BioMed最新文献

{"title":"Unveiling DprE1 as a Key Target in the Fight against Tuberculosis: Insights and Perspectives on Developing Novel Antimicrobial Agents","authors":"Maximilien Fil, Sandrine Alibert","doi":"10.3390/biomed4030018","DOIUrl":"https://doi.org/10.3390/biomed4030018","url":null,"abstract":"Amid the global health crisis instigated by COVID-19, the resurgence of tuberculosis (TB) has underscored the urgent need for innovative solutions. With TB claiming 1.6 million lives in 2021, it remains a formidable challenge, particularly in underdeveloped regions. Central to Mycobacterium tuberculosis (Mtb) pathogenesis is the decaprenylphosphoryl-β-D-ribose oxidase (DprE1)/decaprenylphosphoryl-2-keto-β-D-erythropentose reductase (DprE2) complex, pivotal for synthesizing decaprenylphosphoryl-arabinofuranose (DPA), a critical component of mycobacterial cell walls. DprE1 has emerged as a prime therapeutic target, with several inhibitors in clinical trials. This review elucidates the indispensability of DprE1, examines existing ligands, and delineates key considerations for the development of next-generation anti-TB therapeutics. Our analysis highlights the potential of DprE1 inhibitors to revolutionize TB treatment, emphasizing the need for continued research and development in this area to address the evolving landscape of TB and drug resistance.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"49 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141802643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing Lymph Node Involvement in Muscle-Invasive Bladder Cancer: Proposal of a Predictive Model Using Clinical Variables","authors":"W.A. Barragan Flores, C. Carrillo George, José María Sandoval, C. Cívico Sánchez, Cristina Flores, Victoria Muñoz, Tomás Fernández Aparicio","doi":"10.3390/biomed4030017","DOIUrl":"https://doi.org/10.3390/biomed4030017","url":null,"abstract":"Background: Lymph node involvement (N+) in bladder cancer indicates a poor prognosis. Current preoperative evaluations of N+ are often inaccurate. We aimed to develop a predictive model for N+ using basic clinical variables and assess the diagnostic accuracy of Computed Tomography (CT). Methods: A retrospective cohort study was conducted. We include 62 MIBC patients who underwent radical cystectomy (RC) from 2010 to 2019 in our center. We evaluated diagnostic concordance between CT and histopathology for extravesical extension (T3a≥) and N+. Univariate and multivariate logistic regressions were used to create a predictive model, with an ROC curve and nomogram developed. Results: We found 59% sensitivity and 69% specificity for CT for staging cT3≥ and a sensitivity of 22% and a specificity of 21% for N+. NLR > 2.60 (OR 6.03, p = 0.02) and lymphovascular invasion (LVInv) in the TURB sample (OR 9.26, p = 0.04) were correlated with N+. Both fundus lesions (OR 0.21, p = 0.04) and creatinine > 0.94 mg/dL (OR 0.17, p = 0.025) were associated with reduced risk. The ROC curve of the model showed 80.4% AUC. Conclusions: A predictive model with good diagnostic performance for N+ can be developed from basic clinical data. CT sensitivity and specificity for the detection of N+ patients are limited.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"51 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141660078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Prostate and Bladder Cancer Treatment: Exploring the Synergistic Potential of Entecavir and 5-Fluorouracil Combinations","authors":"Tânia Lourenço, Lara Marques, Eduarda Ribeiro, Nuno Vale","doi":"10.3390/biomed4020015","DOIUrl":"https://doi.org/10.3390/biomed4020015","url":null,"abstract":"Prostate and bladder cancer treatments have several challenges, including intense side effects and mechanisms of resistance. Thus, it is urgent to find drugs that can fill these gaps. For this purpose, Entecavir (ETV) was tested alone and in combination with 5-Fluorouracil (5-FU). Prior to this, a preliminary computational analysis was conducted to evaluate the combination of these two drugs. After exposing PC-3 and UM-UC-5 cells to the drugs, cell morphology was assessed using a microscope, while cell viability, proliferation, and cytotoxicity were evaluated using the MTT assay, and finally, the statistical analysis was performed. It was concluded that ETV showed significant cytotoxic effects in the PC-3 cells, and 5-FU, although not as effective as in other tumor types, it managed to inhibit the viability of the PC-3 cells. The combination of 5-FU with ETV after 72 h of exposure is an advantageous association, surpassing the results of each drug alone. In the UM-UC-5 cells, ETV alone did not produce the expected effect, neither did the combination. Nevertheless, repurposing ETV has proven to be an effective strategy in PC, especially through its combination with 5-FU.