Objective To provide safety reference for the development of anti-cancer drugs by evaluating thetoxicological safety of the anticancer bioactive fraction AMH-T of lichen through the understanding of its poisonous nature and the intensity.Methods Acute toxicity test,bone marrow micronucleus test in mice,sperm malformation test in rats,Ames test and short-term repeat drug test in mice were conducted.Results Male mice were injected LD50 of 147 mg/kg and female mice 171 mg/kg.Conclusion Injection of AMH-T has acute toxicity and liver toxicity,but has no genetic toxicity.

Objective To investigate the effects of anticancer bioactive fraction AMH-T of lichen on blood routine,organ coefficient and organ morphology by canying out short-term repeated dose toxicity test in rat so as to provide evidence for the development of anticancer drugs.Methods The nude mice were randomly divided into 5 groups:DDP group,DMSO group,and three AMH-T groups with the dosage of 50mg/kg,100mg/kg,and 200 mg/kg respectively.The weights of the mice were recorded every four days.At the end of the experiment,automatic biochemical analyzer and blood cell analyzer were applied to detect the serum biochemical indicators and blood routine indexes.The mice were dissected to observe the pathological changes in main organs.Heart,liver,spleen,kidney and testicle were weighed for organ coefficient calculation.Results In short-term repeated dose toxicity test,AMH-T significantly increased blood ALT and AST levels (P＜0.01) and significant change was found in other blood biochemical indexes and blood routine indexes.AMH-T had no obvious effect on weight,development of heart,liver,spleen,kidney and testicle.Conclusion When subcutaneous injection is performed,AMH-T shows hepatotoxicity,but it shows no toxicity on bone marrow hematopoietic function.

Objective: To analyze characteristics of virus infections in patients with acute exacerbations of chronic obstructive pulmonary disease (COPD), and to analyze the role of virus infection in acute exacerbations of COPD. Methods: Totally 193 patients of COPD with acute exacerbations admitted to the Hospital of Sichuan Provincial Armed Police Force from April 2015 to March 2016 were enrolled as group A, and 50 patients of COPD in stable stage in the same period were enrolled as group B. IgM antibodies to respiratory syncytial virus, adenovirus, parainfluenza virus, influenza A virus, and influenza B virus in two groups were detected. General conditions and total virus infection rate were analyzed. Infection rates of each virus in group A were calculated. Proportion of single virus infection, two virus infections and several virus infections in group A with virus infection were calculated. Virus infection rates in different seasons in group A were also analyzed. Results: There was no significant difference in age, sex, and course of disease between the two groups(P>0.05). The virus infection rate of group A was 13.47%, which was higher than that of group B(χ²=5.29, P<0.05). The most common virus found in group A was influenza B virus(infection rate 12.44%), followed by influenza A virus(infection rate 7.78%), parainfluenza virus(infection rate 7.25%), adenovirus(infection rate 2.63%), respiratory syncytial virus(infection rate 1.32%). Single virus infection accounted for 34.6% of acute exacerbation COPD patients with virus infection, and two virus infections accounted for 15.4%, and three or more virus infections accounted for 50%. Virus infection rate in summer and autumn were higher than that in winter and spring, but the differences were not statistically significant(P>0.05). Conclusions This study showed that 14.37% of patients with acute exacerbations of COPD had viral infections, and most of them were infected with two or more viruses. Virus infection may play an important role in the acute exacerbation of COPD, and we need to pay attention to the prevention and treatment of virus infection in patients with COPD.

Dental operating microscope is recommended to complicated root canal therapy, for it could provide increased lighting and superior magnification, so that the survival rate of tooth is highly increased. More refined access of cavity preparation, canal cleaning, shaping and obturating are realized under microscope. This article combined literature reviews with the writers’ clinical experience, and it aims at helping clinicians to improve their ability to more accurately performance and minimally invasive endodontic procedures, such as locating hidden canals obstructed by calcifications, canals reduced in size, removing materials, reducing ledge formation, apical transportation, and repairing perforations.

