Search Results (31,097)

Neurogenic atrophy is the most severe type of muscle atrophy. It can be caused by injury or disease of the nerve that connects to the muscle. Damage to the sciatic nerve (nervus ischiadicus) initiates molecular processes that lead to the transformation of muscle dysfunction into an atrophic state. Oxidative stress is one of the key factors that initiates skeletal muscle atrophy. Therefore, this study evaluates the effects of oral administration of water-soluble C₆₀ fullerenes (daily dose: 1 mg/kg), as powerful antioxidants, on the contraction dynamics of the rat musculus soleus on days 15, 30, and 45 following neurogenic atrophy induced by transection of the nervus ischiadicus. Using biophysical (tensometric), biochemical, and histological analyses, we evaluated the biomechanical parameters of musculus soleus contraction (time of onset of muscle force response, integrated muscle power, maximum and minimum contraction forces), blood biochemical markers (concentrations of C-reactive protein, lactate, creatinine, and reduced glutathione, as well as superoxide dismutase and catalase activities), as well as histological and morphometric indicators of muscle damage in rats on days 15, 30, and 45 after injury induction. It was found that the use of water-soluble C₆₀ fullerenes improves the contractile activity of the musculus soleus after neurogenic atrophy and has a time-dependent nature. Specifically, by day 45 of the experiment, the maximum therapeutic effect reached 23–35 ± 2% for the biomechanical parameters of muscle contraction, and the biochemical blood parameters have nearly approached the control values. Finally, histological analysis confirmed a significant reduction in signs of destruction in muscle fibers and the level of fibrosis in the musculus soleus. These findings suggest the potential application of water-soluble C₆₀ fullerenes in the treatment of pathological conditions of the muscular system arising from peripheral nerve injury. Full article

Soil salinization represents one of the most severe abiotic constraints on global forest productivity. Populus, the most widely cultivated fast-growing timber tree and a premier model woody plant, exhibits striking intrageneric variation in salt tolerance—from the extremely halophytic Populus euphratica to highly salt-sensitive cultivated clones. Understanding the molecular basis of this variation has profound implications for saline–alkali land reclamation and salt-tolerant variety breeding. This review systematically synthesizes current knowledge on Populus salt-stress responses, covering three primary injury mechanisms (osmotic stress, ionic toxicity, and oxidative damage) and the corresponding physiological countermeasures. We further survey functional genes across four major categories: ion transporters, osmotic-adjustment enzymes, antioxidant-defense components, and transcription factors. Crucially, we extend beyond the herbaceous-plant paradigm by examining salt-tolerance strategies that are specific to the woody architecture of Populus: long-distance radial and axial Na⁺ transport through tall stems, salt sequestration in senescent bark and wood parenchyma, and deep-root ion exclusion strategies. Comparative insights from other woody genera are incorporated to highlight convergent and divergent mechanisms. On this basis, we propose an integrated multi-level regulatory model in which Na⁺ compartmentalization/efflux serves as the core, ROS homeostasis as the key regulatory axis, and osmotic adjustment as the auxiliary strategy. Outstanding challenges—including unresolved primary salt-signal perception, insufficient pathway integration, and limited in planta gene-function verification—are critically assessed, and future research priorities encompassing multi-omics integration, CRISPR-based gene editing, and natural-population genomics are outlined. Full article

Background: Fasting plasma glucose, glycated hemoglobin (HbA1c), and oral glucose tolerance testing remain central to the diagnosis and monitoring of dysglycemia, but they mainly reflect the average glycemic exposure or discrete time-point measurements and may not capture intraday and interday glucose fluctuations. Glycemic variability (GV) has been associated with oxidative stress, endothelial dysfunction, inflammation, and diabetes-related complications, although much of the evidence derives from experimental, clinical, and diabetes-care settings rather than occupational cohorts. Aim: This narrative review examines the physiological basis, measurement, and potential occupational relevance of GV and continuous glucose monitoring (CGM) in working populations. Methods: Literature was narratively selected from biomedical databases, major guidelines, consensus statements, and occupational-health sources, prioritizing reviews, clinical guidelines, cohort studies, mechanistic studies, and CGM studies. No systematic search, risk-of-bias assessment, or quantitative synthesis was performed. Main findings: CGM is an established technology in selected diabetes-care contexts and provides metrics such as coefficient of variation, time in range, time above range, and time below range. Its use in occupational medicine, however, remains investigational outside selected clinical circumstances. Work-related factors such as shift work, circadian disruption, sleep loss, psychosocial stress, irregular meal timing, sedentary behavior, and variable physical workload may influence glucose regulation, but direct evidence linking these exposures to CGM-measured GV in workers remains limited. Implications: Potential applications include research on occupational determinants of metabolic health, monitoring of workplace lifestyle interventions, and individualized management of workers with diabetes in safety-sensitive roles, provided that consent, confidentiality, clinical follow-up, equity, and data-governance safeguards are ensured. Conclusions: GV assessment may complement traditional metabolic markers in selected occupational-health contexts, but routine CGM-based surveillance of general worker populations is not currently supported by sufficient evidence. Further longitudinal and interventional studies are required. Full article

