Objective To construct a dynamic prediction model for JC polyomavirus (JCV) reactivation after kidney transplantation. Methods A retrospective analysis was conducted on the clinical data of 128 recipients who met the inclusion criteria and received kidney transplantation in Nanfang Hospital, Southern Medical University, from June 2021 to December 2024. Dynamic Cox regression and dynamic restricted mean survival time (RMST) regression based on the landmark method were adopted to establish the dynamic prediction models, and Monte Carlo cross-validation was used to evaluate model performance. Results The dynamic models could predict the incidence and onset time of JCV reactivation within the subsequent 3 months according to covariates at each landmark time point from the 1st to the 6th month after transplantation. Remuzzi score, body mass index and warm ischemia time were independent risk factors for JCV reactivation, while a history of urinary BK polyomavirus reactivation served as a protective factor. The median values of the area under the curve, C-index and Brier score of the dynamic Cox model were 0.873, 0.851 and 0.065 respectively, and the C-index of the dynamic RMST model was 0.829, all of which were superior to those of the static model. Conclusions The landmark-based dynamic models exhibit excellent predictive performance, which may integrate baseline data and post-transplant follow-up information to realize dynamic assessment of the risk and time window of JCV reactivation, thereby providing evidence for optimizing post-operative monitoring and individualized intervention strategies.

To explore the clinical significance of decreased serum immunoglobulin (Ig) A levels in patients with IgG4-related disease (IgG4-RD).

Objective To analyze the characteristics of HIV-1 pretreatment drug resistance(PDR)and molecular transmission networks in Yubei District,Chongqing,providing evidence for targeted interventions.Methods Using a cross-sectional design,plasma samples were collected from HIV/AIDS patients receiving antiretroviral therapy(ART)in Yubei District from January 2022 to December 2023.Pol gene fragments were extracted and amplified for HIV-1 genotyping and drug resistance analysis.Molecular transmission networks were constructed based on genetic distance calculations.Results Among 478 HIV-1 pol sequences,eight geno-types were identified:with CRF07_BC(60.4%,289/478),CRF08_BC(15.5%,74/478),CRF01_AE(11.7%,56/478),and CRF85_BC(5.9%,28/478).The overall PDR rate was 6.3%(30/478),with resistance to nucleoside reverse transcriptase inhibitors(NRTIs)and non-nucleoside reverse transcriptase inhibitors(NNRTIs)at 1.7%(8/478)and 5.2%(25/478),respectively.No protease inhibitor(PI)resistance was de-tected.The molecular network included 177 cases(37.0%network entry rate),forming 53 clusters with 198 connections.Cluster sizes ranged from 2 to 17 nodes,and 75.3%(149/198)of connections were associated with five subdistricts/towns:Shuanglonghu Street,Huixing Street,Luoqi Town,Gulu Town,and Baoshenghu Street.Conclusion HIV-1 genotypes in Yubei District exhibit diversity and complexity,with moderate PDR prevalence.Regional clustering of transmission networks suggests the need for enhanced molecular surveil-lance and targeted interventions based on analytical findings.

Host-derived small RNAs are emerging as critical regulators in the dynamic interactions between host tissues and the microbiome, with implications for microbial pathogenesis and host defense. Among these, transfer RNA-derived small RNAs (tsRNAs) have garnered attention for their roles in modulating microbial behavior. However, the bacterial factors mediating tsRNA interaction and functionality remain poorly understood. In this study, using RNA affinity pull-down assay in combination with mass spectrometry, we identified a putative membrane-bound protein, annotated as P-type ATPase transporter (PtaT) in Fusobacterium nucleatum (Fn), which binds Fn-targeting tsRNAs in a sequence-specific manner. Through targeted mutagenesis and phenotypic characterization, we showed that in both the Fn type strain and a clinical tumor isolate, deletion of ptaT led to reduced tsRNA intake and enhanced resistance to tsRNA-induced growth inhibition. Global RNA sequencing and label-free Raman spectroscopy revealed the phenotypic differences between Fn wild type and PtaT-deficient mutant, highlighting the functional significance of PtaT in purine and pyrimidine metabolism. Furthermore, AlphaFold 3 prediction provides evidence supporting the specific binding between PtaT and Fn-targeting tsRNA. By uncovering the first RNA-binding protein in Fn implicated in growth modulation through interactions with host-derived small RNAs (sRNAs), our study offers new insights into sRNA-mediated host-pathogen interplay within the context of microbiome-host interactions.
Fusobacterium nucleatum/growth & development* ; RNA-Binding Proteins/genetics* ; Bacterial Proteins/genetics* ; RNA, Bacterial/metabolism* ; Humans ; RNA, Transfer/metabolism*

