Exosome-derived microRNA with bone and joint diseases:role and mechanism / 中国组织工程研究

BACKGROUND:Exosomes are vesicle-like structures secreted by cells into extracellular compartments in the form of cytosol,which contain a large amount of microRNAs with important intercellular communication roles.MicroRNAs in exosomes rely on exosome transport and are able to enter target cells to exert important biological regulatory effects.In common bone and joint diseases,abnormal or damaged bone metabolism releases a large number of exosomes,while some exosome-derived microRNAs also promote the progression of osteoarthritis.Therefore,exosome-derived microRNAs are closely related to the skeletal system and are important for the development as well as diagnosis and treatment of many osteoarticular diseases. OBJECTIVE:To review the research progress of exosome-derived microRNAs in bone metabolism and bone and joint diseases. METHODS:Using"exosomes,extracellular vesicle,microRNA,miRNA,bone,bone diseases,bone formation,bone regeneration,bone resorption,bone destruction"as Chinese and English search terms,articles were searched on CNKI,Metasys,and PubMed databases.Finally,86 articles were included for summarization. RESULTS AND CONCLUSION:Exosome-derived microRNAs can regulate bone metabolism by affecting bone formation and bone resorption,and are closely related to the development of bone and joint diseases such as fracture healing,osteoporosis,osteoarthritis,rheumatoid arthritis,osteonecrosis of the femoral head,and osteosarcoma.Exosome-derived microRNAs will be an effective means of diagnosis and treatment of certain bone and joint diseases in the future.However,the current research on exosome-derived microRNAs in osteoarthritic diseases is limited,and more explorations and researches are still needed to diagnose and treat osteoarthritic diseases using exosome-derived microRNAs.

Challenges and Thoughts on Improving Subject Protection during the Period of Rapid Development of Biomedical Technology / 中国医学伦理学

With the development of technologies such as gene editing, artificial intelligence, and big data, cutting-edge technologies have brought increasing ethical risks in medical research, and the ability to protect subjects has become increasingly inadequate. However, the current means of ethical governance are relatively weak, the ethical awareness of researchers is not strong, and existing ethical governance methods can no longer meet the needs of new technological developments. Therefore, combined with the Guidelines to Strengthen Governance over Ethics in Science and Technology issued by the General Office of the CPC Central Committee and the General Office of the State Council in March 2022, this paper proposed that subject protection needed to be improved from the following aspects: improving regulations and systems, strengthening the construction of ethics committees, conducting research on ethical governance methods, raising the quality of ethics committees, constructing regional ethics systems, and improving the ethical literacy of researchers. To carry out the above work, it is necessary for the government, ethical professional organizations, research institutions, biomedical enterprises, medical institutions, and the public to explore the "ethical pre-examination" management model with the concept of "prevention", so as to improve the subject protection in the modern society with the continuous development of new technologies.

Association between serum lysophosphatidylcholine level and elderly health index in older people from longevity areas of Guangxi Province / 中华预防医学杂志

Objective: To investigate the relationship between serum lysophosphatidylcholine (LPC) level and the health index of the elderly. Methods: A total of 251 subjects were selected from the 2016 baseline survey of the Yongfu Longevity Cohort in Guangxi Province among whom 66, 63 and 122 were in the young and middle-aged group (≤59 years old), the young group (60-89 years old) and the longevity group (≥90 years old), respectively. Demographic data were collected and related indicators of height, weight, blood pressure and lipid metabolism were measured. The cognitive and physical functions of the elderly were assessed by the results of the simple mental state scale and the daily living activity scale to construct the health index of the elderly. The serum levels of LPC16∶0, LPC18∶0, LPC18∶1 and LPC18∶2 were determined by liquid chromatography-tandem mass spectrometry, and the differences among different ages and health status groups were compared. The logistic regression model was used to analyze the relationship between the serum LPC level and the health index of the elderly. Results: With the increase in age, the proportion of female subjects increased, and the rate of smoking and drinking decreased. BMI, TC, TG, LDL-C, diastolic blood pressure, and the four LPCs levels decreased with the increase of age, and systolic blood pressure levels increased with the increase of age (all P values<0.05). There was no significant difference in HDL-C levels among age groups (P>0.05). With the decline of health status in the elderly, serum levels of LPC16∶0, LPC18∶0, LPC18∶1 and LPC18∶2 showed a downward trend (all P values<0.001). After adjusting for age and gender, only LPC18∶0 was associated with the health status in old age [OR (95%CI): 0.48 (0.25-0.92)]. For every 1 standard deviation (16.87 nmol/L) increase in serum LPC18∶0 concentration, the risk of poor health status in old age decreased by 52%. Conclusion: Serum LPC18∶0 was associated with the health status in old age independent of age and sex.