Broiler meat is an important source of protein with a balanced essential amino acid profile; however, the environmental stress associated with a high stocking density can reduce its nutritional value. Adaptogen supplementation represents a promising strategy to mitigate this negative impact. This study aimed to evaluate the amino acid composition of the breast and thigh muscles of Smena-9 broiler chickens under a high stocking density and dietary supplementation with an adaptogens complex (dihydroquercetin + vitamins E and C). The experiment was conducted on 120 broilers allocated to four groups: recommended stocking density (negative control), high stocking density (positive control), high stocking density with adaptogens from day 21, and high stocking density with adaptogens from day 1 of the experiment. The stocking density changed as the bird grew. On day 21, the bird stocking density in the S(-)CON group was 38 heads per 1 m², in the other groups it was increased by 10% and amounted to 42 heads per 1 m². Each week, the stocking density changed and amounted to 32 and 35 heads per 1 m² in 28–35 days, 21 and 23 heads per 1 m² in 35–42 days, and 17 and 19 heads per 1 m² in 43 days and until the end of fattening, respectively. The amino acid profile was determined by ion-exchange chromatography with post-column derivatization using ninhydrin. Age was the primary factor influencing the amino acid composition, followed by muscle type and stocking density. Sex-related effects were less pronounced and were observed at 24 days of age. Breast meat exhibited higher amino acid content than thigh meat (82.4–89.9 vs. 65,8–77.8 g/100 g dry matter for total amino acids, respectively). Under a high stocking density, the most notable changes were observed in the thigh muscle at early ages. By day 52, the birds receiving the adaptogen complex from day 1 showed an increase in the sum of essential amino acids in the breast meat (+2.4%, p < 0.05), with the most pronounced improvements observed for methionine (+5.9%, p < 0.001) and lysine (+3.9%, p < 0.05) compared with the recommended-density control group (S(-)CON). Additionally, early adaptogen administration preserved the levels of flavor-related amino acids between days 34 and 52, whereas a decline was observed in other groups, indicating maintained sensory quality with age. Thus, the early administration of the adaptogen complex appears to mitigate for high stocking density negative effects and contributes to preserving the nutritional value of broiler meat, although the underlying mechanisms remain hypothetical and require further. Full article

BBX transcription factors are key regulators of plant growth, development, and stress responses, yet their functions in jujube (Ziziphus jujuba Mill.), an economically important fruit tree, remain largely unexplored. Here, we systematically identified 26 ZjBBX genes and comprehensively analyzed their phylogenetic relationships, structural features, and expression dynamics. Our integrative approach revealed three major findings. First, nine ZjBBX genes exhibited distinct expression patterns during fruit coloration, with ZjBBX9 and ZjBBX25 emerging as persistent up-regulated candidates. Second, under salt stress, ZjBBX members displayed three contrasting response modes, sustained down-regulation, rapid induction, or sharp repression, suggesting functional diversification in salinity adaptation. Third, under jujube witches’ broom, ZjBBX8, ZjBBX11, and ZjBBX13 showed differential expression between healthy and infected materials, implicating them in biotic stress defense. Collectively, this study provides the first multidimensional expression atlas of the ZjBBX family linked to fruit quality, salt tolerance, and pathogen resistance in jujube. Our findings open new avenues for marker-assisted breeding and genetic improvement of stress-resilient jujube cultivars. Full article

