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Prognostic markers Abstract Fungal infections represent a worrisome complication in hematologic cancer patients and in the absence of disease specific symptoms, it is important to establish new biological indicators, which can be used during mould-active prophylaxis. Recently, miRNAs have appeared as candidate diagnostic and prognostic markers of several diseases.

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A pilot clinical study was performed to evaluate the diagnostic utility of 14 microRNAs which can be related to invasive fungal infections. A tetramiR assay was designed to monitor peripheral blood specimens.

Optimal cut-off was estimated by using the median value fold change 1. The biomarker panel was evaluated on two independent sample cohorts implementing different antimicrobial prophylactic strategies. The receiver operating characteristic analysis with area under the curve proved to be 0.

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In summary, the tetramiR assay proved to be a promising diagnostic adjunct with sufficient accuracy and sensitivity to trace invasive aspergillosis in hemato-oncology patients. Members of the Aspergillus and Candida genera are predominant etiological agents 23.

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In the past decades the incidence of aspergillosis has increased 4567. Currently, other relevant fungi are also increasingly identified, such as Cryptococcus spp. The well-established risk factors include underlying malignancy, immunosuppression and profound neutropenia 1011 In high-risk hematology patient groups, the first-line prophylaxis is preferred Timely initiation of treatment critically affects the outcome of the disease however diagnostic driven strategy remains a challenge 6.

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Identification of IA relies on the combination of cultivation and non-conventional microbiological tests such as fungal antigen testing, as well as radiology and histopathology 4. MiRNAs emerged as important endogenous regulators of virtually all basic biological processes In response to pathological processes miRNAs are expressed by all cell types and tissues into the circulation where their free forms are protected from RNAse mediated degradation Recent studies estimate the potential of free circulating miRNAs as prognostic disease biomarkers in diagnosis.

During infection, lung hypoxia established by an ischemic microenvironment, vascular invasion, thrombosis, antiangiogenic factors such as gliotoxin, are considered to be a significant virulence factor of A. Further data revealed the participation of miR26a, miR26b in relation to apoptosis and autophagy The regulatory role of miR and miR was elucidated during A.

MiR, miR16 and miR were related to immune responses, anti-inflammatory processes accompanying infection, and cell apoptosis during C. Furthermore, miR, miR26, miR16 and miR21 were found to modulate immune response against Gram-positive bacteria in human, mouse and murine models 2728 However, due to the lack of consensus in methodology, as well as processing and normalization, the actual number of clinical studies which establish the contribution of certain miRNAs to IFDs is surprisingly low 20213031323334 To ameliorate success and accuracy of diagnosis, a definite proof-of-concept was set to capture invasive aspergillosis specific miRNA expression patterns in a hemato-oncology patient population.

All miRNAs are potentially obtainable from the peripheral blood circulation.

To our present knowledge, this is a pioneer clinical study which could lead to the implementation of miRNAs supporting the diagnosis of IA among patients with hematologic malignancies and profound neutropenia. Patients of these study groups were well balanced according to age mean 60 ± Postmortem histology PMH was pursued in There was one case P4 where pathology confirmed the presence of the fungus Aspergillus in the central nervous system.

In C1 There were no significant differences in the inflammation status of the two study groups. Figure 1 Shortlisting of parameters of our patient recruitment strategy with regard to baseline demographics and center specific characteristics. Full size image First-line antifungal prophylaxis was associated with lower IA prevalence In C2, primary antifungal prophylaxis was type 1 diabetes and rapid heart rate in the case of OH patients.

MiR was found to be optimal across patients and controls Fig. Figure 2 Testing of four potential miRNA normalizers. Hsa-miR was found to be optimal normalizer for estimating relative miRNA expression fold changes.

P stands for onco-hematology patients of this study Cq Figure 3 displays the study timeline and the date of recruitments in the case of two Hungarian centers; C1 and C2 with a cluster heatmap demonstrating normalized relative gene expression levels of miRNA targets measured in the peripheral blood.

All 14 miRNAs were expressed in the peripheral blood samples of patients and were generally overexpressed in comparison to healthy controls.

Figure type 1 diabetes and rapid heart rate Relative expression levels of selected miRNAs in type 1 diabetes and rapid heart rate with hematologic malignancies. Black colors indicate no difference in gene expressions in comparison to the healthy controls, green scale represents the type 1 diabetes and rapid heart rate changes of under- while pink the overexpressions.