Research progress on main disease-related factors of healthy life expectancy / 中华预防医学杂志

International research on healthy life expectancy (HALE) focuses on inequality of socioeconomic status and individual natural attributes. With the acceleration of population ageing and the increase in average life expectancy, the extension of unhealthy life expectancy and the increase of social and economic burden caused by diseases have gradually attracted the attention of countries around the world. Therefore, the evaluation of disease factors affecting HALE is a meaningful direction in the future. This study introduces the development process and commonly used measurement methods of HALE. According to the definition of health from the Global Burden of Disease Study and World Health Organization, physical and mental diseases such as cardiovascular and cerebrovascular diseases, chronic respiratory diseases, diabetes, malignant tumors and depression were selected to summarize the impact of these diseases and pre-disease states on HALE. It is expected to provide a theoretical basis for the formulation of relevant public health policies and the improvement of quality of life in China.

Spatial distribution of cognitive dysfunction and its risk factors in Chinese population aged 45 years and above / 南方医科大学学报

OBJECTIVE@#To analyze the spatial distribution of the prevalence of cognitive dysfunction and its risk factors in Chinese population aged 45 years and above to provide evidence for formulating regional prevention and control strategies.@*METHODS@#The study subjects with complete cognitive function data were selected from the follow-up data of the China Health and Retirement Longitudinal Study (CHARLS) Phase IV. ArcGis 10.4 software was used for spatial analysis of the prevalence of cognitive dysfunction in the population aged 45 years and above for each province based on the geographic information system (GIS) technology.@*RESULTS@#In 2018, the overall prevalence of cognitive dysfunction was 33.59% (5951/17716) in individuals aged 45 and above in China. Global spatial autocorrelation analysis indicated a spatial clustering and a positive autocorrelation (P < 0.001) of the prevalence of cognitive dysfunction in the study subjects, with a Moran's I value of 0.333085. The results of local spatial autocorrelation analysis showed that the southwestern region of China was the main aggregation area of patients with cognitive dysfunction. Geographically weighted regression analysis suggested that a male gender, an advanced age, and illiteracy were the major risk factors for cognitive dysfunction (P < 0.05). These 3 risk factors showed a spatial distribution heterogeneity with greater impact in the northern, western, and northwestern regions of China, respectively.@*CONCLUSION@#The prevalence of cognitive dysfunction is relatively high in individuals aged 45 years and above in China. A male gender, an advanced age, and illiteracy are the major risk factors for cognitive dysfunction and show different spatial distribution patterns, with the northern, western and northwestern regions of China as the key areas for prevention and control, where the prevention and control measures should be designed based on local conditions.

Spatial clustering analysis of scarlet fever incidence in China from 2016 to 2020 / 南方医科大学学报

OBJECTIVE@#To investigate the incidence trend and spatial clustering characteristics of scarlet fever in China from 2016 to 2020 to provide evidence for development of regional disease prevention and control strategies.@*METHODS@#The incidence data of scarlet fever in 31 provinces and municipalities in mainland China from 2016 to 2020 were obtained from the Chinese Health Statistics Yearbook and the Public Health Science Data Center led by the Chinese Center for Disease Control and Prevention.The three-dimensional spatial trend map of scarlet fever incidence in China was drawn using ArcGIS to determine the regional trend of scarlet fever incidence.GeoDa spatial autocorrelation analysis was used to explore the spatial aggregation of scarlet fever in China in recent years.@*RESULTS@#From 2016 to 2020, a total of 310 816 cases of scarlet fever were reported in 31 provinces, municipalities directly under the central government and autonomous regions, with an average annual incidence of 4.48/100 000.The reported incidence decreased from 4.32/100 000 in 2016 to 1.18/100 000 in 2020(Z=103.47, P < 0.001).The incidence of scarlet fever in China showed an obvious regional clustering from 2016 to 2019(Moran's I>0, P < 0.05), but was randomly distributed in 2020(Moran's I>0, P=0.16).The incidence of scarlet fever showed a U-shaped distribution in eastern and western regions of China, and increased gradually from the southern to northern regions.Inner Mongolia Autonomous Region and Hebei and Gansu provinces had the High-high (H-H) clusters of scarlet fever in China.@*CONCLUSION@#Scarlet fever still has a high incidence in China with an obvious spatial clustering.For the northern regions of China with H-H clusters of scarlet fever, the allocation of health resources and public health education dynamics should be strengthened, and local scarlet fever prevention and control policies should be made to contain the hotspots of scarlet fever.

