Objective To explore the correlation of positive psychological capital and time management disposition in medical college students.Methods A total of 880 students from medical university were surveyed by using positive psychological capital scale and time management disposition scale.Results For gender variables,the scores of hope and optimism of males were significantly lower than those of females(P ＜ 0.05);there was no significant difference in the scores of time value sense,time monitoring sense,time efficacy sense,self-confidence and toughness between males and females (P ＞ 0.05).For birthplace variables,the rural students' scores of time value sense,hope and optimism were significantly higher than those of urban students (P ＜ 0.05);there was no significant difference in the scores of time monitoring sense,time efficacy sense,self-confidence and toughness between rural students and urban students (P ＞ 0.05).For grade variables,the score of time value sense of seniors was significantly higher than that of freshman(P ＜ 0.05);the score of time value sense of the fifth grader students was significantly higher than that of freshmen and sophomore (P ＜ 0.05);the score of time efficacy sense of the fifth grader students was significantly higher than that of sophomore (P ＜ 0.05);the scores of hope and optimism of the fifth grader students were significantly higher than those of sophomore (P ＜ 0.05);the score of optimism of freshman was significantly higher than that of sophomore(P ＜ 0.05);there was no significant difference in the scores of another dimensions in the other grades (P ＞ 0.05).Positive psychological capital and its dimensions were positively correlated with time management disposition and its dimensions (P ＜ 0.01).Positive psychological capital has good positive predictive ability on the four dimensions of time management disposition.Conclusion There is a positive correlation between positive psychological capital and time management disposition.The improvement of the level of psychological capital of college students can help to improve the ability of time management.

Objective To explore the angiogenic function of EPC from peripheral blood in kidney transplanted patient and to reveal its regulative mechanism.Methods 23 chronic renal failure patients without diabetes were recruited in department of Urology Peking University Third Hospital from January 2014 to February 2015.Fasting peripheral blood mixed with heparin (20 U/mL) was collected one day before and 24 hours after kidney transplantation.We set preoperative blood as control and the postoperative blood as the experimental group.EPC from peripheral blood were isolated by density-gradient centrifugation.FACS was used to identify the EPC.The AA metabolites PGE2 in EPC cultured medium was measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS).Q-PCR and WB were used to detect the expression of endothelial markers in HUVEC cultured under the EPC conditional medium.Tube formation assay was performed to assess the angiogenic ability of HUVEC.Results EPC from kidney transplantation expressed c-kit and CD31 by FACS analysis.Multiple types of AA metabolites was detected in the conditional medium by LC-MS/MS and level of PGE2 increased into two folds after kidney transplantation, compared with that before operation(P ＜ 0.05).HUVEC highly expressed CD31 and VE-cadherin cultured under conditional medium, which were 1.5 folds compared with that before operation (P ＜ 0.01).And those cells formed more tubes than that in control group, which showed better angiogenic capacity.HUVEC, treated by PGE2, had the similar biological characteristics like the conditional culture.Conclusions EPCs in the peripheral blood form kidney transplantation patient secret the PGE2, which can enhance the capacity of angiogenesis in HUVEC.

