Objective To investigate the role and potential mechanism of secreted phosphoprotein 1 (SPP1)⁺ macrophages in the formation of chronic renal allograft fibrosis. Methods The expression features of SPP1⁺ macrophages in renal allografts of chronic allograft dysfunction (CAD) patients were analyzed based on single-cell transcriptome data of renal tissues from patients with CAD. Transcription factor VIPER analysis and DoRothEA transcription factor activity analysis were performed on the single-cell transcriptome data. Renal tissue samples were collected from kidney transplant recipients, including the CAD group (n=5) and the non-renal allograft fibrosis group (CTL group, n=5). A mouse model of chronic allograft rejection was established and divided into the allogeneic kidney transplantation group (CAD group, n=3) and the syngeneic kidney transplantation group (SYN group, n=3). Hematoxylin-eosin staining was used to detect renal tissue injury in mice, and Masson staining was used to detect renal tissue fibrosis. Immunofluorescence staining was performed to detect SPP1 expression in renal tissues of transplant recipients and mouse renal allografts. Bone marrow-derived macrophages (BMDMs) were extracted from mice and subjected to hypoxia stimulation. The expression of hypoxia-inducible factor (HIF)-1α and SPP1 was detected by Western blot, and SPP1 expression was detected by flow cytometry. BMDMs were transfected with HIF-1α overexpression plasmid and HIF-1α small interfering RNA (siRNA) followed by hypoxia intervention, and the expression of HIF-1α and SPP1 was detected by Western blot. Mouse aortic endothelial cells (MAECs) were co-cultured with the supernatant of BMDMs, and the expression of endothelial-mesenchymal transition (EndMT)-related markers was detected by Western blot and immunofluorescence. Results Single-cell transcriptome analysis showed that the proportion of SPP1⁺ macrophages in renal allograft tissues was significantly higher in the CAD group than in the CTL group (P<0.05). The renal injury score and the percentage of interstitial fibrotic area in the CAD group were significantly higher than those in the SYN group (both P<0.05). Immunofluorescence staining showed that the proportion of SPP1⁺ macrophages was increased in the CAD group compared with the CTL group, and also increased in the CAD group compared with the SYN group (both P<0.05). VIPER analysis and DoRothEA transcription factor activity analysis revealed activation of the hypoxia pathway and upregulated expression of transcription factors such as HIF-1α in SPP1⁺ macrophages. SPP1 expression was elevated in BMDMs under hypoxic conditions. Knockdown of HIF-1α inhibited hypoxia-induced SPP1 protein expression, whereas overexpression of HIF-1α upregulated SPP1 protein levels. After co-culture of hypoxia-induced BMDMs with MAECs, the expression levels of EndMT-related markers were increased. Conclusions SPP1⁺ macrophages differentiated under hypoxia are significantly infiltrated in the formation of chronic renal allograft fibrosis, and may promote renal allograft fibrosis by inducing EndMT in renal vascular endothelial cells.

In recent years, hybrid brain-computer interfaces (BCIs) have gained significant attention due to their demonstrated advantages in increasing the number of targets and enhancing robustness of the systems. However, Existing studies usually construct BCI systems using intense auditory stimulation and strong central visual stimulation, which lead to poor user experience and indicate a need for improving system comfort. Studies have proved that the use of peripheral visual stimulation and lower intensity of auditory stimulation can effectively boost the user's comfort. Therefore, this study used high-frequency peripheral visual stimulation and 40-dB weak auditory stimulation to elicit steady-state visual evoked potential (SSVEP) and auditory steady-state response (ASSR) signals, building a high-comfort hybrid BCI based on weak audio-visual evoked responses. This system coded 40 targets via 20 high-frequency visual stimulation frequencies and two auditory stimulation frequencies, improving the coding efficiency of BCI systems. Results showed that the hybrid system's averaged classification accuracy was (78.00 ± 12.18) %, and the information transfer rate (ITR) could reached 27.47 bits/min. This study offers new ideas for the design of hybrid BCI paradigm based on imperceptible stimulation.
Brain-Computer Interfaces ; Humans ; Evoked Potentials, Visual/physiology* ; Acoustic Stimulation ; Photic Stimulation ; Electroencephalography ; Evoked Potentials, Auditory/physiology* ; Adult