Efficacy and safety of flurbiprofen cataplasms versus loxoprofen sodium cataplasms in knee osteoarthritis: a randomized controlled trial / 中华医学杂志(英文版)

BACKGROUND@#Clinical trial evidence is limited to identify better topical non-steroidal anti-inflammatory drugs (NSAIDs) for treating knee osteoarthritis (OA). We aimed to compare the clinical efficacy and safety of flurbiprofen cataplasms (FPC) with loxoprofen sodium cataplasms (LSC) in treating patients with knee OA.@*METHODS@#This is an open-label, non-inferiority randomized controlled trial conducted at Peking University Shougang Hospital. Overall, 250 patients with knee OA admitted from October 2021 to April 2022 were randomly assigned to FPC and LSC treatment groups in a 1:1 ratio. Both medications were administered to patients for 28 days. The primary outcome was the change of pain measured by visual analog scale (VAS) score from baseline to day 28 (range, 0-10 points; higher score indicates worse pain; non-inferiority margin: 1 point; superiority margin: 0 point). There were four secondary outcomes, including the extent of pain relief, the change trends of VAS scores, joint function scores measured by the Western Ontario and McMaster University Osteoarthritis Index (WOMAC), and adverse events.@*RESULTS@#Among 250 randomized patients (One patient without complete baseline record in the flurbiprofen cataplasms was excluded; age, 62.8 ± 10.5 years; 61.4% [153/249] women), 234 (93.6%) finally completed the trial. In the intention-to-treat analysis, the decline of the VAS score for the 24-h most intense pain in the FPC group was non-inferior, and also superior to that in the LSC group (differences and 95% confidence interval, 0.414 (0.147-0.681); P <0.001 for non-inferiority; P = 0.001 for superiority). Similar results were observed of the VAS scores for the current pain and pain during exercise. WOMAC scores were also lower in the FPC group at week 4 (12.50 [8.00-22.50] vs . 16.00 [11.00-27.00], P = 0.010), mainly driven by the dimension of daily activity difficulty. In addition, the FPC group experienced a significantly lower incidence of adverse events (5.6% [7/124] vs . 33.6% [42/125], P <0.001), including irritation, rash and pain of the skin, and sticky hair uncovering pain.@*CONCLUSIONS@#This study suggested that FPC is superior to LSC for treating patients with knee OA in pain relief, joint function improvement, and safety profile.

Effect and mechanism of ubiquitin-like protein FAT10 on AngⅡ induced endothelial cell inflammation / 中华心血管病杂志

Objective: To investigate the role and related mechanism of ubiquitin-like protein FAT10 in the angiotensin Ⅱ (AngⅡ)-induced endothelial cell inflammatory responses. Methods: The Western blot was used to detect the protein expression of FAT10 in 16-weeks old WKY rat carotid artery, thoracic aorta artery, renal artery and vascular smooth muscle cells (VSMC), human umbilical vein endothelial cells (HUVEC) and human breast cancer cells (MDA-MB-231). The optimal concentration and stimulation time of AngⅡ on inducing the highest FAT10 in HUVEC were determined. The following plasmids were constructed: control plasmid, overexpression FAT10 plasmid (Flag-FAT10), invalid interference plasmid, and interference FAT10 plasmid (sh-FAT10). These plasmids were then transfected into HUVEC cells and divided into following groups: control group, Flag-FAT10 group, invalid interference group, and sh-FAT10 group. After culturing with 100 nmol/L AngⅡ for 36 h, the control group and the Flag-FAT10 group were treated with reactive oxygen species scavenger N-acetyl-L-cysteine ​​(NAC), the protein expression levels of the inflammatory factor monocyte chemotactic protein-1 (MCP-1) and tumor necrosis factor-α (TNF-α) were measured. Laser confocal microscopy was used to detect the generation levels of reactive oxygen species in the cells of vrious groups. Results: FAT10 was expressed in carotid artery, thoracic aorta, and renal artery of normal blood pressure rats and expressed in HUVEC, VSMC, MDA-MB-231. The expression level of FAT10 gradually increased in proportion to the increase of the time and concentration of AngⅡ stimulation in HUVEC, and the expression level of FAT10 was the highest when the HUVEC was treated with 100 nmol/L AngⅡ for 36 h (P<0.01). The protein expression level of MCP-1 (P<0.001) and TNF-α (P<0.01) was higher in AngⅡ treated HUVEC with FAT10 overexpression, while the expression level of MCP-1 and TNF-α protein was lower in AngⅡ treated HUVEC with FAT10 knockdown (all P<0.01). The level of intracellular reactive oxygen species (ROS) production was significantly increased with FAT10 overexpression (P<0.001), and the level of ROS was decreased when the expression of FAT10 was interfered (P<0.05). The increased level of MCP-1 and TNF-α proteins in FAT10 overexpressed HUVEC was reversed by NAC (all P<0.05). Conclusion: FAT10 promotes the release of inflammatory factors induced by AngⅡ in endothelial cells by increasing the level of intracellular ROS production.

