ObjectiveMitochondria are not only the central organelles responsible for cellular energy metabolism but also play essential roles in regulating cell cycle progression and cytoskeletal dynamics. In recent years, accumulating evidence has demonstrated that mitochondrial homeostasis is closely associated with mitotic progression and cytokinesis. Schizosaccharomyces pombe serves as a classical and well-established model organism. Because its cell cycle regulatory mechanisms are highly conserved throughout evolution, its genetic background is clearly defined, and experimental manipulation is efficient and convenient, it has been extensively applied in studies of cell growth, division, and reproductive mechanisms. The SPBC1604.04 gene encodes a previously uncharacterized mitochondrial carrier protein in Schizosaccharomyces pombe. This gene is located on chromosome II and spans 1 018 base pairs in length. It encodes a protein consisting of 238 amino acids with a predicted molecular mass of approximately 31.03 ku. Bioinformatic analysis predicts that this protein is responsible for the transport of thiamine pyrophosphate (TPP) into mitochondria. However, the effects of SPBC1604.04 gene deletion on mitotic cell dynamics under different temperature conditions have not been fully elucidated. MethodsThe SPBC1604.04 deletion strain of Schizosaccharomyces pombe was used as the experimental model. Fluorescent protein markers were constructed in the deletion background to label mitochondria, microtubules, actin, myosin, the nuclear envelope, and chromosomes. Live-cell imaging was performed using a TCS-SP8 laser scanning confocal microscope under normal temperature conditions (25℃) and heat stress conditions (37℃). Time-lapse microscopy was applied to dynamically monitor mitochondrial morphology and distribution, spindle assembly and elongation, chromosome segregation, as well as the formation and constriction of the actomyosin ring during cytokinesis. ImageJ software was used for quantitative measurements, including microtubule length during mitosis, spindle length at different mitotic stages, mitochondrial fluorescence intensity as an indicator of mitochondrial content, actomyosin ring length, nuclear envelope area, and chromosome segregation timing. Statistical analyses were conducted to compare phenotypic differences between the wild-type and SPBC1604.04 deletion strains at both temperature conditions. Through these analyses, we systematically investigated the impact of SPBC1604.04 deletion on mitotic cell dynamics in fission yeast under both normal physiological conditions and temperature stress. ResultsAt 25℃, compared with wild-type cells, the SPBC1604.04Δ strain exhibited a pronounced tendency toward mitochondrial fragmentation, accompanied by abnormal mitochondrial content and a significant reduction in mitochondrial fluorescence intensity. These observations suggest impaired mitochondrial homeostasis under normal growth conditions. In addition, the constriction time of actomyosin ring during cytokinesis was markedly prolonged, indicating that deletion of SPBC1604.04 affects the dynamics of the contractile machinery. However, no obvious defects were observed in spindle assembly, spindle elongation, or chromosome segregation. Under heat stress at 37℃, mitochondrial morphology in the SPBC1604.04Δ strain showed a tendency to recover toward a continuous tubular network structure. Mitochondrial content was restored, fluorescence intensity increased, and the constriction time of the actomyosin ring returned to levels comparable to those of wild-type cells. These results indicate that the mitotic defects observed at normal temperature are partially or fully alleviated under heat stress conditions. ConclusionThis study demonstrates that deletion of the SPBC1604.04 gene leads to abnormal mitochondrial content in Schizosaccharomyces pombe. The mitochondrial carrier protein SPBC1604.04 participates in regulating actomyosin ring constriction during mitosis but does not appear to be directly involved in the regulation of spindle dynamics or chromosome segregation. Our findings provide key experimental evidence for understanding the functional link between the SPBC1604.04 gene, mitochondrial homeostasis, and mitotic regulation.