Objective To evaluate the effects of different ratios of medicine dosage for isoflurane and propofol on postoperative cognitive function of rats with mild cognitive impairment (MCI).Methods Healthy male Wistar rats,aged 16-18 months,were used in the study.MCI model was established by occlusion of bilateral common carotid arteries.One hundred and fifty rats with MCI were divided into 5 groups (n=30 each) using a random number table:sham operation group (group S),isoflurane group (group I),propofol group (group P) and different ratios of medicine dosage for isoflurane and propofol groups (IP1,2 groups).The rats inhaled 1.9％ isoflurane for 3 h in group I.Propofol 40 mg · kg-1 · h-1 was infused intravenously for 3 h in group P.The rats inhaled 1.0％ isoflurane,and propofol 20 mg · kg 1 · h-1 was infused intravenously for 3 h in group IP1.The rats inhaled 1.4％ isoflurane,and propofol 10 mg· kg-1 · h-1 was infused intravenously for 3 h in group IP2.After disappearance of eyelash reflex,open reduction and internal fixation was performed after tibial fracture was induced.On 7 days after operation,contextual fear conditioning test and Y maze test were used to assess the cognitive function,and hippocampal tissues were obtained to count the viable neurons (using Nissl's staining) and CCAAT/enhancer-binding protein homologous protein (CHOP) and caspase-12 positive neurons (by immunofluorescence) in hippocampal CA1 region.Results Compared with group S,the rate of time spent in N arm,the rate of time spent freezing,and the number of viable neurons were significantly decreased,and the number of CHOP and caspase-12 positive neurons were significantly increased in IP2,I and P groups (P＜0.05),and no significant change was found in the parameters mentioned above in group IP1 (P＞0.05).Compared with group IP1,the rate of time spent in N arm,the rate of time spent freezing,and the number of viable neurons were significantly decreased,and the number of CHOP and caspase-12 positive neurons was significantly increased in IP2,I and P groups (P＜0.05).Compared with group IP2,the rate of time spent in N arm,the rate of time spent freezing,and the number of viable neurons were significantly decreased,and the nunber of CHOP and caspase-12 positive neurons was significantly increased in I and P groups (P＜0.05).Conclusion Combination of 1.0％ isoflurane and propofol 20 mg · kg-1 · h-1 does not aggravate the postoperative cognitive dysfunction of the rats with MCI.

Herpesviruses is one of the most common human infectious diseases, which can be divided into different types based on clinical infection degree.Herpes simplex virus usually results in buccal and genital mucocutaneous infections, while cytomegalovirus is the most common opportunistic pathogen associated with significant morbidity and mortality in immunocompromised hosts, especially in transplant and cancer patients.Although nucleoside analogues are effective antiviral drugs, the emergence of drug-resistant viruses has created a barrier for the treatment of herpesviruses infections, especially in immunocompromised patients.Therefore, novel therapeutic agents are needed to avoid the limitations of drug resistance.In this article, research progress in the therapeutic agents for drug-resistant herpesviruses was reviewed from the aspects of non-nucleoside analogues, novel antiviral targets and newly antiviral mechanisms.

Objective To investigate the appropriate compatibility of appropriate compatibility of sevoflurane and propofol for patients with mild cognitive impairment (MCI) undergoing posterior lumbar interbody fusion in order to protect their cognitive function.Methods Eighty patients, 41 males, 39 females, aged 65-75 years, BMI 17-26 kg/m2, ASA physical status Ⅰ or Ⅱ, scheduled to undergo elective posterior lumbar interbody fusion, were to be scored according to Montreal cognitive assessment (MoCA), mini mental state examination (MMSE), dementia scale (CDR) and daily living ability scale (ADL) to identify patients with MCI before the surgery.They were randomly assigned to 4 groups (n=20 each) using a random number table: TCI propofol 2.0-2.5 μg/ml group (group P), TCI propofol 1.2 μg/ml+sevoflurane 0.6 MAC group (group PS1), TCI propofol 0.6 μg/ml+sevoflurane 0.9 MAC group (group PS2), 1.0-1.5 MAC sevoflurane group (group S).MoCA and MMSE were used to evaluate the cognitive function of patients 1 d before the operation (T0), after patients become wide-awake (T1), 3 d and 7 d after operation (T2 and T3).Apolipoprotein J (ApoJ) concentration related to cognitive function in blood samples, which were drawn at T0-T3 would be measured with ELISA method.Results Compared with T0, the scores of MMSE and MoCA in four groups decreased significantly (P＜0.05) at T1, the scores of MMSE and MoCA in group S decreased significantly (P＜0.05) at T2;compared with T1, the score of MMSE in the four groups increased significantly at T2, T3 (P＜0.05).The scores of MMSE at T1, T3 in group S decreased significantly compared with groups P, PS1 and PS2 (P＜0.05).The scores of MoCA at T2, T3 in group S decreased significantly compared with groups P, PS1 and PS2 (P＜0.05).Compared with T0, the concentration of plasma ApoJ in the four groups increased significantly at T1 (P＜0.05).Compared with T1, the concentration of plasma ApoJ in the four groups decreased significantly at T2 and T3 (P＜0.05).Compared with group PS1, the concentration of plasma ApoJ at T1, T3 increased significantly in groups S and group PS2 (P＜0.05).Conclusion TCI propofol 1.2 μg/ml combined with 0.6 MAC sevoflurane group is the appropriate compatibility of sevoflurane and propofol for patients with MCI undergoing posterior lumbar interbody fusion,because it has less negative influence on cognitive function and lower concentration of plasma ApoJ.