Effect and mechanism of ubiquitin-like protein FAT10 on AngⅡ induced endothelial cell inflammation / 中华心血管病杂志

Objective: To investigate the role and related mechanism of ubiquitin-like protein FAT10 in the angiotensin Ⅱ (AngⅡ)-induced endothelial cell inflammatory responses. Methods: The Western blot was used to detect the protein expression of FAT10 in 16-weeks old WKY rat carotid artery, thoracic aorta artery, renal artery and vascular smooth muscle cells (VSMC), human umbilical vein endothelial cells (HUVEC) and human breast cancer cells (MDA-MB-231). The optimal concentration and stimulation time of AngⅡ on inducing the highest FAT10 in HUVEC were determined. The following plasmids were constructed: control plasmid, overexpression FAT10 plasmid (Flag-FAT10), invalid interference plasmid, and interference FAT10 plasmid (sh-FAT10). These plasmids were then transfected into HUVEC cells and divided into following groups: control group, Flag-FAT10 group, invalid interference group, and sh-FAT10 group. After culturing with 100 nmol/L AngⅡ for 36 h, the control group and the Flag-FAT10 group were treated with reactive oxygen species scavenger N-acetyl-L-cysteine ​​(NAC), the protein expression levels of the inflammatory factor monocyte chemotactic protein-1 (MCP-1) and tumor necrosis factor-α (TNF-α) were measured. Laser confocal microscopy was used to detect the generation levels of reactive oxygen species in the cells of vrious groups. Results: FAT10 was expressed in carotid artery, thoracic aorta, and renal artery of normal blood pressure rats and expressed in HUVEC, VSMC, MDA-MB-231. The expression level of FAT10 gradually increased in proportion to the increase of the time and concentration of AngⅡ stimulation in HUVEC, and the expression level of FAT10 was the highest when the HUVEC was treated with 100 nmol/L AngⅡ for 36 h (P<0.01). The protein expression level of MCP-1 (P<0.001) and TNF-α (P<0.01) was higher in AngⅡ treated HUVEC with FAT10 overexpression, while the expression level of MCP-1 and TNF-α protein was lower in AngⅡ treated HUVEC with FAT10 knockdown (all P<0.01). The level of intracellular reactive oxygen species (ROS) production was significantly increased with FAT10 overexpression (P<0.001), and the level of ROS was decreased when the expression of FAT10 was interfered (P<0.05). The increased level of MCP-1 and TNF-α proteins in FAT10 overexpressed HUVEC was reversed by NAC (all P<0.05). Conclusion: FAT10 promotes the release of inflammatory factors induced by AngⅡ in endothelial cells by increasing the level of intracellular ROS production.

The Oncolytic Virus Therapy for Non-Small Cell Lung Cancer / 中国生物化学与分子生物学报

Since the oncolytic herpes simplex virus T-VEC was approved in the United States for the treatment of malignant melanoma in 2015, there has been increasing interests in the oncolytic virus therapy. The oncolytic virus therapy also occupies a certain position in the treatment research process of non-small cell lung cancer(NSCLC). Based on the rapid development of genetic engineering and protein engineering, researchers have designed many recombinant oncolytic viruses targeting various specific sites to further improve their targeting and oncolytic effect in order to alleviate symptoms and even cure NSCLC patients. This review introduces the two major classifications of oncolytic viruses, wild type and gene-edited, and how they achieve tumor lysis by specifically targeting and killing tumor cells. We focus on the research progress of oncolytic virus applied alone to treat NSCLC, or combined with chemotherapy, immunotherapies such as chimeric antigen receptor (CAR)-T cell therapy, immune checkpoint inhibitors and other current hot research to treat NSCLC. At the same time, we summarize and discuss the issue of targeted transport, which is of high concern in the academic field of oncolytic virus therapy, and point out that the use of extracellular vesicles as drug carriers has a good potential for development. Finally, we analyze the existing problems and future application prospects in the context of existing basic and clinical studies, to expend new approaches for the treatment of NSCLC, so that it is no longer limited to traditional therapies.

Dose-response relationship between age and Streptococcus pneumoniae vaccination coverage in kindergarten children / 中国当代儿科杂志