Interpreting genes of interest is essential for identifying molecular mechanisms, but acquiring such information typically involves tedious manual retrieval. To streamline this process, the fanyi package offers tools to retrieve gene information from sources like National Center for Biotechnology Information (NCBI), significantly enhancing accessibility. Additionally, understanding the latest research advancements and sharing achievements are crucial for junior researchers. However, language barriers often restrict knowledge absorption and career development. To address these challenges, we developed the fanyi package, which leverages artificial intelligence (AI)-driven online translation services to accurately translate among multiple languages. This dual functionality allows researchers to quickly capture and comprehend information, promotes a multilingual environment, and fosters innovation in academic community. Meanwhile, the translation functions are versatile and applicable beyond biomedicine research to other domains as well. The fanyi package is freely available at https://github.com/YuLab-SMU/fanyi.

Objective To investigate the effect of YTH domain family protein 2(YTHDF2)on an-giotensin Ⅱ(Ang Ⅱ)-induced hypertrophy and apoptosis of primary neonatal rat cardiomyocytes.Methods The expression level of YTHDF2 was detected in the primary neonatal rat cardiomyo-cytes with or without Ang Ⅱ stimulation(AngⅡ group and normal group).The cells were divid-ed into blank group(transfected with siRNA+PBS),siYTHDF2 group(transfected with siYTHDF2+PBS),model group(siRNA+Ang Ⅱ)and experimental group(siYTHDF2+Ang Ⅱ)to investi-gate the effects of silencing YTHDF2 on the hypertrophy and apoptosis of cardiomyocytes.West-ern blotting and RT-qPCR were used to detect the expression of YTHDF2 at protein and mRNA levels,and RT-qPCR was employed to measure the mRNA levels of myocardial hypertrophic related genes atrial natriuretic peptide(ANP),brain natriuretic peptide(BNP)and beta-myosin heavy chain(β-MHC),and cardiomyocyte apoptosis related genes Bax and B lymphocytoma 2 gene(Bcl-2).The surface area of cardiomyocytes was observed by α-actin immunofluorescence staining.Cardiomyocyte apoptosis was observed by TUNEL staining,and the binding relationship between YTHDF2 and Bcl-2 was verified by immunoprecipitation.Results The expression of YTHDF2 at protein and mRNA levels were significantly higher in the AngⅡ group than the nor-mal group(1.49±0.03 vs 0.97±0.09,1.50±0.08 vs 1.00±0.07,P＜0.05).Compared with the blank group,the surface area of cardiomyocytes was notably enlarged,apoptotic rate was obvi-ously increased,the mRNA levels of ANP,BNP,β-MHC and Bax were significantly increased,and that of Bcl-2 was remarkably decreased in the model group(P＜0.05).The experimental group obtained decreased surface area and apoptotic rate of cardiomyocytes,lower mRNA levels of ANP,BNP,β-MHC and Bax,and increased mRNA expression of Bcl-2(P＜0.05).Conclusion Silencing YTHDF2 can alleviate Ang Ⅱ-induced hypertrophy and apoptosis in primary neonatal rat cardiomyocyte,and YTHDF2 inhibits the expression of Bcl-2 by binding to it.

