ObjectiveTo investigate the regulatory effect of overexpressed protein tyrosine phosphatase non-receptor type 2 （Ptpn2） on the inflammatory response of mouse alveolar macrophages （MH-S） induced by SiO₂. MethodsCells with overexpressed Ptpn2 were constructed and induced by SiO₂. The experimental groups were divided into four groups： the negative control group with an empty vector （NC）， the overexpressed Ptpn2 group （P）， the negative control group with an empty vector + SiO₂ induction （NS）， and the overexpressed Ptpn2 + SiO₂ induction group （PS）. Isobaric tags for relative and absolute quantification （iTRAQ） combined with liquid chromatography-tandem mass spectrometry （LC-MS/MS） were used to screen differential proteins， followed by Gene Ontology （GO） and Kyoto Encyclopedia of Genes and Genomes （KEGG） database analyses. Immunofluorescence staining was used to detect the expressions of Tumor necrosis factor （TNF） α， Gasdermin D （GSDMD）， and Transforming growth factor （TGF）-β1. Western blot was used to detect the protein expression levels of PTPN2， Toll-like receptor 4 （TLR4）， tumor necrosis factor-α （TNF-α）， nucleotide-binding oligomerization domain-like receptor protein 3 （NLRP3）， and proteins related to the TGF-β1 signaling pathway in the cells of each group. ResultsiTRAQ results identified 144 differential proteins among the four groups. GO analysis showed that in biological processes （BP）， these differential proteins were mainly enriched in IκB kinase/nuclear factor-κB （NF-κB） signaling， cell activation and signal transduction involved in immune responses， and regulation of receptor signaling pathways by signal transducer and activator of transcription （STAT）， etc. KEGG analysis revealed that the differential proteins were mainly enriched in Toll-like receptor signaling pathway， NF-κB signaling pathway， NOD-like receptor signaling pathway， TGF-β signaling pathway， and TNF signaling pathway. The results of immunofluorescence staining showed that compared with the NC group， the expressions of TNF α， GSDMD， and TGF-β1 in the cells of the NS group increased （P < 0.05）； compared to the NS group， the expression of the aforementioned proteins in the PS group decreased in cellular proteins（P < 0.05）. The results of Western blot showed that compared with the NC group， the protein expression levels of PTPN2， p-NF-κB，MyD88，TLR4，NLRP3，GSDMD，Caspase-1，IL-1β， TGF-βR1， TGF-βR，p-Smad2/3 in the NS group were significantly upregulated （P < 0.05）； compared with the NS group， the expression levels of the aforementioned proteins in the PS group were significantly downregulated （P < 0.05）. ConclusionOverexpression of Ptpn2 can inhibit the protein expressions of TLR4-TNF-α signaling， NLRP3 signaling， and TGF-β1 signaling closely related to inflammatory response in SiO₂-mediated MH-S macrophages.

