Culture of glioblastoma U87 stem-like cells and identification of its metabolic phenotype and tumorigenic ability / 基础医学与临床

Objective To cultivate glioblastoma U87 stem-like cells(SLCs)and to detect the level of stemness bio-markers,mitochondrial respiratory capacity and the capacity of in vivo tumorigenesis.Methods B-27,growth factors EGF and bFGF was added into DMEM/F-12 culture in serum-free stem cell culture medium for U87 SLCs.Suspended culture of U87 SLCs was suspended using the neuro-sphere formation assay,while adherent culture of U87 SLCs was achieved by coating Matrigel matrix on the culture surface.The mRNA and protein level of stemness biomarkers in culture were detected using real-time quantitative PCR and Western blot.The proportion of CD133+cells in culture was detected by flow cytometry.The changes of cell oxygen consumption rate were detected by Seahorse cell metabo-lism analysis.Cell tumorigenesis ability was verified by subcutaneous tumor transplantation in animals.Results U87 SLCs in stem cell culture medium would grow into typical sphere morphology within one week,and the spheres would continue to grow as the culture process prolongs.At the appropriate concentration of adhesive,U87 SLCs adhered to and grow well in stem cell culture medium.The mRNA transcription of stemness biomarkers such as CD133,nes-tin,OLIG2,CD44,CD15,and integrin α6(ITGA6)was significantly increased as found in both culture methods,and the protein levels of CD133 and nestin were also increased under both methods(P＜0.05).U87 SLCs showed higher mitochondrial reserve respiratory capacity(P＜0.05).U87 SLCs could form larger subcutaneous tumors with fewer inoculated cells(P＜0.05),and grew faster in vivo with stronger tumorigenic ability.Conclusions U87 SLCs have typical stemness characteristics and may function as tumor cell model with higher stemness properties.

Effect of carboxyamidotriazole-orotate on proliferation and fatty acid anabolism of human pancreatic cancer cell lines / 基础医学与临床

Objective To study the effect of carboxyamidotriazole-orotate(CTO)on the proliferation and fatty acid anabolism regulation of human pancreatic cancer cells.Methods Human pancreatic cancer cell lines AsPC-1,AsPC-1/GEM(AR),PANC-1 and MiaPaCa-2 were used as the study subjects;cell survival rate was detected by sulfo-nylrhodamine B(SRB);the mRNA level of key genes for fatty acid synthesis was detected by qPCR;the protein level of the AMPK/ACC pathway was detected by Western blot;intracellular lipid metabolites were examined by liquid chromatography-mass spectrometry(LC-MS).Results Comparing to control group,CTO significantly de-creased the cell viability of AsPC-1,AR,PANC-1,and MiaPaCa-2(P＜0.05).CTO down-regulated the mRNA level of key fatty acid synthesis genes(P＜0.05).CTO significantly reduced the protein expression of AMPK,ACC and c-Myc(P＜0.05),while increasing the protein expression of p-AMPK and p-ACC(P＜0.05).CTO decreased lipid metabolite content in AR cells(P＜0.05).Conclusions CTO attenuates cellular fatty acid anabolism by inhibition of oncogene c-Myc expression and AMPK/ACC pathway,down-regulates the expression of fatty acid synthesis-related genes,and then inhibits proliferation of the human pancreatic cancer cell lines AsPC-1,AR,PANC-1 and MiaPaCa-2.

Regulatory role of transforming growth factor beta subfamily in osteoarthritis / 中国组织工程研究

