Objective:To establish tumor specific protein (SP70) targeted tumor cell enrichment technology and to assess applicational value of next-generation sequencing (NGS) analysis for enriched circulating tumor cell (CTC) in precision medicines of non-small cell lung cancer (NSCLC).Methods:The monoclonal antibody NJ001 was covalently coupled to the surface of magnetic beads to build targeted magnetic bead enrichment technology based on SP70. The limit of detection, coincidence rate, interference experiment, recovery test and clinical performance were evaluated. From March 2016 to August 2017, NGS analysis with or without pre-treatment of targeted enrichment for serous fluids of 43 NSCLC in the First Affiliated Hospital with Nanjing Medical University were compared (Kappa or Fisher exact test).Results:The CTC enrichment technology based on SP70 targeted immunomagnetic beads can specifically enrich tumor cells. The limit of detection was 10 4 SPC-A1 cells/L, and the coincidence rate, sensitivity and specificity were 100% (3/3). The endogenous interfering substances such as red blood cells, hemoglobin, white blood cells, epithelial cells and triglycerides had no interfering effects, as well as the exogenous interfering substances such as EDTA-K2, cefoxitin, carboplatin and paclitaxel. The recovery rate was 56.0% (56 000/100 000). A total of 30 gene mutations including 65 loci were found in 43 NSCLC under SP70 targeted enrichment, with a higher detection rate compared with unenrichment method [95.0% (19/20) vs 65.0% (13/20), χ 2=5.625, P=0.044]. Conclusion:In this study, SP70-targeted enriched CTC liquid biopsy method was established, with higher sensitivity and specificity of NGS detection than unenrichment method.

AIM To investigate the ameliorative effects of Compound Fufangteng Mixture(CFM)on cyclophosphamide(CTX)-induced immunosuppression in mice.METHODS Forty-eight male C57BL/6J mice were randomly divided into the blank control group,the model group,the levamisole hydrochloride group(40 mg/kg)and the low-dose,medium-dose and high-dose CFM groups(3.75,7.5,10 g/kg),with 8 mice in each group,and given respective intervention orally once daily for 14 days.On the 5th to 7th day of administration,with the blank control group given normal saline intraperitoneally,the other groups underwent intraperitoneal CTX injections(80 mg/kg).24 hours after the last administration,organ indices of thymus and spleen were calculated;splenic histopathological alterations were assessed by HE staining;serum levels of IL-2,IL-6 and IgG were quantified using ELISA;splenic CD4+,CD8+T lymphocytes,alongside CD86+and CD206+macrophages populations were analyzed by flow cytometry;and splenic expression of CD4,CD8 and F4/80 was evaluated by immunohistochemical staining.RESULTS In CTX-treated mice,CFM administration mitigated body weight loss;enhanced thymus weight and thymic index;ameliorated splenic immune cell populations,elevated serum levels of cytokines IL-2,IL-6 and IgG in serum;and upregulated splenic levels of CD45+CD3+T lymphocytes and F4/80+CD11b+macrophages,alongside increasing the expression of CD4,CD8 and F4/80 surface markers.CONCLUSION CFM alleviates CTX-induced immunosuppression state in mice by modulating immune cells,restoring immune function and enhancing anti-inflammatory and tissue repair capabilities.

In-depth study of the components of polymyxins is the key to controlling the quality of this class of antibiotics.Similarities and variations of components present significant analytical challenges.A two-dimensional(2D)liquid chromatography-mass spectrometry(LC-MS)method was established for screening and comprehensive profiling of compositions of the antibiotic colistimethate sodium(CMS).A high concentration of phosphate buffer mobile phase was used in the first-dimensional LC system to get the components well separated.For efficient and high-accuracy screening of CMS,a targeted method based on a self-constructed high resolution(HR)mass spectrum database of CMS components was established.The database was built based on the commercial MassHunter Personal Compound Database and Library(PCDL)software and its accuracy of the compound matching result was verified with six known components before being applied to genuine sample screening.On this basis,the unknown peaks in the CMS chromatograms were deduced and assigned.The molecular formula,group composition,and origins of a total of 99 compounds,of which the combined area percentage accounted for more than 95％of CMS components,were deduced by this 2D-LC-MS method combined with the MassHunter PCDL.This profiling method was highly efficient and could distinguish hundreds of components within 3 h,providing reliable results for quality control of this kind of complex drugs.

