This study aims to explore the impact of host plants on the quality of Taxilli Herba and provide a theoretical basis for the quality control of Taxilli Herba. The components of Taxilli Herba from three different host plants(Morus alba, Salix babylonica, and Cinnamomum cassia) and its 3 hosts(mulberry branch, willow branch, and cinnamon branch) were detected by widely targeted metabolomics based on ultra-high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS). Principal component analysis(PCA), orthogonal partial least squares discriminant analysis(OPLS-DA), and Venn diagram were employed for analysis. A total of 717 metabolites were detected in Taxilli Herba from the three host plants and the branches of these host plants by UPLC-MS/MS. The results of PCA and OPLS-DA of Taxilli Herba from the three different host plants showed an obvious separation trend due to the different effects of host plants. The Venn diagram showed that there were 32, 8, and 26 characteristic metabolites in samples of Taxilli Herba from M. alba host, S. babylonica host, and C. cassia host, respectively. It was found by comparing the characteristic metabolites of Taxilli Herba and its hosts that each host transmits its characteristic components to Taxilli Herba, so that the Taxilli Herba contains the characteristic components of the host. The Kyoto Encyclopedia of Genes and Genomes(KEGG) pathway analysis showed that the differential metabolites of Taxilli Herba from the three hosts were mainly enriched in flavonoid biosynthesis, arginine and proline metabolism, and glycolysis/gluconeogenesis pathways. Furthermore, the differential metabolites enriching pathways of Taxilli Herba from the three hosts were different depending on the host. In a word, host plants have a significant impact on the metabolites of Taxilli Herba, and it may be an important factor for the quality of Taxilli Herba.
Metabolomics/methods* ; Drugs, Chinese Herbal/chemistry* ; Chromatography, High Pressure Liquid ; Tandem Mass Spectrometry ; Quality Control ; Salix/chemistry* ; Cinnamomum aromaticum/metabolism* ; Principal Component Analysis

OBJECTIVE: To investigate the effect of LINC00641 on the viability and apoptosis of acute myeloid leukemia (AML) cells and its mechanism. METHODS: RT-qPCR was applied to detect the relative expression levels of LINC00641, miR-204-5p, and MT1X in human normal bone marrow stromal cell lines HS-5 and AML cell lines, and to screen the optimal cell line THP-1 was screened for subsequent experiments. Bioinformatics, dual luciferase reporter assay, pull down assay, and RIP assay were applied to validate the targeting relationship between LINC00641, MT1X and miR-204-5p. EdU, CCK-8, flow cytometry, and Transwell assay were applied to detect cell proliferation, apoptosis, migration and invasion, respectively. Western blot was applied to detect the expression of MT1X , CyclinD1, Bcl-2, and Bax proteins. RESULTS: Compared with HS-5 cells, the expression of LINC00641 and MT1X was obviously increased in HL60, THP-1, U937, and KG1 cells, while the expression of miR-204-5p was obviously reduced (all P <0.05). THP-1 cells showed the most obvious changes (P <0.05). Silencing LINC00641 or overexpressing miR-204-5p was able to obviously inhibit the proliferation, migration and invasion of THP-1 cells, as well as the expression of CyclinD1 and Bcl-2 proteins, while promote cells apoptosis and Bax protein expression (all P <0.05). Bioinformatics analysis, dual luciferase reporter assay, pull down assay, and RIP assay all confirmed that there were targeted relationships between LINC00641, MT1X and miR-204-5p. Inhibiting miR-204-5p or overexpressing MT1X was able to respectively reverse the inhibitory effect of silencing LINC00641 or overexpressing miR-204-5p on THP-1 cells proliferation, migration and invasion, and reduce cells apoptosis. CONCLUSION LINC00641 is highly expressed in AML, and inhibition of LINC00641 expression can inhibit cell proliferation, migration, and invasion and increase apoptosis by regulating the miR-204-5p/MT1X axis.
Humans ; Apoptosis ; Leukemia, Myeloid, Acute/pathology* ; MicroRNAs ; Cell Proliferation ; RNA, Long Noncoding/genetics* ; Cell Movement ; Cell Survival ; Cell Line, Tumor ; HL-60 Cells