In recent decades, numerical methods have become indispensable tools for solving complex problems in science and engineering. Among these, the finite element method (FEM) is widely recognized as a powerful computational approach. However, traditional FEM has significant limitations when modeling discontinuities such as cracks, holes, or material interfaces, particularly in functionally graded materials (FGMs). To address these challenges, this study proposes an advanced framework that integrates the Extended Finite Element Method (XFEM) with Isogeometric Analysis (XIGA), referred to as XFEM–XIGA, to simulate stress concentration factors (SCFs) around circular holes in both isotropic and FGM plates. The proposed methodology employs the level-set method to represent discontinuous boundaries and incorporates appropriate enrichment functions into the displacement field, allowing accurate modeling of stress concentrations without the need for remeshing. MATLAB codes were developed to implement this integration, providing a flexible computational platform for practical engineering applications. The performance of the proposed XFEM–XIGA approach was evaluated using several benchmark problems, including isotropic plates with circular holes near material boundaries and FGMs subjected to uniaxial tensile loading. The results obtained from the XFEM–XIGA model were compared with analytical solutions, standard FEM results, and available experimental data. For isotropic plates, the XFEM–XIGA model achieved a stress concentration error of 1.71%. For FGM plates with cracks or circular holes, the error was 2.55% compared with exact solutions. These findings demonstrate the robustness and accuracy of the integrated method in handling complex geometries and heterogeneous material properties. Overall, this study shows that the combination of XFEM and XIGA offers an efficient and reliable tool for analyzing stress concentration factors in FGM structures. The proposed approach provides improved modeling capabilities for industrial components where stress concentrations at material boundaries are critical to structural integrity and performance. Full article

Spirituality and religiosity are increasingly recognized as important factors influencing mental health, particularly among women exposed to diverse vulnerabilities such as interpersonal violence, trauma, HIV infection, homelessness, and socioeconomic disadvantage. This systematic review aimed to synthesize evidence on the associations between spiritual or religious resources and mental health outcomes in these populations. A systematic search was conducted in Scopus, PubMed, and Web of Science to identify studies examining the association between spirituality, religiosity, and mental health outcomes in vulnerable women. A total of 28 studies were identified, including cross-sectional, longitudinal, and mixed-methods designs, which measured spirituality and religiosity using validated instruments such as SWBS, DUREL, FACIT-Sp-12, and Brief RCOPE, alongside standardized mental health measures. Narrative synthesis revealed that the majority of studies (n = 15) reported that higher spiritual well-being, intrinsic religiosity, and adaptive religious coping were associated with lower depression, anxiety, and post-traumatic stress, and with higher resilience, quality of life, and post-traumatic growth. These associations appeared to be shaped by contextual factors, including the type and severity of trauma, cultural and religious frameworks, and the lived experiences of the populations studied. Negative associations were primarily linked to negative religious coping (n = 5 studies), rather than religiosity per se. Additional factors that attenuated or reversed the expected positive effects included higher trauma severity or ongoing adversity (n = 4), reactive patterns in which greater psychological distress was associated with increased use of religious coping (n = 3), maladaptive religious beliefs such as interpretations of trauma as divine punishment (n = 2), and cultural or contextual influences (n = 3). Overall, the evidence suggests that spirituality and specific dimensions of religiosity (e.g., intrinsic religiosity, religious coping) can support mental health among vulnerable women, though personal, cultural, and situational factors shape their impact. These findings suggest the potential value of integrating spiritual resources into interventions and the need for further longitudinal and culturally sensitive research. Full article

Previous studies on rats showed a deterioration of left ventricular (LV) function and myocardial injury characterized by oxidative/nitrosative stress, PARylation, and apoptosis in the heart after three days of hypoxia. In the present study on rats, we investigated whether a three-day recovery period in normoxia can reverse myocardial injury and dysfunction. Further, we studied the effects of norepinephrine (NE) administration as a model of strong sympathetic activation on hypoxia-induced LV dysfunction and myocardial damage, as well as their reversibility. Three days of normobaric hypoxia (10% O₂) significantly decreased LV systolic function. Contrary to our expectations, NE infusion even aggravated the depression in LV function. These dysfunctions were completely reversed after three days of normoxic recovery. In contrast, nitrotyrosine as a marker of oxidative/nitrosative stress receded incompletely, and poly(ADP-ribose) (PAR) levels were even higher after the recovery period. However, apoptosis-inducing factor receded, at least partially indicating that PAR-related apoptosis (parthanatos) is probably not a major cause of hypoxia-induced LV dysfunction. Additional administration of NE mildly aggravated oxidative/nitrosative stress but did not significantly intensify PARylation and consequently, parthanatos. The findings demonstrate that hypoxia-induced LV dysfunction is reversible, suggesting that subchronic hypoxia and subsequent reoxygenation might have a better prognosis for the LV than classical ischemia/reperfusion injury. Full article