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"24 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Customized Lattice Structures Tailored to Mimic Patients’ Bone Anisotropic Properties and Microarchitecture for Joint Reconstruction Applications","authors":"A. El-Gizawy, Xuewei Ma, Joshua C. Arnone, A. Melaibari","doi":"10.3390/biomed4020014","DOIUrl":"https://doi.org/10.3390/biomed4020014","url":null,"abstract":"Existing implants used with Total Knee Arthroplasty (TKA), Total Hip Arthroplasty (THA), and other joint reconstruction treatments, have displayed premature failures and frequent needs for revision surgery in recent years, particularly with young active patients who represent more than 55% of all joint reconstruction patients. Bone cement and stress shielding have been identified as the major reasons for premature joint failures. A breakdown of the cement may happen, and revision surgery may be needed because of the aseptic loosening. The significant mismatch of stiffness properties of patient trabecular bones and metallic implant materials in joint reconstruction surgery results in the stress shielding phenomenon. This could lead to significant bone resorption and increased risk of bone fracture and the aseptic loosening of implants. The present project introduces an approach for development of customized cellular structures to match the mechanical properties and architecture of human trabecular bone. The present work aims at fulfilling the objectives of the introduced approach by exploring new designs of customized lattice structures and texture tailored to mimic closely patients’ bone anisotropic properties and that can incorporate an engineered biological press-fit fixation technique. The effects of various lattice design variables on the mechanical performance of the structure are examined through a systematic experimental plan using the statistical design of experiments technique and analysis of variance method. All tested lattice designs were explored under realistic geometrical, biological, and manufacturing constraints. Of the four design factors examined in this study, strut thickness was found to have the highest percent contribution (41%) regarding the structure stiffness, followed by unit cell type, and cell size. Strut shape was found to have the lowest effect with only 11% contribution. The introduced solution offers lattice structure designs that can be adjusted to match bone stiffness distribution and promote bone ingrowth and hence eliminating the phenomenon of stress shielding while incorporating biological press-fit fixation technique.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"30 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manual Reduction for Subacute Osteoporotic Burst and Severe Compression Thoracolumbar Fractures","authors":"Kung-Chia Li, Ching-Hsiang Hsieh, Ting-Hua Liao, Chih-Hung Chen","doi":"10.3390/biomed4020011","DOIUrl":"https://doi.org/10.3390/biomed4020011","url":null,"abstract":"The objective of this study was to retrospectively assess the impact of manual reduction (MR) on patients with subacute osteoporotic thoracolumbar burst fractures and severe compression fractures (OTLBFSCFs). From January 2016 to May 2020, 101 cases of OTLBFSCFs were reviewed, comprising 73 women and 28 men, with an average age of 77.4 ± 8.5 years. Preoperative radiographs, CT or MRI scans, intraoperative C-arm fluoroscopic images, and postoperative X-ray films were utilized to evaluate spinal radiographic parameters. Initially, all patients underwent 3 min of prone positioning as posture reduction (PR), followed by 1–3 sessions of six-member MR to approximate anatomical reduction of the fracture. The average preoperative anterior body height ratio (ABH%) and lateral Cobb angle (LCA) were 38.8% ± 6.2% and 22.6° ± 4.2°, respectively. Post-PR, the average ABH% and LCA were 50.5% ± 8.0% and 14.7° ± 2.7°, respectively. Following MR, the average ABH% and LCA were 99.6% ± 2.4% and 0.4° ± 2.4°, respectively. PR achieved an ABH% correction of 11.7%, while MR achieved 49.1%. LCA restoration was 7.9° with PR and 14.3° with MR. It was deduced that MR proved to be safe and efficacious for subacute OTLBFSCFs and could potentially alter the approach to subsequent surgeries.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"5 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141100085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of Laboratory Testing and Biomarker Screening for Preeclampsia","authors":"Antonia F. Oladipo, Maansi Jayade","doi":"10.3390/biomed4020010","DOIUrl":"https://doi.org/10.3390/biomed4020010","url":null,"abstract":"The purpose of this review is to elucidate the different laboratory and biomarker testing methods available for screening and diagnosis of preeclampsia. These include routine testing, such as blood pressure readings, qualitative and quantitative urine testing, complete blood count with platelets, serum creatinine levels, liver chemistries, and serum bilirubin levels. This review also details the use of non-routine testing, such as screening for angiogenic and anti-angiogenic markers, such as placental growth factor (PlGF) and soluble fms-like tyrosine kinase-1 (sFlt-1). Blood pressure measurements and proteinuria are the most routinely used screening tools used for preeclampsia and there are limited data on the utility of other screening techniques because of a greater focus on the etiology and treatment of preeclampsia. Similarly, serum angiogenic biomarkers are not routinely collected, so there is limited evidence regarding using them as screening tools for preeclampsia and more data are needed to determine their significance in the screening and diagnosis of preeclampsia.