Objective To explore the clinical diagnostic value of high-frequency ultrasound and color Doppler ultrasound in detecting vibration-induced nerve and vascular injuries in patients with occupational hand-arm vibration disease (HAVD). Methods A total of 32 patients with mild occupational HAVD were enrolled as the case group, and 32 healthy volunteers were selected as the control group by the purposive sampling method. High-frequency ultrasound was used to observe the location, morphology, course and echogenic characteristics of the median nerve of the participants in both groups. The cross-sectional area (CSA) of the median nerve at the carpal tunnel inlet was measured. Color Doppler ultrasound was applied to observe the course of the proper palmar digital artery of the index finger, and hemodynamic parameters including peak systolic velocity (PSV), end-diastolic velocity (EDV) and resistive index (RI) were evaluated. Results In the case group, the transverse section of the median nerve among participants appeared flattened, the "honeycomb-like" structure was mildly blurred, epineurial echogenicity was slightly increased, and the margins of hyperechoic fascicles on longitudinal sections were indistinct. The CSA of the median nerve at the pisiform level and the palmar digital RI of the index finger were increased among the participants in the case group compared with the control group (both P<0.01), while PSV and EDV of the proper palmar digital artery of the index finger were decreased (both P<0.01). Conclusion High-frequency ultrasound and color Doppler ultrasound can detect morphological changes in the median nerve and hemodynamic alterations in finger vessels among patients with mild occupational HAVD, objectively reflecting neurovascular injury caused by hand-transmitted vibration and providing scientific and objective imaging evidence for the clinical diagnosis of occupational HAVD.

Objective To explore the T/NK cell-related differentially expressed genes(T/NK-DEGs)related to the prognosis of liver cancer based on the single-cell RNA-seq data,gene expression data and clinical information in the GEO and TCGA databases,and construct the prognostic model of liver cancer.Methods The single-cell RNA-seq data and gene expression matrices of liver cancer were obtained from the GEO database.The TCGA-LIHC cohorts,including mRNA expression data,clinical information,survival infor-mation,and somatic mutation data,were obtained from the TCGA database.Based on the two databases,the prognostic model of liver cancer patients was constructed by the bioinformatics method,and the performance of the model was predicted.Results Two T/NK-DEGs,PTTG1 and UBE2C,were identified to be associated with the prognosis of liver cancer and a prognostic model of liver cancer was constructed based on them.According to the risk score,the patients were divided into the high-risk score group and low-risk score group,in which the patients with high-risk score had a worse prognosis than those with low-risk score.The areas under the receiv-er operating characteristics(ROC)curve(AUCROC)of the prognostic model at 1-year,3-year and 5-year time points were 0.685,0.647 and 0.594,respectively.The higher risk score was correlated with the advanced pathological stage(Ⅰstage,Ⅱstage,andⅢstage)and T-stage(T1,T2,and T3)(P＜0.05).The prognostic model was able to predict the proportion of tumor infiltrating immune cells,and the sensitivity of immunotherapy and chemotherapy drugs in patients with liver cancer.Conclusion The constructed prog-nostic model in this study has an important role in the prediction of individualized survival and clinical treatment response of patients with liver cancer.

Objective To explore the clinical significance and to investigate the expression of TOMM40L in the tis-sue of triple-negative breast cancer(TNBC).Methods The expression of TOMM40L in TNBC tissues and normal tissues was analyzed with TCGA and UALCAN databases.Univariate and multivariate Cox regression analysis and Nomogram model were used to evaluate the prognostic value of TOMM40L in TNBC patients.Furthermore,the ex-pression of TOMM40L in breast cancer cell lines was evaluated using Western blot analysis and quantitative real-time PCR.Specific siRNA knockdown was performed to evaluate the migration,and cell proliferation of TOMM40L.The potential signaling pathways of TOMM40L were identified by GO and KEGG and GSEA.Results TOMM40L was highly expressed in the TNBC compared to non-TNBC tumor tissues(P＜0.001).TOMM40L levels were en-hanced in TNBC cell lines as compared to other non-TNBC cell lines.CCK-8 and Transwell assay demonstrated that TOMM40L knockdown reduced the proliferation and migration of TNBCcell lines.Functional enrichment analysis showed that TOMM40L was involved in glucose metabolism-related pathways.Conclusions The expression of TOMM40L is increased in TNBC and is correlated with poor prognosis.TOMM40L may promote TNBC migration and proliferation.

