ObjectiveTo explore the function of DANCR during the differentiation of human embryonic stem cells （hESC） toward definitive endoderm （DE）. MethodsThe in vitro DE differentiation system was established and its efficiency was verified. The correlation between the expression level of DANCR and DE differentiation process was detected. Using lentivirus system， we stably knocked down DANCR in hESC. The shDANCR hESC line was applied to DE differentiation， using qPCR and Western blot to detect the expression of DE marker genes SOX17 and FOXA2， and that of primitive streak marker genes Brachyury （T）， EOMES， MIXL1 and GSC. Dual luciferase reporter assay and qPCR were used to confirm the interaction between DANCR and the WNT pathway during DE differentiation. ResultsThe in vitro differentiation system mimicked DE differentiation efficiently. And the expression of DANCR was gradually downregulated during differentiation. DANCR was efficiently knocked down in the shDANCR hESC line （P < 0.001）. Compared with those in the control group， the expression levels of primitive markers Brachyury （T）， EOMES， MIXL1 and GSC， as well as DE markers SOX17 and FOXA2， were significantly decreased in shDANCR groups （P < 0.05）. Furthermore， the transcriptional activity of the WNT pathway in shDANCR groups was lower than that in the control group （P < 0.05）. And RNA levels of downstream genes of the WNT pathway， FZD5， FZD8， SFRP1， FRZB and ANKRD6， were significantly decreased in shDANCR groups （P < 0.05）. However， differences in protein levels of the TGFβ pathway effectors SMAD2/3 and p-SMAD2 were statistically insignificant in shDANCR and control groups （P > 0.05）. Forced activation of β-CATENIN rescued DANCR knock down-induced deficiency in DE differentiation. ConclusionsThe expression of DANCR decreases during DE differentiation. DANCR may promote DE differentiation through modulating the activity of the WNT pathway.

Objective To observe the effect of catgut implantation at acupoint(CIAA)on the learning and memory function,hippocampal microangiogenesis,and the mRNA and protein expression of angiopoietin-1(Ang-1)/vascular endothelialgrowth factor(VEGF)and its receptor TEK tyrosine kinase(TIE2)/VEGF receptor 2(VEGFR2)in rats with vascular dementia(VD).To explore the mechanism of catgut implantation at acupoint in preventing and treating VD.Methods Using a random number table,VD rats were divided into a model group,a nimodipine group,and an catgut implantation at acupoint group,and a sham operation group was set up,with 10 rats in each group.On the 7th day after surgery,the treatment groups were given catgut implantation at acupoint and nimodipine gastric lavage for 21 days.After treatment,Morris water maze behavioral test was performed.HE staining was used to observe hippocampal CA1 tissue.CD34 immunohistochemical staining was used to detect hippocampal microvascular density(MVD).Real-time PCR and Western blotting were used to detect the mRNA and protein expression of Ang-1/VEGF and its receptor TIE2/VEGFR2 in the hippocampus.Results Compared with the model group,the average escape latency of the other groups was significantly shortened,and the target quadrant residence time was significantly prolonged(P<0.01,P<0.05).Compared with the model group,the number of nucleolus and well-formed pyramidal cells in hippocampal CA1 area of the catgut implantation at acupoint group and the nimodipine group increased in varying degrees,and they were arranged more closely,with only a few cells scattered and swollen.In the sham surgery group,a few CD34 positive cells were scattered.The treatment groups had more closely distributed CD34 positive cells with significant staining compared to the model group.The MVD of the model group was significantly higher than that of the sham surgery group(P<0.01).Both nimodipine group and catgut implantation at acupoint group had higher MVD than the model group(P<0.05,P<0.01).Compared with the sham surgery group,the mRNA and protein expression of Ang-1/VEGF and its receptor TIE2/VEGFR2 in the model group increased significantly(P<0.01,P<0.05).Compared with the model group,both nimodipine group and catgut implantation at acupoint group had higher mRNA and protein expression of Ang-1/VEGF and its receptor TIE2/VEGFR2(P<0.01,P<0.05).Conclusion Catgut implantation at acupoint can improve the learning and memory abilities in VD rats,promote hippocampal microvascular angiogenesis,which may be related to the up-regulation of Ang-1/VEGF and its receptor TIE2/VEGFR2 mRNA and protein expression.

