Under the background of forensic medicine becoming a first-level discipline,the opportuni-ties and challenges of discipline development coexist.Starting from the actual situation and characteris-tics of local medical colleges and universities,this paper discusses the problems and solutions for the development of forensic medicine discipline from the perspective of building a regional high-level medical university.Combined with the experiences of carrying out forensic medicine education in our college,this paper supplies our thoughts and practices on improving the discipline system,enhancing the ability to serve society,perfecting the talent cultivation model and promoting forensic culture,to provide reference and inspiration for the development of forensic medicine in other universities,jointly promote the advancement of forensic medicine in China to a new stage,and contribute the wisdom and strength of forensic medical experts to the construction of a law-based China,a safe China and a healthy China.

Objective:To analyze the imaging features of testicular conventional ultrasonography（US），shear wave elastography（SWE），and contrast-enhanced ultrasonography（CEUS）in subtypes of spermatogenic dysfunction（focal，arrest，and exhausted），and to evaluate the diagnostic efficacy of testicular multimodal ultrasound.Methods:A prospective study enrolled 310 spermatogenic dysfunction patients（focal type group： n=77，arrest type group： n=20，exhaustive type group： n=213）and 30 healthy volunteers（control group）at Shanghai General Hospital between October 2023 and December 2024. All patients underwent preoperative testicular US，SWE，and CEUS examinations，followed by microdissection testicular sperm extraction. Ultrasound parameters were compared among groups，and receiver operating characteristic（ROC）curves were plotted to assess the diagnostic efficacy of multimodal ultrasound for different subtypes. Results:①Testicular volume：The arrest group exhibited significantly greater volume compared to the focal group and the exhausted group（all P<0.05）. No statistically significant difference was observed between the arrest group and the normal group（ P>0.05）. ②Mean Young's modulus（Emean）：The arrest group exhibited significantly lower Emean compared with both the focal and exhausted groups（all P<0.05），but showed no significant difference versus the normal group（ P>0.05）. ③CEUS quantitative parameters：The arrival time（AT）and time to peak（TTP）in the exhausted group were higher than those in the normal group，while the peak intensity（PI）and area under the time-intensity curve（AUC）were lower（all P<0.05）. No significant differences were found in AT，TTP，or AUC among the three spermatogenic dysfunction subgroups（all P>0.05）. ④CEUS perfusion patterns：The focal group predominantly exhibited a mottled pattern（70.13%，54/77）. Both the arrest group（90.00%，18/20）and the normal group（93.33%，28/30）predominantly exhibited an rich pattern. The exhausted group predominantly exhibited a sparse pattern（56.34%，120/213）. ⑤ROC curve analysis showed that for differentiating the arrest group from the focal type group and the exhaustive type group，the combination of Emean，testicular volume，and CEUS perfusion pattern yielded an AUC of 0.931，with a sensitivity of 95.00% and specificity of 85.86%. For differentiating the focal type group from the exhaustive type group，the combination of testicular echogenicity，CEUS perfusion pattern，and Emean yielded an AUC of 0.833，with a sensitivity of 81.82% and specificity of 75.12%. Conclusions:Multimodal ultrasonography can comprehensively characterize the imaging features of different subtypes of spermatogenic dysfunction，holding promise as a noninvasive predictive tool.

Objective:To investigate the causal effects of plasma lipidomics on pancreatitis using Mendelian ran-domization(MR)and evaluate the roles of intra-pancreatic fat deposition(IPFD)and gallstone disease in this relation-ship.Methods:A bidirectional MR analysis was conducted,with 179 plasma lipids as exposures and acute pancreati-tis(AP)and chronic pancreatitis(CP)as outcomes.Data were sourced from genome-wide association studies(GWAS),the UK Biobank,and the FinnGen project.Two-step Mendelian randomization(TSMR)and multivariable Mendelian ran-domization(MVMR)analyses were applied to assess the mediating roles of IPFD and gallstone disease in the associa-tion between plasma lipids and pancreatitis.Results:MR analysis identified two sterols negatively associated with AP(P＜0.05)and seven sterols negatively associated with CP(P＜0.05).One phospholipid showed a positive association with CP(P＜0.05).IPFD was positively associated with both AP and CP.Gallstone disease was confirmed as a risk fac-tor for AP.However,TSMR analysis indicated that neither IPFD nor gallstone disease mediated the relationship be-tween plasma lipids and pancreatitis.Conclusion:The causal relationship exists among plasma lipomics and AP/CP,also between IPFD,cholelithiasis and pancreatitis.These findings highlight novel risk factors and potential biomarkers to support early diagnosis and intervention for pancreatitis.

