Serum Concentrations Of Protein Research Articles

Comparative assessment of neurotrophic proteins in vibration disease

Introduction. The problem of health impairment due to the impact of physical factors, including vibration disease (VD), retains medical and social relevance due to the significant specific gravity in the structure of occupational morbidity and high prevalence. Under vibration exposure, the acid-base equilibrium, immune status are disturbed, rheological properties and properties of the neurohumoral system, as well as functional indices of the central and peripheral nervous system change. Neurotrophins are known to play an important role in regulating the development and functioning of the central and peripheral nervous systems. In this regard, research is needed to determine in VD patients the levels of neurospecific proteins, which may serve as one of the markers for tracing changes in the nervous system in workers. The aim of the study was to identify the peculiarities of changes in neurospecific proteins (BDNF, S100β, and MBP) in the serum of patients with VD of different genesis. Materials and methods. Serum concentrations of neurotrophic proteins: brain neurotrophic factor – BDNF, S100β protein and myelin basic protein (MBP) were studied by solid-phase enzyme-linked immunoassay. Results. There was an increase in serum BDNF, S100β protein, and MBP concentrations in persons with VD due to combined exposure to local and general vibration, and an increase in MBP was observed in patients with VD due to exposure to local vibration. Limitations. The limitations of this work are small groups of employees. Conclusion. As a result of studies, it can be assumed that in VD due to exposure to combined vibration, changes are observed in the peripheral and central parts of the nervous system, and in VD due to local vibration, disorders seem to be mainly associated with the peripheral nervous system. The general pattern of the revealed disorders in the content of MBP lies in the neurodestructive processes occurring in the nerve fibers in patients with VD, regardless of genesis. Summarizing the above mentioned, the validity of studying the concentration of neurospecific proteins in vibration disease occurring with damaging processes in the nervous tissue should be recognized.

B-102 The Impact of Protein / Protein Interactions on Serum Free Light Chain Assay Calibration

Abstract Background Since 2001, Serum Free Light Chain measurements have become established as routine clinical laboratory tests. Katzmann (2002) published a reference interval based on 282 normal samples establishing a ratio reference range 0.26-1.65. Whilst kappa and lambda measurements are of little diagnostic value, kappa/lambda ratio gives a strong indication of monoclonal gammopathy. In recent years, it has been suggested that the ratio may have changed. Here we present investigations identifying protein/protein interactions that may account for the discrepancies between QC release and real-world data; identifying a remediation step which will allow verification of the published ratio. Methods The manufacturers QC release data was reviewed for kappa, lambda and kappa/lambda ratio for all lots from 2018-2023, and compared to published data. To mimic field observation, an accelerated stability study was performed on standard calibrators and protein/protein interactions identified using western blot. Subsequently, calibrators were depleted of alpha-1 antitrypsin (A1AT) and other serum proteins using specific affinity chromatography; accelerated stability was repeated. A calibrator of pure polyclonal free light chains (FLC) in human serum albumin was produced in the presence/absence of A1AT and additional interfering serum proteins. Results At release, the average kappa reference range was 7.2-29.5 mg/L (62 kits, 9 different US blood donor sera collections and 3852 data points) and 7.7-24 mg/L for lambda (78 kits, 9 different US blood donor sera and 4664 data points), with a kappa/lambda ratio of 0.45-1.69. There was minimal change over 5yrs to these measurements. Analysis of FLC calibrators during an accelerated stability identified interactions between kappa FLC and ubiquitous serum proteins, including A1AT. The standard calibrator activity declined by 14.9±0.1% (mean±SEM) over a 4-month accelerated period @22oC, equivalent to 16 months real time. Calibrators depleted of A1AT and specific additional serum proteins showed significantly less decline in activity 1.4±1.4%, p<0.001. When blood donor sera were analysed using the standard calibrators following 4 months at 22oC, the results showed an increase in the reported kappa concentrations compared to those generated from frozen calibrators (19.0[15.4-22.5] to 21.3[17.0-26.0] mg/L, 12.5±3.8%, p<0.001). This observation was mirrored in kappa/lambda ratio (1.3[1.1-1.5] to 1.4[1.2-1.7] mg/L, 12.5±3.8%, p<0.001) and when clinical patient samples were assessed (30.1[14.0-47.1] to 34.3[15.5-56.9] mg/L, 13.8±1.4%, p<0.001). The depleted calibrator did not report an increase in sample results. FLC+HSA calibrators, when spiked with either physiological concentrations of A1AT or other serum proteins, showed a 16.7% and 15.3% decrease in activity respectively, compared to FLC+HSA calibrators without additional proteins. Conclusions At release, US blood donor sera have different absolute kappa mg/L compared to the published reference interval, but these changes do not invalidate the published kappa/lambda ratio, in contrast to recent reports and have not changed since 2018. An unpredictable kappa/protein interaction was observed, particularly with A1AT in a time dependent fashion, which correlated to a reduction in calibrator activity. Removal of A1AT and other specific serum proteins remediated the issue, and the kappa/lambda ratio was verified irrespective of the age of the calibrator.