This study aims to screen epitope antigens targeting the receptor binding domain(RBD)of porcine epidemic diarrhea virus(PEDV)based on its amino acid sequence(GenBank accession number:AKN45969.1),prepare PEDV RBD polyclonal antibody,and perform their identification.Bioinformatics analysis software was used to predict the potential antigenic epitopes of PEDV RBD and sequence comparison with porcine coronavirus strains was performed,the selected dominant antigen epitopes were then conjugated with keyhole limpet hemocyanin(KLH),to synthesize pep-tides directly and immunize mice to generate specific antibody,Western blot technique and indirect immunofluorescence assay were utilized to identify the specificity of the antibodies,and indirect ELISA method was further applied to determine the antibody potency.Results showed the selected PEDV RBD dominant epitope sequence shared 100％similarity with 18 other PEDV strains,while exhibiting low sequence similarity with 11 TGEV strains(27.8％—29.3％)and 16 PDCoV strains(10.5％—13.4％),indicating good epitope conservation.Western blot showed that the specificity of the prepared peptide antibody specifically recognized the PEDV RED protein overexpressed in Ex-pi293F cells and overexpressed in baculovirus system,and at the same time,the antibody was still able to detect the PEDV S protein expressed in PEDV-infected Vero cells at a 1∶2 000 dilution,while it did not react with TGEV-and PDCoV-infected ST cells,indicating that the good specificity of the peptide antibody.ELISA revealed that the potency of specific antibodies in mouse serum could reach up to 1∶25 600.The above results indicate that bioinformatics techniques were suc-cessfully utilized to predict antigenic epitopes of PEDV RBD protein,and specific PEDV RBD pep-tide antibodies were prepared.

This study aims to screen epitope antigens targeting the receptor binding domain(RBD)of porcine epidemic diarrhea virus(PEDV)based on its amino acid sequence(GenBank accession number:AKN45969.1),prepare PEDV RBD polyclonal antibody,and perform their identification.Bioinformatics analysis software was used to predict the potential antigenic epitopes of PEDV RBD and sequence comparison with porcine coronavirus strains was performed,the selected dominant antigen epitopes were then conjugated with keyhole limpet hemocyanin(KLH),to synthesize pep-tides directly and immunize mice to generate specific antibody,Western blot technique and indirect immunofluorescence assay were utilized to identify the specificity of the antibodies,and indirect ELISA method was further applied to determine the antibody potency.Results showed the selected PEDV RBD dominant epitope sequence shared 100％similarity with 18 other PEDV strains,while exhibiting low sequence similarity with 11 TGEV strains(27.8％—29.3％)and 16 PDCoV strains(10.5％—13.4％),indicating good epitope conservation.Western blot showed that the specificity of the prepared peptide antibody specifically recognized the PEDV RED protein overexpressed in Ex-pi293F cells and overexpressed in baculovirus system,and at the same time,the antibody was still able to detect the PEDV S protein expressed in PEDV-infected Vero cells at a 1∶2 000 dilution,while it did not react with TGEV-and PDCoV-infected ST cells,indicating that the good specificity of the peptide antibody.ELISA revealed that the potency of specific antibodies in mouse serum could reach up to 1∶25 600.The above results indicate that bioinformatics techniques were suc-cessfully utilized to predict antigenic epitopes of PEDV RBD protein,and specific PEDV RBD pep-tide antibodies were prepared.

