the rest 77 (64.1%) patients did not have. Twenty-seven MCI patients with MLI (62.8%) developed dementia, while 15 MCI patients without MLI (19.4%) developed dementia during 6～24 months follow-up. Kaplan-Meier analysis indicated that the incidence of dementia was significantly higher in patients with MLI than in patients without MLI did (P＜0.05). Conclusions MCI patients with MLI are more prone to dementia. These results suggest that early interventions aimed at controlling the modifiable risks are warranted for dementia prevention in MCI patients with MLI.

Objective To investigate procalcitonin (PCT) and C reactive protein (CRP) expression in patients with puerperal infection after cesarean section and its clinical significance.Methods From January 2014 to January 2016,134 cases of cesarean section puerperal infection patients in our hospital were enrolled in observation group,according to 1∶3 matching,we selected 402 cases of cesarean section without puerperal infection as the control group.Then the levels of PCT and CRP in two groups were detected.Results CRP and PCT levels of 24 h,48 h and 72 h of the patients in the observation group were (13.16 ± 1.06)mg/L and (1.05 ±0.42)g/L,(15.15 ± 1.50)mg/L and (1.67 ±0.31)g/L,(16.01 ± 2.32) mg/L and (2.10 ± 0.92) g/L respectively,significantly higher than the control group (P ＜ 0.05);72 h CRP and PCT levels of pelvic cavity peritonitis patients were (17.13 ± 1.46)mg/L and (2.81 ± 0.97) g/L respectively,significantly higher than that in patients with vulvovaginal and cervicitis,endometritis and fallopian tube (P ＜ 0.05);72 h CRP and PCT in patients with endometritis and fallopian tube inflammation were (15.89 ± 1.06) mg/L and (2.06 ± 0.83) g/L,significantly higher than that of vaginal and Cervicitis Patients (P ＜ 0.05).Conclusions CRP and PCT increase rapidly in patients with puerperal infection after cesarean section,and there are a certain relationship with puerperal infection disease and they are of certain clinical application value.

Objective:This study aims to summarize the achievements of the research wards in a large grade A tertiary hospital in Beijing, discuss the important role of pharmacists, and provide a reference for improving the functions and responsibilities of pharmacists in the research ward construction.Methods:Combining the practice of research ward construction in a grade A tertiary hospital in Beijing, the important role of pharmacists in the construction and operation of research wards were analyzed in system construction, information construction, analysis laboratory construction, and project management.Results:The participation of pharmacists with professional pharmaceutical knowledge and familiarity with the relevant policies and regulations of clinical research can greatly improve the quality and efficiency of research ward construction and operation.Conclusions:Pharmacists' participation in the construction of research wards is beneficial to improving clinical research ability and quality, and is of great significance to the development of China′s pharmaceutical health industry.

Objective:This study aims to summarize the construction and operation results of a clinical research support platform in a large grade A tertiary hospital in Beijing, and to explore the top-level design, functional positioning, and operation management based on research wards, thereby providing a reference for improving the clinical research support system in China.Methods:Guided by the needs of clinical research, the clinical research support platform consisted of seven core functional units, including the clinical trial platform, medical ethical review platform, medical experiment and clinical testing platform, clinical research big data platform, clinical research methodology platform, scientific and technological achievements transformation platform, and biobank.Results:The clinical research support platform with perfect functions, scientific management, and efficient operation can provide strong technical support for efficient operation of research wards, high-quality development of clinical trials, and rapid transformation of innovative results.Conclusions:A high-level clinical research support platform can effectively integrate medical resources, promote resource sharing and cooperation, promote the deep integration of industry, academia, research, and medicine, and enhance the collaboration and scientific level of clinical research.

The relationship between chronic psychological stress and tumorigenesis has been well defined in epidemiological studies; however, the underlying mechanism remains underexplored. In this study, we discovered that impaired macrophage phagocytosis contributed to the psychological stress-evoked tumor susceptibility, and the stress hormone glucocorticoid (GC) was identified as a principal detrimental factor. Mechanistically, GC disturbed the balance of the "eat me" signal receptor (low-density lipoprotein receptor-related protein-1, LRP1) and the "don't eat me" signal receptor (signal regulatory protein alpha, SIRPα). Further analysis revealed that GC led to a direct, glucocorticoid receptor (GR)-dependent trans-repression of LRP1 expression, and the repressed LRP1, in turn, resulted in the elevated gene level of SIRPα by down-regulating miRNA-4695-3p. These data collectively demonstrate that stress induces the imbalance of the LRP1/SIRPα axis and entails the disturbance of tumor cell clearance by macrophages. Our findings provide the mechanistic insight into psychological stress-evoked tumor susceptibility and indicate that the balance of LRP1/SIRPα axis may serve as a potential therapeutic strategy for tumor treatment.