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*

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.

Objective:To explore the differences in active components between Hedysari Radix and Astragali Radix; To explore the material basis and therapeutic functions of Hedysari Radix in promoting blood circulation and nourishing blood.Methods:The research materials used in this study were Hedysari Radix and Astragali Radix from Wudu District, Longnan City, Gansu Province. The contents of seven resource-based components-total sugars, total polyphenols, total flavonoids, crude proteins, total saponins, total alkaloids, and total dietary fiber were measured according to standard methods. Additionally, an HPLC method was established to quantify 21 active compounds. In vitro antioxidant experiments were conducted to assess the scavenging ability of DPPH and ABTS free radicals.Results:The contents of resource-based components in Hedysari Radix were higher than in Astragali Radix. Among the 21 active components, the characteristic active components of Astragali Radix, such as calycosin, formononetin, calycosin glucoside and so on, were high in contents. The contents of paeoniflorin and Medicinol in Astragali Radix were low or not detected, and the contents in Hedysari Radix were 98.828 μg/g and 103.986 μg/g, and the antioxidant capacity was also better than Astragali Radix.Conclusions:The basic components of Hedysari Radix for promoting blood circulation and nourishing blood are paeoniflorin, Medilac, vanillic acid, ferulic acid and formononetin, which can provide a scientific basis for the determination of the characteristic components and the improvement of the main functions of Hedysari Radix.

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.

Purpose/Significance To review digital health literacy assessment tools for the elderly,and to provide a theoretical basis for assessment,intervention and optimization.Method/Process A scoping review method is used to systematically review and evaluate digital health literacy assessment tools for the elderly.Result/Conclusion The 10 included assessment tools are generally applicable to the elderly population,but research targeting specific groups remains insufficient.These assessment tools should be further integrated in the future to promote the understanding and research of digital health literacy measurement methods.

Objective:To understand the infection status of HCV and Treponema pallidum (TP) in HIV/AIDS cases in Yunnan province,and identify the risk factors. Methods:Between January 1 and June 30 in 2020,a cross-sectional survey was conducted in Yunnan. Two enzyme-linked immunosorbent assay (ELISA) kits were used to detect anti-HCV, the positive results of both two kits indicated HCV infection. ELISA and syphilis toluidine red untreated serum test were applied to identify TP infection. Both Excel 2016 and SPSS 22.0 software were used for statistical analysis, and logistic regression model was conducted to identify the relevant factors of HCV and TP infection.Results:A total of 5 922 HIV/AIDS cases were included in this study, the infection rates of HCV and TP were 6.5% (383/5 922) and 5.8% (344/5 922) respectively. The co-infection rate of HCV and TP was 0.4% (22/5 922). The risk for HCV infection in HIV/AIDS cases was higher in younger age groups compared with age group ≥50 years (15-19:a OR=3.53;20-29:a OR=3.02;30-39:a OR=2.91;40-49:a OR=3.61), in males than in females (a OR=2.31), in the married and unmarried than in the divorced or widowed (married:a OR=1.61;unmarried:a OR=1.63), in other ethnic groups than in Han ethnic group (a OR=1.70), in people with lower education level than in people with education level of college and above (primary school degree and below:a OR=4.69;middle school:a OR=3.96), in people living in the central and western Yunnan than in people living in eastern Yunnan (central Yunnan:a OR=2.46; western Yunnan:a OR=7.08), in injection drug users than in MSM (a OR=131.08). The risk of TP infection in HIV/AIDS cases was higher in people with education level of college and primary school than in middle school degree (primary school and below:a OR=1.73;college and above:a OR=1.77), in people with other occupations than in farmers (a OR=1.39), in people living in eastern Yunnan than in people living in western Yunnan (a OR=1.75); in MSM than in people with heterosex (a OR=9.75). Conclusions:A certain proportion of HIV/AIDS cases reported between January and June in 2020 in Yunnan were co-infected with HCV and TP, many factors were associated with the co-infection. It is suggested to strengthen HCV and TP tests in HIV/AIDS cases and conduct active treatment of the co-infection.