BACKGROUND:Osteoarthritis is one of the most common senile chronic degenerative diseases in China.Due to its complex pathogenesis and cellular molecular communication pathways,there is currently no effective method to slow down the progression of osteoarthritis.Studies have found that transforming growth factor-β is one of the key factors in the maintenance and regulation of joint stability and plays a significant role in the formation of early joints,as well as the development of bone and cartilage,and the remodeling of joints at various stages. OBJECTIVE:To review the regulatory role of the transforming growth factor-β subfamily in the occurrence and development of osteoarthritis,both domestically and internationally in recent years,to analyze the impacts it has at different stages of osteoarthritis,and to explore the potential application prospects of transforming growth factor-β in the clinical treatment of osteoarthritis,with a view to informing clinical treatment protocols.. METHODS:The relevant articles were searched by computer from CNKI Database and PubMed Database.The search terms were"osteoarthritis,transforming growth factor,signaling pathway,bone remodeling,cartilage degeneration,angiogenesis,treatment"in Chinese and English,respectively.Finally,57 articles were included for review. RESULTS AND CONCLUSION:The pathogenesis of osteoarthritis remains a subject of ongoing exploration with no unified consensus.Numerous studies highlight the close correlation between osteoarthritis and cytokines,focusing on the transforming growth factor-β superfamily as a pivotal mechanism and therapeutic breakthrough.Transforming growth factor-β plays a crucial role in early joint cartilage formation and maintenance,promoting cartilage repair.However,post-joint formation,its protective effect weakens,leading to potential destructive consequences.This dual regulatory role is a current clinical treatment focus,necessitating further research to delineate its application scope for standardized protocols.Highly active transforming growth factor-β participates in the regulation of bone cells,osteoblasts,and osteoclasts under mechanical stress,and intervenes in the subsequent remodeling of bone microstructure.Specific inhibitors present potential targeted therapeutics,yet their safety and efficacy in clinical settings require refinement.Vascular proliferation may serve as a potential disruptive pathway in transforming growth factor-β-mediated cartilage degeneration and subchondral bone remodeling.Abnormal communication pathways can further disrupt the homeostasis of the microenvironment of osteochondral units,thereby accelerating key pathological progressions of osteoarthritis.Research on transforming growth factor-β in osteoarthritic contexts is comprehensive,holding broad clinical application prospects.Drugs related to transforming growth factor-β are in clinical trial phases,but addressing potential impacts on other tissues and precise control of targeted delivery are critical concerns.As research advances,there is optimism for innovative breakthroughs in slowing the progression of osteoarthritis in the future.

Analysis of current status and risk factors of multidrug-resistant bacteria wound infections in patients with autoimmune bullous diseases / 中华皮肤科杂志

Objective:To investigate the current status of multidrug-resistant bacteria (MDRO) wound infections in patients with autoimmune bullous diseases (AIBDs), and to analyze their risk factors.Methods:A retrospective study was conducted, and inpatients with AIBDs accompanied by wound infections were collected from Hospital of Dermatology, Chinese Academy of Medical Sciences from January 2020 to December 2022. A descriptive analysis was carried out to analyze the basic characteristics of these patients and pathogenic characteristics of MDRO. Univariate and binary logistic regression models were used to analyze independent risk factors for MDRO infections in patients with AIBDs. Differences between the MDRO infection group and common bacterial infection group were analyzed by using t test, Mann-Whitney U test and chi-square test. Results:Totally, 271 patients with AIBDs accompanied by wound infections were included, including 159 males (58.7%) and 112 females (41.3%), and 142 patients (52.4%) were aged over 60 years. Most patients with AIBDs were diagnosed with pemphigus vulgaris (131 cases, 48.3%), or bullous pemphigoid (99 cases, 36.5%). Bacterial culture was positive in all the patients, and 74 (27.3%) were infected with MDRO; a total of 108 strains of MDRO were detected, with relatively high detection rates of Staphylococcus (82 strains, 75.9%) and Enterobacter (15 strains, 13.9%). Significant differences were observed between the MDRO infection group and the common bacterial infection group in the duration of hospitalization, involved body surface area, proportions of patients self-modificating drug dosage, proportions of patients topically using antibiotic ointments, proportions of patients using immunosuppressants, duration of glucocorticoid use, maximum dose of glucocorticoids and the first albumin level at admission (all P < 0.05), while there were no significant differences in the gender, age, proportions of patients at first hospitalization, types of AIBDs, duration of education, body mass index, disease duration, proportions of smoking patients, proportions of drinking patients, proportions of patients with comorbid chronic diseases, surgical history, prevalence of hypoalbuminemia, prevalence of mucosal involvement, proportions of patients receiving topical glucocorticoids, proportions of patients using biological agents, duration of antibiotic use, and the first total protein level at admission between the two groups (all P > 0.05). Logistic regression analysis showed that the use of topical antibiotic ointments, use of immunosuppressants, maximum dose of glucocorticoids, and self-modification of drug dosage were independent risk factors for MDRO infections (all P < 0.05) . Conclusions:The patients with AIBDs were prone to develop MDRO infections in wounds, and Staphylococcus infections were the most common. The use of topical antibiotic ointments, use of immunosuppressants, high dose of glucocorticoids, and self-modification of drug dosage may increase the risk of infections in patients with AIBDs.