Objective:To analyze the epidemiological, etiological characteristics and transmission of an imported D8 genotype measles case in a child in Shandong Province, August 2023.Methods:A study was conducted on a measles case and 16 contacts in Shandong Province in August 2023. Field epidemiological surveys, including recent exposure and immunization history, were conducted. Serum and throat swab samples were collected from all 16 subjects. Measles IgM and IgG antibody levels and avidity were measured by ELISA, while virus detection and genotyping were performed using fluorescence quantitative PCR and RT-PCR. Genetic evolutionary analysis of the obtained sequences was conducted using MEGA and Beast software.Results:The case was an 11-year-old boy, a fifth-grade student, who developed symptoms on August 28, 2023. A total of five close contacts were investigated, including three family members (grandfather, father and sister) and two playmates. Additionally, 11 classmates who had close contact with the case′s sister during the infectious period (within five days after the rash onset) were also investigated. Among the 16 serum samples tested, only one case was positive for IgM, while the other 15 samples were negative for IgM. The results of the serum antibody avidity test showed that among the 16 serum samples, 14 were positive for IgG. Of these, eight had a relative avidity index >55%, indicating high-avidity antibodies; one had a relative avidity index <45%, indicating low-avidity antibodies; and five had an avidity index between 45% and 55%. The IgG detection OD values for the case′s sister and grandfather were higher than those of the other contacts. Based on the vaccination history of the subjects and the results of IgM and IgG tests, it was preliminarily determined that the case had a recent wild-type measles virus infection. The case′s sister and grandfather had a history of measles wild-type virus infection, while the high-avidity antibodies in the other contacts were likely induced by the measles vaccine. The results of the pharyngeal swab tests showed that only the case was positive for measles virus nucleic acid, while the remaining 15 samples were negative for measles virus. The genetic evolutionary analysis revealed that the viral sequence of this case (Mvs/Shandong.CHN/38.23) had a 100% homology with the Hong Kong strain sequence from August 2023. It belonged to a different transmission chain from the D8 genotype strains that appeared in Shandong Province between 2018 and 2019, with sequence homology ranging from 98.0% to 98.8%. The sequence homology within the transmission chain of this case was between 99.1% and 100%. The evolutionary rate of this transmission chain was approximately 8.38×10 -3 sub/site/year, and the most recent common ancestor was estimated to have emerged around the year 2011. Conclusion:This case is the first imported D8 genotype measles case in Shandong Province. There is no spatio-temporal correlation between this case and adult cases of D8 genotype imported from Shandong Province in 2018-2019, indicating a new D8 genotype imported epidemic.

To explore the impacts of TGR5 on liver lipid metabolism and bile acid synthesis in dairy cows with fatty liver.Liver tissues of healthy cows and cows with fatty liver were collected through puncture technique.The protein and mRNA expressions of lipid synthesis-related factors ACC1,FAS,SREBF1,lipid oxidation factor CPT1A,and bile acid synthesis-related factors CYP8B1,CYP7B1,CYP27A1 were detected by Western blot and fluorescent quantitative PCR.Moreover,the mRNA levels of CYP7B1 were determined.Primary hepatocytes of 1-day-old calves were extracted and cultured in vitro,and four treatment groups were established,namely Control,NEFA,INT-777,and the INT-777+NEFA group.The concentration of NEFA group was 1.2 mmol/L,the con-centration of INT-777 group was 1 μmol/L,and the concentration of INT-777+NEFA group was 1.2 mmol/L NEFA and 1 μmol/L INT-777 simultaneously.After 12 h of stimulation,cells were collected,and the protein and mRNA levels of ACC1,FAS,SREBF1,CPT1A,CYP8B1,CYP7A1,CYP27A1,and the mRNA levels of CYP7B1 were detected by Western blot and fluorescent quanti-tative PCR.The content of lipid droplets and TG in the cells were detected by flow cytometry and kit.The results demonstrated that compared with healthy cows,the protein and mRNA expressions of ACC1,FAS,SREBF1,CYP8B1,and CYP7A1 in the liver tissues of fatty liver cows were upreg-ulated,while the protein and mRNA levels of CPT1 A,CYP27A1,TGR5,and the mRNA levels of CYP7B1 were downregulated.In vitro experiments revealed that compared with the Control group,the protein and mRNA levels of ACC1,FAS,SREBF1,CYP8B1,and CYP7A1 in the NEFA group were upregulated,and the protein and mRNA levels of CPT1A,CYP27A1,and TGR5,as well as the mRNA level of CYP7B1,were downregulated.Compared with the NEFA group,the protein and mRNA levels of ACC1,FAS,SREBF1,CYP8B1,CYP7A1 were downregulated in the INT-777+NEFA group,while the protein and mRNA levels of CPT1A CYP27A1,and TGR5 as well as the mRNA level of CYP7B1,were upregulated.The results of flow cytometry and the kit indicated that the lipid droplets and TG content in the NEFA group were upregulated compared with the Control group,while the lipid droplets and TG content in the INT-777+NEFA group were downregulated compared with the NEFA group.The above results suggested that the addition of TGR5 agonist promoted the expression of TGR5 and ameliorated the abnormal lipid metabolism and bile acid synthesis in the liver of dairy cows with fatty liver.