OBJECTIVES@#To investigate the potential relationship between age and Streptococcus pneumoniae vaccination coverage in kindergarten children, and to provide a basis for guiding vaccination and developing new protein vaccines.@*METHODS@#The stratified cluster random sampling method was used to select 1 830 healthy children from six kindergartens in Shunde District, Foshan City, China, and nasopharyngeal swabs were collected for the isolation and identification of Streptococcus pneumoniae. The logistic regression model based on restricted cubic spline was used to analyze the dose-response relationship between age and Streptococcus pneumoniae vaccination coverage.@*RESULTS@#The rate of nasal Streptococcus pneumoniae carriage was 22.46% (411/1 830) among the kindergarten children, with the predominant serotypes of 6B, 19F, 15A, 23A, 34, and 23F. The coverage rates of 10-valent pneumococcal conjugate vaccine (PCV10) and 13-valent pneumococcal conjugate vaccine (PCV13) were 53.0% and 57.9%, respectively, and there was a significant non-linear dose-response relationship between age and the coverage rates of PCV10 and PCV13 (P<0.05), with a higher coverage rate of PCV10 (88.0%) and PCV13 (91.1%) in the children aged 2 years. There was a significant non-linear dose-response relationship between age and the coverage rates of pilus islet 1 (PI-1) and pilus islet 2 (PI-2) (P<0.05), with a lower vaccination coverage rate for PI-1 (37.7%) and PI-2 (16.1%). The coverage rates of PI-1 (13.0%-58.5%) and PI-2 (6.0%-29.4%) were lower in all age groups. The virulence genes lytA (99.5%) and ply (99.0%) associated with candidate protein vaccines showed higher vaccination coverage rates.@*CONCLUSIONS@#There is a significant non-linear dose-response relationship between the age of kindergarten children and the coverage rates of PCV10 and PCV13 serotypes, and kindergarten children aged 2 years have a relatively high coverage rate of PCV. The high prevalence of the virulence genes lytA and ply shows that they are expected to become candidate virulence factors for the development of a new generation of recombinant protein vaccines.

Clinical practice, knowledge and attitudes of oncology nurses to the management of gastrointestinal symptoms in cancer chemotherapy and the correlation research of medical and nursing cooperation / 中国实用护理杂志

Objective:To investigate the current situation of clinical practice of cancer chemotherapy-related gastrointestinal symptoms (CGIS) management among oncology nurses in Ningxia, and to explore the correlation between CGIS management and nurses′ knowledge and attitude and medical and nursing cooperation, so as to provide evidence for improving the clinical practice of cancer patients CGIS management among oncology nurses in Ningxia.Methods:This was a cross-sectional study. From January 25 to 31, 2021, the general data questionnaire and the questionnaire of clinical practice of CGIS management for cancer patients were used to survey 289 nurses in oncology department in Ningxia.Results:The scores of medical and nursing cooperation, CGIS knowledge, attitude, and CGIS management clinical practice activities of nurses in oncology department were (24.94 ± 3.20), (20.19 ± 3.82), (52.19 ± 6.17) and (129.93 ± 36.33) points, respectively. Among the scores of CGIS management clinical practice activities, gastrointestinal symptoms evaluation dimension scored the lowest, and the highest was CGIS health education dimension. There was a significant positive correlation between the scores of clinical practice of CGIS management of cancer patients and the scores of knowledge and attitude of oncology nurses ( r values were 0.225-0.293, all P<0.05). Conclusions:The clinical practice of cancer patients′CGIS management by oncology nurses needs to be improved, especially the evaluation of cancer patients′CGIS by oncology nurses. Nursing managers should formulate the activity guide of CGIS management clinical practice as soon as possible, strengthen the training of nurses′ relevant knowledge, and provide nurses with appropriate evaluation tools to improve the clinical practice of CGIS management.

Effect of Rheb1 in the Development of Mouse Megakaryocyte-Erythroid Progenitor Cells / 中国实验血液学杂志

OBJECTIVE@#To investigate the effect of Rheb1 in the development of mouse megakaryocyte-erythroid progenitor cells and its related mechanism.@*METHODS@#Rheb1 was specifically knocked-out in the hematopoietic system of Vav1-Cre;Rheb1fl/fl mice(Rheb1Δ/Δ mice). Flow cytometry was used to detect the percentage of red blood cells in peripheral blood and erythroid cells in bone marrow in Vav1-Cre;Rheb1fl/fl mice and control mice. The CFC assay was used to detect the differentiation ability of Rheb1 KO megakaryocyte-erythroid progenitor cells and control cells. Real-time fluorescence quantification PCR was used to detect the relative expression of PU.1,GATA-1,GATA-2,CEBPα and CEBPβ of Rheb1 KO megakaryocyte-erythroid progenitor cells and control cells. Rapamycin was added to the culture medium, and it was used to detect the changes in cloning ability of megakaryocyte-erythroid progenitor cells from wild-type mice in vitro.@*RESULTS@#After Rheb1 was knocked out, the development and stress response ability of megakaryocyte-erythroid progenitor cells in mice were weaken and the differentiation ability of megakaryocyte-erythroid progenitor cells in vitro was weaken. Moreover, the expression of GATA-1 of megakaryocyte-erythroid progenitor cells was decreased. Further, rapamycin could inhibit the differentiative capacity of megakaryocyte-erythroid progenitor cells in vitro.@*CONCLUSION@#Rheb1 can regulate the development of megakaryocyte-erythroid progenitor cells probably through the mTOR signaling pathway in mice.

