ObjectiveTo investigate the effect of Dingzhi Xiaowan （DZXW） in post-stroke cognitive impairment （PSCI） model mice. MethodsThe cerebral ischemia-reperfusion injury model of mice was established by using the middle cerebral artery occlusion method. Forty C57BL/6 male mice were randomly divided into the sham operation group， model group， low-dose DZXW group （1.43 g·kg^-1）， and high-dose DZXW group （2.56 g·kg^-1）， with 10 mice in each group. Both the sham operation group and the model group were treated with equal amounts of normal saline by gavage， and the above four groups of mice were gavaged once a day for 30 consecutive days. Morris water maze test was used to evaluate the learning memory ability of mice. Serum levels of amyloid precursor protein （APP）， amyloid 42 （Aβ₄₂）， acetylcholinesterase （AChE）， and superoxide dismutase （SOD） were measured by enzyme-linked immunosorbent assay （ELISA）. Deoxyribonucleotide end transferase-mediated nick end labelling （TUNEL） assay was applied to detect the degree of apoptosis in the mouse's hippocampal neurons. Western blot was used to detect the protein expression of phosphoinositol-3 kinase （PI3K）， protein kinase B （Akt）， mammalian target of rapamycin （mTOR）， hypoxia-inducible factor 1-alpha （HIF-1α）， B-cell lymphoma 2 （Bcl-2） homologous structural domain protein （Beclin1）， sequestosome 1 （p62）， microtubule-associated protein light chain 3 （LC3）， Bcl-2， and Bcl-2-associated X protein （Bax） in hippocampal tissue. Prussian blue staining was used to detect iron deposition in hippocampal tissue. Transmission electron microscopy was taken to observe the ultrastructure of the mouse's hippocampal neurons. ResultsCompared with the sham operation group， the latency， APP， Aβ₄₂， AChE， TUNEL positivity， ferric ion deposition， HIF-1α， Beclin1， Bax， and LC3Ⅱ/Ⅰ were significantly increased in the model group （P<0.01）， while the number of crossing platforms， SOD， p-PI3K， p-Akt， p-mTOR， p62， and Bcl-2 were significantly decreased （P<0.01）. Compared with the model group， the latency， APP， Aβ₄₂， AChE， TUNEL positivity rate， ferric ion deposition， HIF-1α， Beclin1， Bax， and LC3Ⅱ/Ⅰ were significantly reduced in the DZXW groups （P<0.05）， while the number of crossing platforms， SOD， p-PI3K， p-Akt， p-mTOR， p62， and Bcl-2 were significantly higher （P<0.05）. ConclusionDZXW can alleviate cognitive impairment induced by oxidative stress-aggravated hippocampal neuronal damage in PSCI model mice by modulating the PI3K/Akt/mTOR/HIF-1α autophagy signalling pathway.

OBJECTIVE To investigate the in vitro anti-inflammatory effects and mechanisms of oblongifolins A （OA） extracted from Garcinia oblongifolia. METHODS RAW264.7 cells were used as the research subject and divided into control group （0.5% DMSO）， lipopolysaccharide （LPS） group （1 μg/mL）， DEX group （10 µmol/L DEX+1 μg/mL LPS）， and low-， medium-， and high-concentration groups of OA （7.5， 15， 30 µmol/L OA+1 μg/mL LPS）. Except for the control group， the remaining groups were first stimulated with LPS for 1 hour and then mixed with drugs for 24 hours. The morphological changes of cells were observed in each group. The contents of nitric oxide （NO）， reactive oxygen species （ROS）， tumor necrosis factor-α （TNF-α）， interleukin-6 （IL-6）， IL-1β， IL-4 and IL-10 were detected in cells of each group； mRNA expression levels of TNF-α， IL-6 and IL-1β were measured. The expression of key proteins in the nuclear factor κB （NF-κB） and nuclear factor-erythroid 2-related factor 2 （Nrf2） signaling pathways in each group， as well as the nuclear translocation of NF-κB p65 and Nrf2 proteins in control group， LPS group and OA high-concentration group， were detected. RESULTS Compared to the LPS group， the number of spindle-shaped and irregular cells gradually decreased in OA groups， the contents of NO， ROS （except for OA low-concentration group）， TNF-α， IL-6 and IL-1β， the mRNA expressions of TNF-α， IL-6 （except for OA low-concentration group） and IL-1β as well as the protein expressions of phosphorylated NF-κB p65 （p-NF-κB p65）， p-IκBα， and Kelch-like ECH-associated protein 1 （Keap1） were decreased significantly （P＜0.05）. The contents of IL-4 and IL-10， protein expressions of IκBα， Nrf2 （except for OA low- and medium-concentration groups）， HO-1 （except for OA low-concentration group） and NQO1 were all increased significantly （P＜0.05）. OA of high concentration could inhibit NF-κB p65 protein nuclear translocation and promote Nrf2 protein nuclear translocation. CONCLUSIONS OA can suppress LPS-induced inflammation in RAW264.7 macrophages. The underlying molecular mechanism likely entails the inhibition of the NF-κB signaling pathway， the activation of the Nrf2 signaling pathway and the reduction of ROS and inflammatory factor release.