The purpose of this study was to investigate the effect of medium-chain fatty acids(MC-FAs)caprylic acid(C8∶0)on lipid metabolism of calf hepatocytes.Primary calf hepatocytes were extracted and cultured,and 1.2 mmol/L nonesterified fatty acids(NEFAs)were added to the hep-atocytes to construct a model of hepatic lipid deposition in primary calf hepatocytes,Five process-ing groups have been set up:Control group(Ctrl),NEFA added group(NEFA),C8∶0 1.2 mmol/L treatment group(C8∶0 1.2),NEFA+C8∶0 0.2 mmol/L treatment group(NEFA+C8∶00.2),C8∶0 0.2 mmol/L treatment group(C8∶0 0.2).Stimulate calf liver cells for 12 hours,and the levels of triglyceride(TG),lipid oxidation(MDA),hydrogen peroxide(H2O2)and total SOD activity were detected by biochemical kit,and FAS,a protein related to lipid synthesis,was detec-ted by Western blot.The results showed that compared with the control group,the concentrations of TG,MDA and H2O2 in NEFA group increased significantly(P＜0.01),and the activity of SOD decreased significantly(P＜0.05).The protein expression levels of FAS,ACC1,DGAT2 and SREBP-1C were significantly up-regulated(P＜0.01),while the expression level of CPT1A was significantly down-regulated(P＜0.01).Compared with the NEFA group,the protein expression levels of SREBP-1C and DGAT2 in the NEFA+C8∶0(concentration 0.2 mmol/L)group de-creased significantly(P＜0.05),and the protein expression level of fatty acid β-oxidation related molecule CPT1A was slightly higher than that in the NEFA group,but there was no statistical sig-nificance(P＞0.05),and the MDA level in hepatocytes decreased significantly(P＜0.05).In a word,the results of this study show that C8∶0 has antioxidant effect,which can effectively reduce the liver injury caused by oxidative stress,regulate the expression of liver fat gene,and then pro-tect liver injury.

Objective:To analyze the epidemiological, etiological characteristics and transmission of an imported D8 genotype measles case in a child in Shandong Province, August 2023.Methods:A study was conducted on a measles case and 16 contacts in Shandong Province in August 2023. Field epidemiological surveys, including recent exposure and immunization history, were conducted. Serum and throat swab samples were collected from all 16 subjects. Measles IgM and IgG antibody levels and avidity were measured by ELISA, while virus detection and genotyping were performed using fluorescence quantitative PCR and RT-PCR. Genetic evolutionary analysis of the obtained sequences was conducted using MEGA and Beast software.Results:The case was an 11-year-old boy, a fifth-grade student, who developed symptoms on August 28, 2023. A total of five close contacts were investigated, including three family members (grandfather, father and sister) and two playmates. Additionally, 11 classmates who had close contact with the case′s sister during the infectious period (within five days after the rash onset) were also investigated. Among the 16 serum samples tested, only one case was positive for IgM, while the other 15 samples were negative for IgM. The results of the serum antibody avidity test showed that among the 16 serum samples, 14 were positive for IgG. Of these, eight had a relative avidity index >55%, indicating high-avidity antibodies; one had a relative avidity index <45%, indicating low-avidity antibodies; and five had an avidity index between 45% and 55%. The IgG detection OD values for the case′s sister and grandfather were higher than those of the other contacts. Based on the vaccination history of the subjects and the results of IgM and IgG tests, it was preliminarily determined that the case had a recent wild-type measles virus infection. The case′s sister and grandfather had a history of measles wild-type virus infection, while the high-avidity antibodies in the other contacts were likely induced by the measles vaccine. The results of the pharyngeal swab tests showed that only the case was positive for measles virus nucleic acid, while the remaining 15 samples were negative for measles virus. The genetic evolutionary analysis revealed that the viral sequence of this case (Mvs/Shandong.CHN/38.23) had a 100% homology with the Hong Kong strain sequence from August 2023. It belonged to a different transmission chain from the D8 genotype strains that appeared in Shandong Province between 2018 and 2019, with sequence homology ranging from 98.0% to 98.8%. The sequence homology within the transmission chain of this case was between 99.1% and 100%. The evolutionary rate of this transmission chain was approximately 8.38×10 -3 sub/site/year, and the most recent common ancestor was estimated to have emerged around the year 2011. Conclusion:This case is the first imported D8 genotype measles case in Shandong Province. There is no spatio-temporal correlation between this case and adult cases of D8 genotype imported from Shandong Province in 2018-2019, indicating a new D8 genotype imported epidemic.