Objective To explore the T/NK cell-related differentially expressed genes(T/NK-DEGs)related to the prognosis of liver cancer based on the single-cell RNA-seq data,gene expression data and clinical information in the GEO and TCGA databases,and construct the prognostic model of liver cancer.Methods The single-cell RNA-seq data and gene expression matrices of liver cancer were obtained from the GEO database.The TCGA-LIHC cohorts,including mRNA expression data,clinical information,survival infor-mation,and somatic mutation data,were obtained from the TCGA database.Based on the two databases,the prognostic model of liver cancer patients was constructed by the bioinformatics method,and the performance of the model was predicted.Results Two T/NK-DEGs,PTTG1 and UBE2C,were identified to be associated with the prognosis of liver cancer and a prognostic model of liver cancer was constructed based on them.According to the risk score,the patients were divided into the high-risk score group and low-risk score group,in which the patients with high-risk score had a worse prognosis than those with low-risk score.The areas under the receiv-er operating characteristics(ROC)curve(AUCROC)of the prognostic model at 1-year,3-year and 5-year time points were 0.685,0.647 and 0.594,respectively.The higher risk score was correlated with the advanced pathological stage(Ⅰstage,Ⅱstage,andⅢstage)and T-stage(T1,T2,and T3)(P＜0.05).The prognostic model was able to predict the proportion of tumor infiltrating immune cells,and the sensitivity of immunotherapy and chemotherapy drugs in patients with liver cancer.Conclusion The constructed prog-nostic model in this study has an important role in the prediction of individualized survival and clinical treatment response of patients with liver cancer.

Objectives:To observe the mitochondrial morphology of normal and triple-negative breast cancer cells, extract mitochondria from normal cells, and investigate the effects of mitochondrial transplantation on proliferation, apoptosis, and stemness of triple-negative breast cancer cells.Methods:The morphology of mitochondria was observed by transmission electron microscope. Mitochondria were extracted by mitochondrial extraction kit, mitochondrial protein was identified by western blot, and mitochondrial activity was detected by mitochondrial membrane potential detection kit. MitoTracker Green or MitoTracker Deep Red fluorescent probes were used to label the mitochondria of living cells, and the degree of mitochondria entering LTT cells was observed by confocal laser microscopy at 12, 24, and 96 hours. The effects of mitochondrial transplantation on proliferation, apoptosis, and stemness of breast cancer cells were examined by CCK8, colony formation assay, flow cytometry, and sphere formation assay after 24 hours of mitochondrial transplantation.Results:The mitochondria of normal cells were rod-shaped or elongated, while the mitochondria of triple-negative breast cancer cells were swollen and vacuolated. Western blot results showed that cytochrome c oxidase subunit I (MT-CO1) protein encoded by mitochondria was present in the isolated mitochondria. The content of heat shock protein 60 (HSP60) was higher in mitochondria than that in cytoplasm. The result of the multi-mode microplate reader showed that the content of mitochondrial J-aggregates/monomer was 1.67±0.06, which was significantly higher than 0.35±0.04 of the control group ( P＜0.001). Exogenous mitochondria were observed in LTT cells at 12, 24, and 96 hours after mitochondrial transplantation. The results of the CCK8 experiment showed that OD450 of LTT cells was 0.27±0.13 after 48 hours transplantation, which was lower than 0.62±0.36 of the control group ( P=0.023). The OD450 of MDA-MB-468 cells was 0.30±0.03, which was lower than 0.65±0.10 of the control group ( P=0.004). After 120 hours of mitochondrial transplantation, OD450 in both groups was still significantly lower than that in the control group (P＜0.01). The number of clones formed by mitochondrial transplantation of LTT cells was 21.33±7.31, which was lower than 35.22±13.59 of the control group ( P=0.016). Flow cytometry showed that the early apoptosis rate of LTT cells was (30.07±2.15)% after 24 hours of mitochondrial transplantation, which was higher than 2.07±1.58 of the control group ( P＜0.001). The proportion of early apoptosis in MDA-MB-468 cells was 24.47%±5.22%, which was higher than (7.83±2.06)% in the control group ( P=0.007). In addition, the number of mitochondria transplanted LTT cells into the cell sphere was 46.25±5.40, which was significantly lower than 62.58±6.43 of the control group ( P＜0.001). Conclusion:Normal mitochondria can enter triple-negative breast cancer cells by co-culture, inhibit the proliferation and stemness of triple-negative breast cancer cells, and promote the apoptosis of triple-negative breast cancer cells.