Objective:To explore the impact of nutrition education on the vitamin D nutritional status of pregnant women.Methods:It was a randomized controlled trial. A total of 96 women with vitamin D deficiency at 8-13 weeks of gestation who were regularly followed-up in the pregnancy nutrition clinic of the Department of Clinical Nutrition of Peking Union Medical College Hospital from January to October 2021 were selected by convenience sampling. The women were divided into a control group and an experimental group (48 cases in each group) according to the random number table method. The control group received routine outpatient treatment and was given different doses of vitamin D supplements according to the degree of vitamin D deficiency. On this basis, the experimental group were given additional nutritional education, including the distribution of vitamin D education manuals at 8-13 weeks of pregnancy, the assessment of vitamin D intake and cognition of vitamin D, the provision of individualized vitamin D nutritional status improvement plans, and the one-time assessment and guidance of vitamin D nutritional status at 24-28 weeks and 36-38 weeks of pregnancy, to continuously promote vitamin D health. Due to factors such as miscarriage or incomplete data acquisition during the study, 44 cases were finally included in the control group and 42 cases in the experimental group. The non-parametric test Mann-Whitney U was used to compare the vitamin D nutritional status of the two groups at 24-28 weeks and 36-38 weeks of pregnancy, and to analyze the effect of nutritional education on the vitamin D nutritional status of pregnant women. Results:At 8-13 weeks of pregnancy, there was no significant difference in serum 25-hydroxyvitamin D [25(OH)D] concentration between the two groups ( P>0.05). At 24-28 weeks of pregnancy, the serum 25(OH)D concentration and the proportion of pregnant women with normal vitamin D nutritional status in the experimental group were both significantly higher than those in the control group [29.90 (24.63, 34.28) vs 25.65 (21.50, 31.28) μg/L, 50.0% vs 29.5%] (both P<0.05). At 36-38 weeks of pregnancy, there was no significant difference in serum 25(OH)D level between the two groups ( P>0.05); however, the proportion of pregnant women with normal vitamin D nutritional status in the control group and the experimental group was 80.5% and 70.7%, respectively, which were both significantly higher than those in 8-13 and 24-28 weeks of pregnancy. The main effect of time was significant in both groups ( F=201.040, P<0.001). Conclusion:Nutrition education can enhance pregnant women′s knowledge of vitamin D, promote behavioral changes, and improve vitamin D nutritional status.

Background and objective Both of lung cancer incidence and mortality rank first among all cancers in China.Previous lung cancer screening trials were mostly selective screening for high-risk groups such as smokers.Non-smoking women accounted for a considerable proportion of lung cancer cases in Asia.This study aimed to evaluate the outcome of community-based mass screening in Guangzhou and identify the high-risk factors for lung cancer.Methods Residents aged 40-74 years in Guangzhou were screened with low-dose computed tomography(LDCT)for lung cancer and the pulmonary nodules were classified and managed according to China National Lung Cancer Screening Guideline with Low-dose Computed Tomography(2018 version).The detection rate of positive nodules was calculated.Before the LDCT examination,residents were required to complete a"lung cancer risk factors questionnaire".The risk factors of the questionnaire were analyzed by least absolute shrinkage and selection operator(LASSO)penalized Logistic regression analysis.Results A total of 6256 residents were included in this study.1228 positive nodules(19.63％)and 117 lung cancers were confirmed,including 6 cases of Tis,103 cases of stage Ⅰ(accounting for 88.03％of lung cancer).The results of LASSO penalized Logistic regression analysis indicated that age ≥50 yr(OR=1.07,95％CI:1.06-1.07),history of cancer(OR=3.29,95％CI:3.22-3.37),textile industry(OR=1.10,95％CI:1.08-1.13),use coal for cooking in childhood(OR=1.14,95％CI:1.13-1.16)and food al-lergy(OR=1.10,95％CI:1.07-1.13)were risk factors of lung cancer for female in this district.Conclusion This study highlighted that numerous early stages of lung cancer cases were detected by LDCT,which could be applied to screen-ing of lung cancer in women.Besides,age ≥50 yr,personal history of cancer,textile industry and use coal for cooking in childhood are risk factors for women in this district,which suggested that it's high time to raise the awareness of early lung cancer screening in this group.