ObjectiveMitochondria are not only the central organelles responsible for cellular energy metabolism but also play essential roles in regulating cell cycle progression and cytoskeletal dynamics. In recent years, accumulating evidence has demonstrated that mitochondrial homeostasis is closely associated with mitotic progression and cytokinesis. Schizosaccharomyces pombe serves as a classical and well-established model organism. Because its cell cycle regulatory mechanisms are highly conserved throughout evolution, its genetic background is clearly defined, and experimental manipulation is efficient and convenient, it has been extensively applied in studies of cell growth, division, and reproductive mechanisms. The SPBC1604.04 gene encodes a previously uncharacterized mitochondrial carrier protein in Schizosaccharomyces pombe. This gene is located on chromosome II and spans 1 018 base pairs in length. It encodes a protein consisting of 238 amino acids with a predicted molecular mass of approximately 31.03 ku. Bioinformatic analysis predicts that this protein is responsible for the transport of thiamine pyrophosphate (TPP) into mitochondria. However, the effects of SPBC1604.04 gene deletion on mitotic cell dynamics under different temperature conditions have not been fully elucidated. MethodsThe SPBC1604.04 deletion strain of Schizosaccharomyces pombe was used as the experimental model. Fluorescent protein markers were constructed in the deletion background to label mitochondria, microtubules, actin, myosin, the nuclear envelope, and chromosomes. Live-cell imaging was performed using a TCS-SP8 laser scanning confocal microscope under normal temperature conditions (25℃) and heat stress conditions (37℃). Time-lapse microscopy was applied to dynamically monitor mitochondrial morphology and distribution, spindle assembly and elongation, chromosome segregation, as well as the formation and constriction of the actomyosin ring during cytokinesis. ImageJ software was used for quantitative measurements, including microtubule length during mitosis, spindle length at different mitotic stages, mitochondrial fluorescence intensity as an indicator of mitochondrial content, actomyosin ring length, nuclear envelope area, and chromosome segregation timing. Statistical analyses were conducted to compare phenotypic differences between the wild-type and SPBC1604.04 deletion strains at both temperature conditions. Through these analyses, we systematically investigated the impact of SPBC1604.04 deletion on mitotic cell dynamics in fission yeast under both normal physiological conditions and temperature stress. ResultsAt 25℃, compared with wild-type cells, the SPBC1604.04Δ strain exhibited a pronounced tendency toward mitochondrial fragmentation, accompanied by abnormal mitochondrial content and a significant reduction in mitochondrial fluorescence intensity. These observations suggest impaired mitochondrial homeostasis under normal growth conditions. In addition, the constriction time of actomyosin ring during cytokinesis was markedly prolonged, indicating that deletion of SPBC1604.04 affects the dynamics of the contractile machinery. However, no obvious defects were observed in spindle assembly, spindle elongation, or chromosome segregation. Under heat stress at 37℃, mitochondrial morphology in the SPBC1604.04Δ strain showed a tendency to recover toward a continuous tubular network structure. Mitochondrial content was restored, fluorescence intensity increased, and the constriction time of the actomyosin ring returned to levels comparable to those of wild-type cells. These results indicate that the mitotic defects observed at normal temperature are partially or fully alleviated under heat stress conditions. ConclusionThis study demonstrates that deletion of the SPBC1604.04 gene leads to abnormal mitochondrial content in Schizosaccharomyces pombe. The mitochondrial carrier protein SPBC1604.04 participates in regulating actomyosin ring constriction during mitosis but does not appear to be directly involved in the regulation of spindle dynamics or chromosome segregation. Our findings provide key experimental evidence for understanding the functional link between the SPBC1604.04 gene, mitochondrial homeostasis, and mitotic regulation.

