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BioMed Research International

Wiley

Preprints posted in the last 90 days, ranked by how well they match BioMed Research International's content profile, based on 25 papers previously published here. The average preprint has a 0.11% match score for this journal, so anything above that is already an above-average fit.

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Eosinophil and eosinophil-derived novel leukocyte ratios are strong predictors of the severity of acute coronary syndrome patients

Chen, C.; Zhao, Z. H.; Xu, L.; Gao, J. N.; Liu, X.; Quan, X. Q.; Zhang, Y. H.

2026-02-27 emergency medicine 10.64898/2026.02.20.26346670 medRxiv
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Rapid prediction of the severity of acute coronary syndrome (ACS) is crucial for appropriate intervention in emergency department. Neutrophils (Neu), lymphocytes (Lym) and monocytes (Mon) and their ratios (Neu/Lym, NLR; Mon/Lym, MLR NeuxMon/Lym, SIRI) are acknowledged to be associated with the prediction of the severity and adverse outcome of ACS patients. Here, we analysed retrospectively eosinophils (Eos) and Eos-derived novel ratios (Neu/Eos, NER; Mon/Eos, MER; Neu x Mon/Eos, SIII; Neu/Eos x Lym, NEL; Mon/Eos x Lym, MEL; Neu x Mon/Eos x Lym, SV) of first admitted 1053 ACS patients within 24 hours of symptom onset to predict ST-segment elevation of myocardial infarction (STEMI), high Gensini score (H) and cardiac dysfunction (Killip Classification l to III grades). Results showed that Eos was significantly decreased in ST (n=227), Gensini (H) (n=311) and Killip I group (n=237) (P<0.05). All Eos-derived ratios (NER, MER, SIII, NEL, MEL, SV) were significantly higher with diagnostic severity (ST, Gensini (H), and Killip I group (P<0.05). ROC analysis revealed that SIII and SV predicted ST and Gensini (H) with high specificity and sensitivity, which were similar to that of NLR, MLR and SIRI. Conclusion: Eos and Eos-derived ratios, SIII and SV in particular, are strongly linked to the prediction of the severity of ACS, along with those of well-established leukocyte ratios. The new ratios of Eos hold significant importance in emergency department for quick evaluation of ACS patients.

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Identification of key genes involved in neuroendocrine regulation in pulpitis: bioinformatics and experimental analysis

Jin, H.; Wang, Y.; Sun, A.; Liu, Y.; Guo, T.

2026-04-20 dentistry and oral medicine 10.64898/2026.04.18.26351158 medRxiv
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BackgroundThere is a close correlation between neuroendocrine regulation and pulpitis progression. This study aims to identify key neuroendocrine regulation-related genes in pulpitis, providing insights for its treatment. MethodsGSE77459 and GSE92681 datasets were used to validate experimental findings. Key neuroendocrine regulation-related genes were identified via Cytoscape plugin cytoHubba and expression validation. Gene set enrichment analysis, RNA-binding protein regulatory networks, post-translational modifications, molecular regulatory networks, and drug prediction were performed. Key gene expression was experimentally verified in clinical samples. ResultsTop 10 genes were obtained via cytoHubba; 4 (IL6R, OSM, IL1RN, CCL4) with significant differences between pulpitis and control samples and consistent trends in both datasets were identified as key genes. Gene set enrichment analysis showed key genes participate in pathways like cytokine-cytokine receptor interaction. Related RNA-binding proteins were ELAVL1 and HNRNPA1, with phosphorylation as the main post-translational modification. Core regulatory microRNAs included miR-519, miR-765, miR-23, and regulatory factors included FOXC1, PRRX2. Targeted drugs (e.g., sarilumab, haloperidol decanoate, cyclosporine) were predicted, and clinical sample verification confirmed consistent expression trends. Conclusion4 key neuroendocrine regulation-related genes were identified, which may have clinical significance for the diagnosis and treatment of pulpitis.

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Comparative Transcriptomic Analysis of ATRA-Resistant and ATRA-Sensitive APL Cell Lines Identifies LncRNA Biomarkers Associated with Drug Resistance

Marimuthu, O.; Shinde, N.; Sella, R. N.

2026-01-30 cancer biology 10.64898/2026.01.27.702191 medRxiv
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Acute promyelocytic leukemia is a distinct subtype of acute myeloid leukemia characterized by the t(15;17) translocation, leading to the PML (Promyelocytic leukemia protein)-RARA (Retinoic Acid Receptor Alpha) fusion protein. Although PML-RARA fusion is common, there are 20 more fusion events also reported in APL. All -trans retinoic acid (ATRA) is a standard drug for APL, leading to significant improvement in patient outcomes; nevertheless, a small fraction of patients still experience relapse, and some patients exhibit resistance to the drug. Long non-coding RNAs (LncRNAs) are recognized as promising biomarkers for cancer diagnosis, prognosis, and treatment response. In this study, we used ATRA-Resistant (AP1060) and ATRA -Sensitive (NB4), both treated and untreated cell line transcriptomic data retrieved from the NCBI Gene Expression Omnibus(GEO) database to perform transcriptomic analysis with bioinformatic tools. We utilized the LncRAnalyzer pipeline to predict the lncRNAs, followed by differential expression analysis using DESeq2. Weighted Gene Co-expression Network Analysis (WGCNA) was employed to construct lncRNA co-expression modules associated with ATRA resistance. BEDTools is used to identify cis-acting target genes of lncRNAs.LncRNA -miRNA sponging identified by miRanda algorithm. The identified miRNAs reveal their significant role in APL and other leukemia subtypes. The results of the study show that the identified lncRNAs from the miRNA-LncRNA network are promising biomarkers for ATRA resistance.

