Search Results (113)

Elevation in the level of whole blood viscosity (WBV) is a known contributor to cardiovascular risk. Moreover, cardiovascular diseases are associated with seasonal variation and the potential impact of seasonal changes on blood viscosity, and associated biomolecules pose substantial cardiovascular risk and are therefore a subject of interest. To evaluate the effect of seasonal changes on whole blood viscosity, glycated haemoglobin and associated biomolecules, namely haematocrit and serum total protein, and their implications on management of diabetic cardiovascular risk are explored. This was a clinical laboratory retrospective observational study involving 10-year pathology data (1999–2008) which estimated whole blood viscosity (eWBV) and the associated biomolecules, namely haematocrit and serum total protein. Comparisons were made between seasonal changes and glycated haemoglobin, whole blood viscosity, haematocrit, and serum total protein levels. Whole blood viscosity, haematocrit, and serum total protein levels increased with colder seasons (p < 0.001), peaking in the winter. However, the seasonal variation in the level of glycated haemoglobin did not achieve statistical significance. Blood viscosity fluctuates between seasons, with peaks occurring in the winter season. This fluctuation will assist in adjusting monitoring and treatment strategies of diabetic risks seasonally. In addition, recognition of seasonal variations will help in precise risk assessment of timely interventions to mitigate the risk of cardiovascular events in diabetes management. Full article

This study was conducted to evaluate the effects of chia seed oil (CSO; Salvia hispanica L.) on the growth performance, haematological-biochemical parameters, immune-related gene expression, and disease resistance to Aeromonas hydrophila in common carp (Cyprinus carpio). The fish were fed diets containing 0%, 0.5%, 1%, and 2% CSO for 60 days. The results showed a significant improvement in final weight, specific growth rate (SGR), and feed conversion ratio (FCR) in fish fed diets containing 1% and 2% CSO compared to the control group. Haematocrit (Hct) and haemoglobin (Hb) levels increased in the CSO groups, while serum triglyceride and cholesterol levels decreased significantly, particularly in the 1% CSO group. The observed decrease in liver enzyme activities (AST, ALT) suggested a hepatoprotective effect of CSO. In the stress test with A. hydrophila, the highest survival rate (80%) was recorded in the 2% CSO group. Furthermore, gene expression analyses performed on spleen tissue revealed an increase in the expression of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-8 in the groups fed with CSO, particularly at the 1% level. These findings indicate that adding 1–2% CSO to carp feed promotes growth, improves lipid metabolism, strengthens immune status, and increases resistance to bacterial infection. Consequently, the use of CSO as a sustainable and functional additive to fish oil in fish feed is suggested. Full article

Early-onset fetal growth restriction (FGR) is associated with prolonged fetoplacental hypoxia and altered brain development, including deficits in hippocampal structure and function. Neuroprotective actions of lactoferrin have been described, mediated via anti-inflammatory and antioxidant properties. Here, we investigated whether the antenatal administration of lactoferrin (1) improves hippocampal structure, (2) promotes neuronal growth, and (3) mitigates neuroinflammation in the hippocampus of fetal sheep with FGR. Early-onset FGR was induced by performing single umbilical artery ligation surgery on ovine fetuses at ~89 days gestational age (dGA; term ~148 dGA), compared with appropriate for gestational age (AGA) controls. Lactoferrin supplementation to the ewe commenced at 95 dGA (oral, 36 g/day) and continued until 127 dGA (fetal group) or birth (newborn group). Experimental fetal groups included control appropriate for gestational age (AGA; n = 8), FGR (n = 5), control + lactoferrin (AGA + Lacto; n = 6), and FGR + lactoferrin (FGR + Lacto; n = 6). In the fetal group, results showed that neither FGR nor lactoferrin altered hippocampal structure at 127 dGA. Lactoferrin exposure significantly increased neuronal abundance but also altered neuronal morphology. Lactoferrin increased the neurotrophic factor, brain-derived neurotrophic factor (BDNF) in the hippocampus. Lactoferrin exerted region-specific anti-inflammatory effects, with reduced total microglial cell count and resting microglia count in the Cornu Ammonis (CA)3 region only. In the newborn cohort, we observed increased circulating haematocrit concentration in early life. These findings support that antenatal lactoferrin has an anti-inflammatory effect in the fetal brain and increases fetal brain neurotrophic factor BDNF. Still, prolonged exposure during pregnancy may yield mixed effects on fetal brain development and haematological balance. Full article