Most of the medical colleges and universities in China follow the traditional three-stage teaching mode centering on subjects, and a number of colleges and universities have implemented the teaching mode of organ-system-based curriculum (OSBC). With the OSBC course for the nervous system in our university as an example, this article analyzes the advantages and challenges of OSBC course of the nervous system in the context of integrative medicine.
Neurology

Objective To explore macrophage subpopulations in ischemic stroke (IS) by using single-cell RNA sequencing (scRNA-seq) data analysis and High-Dimensional Weighted Gene Co-Expression Network Analysis (hdWGCNA). Methods Based on single-cell sequencing data, transcriptomic information for different cell types was obtained, and macrophages were selected for subpopulation identification. hdWGCNA, cell-cell communication, and pseudotime trajectory analysis were used to explore the characteristics of macrophage subpopulations following IS. Key genes related to IS were identified using microarray data and validated for diagnostic potential through Receiver Operating Characteristic (ROC) analysis. Gene Set Enrichment Analysis (GSEA) was conducted to investigate the potential functions of these genes. Results The scRNA-seq data analysis revealed significant changes in macrophage subpopulation composition after IS. A specific macrophage subpopulation enriched in the stroke group was identified and designated as MCAO-specific macrophages (MSM). Pseudotime trajectory analysis indicated that MSM cells were in an intermediate stage of macrophage differentiation. Cell-cell communication analysis uncovered complex interactions between MSM cells and other cells, with the CCL6-CCR1 signaling axis potentially playing a crucial role in neuroinflammation. Two gene modules associated with MSM were identified via hdWGCNA, significantly enriched in pathways related to NOD-like receptors and antigen processing. By integrating differentially expressed MSM genes with conventional transcriptomic data, three IS-related hub genes were identified: Arg1, CLEC4D, and CLEC4E. Conclusion This study reveals the characteristics and functions of macrophage subpopulations following IS and identifies three hub genes with potential diagnostic value, providing novel insights into the pathological mechanisms of IS.
Macrophages/metabolism* ; Computational Biology/methods* ; Single-Cell Analysis/methods* ; Transcriptome ; Ischemic Stroke/metabolism* ; Animals ; Gene Regulatory Networks ; Gene Expression Profiling ; Humans ; Male

PURPOSE: We carried out the study aiming to explore and analyze the risk factors, the distribution of pathogenic bacteria, and their antibiotic-resistance characteristics influencing the occurrence of surgical site infection (SSI), to provide valuable assistance for reducing the incidence of SSI after traumatic fracture surgery. METHODS: A retrospective case-control study enrolling 3978 participants from January 2015 to December 2019 receiving surgical treatment for traumatic fractures was conducted at Tangdu Hospital of Air Force Medical University. Baseline data, demographic characteristics, lifestyles, variables related to surgical treatment, and pathogen culture were harvested and analyzed. Univariate analyses and multivariate logistic regression analyses were used to reveal the independent risk factors of SSI. A bacterial distribution histogram and drug-sensitive heat map were drawn to describe the pathogenic characteristics. RESULTS: Included 3978 patients 138 of them developed SSI with an incidence rate of 3.47% postoperatively. By logistic regression analysis, we found that variables such as gender (males) (odds ratio (OR) = 2.012, 95% confidence interval (CI): 1.235 - 3.278, p = 0.005), diabetes mellitus (OR = 5.848, 95% CI: 3.513 - 9.736, p < 0.001), hypoproteinemia (OR = 3.400, 95% CI: 1.280 - 9.031, p = 0.014), underlying disease (OR = 5.398, 95% CI: 2.343 - 12.438, p < 0.001), hormonotherapy (OR = 11.718, 95% CI: 6.269 - 21.903, p < 0.001), open fracture (OR = 29.377, 95% CI: 9.944 - 86.784, p < 0.001), and intraoperative transfusion (OR = 2.664, 95% CI: 1.572 - 4.515, p < 0.001) were independent risk factors for SSI, while, aged over 59 years (OR = 0.132, 95% CI: 0.059 - 0.296, p < 0.001), prophylactic antibiotics use (OR = 0.082, 95% CI: 0.042 - 0.164, p < 0.001) and vacuum sealing drainage use (OR = 0.036, 95% CI: 0.010 - 0.129, p < 0.001) were protective factors. Pathogens results showed that 301 strains of 38 species of bacteria were harvested, among which 178 (59.1%) strains were Gram-positive bacteria, and 123 (40.9%) strains were Gram-negative bacteria. Staphylococcus aureus (108, 60.7%) and Enterobacter cloacae (38, 30.9%) accounted for the largest proportion. The susceptibility of Gram-positive bacteria to Vancomycin and Linezolid was almost 100%. The susceptibility of Gram-negative bacteria to Imipenem, Amikacin, and Meropenem exceeded 73%. CONCLUSION Orthopedic surgeons need to develop appropriate surgical plans based on the risk factors and protective factors associated with postoperative SSI to reduce its occurrence. Meanwhile, it is recommended to strengthen blood glucose control in the early stage of admission and for surgeons to be cautious and scientific when choosing antibiotic therapy in clinical practice.
Humans ; Surgical Wound Infection/epidemiology* ; Male ; Female ; Risk Factors ; Retrospective Studies ; Middle Aged ; Adult ; Case-Control Studies ; Fractures, Bone/surgery* ; Aged ; Drug Resistance, Bacterial ; Logistic Models ; Anti-Bacterial Agents/therapeutic use* ; Incidence ; Bacteria/drug effects*