Effects of different sputum suction pressure on intracranial pressure of severe craniocerebral injury patients / 中国实用护理杂志

Objective:To explore the best negative pressure standard of sputum aspiration in patients with severe craniocerebral injury, so as to achieve the best sputum aspiration effect and maintain relatively stable intracranial pressure.Methods:Totally 120 patients with severe craniocerebral injury admitted to the Department of Neurosurgery of Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School from January to December 2019 were selected by convenience sampling method. According to the random number table method, patients were divided into 4 different negative pressure sputum aspiration groups: 75 mmHg (1 mmHg=0.133 kPa) group, 100 mmHg group, 150 mmHg group, 200 mmHg group, with 30 patients in each group. The levels of intracranial pressure and SpO 2, sputum cleaning time and mucosal injury were observed and compared in 4 groups: 1 min before sputum aspiration, 1 min after sputum aspiration and during sputum aspiration. Results:Comparison of intracranial pressure and SpO 2 in sputum aspiration among the four groups: intracranial pressure in 200 mmHg group was (22.23 ± 4.80) mmHg, which was higher than 75 mmHg group (16.33 ± 2.71) mmHg, 100 mmHg group (17.70 ± 2.32) mmHg, 150 mmHg group (17.20 ± 2.11) mmHg ( q=8.29, 6.58, 7.23), and SpO 2 was 0.906 ± 0.048, which was lower than 0.956 ± 0.013, 0.946 ± 0.018, 0.952 ± 0.023 in the other three groups ( q=7.81, 6.08, 6.69), with statistical significance (all P<0.01). There were statistically significant differences in intracranial pressure ( F=10.55) and SpO 2 ( F=36.57) among the four groups 1 min after sputum aspiration ( P<0.01);the 200 mmHg group had the highest intracranial pressure (15.63 ± 3.64) mmHg; the 100 mmHg group was (12.50 ± 1.48) mmHg and 150 mmHg group was (12.60 ± 1.00) mmHg, which had lower intracranial pressure than the 75 mmHg group (14.03 ± 2.86) mmHg. The sputum cleaning time was (35.53 ± 5.71) s in 75 mmHg group which was the longest and the shortest in 200 mmHg group (24.27 ± 3.22) s, with statistical significance among the four groups ( F=47.81, P<0.01). The incidence of airway mucosal injury in 200 mmHg group was 33.33% (10/30),which was higher than that in the other three groups, and the difference was statistically significant ( χ2=15.41, P<0.01). Conclusions:For patients with severe craniocerebral injury, artificial airway sputum viscosityⅠ-Ⅱ degree, suction negative pressure of 100-150 mmHg can better maintain the stability of intracranial pressure, control the decline of SpO 2 and prevent the damage of airway mucosa, and effectively reduce the adverse effects of sputum aspiration on patients with severe craniocerebral injury.

Effect of Extracts from Veronica peregrine on Breast Cancer Cell-induced Osteoclastic Bone Metastasis via Inhibiting Runx2 Activation / 中国实验方剂学杂志

ObjectiveTo investigate inhibitory effect of extracts from Veronica peregrina （EVP） on the osteoclastic bone metastasis induced by breast cancer cells. MethodBone metastasis model was established by injection of MDA-MB-231 cells， a human breast cancer cell line， into the left ventricle of BALB/c nude mice. The expression of human cytokeratin-19 （Ck-19） gene in mouse bone marrow was determined by nested polymerase chain reaction（PCR） to assess the bone metastasis of MDA-MB-231 cells. To assess the effects of EVP on the activation of bone marrow macrophages （BMMs）， we counted the multinuclear cells and measured the secretion of Cathepsin K. Western blot was adopted to assess the effects of EVP on receptor activator of nuclear factor-κB （RANK）， Runt-related transcription factor 2 （ Runx2 ）， phosphorylated Runx2 （p-Runx2）， and matrix metalloproteinase-9 （MMP-9） in BMMs. Gelatin zymography was employed to determine the activities of matrix metalloproteinases （MMPs）. ResultCompared with that in the blank group， Ck-19 expression was down-regulated in EVP groups （P<0.05）. The multinucleated cells increased when the BMMs were induced by soluble receptor activator of nuclear factor-κB ligand （sRANKL）， which was inhibited by EVP （P<0.05）. The level of cathepsin K in the supernatant of sRANKL group increased compared with that of the blank group， while EVP groups had lower cathepsin K levels than sRANKL group （P<0.05）. Compared with the blank group， the sRANKL group showed up-regulated RANK expression， Runx2 phosphorylation， and MMP-9 expression （P<0.05）， while the expression levels of RANK， p-Runx2， and MMP-9 were down-regulated when the cells were incubated with EVP （P<0.05）. Furthermore， exposure of BMMs to sRANKL resulted in an increase in gelatin hydrolyzation compared with the blank group （P<0.01）， which， however， was reversed in EVP groups （P<0.05）. ConclusionEVP significantly inhibits bone marrow metastasis of MDA-MB-231 cells， which may be associated with the suppression of osteoclast activation by inhibiting Runx2 phosphorylation.