Background: Hashimoto’s Thyroiditis (HT) is one of the most common autoimmune diseases worldwide, yet little is known about the role of lipid mediators in its pathogenesis. This study investigated whether there is a link between complete blood count (CBC) and arachidonic acid (AA) derivatives resulting from the activation of lipoxygenases (LOX) in 39 female patients with HT. Material and Methods: Blood samples were used as the research material. Liquid chromatography was employed to analyze the lipid mediators. Results: Neutropenia, lymphopenia and basopenia were observed in the women studied. An increase in mean corpuscular volume (MCV) and low haematocrit (HCT) and hemoglobin (HGB) levels were also noted. The highest amounts of hydroxyeicosatetraenoic acids (5S-HETE, 12S-HETE and 15S-HETE) and 5-oxo-eicosatetraenoic acid (5-oxo-ETE) were observed in the study group. The strongest positive correlations were observed between the acids and C-reactive protein (CRP), neutrophils (NEUT), and eosinophils (EOS). Furthermore, significant correlations between eicosanoids and anthropometric parameters were also presented. Conclusions: Eicosanoids may play a crucial role in the pathogenesis of HT, affecting complete blood count. Further research in this area could lead to the development of new diagnostic markers and therapeutic strategies, including those aimed at the anticancer treatment of this gland. Full article

Background: The relationship between glycaemia and the variables of haematocrit, serum total protein and lipids possibly plays a role in pathological processes and hence is a subject of interest. Estimated blood viscosity causes impaired blood flow and is a factor in other vascular diseases. Blood viscosity is correlated with glycated haemoglobin, but the mechanism of this association has not been extensively investigated. Objective: To assess if changes in glycated haemoglobin translate into changes in blood viscosity through impact on haematocrit, serum protein or dyslipidaemia. Method: This was a clinical laboratory-based retrospective data analysis of patients attending a diabetic clinic. Analysis involved seven variables comprising serum total protein level, high-density lipoprotein cholesterol, total cholesterol, triglyceride, age and glycated haemoglobin. The statistical evaluations were descriptive, comparative and correlational. Results: A total of 12,986 sets of data represented the participants in this study. After excluding three with incomplete data of interest, the groups that were created for comparison comprised the following: good glycaemic control (2694), moderate glycaemic control (4075) and poorly controlled (6194). Serum levels of high-density lipoprotein cholesterol, total cholesterol, haematocrit and proteinaemia gradually decreased with worsening glycaemic control, while serum triglyceride and age increased. In the correlation analysis, serum triglyceride level was positively correlated with glycated haemoglobin r = 0.177, while haematocrit and proteinaemia were negatively related, at −0.045 and −0.103, respectively. Conclusions: Increase in glycated haemoglobin was inversely related to haematocrit and proteinaemia; therefore, this did not always increase with the determinants of estimated whole blood viscosity. The implication of this is that further studies are required to substantiate the observation of higher whole blood viscosity levels in patients with poorly controlled diabetes. Full article

Miniaturised sampling and extraction are redefining therapeutic drug monitoring (TDM) by enabling low-volume sampling, simplifying collection, and improving patient acceptability, while also promoting decentralised workflows and more sustainable laboratory practices. This review critically appraises the current landscape, with emphasis on analytical performance, matrix compatibility, and readiness for clinical implementation. It examines validation requirements, the extent of alignment and existing gaps across major regulatory guidelines, and recurrent challenges such as haematocrit bias, real-world stability and transport, incurred sample reanalysis, device variability, commutability with conventional matrices, and inter-laboratory reproducibility. To make the evidence actionable, operational recommendations are distilled into a practical ten-point checklist designed to support validation and translation of miniaturised approaches into routine laboratory practice. Looking ahead, priorities include automation and portable platforms, advanced functional materials, and integration with digital tools and biosensors, alongside the development of harmonised frameworks tailored to miniaturised methods and prospective clinical studies that demonstrate impact on dosing decisions, adherence, and clinical outcomes. Overall, this review aims to equip researchers, laboratory professionals, and regulators with the knowledge to implement miniaturised bioanalysis and advance personalised medicine through TDM. Full article