Objective: To prospective study the effectiveness and safety of multimodal analgesia (MA) in treatment of avascular necrosis of the femoral head with free vascularized fibular grafting (FVFG). Methods: Sixty patients with avascular necrosis of the femoral head, who were scheduled to unilateral primary FVFG between February 2016 and December 2016 and met the selection criteria, were included in the study. All patients were allocated to two groups according to the method of random number table: MA group ( n=30) and control group ( n=30). There was no significant difference in gender, age, body mass index, side, duration and stage of avascular necrosis of the femoral head, preoperative visual analogue scale (VAS) scores under quiescent and active states, and range of motion (ROM) of hip flexion and abduction before operation ( P>0.05). The patients in the MA group were treated with MA therapy, including oral administration of celecoxib before operation, local anesthetic wound infiltration during operation, and ice compression and oral administration of celecoxib after operation. The patients in control group were only treated with patient-controlled intravenous analgesia pump. The postoperative VAS scores under quiescent and active states, ROM of hip flexion and abduction, prescription of Tramadol and adverse reaction were recorded and compared. Results: The operations were completed successfully in both groups without obvious complications and adverse reaction. The Tramadol was used in 4 cases (13.3%) of MA group and in 11 cases (36.7%) of control group, but no significant difference was found between the two groups ( χ2=4.356, P=0.072). The VAS scores under quiescent state at 6 and 24 hours postoperatively were significantly lower in MA group than in control group ( P<0.05), while VAS scores under active state at 48 hours postoperatively and on the day of discharge were significantly lower in MA group than in control group ( P<0.05). There was no significant difference in VAS score between two groups at other time points ( P>0.05). The ROM of hip flexion in MA group was better than that in control group at 1 day postoperatively and the day of discharge ( P<0.05), while no significant difference was found at 2 and 3 days postoperatively ( P>0.05). The ROM of hip abduction in MA group was superior to the control group at 1, 2, and 3 days postoperatively and the day of discharge ( P<0.05). Conclusion: The MA can effectively relieve the pain following FVFG and facilitate early functional exercises of the hip. The usage of opioids was also relatively fewer for MA protocol.

Objective:To explore the safety and nosocomial infection control measures of COVID-19 patients of end-stage respiratory failure after lung transplantation.Methods:Lung transplantation was performed for a COVID-19 patient with end-stage respiratory failure after a negative conversion of 2019-nCoV nucleic acid. Before operation, all medical staff received simulated training on nosocomial infection. The procedures were performed in an operation room with a negative pressure environment. The three-grade preventive strategy was implemented and wearing positive pressure protective mask of electric air supply required. During operation, the patient was managed according to the in-hospital protection process. The environment and medical instruments were disinfected after operation.Results:The operation was completed successfully. The 2019-nCoV nucleic acid test was negative for many times after operation. Participants were placed in medical isolation for 14 days after surgery. During the period, nucleic acid test was negative twice.Conclusions:As an exploratory treatment, lung transplantation is a safe option for end-stage respiratory failure in COVID-19 in operation room with a negative pressure environment and implementations of three-grade preventive strategy.

Objective The prevalence of obesity is constantly increasing. Multiple metabolic complications are related to obesity, including type 2 diabetes mellitus and non-alcholic fatty liver disease(NAFLD). Our study aimed to investigate the prevalence of obesity comorbidities and its association with BMI. Methods 765 individuals who visited the multidisciplinary clinic for obesity in Peking University First Hospital from 2015, Jun. to 2018, Sept. were enrolled in this study. The height, body weight, waist circumference, hip circumference were measured during the first visit. Body adipose percentage and basal metabolic rate were recorded. Questionnaires for daily food intake, comorbidity, and lifestyle were recorded. Fasting insulin, C peptide, glucose, HbA1C , uric acid, liver enzymes and lipid profile were measured. Statistical analysis was performed using SPSS 16. 0, and P<0. 05 was considered as statistical significant. Results Daily energy intake was higher in obesity group [ obese vs non-obese, (2136.6±739.4vs1905.7±468.4)kcal/d,P=0.046].Hypertension,NAFLDandgoutriskincreasedsignificantly in obesity group (obese vs non-obese, 36.0％vs 24.5％, P=0.02;76.5％ vs 60.6％, P<0.01;6.9％ vs 1.8％, P=0.04, respectively) . Family history of obesity and diabetes increased in obesity group ( obese vs non-obese, 64.5％vs 53.6％, P=0.03;47.4％vs 37.3％, P=0.048). Fasting insulin and C-peptide levels were higher in obesity group [obese vs non-obese, (24.8 ± 15.3 vs 13.6 ± 9.5)μIU/ml, P<0.01;(3.72 ± 1.40 vs 2.70 ± 1.16)μIU/ml, P<0.01). Liver enzymes increased significantly in obesity group [obese vs non-obese, (47.2±45.4 vs 23.3±21.4)U/L, P<0.01; ( 30. 4 ± 24. 0 vs 19. 9 ± 8. 5 ) U/L, P=0. 001 ] . Conclusions Obesity population had higher risk of hypertension, NAFLD and gout. Fasting insulin, C-peptide, liver enzymes, and UA also increased significantly in these patients. It is critically important to those obese individuals for regular screening of NAFLD and diabetes mellitus.