Accurate timing of myelination is crucial for the proper functioning of the central nervous system. Here, we identified a de novo heterozygous mutation in TMEM63A (c.1894G>A; p. Ala632Thr) in a 7-year-old boy exhibiting hypomyelination. A Ca²⁺ influx assay suggested that this is a loss-of-function mutation. To explore how TMEM63A deficiency causes hypomyelination, we generated Tmem63a knockout mice. Genetic deletion of TMEM63A resulted in hypomyelination at postnatal day 14 (P14) arising from impaired differentiation of oligodendrocyte precursor cells (OPCs). Notably, the myelin dysplasia was transient, returning to normal levels by P28. Primary cultures of Tmem63a^-/- OPCs presented delayed differentiation. Lentivirus-based expression of TMEM63A but not TMEM63A_A632T rescued the differentiation of Tmem63a^-/- OPCs in vitro and myelination in Tmem63a^-/- mice. These data thus support the conclusion that the mutation in TMEM63A is the pathogenesis of the hypomyelination in the patient. Our study further demonstrated that TMEM63A-mediated Ca²⁺ influx plays critical roles in the early development of myelin and oligodendrocyte differentiation.
Animals ; Cell Differentiation/physiology* ; Oligodendroglia/metabolism* ; Mice, Knockout ; Mice ; Male ; Myelin Sheath/metabolism* ; Humans ; Child ; Cells, Cultured ; Oligodendrocyte Precursor Cells/metabolism*

This study investigates the effect of glycyrrhetinic acid(GA) combined with doxorubicin(DOX) on apoptosis in HepG2 cells and its possible mechanisms. HepG2 cells were cultured in vitro, and cell viability was assessed using the cell counting kit-8(CCK-8) method. Flow cytometry was used to measure apoptosis levels in HepG2 cells. The cells were divided into the following groups: control group(0 μmol·L~(-1)), DOX group(2 μmol·L~(-1)), GA group(150 μmol·L~(-1)), and DOX + GA combination group(2 μmol·L~(-1) DOX + 150 μmol·L~(-1) GA), with treatments given for 24 hours. The colocalization level between the endoplasmic reticulum(ER) and mitochondria was assessed by colocalization fluorescence imaging. Fluorescence probes were used to measure the Ca~(2+) content in the ER and mitochondria. The qRT-PCR and Western blot were used to determine the mRNA and protein expression of sirtuin-3(SIRT3). Co-immunoprecipitation(CO-IP) was applied to investigate the interactions between voltage-dependent anion channel 1(VDAC1) and SIRT3, as well as between VDAC1, glucose-regulated protein 75(GRP75), and inositol 1,4,5-trisphosphate receptor(IP3R). The results showed that the combination of DOX and GA promoted apoptosis in HepG2 liver cancer cells. The colocalization level between the ER and mitochondria was significantly reduced, the Ca~(2+) content in the ER was significantly increased, and the Ca~(2+) content in the mitochondria was significantly decreased. The relative expression of VDAC1, GRP75, and IP3R was significantly reduced, and interactions between VDAC1, GRP75, and IP3R were observed. SIRT3 mRNA and protein expression levels were significantly increased, and an interaction between SIRT3 and VDAC1 was detected. The acetylation level of VDAC1 was significantly decreased. In conclusion, GA combined with DOX induces apoptosis in HepG2 cells by mediating the deacetylation of VDAC1 through SIRT3, weakening the interactions among VDAC1, GRP75, and IP3R. This regulates the formation of endoplasmic reticulum-mitochondrial membrane domains(ERMMDs), affects Ca~(2+) transport between the ER and mitochondria, and ultimately triggers cell apoptosis.
Humans ; Apoptosis/drug effects* ; Hep G2 Cells ; Glycyrrhetinic Acid/pharmacology* ; Doxorubicin/pharmacology* ; Liver Neoplasms/genetics* ; Carcinoma, Hepatocellular/physiopathology* ; Mitochondria/metabolism* ; Endoplasmic Reticulum/metabolism* ; Cell Survival/drug effects* ; Membrane Proteins/genetics*