The precious aquatic plant Nymphaea hybrid, is valued for its ornamental and economic importance but is highly sensitive to environmental fluctuations. However, the interactive effects of light and temperature, two critical abiotic factors, on its photosynthetic performance and underlying structural basis remain poorly understood. In this paper, we conducted a two-factorial experiment in which N. hybrid plants were exposed to five light–temperature regimes for 9 days: control (T0, 800 μmol·m⁻²·s⁻¹ + 25/20 °C); low light–low temperature—LLLT (T1, 200 μmol·m⁻²·s⁻¹ + 15/10 °C); low light–high temperature—LLHT (T2, 200 μmol·m⁻²·s⁻¹ + 35/30 °C); high light–low temperature—HLLT (T3, 1400 μmol·m⁻²·s⁻¹ + 15/10 °C); and high light–high temperature—HLHT (T4, 1400 μmol·m⁻²·s⁻¹ + 35/30 °C). We systematically investigated changes in photosynthetic pigments, gas exchange, chlorophyll fluorescence, and leaf ultrastructure by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that: The HLLT treatment (T3) inflicted the most severe damage, triggering a rapid decline in net photosynthetic rate (Pn), maximal photochemical efficiency (F_v/F_m), and chlorophyll content, coupled with a significant increase in intercellular CO₂ concentration (Ci). Ultrastructurally, T3 caused stomatal closure, disintegration of thylakoid membranes, and accumulation of large osmophilic granules, indicating severe photo-oxidative stress. In contrast, the LLHT treatment (T2) demonstrated remarkable resilience, with physiological and structural parameters closely resembling the control. The HLHT treatment (T4) caused intermediate damage, primarily through non-stomatal limitations over time. Our findings demonstrate a significant light–temperature interaction in N. hybrid. The thermophilic nature of N. hybrid was evident: high temperature mitigated the negative effects of low light, whereas low temperature, especially in combination with high light, acted synergistically to cause catastrophic damage to the photosynthetic apparatus. This study provides a mechanistic understanding of N. hybrid’s environmental adaptability, offering critical insights for its cultivation management under changing climate conditions, especially in high altitude and high latitude areas. Full article

Tire wear particles (TWPs) are a significant source of microplastics and chemical additives in the environment; however, differences in the toxicity of particles from different vehicle types remain unclear. This hydroponic study compared the phytotoxicity of leachates from aircraft- and automobile-derived TWPs on mung bean. Both leachates inhibited seed germination and seedling growth, with aircraft TWP leachates showing stronger effects, including greater germination delays and more pronounced reductions in shoot height, root length, and root surface area. Physiological analyses revealed that TWP leachates induced oxidative stress, characterized by significant suppression of superoxide dismutase (SOD) activity, compensatory increases in catalase (CAT) and peroxidase (POD) activities, and marked accumulation of malondialdehyde (MDA), indicating severe membrane lipid peroxidation. Chlorophyll content decreased in all groups, with greater reductions under aircraft leachates. Toxicological Priority Index (ToxPi) modeling identified zinc as the shared primary risk factor, while aircraft tire-specific additives (e.g., dicyclohexylamine, 1,2-dihydro-2,2,4-trimethylquinoline) constituted a distinct risk component linked to differentiated formulations. Aircraft TWP leachates thus exhibit stronger phytotoxicity through multiple pathways. These findings support refined environmental risk assessment and targeted control measures for aircraft TWPs. Full article