ObjectiveThe widespread adoption of portable fundus cameras for primary care and community screening is hindered by limitations in current autofocus(AF) technologies. Image-based methods relying on sharpness evaluation require iterative searches, resulting in slow convergence, while projection-based techniques are susceptible to optical artifacts and calibration errors. To address these challenges, this study introduces a novel AF system based on direct wavefront sensing, designed to deliver simultaneous high speed, high precision, and operational robustness within the compact form factor essential for portable ophthalmic devices. MethodsOur approach fundamentally reimagines the AF process by directly measuring the ocular wavefront aberration. We developed a custom portable fundus camera integrating a miniaturized Shack-Hartmann wavefront sensor (SHWS) into the optical path. An 850 nm laser diode projects a point source onto the retina via oblique illumination to minimize corneal reflections. Light scattered from this spot carries the eye’s refractive error through the imaging optics and is directed to the SHWS, positioned at a plane optically conjugate to the primary color CMOS imaging sensor. A microlens array within the SHWS samples the incident wavefront, generating a pattern of focal spots on a CCD. Real-time centroid analysis of these spots provides a map of local wavefront slopes. These measurements are processed through a singular value decomposition (SVD) algorithm to fit a Zernike polynomial basis set, enabling real-time reconstruction of the wavefront phase. The defocus component (S) is extracted from the second-order Zernike coefficients, providing a direct, quantitative measure of the refractive error in diopters. This value serves as a precise error signal in a closed-loop control system, which commands a voice-coil actuated focusing lens to its null position in a single, deterministic step, eliminating the need for iterative search algorithms. ResultsComprehensive evaluation demonstrated the system’s high performance. Testing on a calibrated model eye (OEMI-7) established a highly linear relationship between the computed defocus S and the focusing lens position across a ±20 Diopter (D) compensation range, achievable within a 5 mm mechanical travel. The system achieved a focusing precision of 0.08 D, corresponding to an 18-fold improvement over a conventional projection spot-size method tested under identical conditions. The total focus acquisition time, encompassing wavefront measurement, computation, and lens actuation, averaged under 0.5 s. Clinical validation with 25 human volunteers (50 eyes, refractive range -15 D to +10 D) confirmed practical efficacy. The wavefront-sensing AF succeeded in 92% of attempts with a mean time of 0.5 s, substantially outperforming a projection-based benchmark which achieved only a 32% success rate with an average time of 4.25 s. The system provided instantaneous directional guidance and maintained stability during minor ocular movements. Objective assessment of image quality, via amplitude contrast of retinal vasculature, showed consistent and significant enhancement following AF correction across the entire tested diopter range. ConclusionThis work successfully implements and validates a direct wavefront-sensing autofocus paradigm for portable fundus cameras. By directly quantifying and compensating for the optical defocus aberration, this method bypasses the fundamental limitations of image-processing and projection-based techniques, enabling rapid, precise, and deterministic diopter compensation. The developed system delivers an exceptional combination of a wide operational range (±20 D), high accuracy (0.08 D), fast convergence (0.5 s), and a compact physical footprint. This technology provides a practical and high-performance focusing solution capable of enhancing the reliability, throughput, and diagnostic utility of portable retinal imaging in large-scale screening applications. Future efforts will be directed towards system cost optimization and performance adaptation for diverse ocular conditions.

OBJECTIVE To establish a hospital preparation cost item library， providing a reference for the refined accounting management of preparation costs in medical institutions. METHODS Based on literature analysis and practical work experience， a preliminary list of cost items was drafted. The Delphi method was employed to screen and optimize the items by analyzing the questionnaire recovery rate， expert authority coefficient， item importance score， coefficient of variation， and Kendall’s W of concordance. RESULTS The questionnaire recovery rates for the two rounds of expert consultation were 95.7% and 100%， respectively； the expert authority coefficients were 0.937 and 0.939， respectively； Kendall’s W of concordance were statistically significant （ P ＜0.001）. The finally established hospital preparation cost item library included 6 first-level items （such as raw material and packaging material costs， human resource costs， and production operation costs） and 29 second-level items （including main drug raw material costs， production personnel compensation， and finished product full-item testing costs）， comprehensively covering dimensions such as raw materials and packaging materials， fixed asset depreciation and equipment maintenance， human resources， production operations， energy and environment， and R & D and other costs. CONCLUSIONS This study successfully establishes a scientific and reliable cost item library for medical institution preparations， which can guide institutions to itemize actual expenditures， provide structured evidence for autonomous pricing， and support data needs for the formulation of insurance access and payment policies for innovative preparations.