Background/Objectives: This study was designed to investigate the potential clinical, biochemical, haematological, and pathological associations of carpal tunnel syndrome through a multidisciplinary approach encompassing the fields of internal medicine, gastroenterology, and neurology. Methods: The study group (CTS-positive) comprised 265 patients who presented with dyspeptic complaints and underwent upper gastrointestinal endoscopy, gastric antrum biopsy, electromyography, and comprehensive biochemical and haematological analyses. A control group of 265 patients with similar symptoms but without CTS was selected for comparison. A comparative analysis was conducted on clinical findings, gastric biopsy results, and biochemical and haematological parameters. Results: There were no significant differences in age, gender distribution, or gastric biopsy findings (Helicobacter pylori, intestinal metaplasia, atrophy, and dysplasia) between the CTS-positive and CTS-negative groups. However, significant biochemical differences were identified, including elevated calcium and reduced magnesium levels in CTS-positive patients. Haematological evaluations revealed higher lymphocyte, eosinophil, basophil, erythrocyte, haemoglobin, and haematocrit levels, along with reduced neutrophil-to-lymphocyte ratios and red blood cell distribution widths in the CTS-positive group. Further analysis in the form of correlation and logistic regression analyses provided further confirmation of the association of elevated calcium, haemoglobin, and lymphocyte levels with increased risk of CTS. Conclusions: This multidisciplinary study identifies significant associations between CTS and specific biochemical and haematological parameters, notably calcium-magnesium imbalance and erythrocyte indices. These findings suggest underlying biological interactions that may guide future diagnostic and therapeutic strategies for patients with carpal tunnel syndrome. Full article

Background: End-stage renal disease (ESRD) patients on haemodialysis present a high burden of cardiovascular comorbidities and require anticoagulation, which increases bleeding risk. Methods: We performed a retrospective observational study (2021–2024) in the Haemodialysis Centre of The Clinical Emergency Hospital of Constanta County, Romania, including 50 adults with stage G5 CKD on haemodialysis for ≥3 months and receiving anticoagulant therapy. We collected from electronic medical records detailed demographic data (age, sex, place of residence), comorbidities (hypertension, atrial fibrillation, ischaemic heart disease, diabetes, deep-vein thrombosis, stroke, myocardial infarction, pulmonary embolism, cirrhosis), lifestyle factors (smoking and alcohol consumption), vascular access type (arteriovenous fistula or central venous catheter) and laboratory parameters (haemoglobin, haematocrit, creatinine, albumin, total protein, electrolytes, LDL- and HDL-cholesterol, total cholesterol, INR, APTT, D-dimer, BNP, CK-MB, troponin). All laboratory units were standardised and checked for plausibility. Results: Median age was 71 years; 48% were female. The most common comorbidities were: hypertension (100%), atrial fibrillation (100%) and ischaemic heart disease (62–81%). Patients exhibited severe anaemia (mean Hb ~9.7 g/dL), nephrotic-range proteinuria, hypoalbuminaemia, and impaired coagulation profiles (INR ~1.8–1.9; prolonged APTT in men). Female patients had higher platelet counts and D-dimer levels, suggesting a stronger prothrombotic profile, while males showed longer APTT. Cardiovascular strain was reflected by elevated BNP in men and also troponin/CK-MB. Correlations included smoking with leukocytosis, alcohol with increased urine density, diabetes with higher urea and lower protein, and subtherapeutic INR in cerebrovascular disease. Conclusions: Patients with ESRD on haemodialysis and anticoagulant therapy display a complex interplay of cardiovascular comorbidities, anemia, overlapping thrombotic and bleeding risks, with sex-specific differences. Therefore, systematic monitoring of proteinuria, haemoglobin, D-dimer, and coagulation markers is crucial to balance thrombotic and bleeding risks. Objective: To characterise the clinical and paraclinical profile and comorbidity–laboratory correlations of ESRD patients undergoing haemodialysis and anticoagulant therapy. Full article

Aging is a complex biological process marked by progressive physiological decline with increasing vulnerability to diseases such as cardiovascular disorders, neurodegenerative conditions, and metabolic syndromes. Identifying reliable biomarkers of aging is essential for assessing biological age, predicting health outcomes, and guiding interventions to promote healthy aging. Among various candidate biomarkers, red blood cells (RBCs) offer a unique and accessible window into the aging process due to their abundance, finite lifespan, and responsiveness to systemic changes. This review examines the potential of RBCs as biomarkers of aging by exploring their age-associated morphological, functional, and biochemical alterations. Age-related reduction in key haematological parameters such as RBC count, haemoglobin concentration, and haematocrit, and increases in mean cell volume (MCV) and red cell distribution width (RDW), reflect underlying shifts in erythropoiesis and cellular turnover. Functional changes include reduced oxygen-carrying capacity, decreased deformability, diminished ATP release, and increased RBC aggregation, all of which may impair both macrocirculatory and microcirculatory flow and tissue oxygenation. Biochemically, aging RBCs exhibit altered membrane lipid and protein composition, reduced membrane fluidity, and diminished antioxidant and enzymatic activity, contributing to cellular senescence and clearance. Despite these promising indicators, challenges persist in establishing RBC parameters as definitive biomarkers of aging. Inter-individual and intra-individual variability and storage-related artifacts complicate their use. In conclusion, RBCs present a compelling, though currently underutilized, avenue for aging biomarker research. Further longitudinal validation and mechanistic research are essential to support the clinical utility of RBC parameters as biomarkers of aging. Full article