Background. Behavioral procrastination has been increasingly recognized as a maladaptive self-regulatory pattern associated with unhealthy lifestyle behaviors, psychological stress, and adverse cardiometabolic profiles. However, its relationship with accelerated cardiovascular aging remains poorly understood. This study aimed to evaluate the association between behavioral procrastination and heart age acceleration in a large occupational cohort of Spanish workers. Methods. A multicenter cross-sectional study was conducted including 92,184 actively employed Spanish workers undergoing routine occupational health examinations between 2021 and 2024. Behavioral procrastination was assessed using the Pure Procrastination Scale-9 (PPS-9). Estimated heart age and heart age acceleration were calculated using a cardiovascular risk-factor-based algorithm. Multivariable linear and logistic regression analyses were performed to evaluate associations between procrastination score, continuous heart age acceleration, and accelerated cardiovascular aging phenotypes after adjustment for demographic, lifestyle, anthropometric, and cardiometabolic variables. Restricted cubic spline analyses and sex-stratified analyses were additionally conducted. Results. Higher procrastination levels were associated with progressively worse cardiometabolic and cardiovascular aging profiles. Mean heart age acceleration increased from −3.1 ± 6.0 years in participants with very low procrastination to 14.0 ± 6.4 years in those with very high/chronic procrastination (p < 0.001). The prevalence of accelerated cardiovascular aging (>0 years) increased from 27.2% to 94.2% across increasing procrastination categories, whereas severe accelerated cardiovascular aging (≥10 years) increased from 1.7% to 75.6% (both p < 0.001). In fully adjusted multivariable analyses, each 5-point increase in PPS-9 score was associated with a 0.50-year increase in heart age acceleration (B = 0.50; 95% CI 0.48–0.52; p < 0.001). Participants with very high/chronic procrastination exhibited significantly higher odds of accelerated cardiovascular aging (OR 1.89; 95% CI 1.65–2.18) and severe accelerated cardiovascular aging (OR 2.51; 95% CI 2.16–2.92). Associations were significantly stronger among women (p-interaction < 0.001). Findings remained robust in sensitivity analyses excluding participants with diabetes mellitus. Conclusions. Behavioral procrastination was associated with higher estimated heart age acceleration and less favorable cardiovascular aging profiles in this large occupational cohort. Higher procrastination severity was consistently related to greater estimated heart age acceleration and a higher prevalence of cardiovascular aging phenotypes, even after extensive multivariable adjustment. These findings indicate that higher procrastination levels were associated with less favorable cardiovascular aging profiles beyond traditional biomedical risk factors. However, given the cross-sectional design, no conclusions regarding causality or temporality can be drawn. Full article

Finger millet (Eleusine coracana L.) is rich in bioactive compounds, including flavonoids. Following exogenous substance regulation, its sprouts can achieve efficient flavonoid enrichment. This study investigates the regulatory effects of exogenous salicylic acid (SA) and γ-aminobutyric acid (GABA) on the physiological metabolism, oxidative stress response, and flavonoid biosynthesis of finger millet sprouts subjected to 5 mM zinc sulfate (ZnSO₄) stress. Compared to treatment solely with ZnSO₄, the application of both 50 μM salicylic acid (SA) and 1 mM gamma-aminobutyric acid (GABA) markedly enhanced flavonoid biosynthesis, with respective yields of 8.53 μg/sprout and 8.85 μg/sprout observed by 6 days post-germination. Concurrently, SA and GABA attenuated ZnSO₄-induced oxidative damage. During days 4 and 6 post-germination, malondialdehyde and hydrogen peroxide levels in sprouts were significantly reduced, with levels at 6 days showing a particularly notable decrease. Moreover, the catalytic activities of catalase, peroxidase, superoxide dismutase, and ascorbate peroxidase were significantly upregulated. Further analysis revealed that both treatments significantly activated the phenylpropanoid biosynthesis pathway. The activities of key rate-limiting enzymes, phenylalanine ammonia-lyase, cinnamate-4-hydroxylase, and 4-coumarate-CoA ligase, along with the expression levels of their corresponding genes, were markedly upregulated. Concurrently, the expression of genes and transcription factors, specifically myeloblastosis and NAC transcription factors, involved in regulating reactive oxygen species homeostasis also increased. These findings suggest that exogenous SA, GABA, and ZnSO₄ cotreatment can effectively enhance the accumulation of flavonoids and the nutritional quality of finger millet sprouts by bolstering antioxidant capacity and modulating the flavonoid biosynthesis pathway. This investigation establishes a theoretical framework for the production of superior, bioactive finger millet sprout ingredients. Full article