Representations of object animacy and real-world size in the ventral visual pathway / 生理学报

How the brain perceives objects and classifies perceived objects is one of the important goals of visual cognitive neuroscience. Previous research has shown that when we see objects, the brain's ventral visual pathway recognizes and classifies them, leading to different ways of interacting with them. In this paper, we summarize the latest research progress of the ventral visual pathway related to the visual classification of objects. From the perspective of the neural representation of objects and its underlying mechanisms in the visual cortex, we summarize the current research status of the two important organizational dimensions of object animacy and real-world size, provide new insights, and point out the direction of further research.

Danshen Injection Inhibits SKOV3 Cell Proliferation in Vitro by Interfering with Their Interaction with Platelets / 中国实验方剂学杂志

Objective:To investigate the inhibitory effects of Danshen injection against ovarian cancer cell proliferation induced by the interaction between platelets and cancer cells. Method:The induction of platelets on SKOV3 growth <italic>in vitro</italic> and the inhibitory effect of Danshen injection at 12，24，and 48 g·L^-1 were observed by 3-（4，5-Dimethylthiazol-2-yl）-2，5-diphenyltetrazolium bromide （MTT） and cell colony formation assays. The content of transforming growth factor-<italic>β</italic>₁ （TGF-<italic>β</italic>₁） in the platelet-tumor cell interaction system and platelet supernatant and the effect of Danshen injection on TGF-<italic>β</italic>₁secretion were detected by enzyme-linked immunosorbent assay （ELISA）. The influences of tumor cell culture supernatant on platelet aggregation and secretion and the inhibitory effect of Danshen injection were determined by microplate assay and ELISA. The effects of Danshen injection on platelet nuclear factor kappa B （NF-<italic>κ</italic>B） signaling pathway were assayed by Western Blot. Result:Compared with the blank group， the platelet induction group exhibited significantly elevated absorbance at <italic>A</italic>₅₇₀（<italic>P</italic><0.01）， while the absorbance at <italic>A</italic>₅₇₀ in the platelet + Danshen injection group was significantly lower than that in the platelet induction group （<italic>P</italic><0.01）. The comparison with the Danshen injection group revealed that the cell proliferation inhibitory rate in the platelet + Danshen injection group at the same dose was more significant （<italic>P</italic><0.01）. The number of colonies in the platelet induction group was obviously increased in contrast to that in the blank group（<italic>P</italic><0.05）， while the number of colonies in the platelet + Danshen injection group was significantly lower than that in the platelet induction group（<italic>P</italic><0.05，<italic>P</italic><0.01）. As demonstrated by comparison with the blank group， TGF-<italic>β</italic>₁content in the supernatant of the platelet induction group rose remarkably（<italic>P</italic><0.01）， whereas that in the platelet + Danshen injection group declined（<italic>P</italic><0.01）. Compared with the Danshen injection （24 g·L^-1） group， the platelet + Danshen injection group displayed more obvious inhibition（<italic>P</italic><0.01）. Compared with the blank group， Danshen injection significantly reduced the TGF-<italic>β</italic>₁content in platelet supernatant（<italic>P</italic><0.05，<italic>P</italic><0.01）. There was no significant change in the content of TGF-<italic>β</italic>₁in SKOV3 supernatant treated with Danshen injection. The platelet aggregation， thromboxane A₂（TXB₂）， and serotonin （5-HT） secretion in the SKOV3 cell supernatant induction group were significantly increased as compared with those in the blank group （<italic>P</italic><0.01）， while such indexes in the cell supernatant induction + Danshen injection group were obviously decreased （<italic>P</italic><0.01）. Compared with the Danshen injection （24 g·L^-1） group， the cell supernatant induction + Danshen injection group displayed more obvious inhibition at the same dose（<italic>P</italic><0.01）. Compared with the blank group， the platelet induction group exhibited obviously up-regulated phosphorylated TGF-<italic>β</italic>-activated kinase-1 （TAK-1） and NF-<italic>κ</italic>B， but down-regulated phosphorylated inhibitory protein of NF-<italic>κ</italic>B （I<italic>κ</italic>B）（<italic>P</italic><0.01）， which however were significantly reversed in the platelet + Danshen injection group<bold>（</bold><italic>P</italic><0.01）. Conclusion:Danshen injection affect the proliferation of SKOV3 cells by inhibiting their interaction with platelets， which may be related to the inhibited secretion of TGF-<italic>β</italic>₁.