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Three Distinct Trajectories of Red Blood Cell Distribution Width and Their Significant Association with Mortality in Sepsis Patients: A Group-Based Trajectory Modeling Study with Validation

Cai, L.; Hua, Y.; Lu, W.; Bing, h.; Gao, q.; Zhang, W.

2026-02-28 emergency medicine 10.64898/2026.02.25.26347114 medRxiv
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The red cell distribution width (RDW) is a recognized prognostic marker in sepsis, yet its dynamic changes over time and their relationship with outcomes remain unexplored. This study aimed to identify distinct RDW trajectories during the early phase of sepsis and evaluate their association with mortality. We conducted a retrospective cohort study using data from the MIMIC-IV database (n=3,813) as the derivation cohort and from the First Affiliated Hospital of Kunming Medical University (n=467) for external validation. Sepsis patients with at least seven RDW measurements within the first ten days of hospitalization were included. Group-based trajectory modeling (GBTM) was employed to identify RDW trajectories. A three-trajectory model was selected based on model fit indices and clinical interpretability: Trajectory 1 (Slow-Decrease, 32.97%), Trajectory 2 (Slow-Increase, 43.30%), and Trajectory 3 (Fluctuating-Rapid Decrease, 23.73%). In the our study, Cox models adjusted for confounders revealed that, compared to Trajectory 1, Trajectory 3 was independently associated with significantly increased 30-day (HR 1.47, 95% CI 1.17-1.84) and 90-day mortality (HR 1.54, 95% CI 1.25-1.88). Conversely, Trajectory 2 was associated with the most favorable survival rates. Kaplan-Meier analysis consistently showed the highest mortality in the Trajectory 3 group. External validation confirmed the models robustness and the consistent prognostic value of the identified trajectories. We conclude that dynamic RDW trajectories, readily identifiable from routine clinical data, provide significant prognostic information beyond single-time-point measurements and can aid in the risk stratification of sepsis patients.

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Hematological and genetic basis of clinical heterogeneity of HemoglobinE/β-thalassemia

Noor, F. A.; Hossain, M.; Sarker, S. K.; Arafath, K.; Ety, S. S.; Maisha, J. A.; Mahmud-Un-Nabi, M. A.; Bhuyan, G. S.; Sultana, N.; Hossain, A. K. M. E.; Khan, W. A. K.; Shekhor, H. U.; Qadri, F.; Mannoor, K.

2026-02-23 genetics 10.64898/2026.02.22.707245 medRxiv
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Patients with HbE/{beta}-thalassemia inheriting the same {beta}-globin mutations display varied clinical manifestations, the mechanism of which is only partially known. The study aimed to decipher the heterogenous basis of HbE/{beta}-thalassemia patients in more details by focusing on both hematological and genetic modifiers influencing the disease severity, which included-(i) HbF and HbE levels using Hb electrophoresis, (ii) {beta}-thalassemia mutations, (iii) anti3.7triplication using Gap-PCR, (iv) individual and cumulative effects of HbF-inducing SNPs in 4 major modifier genes, namely HBG2, BCL11A, HBSB1L_MYB intergenic-region, and HBBP1 which were genotyped using DNA sequencing and Real-time PCR-HRM methods. Accordingly, 130 diagnosed Bangladeshi patients with HbE/{beta}-thalassemia were enrolled and categorized as mild, moderate, and severe as per Mahidol scoring system. c.79G>A+IVS1_5G>C was the most predominant (73.8% of total) mutation pair across all the 3 severity groups, indicating secondary modifiers might influence the severity. Our study found both HbF and HbE protective to HbE/{beta}-thalassemia, as both were inversely related to the severity score (HbF: p<0.0001/r=-0.55; HbE: p<0.0001/r=-0.56). Four SNPs-XmnI-G{gamma}, rs2071348 (HBBP1), rs489544 and rs28384513 (HBS1L_MYB) showed significant association with the elevated HbF levels (p=0.005, 0.0001, 0.0001, 0.004 respectively). The multivariate analysis showed that the risk genotypes with single or combination of 2, 3,and 4 SNPs showed gradually increased risk [Odd Ratio (95%CI)= 2.51, 5.47, 19.5, 39.0, respectively] of less severe phenotype, suggesting that these linked SNP variants had a cumulative effect on both HbF level and clinical severity score. However, low HbE level and copresence of anti3.7triplication were found to nullify the ameliorating effect of multiple SNPs.