Establishment of a rat model of myocardial hypertrophy by a modified abdominal aortic coarctation method / 解剖学报

Objective To compare effectiveness between the modified and traditional pressure-overload myocardial hypertrophy(POMH) model by abdominal aorta coarctation (AAC) method. Methods Totally 45 rats were divided into three groups(n = 15 per group), sham group, traditional group, and modified group. In the traditional group, the diameter ol the abdominal aorta was narrowed to 0. 70 mm through a midline incision for 4 weeks; in the modified group, the diameter of the abdominal aorta was narrowed above the left kidney to 0. 45 mm for 1 week, and then the narrowing was lifted postoperatively. The cardiac index, heart weight (HW) /body weight (BW) and left ventricular index, left ventricular weight (LVW)/BW were measured from the heart specimens, and the cross-sectional area of cardiac myocytes, myocardial collagen area, and myocardial collagen area Iraction were measured in the pathological sections by HE staining and Masson staining. Results Compared with the sham group, the differences in end-systolic interventricular septum thickness (IVSs), left ventricular end-systolic posterior wall thickness (LVPWs), HW/BW, LVW/BW, cardiomyocyte cross-sectional area, myocardial collagen area, myocardial collagen area fraction, and brain natriuretic peptide (BNP) expression levels were statistically significant (P0. 05). Conclusion The modified abdominal aortic constriction method used in this experiment is time-saving, stable, homogeneous and easy to replicate, and is a more ideal approach to establish a rat model of POMH.

Analysis of the incidence and mortality of thyroid cancer in Shandong Province from 2012 to 2022 based on the age-period-cohort model / 中华预防医学杂志

Objective: To analyze the trend of incidence and mortality of thyroid cancer and estimate its age-period-cohort effect in Shandong Province from 2012 to 2022. Methods: The Joinpoint regression was used to analyze the trend of incidence and mortality of thyroid cancer and calculate the average annual percentage change (AAPC) based on the data on thyroid cancer from 2012 to 2022. The age-period-cohort model was used to analyze the age-effect, time-effect and cohort-effect of thyroid cancer risk in the population aged over 20 years. Results: From 2012 to 2022, the incidence of thyroid cancer in Shandong province showed a significant upward trend, with an AAPC of 21.68% (95%CI: 19.14%-24.27%, P<0.001). The incidence of females was higher than that of males, and the incidence of urban areas was higher than that of rural areas. The trend of thyroid cancer mortality was relatively stable with an AAPC of -3.04% (95%CI:-8.81%-3.09%, P=0.323). The age effect of incidence increased with age before 60 years old and decreased with age after 60 years old. The incidence peaked in the age group of 55-59. The period effect increased with time. The cohort effect showed that the cohort born before 1957 had a downward trend over time, while the cohort born after 1957 had an upward trend. Conclusion: The incidence of thyroid cancer in Shandong shows a rising trend from 2012 to 2022. Age is an important factor affecting the risk of thyroid cancer. The mortality of thyroid cancer remains stable.

Analysis of the incidence and mortality of thyroid cancer in Shandong Province from 2012 to 2022 based on the age-period-cohort model / 中华预防医学杂志

Objective: To analyze the trend of incidence and mortality of thyroid cancer and estimate its age-period-cohort effect in Shandong Province from 2012 to 2022. Methods: The Joinpoint regression was used to analyze the trend of incidence and mortality of thyroid cancer and calculate the average annual percentage change (AAPC) based on the data on thyroid cancer from 2012 to 2022. The age-period-cohort model was used to analyze the age-effect, time-effect and cohort-effect of thyroid cancer risk in the population aged over 20 years. Results: From 2012 to 2022, the incidence of thyroid cancer in Shandong province showed a significant upward trend, with an AAPC of 21.68% (95%CI: 19.14%-24.27%, P<0.001). The incidence of females was higher than that of males, and the incidence of urban areas was higher than that of rural areas. The trend of thyroid cancer mortality was relatively stable with an AAPC of -3.04% (95%CI:-8.81%-3.09%, P=0.323). The age effect of incidence increased with age before 60 years old and decreased with age after 60 years old. The incidence peaked in the age group of 55-59. The period effect increased with time. The cohort effect showed that the cohort born before 1957 had a downward trend over time, while the cohort born after 1957 had an upward trend. Conclusion: The incidence of thyroid cancer in Shandong shows a rising trend from 2012 to 2022. Age is an important factor affecting the risk of thyroid cancer. The mortality of thyroid cancer remains stable.

Surveillance on pinworm infection among rural children in Anhui Province from 2017 to 2021 / 中国学校卫生