Objective To investigate the potential value of exosomes derived from rat ectoderm mesenchymal stem cells(EMSCs-exo)for repairing secondary spinal cord injury.Methods EMSCs-exo were obtained using ultracentrifugation from EMSCs isolated from rat nasal mucosa,identified by transmission electron microscope,nanoparticle tracking analysis(NTA),and Western blotting,and quantified using the BCA method.Neonatal rat microglia purified by differential attachment were induced with 100 μg/L lipopolysaccharide(LPS)and treated with 37.5 or 75 mg/L EMSCs-exo.PC12 cells were exposed to 400 μmol/L H2O2 and treated with EMSCs-exo at 37.5 or 75 mg/L.The protein and mRNA expressions of Arg1 and iNOS in the treated cells were determined with Western blotting and qRT-PCR,and the concentrations of IL-6,IL-10,and IGF-1 in the supernatants were measured with ELISA.The viability and apoptosis of PC12 cells were detected using CCK-8 assay and flow cytometry.Results The isolated rat EMSCs showed high expressions of nestin,CD44,CD105,and vimentin.The obtained EMSCs-exo had a typical cup-shaped structure under transmission electron microscope with an average particle size of 142 nm and positivity for CD63,CD81,and TSG101 but not vimentin.In LPS-treated microglia,EMSCs-exo treatment at 75 mg/L significantly increased Arg1 protein level and lowered iNOS protein expression(P<0.05).EMSCs-exo treatment at 75 mg/L,as compared with the lower concentration at 37.5 mg/L,more strongly increased Arg1 mRNA expression and IGF-1 and IL-10 production and decreased iNOS mRNA expression and IL-6 production in LPS-induced microglia,and more effectively promoted cell survival and decreased apoptosis rate of H2O2-induced PC12 cells(P<0.05).Conclusion EMSCs-exo at 75 mg/L can effectively reduce the proportion of M1 microglia and alleviate neuronal apoptosis under oxidative stress to promote neuronal survival,suggesting its potential in controlling secondary spinal cord injury.

Objective To investigate the potential value of exosomes derived from rat ectoderm mesenchymal stem cells(EMSCs-exo)for repairing secondary spinal cord injury.Methods EMSCs-exo were obtained using ultracentrifugation from EMSCs isolated from rat nasal mucosa,identified by transmission electron microscope,nanoparticle tracking analysis(NTA),and Western blotting,and quantified using the BCA method.Neonatal rat microglia purified by differential attachment were induced with 100 μg/L lipopolysaccharide(LPS)and treated with 37.5 or 75 mg/L EMSCs-exo.PC12 cells were exposed to 400 μmol/L H2O2 and treated with EMSCs-exo at 37.5 or 75 mg/L.The protein and mRNA expressions of Arg1 and iNOS in the treated cells were determined with Western blotting and qRT-PCR,and the concentrations of IL-6,IL-10,and IGF-1 in the supernatants were measured with ELISA.The viability and apoptosis of PC12 cells were detected using CCK-8 assay and flow cytometry.Results The isolated rat EMSCs showed high expressions of nestin,CD44,CD105,and vimentin.The obtained EMSCs-exo had a typical cup-shaped structure under transmission electron microscope with an average particle size of 142 nm and positivity for CD63,CD81,and TSG101 but not vimentin.In LPS-treated microglia,EMSCs-exo treatment at 75 mg/L significantly increased Arg1 protein level and lowered iNOS protein expression(P<0.05).EMSCs-exo treatment at 75 mg/L,as compared with the lower concentration at 37.5 mg/L,more strongly increased Arg1 mRNA expression and IGF-1 and IL-10 production and decreased iNOS mRNA expression and IL-6 production in LPS-induced microglia,and more effectively promoted cell survival and decreased apoptosis rate of H2O2-induced PC12 cells(P<0.05).Conclusion EMSCs-exo at 75 mg/L can effectively reduce the proportion of M1 microglia and alleviate neuronal apoptosis under oxidative stress to promote neuronal survival,suggesting its potential in controlling secondary spinal cord injury.

To understand the distribution of ticks in the Wuwei Region,enrich tick species data,and provide a basis for the prevention of tick-borne diseases,tick were collected using flagging and tick-picking methods during the highest activity period from April to September in 2021 and 2022 in the mountainous areas of Wuwei City.The ticks were identified based on morpho-logical and molecular biological characteristics,and characteristic sequences were obtained.A systematic evolutionary tree was constructed using the neighbor-joining method in MEGA 11.0 software.In total,7 342 ticks collected in Wuwei,which be-longed to 5 species from 4 genera with in the Ixodidae family,which included Dermacentor nuttalli,Hyalomma asiaticum,Ixodes canisuga,Haemaphysalis longicornis and Haema-physalis danieli.Ticks of the same species clustered together into the same branch of an evolutionary tree.In the Wuwei Re-gion,five common tick species are found across various habi-tats,with each habitat featuring different distributions of tick species and populations.The Dermacentor nuttalli is the dom-inant tick species in this area.

