Objective: To analyze characteristics of hepatitis B infection in HBsAg-/HBV DNA+ blood donors in Taiyuan, so as to provide evidence for adjusting blood screening strategies. Methods: Blood samples of HBsAg-/HBV DNA+ donors were tested using enzyme-linked immunosorbent assay (ELISA), chemiluminescence assay, nucleic acid qualitative test, and nucleic acid quantitative test. Data on HBsAg-/HBV DNA+ donors in Taiyuan region from January 1, 2016 to December 31, 2024 were statistically analyzed to evaluate the detection rate, demographic characteristics, influencing factors of detection rate, nucleic acid quantitative results, and serological patterns of HBsAg-/HBV DNA+ donors. Results: From January 1, 2016 to December 31, 2024, 991 565 donor samples underwent nucleic acid testing in Taiyuan. A total of 309 HBsAg-/HBV DNA+ samples were detected, resulting in an HBsAg-/HBV DNA+ detection rate of 3.12 per 10 000. The detection rate varied significantly across different years (P<0.05). Males had a significantly higher HBsAg-/HBV DNA+ detection rate than females, first-time donors had a higher rate than repeat donors, and whole blood donors had a higher rate than apheresis donors (P<0.05). The detection rate also differed significantly among age groups (P<0.05). Logistic regression analysis showed that gender, age, donation frequency, and donation type were all influencing factors for HBsAg-/HBV DNA+ detection (all P<0.05). The predominant serological patterns among HBsAg-/HBV DNA+ donors were HBsAb+/HBcAb+ (43.69%, 135/309) or HBcAb+ alone (24.27%, 75/309). Viral load was detectable in 53.40% (165/309) of the HBsAg-/HBV DNA+ donors. Among these, 61.21% (101/165) donors had a viral load<20 IU/mL, and 94.55% (156/165) had a viral load<200 IU/mL. Donors with viral load<200 IU/mL primarily exhibited HBsAb+/HBcAb+ (41.67%, 65/156) or HBcAb+alone (36.54%, 57/156) serological patterns. Conclusion: The prevalence of HBsAg-/HBV DNA+ is low among blood donors in Taiyuan. Higher detection rates were observed in the 46-55 years age group, males, first-time donors, and whole blood donors. HBsAg-/HBV DNA+ donors exhibit specific serological patterns and generally have low viral loads, indicating a potential residual transfusion risk. It is recommended to add HBcAb testing, together with high-sensitivity nucleic acid testing technologies and donor follow-up, to ensure blood safety and guide donor reentry.

Lipids play an important role in the regulation of cell life processes.Although there are various lipid detection methods,Raman spectroscopy,a non-invasive technique,provides the detailed chemical composition of lipid profiles without a complex sample preparation procedure and possesses greater potential in basic biology,clinical diagnosis and disease therapy.In this review,we summarized the characteristics and advantages of Raman-based techniques and their primary contribution to illustrating cellular lipid metabolism.

Objective To investigate the mechanisms by which astaxanthin(AST)alleviates oxaliplatin(OXA)-induced neuropathic pain through antioxidant pathways so as to provide theoretical basis for clinical intervention.Methods Animal experiments:SD rats were divided into five groups(n=6):control group,OXA(4 mg/kg)group,OXA+Oil group,OXA+AST(5 mg/kg)group,and OXA+AST(10 mg/kg)group.Mechanical and cold pain thresholds were measured at day 0,7,14,and 21.Malondialdehyde(MDA)content and superoxide dismutase(SOD)activity in the dorsal root ganglia(DRG)were detected using the thiobarbituric acid(TBA)method and WST-1 assay,respectively.Western blotting was performed to analyze the expressions of Nrf2 and HO-1.Cell experiments:neuro-2a cells were divided into control group,OXA(50 μmol/L)group,AST(10 μmol/L)group,and OXA(50 μmol/L)+AST(10 μmol/L)group.Cells were treated with nerve growth factor(NGF,50 ng/mL)to induce growth,and morphological changes were observed under an inverted microscope.Intracellular reactive oxygen species(ROS)level and mitochondrial superoxide were measured using DCFH-DA fluorescent probe and MitoSOXTM red,respectively.Mitochondrial function was assessed by JC-1 assay.Western blotting was used to detect Nrf2 and HO-1 expressions.Results Animal experiments:① Mechanical and cold pain thresholds were reduced in OXA and OXA+Oil groups(P＜0.05),while AST significantly increased these thresholds in OXA-treated rats(P＜0.05).② SOD activity decreased while MDA content increased in the DRG of OXA-treated rats(P＜0.05).AST restored SOD activity and reduced MDA level(P＜0.05,P＜0.01).③ Western blotting showed elevated Nrf2 and HO-1 expressions in OXA group(P＞0.05),which were further upregulated by AST(P＜0.05,P＜0.01).Cell experiments:① OXA reduced the number of neurite-bearing cells and shortened the average neurite length(P＜0.05).Inverted microscopic observation revealed that AST intervention increased both parameters(P＜0.01,P＜0.001).② OXA increased intracellular and mitochondrial ROS fluorescence intensity(P＜0.05),which was attenuated by AST(P＜0.01).③ JC-1 assay revealed decreased mitochondrial membrane potential in OXA group(P＜0.01),which was partially reversed by AST(P＜0.05).④ Western blotting results showed that OXA upregulated Nrf2 and HO-1 expressions(P＜0.05,P＜0.01),and AST further enhanced their levels(P＜0.01).Conclusion AST alleviates OXA-induced neuropathic pain by promoting Nrf2/HO-1 expression,enhancing SOD activity,reducing lipid peroxidation and ROS production,and improving mitochondrial function.