Objective : To investigate the effects of melatonin ( MEL) on the proliferation of hepatic stellate cells (HSCs) induced by platelet - derived growth factor (PDGF⁃BB) and explore its correlation with the regulation of autophagy levels . Methods : The HSC⁃T6 cells were divided into the following groups : control group , model group and MEL (low , medium and high) treatment groups . After 24 hours culture , the cells adhered to the wall and were changed into serum⁃free DMEM medium to synchronize the cells to the G0 stage . After 24 hours culture , all groups were given with PDGF ⁃ BB ( 10 ng/ml) excepted the control group . Besides , melatonin of different concentrations ( 1 nmol/L , 1 μmol/L and 0. 1 mmol/L) were added immediately in three treated groups . After incubated for 48 hours , the effect of MEL on the proliferation of hepatic stellate cells activated by PDGF⁃BB was detected by CCK8 method . The protein expression levels of LC3b and α ⁃SMA in hepatic stellate cells were determined by Western blot . The expression levels of LC3b mRNA and α ⁃SMA mRNA in hepatic stellate cells were determined by qRT⁃PCR . The ultrastructure of HSCs was observed by transmission electron microscopy to understand the autophagy level. Results : Compared with control group , PDGF⁃BB could induce the proliferation of HSCs ( P < 0. 01) . Compared with model group , MEL inhibited the proliferation of HSCs activated by PDGF⁃BB ( P < 0. 01) . Compared with the control group , LC3b and α ⁃SMA protein expressions significantly increased in the model group ( all P < 0. 05) , and LC3b mRNA and α ⁃SMA mRNA expressions significantly increased in the model group (P < 0. 05 , P < 0. 01) . Compared with the model group , MEL could inhibit such effects (LC3b : P < 0. 05 , P < 0. 01 ; α ⁃SMA : P < 0. 01) . Transmission electron microscopy ( TEM) showed that compared with the control group , autopolysosome significantly increased in the model group (P < 0. 05) . Compared with model group , autopolysosome significantly decreased in MEL treatment group (P < 0. 01) . Conclusion The up⁃regulation of autophagy level can promote the proliferation of hepatic stellate cells and the inhibition of hepatic stellate cell proliferation by MEL may be related to the down⁃regulation of autophagy level .

The information system of 301 Hospital One-Card service, was designed to enable outpatients to register online via mobile ends, pay in real-time, and hierarchical examination-diagnosis among other services. As the hospital HIS system cannot link to the Internet directly, the system could make use of the Internet application front end of China′s financial platform, and such means of 2D-barcodes and APP. This innovation could improve outpatient experience, keep confidential of medical information and patients′privacy, and change on-site registration to appointment in advance.

Objective To investigate the clinical efficacy and safety of topical corticosteroids as adjunctive plan in the therapy of bacterial corneal ulcers (BCU).Methods 62 eligible patients with confirmed BCU were screened and divided into 2 groups randomly.Both groups were treated with topical tobramycin for 3 weeks,the observation group received topical tobramycin for at least 48 hours and then treated with 0.02％ fluorometholone for 3 weeks,and decrement setp by step.Best spectacle corrected visual acuity(BSCVA),fluctuation of intraocular pressure (IOP) before and after therapy,time to corneal reepithelialization and clarity,severe adverse event were observed.Results After 3 weeks,BSCVA of both groups increased compared to their baselines,however,no significant difference between the two groups.Patients whose IOP exceed 21mm Hg in the control group was statistically more than that in the observation group(x2 =7.272,P ＜ 0.05).Follow up for 3 months,increasing of BSCVA in the observationgroup was significantly higher than the control group(t =2.388,P ＜ 0.05) ;and lOP of both two groups almost recuperated to baselines.Although the time to corneal reepithelialization of the control group (11.3 ± 4.5) d was shorter than observation group [(14.7 ± 5.2) d] (t =2.707,P ＜ 0.05),the recovery of corneal clarity in observation group was superior to control group (x2 =8.207,P ＜ 0.05).In addition,no severe adverse events were observed during this period.Conclusion Although prolong the healing time of corneal epithelium,corticosteroids as an adjunctive plan in the therapy of BCU may reduce immune-mediated damage,decrease scarring,control IOP fluctuation and improve BSCVA,but with no safety concerns.