The current treatment of glioma is facing drug resistance,which limits the efficacy of traditional chemotherapy drugs.This study aims to explore the potential mechanisms of the trifluoromethylquinazoline compound(KZL204)against glioma.Through the Cell Counting Kit-8(CCK-8)assay,we found that KZL204 significantly inhibits the growth of drug-resistant cancer cells,with a 48-hour half-maximal inhibitory concentration(IC50)of 3.63±0.38 μmol/L,which is significantly better than the positive control drug temozolomide(TMZ)(IC50 value of 81.67±5.49 μmol/L).Additionally,flow cytometry analysis showed that KZL204 treatment significantly increased the apoptosis rate of drug-resistant tumor cells and arrested the cell cycle at the G2/M phase.At the same time,the Transwell assay confirmed the inhibitory effect of KZL204 on the migration and invasion of drug-resistant cancer cells.Transcriptome analysis revealed 2 435 differentially expressed genes in drug-resistant cancer cells treated with KZL204,of which 1 320 were upregulated,and 1 115 were downregulated.KEGG and GO enrichment analysis showed that these differential genes were significantly enriched in apoptosis-related signaling pathways.Further bioinformatics prediction and Venn diagram analysis identified 35 potential core targets,with the PI3K-AKT signaling pathway being the most significant among the differentially expressed genes.Quantitative real-time PCR(RT-qPCR)experiments confirmed the downregulating effects of KZL204 on genes such as CREB3L1,CSF1,CXCL5,BCL3,and the upregulating effects on genes like FOS,LT A,PTGS2,MAP2K3.Immunoblotting experiments at the protein level also confirmed the impact of KZL204 on the expression of apoptotic proteins,including the upregulation of Bax,cleaved Caspase-3 protein,and the downregulation ofAKT,Bcl-2,Caspase-3,and Caspase-8 protein expression.In summary,KZL204 significantly inhibits the growth and metastasis of drug-resistant glioblastoma and induces apoptosis and cell cycle arrest by regulating the PI3K-AKT and apoptosis-related signaling pathways,demonstrating its potential as a candidate drug against drug-resistant glioma.

Objective To investigate the incidence rate,clinical characteristics,and prognosis of neonatal stroke in Shenzhen,China.Methods Led by Shenzhen Children's Hospital,the Shenzhen Neonatal Data Collaboration Network organized 21 institutions to collect 36 cases of neonatal stroke from January 2020 to December 2022.The incidence,clinical characteristics,treatment,and prognosis of neonatal stroke in Shenzhen were analyzed.Results The incidence rate of neonatal stroke in 21 hospitals from 2020 to 2022 was 1/15 137,1/6 060,and 1/7 704,respectively.Ischemic stroke accounted for 75％(27/36);boys accounted for 64％(23/36).Among the 36 neonates,31(86％)had disease onset within 3 days after birth,and 19(53％)had convulsion as the initial presentation.Cerebral MRI showed that 22 neonates(61％)had left cerebral infarction and 13(36％)had basal ganglia infarction.Magnetic resonance angiography was performed for 12 neonates,among whom 9(75％)had involvement of the middle cerebral artery.Electroencephalography was performed for 29 neonates,with sharp waves in 21 neonates(72％)and seizures in 10 neonates(34％).Symptomatic/supportive treatment varied across different hospitals.Neonatal Behavioral Neurological Assessment was performed for 12 neonates(33％,12/36),with a mean score of(32±4)points.The prognosis of 27 neonates was followed up to around 12 months of age,with 44％(12/27)of the neonates having a good prognosis.Conclusions Ischemic stroke is the main type of neonatal stroke,often with convulsions as the initial presentation,involvement of the middle cerebral artery,sharp waves on electroencephalography,and a relatively low neurodevelopment score.Symptomatic/supportive treatment is the main treatment method,and some neonates tend to have a poor prognosis.