Cervical spinal cord injury without fracture-dislocation (CSCIWFD) is referred to as a special type of cervical spinal cord injury characterized by traumatic spinal cord dysfunction and no significant bony structural abnormalities on imagines. Duo to the high risk of missed diagnosis during the initial consultation, CSCIWFD may lead to progressive neurological deterioration or even complete paralysis, severely impacting patients′ prognosis. Currently, there are no established consensuses over the diagnosis and treatment of CSCIWFD, such as the lack of evidence-based standards for indications of non-surgical treatment and risk of secondary neurological injury, as well as debates over the optimal timing for surgical intervention and indications for different surgical approaches. To address these issues, the Spine Trauma Group of the Orthopedic Branch of the Chinese Medical Doctor Association organized experts in the relevant fields to formulate Diagnosis and treatment guideline for acute cervical spinal cord injury without fracture- dislocation in adults ( version 2025) . Based on evidence-based medicine and the principles of scientific rigor and clinical applicability, the guidelines proposed 11 recommendations covering terminology, diagnosis, evaluation treatment, and rehabilitation, etc., aiming to standardize the management of CSCIWFD.

Thoracolumbar spine fracture often leads to severe pain, functional impairments, and neurological deficits, for which open reduction and internal fixation can effectively restore the spinal structural stability. Open decompression and reduction with internal fixation can help relieve spinal cord compression and improve spinal function in cases of concomitant cord injury. Although spinal stability can be restored through surgery, patients often face chronic pain and functional impairments postoperatively. A postoperative rehabilitation program is critical in optimizing therapeutic outcomes, reducing complications, and minimizing the risk of secondary injuries. However, current rehabilitation methods, such as physical therapy, functional training, and pain management, are confronted with problems in clinical practice, including significant variation in efficacy, poor patient adherence, and prolonged rehabilitation period. There is an urgent need for a unified rehabilitation strategy to address these problems. To this end, the Spinal Trauma Group of the Orthopedic Physicians Branch of the Chinese Medical Association and the Spine Health Professional Committee of the Chinese Human Health Technology Promotion Association organized experts from relevant fields to formulate Evidence-based guidelines for rehabilitation treatment after internal fixation of thoracolumbar spine fracture in adults ( version 2025) by integrating evidences from clinical researches and advanced rehabilitation concepts at home and abroad. A total number of 14 recommendations concerning the rehabilitation treatment with multimodal analgesia, psychological intervention, deep vein thrombosis prevention, core muscle and extremity exercise, appropriate use of braces, early weight-bearing, device-aided rehabilitation exercise, neuroregulatory therapy, rehabilitation team were put forward, aiming to standardize the post-operative rehabilitation process following internal fixation, promote the functional recovery, and enhance patients′ quality of life.