PURPOSE: To investigate the incidence and influencing factors of bone loss in patients with spinal cord injury (SCI). METHODS: A retrospective case-control study was conducted. Patients with SCI in our hospital from January 2019 to March 2023 were collected. According to the correlation between bone mineral density (BMD) at different sites, the patients were divided into the lumbar spine group and the hip joint group. According to the BMD value, the patients were divided into the normal bone mass group (t > -1.0 standard deviation) and the osteopenia group (t ≤ -1.0 standard deviation). The influencing factors accumulated as follows: gender, age, height, weight, cause of injury, injury segment, injury degree, time after injury, start time of rehabilitation, motor score, sensory score, spasticity, serum value of alkaline phosphatase, calcium, and phosphorus. The trend chart was drawn and the influencing factors were analyzed. SPSS 26.0 was used for statistical analysis. Correlation analysis was used to test the correlation between the BMD values of the lumbar spine and bilateral hips. Binary logistic regression analysis was used to explore the influencing factors of osteoporosis after SCI. p < 0.05 was considered statistically significant. RESULTS: The incidence of bone loss in patients with SCI was 66.3%. There was a low concordance between bone loss in the lumbar spine and the hip, and the hip was particularly susceptible to bone loss after SCI, with an upward trend in incidence (36% - 82%). In this study, patients with SCI were divided into the lumbar spine group (n = 100) and the hip group (n = 185) according to the BMD values of different sites. Then, the lumbar spine group was divided into the normal bone mass group (n = 53) and the osteopenia group (n = 47); the hip joint group was divided into the normal bone mass group (n = 83) and the osteopenia group (n = 102). Of these, lumbar bone loss after SCI is correlated with gender and weight (p = 0.032 and < 0.001, respectively), and hip bone loss is correlated with gender, height, weight, and time since injury (p < 0.001, p = 0.015, 0.009, and 0.012, respectively). CONCLUSIONS The incidence of bone loss after SCI was high, especially in the hip. The incidence and influencing factors of bone loss in the lumbar spine and hip were different. Patients with SCI who are male, low height, lightweight, and long time after injury were more likely to have bone loss.
Humans ; Spinal Cord Injuries/complications* ; Male ; Female ; Retrospective Studies ; Incidence ; Adult ; Bone Density ; Middle Aged ; Case-Control Studies ; Osteoporosis/etiology* ; Lumbar Vertebrae ; Bone Diseases, Metabolic/etiology* ; Aged ; Risk Factors