Objective@#To understand the status of pinworm infection in rural children aged 3-9 years in Anhui Province, and to provide scientific basis for the prevention and control strategy of pinworm disease.@*Methods@#According to the National Surveillance Program of Liver Fluke Disease and Soil Transmitted Nematodiasis(Trial), no less than 10% counties(cities and districts) in Anhui Province were selected as mobile surveillance sites every year. Each surveillance site was divided into 5 areas on the basis of geographical location(east, west, south, north and middle), from each of the areas, one administrative village was selected from one township(town, community) for conducting surveillance. Children at age 3-9 years from each site were examined for pinworm infection with the modified Kato-Katz thick smear method and the adhesive cellophane tape perianal swab method. Chi square test was used to compare the infection rate.@*Results@#From 2017 to 2021, the 5 year average infection rate of pinworm in rural Anhui was 1.34%(128/9 557), and there was no significant difference in the infection rate over the years( P >0.05). The detection rates of the modified Kato-Katz thick smear method and the adhesive cellophane tape perianal swab method were 0.28% and 1.23%, respectively, the difference was statistically significant( χ 2=72.97, P <0.01). In different regions, the 5 year average infection rate of Fuyang City was the highest(4.27%), and the rate of each city was positively correlated with the number of local resident population( r =0.54, P <0.05). There was no significant sex difference in the 5 year average infection rates( P >0.05). The 5 year average infection rate of children aged 3 to 9 years in rural areas were 0.62%, 1.10%, 1.44%, 1.57%, 0.94%, 2.09% and 1.57%, respectively, showed an increasing trend with the increase of age( χ 2=14.41, χ 2 trend =6.70, P <0.05). There was no significant difference in the average infection rate between scattered children and collectively living children( P >0.05).@*Conclusion@#From 2017 to 2021, the infection rate of pinworm among children in rural Anhui province remains at a low level. In the future, health education and monitoring should be strengthened.

Effect of transcutaneous auricular vagus nerve stimulation on functional connectivity in the related brain regions of patients with depression based on the resting-state fMRI / 中国针灸

OBJECTIVE@#To explore the brain effect mechanism and the correlation between brain functional imaging and cognitive function in treatment of depressive disorder (DD) with transcutaneous auricular vagus nerve stimulation (taVNS) based on the resting-state functional magenetic reasonance imaging (rs-fMRI).@*METHODS@#Thirty-two DD patients were included in a depression group and 32 subjects of healthy condition were enrolled in a normal group. In the depression group, the taVNS was applied to bilateral Xin (CO15) and Shen (CO10), at disperse-dense wave, 4 Hz/20 Hz in frequency and current intensity ≤20 mA depending on patient's tolerance, 30 min each time, twice daily. The duration of treatment consisted of 8 weeks. The patients of two groups were undertaken rs-fMRI scanning. The scores of Hamilton depression scale (HAMD), Hamilton anxiety scale (HAMA) and Wisconsin card sorting test (WCST) were observed in the normal group at baseline and the depression group before and after treatment separately. The differential brain regions were observed before and after treatment in the two groups and the value of degree centrality (DC) of fMRI was obtained. Their correlation was analyzed in terms of HAMD, HAMA and WCST scores.@*RESULTS@#The scores of HAMD and HAMA in the depression group were all higher than those in the normal group (P<0.05). After treatment, the scores of HAMD and HAMA were lower than those before treatment in the depression group; the scores of total responses, response errors and perseverative errors of WCST were all lower than those before treatment (P<0.05). The brain regions with significant differences included the left inferior temporal gyrus, the left cerebellar peduncles region 1, the left insula, the right putamen, the bilateral supplementary motor area and the right middle frontal gyrus. After treatment, the value of DC in left supplementary motor area was negatively correlated to HAMD and HAMA scores respectively (r=-0.324, P=0.012; r=-0.310, P=0.015); the value of DC in left cerebellar peduncles region 1 was negatively correlated to the total responses of WCST (r=-0.322, P=0.013), and the left insula was positively correlated to the total responses of WCST (r=0.271, P=0.036).@*CONCLUSION@#The taVNS can modulate the intensity of the functional activities of some brain regions so as to relieve depressive symptoms and improve cognitive function.

Effect of complete percutaneous revascularization on improving long-term outcomes of patients with chronic total occlusion and multi-vessel disease / 中华医学杂志(英文版)