To explore the impacts of TGR5 on liver lipid metabolism and bile acid synthesis in dairy cows with fatty liver.Liver tissues of healthy cows and cows with fatty liver were collected through puncture technique.The protein and mRNA expressions of lipid synthesis-related factors ACC1,FAS,SREBF1,lipid oxidation factor CPT1A,and bile acid synthesis-related factors CYP8B1,CYP7B1,CYP27A1 were detected by Western blot and fluorescent quantitative PCR.Moreover,the mRNA levels of CYP7B1 were determined.Primary hepatocytes of 1-day-old calves were extracted and cultured in vitro,and four treatment groups were established,namely Control,NEFA,INT-777,and the INT-777+NEFA group.The concentration of NEFA group was 1.2 mmol/L,the con-centration of INT-777 group was 1 μmol/L,and the concentration of INT-777+NEFA group was 1.2 mmol/L NEFA and 1 μmol/L INT-777 simultaneously.After 12 h of stimulation,cells were collected,and the protein and mRNA levels of ACC1,FAS,SREBF1,CPT1A,CYP8B1,CYP7A1,CYP27A1,and the mRNA levels of CYP7B1 were detected by Western blot and fluorescent quanti-tative PCR.The content of lipid droplets and TG in the cells were detected by flow cytometry and kit.The results demonstrated that compared with healthy cows,the protein and mRNA expressions of ACC1,FAS,SREBF1,CYP8B1,and CYP7A1 in the liver tissues of fatty liver cows were upreg-ulated,while the protein and mRNA levels of CPT1 A,CYP27A1,TGR5,and the mRNA levels of CYP7B1 were downregulated.In vitro experiments revealed that compared with the Control group,the protein and mRNA levels of ACC1,FAS,SREBF1,CYP8B1,and CYP7A1 in the NEFA group were upregulated,and the protein and mRNA levels of CPT1A,CYP27A1,and TGR5,as well as the mRNA level of CYP7B1,were downregulated.Compared with the NEFA group,the protein and mRNA levels of ACC1,FAS,SREBF1,CYP8B1,CYP7A1 were downregulated in the INT-777+NEFA group,while the protein and mRNA levels of CPT1A CYP27A1,and TGR5 as well as the mRNA level of CYP7B1,were upregulated.The results of flow cytometry and the kit indicated that the lipid droplets and TG content in the NEFA group were upregulated compared with the Control group,while the lipid droplets and TG content in the INT-777+NEFA group were downregulated compared with the NEFA group.The above results suggested that the addition of TGR5 agonist promoted the expression of TGR5 and ameliorated the abnormal lipid metabolism and bile acid synthesis in the liver of dairy cows with fatty liver.

The purpose of this study was to investigate the effect of medium-chain fatty acids(MC-FAs)caprylic acid(C8∶0)on lipid metabolism of calf hepatocytes.Primary calf hepatocytes were extracted and cultured,and 1.2 mmol/L nonesterified fatty acids(NEFAs)were added to the hep-atocytes to construct a model of hepatic lipid deposition in primary calf hepatocytes,Five process-ing groups have been set up:Control group(Ctrl),NEFA added group(NEFA),C8∶0 1.2 mmol/L treatment group(C8∶0 1.2),NEFA+C8∶0 0.2 mmol/L treatment group(NEFA+C8∶00.2),C8∶0 0.2 mmol/L treatment group(C8∶0 0.2).Stimulate calf liver cells for 12 hours,and the levels of triglyceride(TG),lipid oxidation(MDA),hydrogen peroxide(H2O2)and total SOD activity were detected by biochemical kit,and FAS,a protein related to lipid synthesis,was detec-ted by Western blot.The results showed that compared with the control group,the concentrations of TG,MDA and H2O2 in NEFA group increased significantly(P＜0.01),and the activity of SOD decreased significantly(P＜0.05).The protein expression levels of FAS,ACC1,DGAT2 and SREBP-1C were significantly up-regulated(P＜0.01),while the expression level of CPT1A was significantly down-regulated(P＜0.01).Compared with the NEFA group,the protein expression levels of SREBP-1C and DGAT2 in the NEFA+C8∶0(concentration 0.2 mmol/L)group de-creased significantly(P＜0.05),and the protein expression level of fatty acid β-oxidation related molecule CPT1A was slightly higher than that in the NEFA group,but there was no statistical sig-nificance(P＞0.05),and the MDA level in hepatocytes decreased significantly(P＜0.05).In a word,the results of this study show that C8∶0 has antioxidant effect,which can effectively reduce the liver injury caused by oxidative stress,regulate the expression of liver fat gene,and then pro-tect liver injury.