OBJECTIVETo explore the effects of principal-subordinate acupoints combination on improving myocardial ischemia, and the gene regulatory pathways for the protection of myocardial ischemia.

METHODSAccording to the random number table method, 70 SPF Wistar male rats were divided into a normal group, a model group, a LY294002 group, an insulin-like growth factors-1(IGF-1) group, a Neiguan group, an acupoint combination group and an acupoint combination + LY294002 group, 10 rats in each one. Rats in the normal group were injected with 0.9% NaCl solution, while rats in the remaining groups were treated with abdominal subcutaneous injection of isoroterenol hydrochloride to establish the rat model of myocardial ischemia. Rats in the LY294002 group and IGF-1 group were treated with injection of LY294002 solution and IGF-1 solution for 14 days. Rats in the Neiguan group were treated with electroacupuncture (EA) at "Neiguan" (PC 6) by using Han-200 EA apparatus for 10 min per treatment. Rats in the acupoint combination group were treated with EA at "Neiguan" (PC 6), "Zusanli" (ST 36) and "Guanyuan" (CV 4) by using Han-200 EA apparatus for 10 min per treatment. Rats in the acupoint combination + LY294002 group were treated with LY294002 solution for 14 days, and EA at "Neiguan" (PC 6), "Zusanli" (ST 36) and "Guanyuan" (CV 4) was given before model establishment, once a day for 21 days. EA pretreatment was given before model establishment in all acupuncture groups. The heart rate (HR) and ST segment voltage were detected before and after treatment; the myocardial pathological morphology was observed by HE staining; the expressions of P13K mRNA and Akt mRNA were tested.

RESULTSAfter modeling, HR and ST segment voltage in all intervention groups were higher than those in the normal group (all P < 0.01); after the intervention, the HR and the ST segment voltage in the acupoint combination group, IGF-1 group and IGF-1 group were improved (P < 0.01, P < 0.05), which was more significant in the acupoint combination group and Neiguan group (all P < 0.01). As for the myocardial pathological morphology, obvious myocardial ischemia was observed in the model group, and that in the LY294002 group was the most serious, and that in the acupoint combination+ LY294002 group was moderate. After intervention, the myocardial pathological damage in the IGF-1 group, Neiguan group and acupoint combination group was significant improved, which was more significant in the IGF-1 group and acupoint combination group. As for the expression of PI3K mRNA and Akt mRNA, compared with normal group, the expression of PI3K mRNA was increased in the remaining groups after modeling (P < 0.01, P < 0.05), which was more significant in the IGF-1 group and acupoint combination group (all P < 0. 01). The expression of Akt mRNA in the LY294002 group and acupoint combination + LY294002 group was reduced (P < 0. 01, P < 0.05), while that in the remaining groups was increased (P < 0.01, P < 0.05), which was more significant in the IGF-1 group and acupoint combination group (all P < 0.01).

CONCLUSIONThe principal-subordinate acupoints combination could improve heart rate and ST segment voltage in rats with chronic myocardial ischemia, reduce myocardial pathological damage, which is superior to single selection of "Neiguan" (PC 6). The PI3K/Akt signaling pathway may be involved in the regulation mechanism of principal-subordinate acupoints combination for the protection of chronic myocardial ischemia.