Background: Anaemia in adolescents can be influenced by parasitic infections, systemic inflammation, and nutritional status. Objective: To determine whether C-reactive protein (CRP), nutritional status, and infection with Ascaris lumbricoides, Giardia lamblia, or Trichuris trichiura are associated with anaemia in adolescent athletes from Tacna compared to non-athletes. Methods: A cross-sectional study was conducted involving 250 male football players aged 13–18 years and 150 age-matched non-athletes. Haemoglobin, haematocrit, ferritin, serum iron, CRP, and parasitic status were measured; mean comparisons and logistic regression were applied. Results: Anaemia was more prevalent among athletes than non-athletes (30% vs. 18%; p < 0.001). Infected athletes showed lower haemoglobin (11.9 ± 1.1 g/dL) and higher CRP (5.0 ± 1.9 mg/L) levels compared to non-infected athletes (13.8 ± 1.0 g/dL and 2.2 ± 1.1 mg/L; p < 0.001). Logistic regression identified CRP as an independent predictor of anaemia (adjusted OR = 1.20; 95% CI: 1.08–1.38; p < 0.001), while parasitic infections showed no direct association after adjustment. Underweight status was associated with a higher prevalence of anaemia (36%). Conclusions: Systemic inflammation emerged as the main factor associated with anaemia in this population, with parasitic infections contributing indirectly by increasing inflammation. Periodic deworming, iron supplementation, and CRP monitoring are recommended to reduce the burden of anaemia in adolescent athletes from endemic regions. Full article

This study aimed to assess the extent of vitamin B₁ and B₆ vitamer loss during a single peritoneal dialysis (PD) session using a combination of chromatographic techniques and chemometric analysis. Dialysis effluent samples were collected from 41 PD patients (22 on continuous ambulatory peritoneal dialysis (CAPD) and 19 on automated peritoneal dialysis (APD)) during a standardised peritoneal equilibration test. Concentrations of thiamine monophosphate, thiamine diphosphate (ThDP), pyridoxine, pyridoxal (PL), and pyridoxamine were determined using high-performance liquid chromatography with a fluorescence detector. The analytical method was validated in terms of sensitivity, linearity, accuracy, and recovery. Multiple regression analysis was employed to identify potential clinical and demographic predictors of vitamin washout. All vitamers except pyridoxal 5-phosphate (PLP) were detectable in dialysis effluents. ThDP exhibited the greatest loss among the B₁ forms (ca. 0.05–0.57 mg/24 h), while PL exhibited the most significant loss among the B₆ forms (ca. 0.01–0.19 mg/24 h). Vitamin losses varied depending on the dialysis modality (continuous ambulatory peritoneal dialysis, or CAPD, versus automated peritoneal dialysis, or APD) and the peritoneal transport category. Regression analysis identified body weight, haemoglobin, and haematocrit as independent predictors of ThDP washout (R² = 0.58). No statistically robust models were established for the other vitamers. Even short medical procedures (such as single PD) can result in measurable losses of water-soluble vitamins, particularly ThDP and PL. The results emphasise the importance of personalised vitamin supplementation for PD patients and suggest that body composition and haematological parameters significantly influence the loss of thiamine. Full article

Strength training has established itself as an essential component in physical conditioning programmes, not only to improve sports performance, but also for health purposes. To evaluate the effects of a strength training protocol with a predominance of the eccentric component on blood count, blood chemistry, and quadriceps muscle ultrasound in university students. 31 students (22.3 ± 4.14 years) of the professional programme in Sports of the Politécnico Colombiano Jaime Isaza Cadavid participated. A mesocycle was developed with three weekly sessions of eccentric training focused on the lower body and core zone. Pre and post-intervention measurements were taken anthropometry, haemogram, lipid profile, ultrasound of the right quadriceps, Bosco test, and Rockport test. The Wilcoxon signed-rank test was used, and the effect size was calculated using rank correlation. Statistically significant changes were observed in haematocrit, mean corpuscular volume, HDL, muscle thickness and echo-intensity, vertical jump power, and maximal oxygen consumption. A four-week eccentric strength training programme generates improvements in haematology, lipid profile, muscle quality assessed by ultrasound, and functional performance in university students. Full article