Stability of anterior chamber after implantable collamer lens V4c implantation for one year in moderate and high myopic eyes / 中华实验眼科杂志

Objective:To investigate the stability of anterior chamber following implantable collamer lens (ICL) V4c implantation for one year in moderate and high myopic eyes.Methods:An observational case series study was conducted.Medical data of 19 patients (37 eyes) who received ICL V4c implantation in Xuzhou First People's Hospital from March 2016 to October 2017 were collected.The patients were 20 to 29 years old, with the preoperative spherical equivalent (SE) of -5.875 to -15.750 D, with an average of (-9.743±3.220)D.All eyes were followed up for one year, and the changes of visual acuity, SE and intraocular pressure were observed.Pentacam anterior eye segment analyzer was used to measure the anterior chamber depth (ACD), anterior chamber volume (ACV) and anterior chamber angle (ACA) before operation and at 1 month, 6 months and 1 year after operation, and to evaluate the vaults of the ICL V4c at different time points after implantation.This study protocol adhered to the Declaration of Helsinki and was approved by an Ethics Committee of Xuzhou First People's Hospital (No.xxy11[2015]-XJS-004). Written informed consent was obtained from each subject.Results:There were statistically significant differences in visual acuity between before and after operation ( F=5.057, P=0.007), and the one-year postoperative uncorrected visual acuity (UCVA) was significantly better than the best corrected visual acuity (BCVA) before operation ( P<0.05). There were no significant differences in SE and intraocular pressure among different time points ( F=1.294, 1.302; both at P>0.05). There were significant differences in ACD, ACV and ACA among different time points ( F=44.811, 889.971, 196.096; all at P<0.001). ACD, ACV and ACA at 1 month, 6 months and 1 year after operation were significantly lower than those before operation (all at P<0.001). There was a significant difference in the 1-month, 6-month and 1-year postoperative ICL vault ( F=7.256, P=0.001). The ICL vault at 1 year after operation was (433.784±168.550)μm, which was significantly decreased in comparison with (484.860±183.634)μm at 1 month and (464.351±170.167)μm at 6 months after operation ( P=0.006, 0.041). Conclusions:The anterior chamber is stable in one year after ICL V4c implantation, and the UCVA is better than preoperative BCVA.ICL V4c is safe and effective for moderate and high myopia.

A combined quality evaluation method that integrates chemical constituents, appearance traits and origins of raw Rehmanniae Radix pieces / 中国天然药物

The quality control of Chinese herbal medicine is a current challenge for the internationalization of traditional Chinese medicine. Traditional quality evaluation methods lack quantitative analysis, while modern quality evaluation methods ignore the origins and appearance traits. Therefore, an integrated quality evaluation method is urgent in need. Raw Rehmanniae Radix (RRR) is commonly used in Chinese herbal medicine. At present, much attention has been drwan towards its quality control, which however is limited by the existing quality evaluation methods. The present study was designed to establish a comprehensive and practical method for the quality evaluation and control of RRR pieces based on its chemical constituents, appearance traits and origins. Thirty-three batches of RRR pieces were collected from six provinces, while high-performance liquid chromatography (HPLC) was applied to determine the following five constituents, including catalpol, rehmannioside A, rehmannioside D, leonuride and verbascoside in RRR pieces. Their appearance traits were quantitatively observed. Furthermore, correlation analysis, principal components analysis (PCA), cluster analysis and t-test were performed to evaluate the qualities of RRR pieces. These batches of RRR pieces were divided into three categories: samples from Henan province, samples from Shandong and Shanxi provinces, and those from other provinces. Furthermore, the chemical constituents and appearance traits of RRR pieces were significantly different from diverse origins. The combined method of chemical contituents, appearance traits and origins can distinguish RRR pieces with different qualities, which provides basic reference for the quality control of Chinese herbal medicine.

Nutritional Knowledge and Skills of Fast-food Takeout Practitioners in Chengdu City / 中国医学科学院学报

Objective To investigate the current status of nutritional knowledge and skills of fast-food takeout practitioners in Chengdu City,so as to provide evidence for nutritional literacy education among takeout practitioners.Methods A questionnaire survey was conducted among 832 employees of fast-food takeout restaurants in Chengdu from April to September in 2019 through a multi-stage random sampling strategy.Results The awareness rate of nutritional knowledge of fast-food takeout practitioners in Chengdu was 77.28%,and the correct rates of answers to daily oil intake for adults,daily drinking water for adults and daily salt intake for adults in the Dietary Guidelines for Chinese Residents were respectively 17.43%,22.60% and 25.36%.In addition,the proportion of practitioners with the ability to estimate the recommended intake of food for a meal,the ability to estimate condiments intake and the ability to interpret nutrition labels were 8.77%,8.77% and 15.02%,respectively.The awareness rate of nutritional knowledge was the lowest(71.47%)in the practitioners aged≤25 and the highest(84.53%)in those aged 26-39,and the difference was statistically significant(χ