Objective To predict and verify the mechanism of Naoan capsules(NAC)in treatment of ischemic stroke(IS)by network pharmacology,Gene Expression Omnibus(GEO)database,and molecular docking technology.Methods The active components in NAC were collected using the Traditional Chinese Medicine System Pharmacological Analysis Platform,and the disease-related differential genes were screened using GEO database.After screening and obtaining the common targets of the two,the compound disease network was constructed by Cytoscape 3.8.2 software.At the same time,protein-protein interaction networks were created to identify candidate targets for NAC treatment of IS,and gene ontology and Kyoto encyclopedia of genes and genomes enrichment analyses were performed.Finally,core targets were verified by molecular docking technology.Results A total of 56 candidate compounds and 18 544 disease-related differential genes were screened.Further,quercetin,kaempferol,luteolin and baicalein were found to be the key active compounds of NAC in the treatment of IS through the compound disease network.In the search of PPI network core,eight key targets for NAC treatment of IS were screened,including mitogen-activated protein kinase 1(MAPK1),B-cell lymphoma factor 2(Bcl-2),cysteinylaspartate specific protease 3(CASP3),etc.In addition,the key pathways of NAC treatment of IS are mainly concentrated in lipid and atherosclerosis,advanced glycation end products and receptor for advanced glycation end products(AGE-RAGE),tumor necrosis factor(TNF),interleukin17(IL-17),C-type lectin receptor,apoptosis,hypoxia-inducing factor-1(HIF-1),MAPK and other signaling pathways.Finally,the molecular docking results showed that the key active compounds(quercetin,kaempferol,luteolin and baicalein)had good binding force with the 8 key targets,which initially verified the results of network pharmacology.Conclusion NAC plays a role in the treatment of IS through multi-component,multi-target and multi-pathway.

OBJECTIVES: The magnesium depletion score (MDS) is considered more reliable than traditional approaches for predicting magnesium deficiency in humans. We explored the associations of MDS and dietary magnesium intake with diabetes. METHODS: We obtained data from 18,853 participants in the National Health and Nutrition Examination Survey 2011-2018. Using multivariate regression and stratified analysis, we investigated the relationships of both MDS and magnesium intake with diabetes. To compute prevalence ratios (PRs), we employed modified Poisson or log-binomial regression. We characterized the non-linear association between magnesium intake and diabetes using restricted cubic spline analysis. RESULTS: Participants with MDS ≥2 exhibited a PR of 1.26 (95% confidence interval [CI], 1.19 to 1.34) for diabetes. Per-standard deviation (SD) increase in dietary magnesium intake was associated with a lower prevalence of diabetes (PR, 0.91; 95% CI, 0.87 to 0.96). Subgroup analyses revealed a positive association between MDS ≥2 and diabetes across all levels of dietary magnesium intake, including the lowest (PR, 1.35; 95% CI, 1.18 to 1.55), middle (PR, 1.23; 95% CI, 1.12 to 1.35), and highest tertiles (PR, 1.25; 95% CI, 1.13 to 1.37; pinteraction<0.001). Per-SD increase in magnesium intake was associated with lower diabetes prevalence in participants with MDS <2 (PR, 0.92; 95% CI, 0.87 to 0.98) and those with MDS ≥2 (PR, 0.91; 95% CI, 0.84 to 0.98; pinteraction=0.030). CONCLUSIONS MDS is associated with diabetes, particularly among individuals with low magnesium intake. Adequate dietary magnesium intake may reduce diabetes risk, especially in those with high MDS.

OBJECTIVE: To explore the similarities and variations of biological phenotype and cytotoxicity of human umbilical cord blood natural killer cells (hUC- NK) after human umbilical cord blood-derived mononuclear cells (hUC-MNC) activated and expanded by two in vitro high-efficient strategies. METHODS: Umbilical cord blood mononuclear cells (MNC) from healthy donor were enriched by Ficoll-based density gradient centrifugation. Then, the phenotype, subpopulations, cell viability and cytotoxicity of NK cells derived from Miltenyi medium (denoted as M-NK) and X-VIVO 15 (denoted as X-NK) were compared using a "3IL" strategy. RESULTS: After a 14-day's culture, the contents of CD3^-CD56⁺ NK cells were elevated from 4.25%±0.04% (d 0) to 71%±0.18% (M-NK) and 75.2%±1.1% (X-NK) respectively. Compared with X-NK group, the proportion of CD3⁺CD4⁺ T cells and CD3⁺CD56⁺ NKT cells in M-NK group decreased significantly. The percentages of CD16⁺, NKG2D⁺, NKp44⁺, CD25⁺ NK cells in X-NK group was higher than those in the M-NK group, while the total number of expanded NK cells in X-NK group was half of that in M-NK group. There were no significant differences between X-NK and M-NK groups in cell proliferation and cell cycle, except for the lower percentage of Annexin V+ apoptotic cells in M-NK group. Compared with X-NK group, the proportion of CD107a⁺ NK cells in M-NK group were higher under the same effector-target ratio (E∶T) (P<0.05). CONCLUSION The two strategies were adequate for high-efficient generation of NK cells with high level of activation in vitro, however, there are differences in biological phenotypes and tumor cytotoxicity.
Humans ; Fetal Blood ; Killer Cells, Natural ; T-Lymphocytes ; Leukocytes, Mononuclear/metabolism* ; Cell Proliferation ; CD56 Antigen/metabolism*