The presence of openings in spherical pressure hulls compromises the structural integrity and induces stress concentrations at the opening area. The strength assessment of shell openings remains a challenge in shell strength theory, even if using an approximated algorithm. While finite element analysis (FEA) is commonly employed, it is computationally prohibitive for iterative design. To address this gap, this study proposes a novel theoretical framework to calculate the Stress Concentration Factor (SCF) for spherical hulls with complex opening reinforcements under external pressure. A geometric transformation method based on the Equal Area Criterion (EAC) is established to convert complex reinforcement geometries into analytical forms. The accuracy is validated through comprehensive FEA and full-scale hydrostatic pressure tests on titanium-alloy manned hulls. The results demonstrate that the proposed method has high accuracy and exhibits excellent applicability, with deviations from experimental data generally within 5%. This study establishes a rapid assessment framework with high accuracy, providing a valuable engineering tool for deep-sea structural design. Full article

Iron is essential for normal cellular function, but its dysregulation is increasingly recognized as a key factor in colorectal tumorigenesis. This review provides an integrated overview of iron-related biomarkers across the full spectrum of colorectal neoplasia, from preneoplastic lesions to advanced colorectal cancer (CRC). Evidence suggests that alterations in iron metabolism begin early, at the level of colorectal adenomas, where increased iron uptake and impaired export contribute to local iron accumulation and oxidative stress. As lesions progress to carcinoma, this imbalance becomes more pronounced, leading to expansion of the intracellular labile iron pool and supporting tumor growth, metabolic adaptation, and genomic instability. At the systemic level, patients often exhibit reduced circulating iron despite preserved or elevated ferritin levels, reflecting inflammation-driven functional iron deficiency. This pattern is largely mediated by dysregulation of the hepcidin–ferroportin axis. In this context, transferrin saturation and soluble transferrin receptor may provide a more accurate assessment of iron availability than ferritin alone. At the tissue level, increased expression of iron import proteins and impaired iron export promote intracellular iron retention. Excess iron further contributes to reactive oxygen species generation, leading to damage of DNA, lipids, and proteins. Clinically, iron-related biomarkers show variable diagnostic performance but may offer prognostic value. Integrating systemic and tissue biomarkers could improve risk stratification and support personalized approaches across the CRC continuum. Full article

Background: Occupational moral injury is associated with nurses’ psychological well-being, yet evidence linking it to professional quality of life remains limited, and no validated Greek version of the Occupational Moral Injury Scale (OMIS) has been available. Methods: A cross-sectional study was conducted among 301 nurses from two public hospitals in Greece. Using convenience sampling, 350 questionnaires were distributed, yielding an 86.0% response rate. Participants completed the Occupational Moral Injury Scale (OMIS) and the Professional Quality of Life Scale Version 5 (ProQOL-V). The OMIS was translated and culturally adapted into Greek through a forward–backward translation process, and its validity and reliability were assessed using confirmatory factor analysis and internal consistency testing. Results: The Greek OMIS demonstrated excellent internal consistency (Cronbach’s α = 0.95). CFA provided preliminary support for the proposed factorial structure, although model fit indices indicated a marginal-to-moderate fit (CFI = 0.887, TLI = 0.866, SRMR = 0.070 and GFI 0.902). Participants reported relatively high compassion satisfaction (M = 37.30, SD = 7.35) and moderate levels of burnout (M = 23.36, SD = 5.06) and secondary traumatic stress (M = 22.13, SD = 7.28). Betrayal was negatively associated with compassion satisfaction (r = −0.151, p = 0.009) and positively associated with burnout (r = 0.427, p < 0.001) and secondary traumatic stress (r = 0.366, p < 0.001). Regression analyses showed that dimensions of moral injury were associated with burnout, secondary traumatic stress, and compassion satisfaction, with betrayal showing the strongest associations. Conclusions: Occupational moral injury was associated with poorer professional quality of life, underscoring the need for organizational support, ethical resources, and clinical supervision to promote healthcare professionals’ well-being and resilience. Full article