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"32 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140980243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementing A Flexible Sensor to Identify Forces during Instrument-Assisted Soft Tissue Mobilization","authors":"Nickolai J. P. Martonick, Russell T. Baker, C. McGowan","doi":"10.3390/biomed4020008","DOIUrl":"https://doi.org/10.3390/biomed4020008","url":null,"abstract":"Instrument-assisted soft tissue mobilization (IASTM) techniques use specialized hand-held instruments for applying controlled mechanical forces to the body with the goal of facilitating healing, improving range of motion, and reducing pain. Nevertheless, an optimal range of forces for achieving clinical outcomes has yet to be established. A barrier to advancing research on IASTM force optimization is the lack of commercially available instruments that quantify treatment forces. The aim of the current study was to assess the feasibility of attaching a flexible force sensor to a commercially available IASTM instrument to obtain valid force measurements. The validity of this novel approach was assessed by comparing data between the flexible force sensor and a force plate during a simulated treatment. Intraclass correlation coefficients, linear regression models, and Bland Altman plots all indicated excellent agreement between the force plate and flexible sensor when the instrument was used at 45°, 65°, and 90° treatment angles. Agreement between measures decreased when the instrument was held at 30°. Thus, commercially available instruments with attached sensors could make force measurement more accessible and feasible for a wider range of research settings, facilitating the advancement of IASTM research and ultimately informing clinical decision-making to improve patient care.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"29 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140696031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Form Matters—Technical Cues in the Single Leg Heel Raise to Failure Test Significantly Change the Outcome: A Study of Convergent Validity in Australian Football Players","authors":"Brady Green, Molly Coventry, T. Pizzari, Ebonie K. Rio, M. Murphy","doi":"10.3390/biomed4020007","DOIUrl":"https://doi.org/10.3390/biomed4020007","url":null,"abstract":"Practitioners routinely use the single leg heel raise (SLHR) to quantify calf function in healthy and injured populations. Despite this, approaches vary and the impact of cueing on SLHR performance and results interpretation in athletesis unknown. The primary aim of this study was to quantify the level of agreement of the cued versus non-cued SLHR tests. The secondary aim was to explore test outcomes and the potential impact of intrinsic factors. Cued and non-cued SLHR tests were conducted in fifty-one Australian football players (23 women, 28 men). Metronome pacing (60 bpm) and five key cues were included in the cued condition. The level of agreement (Bland–Altman) between tests was measured for capacity (repetitions to failure) and asymmetry. Data from 100 legs were included. The non-cued and cued SLHR tests demonstrated poor agreement in both capacity and asymmetry. More repetitions to failure were performed in the non-cued SLHR [Mean (SD) = 33.9 (10.3) vs. 21.9 (5.3), p < 0.001)], and men had greater capacity (36.8 (10.4) vs. 30.3 (9.2), p < 0.001). During the cued SLHR, older players (age ≥ 30 years: −5.1 repetitions, p = 0.01) and Indigenous players (−3.4 repetitions, p = 0.002) and had reduced calf muscle function. Cueing the SLHR test significantly changes the result—outcomes are not comparable or interchangeable with the commonly used non-cued SLHR. These findings can guide practitioners quantifying calf capacity.