Background: A comparative analysis was conducted between two immunisation protocols using different amounts of protein extracts from adult Haemonchus contortus worms, purified by thiol-Sepharose chromatography (625 μg/animal vs. 200 μg/animal). These protocols involved either five or two inoculations of the immunogen, respectively. Methods: To evaluate the level of immunoprotection, animals were challenged with L3 of H. contortus two weeks after the last inoculation of the immunogen and humanely sacrificed at 8 weeks post-infection. Parasitological, biopathological, and serological parameters were monitored through the experiment. Parasite burden, abomasal-specific antibody responses, and histopathological changes were determined at the end of the trial. Results: The immunisation protocols resulted in similar reductions in cumulative faecal egg counts (60.5–64.9%) and the total worm burden (47.5–50%) compared to non-immunized (control) animals. Overall, these parasitological data showed an early recovery of the haematocrit (PCV) after challenge in the immunised groups relative to control. Similarly, levels of H. contortus-specific IgG and IgA antibodies increased in both the serum and gastric mucus of immunised groups. Conclusions: These findings represent a further step towards the potential application of this type of immunogen under field conditions, as protective responses (associated with a reduction in faecal egg output) were achieved using a simplified protocol, with lower immunogen doses and fewer inoculations required to induce immunoprotection, thereby mitigating the pathological effects of the parasite and reducing its ability to spread and infect susceptible hosts. Full article

Objectives: This study aimed to analyse the haematological parameters in relation to subjective tinnitus. We hypothesise that abnormal haematological findings may correlate with increased severity and chronicity of tinnitus. This research could lead to improved diagnostic methods and more targeted treatments. Material and Methods: A total of 439 patients with primary subjective tinnitus and 274 individuals without tinnitus were enrolled. These participants underwent comprehensive laboratory testing, which included haematological parameters. Results: When comparing the white blood cell levels between the tinnitus group and the control group, no statistically significant differences were found (p = 0.743). Similarly, comparisons of red blood cell levels (p = 0.250), haemoglobin levels (p = 0.087), and haematocrit levels (p = 0.066) also revealed no significant differences. The platelet levels showed no significant difference between the two groups (p = 0.782). According to a logistic regression model, lower levels of haemoglobin (p = 0.000) and platelets (p = 0.000) significantly predicted higher scores on the Tinnitus Handicap Inventory, indicating self-reported tinnitus severity. Furthermore, lower haemoglobin levels were significant predictors (p = 0.04) of developing bilateral tinnitus. Using Spearman’s correlation test, a statistically significant negative correlation (p = 0.029) was observed between red blood cell levels and the onset of tinnitus. The frequency of tinnitus demonstrated a significant positive correlation with haemoglobin levels (p = 0.04) and haematocrit levels (p = 0.043). Conversely, platelet levels showed a significant negative correlation with both tinnitus intensity (p = 0.002) and the onset of tinnitus (p = 0.033). Conclusions: While the haematological parameters showed no significant differences between the tinnitus and control groups, further analyses indicated that certain parameters, such as haemoglobin and haematocrit levels, could potentially influence tinnitus, necessitating further investigation. Full article

The evaporation of a blood sessile droplet on a solid substrate generates distinctive desiccation patterns. These patterns have been identified as a potential tool for interpreting the pathological information of donors, since their morphological features encode pathological indicators linked to blood-related disorders. We collected two representative sets of blood samples from anonymous patients: healthy donors (normal haematocrit) and anaemia patients (low haematocrit). Our real-time observations of the morphological evolution during desiccation reveal distinct differences in pattern development. The macroscopic analysis indicates that blood sessile droplets from anaemia patients with abnormally low haematocrit levels experience divergent morphological trajectories, forming cracking patterns distinguishable from those of healthy donors. Our microscopic comparisons show that the blood desiccation patterns of healthy donors exhibit a longer coronal region and greater deposit coverage in the central region than those of anaemia patients. Our further analysis correlates these morphological variations to the effects of the haematocrit level of blood samples on material redistribution. This work proposes a facile strategy for health diagnostics through blood desiccation pattern analysis, highlighting its potential as a foundation for diagnostic platforms. Full article