Acute symptomatic osteoporotic thoracolumbar compression fracture (ASOTLF) can lead to chronic low back pain, kyphosis deformity, pulmonary dysfunction, loss of mobility, and even life-threatening complications. Vertebral augmentation is currently the mainstream treatment method for this condition. In 2019, the Editorial Board of Chinese Journal of Trauma and the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association collaboratively led the development of Clinical guideline for vertebral augmentation for acute symptomatic osteoporotic thoracolumbar compression fractures. Six years later, with advances in clinical diagnosis and treatment techniques as well as accumulating evidence in related fields, the 2019 guideline requires updating. To this end, the Spinal Trauma Group of Orthopedic Surgeons Branch of Chinese Medical Doctor Association, the Spinal Health Professional Committee of China Human Health Science and Technology Promotion Association, and the Minimally Invasive Orthopedics Professional Committee of Shaanxi Medical Doctor Association have organized experts in the field to develop the Clinical guideline for vertebral augmentation of acute symptomatic osteoporotic thoracolumbar compression fractures ( version 2025) , based on the latest evidence-based medical researches. This guideline incorporates 3 recommendations retained from the 2019 version with updated strength of evidence, along with 12 new recommendations. It provides recommendations from six aspects of diagnosis, pain management, treatment option selection, prevention of postoperative complications, anti-osteoporosis therapy, and postoperative rehabilitation, aiming to provide a reference for standard treatment of vertebral augmentation for ASOTLF in hospitals at all levels.

Objective To investigate the effect of LINC00839 on the malignant biological behavior of endometrial cancer cells by regulating the miR-625-5p/cytoplasmic polyadenylation element binding protein 4 (CPEB4) axis. Methods The cancer tissues and adjacent tissues of 46 patients with endometrial cancer were obtained,endometrial cancer cells of HEC-1B,Ishikawa and RL95-2 and human endometrial epithelial cells (HEEC) were cultured in vitro,and the expression levels of LINC00839,miR-625-5p and CPEB4 in tissues and cells were detected. HEC-1B cells were divided into the HEC-1B group (conventional culture),sh-Ctrl group (transfected with sh-Ctrl),sh-LINC00839 group (transfected with shRNA-LINC00839),anti-miR-625-5p group (transfected with shRNA-LINC00839 and miR-625-5p inhibitor),and anti-NC group (transfected with shRNA-LINC00839 and inhibitor-NC). The proliferation,apoptosis,migration and invasion abilities of HEC-1B cells in each group were compared,and the expressions of CPEB4 and epithelial-mesenchymal transition (EMT) related proteins were determined. The targeting relationships between LINC00839 and miR-625-5p,and miR-625-5p and CPEB4 were analyzed. Results The mRNA expression of LINC00839 and CPEB4,as well as the positive expression rate of CPEB4 protein in endometrial cancer tissues were higher than those in adjacent tissues,and the expression of miR-625-5p was lower than that in adjacent tissues (P<0.05). Compared with HEEC cells,the expression of LINC00839 and the mRNA and protein expression of CPEB4 in Ishikawa,RL95-2 and HEC-1B cells increased (P<0.05),and the expression of miR-625-5p decreased (P<0.05). Compared with the sh-LINC00839 group and anti-NC group,the protein expression of N-cadherin,Vimentin,and CPEB4,24-hour absorbance,and migration and invasion cell numbers of HEC-1B cells in the HEC-1B group,sh-Ctrl group and anti-miR-625-5p group increased (P<0.05),while the expression of E-cadherin protein and cell apoptosis rate decreased (P<0.05). There were binding sites between LINC00839 and miR-625-5p,miR-625-5p and CPEB4,with targeting regulatory relationships. Conclusion LINC00839 is related to the malignant biological behavior of endometrial cancer cells,interference with LINC00839 expression can inhibit the proliferation,invasion and migration,and promote apoptosis of HEC-1B cells,and its mechanism may be achieved by regulating the miR-625-5p/CPEB4 axis.