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"48 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140733472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Resilience and Sense of Coherence among Female Fibromyalgia Patients Living in a Conflict Zone Who Underwent Fibrotherapy Intervention","authors":"Liraz Cohen-Biton, Dan Buskila, Rachel Nissanholtz-Gannot","doi":"10.3390/biomed4020006","DOIUrl":"https://doi.org/10.3390/biomed4020006","url":null,"abstract":"Objective: This study sought to examine whether the sense of coherence (SoC) and resilience among female fibromyalgia (FM) patients increased after participation in a fibrotherapy intervention program (FTI) and whether SoC and resilience increased among female FM patients (FFMPs) exposed to security threats who changed their coping strategies to problem-oriented coping. Methods: Ninety-six FFMPs aged 19–75 enrolled in the FTI program led by Rabbi Firer in Sderot, Israel. The intervention program is divided into three stages, each comprising a distinct weekly treatment plan. The treatment plans encompass the following modalities: physiotherapy adapted to FM conditions, group therapy, hydrotherapy, horticultural therapy/cooking therapy, Pilates, pottery therapy, and kundalini yoga. Each stage spans a duration of 10 weeks, culminating in a total program duration of 30 weeks. Results: The findings show that after participating in FTI, the problem-orientation level of coping and health indicators, including functional ability and physiological scores (pre- and post-exertion), increased while psychological distress levels decreased. Overall, all the physiological scales measured before and after the FTI showed a significant improvement among the entire sample. FFMPs with problem-oriented strategies reported higher levels of SoC and resilience after participating in the FTI program. Conclusions: The FTI provided FFMPs with tools to understand the meaning of their disease and its management, whereas before they were preoccupied with the presence of the disease and its negative impact on their lives. The participation of FFMPs in the FTI leads to a perceptual change, the adoption of problem-oriented coping strategies, and the increased utilization of coping resources, namely, SoC and resilience. Problem-oriented coping combined with high SoC and resilience led FFMPs to adopt health strategies such as physical activity and other empowering activities that raised their physical and mental health indicators.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":" 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140216190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green Synthesis of Cocos nucifera-Based Nanomaterials and Mechanistic Basis of Their Antimicrobial Action","authors":"Zuriatou Yajeh Tanka, N. O. Ankoro, Vincent Ngouana, Franklin Loic Tchinda Taghu, Abongta Lum Mforbesi, Branly-Natalien Nguena-Dongue, Julius Nsami Ndi, Boniface Pone Kamdem, Paul Keilah Lunga, Fabrice Fekam Boyom","doi":"10.3390/biomed4010005","DOIUrl":"https://doi.org/10.3390/biomed4010005","url":null,"abstract":"Caused by pathogenic microorganisms, infectious diseases are known to cause high mortality rates, severe burdens of disability, and serious worldwide aftermaths. Drug-resistant pathogens have reduced the efficacy of available therapies against these diseases, thus accentuating the need to search for effective antimicrobials. Medicinal plants have served as starting material for the preparation of a number of antimicrobial agents. To this end, the present study highlights the green synthesis of Cocos nucifera-based nanomaterials and evaluation of the mechanistic basis of their antimicrobial action. Accordingly, Cocos nucifera extract was used for the reduction of silver nitrate solution to afford silver nanoparticles. These entities were further incorporated onto sulfuric-acid-based activated carbons to generate the nanocomposites. The antimicrobial activity of the as-prepared nanomaterials was evaluated using the broth microdilution method, while the antioxidant activity was assessed through standard methods. The cytotoxicity of potent nanomaterials was assessed on Vero cells by the spectrophotometric method. As a result, nanoparticles were successfully synthesized, as evidenced by the ultraviolet–visible spectroscopy analysis that revealed an intense absorption spectrum at 433 nm. Fourier Transform Infrared Spectroscopy presented the functional group moieties involved as a capping and reducing agent in the synthesis of the nanomaterials. The incubation of nanomaterials with selected bacterial and fungal strains has led to significant inhibitory effects of these pathogens with minimum inhibitory concentrations ranging from 7.813 to 250 μg/mL. In antioxidant assays, the nanocomposites presented scavenging activities comparable to those of ascorbic acid. Cytotoxicity experiment revealed no toxic effects on Vero cells (range of selectivity indices: from >4 to >128). These results provide evidence of the implication of Cocos nucifera-based nanomaterials in targeting bacterial or fungal systems that mediate free-radical damage or by inhibiting the oxidative damage caused by selected bacteria and fungi, the most susceptible being Escherichia coli and Candida albicans, respectively.","PeriodicalId":511609,"journal":{"name":"BioMed","volume":"43 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140260791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}