BACKGROUND:Red light irradiation and silver ion dressing are mostly used to treat chronic difficult healing wounds clinically,but the optimal irradiation time of red light irradiation and silver ion dressing for chronic non-healing wounds,and the combination of different silver ion dressings have not been determined. OBJECTIVE:To investigate the optimal irradiation time and dressing combination of red light and silver ion dressing in the therapy of chronic non-healing wounds. METHODS:The chronic non-healing wound model was made by applying Staphylococcus aureus on the whole skin defect and subcutaneous hydrocortisone injection in SD rats.72 rat models were randomly divided into 4 groups with 18 rats in each group by random number table method.The rats were treated on the basis of standard dressing change and the following therapy:A1B1 group(red irradiation 20 minutes + lipid hydrocolloidal silver sulfate dressing),A1B2 group(red light irradiation 20 minutes + calcium alginate fiber dressing),A2B1 group(red light irradiation 30 minutes + lipid hydrocolloidal silver sulfate dressing),and A2B2 group(red light irradiation 30 minutes + calcium alginate fiber dressing);change dressing,irradiate once,and change dressing every 24 hours.After 14 days of continuous treatment,wound healing rate,bacterial colony number,inflammatory response,histomorphology and angiogenesis were detected in each group. RESULTS AND CONCLUSION:(1)With the extension of treatment time,the wound healing rate of rats in the four groups was increased,and the wound healing rate of rats in the A2B2 group at 3,7,and 14 days after treatment was higher than that in the other three groups(P<0.05).(2)The wound bacterial culture results on day 7 after treatment demonstrated that the number of bacterial colonies in the A2B2 group was lower than that in the other three groups(P<0.05).Western blot assay exhibited that with the extension of treatment time,the protein expressions of tumor necrosis factor α and interleukin-6 in wound tissue of rats in the four groups were decreased,while the protein expressions of interleukin-10 were increased.The protein expressions of tumor necrosis factor α and interleukin-6 in the A2B2 group were lower than those in the other three groups(P<0.05).The protein expression of interleukin-10 in the A2B2 group was higher than that of the other three groups(P<0.05).(3)The wound hematoxylin-eosin staining on day 14 after treatment demonstrated that a large number of collagen fibers in the A2B2 group were parallel distributed and the most closely connected,which was significantly better than the other three groups.(4)The results of immunofluorescence staining indicated that the fluorescence intensity expression of CD31 in the A2B2 group was higher than that in the A1B1,A1B2 and A2B1 groups(P<0.05).q-PCR detection at 3,7,and 14 days after treatment exhibited that the mRNA expressions of vascular endothelial growth factor a and vascular endothelial growth factor receptor 2 in the A2B2 group were higher than those in the other three groups(P<0.05).Western blot assay at 3,7 and 14 days after treatment revealed that the protein expressions of vascular endothelial growth factor a and vascular endothelial growth factor receptor 2 in the A2B2 group were higher than those in the other three groups(P<0.05).(5)These findings confirm that 30 minutes of red light irradiation combined with silver alginate fiber dressing has better results in treatment of chronic non-healing wounds.