Objective:To provide scientific basis for prevention and control measures of island regions through analyzing the characteristics of malignant tumor incidence and mortality in eastern island areas of China and comparing the data with the national cancer mortality data in the same period. Methods:Using the incidence and mortality data of malignant tumor in Daishan county,Zhoushan collected by the Daishan Center for Disease Control and Prevention(CDC)from 2014 to 2019,which was stratified by gender,the crude incidence rates(CIR)and crude mortality rates(CMR)were calculated,and the top 10 malignant tumors with the highest incidence or mortality rates were then ranked.The Segi's world standard population was used to calculate the age-standardized incidence(ASIR)and age-standardized mortality rate(ASMR).The local data were compared with the national cancer mortality data from 2014 to 2019,and Chi-square test was used to analyze the differences between these two sets of data using the SPSS software.The difference was considered statistically significant when P<0.05. Results:There was a total of 7 305 incidence cases of malignant tumors in Daishan county,Zhoushan from 2014 to 2019.The CIR was 662.39/105 and the ASIR was 306.81/105.Notably,the CIR was the highest in the age group of 75-79 years old.The top 5 malignant tumors with the highest incidence rates were lung cancer(27.15％),gastric cancer(12.76％),liver cancer(10.95％),colorectal cancer(6.92％)and breast cancer(5.42％),whose ASIR were 75.09/105,32.06/105,31.01/105,17.81/105 and 18.36/105,respectively.There was a total of 3 412 mortality cases of malignant tumors in Daishan county,Zhoushan from 2014 to 2019.The CMR was 309.39/105 and the ASMR was 122.73/105.Notably,the CMR was the highest in the age group of 80-85 years old.The top 5 malignant tumors with the highest mortality rates were lung cancer(24.94％),liver cancer(18.64％),gastric cancer(17.00％),colorectal cancer(7.56％)and esophageal cancer(5.72％),whose ASMR were 29.65/105,24.97/105,19.01/105,8.75/105 and 6.60/105,respectively.The total ASMR of malignant tumors in Daishan county,Zhoushan was higher than national total ASMR from 2014 to 2019(100.34/105)(P<0.001).Specifically,the ASMR of gastric cancer,lung cancer and colorectal cancer in Daishan county were significantly higher than national levels(gastric cancer:12.46/105;liver cancer:16.45/105;colorectal cancer:6.63/105)(P<0.01),whereas no significant difference in the ASMR of lung cancer and esophageal cancer between Daishan county and the whole nation(lung cancer:28.06/105;esophageal cancer:7.61/105)was observed. Conclusion:Lung cancer,gastric cancer,liver cancer and colorectal cancer were malignant tumors with higher incidence and mortality rates in Daishan county,Zhoushan from 2014 to 2019.Particularly,the ASMR of gastric cancer,liver cancer and colorectal cancer were significantly higher than the national levels,and these malignant tumors should be considered as the major focus of cancer prevention and control.

Objective The oxidative damage of DNA can be caused by excessive levels of Reactive oxygen species(ROS).Monitoring of DNA oxidative damage enables effective evaluation of ROS damage effects.Although the detection of DNA damage effects based on microbial sensor allows quantitative analysis of oxidative damage,the ROS clearance mechanism existed in bacterial will affect the sensitive of detection.The work of this article is to knockout the key genes of ROS clearance mechanism and construct an antioxidant gene-knock-out microbial sensor.The microbial sensor can realize sensitive monitoring of DNA damage effects and then evaluates the damage effects of cells by ROS.Methods The antioxidant damage genes of bacterial ahpCF,katE and katG were knocked out by λ-Red homologous recombination and antioxidant gene-knockout microbial sensor was constructed.The nalidixic acid sodium salt and UV irradiation were used to characterize the performance for monitoring of DNA damage effects.Results The antioxidant gene-knockout microbial sensors ΔahpC,ΔahpCF/ΔkatEG and ΔahpCF/ΔkatE/ΔkatG were constructed successfully.The results showed that the microbial sensor ΔahpCF/ΔkatE/ΔkatGl had the highest sensitive of damage effects and the limit of detection for nalidixic acid sodium salt was 0.40 μmol/L.In addition,1.80 min of UV irradiation(254 nm)was sufficient to induce a significant fluorescent expression effect in the engineered bacteria.Conclusion In this article,antioxidant gene-knockout microbial sensors had been constructed to realize active and sensitive monitoring of DNA damage effects such as DNA damage reagents and UV irradiation.The sensors could provide an active,effective,and sensitive potential monitoring method for future evaluation of radiation effects in space.

Objective:To construct the content framework of the rehabilitation management application (APP) for patients with urinary incontinence after radical prostatectomy, so as to provide an effective network management platform for the rehabilitation management of patients wither urinary incontinence after radical prostatectomy.Methods:From November 2020 to May 2021, the content framework of rehabilitation management APP for patients with urinary incontinence after radical prostatectomy was initially constructed through literature review and group discussion. The objective sampling was used to select 15 experts from Beijing, Shanghai and other regions for two rounds of expert consultation, to construct the content framework of rehabilitation management APP for patients with urinary incontinence after radical prostatectomy.Results:Among two rounds of expert consultation, the effective recovery rates of the questionnaires were all 100.00% (15/15) , and the expert authority coefficients were 0.937 and 0.934, respectively. The Kendall harmony coefficients of all indicators in the second round of expert consultation ranged from 0.208 to 0.333, and the differences were all statistical (all P<0.01) . It was finally determined that the content framework of rehabilitation management APP for patients with urinary incontinence after radical prostatectomy included 3 first-level indicators, 10 second-level indicators, 43 third-level indicators, and 62 fourth-level indicators. Conclusions:The content framework of constructed rehabilitation management APP for patients with urinary incontinence after radical prostatectomy is highly scientific and practical, and can provide corresponding evidence.