Objective Hypothyroidism is a common clinical disease of systemic metabolic reduction,the incidence and detection rate increased year by year.Based on the clinical characteristics of hypothyroidism,the study constructed and improved animal models to provide reference for the study of hypothyroidism prevention and treatment.Methods By reviewing relevant domestic and foreign literatures,the modeling methods of hypothyroidism were summarized and analyzed.According to the etiology,pathogenesis and clinical diagnostic criteria of hypothyroidism in Chinese medicine and Western medicine,the modeling methods and principles of hypothyroidism animal models were summarized,and the advantages and disadvantages of animal models and the evaluation of clinical conformity were analyzed.Results It was found that the model of drug induction,iodine restriction and 131 I-induced hypothyroidism had high clinical anastomosis in Western medicine,and had the advantages of simple operation,high model formation rate and good repeatability,the combination of the disease model and the syndrome model of kidney yang deficiency and spleen and kidney yang deficiency have a high degree of clinical conformity in TCM.Congenital induced hypothyroidism,autoimmune induced hypothyroidism and genetic induced hypothyroidism can be studied for their unique etiology and pathogenesis,but their clinical manifestations are relatively simple and their clinical anastomosis is relatively low.At present,the construction of hypothyroidism animal model is mainly based on the pathogenesis of Western medicine,and the evaluation of the model mostly relies on laboratory detection indicators.The clinical anastomosis score of traditional Chinese medicine is generally low,and the record of animal apparent indicators is generally insufficient.Conclusion In the process of building hypothyroidism animal model,based on the pathogenesis of traditional Chinese medicine,combining the etiology of traditional Chinese medicine and the pathogenesis of Western medicine,multi-factor comprehensive modeling method can be adopted to increase the record of apparent indicators,improve the accuracy of the four diagnoses and symptoms of traditional Chinese medicine,and systematically and dynamically observe the interaction process of disease and syndrome,so as to build an animal model of hypothyroidism which is more closely aligns with with the clinical characteristics of traditional Chinese medicine and Western medicine.

Objective:To establish a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of N-desalkylquetiapine, hydroxybupropion, N-desmethyl clozapine, N-desmethyl clomipramine, O-desmethyvenlafaxine and dehydro aripiprazole in human plasma.Methods:In June 2023, plasma samples were treated with methanol-acetonitrile (volume ratio of 1∶1) for protein precipitation and then detected by LC-MS/MS. It was separated by C18 column and eluted with 5 mmol/L ammonium acetate water and 5 mmol/L ammonium acetate methanol solution as mobile phase gradient. The metabolites of six psychotropic drugs were qualitatively and quantitatively by using electrospray positive ion multi-reactive ion monitoring scanning mode (MRM) .Results:The linear relationships of six psychotropic drug metabolites were good in the concentration range of 2-100 μg/L. The linear correlation coefficients were 0.9971-0.9999, the limits of quantification of the method were 0.10-6.00 μg/L, and the inter-and intra-day precision were 4.6%-9.8% and 1.5%-8.6%, with the recoveries of the spiked standards ranged from 90.0% to 106.1%.Conclusion:The LC-MS/MS method for the determination of metabolites of six psychotropic drugs in human plasma is simple, rapid and sensitive, and can be used for the qualitative and quantitative determination of metabolites in plasma samples of patients suspected of psychotropic drug poisoning.

