Esophageal cancer is a common malignancy with high incidence and poor prognosis. Conventional therapies fail to provide long-term benefits for patients, with postoperative recurrence and metastasis being the primary reasons for treatment failure. With the continuous development of nanomedicine, nanoparticle-based drug delivery has received widespread attention as a novel therapeutic approach. Among them, Fe3O4 magnetic nanoparticles have achieved a series of encouraging advancements in the treatment of esophageal cancer, owing to their unique superparamagnetism and biocompatibility. This paper provides a review of the relevant research on Fe3O4 magnetic nanoparticle-based drug delivery systems for the treatment of esophageal cancer.

ObjectiveTo screen and identify uridine diphosphate （UDP）-rhamnose synthase （RHM） genes from Ornithogalum saundersiae and verify their UDP-rhamnose （UDP-Rha） biosynthetic functions， thereby providing reliable candidate genes for the efficient biosynthesis of neohesperidin and other rhamnoside natural products. MethodsBased on previously reported plant RHM sequences， two candidate RHM genes， OsRHM1 and OsRHM2， were identified from O. saundersiae through transcriptome screening and sequence alignment. The two genes were cloned and subjected to bioinformatics analysis and multiple sequence alignment. An in vitro RHM-Cm1，2RhaT cascade reaction was established， and the ability of OsRHM1 and OsRHM2 to catalyze the conversion of UDP-glucose （UDP-Glc） to UDP-Rha was evaluated based on neohesperidin production. Real-time fluorescence quantitative polymerase chain reaction PCR （Real-time PCR） was performed to analyze the relative expression levels of the two genes in roots， bulbs， and leaves. ResultsThe open reading frame （ORF） of OsRHM1 was 2 076 bp and encoded 692 amino acids， with a predicted protein molecular mass of 77.97 kDa and a theoretical isoelectric point of 7.25. The ORF of OsRHM2 was 2 019 bp and encoded 673 amino acids， with a predicted protein molecular mass of 75.82 kDa and a theoretical isoelectric point of 7.24. Multiple sequence alignment showed that OsRHM1 and OsRHM2 contained the typical conserved motifs GxxGxxG/A and YxxxK of the plant RHM family and shared high amino acid sequence identity with previously reported RHMs. The in vitro cascade reaction demonstrated that both OsRHM1 and OsRHM2 were capable of catalyzing the conversion of UDP-Glc to UDP-Rha. The neohesperidin production in the OsRHM2 cascade reaction system was approximately 2.58-fold that in the OsRHM1 system. Real-time PCR analysis showed that the relative expression levels of OsRHM1 and OsRHM2 were higher in roots than in bulbs and leaves. ConclusionOsRHM2 exhibited a relatively high capacity for UDP-Rha supply and may serve as a candidate enzyme resource for the subsequent biosynthesis of rhamnoside natural products and the construction of UDP-Rha supply systems.

Objective To develop an erythrocyte-based delivery system for butyrylcholinesterase(BChE)that is capable of prophylaxis against organophosphorus nerve agents.Methods Recombinant BChE was produced and analyzed for oligomerization via polyacrylamide gel electrophoresis(PAGE)and Western blotting.A modified hypotonic preswelling method was employed to prepare BChE-loaded erythrocytes.The drug loading capacity and encapsulation efficiency were quantified using enzyme-linked immunosorbent assay(ELISA).Catalytic activity was assessed in vitro with an activity detection kit.The system was characterized via scanning electron microscopy(SEM),flow cytometry and a hematology analyzer.Results Recombinant BChE predominantly existed as dimers(85％dimer,15％monomer).The optimized volume ratio of erythrocytes to hypotonic solution was determined as 1:7.Compared with native and empty erythrocytes,BChE-loaded erythrocytes exhibited significantly higher catalytic activity(P＜0.001).The mean corpuscular volume of BChE-loaded erythrocytes increased(P＜0.001),while the mean content of corpuscular hemoglobin and hemoglobin in erythrocytes per 100 mL decreased(P＜0.001).SEM revealed no morphological differences(biconcave disc shape).Hypotonic preswelling moderately increased erythrocyte apoptosis(P＜0.001),but no statistical difference was observed between BChE-loaded and hypotonic-treated erythrocytes(P＞0.05).CD47 expression remained unchanged compared to native erythrocytes(P＞0.05).Conclusion The modified hypotonic preswelling method can generate BChE-loaded erythrocytes that retain the characteristics of native erythrocytes while conferring catalytic activity,offering a novel strategy for clinical intervention against organophosphorus poisoning.