Background and Aims:Surgical treatment is a cornerstone of breast cancer management;however,the physical trauma and psychological burden associated with surgery may adversely affect patients'quality of life(QoL).Based on data from a prospective cohort,this study was conducted to evaluate changes in postoperative QoL among breast cancer patients and to identify mediating factors influencing QoL,thereby providing evidence for perioperative rehabilitation strategies.Methods:Female breast cancer patients who underwent local surgical treatment at Suining Central Hospital between June 2024 and January 2025 were enrolled.The Constant-Murley Shoulder Score,EORTC QLQ-C30,and QLQ-BR23 questionnaires were used pre-and postoperatively to assess shoulder joint function,and QoL.Paired t-tests were used to analyze changes in scores before and after surgery.A mediation model was applied to explore the indirect pathways through which surgery impacts QoL.Additionally,subgroup analyses were conducted to compare QoL changes across different surgical modalities.Results:A total of 148 patients were included,with median age of 54(46-60)years old Postoperative psychological health significantly improved,while shoulder function and overall QoL scores markedly declined(all P<0.001).According to QLQ-C30,functional domains such as physical and role functioning worsened,while symptom burden increased.The QLQ-BR23 revealed significantly higher scores for breast and upper limb symptoms postoperatively(both P<0.001).Subgroup analyses showed that patients undergoing axillary lymph node dissection experienced greater declines in shoulder function and QoL compared to those receiving sentinel lymph node biopsy(both P<0.05).QoL deterioration was comparable between mastectomy and breast-conserving surgery,although the former was associated with more prominent pain and breast symptoms.Mediation analysis indicated that shoulder function,breast symptoms,and physical functioning served as mediators in the impact of surgery on QoL,while better psychological health exerted a protective effect.Conclusion:Surgical treatment significantly affects postoperative QoL in breast cancer patients,with local functional impairment and symptom exacerbation serving as key mediators.Different surgical approaches have varying impacts on QoL.Enhancing postoperative shoulder rehabilitation,symptom management,and psychological support may improve patients'QoL.

Objective To explore the efficacy differences between 3 Tesla magnetic resonance imaging with zero echo time(3T MRI ZTE)and high resolution computed tomography(HRCT)in the detection of pulmonary nodules and the classification diagnosis of the lung imaging reporting and data system(Lung-RADS)in sub-health populations.Methods Clinical and imaging data of 93 patients with pulmonary nodules(126 nodules in total)admitted to some hospital from July to December 2023 were retrospectively analyzed.The 126 nodules were categorized into a benign nodule group(n=51)and a malignant nodule group(n=75)using pathological findings as the gold standard.All the patients underwent examinations by 3T MRI ZTE and HRCT to compare the detection rates of the two measures for pulmonary nodules;the missed and misdiagnosis rates of 3T MRI ZTE,HRCT and Lung-RADS grading were contrasted with the postoperative pathological diagnosis results as the gold standard;comparison analyses of 3T MRI ZTE signs and HRCT signs were performed between the two groups and the patients with different Lung-RADS grades;3T MRI ZTE,HRCT and Lung-RADS grading were compared with the receiver operating characteristic(ROC)curve in terms of diagnosis efficacy for pulmonary nodules,and the consistency analysis was carried out.Results No discernible statistical variation was observed in the detection rates of pulmonary nodules between 3T MRI ZTE and HRCT(P>0.05).Lung-RADS grading had the highest rates of missed diagnosis and misdiagnosis,and 3T MRI ZTE and HRCT had similar detection rates.The malignant nodule group was different from the benign nodule group in the 3T MRI ZTE and HRCT signs in terms of lesion size,spiculation sign,lobulation sign,calcifica-tion,pleural indentation sign,cavity sign,boundary and bronchial cut-off sign,with the differences being statistically signi-ficant(all P<0.05).For the patients of Lung-RADS grade 3,the 3T MRI ZTE and HRCT signs had significant differences in terms of lesion size,spiculation sign,lobulation sign,calcification,pleural indentation sign,cavity sign and bronchial cut-off sign(all P<0.05).For the patients of Lung-RADS grade 4A,the 3T MRI ZTE and HRCT signs had significant differen-ces in terms of lesion size,calcification,boundary and bronchial cut-off sign(all P<0.05).For the patients of Lung-RADS grade 4B,the 3T MRI ZTE and HRCT signs had significant differences in terms of lesion size and calcification(all P<0.05).For the patients of Lung-RADS grade 4X,there were no significant differences found between the 3T MRI ZTE and HRCT signs(all P>0.05).HRCT had the highest sensitivity,specificity,accuracy,AUC value,predictive values and Kappa value for benign and malignant nodules,3T MRI ZTE had the values slightly lower than those of HRCT,and Lung-RADS grading had the lowest values when compared with HRCT and 3T MRI ZTE.Conclusion HRCT and 3T MRI ZTE are complementary for the evaluation of pulmonary nodules,and the differences in imaging signs between them show graded dependence.3T MRI ZTE and HRCT have no significant differences in the detection rate of pulmonary nodules,while HRCT gains advanta-ges in differentiating benign and malignant pulmonary nodules,and references are provided for the screening and clinical early diagnosis of pulmonary nodules.[Chinese Medical Equipment Journal,2025,46(9):52-59]