BACKGROUND@#Limited data are available on the comparison of clinical outcomes of complete vs. incomplete percutaneous coronary intervention (PCI) for patients with chronic total occlusion (CTO) and multi-vessel disease (MVD). The study aimed to compare their clinical outcomes.@*METHODS@#A total of 558 patients with CTO and MVD were divided into the optimal medical treatment (OMT) group ( n = 86), incomplete PCI group ( n = 327), and complete PCI group ( n = 145). Propensity score matching (PSM) was performed between the complete and incomplete PCI groups as sensitivity analysis. The primary outcome was defined as the occurrence of major adverse cardiovascular events (MACEs), and unstable angina was defined as the secondary outcome.@*RESULTS@#At a median follow-up of 21 months, there were statistical differences among the OMT, incomplete PCI, and complete PCI groups in the rates of MACEs (43.0% [37/86] vs. 30.6% [100/327] vs. 20.0% [29/145], respectively, P = 0.016) and unstable angina (24.4% [21/86] vs. 19.3% [63/327] vs. 10.3% [15/145], respectively, P = 0.010). Complete PCI was associated with lower MACE compared with OMT (adjusted hazard ratio [HR] = 2.00; 95% confidence interval [CI] = 1.23-3.27; P = 0.005) or incomplete PCI (adjusted HR = 1.58; 95% CI = 1.04-2.39; P = 0.031). Sensitivity analysis of PSM showed similar results to the above on the rates of MACEs between complete PCI and incomplete PCI groups (20.5% [25/122] vs. 32.6% [62/190], respectively; adjusted HR = 0.55; 95% CI = 0.32-0.96; P = 0.035) and unstable angina (10.7% [13/122] vs. 20.5% [39/190], respectively; adjusted HR = 0.48; 95% CI = 0.24-0.99; P = 0.046).@*CONCLUSIONS@#For treatment of CTO and MVD, complete PCI reduced the long-term risk of MACEs and unstable angina, as compared with incomplete PCI and OMT. Complete PCI in both CTO and non-CTO lesions can potentially improve the prognosis of patients with CTO and MVD.

Influence of E-cadherin methylation on prognosis in children with acute lymphoblastic leukemia / 中国当代儿科杂志

OBJECTIVES@#To study the significance of E-cadherin and the association between E-cadherin methylation status and prognosis in children with acute lymphoblastic leukemia (ALL) by examining the mRNA and protein expression of E-cadherin and its gene methylation status in bone marrow mononuclear cells of children with ALL.@*METHODS@#The samples of 5 mL bone marrow blood were collected from 42 children with ALL who were diagnosed for the first time at diagnosis (pre-treatment group) and on day 33 of induction chemotherapy (post-treatment group). RT-qPCR, Western blot, and methylation-specific PCR were used to measure the mRNA and protein expression of E-cadherin and the methylation level of the E-cadherin gene. The changes in each index after induction chemotherapy were compared.@*RESULTS@#The mRNA and protein expression levels of E-cadherin in the post-treatment group were significantly higher than those in the pre-treatment group (P<0.05), while the positive rate of E-cadherin gene methylation in the post-treatment group was significantly lower than that in the pre-treatment group (P<0.05). At the end of the test, the children with negative methylation had significantly higher overall survival rate and event-free survival rate than those with positive methylation (P<0.05).@*CONCLUSIONS@#E-cadherin expression is associated with the development of ALL in children, and its decreased expression and increased methylation level may indicate a poor prognosis.

Exosomes derived from Nr-CWS pretreated MSCs facilitate diabetic wound healing by promoting angiogenesis via the circIARS1/miR-4782-5p/VEGFA axis / 中国天然药物

Mesenchymal stem cell (MSC)-derived exosomes (Exos) were reported to a prospective candidate in accelerating diabetic wound healing due to their pro-angiogenic effect. MSCs pretreated with chemistry or biology factors were reported to advance the biological activities of MSC-derived exosomes. Hence, this study was designed to explore whether exosomes derived from human umbilical cord MSCs (hucMSCs) preconditioned with Nocardia rubra cell wall skeleton (Nr-CWS) exhibited superior proangiogenic effect on diabetic wound repair and its underlying molecular mechanisms. The results showed that Nr-CWS-Exos facilitated the proliferation, migration and tube formation of endothelial cells in vitro. In vivo, Nr-CWS-Exos exerted great effect on advancing wound healing by facilitating the angiogenesis of wound tissues compared with Exos. Furthermore, the expression of circIARS1 increased after HUVECs were treated with Nr-CWS-Exos. CircIARS1 promoted the pro-angiogenic effects of Nr-CWS-Exos on endothelial cellsvia the miR-4782-5p/VEGFA axis. Taken together, those data reveal that exosomes derived from Nr-CWS-pretreated MSCs might serve as an underlying strategy for diabetic wound treatment through advancing the biological function of endothelial cells via the circIARS1/miR-4782-5p/VEGFA axis.