Objective To provide a reference basis for the establishment of ideal animal models of leukemia,the characteristics of animal models of leukemia was summarized.Methods The themes of"leukemia"and"animal"were searched in CNKI databases.The relevant literature on animal experiments of leukemia from January 2010 to August 2024 were screened.And a database by Excel 2017 tables was established by organizing their research animal strains,modeling methods and testing indexes to analyze the characteristics of leukemia animal models.Results After comparative analysis,it was found that the animal strains in modeling were BALB/C-nude mice(40 times,29.86%)and NOD/SCID mice(32 times,23.88%),respectively.The modeling method was transplanted cells(127 times,93.38%),and the detection indexes were pathological tissues(80 times,14.84%),blood smears(75 times.13.91%),general condition(73 times,13.54%),bone marrow smear(73 times,13.54%),flow cytometry(55 times,10.20%),blood routine(50 times,9.28%).Conclusion The existing animal models of leukemia are complex and diverse.

Background and purpose:Salivary duct carcinoma(SDC)is a group of rare and highly heterogeneous diseases.It predominantly arises in the parotid glands of middle-aged and elderly males,with high rates of recurrence and metastasis,as well as a poor prognosis.Currently,there is a lack of clinical data on SDC.This study aimed to evaluate the clinical characteristics of SDC patients and explore high-risk factors affecting prognosis,so as to provide clinical references for physicians.Methods:Clinical data of patients with primary SDC who were admitted to Tianjin Medical University Cancer Institute and Hospital and Tianjin Stomatological Hospital Affiliated to Nankai University School of Medicine from 2012 to 2024,were collected retrospectively.Inclusion criteria:① patients diagnosed with primary SDC;② availability of American Joint Committee on Cancer(AJCC)staging data.Exclusion criteria:① concurrent other malignant tumors;② incomplete or missing medical records;③ death due to non-SDC causes;④ duplicate cases from the two participating hospitals.Data retrieved encompassed epidemiological information(gender,age)and clinical details(time of diagnosis,tumor characteristics,treatment regimen,recurrence and metastasis status,and pathological data).Survival analysis was performed using the Kaplan-Meier method,and factors related to prognosis were explored through univariate COX proportional hazards regression model analysis.This study was approved by the Ethics Committee of Tianjin Stomatological Hospital Affiliated to Nankai University School of Medicine(ethics number:PH2023-B-016),and patient informed consent was waived.Results:A total of 87 patients with primary SDC were included in this study,among whom 77%were male,69%had primary lesions in the parotid gland,29.9%in the submandibular gland,and one patient had a primary lesion in the minor salivary gland of the nasal cavity.49.3%of the patients had concurrent cervical lymph node metastasis.The median overall survival(OS)of the entire group was 31.2 months,the median progression-free survival(PFS)was 20.3 months,and the 5-year OS rate was 52.6%.The 5-year OS rate for tumors originating from the parotid gland was 60%,which was better than the 32.9%for those originating from the submandibular gland.Among the 85 patients who received surgical treatment,65.9%underwent both resection of the primary tumor and neck dissection.Postoperative radiotherapy was administered to 49 patients.During the follow-up period,46%of the patients developed recurrence or metastasis,with lung and bone metastases being the most common.The median OS and local progression-free time in the postoperative radiotherapy group were significantly longer compared with those in the group without radiotherapy,however,the difference was not statistically significant.Conclusion:SDC is a malignant and aggressive disease that predominantly occurs in the parotid glands of middle-aged and elderly males,with a high rate of lymph node metastasis and poor prognosis.Clinically,it is recommended that patients with SDC undergo radical resection of the primary lesion and cervical lymph node dissection,combined with postoperative adjuvant radiotherapy.Targeted therapy and immunotherapy are worthy of further exploration.