Acupuncture Points ; Acupuncture Therapy ; Animals ; Chronic Disease ; therapy ; Electroacupuncture ; Electrocardiography ; Heart Rate ; Humans ; Insulin-Like Growth Factor I ; metabolism ; Male ; Myocardial Ischemia ; enzymology ; pathology ; physiopathology ; therapy ; Myocardium ; pathology ; Phosphatidylinositol 3-Kinases ; genetics ; metabolism ; Proto-Oncogene Proteins c-akt ; genetics ; metabolism ; Rats ; Rats, Wistar

Objective To estimate the value of clinical parameters (such as patients' age,longitudinal melanonychia width and location) for the differential diagnosis of malignant and benign longitudinal melanonychia as well as for the evaluation of the necessity for invasive management.Methods A retrospective study was performed on 28 cases of subungual malignant melanoma collected from 2000 to 2010 as well as on 62 cases of benign longitudinal melanonychia from 2005 to 2010.Clinical analysis was carried out to compare the differences in clinical parameters such as.patients' age,longitudinal melanonychia width and lesional location,between the malignant melanoma and benign longitudinal melanonychia cases.Logistic regression analysis and ROC method were used to determine valuable clinical parameters for the differential diagnosis of malignant and benign longitudinal melanonychia.Results Significant differences were observed in the median age at diagnosis (23.0 years vs.52.5 years,Z =5.44,P ＜ 0.01 ),age at onset (21.0 years vs.48.0 years,Z =4.70,P ＜ 0.01 ),and longitudinal melanonychia width (3.0 mm vs.15.0 mm,Z =5.69,P ＜ 0.01 ) between the patients with malignant melanoma and benign longitudinal melanonychia.The involvement of thumb and hallux was observed in 77.8％ of the subungual melanoma cases,and 48.3％ of the benign cases (x2 =6.57,P ＜ 0.05).ROC method and Logistic regression analysis indicated that the age at onset and diagnosis as well as width of longitudinal melanonychia were of diagnostic value for the differential diagnosis of malignant and benign longitudinal melanonychia.Conclusions Not all longitudinal melanonychia cases need an invasive management at the time of awareness.The age at onset and diagnosis,width of melanonychia and site of the onset appear to be valuable in the differential diagnosis of malignant and benign longitudinal melanonychia,and there is a possibility to guide clinical diagnosis and treatment by establishing a mathematical model with these parameters.

Medical ethics education in clinical practice stage is especially critical to improve medical students' humanistic, medical ethics and professional accomplishment. Compared with other clinical disciplines, dermatology and venereology has many characteristics. To strengthen medical ethics education in dermatology and venereology clinical practice, we should persist in promoting and cultivating core values of Chinese socialism, accurately grasp the characteristics of various skin diseases, educate and guide students to flexibly apply the basic principles of ethics and improve their ethical decision-making ability. In the process of teaching implementation, we should pay attention to the coordination of education, enrich teaching means and strengthen practical teaching, so as to improve the quality of education.

Objective To explore the mechanism of Lkb1 regulated epithelial regeneration in asthma by airway organoid culture.Methods Lkb1f/f(the control group,n=10)and Scgb1a1CreER;Lkb1f/fmice(the Lkb1 knockout group,n=9)were taken to establish allergic asthma models by aerosol inhalation of ovalbumin(OVA).Bronchial lavage fluid(BALF)and lung tissue were collected.The number of inflammatory cells in BALF were counted.The amount of CLCA3 positive cells was compared by immunofluorescence staining of lung tissue sections.Club cells were selected by flow cytometry for organoid culture.The average diameter of organoids and organoid formation rate were calculated.Expression levels of goblet cell marker CLCA3,cilia cell markers FOXJ1 and AMPK in Club cells were detected by RT-PCR.Results There were no significant differences in the number of macrophages,eosinophils,neutrophils and lymphocytes in BALF between the control group and the Lkb1 knockout group.The number of CLCA3 positive cells were decreased after Lkb1 knockout.Results of organoid culture showed that the average diameter of organoids derived from Club cells and organoid formation rate were decreased after the absence of Lkb1.The expression of FOXJ1 was reduced.After Lkb1 deletion,the expression of AMPKα in Club cells were decreased and the proliferation of Club cells was inhibited.Activation of AMPK,the downstream signaling pathway of Lkb1,could attenuate the effect of Lkb1 deficiency on the regeneration of Club cells.Conclusion Lkb1 promotes the proliferation of airway progenitor cells by AMPK pathway.

w biomarker to predict the presence of vulnerable plaque.