Infiltration and significance of M1 macrophage in breast cancer: an analysis of METABRIC database and clinical validation / 中华肿瘤杂志

Objective: To investigate the differences of immune microenvironment between stage T1N3 and stage T3N0 breast cancer patients and explore the relationship between M1 macrophage infiltration and lymph node metastasis in breast cancer. Methods: Clinical information and RNA-sequencing (RNA-Seq) expression data of stage T1N3 (n=9) and stage T3N0 (n=11) breast cancer patients were extracted from Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) databases. Using CIBERSORT, the proportions of 22 types of immune cells were calculated, and then the differences of immune cell infiltration between stage T1N3 and T3N0 patients were compared. From 2011 to 2022, pathologic specimens were collected from breast cancer patients who underwent curative resection at the Cancer Hospital, Chinese Academy of Medical Sciences, including 77 at stage T1N3 and 58 at stage T3N0.The METABRIC database analysis results were verified by examining the density of M1 macrophages in tissues using dual-staining immunohistochemistry. Results: METABRIC data analysis showed M1 macrophage was the highest proportion, 15.85% in stage T1N3 breast cancer; M2 macrophage was the highest proportion, 13.07% in stage T3N0 breast cancer.M1 macrophage proportions were statistically different between patients with stage T1N3 and stage T3N0 (P=0.010). The dual-staining immunohistochemistry analysis of breast cancer tissues showed M1 macrophage density (median) of 62.0 and 38.0 cells/mm(2) for stage T1N3 and T3N0, respectively. The difference was statistically significant (P=0.002). Conclusion: The density of M1 macrophages is notably higher in stage T1N3 patients and is associated with lymph node metastasis.

Nutritional Status of Children Aged 3 to 7 Years in Zhag′yab， Tibet / 中山大学学报(医学科学版)

ObjectiveTo understand the physical development level of 3-7 years old children in Zhag′yab， and to provide reference for local health decision-making. MethodsA cross-sectional study was conducted between June 2021 and July 2021， with a sample of 1 247 Tibetan children aged 3-7 years from kindergartens in 13 districts of Zhag′yab. Their height and weight were measured and the hemoglobin was detected by a unified method. Standard statistical method was adopted （Z-score method）. Z-scores of length /height-for-age （HAZ）， Z-scores of weight-for-age （WAZ）， Z-scores of body mass index （BMI）-for-age （BAZ） and Z-scores of weight-for-height （WHZ） were calculated by WHO Anthro v3.2.2 and WHO Anthro Plus. The nutritional status of children was evaluated according to WHO diagnostic criteria for malnutrition and anemia. ResultsThe average WAZ and HAZ of children aged 3 to 7 in Zhag′yab were lower than the WHO standards，except for the WAZ of 4-year old， the differences were statistically significant （P<0.05）. The overall detection rate of malnutrition was 25.7%， stunting， underweight， wasting， overweight， obesity and anemia were 11.6%， 11.8%， 10.8%， 3.3%， 1.8% and 29.3%， respectively. The detection rates of all indicators in boys were higher than those in girls， and the differences were not statistically significant （P>0.05）. The overweight rate and obesity rate of rural children were lower than those of urban children， and the other detection rates were higher than those of urban children. The differences of underweight rate， obesity rate and anemia rate were statistically significant between urban and rural children （P<0.05）. Among the detection rates of all indicators in different age groups， there were statistically significant differences in the overweight rate and the anemia rate （P<0.05）. The overweight rate of children aged 4 and the anemia rate of children aged 5 were the highest. ConclusionsThe physical development of children aged 3 to 7 in Zhag′yab is poor， and the prevalence of malnutrition and anemia is high. Underweight and anemia are more serious in rural children， and the overweight and obesity problem of urban children is emerging. More attention should be paid to promote their nutritional status. The prevention and intervention of children’s malnutrition should be strengthened in Zhag′yab.

Effect of different doses of compound sodium chloride injection combined with norepinephrine on prevention of hypotension after lumbar anesthesia in patients undergoing caesarean section / 中华麻醉学杂志