Objective To analyze the influencing factors of death in the elderly with coronavirus disease 2019(COVID-19).Methods The case data of death caused by COVID-19 in West China Fourth Hospital from January 1 to July 8,2023 were collected,and surviving cases from the West China Elderly Health Cohort infected with COVID-19 during the same period were selected as the control.LASSO-Logistic regression was adopted to analyze the data after propensity score matching and the validity of the model was verified by drawing the receiver operating characteristic curve.Results A total of 3 239 COVID-19 survivors and 142 deaths with COVID-19 were included.The results of LASSO-Logistic regression showed that smoking(OR=3.33,95%CI=1.46-7.59,P=0.004),stroke(OR=3.55,95%CI=1.15-10.30,P=0.022),malignant tumors(OR=19.93, 95%CI=8.52-49.23, P<0.001),coronary heart disease(OR=7.68, 95%CI=3.52-17.07, P<0.001),fever(OR=0.51, 95%CI=0.26-0.96, P=0.042),difficulty breathing or asthma symptoms(OR=21.48, 95%CI=9.44-51.95, P<0.001),and vomiting(OR=8.19,95%CI=2.87-23.58, P<0.001)increased the risk of death with COVID-19.The prediction model constructed based on the influencing factors achieved an area under the curve of 0.889 in the test set.Conclusions Smoking,stroke,malignant tumors,coronary heart disease,fever,breathing difficulty or asthma symptoms,and vomiting were identified as key factors influencing the death risk in COVID-19.
Humans ; COVID-19/mortality* ; Aged ; Propensity Score ; China/epidemiology* ; Risk Factors ; Logistic Models ; Smoking ; SARS-CoV-2 ; Male ; Female ; Stroke ; Neoplasms

Aim To explore the protective effect of an-thocyanin B2(PCB2)on hydrogen peroxide(H2O2)induced oxidative damage and apoptosis in human oli-godendrocytes(MO3.13)and the underlying mecha-nism.Methods The optimal concentration of H2O2 and PCB2 for action was screened,and divided into normal group,PCB2 group(100 mg·L-1 PCB2 treat-ment for 24 hours),H2 O2 model group(500 μmol·L-1 H2O2 treatment for 24 hours),and H2O2+PCB2 group(500 μmol·L-1 H2O2 and 100 mg·L-1 PCB2 co-treated for 24 hours).FRAP method was used to detect the antioxidant capacity of PCB2;CCK-8 meth-od was used to detect the survival rate of cells in each group,while LDH method was used to assess cytotoxic-ity.Microenzyme-linked immunosorbent assay and ELISA were used to examine the levels of LDH,NO,H2O2,as well as the activities of CAT and SOD in each group of cells.Immunofluorescence and Western blot were used to detect the protein expression levels of NRF2,xCT,HO-1,ferritin,and GPX4 in each group of cells.FerroOrange fluorescent probe was used to de-tect the intracellular content of ferrous ions(Fe2+).Results H2O2 could induce MO3.13 oxidative dam-age and lead to cell ferroptosis,while PCB2 could alle-viate MO3.13 oxidative damage and ferroptosis.Com-pared with the H2O2 model group,PCB2 intervention could significantly increase LDH content in MO3.13,reduce NO and H2O2 content,and improve SOD and CAT activity,and up-regulate the protein expression levels of NRF2,xCT,HO-1,ferritin,and GPX4.Conclusion PCB2 can enhance cellular antioxidant capacity and alleviate H2O2 induced MO3.13 oxidative damage through the NRF2/HO-1/xCT/GPX4 axis.

Microglia are resident immune cells in the central nervous system(CNS),it play an important role in both physio-logical and pathological conditions of the CNS,and can be activated by a variety of physicochemical factors to produce pro-inflammato-ry phenotype(M1 type)and anti-inflammatory phenotype(M2 type).Milk fat globule epidermal growth factor 8(MFG-E8)is closely related to the biological function of microglia,which can regulate microglia neuroprotective effects such as promoting phagocytosis,anti-inflammatory,and inhibiting oxidative stress in CNS related diseases.It also regulates microglia pro-tumor effect,which in turn affects the outcome of the disease.This article reviews the role of targeting MFG-E8 in regulating the function of microglia,and provides a basis for finding therapeutic targets for CNS related diseases in the future.