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The efficacy and safety of argatroban with clopidogrel versus aspirin with clopidogrel for acute minor ischemic stroke (ACAP): study protocol for a multicenter, randomized controlled trial

Zhang, H.; Ma, X.; Xiao, Y.; Liao, G.; Kong, N.; Qin, T.; Huang, M.; Yin, Z.; Chen, W.; Wu, J.; Xian, J.; Fu, J.; Xie, F.; Jin, C.; Liao, Z.; Liang, W.; Lin, L.; Xian, W.; Nguyen, T. N.; Wang, D.; Zhong, W.

2026-03-31 neurology 10.64898/2026.03.30.26349790 medRxiv
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Background: Previous studies have shown the benefit of dual antiplatelet therapy (DAPT) for acute minor ischemic stroke. Argatroban, is a thrombin inhibitor and is primarily used in patients with acute ischemic stroke experiencing early neurological deterioration. There is no study about the benefit of antiplatelet plus anticoagulant in this population. We aim to study the difference between the combination of argatroban and clopidogrel and DAPT in the outcomes of patients with acute minor ischemic stroke (AMIS, NIHSS <5) presenting within 72 hours after onset. Methods: Argatroban combined with clopidogrel versus aspirin combined with clopidogrel in Stroke (ACAP study) is an investigator-initiated, multicenter, prospective, randomized, open-label trial with blinded endpoint evaluation conducted at four centers in China. This trial will randomize 464 eligible patients with minor ischemic stroke of NIHSS 5 (232 in each arm) within 72 hours of the last known well to receive intravenous argatroban with clopidogrel (treatment group) or aspirin plus clopidogrel (control group). The primary outcome is the proportion of patients achieving excellent outcome, defined as a score of 0-1 on the modified Rankin scale, at 90 days. Conclusions: The ACAP trial will provide important data on the role of intravenous argatroban in patients with acute minor ischemic stroke presenting within 72 hours of last known well.

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A crucial role for PIH1D1 in modulating p53 stability via the R2TP complex

Singh, D. K.; Akhtar, Q.; Mir, R. A.

2026-02-09 biochemistry 10.64898/2026.02.07.704515 medRxiv
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The R2TP is a multimeric protein complex consists of RUVBL1, RUVBL2, PIH1D1, and RPAP3, and it is known to functions as a specialized co-chaperone. We hypothesize that PIH1D1 recognizes p53 and stabilizes it via R2TP complex. Upon successful completion of this study, innovative mechanism has been found for the interaction and stabilization of p53 and hence govern the cell cycle. Upon interaction between p53 and PIH1D1 protein, p53 is stabilized by PIH1D1 protein, without affecting its C-terminal domain. We have also observed that p53 protein levels were affected after the alteration in expression levels of PIH1D1. Based on the finding, we suggest that the R2TP complex stabilizes and regulates P53. Therefore, this novel method will work as a flashpoint to restore the function of p53 in cancer cells, controlling cancer and cell cycle progression.

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Oral Hygiene Practices and Dental Caries Experience in Nigeria: A Systematic Review and Meta-Analysis

Aborisade, A.; Mohammed Ali, A.; Okolo, C.; Gbaja-Biamila, T. A.; Akinsolu, F. T.; Salako, A. O.; Adewole, I. E.; Olagunju, M. T.; Abodurin, O. R.; Eleje, G. U.; Nwaozuru, U. C.; Ehizele, A. O.; Lusher, J. M.; El Tantawi, M.; Folayan, M. O.

2026-01-30 dentistry and oral medicine 10.64898/2026.01.30.26345076 medRxiv
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BackgroundOral hygiene is linked with dental caries experience. This systematic review and meta-analysis assessed the associations between oral hygiene status, the frequency of tooth brushing, and the prevalence of dental caries in Nigeria. Tools used for maintaining oral hygiene were also identified. MethodsRegistered with PROSPERO (CRD42022367763), this review searched PubMed, Web of Science, Scopus, African Journals Online, African Index Medicus, and Google Scholar in January 2026. Observational studies and clinical trials reporting baseline caries prevalence were included. There was no language restriction. Studies were excluded if they did not provide information on the sample size, had no study outcome data, or featured duplicate samples, and if they were review articles, systematic reviews and meta-analyses, case reports, case series, in vitro studies, commentaries/letters (editorials, opinion pieces) devoid of primary data. Pooled odds ratios (ORs) were estimated using random-effects models. Subgroup analyses were conducted by dentition type, geopolitical zone, study design, publication year, mean age, and sample size. ResultsTwenty-three cross-sectional studies were included, of which 20 (86.9%) were conducted in Southern Nigeria. After removing an influential outlier, poor oral hygiene was associated with a 38% reduction in caries odds (OR 0.62, 95% CI 0.46-0.84). Brushing at least twice daily was strongly associated with reduced caries (OR 0.01, 95% CI 0.00-0.01). No significant association was found between the type of cleaning device and caries prevalence. Subgroup analyses identified dentition type and publication year as significant moderators. Heterogeneity ranged from low to moderate, and no publication bias was detected for primary associations. The most common cleaning tool was a toothbrush with toothpaste, though chewing sticks, cotton wool, and other traditional tools were also reported. ConclusionTwice-daily tooth brushing is strongly associated with lower caries prevalence in Nigeria. Poor oral hygiene was linked to reduced caries odds in pooled analysis, a finding that may reflect socio-economic and dietary confounding. The type of cleaning tool was not significantly associated with caries risk, highlighting the importance of brushing frequency and technique over tool type. Future research should prioritize Northern Nigeria to address the geographic skewness of the data and improve national representativeness.

