Immune thrombocytopenic purpura (ITP) is a blood disorder characterized by a low platelet count of (less than 100 × 10⁹/L). ITP is an organ-specific autoimmune disease in which the platelets and their precursors become targets of a dysfunctional immune system. This interaction leads to a decrease in platelet number and, subsequently, to a bleeding disorder that can become clinically significant with hemorrhages in skin, on the mucous membrane, or even intracranial hemorrhagic events. If ITP was initially considered a hemorrhagic disease, more recent studies suggest that ITP has an increased risk of thrombosis. In this review, we provide current insights into the primary ITP physiopathology and their consequences, with special consideration on hemorrhagic and thrombotic events. The autoimmune response in ITP involves both the innate and adaptive immune systems, comprising both humoral and cell-mediated immune responses. Thrombosis in ITP is related to the pathophysiology of the disease (young hyperactive platelets, platelets microparticles, rebalanced hemostasis, complement activation, endothelial activation, antiphospholipid antibodies, and inhibition of natural anticoagulants), ITP treatment, and other comorbidities that altogether contribute to the occurrence of thrombosis. Physicians need to be vigilant in the early diagnosis of thrombotic events and then institute proper treatment (antiaggregant, anticoagulant) along with ITP-targeted therapy. In this review, we provide current insights into the primary ITP physiopathology and their consequences, with special consideration on hemorrhagic and thrombotic events. The accumulated evidence has identified multiple pathophysiological mechanisms with specific genetic predispositions, particularly associated with environmental conditions.

Dermal fibroblasts, the primary stromal cells of the dermis, exhibit remarkable plasticity in response to various stimuli, playing crucial roles in tissue homeostasis, wound healing, and ECM production. This study examines the molecular mechanisms underlying fibroblast plasticity, including key signaling pathways, epigenetic regulation, and microRNA-mediated control. The impact of aging on ECM synthesis and remodeling is discussed, and the diminished production of vital components such as collagen, elastin, and glycosaminoglycans are highlighted, alongside enhanced ECM degradation through upregulated matrix metalloproteinase activity and accumulation of advanced glycation end products. The process of cellular senescence in dermal fibroblasts is explored, with its role in skin aging and its effects on tissue homeostasis and repair capacity being highlighted. The senescence-associated secretory phenotype (SASP) is examined for its contribution to chronic inflammation and ECM disruption. This review also presents therapeutic perspectives, focusing on senolytics and geroprotectors as promising strategies to combat the negative effects of fibroblast senescence. Current challenges in translating preclinical findings to human therapies are addressed, along with future directions for research in this field. This comprehensive review explores the complex interplay between dermal fibroblast plasticity, cellular senescence, and extracellular matrix (ECM) remodeling in the context of skin aging. In conclusion, understanding the complex interplay between dermal fibroblast plasticity, cellular senescence, and extracellular matrix (ECM) remodeling is essential for developing effective anti-aging interventions, which highlights the need for further research into senolytic and geroprotective therapies to enhance skin health and longevity. This approach has shown promising results in preclinical studies, demonstrating improved skin elasticity and reduced signs of aging.

Four carbanion monosubstituted p-aryl-1,2,4-triazol-1-ium methylids are subjected to a comparative study between their spectral and quantum-mechanical parameters in order to obtain more information about their structural features in hydroxyl solvents as water and ethanol and also on the nature of electronic absorption transitions from the visible range. The quantum mechanical analysis, made by the Spartan’14 program, established a series of molecular parameters of the studied ylids important for their reactivity and for intermolecular interactions with hydroxyl liquids. An extensive solvatochromic study of 1,2,4-triazol-1-ium ylids is impossible due to their limited solubility in liquids. Binary solvent mixtures of water and ethanol with known solvent parameters from the literature were used for this study. The electronic absorption spectra in binary solvents water and ethanol were used to establish the influence of intermolecular interactions on the spectral characteristics of the studied methylids and also on the composition of their first solvation shell in ternary solutions. The difference between the interaction energies in molecular pairs ylid–water and ylid–ethanol was determined based on the statistical cell model applied to the ternary solutions of the type of ylid + water + ethanol. The obtained values are very small due to the hydroxylic nature of the two solvents.