Objectives:To observe the mitochondrial morphology of normal and triple-negative breast cancer cells, extract mitochondria from normal cells, and investigate the effects of mitochondrial transplantation on proliferation, apoptosis, and stemness of triple-negative breast cancer cells.Methods:The morphology of mitochondria was observed by transmission electron microscope. Mitochondria were extracted by mitochondrial extraction kit, mitochondrial protein was identified by western blot, and mitochondrial activity was detected by mitochondrial membrane potential detection kit. MitoTracker Green or MitoTracker Deep Red fluorescent probes were used to label the mitochondria of living cells, and the degree of mitochondria entering LTT cells was observed by confocal laser microscopy at 12, 24, and 96 hours. The effects of mitochondrial transplantation on proliferation, apoptosis, and stemness of breast cancer cells were examined by CCK8, colony formation assay, flow cytometry, and sphere formation assay after 24 hours of mitochondrial transplantation.Results:The mitochondria of normal cells were rod-shaped or elongated, while the mitochondria of triple-negative breast cancer cells were swollen and vacuolated. Western blot results showed that cytochrome c oxidase subunit I (MT-CO1) protein encoded by mitochondria was present in the isolated mitochondria. The content of heat shock protein 60 (HSP60) was higher in mitochondria than that in cytoplasm. The result of the multi-mode microplate reader showed that the content of mitochondrial J-aggregates/monomer was 1.67±0.06, which was significantly higher than 0.35±0.04 of the control group ( P＜0.001). Exogenous mitochondria were observed in LTT cells at 12, 24, and 96 hours after mitochondrial transplantation. The results of the CCK8 experiment showed that OD450 of LTT cells was 0.27±0.13 after 48 hours transplantation, which was lower than 0.62±0.36 of the control group ( P=0.023). The OD450 of MDA-MB-468 cells was 0.30±0.03, which was lower than 0.65±0.10 of the control group ( P=0.004). After 120 hours of mitochondrial transplantation, OD450 in both groups was still significantly lower than that in the control group (P＜0.01). The number of clones formed by mitochondrial transplantation of LTT cells was 21.33±7.31, which was lower than 35.22±13.59 of the control group ( P=0.016). Flow cytometry showed that the early apoptosis rate of LTT cells was (30.07±2.15)% after 24 hours of mitochondrial transplantation, which was higher than 2.07±1.58 of the control group ( P＜0.001). The proportion of early apoptosis in MDA-MB-468 cells was 24.47%±5.22%, which was higher than (7.83±2.06)% in the control group ( P=0.007). In addition, the number of mitochondria transplanted LTT cells into the cell sphere was 46.25±5.40, which was significantly lower than 62.58±6.43 of the control group ( P＜0.001). Conclusion:Normal mitochondria can enter triple-negative breast cancer cells by co-culture, inhibit the proliferation and stemness of triple-negative breast cancer cells, and promote the apoptosis of triple-negative breast cancer cells.

Objective:To investigate the clinical efficacy of non-drug interventions in hospice and palliative care(HPC)for improving cancer-related fatigue(CRF)in elderly individuals and its impact on quality of life.Methods:This study presents findings from a single-center randomized controlled trial conducted at Zhejiang Hospital, focusing on 40 elderly patients experiencing cancer-related fatigue(CRF)between February 2022 and February 2023.The participants were randomly assigned into a control group and an intervention group, each consisting of 20 individuals, using the random number table method.Both groups received routine comprehensive treatment, with the intervention group additionally receiving hospice and palliative care(HPC)non-drug intervention.Following 6 weeks of continuous treatment, the study compared the clinical efficacy, changes in CRF, and quality of life before and after treatment between the two groups.Results:Comparing the baseline data of the two groups of patients, the difference was not statistically significant(all P>0.05).After 6 weeks of treatment, patients in the intervention group reported lower levels of current fatigue, general fatigue, worst fatigue in the past 24 hours, and impact of fatigue on various aspects of their lives compared to the control group(all P<0.01).The clinical remission rate of cancer-related fatigue(CRF)in the intervention group was 60%, significantly higher than the 5% in the control group( P<0.01).Additionally, the intervention group showed improvement in overall quality of life and emotional function with decreased symptom areas scores(fatigue, nausea and vomiting, shortness of breath, sleep disorders, and loss of appetite)( P<0.01 for quality of life and emotional function, P<0.05 for symptom areas). Conclusions:Non-pharmacological interventions within the context of hospice and palliative care have been shown to alleviate cancer-related fatigue in elderly cancer patients, ultimately improving their quality of life.These interventions have demonstrated positive effects on various aspects such as overall quality of life, functional status, fatigue, nausea and vomiting, shortness of breath, sleep disorders, and decreased appetite.Furthermore, these interventions are considered safe and effective in the treatment of elderly cancer patients experiencing fatigue.