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Living Kidney Donation in Brazil (2010-2023): An Ecological Time-Series of Donor-Recipient Relationship, Waiting List, and Hospital Indicators Compared with Deceased Donation

Convento, M. B.; Borges, F. T.

2026-02-10 nephrology 10.64898/2026.02.08.26345842 medRxiv
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IntroductionChronic kidney disease imposes a high clinical and economic burden on the Brazilian Unified Health System, and kidney transplantation offers the best prognosis. ObjectiveTo describe trends in living kidney (LD) donation in Brazil (2010-2023), analyzing the donor-recipient relationship and the operational stock-to-annual production ratio on the waiting list, and to compare hospital indicators and estimated patient and graft survival between LD and deceased-donor (DD) kidney transplants. MethodsDescriptive ecological time-series study using aggregated, publicly available data. ResultsThe waiting list increased by 15% (from 33,253 to 38,258), and the total number of transplants rose by 29% (from 4,656 to 6,047). Data showed an increase in deceased-donor transplants (from 3,001 to 5,189) and a decrease in LD transplants (from 1,655 to 858), with the LD share declining from 35.55% to 14.19% and the per-million-population rate falling from 8.8 to 4.2. Among LD, there was a relative decrease in related donors (from 82.80% to 71.21%), a relative increase in unrelated spouse donors (from 10.57% to 18.65%), and in other unrelated donors (from 6.63% to 10.14%). Comparatively, LD showed better descriptive performance on survival indicators and lower in-hospital mortality, length of stay, and mean Hospital Admission Authorization value. ConclusionThe findings indicate a need for strategies to sustain DD procurement and LD donation.

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Red/near-infrared light activates the mitochondrial large-conductance calcium-activated potassium channel in glioblastoma cells.

Bednarczyk, P.; Lewandowska, J.; Kulawiak, B.; Szewczyk, A.

2026-04-05 biochemistry 10.64898/2026.04.02.716077 medRxiv
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Mitochondrial potassium channels, located in the inner mitochondrial membrane, play a crucial role in the cells life/death phenomenon. Activation of mitochondrial potassium channels by potassium channel openers may protect cells against ischemia-reperfusion injury. It is known that mitochondrial large conductance calcium-activated potassium channels interact with various mitochondrial proteins, including enzymes of the respiratory chain. Numerous studies indicate that the mitochondria, especially cytochrome c oxidase, play a crucial role as a chromatophore in the cellular response to red and near-infrared light. In this study, we employ the patch-clamp technique and single-channel recordings to investigate the regulation of glioblastoma mitochondrial large conductance calcium-activated potassium channel activity by infrared light. Specifically, we examined the effects of wavelengths 620 nm, 680 nm, 760 nm, and 820 nm in a redox-controlled environment. Our findings suggest that illuminating the inner mitochondrial membrane with these wavelengths may activate mitochondrial large conductance calcium-activated potassium channels. These results offer new insights into the regulation of mitochondrial potassium channels by cytochrome c oxidase, which may lead to the development of non-pharmacological interventions with potential cytoprotective benefits.

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N-3 Polyunsaturated Fatty Acids Ameliorate Post-infarction Cardiac Dysfunction Through Modulation Of Adiponectin-Ceramide Metabolism

Liu, Y.; Sun, W.; Liu, J.; Wu, H.; Liu, P.; Chen, Y.; Zhang, R.; Chen, W.; Wang, S.; Guo, X.; Zhang, W.; Cao, L.