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In the case of miRp significant overexpression was observed in both aspergillosis and bacteremia, thus it was omitted from further analysis Fig. In the case of three miRNAs miR26b-5p, miRp, miRpbacteremia did not obscure the significant overexpressions indicating aspergillosis in diseased patients Fig. In Fig. Reassuringly, the relative fold changes of these miRNAs proved to be specific for aspergillosis and bacterial co-infections did not interfere with the expression profiles p-values 0.

Violin plots with Kernel density estimations were also made to visualizing the distribution and probability density of relative fold changes of the miRNAs in different patient groups Fig. Figure 4 miRNAs showing statistically significant overexpressions indicating aspergillosis.

Red spotted microRNAs situated towards the right top quadrant represent values of increasing magnitude fold changes. Full size image Diagnostic performance of the miRNA assays Differential expression matrices represent the values of alterations in relative miRNA fold changes fc when comparing different patient groups.

MiRp showed the highest association with aspergillosis Δlog2fc 6.

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All miRNAs were assessed to be more abundant during aspergillosis and showed only a mild correlation with bacteremia. Noticeably, miR26b-5p Δlog2fc: 4.

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All miRNAs showed remarkable expression alterations due to aspergillosis in comparison to bacteremia. We observed moderate fold changes in the expression of several miRNA targets due to aspergillosis mirp Δlog2fc: 1. Log10 transformed fold changes log10 fc for cases proven IA, probable IA and controls possible IA were dichotomized by mapping the sensitivity values in relation to 1—specificity in the case of mirp, miR26b-5p, miRp, miRp to estimate optimal cut-off values for these biomarkers Fig.

MiRp log10 transformed fold change: 1. To mitigate interpatient variability tetramiR diagnostic panel was established for a more reliable diagnosis of IA by the combined application of miRp, miRp, miR26b-5p, miRp Fig. This model relies on the median gene expression values log10 fold change: 1. Figure 5 Log-2 transformed miRNA expression fold changes were used to exploit expression alterations between patient groups.

Extents of logarithmic Δlog2fc transformed fold differences are designated by dots.

A dot colored red is more abundantly expressed by the condition designated in the columns while green colored dots show more abundant fold nephrogogenic nonaxing diabétesz kezelésére designated by the rows.

Distribution of the test results of cases and controls are also shown with significances Fig. Sample concordance was also assessed between the two classifiers; Platelia Aspergillus GM-EIA and tetramiR panel showed a fair agreement with an observed ratio of We did not observe significant difference in the distribution of test results between cases and controls.

Besides studies revealing the molecular mechanisms underlying the associations of telomere defects and mitochondrial functions, investigations of mitochondrial DNA copy number mtDNAcn and telomere length TL in healthy and disease phenotypes have likewise begun, with the aim of gaining more insights about their relationship in humans. Material and methods: A total of asymptomatic adult twins, comprising 96 monozygotic MZ and 46 dizygotic DZ twins mean age: Results: We found that twins were similar in their intraclass correlation coefficients irrespective of zygosity, suggesting a possibly more important role of common shared environmental factors compared to non-shared unique environmental and to a smaller degree also individual genetic influences. Following bivariate estimates and correction with significant predictors, the independent positive associations were further verified.

None of them provided false negative FN results. In the case of tetramiR panel the median of the log10 transformed gene expression data was used. Full size image Discussion With the significant developments achieved in the field of oncology, nosocomial etiologies are continuously associated with high mortality and increased susceptibility to IFDs The prophylactic use of available azoles during anticancer therapy has led to a reduction of Candida blood stream infections however the growing antifungal resistance especially in the case of Aspergillus fumigatus and A.

Aspergillus-related pulmonary diseases can encompass various clinical syndromes moreover immunosuppressed patients may develop invasive pulmonary aspergillosis IPA 45 Despite the immense number of published guidelines, no obvious recommendations are available addressing diagnosis and managing infections in these patient groups 4748495051 This pilot study was performed to capture the expression of specific free circulating miRNAs in blood to support the diagnosis of invasive aspergillosis.

In the case of severely immunocompromised patients the escalation in the lengths of hospital stay Cukorbetegség németül appreciably raises the odds of nosocomial co-infections. Patients with fungal septicaemia show significantly higher mean hospital costs thus duration of hospitalization was positively correlated with disease occurrence

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