Objective:To evaluate the effect of different doses of compound sodium chloride injection combined with norepinephrine on prevention of hypotension after lumbar anesthesia in the patients undergoing caesarean section.Methods:A total of 150 patients with a singleton fetus, aged 18-45 yr, at ≥37 weeks of gestation, of American Society of Anesthesiologists Physical Status classification Ⅰ or Ⅱ, with height ≥150 cm, weighing ≤100 kg, with body mass index < 40 kg/m 2, scheduled for elective caesarean section under lumbar anesthesia, were divided into 3 groups ( n=50 each) by the random number table method: compound sodium chloride injection 4, 8 and 12 ml·kg -1·h -1 groups (group A, group B, group C). Compound sodium chloride injection 4 ml/kg was intravenously injected for liquid preload before lumbar anesthesia, and 0.5% hyperbaric bupivacaine 12.5 mg was injected to the subarachnoid space for lumbar anesthesia. Norepinephrine was intravenously injected at a dose of 6 μg immediately after intrathecal injection, followed by an infusion of 0.05 μg·kg -1·min -1, and infusion was stopped at 5 min after delivery. Compound sodium chloride injection was intravenously infused simultaneously at a rate of 4, 8 and 12 ml·kg -1·h -1 in A, B and C groups, respectively. The maximum diameter of inferior vena cava (IVCmax) and the minimum diameter of inferior vena cava (IVCmin) were measured by ultrasound, and inferior vena cava collapse index (IVC-CI) was calculated at 1 min before fluid preload (T 1), immediately after fluid preload (T 2), at 5 min after anesthesia (T 3), at 5 min after fetal delivery (T 4) and immediately before leaving the operating room (T 5). The incidence of intraoperative adverse events (hypotension, severe hypotension, bradycardia, hypertension, nausea, and vomiting) and neonatal outcomes (umbilical artery blood gas index and Apgar score at 1 and 5 min after birth) were recorded. Results:Compared with group A, IVCmin was significantly increased and IVC-CI was decreased at T 5 in group B, and IVCmin and IVCmax were significantly increased and IVC-CI was decreased at T 5 in group C ( P<0.05). There was no significant difference in IVCmax, IVCmin and IVC-CI at each time point between group B and group C ( P>0.05). There was no significant difference in the incidence of hypotension, severe hypotension, bradycardia, hypertension, nausea and vomiting among the three groups ( P>0.05). There was no significant difference in the results of blood gas analysis of the umbilical artery and Apgar score at each time point after birth among the three groups ( P>0.05). Conclusions:Compound sodium chloride injection 4, 8 and 12 ml·kg -1·h -1 combined with norepinephrine can effectively prevent the occurrence of hypotension after lumbar anesthesia in the patients undergoing caesarean section without increasing maternal and infant adverse events, and the effect of 8 and 12 ml·kg -1·h -1 for volume supplementation is better than that of 4 ml·kg -1·h -1.

Three-scene medication process simulation and its application in teaching of nursing pharmacology / 基础医学与临床

Objective To explore the effectiveness of a refined three-scene medication simulation teaching in nurs-ing pharmacology course for nursing undergraduates.Methods Undergraduates of four-year curriculum in School of Nursing,Peking Union Medical College enrolled in 2020 and 2021 were selected as objects in control group and ex-perimental group,respectively.Students in control group learned medication knowledge in a patient case simulation scene,while a refined three-scene medication process(before,during and after medication)simulation was applied in experimental group.The learning outcome was evaluated in forms of both test of key knowledge points and a questionnaire survey at the end of the semester.Results The scores of nursing pharmacology in experimental group were significantly higher than in control group(P＜0.001).The rates of right answer for knowledge associated with the refined class in experimental group were also significantly higher than in control group(P＜0.001).However,for knowledge that has not been adjusted for instructional design,there is no significant difference in answer accura-cy between two groups.The survey by questionnaire showed that the students believed the three-scene medication simulation as good learning method and may support to strengthen professional quality of clinical performance.Conclusions Compared with the unrefined simulation class,the three-scene(before,during and after medication)class further simulated the real work flow,connected the knowledge points more reasonably,and enhanced the knowledge mastery and professional responsibility awareness.

Advances in post-operative thyroid scar control / 中华内分泌外科杂志

Postoperative thyroid scar not only causes itching, pain, and pulling, but also seriously affects the patient’s aesthetics, so it is important to study the prevention and treatment of postoperative thyroid scar. In the past 20 years, clinicians have made many innovative researches to alleviate postoperative thyroid scar growth, and the following progresses have been made: firstly, thyroid surgery methods and surgical accesses have been improved to a certain extent, resulting in more concealed and less traumatic accesses; secondly, the use of lasers and silicone and other drugs has significantly improved the scar treatment effect; thirdly, the concept of "cosmetic" is gradually gaining popularity, and related technical means are used throughout the treatment of postoperative scarring of the thyroid gland, and multiple treatment modalities are used "early" and "in combination" to "prevent" scar growth after surgery. The use of multiple treatment modalities to prevent scar growth in the early postoperative period has achieved twice the result with half the effort.

Recognition models of cigarette smoking behavior by real-time indoor PM2.5 concentrations in public places / 环境与职业医学