2026-04-16 pharmacology and toxicology 10.64898/2026.04.13.718333 medRxiv
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BackgroundIt has been shown that n-3 polyunsaturated fatty acids (n-3 PUFA) of marine origin exert significant beneficial effects on myocardial infarction (MI); however, the underlying mechanisms remained unclear. Ceramides play a vital role in the regulation of energy metabolism, mitochondrial function, and apoptosis. Through the integration of clincial studies and animal experiments, this study aimed to determine whether n-3 PUFA improved myocardial function by modulating ceramide metabolism. MethodsIn a case-control study, 100 patients with AMI and 100 healthy pariticipants were enrolled to measure serum ceramide concentrations. Meanwhile, mice were randomly allocated into 4 groups and administrated to a 3-week intervention with n-3 PUFA in triglyceride and phospholipid forms. A mouse model of MI was then established, followed by an additional 4 weeks of continuous intervention. Subsequent comprehensive assessments of cardiac function were performed in the mice. Finally, the mice were euthanized to conduct targeted ceramide lipidomic analysis and other relevant assays. ResultsThe levels of serum C16:0-, C18:0-, C20:0-, C24:1-ceramides and total ceramides in patients with acute myocardial infarction (AMI) were significantly higher compared with the healthy controls. In the murine model of myocardial infarction, pathological analysis via TTC staining demonstrated that interventions with fish oil (triglyceride form) and krill oil (phospholipid form) both significantly reduced myocardial infarct size. Concomitant echocardiographic assessment confirmed that both treatments markedly elevated left ventricular ejection fraction (LVEF), with the magnitude of improvement being significantly superior to that of the model control group. Concurrently, compared with the model group, the concentrations of ceramides in cardiac tissue and serum were significantly lower in the groups with fish oil and krill oil intervention. Western blot analysis further confirmed that n-3 PUFA intervention upregulated adiponectin expression, reduced ceramide accumulation in myocardial tissue, and inhibited mitochondria-mediated cardiomyocyte apoptosis, thereby improving cardiac function and prognosis following myocardial infarction. ConclusionsThis work demonstrates that n-3 PUFA exert cardioprotective effects following MI mediated by adiponectin-ceramide axis. However, there is no significant difference regarding therapeutic efficacy of n-3 PUFA in triglyceride or phospholipid forms.

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Comparison of anxiety and satisfaction levels in patients undergoing digital versus conventional dental impressions

Farfan, M. E.; Pinzon, A. P.; Armijos Briones, M.

2026-02-06 dentistry and oral medicine 10.64898/2026.02.05.26345703 medRxiv
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Dental impressions are a routine component of prosthodontic care, yet the patient experience may vary depending on the technique used. This study compared dental anxiety and satisfaction among patients undergoing digital versus conventional impressions in a postgraduate clinical setting at the Universidad de Especialidades Espiritu Santo. A total of 85 adult patients were included: 44 received conventional impressions and 41 received digital impressions. Dental anxiety was assessed using the Modified Dental Anxiety Scale (MDAS) before the procedure, and satisfaction was evaluated using a Visual Analog Scale (VAS) immediately after the procedure. Anxiety scores did not differ significantly between groups (p = 0.232). However, patients in the digital group reported significantly greater satisfaction than those in the conventional group (p < 0.001). These findings suggest an association between the use of digital impression techniques and higher levels of patient satisfaction, while no significant association was observed between impression technique and dental anxiety.

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Comparative Effects Of Flaxseed Supplementation On Hematological Parameters, Lipid Profile And Immunity Of Male Rabbit

Kanwal, A.; Iqbal, R.; Farhan, F.; Kanwal, A.

2026-04-08 zoology 10.64898/2026.04.06.716729 medRxiv
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Flaxseeds have high nutritive value due to the presence of proteins, lignins (SDG), fatty acids, vitamins, dietary fibers, minerals and carbohydrates. This research was conducted to evaluate the effect of distinct doses of flaxseeds on hematological parameters, immunity and lipid profile of male rabbit. In this research, 60 male rabbits were isolated into four groups, three treatment groups T1, T2 and T3 and a control group T0, with 15 rabbits in each group. The treatment groups were given 4%, 6% and 8% of flaxseeds per daily diet for 45 days. On 15th, 30th and 45th day of experiment, blood samples were collected to examine their hematological parameters. Serum was separated from the collected blood sample to perform ELISA and serum lipid profile test to assess antibody titer and lipid profile of the rabbits respectively. The results indicated a significant reduction in TC, TG, and LDL-C levels in contrast to HDL-C which increased significantly in all treatment groups. Whereas, the statistical analysis of hematological parameters showed an HSD (p[&le;]0.05) in flaxseed treated groups. A maximum level of Hb, WBCs, RBCs, MCHC, MCV, HCT, MCH and differential leukocytes count was recorded in high dose group T3 (8% flaxseeds) followed by medium dose group T2 (6% flaxseeds) and low dose group T1 (4% flaxseeds) respectively. There was a significant rise in antibody titer (p[&le;]0.05) against RHDV (Rabbit Hemorrhagic Disease Virus) comparable to non-treated group. The outcomes illustrated that flaxseeds as nutritional supplement are undoubtedly beneficial to health and prevent various diseases. Study contributionThis research specifically explores how dietary supplementation with flaxseeds, a widely recognized source of omega-3 fatty acids, fiber, and antioxidants, can influence metabolic health and immune function. These findings have significant implications for nutritional interventions aimed at improving cardiovascular health, immune support, and overall well-being, making it highly relevant to the journals readership. The aim of this study was to investigates the dose-dependent effect of flaxseeds on hematological parameters, lipid profile and immunity of male rabbits. Using a controlled experimental design, male rabbits were fed a diet supplemented with varying doses of flaxseeds over a period of 45 days. Key parameters such as total cholesterol, triglycerides, LDL-C, HDL-C, antibody titer, red, white blood cell, platelet counts, Hb, HCT, MCV. MCHC, MCH and differential leukocytes levels were measured to assess the impact of flaxseeds. The results demonstrated that flaxseed supplementation significantly restored lipid profiles by reducing total cholesterol and triglycerides, LDL-C and increasing HDL-C while also enhancing immune function by rising antibody titer and maintaining healthy blood profiles in the subjects.