ObjectiveTo evaluate the efficacy and safety of first-line transcatheter arterial chemoembolization （TACE） combined with targeted therapy and immunotherapy in the treatment of patients with stage Ⅱb/Ⅲa hepatocellular carcinoma （HCC） based on China Liver Cancer Staging （CNLC）. MethodsA total of 198 patients who received first-line TACE combined with targeted therapy and immunotherapy or received TACE alone from January 2015 to December 2022 in the First Affiliated Hospital of Soochow University were enrolled in this study， and after propensity score matching， there were 50 patients in combination group and 50 patients in TACE group. The Kaplan-Meier method was used to calculate median overall survival （mOS） and median progression-free survival （mPFS）. Modified Response Evaluation Criteria in Solid Tumors was used to evaluate objective response rate （ORR） and disease control rate （DCR）， and Common Terminology Criteria for Adverse Events v5.0 was used to evaluate adverse events. The chi-square test was used for comparison of categorical data between two groups； the t-test was used for comparison of normally distributed continuous data between two groups， and the Wilcoxon rank-sum test was used for comparison of non-normally distributed continuous data between two groups. The Kaplan-Meier method was used to estimate survival time and calculate 95% confidence interval （CI）， and the Log-rank test was used for comparison of mOS and mPFS between two groups. ResultsThe combination group had an mOS of 30.1 months （95%CI： 21.9‍ ‍—‍ ‍38.3）， and the TACE group had an mOS of 14.5 months （95%CI： 11.0 ‍—‍‍ ‍18.0）， with a significant difference between the two groups （χ²=17.8， P<0.001）； the combination group had an mPFS of 10.3 months （95%CI： 8.8‍ ‍—‍ ‍11.8）， and the TACE group had an mPFS of 7.1 months （95%CI： 5.8‍ — ‍8.4）， with a significant difference between the two groups （χ²=10.4， P<0.001）. There were significant differences between the combination group and the TACE group in ORR （84% vs 58%， P<0.05） and DCR （94% vs 80%， P<0.05）. There was no significant difference between the combination group and the TACE group in the incidence rate of adverse events （24% vs 16%， P=0.317）， and no adverse event-related deaths were observed in either group. ConclusionCompared with TACE alone， TACE combined with targeted therapy and immunotherapy has a better efficacy in the treatment of patients with CNLC stage Ⅱb/Ⅲa HCC， without increasing the incidence rate of severe adverse events.

BACKGROUND:At present,wrist protection products designed in and outside China have not solved the contradiction between protecting the wrist joint from injury and maintaining the flexible movement of the wrist joint. OBJECTIVE:To investigate the biomechanical mechanism of dorsiflexion injury of the wrist joint in elderly people after falls,and to provide a biomechanical basis for the prevention and treatment of wrist injury in elderly people after falls. METHODS:A 65-year-old man was selected to obtain the original data by uninterrupted CT scan of the middle and lower 2/3 of his left forearm up to the end of the finger.A finite element model of wrist dorsiflexion was established using ANSYS 12.0 finite element software.The palm surface of the model was constrained,and the model at a velocity load of 2 m/s in the direction of vertical downward was given to simulate the injury state of the palm when the elderly fall.The stress distribution of the soft tissues and bones of the wrist joint and the change of the stress with time were observed after the load was applied. RESULTS AND CONCLUSION:(1)A realistic and effective finite element model of the dorsal extension position of the wrist joint of the elderly was established.The soft tissue stresses were mainly concentrated in the small fissure of the palm and the dorsal side of the wrist after loading.The skeletal stresses were mainly concentrated in the lower end of the ulnar radius dorsally.The stresses in the lower end of the radius were the greatest.The palmar stresses were mainly concentrated in the middle and lower 1/3 of the radius and the hook bone.The stress distribution of the ulnar radius was asymmetric,and the stresses in the radius were more concentrated.(2)The results of the study are consistent with the clinical situation of a fallen wrist injury in elderly people,and can be used to explain the mechanism of wrist dorsiflexion injury,which can provide the biomechanical basis for the design of wrist protection devices that can be used to prevent wrist injury induced by falling and the treatment of wrist injury in elderly people.