Background and purpose:Salivary duct carcinoma(SDC)is a group of rare and highly heterogeneous diseases.It predominantly arises in the parotid glands of middle-aged and elderly males,with high rates of recurrence and metastasis,as well as a poor prognosis.Currently,there is a lack of clinical data on SDC.This study aimed to evaluate the clinical characteristics of SDC patients and explore high-risk factors affecting prognosis,so as to provide clinical references for physicians.Methods:Clinical data of patients with primary SDC who were admitted to Tianjin Medical University Cancer Institute and Hospital and Tianjin Stomatological Hospital Affiliated to Nankai University School of Medicine from 2012 to 2024,were collected retrospectively.Inclusion criteria:① patients diagnosed with primary SDC;② availability of American Joint Committee on Cancer(AJCC)staging data.Exclusion criteria:① concurrent other malignant tumors;② incomplete or missing medical records;③ death due to non-SDC causes;④ duplicate cases from the two participating hospitals.Data retrieved encompassed epidemiological information(gender,age)and clinical details(time of diagnosis,tumor characteristics,treatment regimen,recurrence and metastasis status,and pathological data).Survival analysis was performed using the Kaplan-Meier method,and factors related to prognosis were explored through univariate COX proportional hazards regression model analysis.This study was approved by the Ethics Committee of Tianjin Stomatological Hospital Affiliated to Nankai University School of Medicine(ethics number:PH2023-B-016),and patient informed consent was waived.Results:A total of 87 patients with primary SDC were included in this study,among whom 77%were male,69%had primary lesions in the parotid gland,29.9%in the submandibular gland,and one patient had a primary lesion in the minor salivary gland of the nasal cavity.49.3%of the patients had concurrent cervical lymph node metastasis.The median overall survival(OS)of the entire group was 31.2 months,the median progression-free survival(PFS)was 20.3 months,and the 5-year OS rate was 52.6%.The 5-year OS rate for tumors originating from the parotid gland was 60%,which was better than the 32.9%for those originating from the submandibular gland.Among the 85 patients who received surgical treatment,65.9%underwent both resection of the primary tumor and neck dissection.Postoperative radiotherapy was administered to 49 patients.During the follow-up period,46%of the patients developed recurrence or metastasis,with lung and bone metastases being the most common.The median OS and local progression-free time in the postoperative radiotherapy group were significantly longer compared with those in the group without radiotherapy,however,the difference was not statistically significant.Conclusion:SDC is a malignant and aggressive disease that predominantly occurs in the parotid glands of middle-aged and elderly males,with a high rate of lymph node metastasis and poor prognosis.Clinically,it is recommended that patients with SDC undergo radical resection of the primary lesion and cervical lymph node dissection,combined with postoperative adjuvant radiotherapy.Targeted therapy and immunotherapy are worthy of further exploration.

The major histocompatibility complex plays a crucial role in the immune response process, which is closely related to the occurrence and development of tumors and organ transplantation. Cellular immunity occupies an important position in tumor immunity and organ transplantation immunity, while humoral immunity also plays a significant role in organ transplantation immunity. Organ transplantation requires the induction and maintenance of immune tolerance, while tumors develop immune escape phenomena during their progression. In-depth exploration and comparison of the mechanisms of tumor immune escape and organ transplantation immune tolerance are of great significance for formulating reasonable immune tolerance induction strategies, improving the quality of life and prolonging the survival time of organ transplant patients.

Objective:To investigate the efficacy of fibrosis-4 index (FIB-4), NAFLD fibrosis score (NFS), aspartate aminotransferase to platelet count ratio (APRI), liver stiffness value (LSM), and Agile 3+ score and their combined model in predicting advanced-stage liver fibrosis in patients with chronic hepatitis B (CHB) combined with metabolic-associated fatty liver disease (MAFLD).Methods:A multicenter retrospective cohort study was conducted on the BMOVE population.Nine hundred twenty CHB cases combined with MAFLD who underwent liver biopsy at seven medical centers in China from April 2006 to December 2023 were included. The patients were divided into advanced-stage liver fibrosis (159 cases) and non-advanced-stage liver fibrosis (761 cases) according to the Scheuer's scoring system.The area under the receiver operating characteristic curve (AUROC), decision curve, and calibration curve analysis were used to evaluate the efficacy of the firbrosis-4 index (FIB-4) score, NFS score, APRI index, LSM, and Agile 3+ score and their combined model in predicting advanced-stage fibrosis. The liver fibrosis grade of all patients was diagnosed by liver biopsy. The sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of each scoring model and combined model, as well as the proportion of correctly classified patients, were calculated based on different cutoff values.Results:AUROC analysis showed that Agile 3+ (0.814, 95% CI: 0.787-0.838) and LSM (0.805, 95% CI: 0.778-0.829) had similar accuracy and were superior to FIB-4 (0.721, 95% CI: 0.691-0.749), NFS (0.687, 95% CI: 0.656-0.716) and APRI ( 0.689, 95% CI: 0.658-0.718); however, HBV DNA level and HBV e antigen status had no effect on this outcome. Decision curve analysis showed that interventions based on LSM and Agile 3+ had provided higher net benefits compared with serological scores. Calibration curves showed that Agile 3+ had better predicitive accuracy than all other models. Agile 3+ had the highest PPV (0.54), minimal uncertainty interval (11.6%), and the highest proportion of correctly classified patients (76%); followed by LSM (PPV: 0.43, uncertainty interval: 15.5%, correct classification rate: 66%), and FIB-4 (PPV: 0.42, uncertainty interval: 26.1%, correct classification rate: 62.6%) in terms of identifying advanced-stage liver fibrosis. Combined model analysis demonstrated that FIB-4 combined with Agile 3+ had improved the correct classification rate and reduced the proportion of missed patients compared with FIB-4 combined with LSM. Conclusion:The Agile 3+ score is superior than LSM, FIB-4, NFS, and APRI index at identifying advanced-stage fibrosis in patients with CHB combined with MAFLD. This study supports the use of FIB-4 index combined with Agile 3+ for risk stratification in patients with CHB combined with MAFLD.