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Association between fluoridated toothpaste use and dental caries in Nigeria: A systematic review and meta-analysis

Aborisade, A.; Ali, A. M.; Amedari, M.; Salako, A. O.; Akinsolu, F. T.; Abodunrin, O. R.; Ola, O. M.; Olagunju, M. T.; Eleje, G. U.; Lusher, J.; Ezechi, O. C.; Folayan, M. O.

2026-02-28 dentistry and oral medicine 10.64898/2026.02.27.26346208 medRxiv
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BackgroundThe use of fluoride-containing dentifrices can reduce the risk of dental caries. The systematic review was conducted to address two research questions: (i) the prevalence and frequency of fluoridated toothpaste use among Nigerian children and adolescents across geographic and demographic settings, and (ii) its association with dental caries prevalence, stratified by location and baseline caries risk. MethodsThis systematic review, registered with PROSPERO (CRD42022362116), followed the PRISMA guidelines. A PIO framework was applied to include children and adolescents (6 months-19 years) in Nigeria using fluoridated toothpaste, with caries outcomes measured via dmft/DMFT indices. A comprehensive search of PubMed, Web of Science, Scopus, Embase, AJOL, and Google Scholar was conducted from January 2001 to January 2026, supplemented by reference and grey literature searches. Study selection, data extraction, and risk of bias assessment using an adapted Hoy et al. tool were performed independently by multiple reviewers, with high inter-rater reliability (Kappa=0.90). Data were pooled using a random-effects model, with sensitivity, subgroup, and meta-regression analyses conducted to explore heterogeneity and effect modifiers. Publication bias was assessed using funnel plots and Eggers test. ResultsOf 1,194 identified records, 18 studies (n=12,719 participants) were included. The use of fluoridated toothpaste was widespread (prevalence: 61.9% to 95.8%), yet its association with dental caries varied significantly by location. A meta-analysis of 14 studies indicated a significant 16% reduction in caries odds with fluoridated toothpaste use after removal of an influential outlier (OR = 0.84, 95% CI: 0.71-0.99, p=0.04). Subgroup analyses revealed this protective association was significant in urban and rural settings (p<0.05) but absent in suburban Nigeria. Furthermore, dental caries prevalence and severity (DMFT/dmft) were substantially higher in urban and rural areas, where the association was significant, compared to suburban regions. All studies were assessed as having a low risk of bias, and no significant publication bias was detected. ConclusionFluoridated toothpaste is widely used in Nigeria and associated with a reduction in the prevalence of dental caries in Nigeria. It appears the relationship is moderated by residential location, and the DMFT/dmft. Longitudinal studies are needed to explore the interactions between the DMFT/dmft, use of fluoridated toothpaste, and residential location in Nigeria.

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Parakinesia Brachialis Oscitans and Post-Stroke Motor Recovery: A Propensity Score-Matched Cohort Study

Wang, C.-c.; Wang, R.; Hu, H.; Su, Z.; Guo, S.; Tian, X.

2026-02-02 neurology 10.64898/2026.01.29.26345175 medRxiv
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ObjectiveA comparative analysis was conducted on the rehabilitation effects of limb functions in patients with post-stroke yawning-induced parakinesia brachialis oscitansysis (PBO), patients without PBO, and patients whose PBO naturally disappeared after the onset of the disease. MethodsThe study included ischemic stroke patients diagnosed and treated in our hospital from March 2024 to June 2024. Patients were divided into two groups: the PBO group and the non-PBO group, based on whether PBO was administered. Propensity score matching was employed to account for all covariates and perform a 1:2 matching to balance the baseline characteristics of the two groups. The matched data were used for subsequent analysis to observe the Lovett scores and FMA scores of the two groups 3 months after the onset. For 33 patients with PBO, they were divided into two groups: the persistent group and the disappearing group, based on whether the PBO lasted for more than 1 month. The Lovett scores and FMA scores of the two groups were observed 3 months after the onset. ResultsAfter propensity score matching, there were 26 patients in the PBO group and 52 patients in the non-PBO group. The baseline characteristics of the two groups were basically balanced, and the difference was not statistically significant (P>0.05). Compared with the non-PBO group, the Lovett scores and FMA scores of the PBO group 3 months after the onset were higher, and the difference was statistically significant (P < 0.05). Compared with the PBO persistent group, the FMA score of the PBO disappearing group 3 months after the onset was higher than that of the persistent group, and the difference was statistically significant (P < 0.05). There was no statistically significant difference in Lovett muscle strength between the two groups (P > 0.05). ConclusionThe functional recovery of patients with PBO was better than that of patients without PBO manifestation 3 months after the initial diagnosis. Moreover, patients whose PBO appeared first and then disappeared had better functional recovery than those whose PBO persisted.