Objective To investigate the factors influencing pathologic complete response(pCR)after neoadjuvant chemotherapy(NAC)and its correlation with prognosis in patients with human epidermal growth factor receptor 2(HER2)-low breast cancer.Methods A retrospective analysis was conducted on patients with HER2-low breast cancer who underwent NAC at the Second Affiliated Hospital of Jiujiang College from February 28,2018 to February 28,2021.Patients were divided into pCR group(achieved pCR,n=143)and non-pCR group(did not achieve pCR,n=300)based on pCR status.General clinicopathological data were collected and compared between the two groups,including age,surgical method,NAC regimen,postoperative radiotherapy,clinical tumor stage,tumor cT stage,tumor cN stage,pathological type,tumor Nottingham grade,hormone receptor(HR)status,Ki-67 status,menopausal status,and endocrine therapy.Binary logistic regression analysis was used to identify factors influencing pCR after NAC.Propensity score matching(1:1)was employed to balance baseline characteristics between the two groups.The matched groups'baseline data were compared.Kaplan-Meier method was used for survival analysis of the matched cohorts.Multivariate Cox proportional hazards regression models were used to analyze the independent influence of pCR on disease-free survival(DFS)and overall survival(OS)in HER2-low breast cancer after matching.Results A total of 443 patients with HER2-low breast cancer receiving NAC were included,with a mean age of(49.5±8.0)years.Binary logistic regression analysis identified clinical tumor stage(OR=0.498,95%CI 0.267-0.930),HR status(OR=0.513,95%CI 0.328-0.801),Ki-67 status(OR=2.580,95%CI 1.366-4.874),tumor Nottingham grade Ⅲ(OR=3.197,95%CI 1.147-8.910),and endocrine therapy(OR=0.513,95%CI 0.328-0.801)as independent factors influencing pCR after NAC(P<0.05).After propensity score matching,80 patients remained in each group(PCR and non-PCR).No significant differences were found in clinicopathological characteristics between the matched groups(P>0.05).The median follow-up time was 45.0 months(95%CI 43.1-46.9)for pCR group and 43.0 months(95%CI 41.0-45.0)for non-pCR group.The DFS rate was significantly higher in pCR group than that in non-pCR group(87.5%vs.70.0%,P=0.004),but there was no significant difference in OS rate(88.8%vs.85.0%,P=0.438).Multivariate Cox regression analysis showed that pCR was an independent factor influencing on DFS(HR=0.312,95%CI 0.142-0.688,P=0.004),but not OS in HER2-low breast cancer patients.Conclusions Patients with HER2-low breast cancer who have a lower clinical tumor stage,HR-negative status,high Ki-67 expression,high tumor Nottingham grade,and absence of endocrine therapy are more likely to achieve pCR.Achieving pCR prolongs DFS significantly but does not significantly improve OS in these patients.

Objective To design an 8-channel gene analyzer to take the place of the widely used gene analyzer with problems in inconvenient consumable replacement and short storage time of electrophoresis polymer.Methods The 8-channel gene analyzer had its mechanical components composed of an automatic sample loading table,a polymer injection module,a high-voltage temperature control module,an optical module and an integrated U box,its electrical control system made up of a host computer(an embedded computer)and three slave computers(a sampling control board,a polymer injection control board and a high-voltage temperature control board).The automatic sample loading table involved in four motors and transmission systems for x,y,z directions and optical alignment,the transmission systems adopted mainly belt drive mode and the optical alignment motor had its threads with an anti-backlash structure;the polymer injuection module was manipulated by the polymer injection control board,and the polymer block was made of highly transparent acrylic material;the high-voltage temperature control module realized the regulation of electrophoresis voltage and the detection of electrophoresis current by the low-ripple precision high-voltage power supply,and controlled the temperature of the heating furnace by the proportional-integral-differential(PID)algorithm;the optical module consisted of an excitation module and a light-receiving module,which had the base of the reflector made of low expansion coefficient alloy material;the integrated U box had the electrophoresis polymer,capillary array,polymer block and anode buffer in a plastic housing;the host computer had the data acquisition software programmed with C# and C++,and the slave computers were controlled by STM32 SCM.Results The 8-channel gene analyzer had no significant differences with the widely used ABI3500 gene analyzer in resolution,precision accuracy and clinical results.Conclusion The 8-channel gene analyzer gains advantages in consumable replacement and storage time of electrophoresis polymer,and can meet the requirements for gene sequencing.[Chinese Medical Equipment Journal,2025,46(2):24-30]