BACKGROUND: Puerarin possesses various biological efficacies, such as the protective efficacy on hypertension, cardiac disease, diabetes mellitus and blood disease, and the extracts of puerarin can inhibit the proliferation of S180 sarcoma and Lewis lung cancer to some extent.OBJECTIVE: To investigate the modulation effects of total flavone of puerarin (TFP) on the growth of pheochromocytoma PC12 cells and the protective efficacy on the H2O2-induced cellular oxidative damage.DESIGN: Complete randomization design and control experiment.SETTING: Department of Biochemistry and Institute of Geriatrics, Chinese PLA General Hospital.MATERIALS: Puerarin was bought from Tongrentang drug store, and TFP was extracted and purified routinely by ethanol and ether acetate, then was evaluated with thin-layer chromatography. The content of puerarin in extracts was 31.79% in quantitative assay. Methyl thiazolyl tetrazolium (MTT), luminal and anti-oxidative activity reagent xanthine oxidase were all from Sigma Company. PC12 cells were given by Institute of Geriatrics,Chinese PLA General Hospital as a present.METHODS: The experiment was conducted at the Institute of Geriatrics, Chinese PLA General Hospital from January to July in·2001.① The cells were cultured in 20 g/L DMEM (pH 7.1-7.2), and randomized into two groups: TFP group and H2O2-injury+TFP group, and each group was divided into 5 mass concentrations (0, 1.0, 10, 100 mg/L and 1.0 g/L). There were 8 holes for parallel culture with 100 mL culture medium in each hole (containing 1 ×l09 L-1 cells). TFP group:TFP was added for 72-hour culture at 37 ℃; H2O2 injury+TFP group:TFP was firstly cultured for 48 hours at 37 ℃, then 500 mmol/L H2O2 was added and co-cultured for other 24 hours.②The activity of cultured PC12 cells was monitored by MTF assays, the content of nitrite was measured by Griess reagents, and the antioxidant activity of superoxidedismutase (SOD) was monitored by hypoxanthine/xanthine oxidase.H2O2-initiated PC12 cellular oxidative damage had been used as experimental model to study the protective efficacy of TFP, and expressed as inhibition ratio [(blank A value-detection A value)/blank A value × 100%]. The higher inhibition ratio indicated the strong ability of clearing O2-. ③ One-factor analysis of variance was used to compare the difference between data. MAIN OUTCOME MEASURES: The influence of TFP on the nitrite content, SOD activity and cell activity in PC12 cells.RESULTS: ①Effect of TFP on PC12 cell activity: 1-10 mg/L TFP hadno obvious effects on the growth of PC12 cells, and 100 mg/L TFP in creased the cell growth (P ＜ 0.05), whereas the TFP concentration was increased to 1.0 g/L, the activity of PC12 cells was inhibited obviously (P ＜ 0.01). TFP of 1-100 mg/L could protect the cultured cells from the oxidative damages of H2O2 concentration dependently (P ＜ 0.05).② Effect of TFP on clearing O2-: The ability of clearing O2 increased withthe mass concentrations of TFP in both groups with obvious dose-effect relation, except when 1 mg/L TFP was added in the H2O2 injury+TFP group. The SOD activity in PC12 cell culture liquid was obviously en hanced after adding 100 mg/L and 1 g/L TFP, compared with that without TFP addition (P ＜ 0.05-0.01). ③Modulation of TFP on nitrite: TFP of low concentration (1-100 mg/L) reduced the production of cellnitrite, whereas increased the nitrite production at the concentration of1.0 mg/mL.CONCLUSION: ①TFP can regulate the growth of PC12 cells, which canbe enhanced by low-concentration (1-100 mg/L) TFP whereas inhibited byhigh-concentration (1 g/L) TFP. However, the anti-oxidation of TFP is themost powerful. ②TFP can protect the PC12 cells obviously from the oxidative damages induced by H2O2 at low concentration.