Objective:To investigate the causal effects of plasma lipidomics on pancreatitis using Mendelian ran-domization(MR)and evaluate the roles of intra-pancreatic fat deposition(IPFD)and gallstone disease in this relation-ship.Methods:A bidirectional MR analysis was conducted,with 179 plasma lipids as exposures and acute pancreati-tis(AP)and chronic pancreatitis(CP)as outcomes.Data were sourced from genome-wide association studies(GWAS),the UK Biobank,and the FinnGen project.Two-step Mendelian randomization(TSMR)and multivariable Mendelian ran-domization(MVMR)analyses were applied to assess the mediating roles of IPFD and gallstone disease in the associa-tion between plasma lipids and pancreatitis.Results:MR analysis identified two sterols negatively associated with AP(P＜0.05)and seven sterols negatively associated with CP(P＜0.05).One phospholipid showed a positive association with CP(P＜0.05).IPFD was positively associated with both AP and CP.Gallstone disease was confirmed as a risk fac-tor for AP.However,TSMR analysis indicated that neither IPFD nor gallstone disease mediated the relationship be-tween plasma lipids and pancreatitis.Conclusion:The causal relationship exists among plasma lipomics and AP/CP,also between IPFD,cholelithiasis and pancreatitis.These findings highlight novel risk factors and potential biomarkers to support early diagnosis and intervention for pancreatitis.

Background and Aims:Surgical treatment is a cornerstone of breast cancer management;however,the physical trauma and psychological burden associated with surgery may adversely affect patients'quality of life(QoL).Based on data from a prospective cohort,this study was conducted to evaluate changes in postoperative QoL among breast cancer patients and to identify mediating factors influencing QoL,thereby providing evidence for perioperative rehabilitation strategies.Methods:Female breast cancer patients who underwent local surgical treatment at Suining Central Hospital between June 2024 and January 2025 were enrolled.The Constant-Murley Shoulder Score,EORTC QLQ-C30,and QLQ-BR23 questionnaires were used pre-and postoperatively to assess shoulder joint function,and QoL.Paired t-tests were used to analyze changes in scores before and after surgery.A mediation model was applied to explore the indirect pathways through which surgery impacts QoL.Additionally,subgroup analyses were conducted to compare QoL changes across different surgical modalities.Results:A total of 148 patients were included,with median age of 54(46-60)years old Postoperative psychological health significantly improved,while shoulder function and overall QoL scores markedly declined(all P<0.001).According to QLQ-C30,functional domains such as physical and role functioning worsened,while symptom burden increased.The QLQ-BR23 revealed significantly higher scores for breast and upper limb symptoms postoperatively(both P<0.001).Subgroup analyses showed that patients undergoing axillary lymph node dissection experienced greater declines in shoulder function and QoL compared to those receiving sentinel lymph node biopsy(both P<0.05).QoL deterioration was comparable between mastectomy and breast-conserving surgery,although the former was associated with more prominent pain and breast symptoms.Mediation analysis indicated that shoulder function,breast symptoms,and physical functioning served as mediators in the impact of surgery on QoL,while better psychological health exerted a protective effect.Conclusion:Surgical treatment significantly affects postoperative QoL in breast cancer patients,with local functional impairment and symptom exacerbation serving as key mediators.Different surgical approaches have varying impacts on QoL.Enhancing postoperative shoulder rehabilitation,symptom management,and psychological support may improve patients'QoL.