Aim To investigate the effect of icariin(ICA)on chronic ulcerative colitis(UC)in mice.Methods Male SPF-grade C57BL/6J mice were ran-domly divided into the control group,model group,low-dose ICA group,and high-dose ICA group.Except for the control group,the rest of the mice were established as chronic UC models.Expressions of tight junction proteins,inflammatory factors,fibrosis markers,macro-phage markers,and MAPK signaling pathways in the colonic epithelium of each group were determined by Western blot,qPCR,immunohistochemistry;the degree of intestinal damage and fibrosis was detected by HE and Masson staining;the co-localization of different macrophage markers with related factors was examined by immunofluorescence.Results Treatment of ICA significantly improved the general condition of chronic UC mice,decreased the infiltration of M1-type macro-phages and the secretion of pro-inflammatory factors,inhibited the MAPK signaling pathway,reduced the co-localization expression of M1-type macrophages with the MAPK signaling pathway,and downregulated the infiltration of M2-type macrophages and the secretion of pro-fibrotic factors in the colon.Conclusion ICA mitigates the inflammatory damage and fibrosis of colon in chronic UC mice.

Objective To explore the relationship between insulin resistance and idiopathic central precocious puberty(ICPP)in girls and the diagnostic value of insulin resistance.Methods Clinical data of 245 girls aged 4 to 7.5 years with low luteinizing hormone(LH)levels(0.2-0.83 IU/L),normal body weight(body mass index standard deviation score between-2 and+2),and early breast development who visited the Department of Pediatric Endocrinology,Henan Provincial Maternal and Child Health Hospital from January 2022 to March 2025 were retrospectively analyzed.According to the Expert Consensus on the Diagnosis and Treatment of Central Precocious Puberty(2022),patients were assigned to an ICPP group(n=123)or a control group(n=122).Correlations between the homeostasis model assessment of insulin resistance(HOMA-IR)and selected indices were assessed.Multivariable logistic regression was used to evaluate the association between HOMA-IR and ICPP,and the diagnostic performance of various indices for ICPP was evaluated.Results HOMA-IR was higher in the ICPP group than in the control group(P<0.001)and was positively correlated with LH peak(rs=0.467,P<0.05)and the LH peak/FSH peak ratio(rs=0.444,P<0.05).The multivariable logistic regression model including age,BMI,and basal LH showed that HOMA-IR was closely associated with ICPP(OR=2.756,95%CI:1.940-3.913).Receiver operating characteristic curve analysis showed that the areas under the curve for basal LH,HOMA-IR,and their combination in diagnosing ICPP were 0.735,0.735,and 0.805,respectively(P<0.05),and the combined model had a greater area under the curve than either basal LH or HOMA-IR alone(both P<0.05).Conclusions HOMA-IR is closely associated with ICPP in girls with low LH and normal body weight,and combining HOMA-IR with basal LH improves early identification and diagnostic efficiency in this population.

Purpose To evaluate the value of 3D amide proton transfer imaging(3D APT)and reduced field-of-view diffusion weighted imaging(rFOV DWI)in predicting histologic grade of rectal adenocarcinoma.Materials and Methods A total of 64 cases of rectal adenocarcinoma confirmed by pathology were analyzed from February 2020 to April 2023,with 28 cases in the high and 36 cases in the medium-low differentiation group,retrospectively.MRI sequences including reduced field-of-view high-resolution T2WI(rFOV T2WI),rFOV DWI and 3D APT before surgery.Two neuroradiologists delineated the solid part of the tumor layer by layer,and extracted its apparent diffusion coefficient(ADC)and magnetization transfer ratio asymmetry(MTRasym)values.Combined-parameter model(MTRasym+rADC)was constructed by binary Logistic regression.The efficacy of the single-parameter and combined-parameter model was assessed using receiver operating characteristic curve.Results The mean value of MTRasym of the medium-low group[(2.93±0.61)%]was higher than that of high differentiation group[(1.74±0.63)%](t=-7.60,P＜0.001),and the mean value of rADC of the medium-low group[(0.98±0.17)×10-3 mm2/s]was lower than that of the high differentiation group[(1.19±0.18)×10-3 mm2/s](t=4.50,P＜0.001).In the identification of histopathological grades of rectal adenocarcinoma,receiver operating characteristic analysis showed that compared with MTRasym and rADC,the combined parameter model had the highest diagnostic performance,with an area under the curve of 0.94,sensitivity and specificity of 0.86 and 0.96.Conclusion 3D APT and rFOV DWI are helpful in identifying the histopathological grade of rectal adenocarcinoma.