【Objective】 To analyze the basic characteristics of whole blood donors from blood stations before and after the outbreak of COVID-19. 【Methods】 After excluding invalid data, data related to the basic characteristics of whole blood donors collected from 26 blood stations in China during 2018 to 2021 were statistically analyzed, including the trend of total whole blood donors, the number of repeated blood donors, the frequency of blood donation, the average age of donors and the recruitment of first-time blood donors. 【Results】 Affected by the epidemic, 8 out of 14 indicators were with large variations, accounting for 57%. The overall growth rate of total whole blood donors during the epidemic was higher than before the epidemic (P<0.05).The number of repeated blood donors has shown an increased trend, with a higher number during the epidemic than before (P<0.05). The frequency of blood donation was lower during the epidemic than before(P<0.05).Average ages of blood donors and female blood donors fluctuated widely during the epidemic, both higher than those before the epidemic(P<0.05).The donation rate of first-time blood donors <25 years old and ≥25 years old varied widely and irregularly during the epidemic (both P<0.05). The percentage of first-time blood donors fluctuated irregularly during the epidemic, with overall percentage lower than that before the epidemic(P<0.05). 【Conclusion】 Whole blood donors from 26 blood stations increased after the outbreak of COVID-19, and some indicators in certain areas showed significant fluctuations during the epidemic.

【Objective】 To investigate whether there is a correlation between the differences in ABO blood group distribution in patients with pancreatic cancer, and to evaluate the relative risk. 【Methods】 Patients with pathological diagnosis or discharge diagnosis of pancreatic cancer who underwent ABO blood group typing in our hospital from January 2017 to October 2021 were selected, and the blood group distribution of patients and the correlation were analyzed. 【Results】 There was a statistically significant difference between the pancreatic cancer group and the control group (P<0.05). The study showed that type A may be a relative risk factor for pancreatic cancer patients (χ²=42.44, P<0.001), and type B may play a protective role (χ²=16.28, P<0.01). Significant differences were found in distribution between different gender groups (χ²=64.35, P<0.05). The test results showed that type A may be a risk factor for pancreatic cancer in men (χ²=35.2, OR=1.7, 95%CI=0.59-1.02, P<0.001), and type O may play a protective role in pancreatic cancer(χ²=18.22, OR=0.6, 95%CI=0.25-0.32, P<0.01); type A may be a relative risk factor for female pancreatic cancer patients (χ²=7.06, OR=1.4, 95%CI=0.59-1.02, P<0.001), while type B may play a protective role (χ²=20.32, OR=0.5, 95%CI=0.32-0.43, P<0.01). In pancreatic cancer group, the risk factors of blood type A were higher than those of non-A group, and the protective effect of type B was significantly higher than that of non-B group. 【Conclusion】 The distribution of blood group and relative risk factors in pancreatic cancer patients suggest that A type is predominant; in the population with A blood group, more attention should be paid to early prevention and early treatment, so as to reduce the risk of disease.

Three-dimensional (3D) cell culture model is a system that co-culture carriers with 3D structural materials and different types of cells in vitro to simulate the microenvironment in vivo. This novel cell culture model has been proved to be close to the natural system in vivo. In the process of cell attachment, migration, mitosis and apoptosis, it could produce biological reactions different from that of monolayer cell culture. Therefore, it can be used as an ideal model to evaluate the dynamic pharmacological effects of active substances and the metastasis process of cancer cells. This paper compared and analyzed the different characteristics of cell growth and development under two-dimensional (2D) and 3D model culture and introduced the establishment method of 3D cell model. The application progress of 3D cell culture technology in tumor model and intestinal absorption model was summarized. Finally, the application prospect of 3D cell model in the evaluation and screening of active substance was revealed. This review is expected to provide reference for the development and application of new 3D cell culture models.
Cell Culture Techniques, Three Dimensional ; Cell Culture Techniques ; Apoptosis ; Cell Proliferation ; Technology