Objective To use imaging features of pulmonary nodules to predict the risk of lymph node metastasis in patients with cT1-stage non-small cell lung cancer (NSCLC), providing a reference for clinical decision-making. Methods A retrospective analysis was conducted on the imaging features and postoperative pathological results of cT1 NSCLC patients who underwent surgical treatment at Linyi People’s Hospital from July 2019 to July 2022. Patients were grouped and analyzed according to lymph node metastasis status. Results A total of 1 123 patients were included, comprising 471 males and 652 females, with a median age of 59 (52, 66) years. Comparative analysis revealed that sex, age, nodule location, nodule size on imaging, solid component size, consolidation tumor ratio (CTR), average CT value, and tumor proximity to the pleura all influenced lymph node metastasis. A nomogram was constructed, indicating that the probability of lymph node metastasis in cT1 NSCLC was positively correlated with solid component size, CTR, and average CT value of the pulmonary nodule, and negatively correlated with patient age. The area under the receiver operating characteristic curve was 0.929. Conclusion For cT1 NSCLC patients, the probability of lymph node metastasis can be predicted by measuring the solid component size, CTR, and average CT value of the pulmonary nodule, in conjunction with patient age. However, relying solely on pulmonary nodule imaging characteristics is insufficient to determine a specific lymph node dissection strategy.

Objective:To summarize the experience of designing hair transplantation for post-cleft lip repair moustache defects based on the morphological and tissue characteristics of the upper lip.Methods:A retrospective analysis was conducted on the clinical data of male patients treated at the Hair Transplantation Center of Plastic Surgery Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College from January 2011 to July 2024. Based on the morphology and tissue texture of the upper lip after cleft lip repair, the position and shape of the moustache were designed. Hair follicles were harvested from the mid-occipital region and/or the jaw shadow area using either the strip harvesting method or the follicular unit excision (FUE) technique. Needles of 21 or 22 gauge were used to create incisions in the recipient sites down to the superficial subcutaneous layer. The hair shafts were clamped with micro-forceps and then transplanted into the recipient sites to restore the moustache shape. Postoperatively, the density, shape, direction of the moustache, and the condition of the donor site scars were observed and followed up.Results:A total of 47 male patients, aged 23-43 years (mean 28.7 years), were included. Among them, 29 had undergone lower triangular flap repair, 13 received the Millard technique, and 5 were treated with other surgical methods for cleft lip repair. For hair follicle extraction, the strip method was used in 7 cases, and FUE in 40 cases. The donor sites included the jaw shadow area (9 cases), mid-occipital region (23 cases), and a combination of both (15 cases). The number of transplanted follicular units ranged from 33 to 500 (mean 217). Follow-up duration ranged from 9 months to 10 years (mean 3.5 years). Postoperative complications included folliculitis in 6 cases, and 4 cases required additional transplantation due to insufficient density after one year. The remaining patients exhibited satisfactory hair growth, with natural mustache shape and direction. The graft survival rate was approximately 80%, and donor site scarring was minimal.Conclusion:When performing hair transplantation to treat post-cleft lip repair moustache defects, the design should prioritize the morphological and tissue characteristics of the upper lip, followed by consideration of overall position and bilateral symmetry of the moustache. Only by fully considering the characteristics of the recipient area can optimally repair outcomes be achieved.

The immune microenvironment plays a pivotal role in maintaining ovarian homeostasis. Polycystic ovary syndrome (PCOS), a common endocrine and metabolic disorder, is closely associated with immune microenvironment imbalance. This review systematically describes the dysregulation of innate immune cells (e.g., macrophages, natural killer cells and dendritic cells) and adaptive immune cells (e.g., Th1, Th2, Treg and Th17) in PCOS, highlighting their impacts on ovarian function, insulin resistance, and hyperandrogenemia. These findings underscore the central role of immune microenvironment disturbances in PCOS pathogenesis. Additionally, the association between gut microbiota dysbiosis and PCOS is explored, emphasizing how gut microbiota influences metabolic byproducts and hormonal levels to contribute to PCOS development. Furthermore, therapeutic strategies targeting immune microenvironment imbalance such as modulating macrophage polarization, restoring Th1/Th2 and Th17/Treg balance, and ameliorating gut microbiota dysbiosis are discussed, offering novel insights for PCOS immunotherapy. In conclusion, this review comprehensively analyzes the pathogenesis of PCOS from the perspective of the immune microenvironment, aiming to provide a theoretical foundation and reference for future research and clinical practice.

Objective:To design a set of new type of surgery instrument for pectus excavatum(PE),so as to improve safety and effectiveness of minimally invasive operation in surgery for PE.Methods:The design of the new type of surgical instrument for PE adopted multifunctional orthopedic board that combined both penetrating and supporting functions.The T type handle,special sealing screw for single hole,setscrew and stator,which were convenient for operation,were equipped for the orthopedic board.The new type of surgical instrument was applied in clinical PE surgery since November,2010,and a total of 1398 PE surgeries were conducted in the 10 years,which included 1078 surgeries with single hole,and 320 surgeries with multi holes.The success rate of PE surgery with single hole mode was assessed.Results:In 1398 PE surgeries,the number of PE patients,whose ages were less or equal to 12 years old,and who all adopted single hole mode,was 887 cases,and the success rate of surgery with single hole was 100%.In addition,the number of PE patients,whose age was larger than 12 years old,was 511 cases,and the surgery with single hole was successfully applied in 191 cases of them,and the success rate of surgery with single hole was 37.4%.Conclusion:The the new type of surgical instrument for PE by surgery with single hole and multi holes has mature technique,and it is safety and effectiveness,which has higher clinical application value.