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Efficacy Of Connective Tissue Graft Versus Titanium Papillary Inserts in the Surgical Reconstruction of Interdental Papilla: A Randomized Controlled Clinical Trial

Nagar, S. S.; Chandra, R. V.; Aileni, A. R.; Goud, V. S.

2026-03-04 dentistry and oral medicine 10.64898/2026.02.26.26345466 medRxiv
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Aim and ObjectivesThe study aimed to evaluate the effectiveness of titanium inserts for interdental papilla reconstruction, comparing it with the Han and Takei technique using subepithelial connective tissue grafts. The objectives included assessing the black triangle height, papilla height and papilla presence index (PPI) at baseline, 1 month and 3 months postoperatively along with the evaluation of Early Wound Healing Score (EHS) during the first week of post operative healing period. Patients and MethodsThis single-blind randomized clinical trial included systemically healthy individuals aged 18-35 years with Nordland and Tarnows Class I-III papillary loss. A total of 18 participants were randomly assigned to either test group or control group. Clinical parameters were measured pre- and post-operatively at specified intervals. Both groups received standard presurgical care and postoperative follow-up. The surgical protocol for the test group involved titanium insert placement in the interdental bone, while the control group received a connective tissue graft using the Han and Takei method. ResultsBoth groups showed significant intragroup improvements in all parameters from baseline to 1 and 3 months (p<0.05). However, intergroup comparisons showed no significant differences at most time points, except at 3 months for PPI, where the control group showed significantly better results (p=0.04). EHS scores were not significant between the groups. ConclusionTitanium inserts and CTG both demonstrated clinical effectiveness in enhancing interdental papilla dimensions. These findings support the titanium insert as a viable, less invasive alternative, offering clinicians a practical option for esthetic papilla reconstruction.

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A Randomized, Double-blind, Placebo-controlled, Multicenter Clinical Study of Chuanzhi Tongluo Capsule in Acute Ischemic Stroke (CONCERN): Study Rationale and Design

Yang, D.; Li, G.; Song, J.; Shi, X.; Xu, X.; Ma, J.; Guo, C.; Liu, C.; Yang, J.; Li, F.; Zhu, Y.; Zi, W.; Ding, Q.; Chen, Y.

2026-04-23 neurology 10.64898/2026.04.20.26351260 medRxiv
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Abstract Background: Acute ischemic stroke (AIS) remains a significant cause of disability worldwide. Current treatments, primarily intravenous thrombolysis (IVT), are limited by narrow time windows and reperfusion injury, leading to suboptimal outcomes for many patients. Chuanzhi Tongluo (CZTL), a traditional Chinese medicine, has been preliminarily recognized as a novel cerebral protection agent in animal models. Objectives: This trial investigates the efficacy and safety of CZTL capsule in patients with AIS who are not eligible for IVT or who experience early neurological deterioration after IVT. Methods and design: The CONCERN trial is an investigator-initiated, prospective, multicenter, double-blind, parallel-control, randomized clinical study in China. An estimated 1,208 eligible participants will be consecutively randomized to receive CZTL capsule therapy or placebo in 1:1 ratio across approximately 70 stroke centers in China. All enrolled patients are orally administered 2 capsules of CZTL or placebo 3 times a day together with antiplatelet agents for 3 months. Outcomes: The primary endpoint is an excellent functional outcome, defined as a score of 0 or 1 on the mRS at 90 days. Lead safety endpoints included 90-day mortality and symptomatic intracranial hemorrhage within 48 hours. Conclusions: Results of CONCERN trial will determine the clinical efficacy and safety of the traditional Chinese medicine CZTL capsule in the treatment of AIS patients. Trial registry number: ChiCTR2300074147 (www.chictr.org.cn).

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ECG spectrogram-based deep learning model to predict deterioration of patients with early sepsis at the emergency department: a study from the Acutelines data- and biobank

van Wijk, R. J.; Schoonhoven, A. D.; de Vree, L.; Ter Horst, S.; Gaidhane, C.; Alcaraz, J. M. L.; Strodthoff, N.; ter Maaten, J. C.; Bouma, H. R.; Li, J.