Attention-deficit/hyperactivity disorder (ADHD) is a heterogeneous neurodevelopmental disorder, and increasing evidence suggests that inflammatory and oxidative processes may contribute to its biological complexity. Despite these observations, no molecular biomarker has yet been established for clinical diagnosis. In this narrative review, we examine interleukin-18 (IL-18) and the NFE2L2/NRF2 antioxidant pathway as two potentially complementary components of the inflammation–redox landscape in adult ADHD, with particular attention to their possible assessment in saliva. For this purpose, we conducted a focused search of PubMed/MEDLINE, Scopus, and Web of Science, bringing together evidence from human ADHD studies, mechanistic and experimental research, and studies investigating the feasibility of salivary biomarkers. IL-18 is closely associated with inflammasome-mediated inflammatory signaling, whereas NFE2L2 encodes NRF2, a major regulator of antioxidant and cytoprotective responses. The evidence for these two targets in adult ADHD is not equally developed. Direct human data on IL-18 remain limited, while more recent studies have identified alterations in NRF2-related antioxidant defenses in adults with ADHD. Both IL-18 and NRF2 can be measured in human saliva, although the available evidence comes from clinical populations other than ADHD. Their detection in saliva therefore demonstrates analytical feasibility but does not establish their validity as ADHD biomarkers. At present, neither marker has been validated in the saliva of adults with ADHD. Studying them together may nevertheless provide a useful way to explore the relationship between inflammatory activity and antioxidant regulation. Future studies will require standardized saliva collection, careful assessment of oral health, and characterization of systemic inflammatory and metabolic conditions, medication use, and smoking. Initial studies should also include paired saliva and blood samples to determine how salivary measurements relate to circulating levels and whether they capture biologically meaningful variation in adult ADHD.

Background: Attention-Deficit/Hyperactivity Disorder (ADHD) is a common neuro-developmental disorder that is linked to attention, hyperactivity, and impulse control. There is emerging evidence that markers like Vitamin D, Chromogranin A (CgA), Tumor Necrosis Factor-α (TNF-α), and cortisol can be used to explain its biological mechanisms. Objective: To quantify serum levels of Vitamin D, CgA, TNF-α, and cortisol in ADHD patients and control subjects, and establish their diagnostic value. Methods: According to PRISMA guidelines, we searched Google Scholar and PubMed systematically for observational studies that assess the serum levels of the selected biomarkers in ADHD and control groups. The studies that passed the inclusion criteria were screened, extracted, and analyzed using a random-effects model. The effect sizes were presented as Hedges' g. Heterogeneity was assessed using I² statistics, and potential publication bias was assessed using funnel plots and Egger's test. Meta-regression was conducted to explore moderators like age, gender, and comorbidities. Results: 28 studies were included. Vitamin D was significantly lower in ADHD patients compared to controls (SMD = -1.19, 95% CI: -2.04 to -0.33, p = 0.0068), but heterogeneity was high (I² = 96.5%). TNF-α was significantly lower (SMD = -0.39, 95% CI: -0.65 to -0.13, p = 0.0033) with low heterogeneity (I² = 22.0%). Cortisol was significantly lower (SMD = -0.78, 95% CI: -1.48 to -0.08, p = 0.0280), with high heterogeneity (I² = 94.3%). Chromogranin A results were inconclusive due to limited data. Meta-regression revealed that age, male sex, and comorbidities significantly moderated Vitamin D effect sizes, but other predictors were not significant. Conclusion: Vitamin D, TNF-α, and cortisol are all greatly diminished in ADHD and are potential addition-al diagnostic markers. CgA is worthy of further study.

Prolonged tourniquet stasis induced by venepuncture can lead to the release of the plasma of cell lysis products, as well as tissue factor (TF), impairing the quality of coagulation test results. The accidental presence of TF in vitro can trigger the coagulation mechanism, generating a false decrease in prothrombin time (PT). Background and Objectives: Identification of short PT tests below the normal reference value that could suggest a situation of hypercoagulability. The study aimed to compare the results of the shortened PT tests at their first determination with the eventual correction following duplication of the analysis from the same sample. Materials and methods: Identification of the shortened PT tests has been carried out for a period of 4 months, upon 544 coagulation samples referred to the Hematology department of Sf. Spiridon County Clinical Emergency Hospital from Iasi, Romania. Results: Out of the 544 samples of which the results indicated a state of hypercoagulability, by repeating the determination from the same sample, for 200 (36.76%) PT tests (p = 0.001) the value was corrected, falling within the normal reference range. For 344 (63.24%) tests, the results suggested a situation of hypercoagulability. Conclusions: In order to guarantee the highest quality of the laboratory services, a proper interpretation and report of the patients’ results must be congruent and harmoniously associated to the actual clinical condition of the patient. Duplication of the PT determination from the same sample would exclude situations of false hypercoagulability and would provide significant improvement for the patient’s safety.