Objective:To conduct visualization analysis on the literature on dietary restriction(DR)regulating inflammation based on CiteSpace and VOSviewer visualization software,and to explore research hotspots and trends in this field.Methods:The literature on DR regulation inflammation in Web of Science core databases from January 1 2010 to September 29 2022 were searched.CiteSpace and VOSviewer visualization software was used to conduct quantitative and visual analysis of the annual publication volume,countries,institutions,authors,citation frequency and keywords of the retrieved literature.Results:A total of 1 344 papers related to the topic were included,and the annual number of papers was generally on the rise,with the highest citation frequency of 1 676 times.The United States(481 papers)is the country with the largest number of publications,followed by China(181 papers).The research hotspots in this field focused on calorie restriction(CR),ketogenic diet,aging,metabolic diseases,adipose tissue and gut microbiota.Conclusion:DR regulation of inflammation is increasingly favored by international and domestic researchers,and future research hotspots may be CR mimics(CRMs),intestinal microbiota,neurodegenerative diseases and cardiovascular diseases.The overall research trend is to further clarify the anti-inflammatory mechanism of DR,find new therapeutic targets,and conduct more rigorous clinical trials with more effective regimens that have been proven in vitro and animal models.

As a potential vectored vaccine,Newcastle disease virus(NDV)has been subject to various studies for vaccine development,while relatively little research has outlined the immunomodulatory effect of the virus in antigen presentation.To elucidate the key inhibitory factor in regulating the interaction of infected dendritic cells(DCs)and T cells,DCs were pretreated with the NDV vaccine strain LaSota as an inhibitor and stimulated with lipopolysaccharide(LPS)for further detection by enzyme-linked immunosorbent assay(ELISA),flow cytometry,immunoblotting,and quantitative real-time polymerase chain reaction(qRT-PCR).The results revealed that NDV infection resulted in the inhibition of interleukin(IL)-12p40 in DCs through a p38 mitogen-activated protein kinase(MAPK)-dependent manner,thus inhibiting the synthesis of IL-12p70,leading to the reduction in T cell proliferation and the secretion of interferon-γ(IFN-γ),tumor necrosis factor-α(TNF-α),and IL-6 induced by DCs.Consequently,downregulated cytokines accelerated the infection and viral transmission from DCs to T cells.Furthermore,several other strains of NDV also exhibited inhibitory activity.The current study reveals that NDV can modulate the intensity of the innate?adaptive immune cell crosstalk critically toward viral invasion improvement,highlighting a novel mechanism of virus-induced immunosuppression and providing new perspectives on the improvement of NDV-vectored vaccine.

Objective:To analyze the effect of birth parity on life expectancy (LE) and healthy life expectancy (HLE) among rural women.Method:A total of 15 304 women aged 40 to 79 years who participated in baseline and follow-up surveys were selected from a rural cohort in Henan province. The LE and HLE of women with different birth parity were calculated by using multi-state life table.Results:There were 1 195 (7.8%), 7 782 (50.8%), 3 867 (25.3%) and 2 460 (16.1%) women with 1, 2, 3 and 4 birth parities, respectively, and the M ( Q1 and Q3) of age were 50.3 (47.3, 53.4) and 53.3 (48.8, 60.7), 62.6 (55.4, 66.9) and 69.5 (64.7, 73.4) years old, respectively. LE at 40 years old was 44.5, 44.8, 45.1 and 45.4 years old, and HLE was 17.7, 18.3, 18.8 and 19.3 years old, respectively. LE at age 40 increased by 0.3, 0.6, and 0.9 years in women with 2, 3, and 4 birth parities or more and HLE increased by 0.5, 1.1, and 1.6 years, respectively, compared with women with 1 birth parity. For women with higher and lower socioeconomic status who had 4 birth parities or more, the LE at age 40 was 47.1 and 43.9 years, respectively, an increase of 0.2 and 0.1 years over women with 1 birth parity, respectively; and the HLE was 20.4 and 18.7 years, respectively, an increase of 1.4 and 1.3 years over women with 1 birth parity, respectively. Conclusion:LE and HLE show an upward trend with the increase of birth parity among rural women.