Objective To investigate the dynamic expressions and clinical significance of CD141, CD31 and CD95 on circulating endothelial cells (CEC) in febrile and polyuria phases of patients with hemorrhagic fever with renal syndrome (HFRS). Methods Expressions of CD141, CD31 and CD95 in the peripheral blood of patients with HFRS in febrile and polyuria phases were detected by flow cytometry. Comparisons among groups were done by one-factor analysis of variance. Results The percentages of CD141+ CD31+ cells in the peripheral blood cells from patients with HFRS in febrile and polyuria phases were 9.47% ±1.98 % and 8. 26% ±1.55 %, respectively, which were both higher than that (7.05%±1.45%) in healthy controls (F=8. 42; P=0. 000 and P=0. 029, respectively), and that in febrile phase was higher than that in polyuria phase (P = 0. 048). The mean fluorescent intensity (MFI) of CD95 on CEC of HFRS patients in febrile and polyuria phases were both significantly higher than that in healthy controls (F=19. 93; P=0. 000 and P=0. 000 respectively), and that in febrile phase was higher than that in polyuria phase (P=0. 049). In the febrile phase of HFRS,the MFI of CD95+ on CEC in patients with all clinical types were all higher than that in healthy controls (F= 17. 36; all P=0. 000), and that in severe (critical) type was the highest and higher than those in mild type and moderate type (P=0. 002 and P=0. 009, respectively). Conclusion The proportion of CEC and expression of CD95 on CEC are possibly related with the phase and severity of HFRS.

In this review, we have briefly described the concept, status quo and relevant variables of worldwide nurses′ professional identity. Moreover, there has been a detailed summary of promotion strategies on foreign nurses. The introduction mentioned above aims at exploring more effective and comprehensive promotion strategy, which might provide the theoretical basis for Chinese nursing identity studies.

Objective:To study the effect of sedative combined with cis-atracurium in rapid induction intubation in emergency department.Methods:From October 15, 2017 to April 15, 2019, 52 critically ill patients who needed tracheal intubation in emergency department of the People's Hospital of Changzhi were selected.And the patients were numbered according to the time sequence of enrollment, and then randomly divided into group A and group B according to the random number table, with 26 cases in each group.Group A was given sedatives combined with cis-atracurium to induce rapid intubation.Group B only received sedatives to induce intubation.The success rate of intubation, successful intubation time were compared between the two groups.Before and after endotracheal intubation, the heart rate, mean arterial blood pressure, pulse oxygen concentration and the change of catecholamine concentration were compared.Results:The success rate of intubation in group A was 100.0%, which in group B was 76.9%, the difference between the two groups was statistically significant (χ 2=12.15, P<0.05). The time required for successful intubation in group A was (5.2±0.8)s, which in group B was (8.5±2.5)s, the difference was statistically significant (χ 2=6.41, P<0.05). After intubation, the pulse oxygen concentration in group A was significantly increased compared with before intubation ( t=-7.99, P<0.05). After intubation, the heart rate, mean arterial pressure, and serum norepinephrine, dopamine levels in group A were reduced compared with before intubation, but there were no statistically significant differences (all P>0.05). The serum adrenaline level was higher compared with before intubation, but there was no statistically significant difference ( t=-1.03, P>0.05). In group B, the pulse oxygen concentration was significantly increased after intubation compared with before intubation ( t=5.74, P<0.05), but the heart rate, mean arterial pressure, and the change of blood catecholamine concentration levels in group B had no statistically significant differences ( P>0.05). Conclusion:In the airway management of critically ill patients in emergency department, the application of sedatives combined with cis-atracurium to rapidly induce intubation can improve the hypoxia symptoms of patients more rapidly and can keep patients' hemodynamics, catecholamine concentration is relatively stable, it has the characteristics of safety and efficiency.

Objective To evaluate the efficacy of Disposcope endoscope(DE)-guided nasotrache-al intubation in patients with difficult airway by comparing with fiberoptic bronchoscope(FOB). Methods One hundred and twenty American Society of Anesthesiologists physical statusⅠ-Ⅲ patients of both se-xes, with body mass index<25 kg∕m2, aged 18-64 yr, with mouth opening<3 cm, of Mallampati classifi-cation Ⅲ or Ⅳ, undergoing maxillofacial surgery requiring nasotracheal intubation were divided into DE group(n=60)and FOB group(n=60)using a random number table.Nasotracheal intubation was per-formed under the guidance of DE or FOB after induction of anesthesia.Glottis exposure was evaluated using Cormack-Lehane grade.Epistaxis during intubation, successful intubation, time and degree of glottis expo-sure, intubation time and development of tachycardia and hypertension and requirement for assisted ventila-tion with face mask during intubation were recorded.The patients were followed up postoperatively, and the development of intubation-related complications was also recorded.Results Compared with group FOB, glottis exposure time and incubation time were significantly shortened(P<0.05), and no significant change was found in Cormack-Lehane grade, rate of successful incubation, rate of successful intubation at first attempt or intubation-related complications in group DE(P>0.05). Hypertension and tachycardia were not found and no patients required assisted ventilation with face mask during intubation in the two groups.Conclusion DE-guided nasotracheal intubation provides similar efficacy to that of FOB with shorter time and is an optimal selection for the patients with difficult airway.