Objective To investigate the regulatory effects of plasma-derived exosomal microRNA-1306-5p(miR-1306-5p)on inflammation,apoptosis and oxidative stress in intestinal mucosal epithelial cells in sepsis,and to explore the potential mechanisms.Methods Sepsis plasma-derived exosomes and healthy plasma exo-somes were separated and divided into healthy plasma exosomes group and sepsis plasma-derived exosomes group.The exosomes were observed by electron microscopy,the physical parameters of the two groups of exo-somes were analyzed,and the expression of miR-1306-5p in the exosomes was detected.Intestinal mucosal epi-thelial cells were divided into control group,negative control group of miR-1306-5p mimic(mimic-NC group),miR-1306-5p mimic group(mimic group),mimic combined with overexpression of PLK1 empty vector group(mimic-PLK1-EV group),and mimic combined with overexpression of Polo-like kinase 1(PLK1)group(mimic+PLK1-OE group).Real-time fluorescent quantitative PCR was used to detect the mRNA expressions of miR-1306-5p and PLK1 in each group,and protein imprinting was used to detect the expressions of miR-1306-5p target genes PLK1,caspase 3,B lymphoblastoma-2(Bcl-2)and Bcl2-associated X protein(Bax).Dual luciferase reporter gene assay was used to detect the binding effect of miR-1306-5p and PLK1,and flow cytom-etry was used to detect apoptosis.The expressions of tumor necrosis factor-α(TNF-α),interleukin(IL)-1β,IL-6 and IL-8 in the supernatant of cultured cells were detected by enzyme-linked immunosorbent assay.The expressions of reactive oxygen species(ROS),malondialdehyde(MDA),glutathione(GSH)and superoxide dismutase(SOD)were detected by kit method.Results The plasma derived exosomes of sepsis and healthy plasma were ellipsoid in shape,and there was no significant difference in physical parameters(P＞0.05).Compared with the healthy plasma exosomes group,the expression of miR-1306-5p was up-regulated in the plasma derived exosomes of sepsis group(P＜0.05).PLK1 was identified as the target gene of miR-1306-5p by double luciferase reporter method.Compared with mimic-NC group,the expressions of miR-1306-5p,TNF-α,IL-6,IL-8,IL-1β,caspase3,Bax,ROS and MDA were up-regulated,the apoptosis rate was increased,and the expressions of PKL1,Bcl-2,GSH and SOD were down-regulated in mimic group(all P＜0.05).Compared with mimic+PLK1-EV group,the expressions of TNF-α,IL-6,IL-8,IL-1β,caspase3,Bax,ROS,and MDA were significantly down-regulated,the apoptosis rate was decreased,and the expressions of PKL1,Bcl-2,GSH and SOD were up-regulated in mimic+PLK1-OE group(all P＜0.05).Conclusion Plasma derived exosome miR-1306-5p in sepsis promotes inflammation,apoptosis and oxidative stress damage of intestinal mucosal epi-thelial cells by targeting PKL1 inhibition.

Objective To construct a recombinant eukaryotic expression vector of human tumor suppressor p53-binding protein 2(TP53BP2)and transfect human embryonic kidney Expi293F cells.High-purity recombinant human full-length TP53BP2 protein was obtained and its biological activity was identified.Methods The TP53BP2 gene sequence was queried on the UniProt website,and the Expi293F expression system was optimized.The TP53BP2 gene was connected to pcDNA3.1(+)-P2A-eGFP vector by homologous recombination,and identified by double enzyme digestion and sequencing.Transect pcDNA3.1(+)-P2A-eGFP-TP53BP2 plasmid into Expi293F cells of Polyethylenimine(PEI),observe the transfection efficiency with a fluorescence microscope,collected cells from the experiment group and control group.The expression level of TP53BP2 recombinant protein was detected by Western blot(WB).Protein was purified by His label purification kit and Superdex 20010/300 GL chromatographic column.Sodium dodecyl sulfate-polyacrylamide gel electrophoresis.The purified recombinant protein was identified by SDS-PAGE.Combining recombinant human full-length TP53BP2 protein with p65 protein was investigated for Co-immunoprecipitation(Co-IP)precipitation.Recombinant human full-length TP53BP2 protein was co-localized with p65 protein by Immunofluorescence(IF).The surface plasmon resonance(SPR)technique was used to detect the interaction between purified recombinant human full-length TP53BP2 protein and TP53BP2 antibody.Results The recombinant plasmid pcDNA3.1(+)-P2A-eGFP-TP53BP2 was successfully constructed by sequencing and double digestion.The fluorescence microscopy results showed that the transfection efficiency was about 60%.WB showed that the TP53BP2 protein was overexpressed in Expi293F cells,which proved that transfection was successful.SDS-PAGE results showed that the purity of the purified recombinant protein was above 90%,which proved that the purification was successful.Co-IP results showed that the TP53BP2 could interact with p65 protein.The results of IF showed that His tag protein,TP53BP2 protein,and p65 protein were co-located,indicating the interaction between the three proteins.SPR results showed that the purified TP53BP2 recombinant protein had good binding activity with the TP53BP2 antibody.These results all prove that the recombinant human full-length TP53BP2 protein has biological activity.Conclusion The eukaryotic expression vector of TP53BP2 gene was successfully constructed and the recombinant full-length human TP53BP2 protein with biological activity was successfully expressed in human embryonic kidney Expi293F cells.It lays a foundation for further study on the structure and function of TP53BP2.