2026-03-27 emergency medicine 10.64898/2026.03.26.26349371 medRxiv
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Purpose: Early recognition of deterioration in patients with suspected infection at the emergency department (ED) is important. Current clinical scoring systems show limited discriminative performance for early deterioration. Continuous electrocardiogram (ECG) recordings may offer additional dynamic physiological information that can enhance early prediction of deterioration in patients with suspected infection. Methods: We developed a multimodal, ECG-derived spectrogram-based pipeline to predict deterioration within 48 hours of ED admission. We used the first 20 minutes of ECG recordings for the spectrograms. We compared the model with the National Early Warning Score (NEWS), quick Sequential Organ Failure Assessment (qSOFA), a baseline model with vital parameters, sex, and age, and a Heart Rate Variability (HRV) derived model. Results: In this study, 1321 patients were included, of whom 159 (12%) deteriorated. The multimodal model combining baseline data with spectrograms showed the best overall performance, with an Area Under the Receiver Operating Characteristic (AUROC) of 0.788, followed by the baseline model (age, sex, triage vitals) alone, with an AUROC of 0.730. The HRV-only model and the qSOFA showed the lowest performance (AUROC 0.585 and 0.693, respectively). Conclusion: This study shows that ECG-derived multimodal spectrogram models outperform those based solely on vital signs and HRV features, as well as established clinical scores such as NEWS and qSOFA. Spectrogram analysis represents a promising approach to enhance early risk stratification and support clinical decision-making for patients with suspicion of infection in the ED.

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Dynamics Of C-Reactive Protein In The Early Postoperative Period As A Predictor Of Infectious Complications And A Tool For Optimizing Antibiotic Therapy

Ochakovskaya, I. N.; Onopriev, V. V.; Dovlatbekyan, N. M.; Zhuravleva, K. S.; Zamulin, G. Y.; Durleshter, V. M.

2026-04-07 infectious diseases 10.64898/2026.04.06.26350253 medRxiv
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Objective. To evaluate the diagnostic and prognostic significance of C reactive protein (CRP) level dynamics within the first five days after surgery for the early detection of surgical site infections (SSI) and to identify independent risk factors, taking into account regional specifics of surgical management (types of surgeries, duration of procedures), as well as the local hospital microbial landscape. Materials and Methods. A single-center retrospective cohort analysis of data from 127 patients who underwent surgical procedures between 2022 and 2024 was conducted. CRP levels on postoperative days 1, 3, and 5 were assessed, and delta values were calculated. Descriptive statistics, ROC analysis, and multivariate logistic regression were used to identify predictors of SSI. Results. Patients with SSI lacked the physiological decrease in CRP levels by day 5. The most informative indicator was the CRP level on day 3: a threshold of >106 mg/L was associated with a high risk of SSI (AUC=0.76; sensitivity 85%, specificity 63%). Independent predictors of SSI included surgery duration (OR=1.015 per 1 min; p<0.001) and the increase in CRP between days 3 and 5 (delta CRP3-5: OR=1.027; p=0.023). A combined model (clinical parameters + CRP) demonstrated the highest predictive ability (AUC=0.79). Conclusion. Monitoring CRP dynamics, particularly on days 3 and 5, is a highly informative and accessible method for the early diagnosis of SSI. A CRP threshold of >100 mg/L on day 3 and its subsequent increase should serve as a trigger for in-depth diagnostic investigation and rationalization of antimicrobial therapy. Keywords: C reactive protein, postoperative complications, surgical site infection, antibiotic therapy, predictive factors, diagnosis

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Smartphones vs DSLR Cameras in Dental Photography: An In Vitro Assessment of Linear Dimensional Shift in the Esthetic Zone

Boontharak, A.; Amornsettachai, P.; Visuttiwattanakorn, S.

2026-03-24 dentistry and oral medicine 10.64898/2026.03.20.26348950 medRxiv
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The in vitro study aimed to evaluate linear dimensional shifts in intraoral photographs of the esthetic zone captured using two smartphone cameras--the iPhone 15 Pro Max and the Samsung Galaxy S23 Ultra--compared to a digital single-lens reflex (DSLR) camera, which is regarded as the gold standard for dental photography. Imaging was performed under controlled conditions using a custom-designed stand and stabilizer to maintain a consistent distance and angle between the dental model and the photographic devices. Standardized frontal and occlusal images of the anterior maxillary region were acquired, and point-to-point linear measurements between specified dental landmarks were performed using calibrated digital imaging software. Each measurement was conducted triple and then averaged across various samples per image to guarantee precision and dependability. Friedmans test with Bonferroni correction was applied for statistical analysis to evaluate differences among the imaging devices. The results indicated no statistically significant variations in linear measures between the DSLR and the Samsung Galaxy S23 Ultra (p > 0.05), however minor inconsistencies were noted between the DSLR and the iPhone 15 Pro Max. It is important to acknowledge that all images were obtained utilizing the stabilization system, which contrasts with the conventional handheld approach applied in clinical environments and could impact the external validity of the results. The Samsung Galaxy S23 Ultra, in telephoto mode, demonstrated measurement precision similar to that of a DSLR camera, potentially serving as a reliable choice for clinical intraoral photography. The iPhone 15 Pro Max demonstrated potential, although minor measurement discrepancies.