Objective:To investigate the correlation between the uterine incisional hematoma following cesarean section and scar diverticulum.Methods:This is a retrospective study involving 1 939 women who underwent cesarean section for the first time at the People's Hospital of Longhua Shenzhen from January 2020 to December 2021. Women with uterine incisional hematoma were selected as the hematoma group ( n=149) and were further divided into the dehiscence group, including patients with uterine incisional dehiscence caused by hematoma, and non-dehiscence group, including those without uterine incisional dehiscence. The patients without uterine incisional hematoma during the same period were selected as the control group ( n=110). The incidence of scar diverticulum after uterine incision healing and the long-term outcomes in the two groups were compared. Statistical analysis was performed using a t-test or Chi-square test. Results:(1) The incidence of uterine incisional hematoma was 7.7% (149/1 939). In the 149 cases with uterine incisional hematoma detected by postoperative ultrasonography, 74 were in the dehiscence group and 75 in the non-dehiscence group. (2) The number of women developing cesarean section scar diverticulum was 41, with an incidence of 2.1% (41/1 939), and all of them were in the hematoma group, accounting for 27.5% (41/149). The proportion of women who developed scar diverticulum in the dehiscence group was higher than that of the non-dehiscence group [52.7% (39/74) vs. 2.7% (2/75), χ2=35.96, P<0.001]. (3) The incidence of scar diverticulum in patients with uterine incisional dehiscence caused by intra-incision hematoma, intra- and posterior incision hematoma, as well as a combination of intra-, anterior, and posterior incision hematoma were 10/18, 55.1% (27/49), and 2/2, respectively. None of the five patients with uterine scar diverticulum were caused by anterior incision hematoma plus partial intra-incision hematoma. The incidence of scar diverticulum was 2.7% (2/75) in the non-dehiscence group. (4) Among the 41 cases with scar diverticulum, ultrasound re-examination by postpartum 6-24 months found that the results of 40 (97.6%) cases were consistent with the last ultrasound findings. A small "v"-shaped scar diverticulum was observed in another patient by ultrasound 42 d after delivery, which disappeared in a re-examination 13 months after surgery. Conclusions:Uterine incisional hematoma is associated with scar diverticulum following cesarean section. Uterine incisional dehiscence due to hematoma may be an influencing factor for diverticulum formation.

Gait is a behavioral characteristic of human walking. The formation mechanism of gait is complex and involves multiple organ systems throughout the body, so there are many factors that affect it. Many factors, such as genetics, diseases and accidental injuries, can change a certain link in the walking cycle, leading to changes in gait and abnormal gait. Accurate assessment of abnormal gait can help diagnose the disease, determine the severity of the disease, predict symptom improvement and future functional status, plan appropriate treatment targets, and monitor the effectiveness of interventions. This paper reviews the gait assessment methods commonly used in neurology, including qualitative gait assessment, scale assessment and instrumentalized gait assessment, in order to improve medical staff′s understanding and application ability of common gait assessment methods.

Objective:To explore whether the introduction of the O-PIRTAS (objective, preparation, instructive vedio, review, test, activity, summary) teaching model can help in curriculum learning and improve students' medical humanities literacy.Methods:Taking 118 sophomores of clinical medicine and nursing majors from Xiamen Medical College as control group, and 122 students as experimental group and as control group, the research lasting 8 weeks was carried out around five modules. The control group adopted the traditional teaching mode, while the experimental group used the O-PIRTAS model. After teaching, by comparing the exam results and issuing questionnaires, the teaching effects of the two methods on students' caring ability, empathy, emotional intelligence and supportive communication ability were compared. SPSS 22.0 was used for t test and chi-square test. Results:The average score of the experimental group [(83.61±2.13) points] was higher than that of the control group [(78.03±2.02) points], with significant differences ( t=3.60, P<0.001). As for the statistical analysis of the questionnaire, the students in experimental group scored higher in empathy, emotional intelligence and supportive communication skills than those in control group ( t=-3.20, P=0.002; t=-3.93, P<0.001; t=-4.00, P<0.001). Conclusion:Applying O-PIRTAS flipped classroom teaching model to medical humanities English courses helps to improve students' curriculum learning and medical humanities literacy, improve the effectiveness of the classroom and better play the educational role of the curriculum.