Background Public places are frequently polluted by cigarette smoking, and there is a lack of accurate, real-time, and intelligent monitoring technology to identify smoking behavior. It is necessary to develop a tool to identify cigarette smoking behavior in public places for more efficient control of cigarette smoking and better indoor air quality. Objective To construct a model for recognizing cigarette smoking behavior based on real-time indoor concentrations of PM2.5 in public places. Methods Real-time indoor PM2.5 concentrations were measured for at least 7 continuous days in 10 arbitrarily selected places (6 public service providers and and 4 office or other places) from Oct. to Nov. 2022 in Pudong New Area, Shanghai. Indoor nicotine concentrations were monitored with passive samplers simultaneously. Outdoor PM2.5 concentration data were obtained from three municipal environmental monitoring stations which were nearest to each monitoring point during the same period. Mann-Whitney U test was used to compare indoor and outdoor means of PM2.5 concentrations, and Spearman rank correlation was used to analyze indoor PM2.5 and nicotine concentrations. An interactive plot and a random forest model was applied to examine the association between video observation validated indoor smoking behavior and real-time indoor PM2.5 concentrations in an Internet cafe. Results The average indoor PM2.5 concentration in the places providing public services [(97.5±149.3) µg·m−3] was significantly higher than that in office and other places [(19.8±12.2) µg·m−3] (P=0.011). The indoor/outdoor ratio (I/O ratio) of PM2.5 concentration in the public service providers ranged from 1.1 to 19.0. Furthermore, the indoor PM2.5 concentrations in the 10 public places were significantly correlated with the nicotine concentrations (rs=0.969, P<0.001). Among them, the top 3 highly polluted places were Internet cafes, chess and card rooms, and KTV. The results of random forest modeling showed that, for synchronous real-time PM2.5 concentration, the area under the curve (AUC) was 0.66, while for PM2.5 concentration at a lag of 4 min after the incidence of smoking behavior, the AUC increased to 0.72. Conclusion The indoor PM2.5 concentrations in public places are highly correlated with smoking behavior. Based on real-time indoor PM2.5 monitoring, a preliminary recognition model for smoking behavior is constructed with acceptable accuracy, indicating its potential values applied in smoking control and management in public places.

Expression of SEC61G in Oral Squamous Cell Carcinoma and Its Prognostic Value / 肿瘤防治研究

Objective To analyze the expression of SEC61G in oral squamous cell carcinoma (OSCC) tissues and cell lines and determine its correlations with the clinicopathological features and prognosis of patients with OSCC. Methods The expression of SEC61G in OSCC tissues and its diagnostic and prognostic value were detected in the TCGA database. The expression levels of SEC61G in paraffin-embedded OSCC tissues and adjacent normal tissue specimens of 64 patients with OSCC were detected by immunohistochemistry. The correlation of SEC61G expression in OSCC tissues with the clinicopathological features was analyzed. Kaplan-Meier survival curve analysis showed that the expression of SEC61G correlated with the overall survival time of patients with OSCC. Cox regression analysis was used to analyze prognostic influence factors. Results The expression of SEC61G in OSCC tissues was significantly higher than that in para-carcinoma tissues (P < 0.05), consistent with the results of the TCGA database analysis, and its expression was closely related to N stage and clinical stage (P < 0.05). The overall survival of patients with OSCC in the group with low SEC61G expression was significantly higher than that in the high SEC61G expression group (P < 0.05). N stage and SEC61G expression were the prognostic influence factors for patients with OSCC (P < 0.05). SEC61G expression was an independent predictor of the prognosis of patients with OSCC (P < 0.05, AUC=0.923). Conclusion SEC61G is highly expressed in OSCC tissues and associated with N stage and clinical stage. Its high expression is associated with poor prognosis of patients. It may be a diagnostic biomarker for OSCC.

The reversal effect of albiflorin on multidrug resistance of human ovarian cancer and its mechanism / 中国药理学通报

Aim To study the reversal effect of albiflorin(AL)on multidrug resistance of human ovarian cancer and the potential mechanism. Methods The drug resistance reversal effect of AL on SKOV3/DDP cells was detected by CCK-8 kit,and the effect of AL on P-glycoprotein(P-gp)function was detected by flow cytometry. The effects of AL on MYC,WWP1 and ABCB1 in SKOV3/DDP cells were detected by RT-qPCR and Western blot. The MYC-knockdown SKOV3/DDP cell line was constructed by RNA interference technology,and its drug resistance,P-gp function and related gene and protein expression changes were investigated. Results AL had a drug resistance reversal effect on SKOV3/DDP cells and a concentration-dependent inhibitory effect on P-gp function. The inhibitory effects of AL 25,50 and 100 μmol·L-1 on ABCB1/P-gp,MYC and WWP1 were gradually enhanced. The inhibitory effect of MYCi975,a MYC inhibitor,on ABCB1/P-gp,MYC and WWP1 was stronger than or equivalent to that of AL 100 μmol·L-1 group. After knockdown of MYC in SKOV3/DDP cells,cell drug resistance,P-gp function,and related gene and protein expression were inhibited. Conclusions The drug resistance reversal effect of AL on SKOV3/DDP cells may be related to the inhibition of P-gp function and the expression of ABCB1/P-gp,MYC and WWP1,which provides an experiment base for the development of AL as a drug resistance reversal agent for the clinical treatment of ovarian cancer.