Objective To investigate the clinical characteristics,treatment methods,and prognosis of a-cute leukemia patients with extramedullary infiltration.Methods The clinical characteristics and treatment methods of 47 acute leukemia patients with extramedullary infiltration admitted to the Affiliated Hospital of Guizhou Medical University from April 2014 to April 2023 were retrospectively analyzed.Subgroup analysis was performed according to whether there was extramedullary infiltration before transplantation,and whether there was isolated extramedullary recurrence after transplantation.Based on this analysis,the patients were di-vided into the pre-transplantation radiotherapy group and pre-transplantation non-radiotherapy group,the post-transplantation radiotherapy group and post-transplantation non-radiotherapy group.According to the treatment methods of central nervous system leukemia(CNSL),the patients were divided into the intrathecal injection group(n=12)and combination of intrathecal injection and radiotherapy group(n=13).The local remission situation,survival duration,and toxic and side effects of radiotherapy and chemotherapy were com-pared.Results For acute leukemia patients with extramedullary infiltration,the overall survival time(OS)in the radiotherapy group was better than that in the non-radiotherapy group(median OS:706 d vs.151 d,P=0.015).Subgroup analysis showed that the OS of the pre-transplantation radiotherapy group was better than that of the pre-transplantation non-radiotherapy group(median OS:592 d vs.386 d,P=0.035).For CNSL,the combination of intrathecal injection and radiotherapy group had a better OS than the intrathecal injection group(median OS:547 d vs.388 d,P=0.045).The event-free survival time(EFS)of the radiotherapy group was better than that of the non-radiotherapy group(median EFS:175 d vs.50 d,P=0.005).The COX pro-portional-hazards model showed that treatment with or without radiotherapy had a significant impact on the OS of acute leukemia patients with extramedullary infiltration.The risk of death in the pre-transplantation non-radiotherapy group was 2.231 times higher than that in the pre-transplantation radiotherapy group(HR=3.231,95％CI:1.021-10.227,P=0.046).Compared with the non-radiotherapy group,the radiother-apy group had a higher local remission and a lower risk of haematological toxicity,infection,and haemorrhage.Conclusion Radiotherapy can rapidly alleviate the local symptoms of acute leukemia complicated with extr-amedullary infiltration,prolong the survival time of these patients,and reduce the risk of hematologic toxicity,infection,and haemorrhage.

OBJECTIVE: To explore the effect of dichloromethane extraction phase of ethanol extract from stem of Patrinia scabiosaefolia Fisch.(DPSS) on proliferation and differentiation of K562 cells and its related mechanism. METHODS: MTT assay was used to detect the effects of DPSS at 0, 25, 50, 100 and 200 μg/ml on the proliferation of K562 cells at 24, 48 and 72 hours. Flow cytometry was used to analyze the changes of cell cycle and apoptosis at 24 and 48 hours. Wright-Giemsa staining was used to observe the morphological changes of K562 cells. The cell surface antigens CD33 and CD11b were detected by flow cytometry. RESULTS: The proliferation of K562 cells treated with different concentrations of DPSS was inhibited in a time-dose dependent manner (r=-0.96). Cell cycle analysis showed that with the increase of DPSS concentration, cells in G₂/M phase increased (r=0.88), and cells were blocked in G₂/M phase. Flow cytometry results showed that with the apoptosis rate of K562 cells was the highest when treated with 200 μg/ml DPSS for 48 h. Morphological observation showed that the K562 cell body increased, the amount of cytoplasm increased, the ratio of nucleus to cytoplasm decreased, and the nuclear chromatin was rough after DPSS treatment. Cell differentiation antigen, CD33 and CD11b, were positively expressed after treated with DPSS. CONCLUSION DPSS can induce apoptosis through cell cycle arrest, inhibit the proliferation of K562 cells, and induce K562 cells to differentiate into monocytes, which has a potential anti-leukemia effect.
Humans ; K562 Cells ; Patrinia ; Methylene Chloride/pharmacology* ; Apoptosis ; Cell Proliferation ; Cell Differentiation