Objective:To construct a clinical early warning model for bladder spasm occurred after transurethral resection of the prostate(TURP)in patients with benign prostatic hyperplasia(BPH)based on LASSO regression.Methods:The clinical data of 139 patients with BPH who underwent TURP treatment in Yellow River Sanmenxia Hospital from January 2022 to June 2024 were prospectively selected,and they were divided into spasm group(39 cases)and non-spasm group(100 cases)according to whether bladder spasm occurred after surgery.The characteristics of bladder spasm occurred after TURP in patients with BPH were statistically analyzed,and the general data between the two groups were compared.LASSO regression was used to screen the characteristic variables related to bladder spasm occurred after TURP,multivariate logistic regression was used to analyze the influencing factors of bladder spasm after TURP.The prediction model of bladder spasm after TURP was constructed,and the receiver operating characteristic(ROC)curve was drawn to evaluate the efficacy of the prediction model.Results:The incidence of bladder spasm after TURP was 28.06％.There were significant differences in age,history of diabetes,operation time,temperature of irrigating fluid,traction tension of urinary catheter,prostate volume and postoperative hospital stay between non-spasm group and spasm group(P＜0.05).LASSO regression showed that operation time,age,traction tension of urinary catheter,temperature of irrigating fluid,history of diabetes were important characteristics of bladder spasm occurred after TURP.Multivariate logistic regression analysis showed that old age,history of diabetes and long operation time were independent risk factors of bladder spasm occurred after TURP(P＜0.05).ROC curve showed that the area under the curve(AUC)of the risk prediction model for bladder spasm occurred after TURP was 0.885(95％CI:0.752-0.921).Conclusions:Old age,history of diabetes and long operation time are independent risk factors of bladder spasm occurred after TURP,the clinical warning model based on LASSO regression has a certain value in predicting the risk for bladder spasm occurred after TURP,which helps to identify high-risk patients early.

Objective To explore the possibility and genetic identification method of constructing a hepatocyte-specific NLRP3 gene knockout mouse model by using Cre-LoxP system gene knockout technology.Methods Phase one:mice specifically expressing the albumin promoter-Cre(AlbCre)recombinase in hepatocytes were mated with NLRP3flox/flox mice,and the hepatocyte-specific NLRP3 gene knockout mice with the genotype of NLRP3flox/flox/AlbCre+/-(hepatocyte NLRP3 knockout group)and the control mice in the same litter with the genotype of NLRP3flox/flox/AlbCre-/-(control group in the same litter)were obtained after two generations of selection and mating.The second stage was the mass reproduction stage.Mating NLRP3flox/flox/AlbCre+/-target mice with NLRP3flox/flox mice could quickly obtain a large number of experimental target mice and control mice in the same litter.The DNA was extracted from the tails of mice after numbering,and the offspring genotype was identified by PCR.qPCR and Western blot were used to detect the mRNA and protein expression levels of NLRP3 gene in the liver tissue.HE staining was used to observe the morphological changes in liver tissues,and serum liver transaminases and inflammatory factors were detected.The changes in body weight,liver-to-body ratio and special circumstances during reproduction and development of mice in the two groups were observed.Results The offspring genotype of the target mice in the F2 generation was consistent with theoretical result of NLRP3flox/flox/AlbCre+/-.The mRNA and protein levels of NLRP3 in liver tissues of mice in the hepatocyte NLRP3 knockout group were significantly lower than those in the control group in the same litter(P<0.05).The mice in the hepatocyte NLRP3 knockout group was not affected in terms of growth,development and reproduction after the NLRP3 gene knockout.There were no statistically significant differences in the body weight,liver-to-body ratio,liver tissue morphology,serum liver transaminase or inflammatory factors between the hepatocyte NLRP3 knockout group and the control group in the same litter(P>0.05).Conclusion The Cre-LoxP gene knockout technology can be used to successfully construct a hepatocyte-specific NLRP3 gene knockout mouse model,providing an important technical support for the next step of studying the function of the NLRP3 gene in the liver at the animal level.