Objective Based on a complete Freund's adjuvant(CFA)-induced chronic inflammatory pain model,we compared and analyzed the differences in anti-inflammatory and analgesic effects of moxibustion intervention initiated at different timepoints,aiming to identify the optimal timing for moxibustion intervention.The goal is to establish standardized intervention protocols for basic research on the anti-inflammatory and analgesic effects of moxibustion.Methods Male C57BL/6 mice were randomly divided into 3 groups based on the moxibustion initiation timepoints of 4,7,and 10 d after modeling.Then,the mice in each group were randomly assigned to 3 subgroups,including a control group,a model group,and a moxibustion group,with 8 mice in each subgroup.Chronic inflammatory pain was induced by injecting 20 μL of CFA into the sole of the right hind paw.Moxibustion applied at the"Zusanli"acupoint for 30 minutes started on the 4th,7th,and 10th days after modeling,and the intervention continued for 7 days.The latency of paw withdrawal to thermal radiation was measured to evaluate the pain threshold before modeling,after modeling,and on the 1st,4th,and 7th days of treatment.Foot volume was measured to assess toe swelling before modeling,after modeling,and on the 1st and 7th days of treatment.Results Compared with the control group,the model group exhibited a reduced pain threshold(P＜0.0001)and increased paw volume(P＜0.0001).Compared with the model group,the subgroups receiving moxibustion intervention initiated on the 4th,7th,and 10th days post-modeling exhibited an increased pain threshold(P＜0.05,P＜0.0001).However,the paw volume of the subgroups receiving moxibustion intervention initiated on the 4th day post-modeling increased(P＜0.0001),while those of the subgroups receiving moxibustion intervention initiated on the 7th and 10th days post-modeling decreased(P＜0.0001).Among the intervention subgroups receiving moxibustion initiated on days 4,7,and 10,the day 7 intervention-initiating subgroup showed significant increase in pain threshold(P＜0.05,P＜0.0001),and the day 7 and day 10 intervention-initiating subgroups showed significantly reduced paw volume(P＜0.0001).Conclusion Considering both the analgesic and anti-inflammatory effects of moxibustion,day 7 post-modeling may be the optimal time for moxibustion to achieve effective anti-inflammatory and analgesic outcomes.