Objective To investigate the impact of immunohistochemical detection of omentin-1(omentin-1),secreted phosphoprotein 1(SPP1),and mismatch repair(MMR)protein expression status on the clinicopathological characteristics and prognosis of endometrial cancer(EC),in order to provide references for disease assessment,prognosis evaluation,and the development of molecular targeted therapies.Methods A total of 159 patients diagnosed with EC who were admitted to our hospital between December 2019 and December 2021 were enrolled as the study group.Additionally,152 samples of normal endometrial tissue were collected from patients undergoing hysterectomy due to benign uterine diseases and served as the control group.The expression levels of omentin-1,SPP1,and MMR proteins in endometrial tissues were compared among the study group,the control group,and EC patients with different clinicopathological characteristics and prognostic outcomes.Spearman correlation analysis was performed to evaluate the correlations among these biomarkers in EC tissues.The influencing factors of EC prognosis were analyzed through multivariate logistic regression.Kaplan-Meier survival curves were constructed to assess the association between the expression of these proteins and patient prognosis.Results The positive expression rate of SPP1 and the MMR deletion rate in endometrial tissues of the study group were significantly higher than those in the control group(P<0.05),while the positive expression rate of omentin-1 in endometrial tissues was significantly lower than that in the control group(P<0.05).In patients with EC exhibiting myometrial invasion≥1/2,the proportion of omentin-1 negativity was lower compared to omentin-1 positivity(P<0.05).Among EC patients with poorly differentiated tumors,the rates of SPP1 positivity and MMR deficiency were significantly increased(P<0.05).Spearman correlation analysis revealed that omentin-1 expression was negatively correlated with both MMR protein deletion and SPP1 overexpres-sion(P<0.05),whereas MMR deficiency was positively correlated with SPP1 overexpression(P<0.05).In the poor prognosis group,the positive expression rate of SPP1 and the deletion rate of MMR were elevated,while omentin-1 expression was reduced in endometrial tissues(P<0.05).The results of multivariate logistic analysis showed that omentin-1 negative,SPP1 positive,and MMR deletion were risk factors for the prognosis of EC patients(P<0.05).Kaplan-Meier survival curves were constructed based on follow-up data(Figures 1-3),indicating that patients with omentin-1 negativity,SPP1 positivity,and MMR deficiency had significantly worse prognoses(P<0.05).Conclusions With the development and progression of the clinicopathological features of EC,abnormalities were observed in the immunohistochemical expression of omentin-1,SPP1,and MMR proteins.Specifically,omentin-1 negativity,SPP1 positivity,and MMR protein deletion were associated with a poorer prognosis in EC patients.

In proton therapy,prompt gamma-ray imaging is considered as one of the most promising methods for assessing proton beam range.Prompt gamma-ray imaging detector evaluates the proton beam range based on the prompt gamma-ray distribution obtained by the prompt gamma-ray imaging system,which enables high-precision measurement of the proton beam range.Herein a proton beam range verification algorithm is designed for the newly developed prototype of the range verification detector(pixelated prompt gamma-ray imaging detector),which verifies the range estimation accuracy of the prototype for different phantoms and different energies of homogeneous media through Monte Carlo simulation.The results show that the accuracy of the proton beam range verification algorithm is within 0.5 mm of the safety margin error of the Bragg peak,and the measurement accuracy is significantly improved with the increase of the number of protons,indicating that the prototype algorithm is feasible for proton beam range verification.

Purpose To investigate the value of two-dimensional speckle tracking in evaluating right ventricular function in cardiac amyloidosis(CA).Materials and Methods A total of 25 patients with CA,30 patients with hypertrophic cardiomyopathy(HCM)and 30 healthy controls were retrospectively selected from July 2021 to October 2023 in Wuhan Asia Heart Hospital.The regional difference was represented by the formula apical ratio.The parameters of conventional echocardiography,two-dimensional strain and apical ratio of the three groups were analyzed and compared.Results Only segmental strain was different in right ventricular structure and function between CA group and HCM group,and the differences were statistically significant(all P<0.05).In the CA group,the strain gradient of the right ventricle from the apex of the heart to the base was the same as that of the left ventricle,that was,the"apex preservation"pattern,which was not seen in the HCM group and the control group.Comparison of the right ventricular free wall longitudinal strain-apical ratio,right ventricle four-chamber longitudinal strain-apical ratio,left ventride global longitudinal strain-apical ratio among the three groups,it was found that the levels of CA group were higher than HCM group and control group,and the differences were statistically significant(H=40.40,43.18,55.43,all P<0.05).The right ventricular free wall longitudinal strain-apical ratio had the highest CA recognition value,the area under the curve was 0.935,sensitivity was 96%and specificity was 83%.Conclusion Two-dimensional speckle tracking can accurately evaluate the right ventricular function impairment in CA patients and provide a new choice for clinical evaluation and identification of CA patients.