Objective To evaluate the clinical outcome of neurosurgical robot-assisted stereotactic puncture and drainage for brain abscess.Methods A retrospective analysis was conducted on the clinical data of 53 patients with brain abscess admitted to our hospital from January 2018 to December 2024.Among them,29 cases underwent craniotomy for abscess resection(craniotomy group),while 24 cases received neurosurgical robot-assisted stereotactic puncture and drainage(robot-assisted group).The operation time,intraoperative blood loss,decompressive craniectomy rate,proportion of postoperative antibiotic regimen adjustment,postoperative hospital stay,incidence of postoperative complications,mortality rate and Glasgow outcome scale(GOS)scores 6 months after surgery of patients were compared between the two groups.Results Compared with the craniotomy group,the robot-assisted group demonstrated significantly shorter operation time,less intraoperative blood loss,and lower incidence of postoperative complication,the differences were all statistically significant(P<0.05).However,there were no statistically significant differences in terms of decompressive craniectomy rate,postoperative hospital stay,mortality rate,GOS score,or proportion of the postoperative antibiotic regimen adjustment between the two groups(P>0.05).Conclusion As a precise and minimally invasive surgical method,neurosurgical robot-assisted stereotactic puncture and drainage for patients with brain abscess can effectively improve the operational efficiency,shorten the operation time,reduce intraoperative injury,and lower the risk of postoperative complications.It has high clinical application value and potential for widespread adoption.

Objective:To investigate the differences in clinical characteristics and prognosis between early- and late-onset rectal cancer (EORC and LORC, respectively), and to analyze the adverse factors affecting outcomes in EORC patients.Methods:This retrospective cohort and propensity score matching (PSM) study examined 904 rectal cancer patients who underwent radical resection at Peking University Shougang Hospital between 2017 and 2022. Prior to comparison, patients in the EORC group (<50 years old) and LORC group (≥50 years old) were matched at a 1:2 ratio to control for the following confounders: sex; neoadjuvant therapy; T, N, and M stage; and adjuvant treatment. Cox regression was used to identify independent risk factors for poor overall and progression-free survival (OS and PFS, respectively). Restricted cubic splines were used to analyze the association between age and clinical outcome.Results:A total of 199 EORC and 705 LORC patients were included for analysis. Prior to PSM, the proportions of patients with stage T4 [27.6%(55/199) vs.12.9%(91/705),χ 2=30.12, P<0.001] and M1 disease [24.6%(49/199) vs. 15.7% (111/705),χ 2=8.40, P=0.004], and the proportions of patients who received neoadjuvant [79.9% (159/199) vs. 62.3%(439/705), χ 2=21.54, P<0.001] and adjuvant therapy [62.8%(125/199) vs. 50.8% (358/705), χ 2=9.03, P=0.003] were significantly higher in the EORC group. Mean OS (57.8 vs. 51.9 months; P=0.011) and PFS (53.6 vs. 44.5 months; P=0.001) were also significantly longer in the LORC group. However, after PSM, the intergroup differences in OS and PFS were not significant ( P=0.450 and 0.180, respectively). Multivariate Cox regression in the EORC cohort identified carcinoembryonic antigen concentration ≥5 μg/L [hazard ratio (HR), 3.79; 95% confidence interval (CI), 1.34-10.69; P=0.012] and presence of perineural invasion (HR, 7.27; 95%CI, 1.77-29.88; P=0.006) as independent risk factors for overall mortality; the only independent risk factor for cancer progression was carcinoembryonic antigen concentration ≥5 μg/L (HR, 2.56; 95%CI, 1.06-6.17; P=0.037). Restricted cubic spline analysis showed a U-shaped relationship between age and clinical outcome. After PSM, OS and PFS did not show a significant association with age in the < 60 years old group. Conclusion:Compared with LORC, EORC is more likely to be diagnosed at a later stage and has a worse outcome. Early diagnosis and timely treatment improve outcome in EORC patients.