In January 2021, a young male patient was admitted to the Department of Hand Surgery, Suzhou Ruihua Orthopeadic Hospital for a soft tissue degloving defect of distal segment of right thumb caused by machine compression. The thumb defect was reconstructed using a tiled flap with a right hallux nail flap and a lateral flap of left second toe. Donor site of the hallux nail flap was reconstructed by a lateral flap of right second toe, while the donor site of lateral flap of left second toe was covered by a skin graft of abdomen. At 1-year follow-up, the reconstructed nail was found excellent according to the established criteria. Two-point discrimination (TPD) was measured at 5 mm, and the affected thumb exhibited satisfactory flexion and extension and functions of thumb-to-palm and thumb-to-fingers oppositions. Donor sites in both feet achieved favorable appearance and function, with a Maryland foot score of 96. Only a linear scar was in abdominal donor site.

Objective:To explore the clinical phenotypes and hematological characteristics of β-thalassemia combined with α-globin gene triplet.Methods:A retrospective case analysis study was conducted, taking individuals diagnosed with thalassemia who sought for outpatient services in No 1 people′s hospital of Chenzhou affiliated to South China University from August 10, 2021, to December 31, 2023 as study objectives. Among them, there were 8 768 males and 11 707 females, aged 31.5 (23.0, 46.0) years old. Blood analysis were analyzed by hematology analyze.The hemoglobin(Hb) Hb A, HbA 2,Hb F bands were analyzed by Capillary electrophoresis method, and the genotypes of thalassemia were analyzed by high-throughput sequencing technology.Hematological parameters between different genotypes of thalassemia were analyzed using t-tests and calibrated t-tests for data analysis. Results:A total of 27 cases of beta thalassemia combined with alpha globin triplet were detected, The average hemoglobin (Hb) of 11 cases of β Codon41/42 (-CTTT)/β N combined with ααα anti 4.2 (3.7) (92±16)g/L was lower than that of β Codon41/42 (-CTTT)/β N(112±11)g/L, and the difference was statistically significant ( t=3.97, P0.05). The average Hb of 8 cases of β IVS-Ⅱ-654 (CT)/β N combined with ααα anti 4.2 (3.7)(85±21) g/L was lower than that of β IVS-Ⅱ-654 (CT)/β N(116±12) g/L, and the difference was statistically significant ( t=4.05, P0.05). Conclusion:When the mutation site is at Codon41/42 (-CTTT) or IVS-Ⅱ-654 (CT), β-thalassemia combined with alpha globin triplet can make the clinical manifestations of β-thalassemia at this site more pronounced.

Clinically,patients with high-risk cholecystitis are often facing the therapeutic choice of permanent cholecystostomy drainage or high-risk surgery.With the development of percutaneous interventional therapy techniques in recent years,minimally invasive treatment have provided more therapeutic options for these patients.Cryoablation,chemical ablation,and gallbladder-intestine anastomosis are considered as the promising methods for the treatment of cholecystitis.Different combinations of percutaneous cholecystostomy(PC)with sequential cryoablation,chemical ablation,or gallbladder-intestine internal drainage have achieved a high success rate in treating cholecystitis,thus,providing patients with an option of non-surgical resection.This article aims to make a comprehensive review about various percutaneous treatment methods for cholecystitis so as to provide useful references for clinical practice.

Objective To evaluate the effectiveness of information quality control for venous thromboembolism(VTE)in Shanghai municipal hospitals.Methods Retrospective analysis of VTE information statistics of hospitalized pa-tients in Shanghai municipal hospitals in 2023,combined with questionnaire surveys and on-site visits,to evaluate the effectiveness of VTE information quality control in municipal hospitals.Results Shanghai municipal hospitals have established a relatively complete hospital VTE prevention and control management system.In 2023,the risk assess-ment rate of VTE for hospitalized patients in Shanghai municipal hospitals was 88.43％,the risk assessment rate of VTE bleeding was 55.97％,the appropriate prophylaxis rate of VTE was 74.14％,the incidence rate of VTE was 0.86％,and the incidence rate of hospital related VTE was 0.47％.Conclusion The establishment of the VTE information monitoring platform for inpatients in Shanghai municipal hospital has effectively improved the stan-dardized prevention and treatment level of VTE and hospital management efficiency in hospitals.