Objective:To summarize and elucidate the impact of ambient air pollution on biological aging among middle-aged and older adults.Methods:"Air pollution""Biological age""Epigenetic age""Biological aging"and"Epigenetic aging", as well as specific names of air pollutants and biological age were used as search keywords. This study searched the databases of PubMed and Web of Science for eligible English articles and CNKI, CQVIP, Wanfang, CBM, CSTP and other Chinese databases for eligible Chinese articles from inception until June 30, 2023. The language was limited to Chinese and English.Results:Among the 14 included articles, five studies investigated the impact of air pollution on DNA methylation age using different algorithms, while six studies explored the relationship between air pollutants and telomere length. Six studies focused on frailty as an outcome, and an additional study revealed the relationship between fine particulate matter (PM 2.5) and its components with composite indicator age (KDM age). The results indicated that, although different forms of biological ages were susceptible to different ambient air pollutants at different degrees, previous studies had consistently found that the increased levels of PM 2.5 and one of its major components, black carbon (BC), could significantly accelerate the biological aging of middle-aged and older adults. Similar trends were observed with nitrogen oxides (NO x) and ozone (O 3) but with relatively limited evidence. Conclusion:Major air pollutants could accelerate the biological aging of middle-aged and older adults.

Objective:To summarize and elucidate the impact of ambient air pollution on biological aging among middle-aged and older adults.Methods:"Air pollution""Biological age""Epigenetic age""Biological aging"and"Epigenetic aging", as well as specific names of air pollutants and biological age were used as search keywords. This study searched the databases of PubMed and Web of Science for eligible English articles and CNKI, CQVIP, Wanfang, CBM, CSTP and other Chinese databases for eligible Chinese articles from inception until June 30, 2023. The language was limited to Chinese and English.Results:Among the 14 included articles, five studies investigated the impact of air pollution on DNA methylation age using different algorithms, while six studies explored the relationship between air pollutants and telomere length. Six studies focused on frailty as an outcome, and an additional study revealed the relationship between fine particulate matter (PM 2.5) and its components with composite indicator age (KDM age). The results indicated that, although different forms of biological ages were susceptible to different ambient air pollutants at different degrees, previous studies had consistently found that the increased levels of PM 2.5 and one of its major components, black carbon (BC), could significantly accelerate the biological aging of middle-aged and older adults. Similar trends were observed with nitrogen oxides (NO x) and ozone (O 3) but with relatively limited evidence. Conclusion:Major air pollutants could accelerate the biological aging of middle-aged and older adults.

Micro-computed tomography(Micro-CT)is a non-invasive technology that is widely used in animal experiments to assist in the detection of bone,lung,oral,metabolic,middle and inner ear diseases,as well as tumors,and in other animal disease models.The technique can provide diverse scientific and reliable imaging data for animal experiments and has accordingly become an indispensable experimental method in animal experiments.In this review,we introduce the imaging principles of Micro-CT,review its application in the study of animal disease models,summarize the limitations of Micro-CT technology,and consider its future prospects.

Objective:To investigate the types, surgical treatments of complex intestinal fistula after radiotherapy for cervical cancer.Methods:The clinical data and treatment of 26 patients with complex intestinal fistula after radiotherapy for cervical cancer at Cancer Hospital of Zhengzhou University from Jan 2013 to Jan 2020 were reviewed .Results:Eleven patients were with recto-vaginal fistula, 1 patient with sigmoido-vesical fistula, 5 patients with combined rectal, vaginal and vesical fistula, 7 patients with low rectal fistula and peripheral infection, and 2 patients with ileo-vaginal stump fistula after radical resection of cervical cancer and adjuvant radiotherapy. All patients were underwent the surgery, including 9 patients for total pelvic or posterior pelvic resection, 6 patients for rectum or sigmoid colectomy, bladder or vaginal repair, 7 patients were done for Hartmann surgery, and 1 patient underwent segmental resection, enteroanastomosis and vaginal repair, 3 patients for transverse colostomy or proximal ileostomy. No major postoperative complications occurred . The symptoms of intestinal fistula in all patients were dissolved, and the perineal pain was significantly relieved in 23 patients. The symptoms of ileal fistula reccurred in 2 patients within 1 year after operation, and there was no mortality.Conclusions:The rectal related intestinal fistula is the most common complex intestinal fistula after radical radiotherapy for cervical cancer. The point of surgical treatment is to remove the diseased rectum or ileum.