Impact of dietary L-carnitine supplementation on blood parameters and duodenal alterations in laying hens at the end of production

L-carnitine is an important nutritional supplement in the poultry industry, contributing to improved growth, production, and overall health of the birds. However, by the end of the production cycle, the endogenous synthesis of L-carnitine (LC) is often insufficient. This study aimed to evaluate the effects of dietary L-carnitine supplementation on blood parameters and duodenal structure in Ross laying hens during the last production phase. A total of 40 Ross strain laying hens, aged 70 weeks, were selected. The control group was administered a basal diet, while the experimental groups received the same diet supplemented with 100, 250, or 500 mg of L-carnitine per kg of the basal diet. The experimental period lasted for 56 days. Serum concentrations of cholesterol and total protein were not significantly affected by L-carnitine supplementation; however, triglyceride concentration and LDL levels were notably reduced. Furthermore, L-carnitine supplementation enhanced the villus perimeter and increased the villus length/crypt depth ratio. Importantly, the supplementation of 250 mg/kg of L-carnitine had a positive impact on duodenum structure and led to decreased levels of AST and ALP. In conclusion, the incorporation of 250 mg/kg of L-carnitine into the diet of laying hens significantly improved duodenal structure, reduced lipid peroxidation, and demonstrated antioxidant effects.

A New Strain of Saccharomyces cerevisiae in Diets of Lactating Holstein Cows Improved Feed Efficiency and Lactation Performance

Abstract This study compared the effects of feeding a new strain of Saccharomyces cerevisiae HSA2020 with a commercial strain on in vitro rumen fermentation and production performance of dairy cows. Permeate was used as a substrate for the laboratory production of the new strain of S. cerevisiae after the hydrolysis by β-galactosidase (5000 µ/mL at 37°C). Two experiments were conducted: in Experiment 1, the effects of three levels (1, 2 and 3 g/kg dry matter) of S. cerevisiae on in vitro ruminal fermentation kinetics were evaluated. In Experiment 2, for 60 days, sixty multiparous Holstein cows (639±24.8 kg BW, 3±1 parity, 7±1 days in milk, with a previous milk production of 23±2.0 kg/d) during the previous lactation, were randomly assigned to 3 treatments in a completely randomized design. Cows were fed without any additives (control treatment) or supplemented with 2 g/kg feed daily of laboratory produced (PY) or commercial (CY) S. cerevisiae. In Experiment 1, inclusion of PY and CY increased (P<0.05) gas production, propionate, and nutrient disappearance, while decreased (P<0.05) methane production and protozoal count. Moreover, in Experiment 2, PY followed by CY increased (P<0.01) nutrient digestibility, and serum concentrations of total protein, albumin, and glucose (P<0.05). Higher daily milk yield, and milk energy output were observed with PY and CY without affecting concentrations of milk components or milk fatty acid profile. Compared to control, increased feed efficiency was observed with PY and CY. Compared to PY, CY increased serum concentrations of urea-N and decreased triglycerides, while PY decreased serum aspartate transaminase and increased concentration of conjugated linoleic acids in milk. In early lactating cow diets, both strains of S. cerevisiae improved production performance at 2 g/kg, and minimal differences between strains were found.

Evaluation of potential novel biomarkers for feline hypertrophic cardiomyopathy

Hypertrophic cardiomyopathy (HCM) is the most common cardiomyopathy in cats. The diagnosis can be difficult, requiring advanced echocardiographic skills. Additionally, circulating biomarkers (N-terminal pro-B type natriuretic peptide and cardiac troponin I) have several limitations when used for HCM screening. In previous work, we identified interleukin 18 (IL-18), insulin-like growth factor binding protein 2 (IGFBP-2), brain-type glycogen phosphorylase B (PYGB), and WNT Family Member 5 A (WNT5A) as myocardial genes that show significant differential expression between cats with HCM and healthy cats. The products of these genes are released into the circulation, and we hypothesized that IL-18, IGFBP-2, PYGB, and WNT5A serum RNA and protein concentrations differ between healthy cats, cats with subclinical HCM, and those with HCM and congestive heart failure (HCM + CHF).Reverse transcriptase quantitative polymerase chain reaction (RTqPCR) and enzyme-linked immunosorbent assay (ELISA) were applied to evaluate gene and protein expression, respectively, in the serum of eight healthy controls, eight cats with subclinical HCM, and six cats with HCM + CHF. Serum IGFBP-2 RNA concentrations were significantly different among groups and were highest in cats with subclinical HCM. Compared to healthy controls, serum IL-18 and WNT5A gene expression were significantly higher in cats with HCM + CHF, and WNT5A was higher in cats with subclinical HCM. No differences were observed for PYGB.These results indicate that further investigation via large scale clinical studies for IGFBP-2, WNT5A, and IL-18 may be valuable in diagnosing and staging feline HCM.

Synergistic Benefits of Dietary Silymarin and Selenium on Growth, Immune Functions, Antioxidants, and Gut/Liver Health of Thinlip Mullet (Liza ramada) Juveniles

Abstract This study investigates the synergistic impact of silymarin (SI) levels combined with inorganic selenium (sodium selenite: Se) on growth, feed utilization, biochemical parameters, antioxidants, innate immunity, intestinal and liver histology, and gene expression of thinlip mullet (Liza ramada) juveniles. The experimental design involved thinlip mullets initially weighing 3.5±0.13 g, distributed in a completely randomized design with 30 fish per hapa (0.5 × 0.5 × 1 m), and conducted in triplicate over 60 days. Seven experimental diets were employed, including a control (without SI and Se supplementation), a negative control (with only Se supplementation), and four treatments with varying levels of silymarin (250, 450, 650, 850 mg/kg) alongside selenium (0.5 mg/kg diet). The growth performance results highlighted significant enhancements in final body weight, weight gain, and specific growth rate, particularly in the SI 850 mg/kg + Se treatment. Survival rates, feed intake, and feed conversion ratios showed positive trends across the SI-Se supplemented groups. Biochemical profiles of serum exhibited that the control diet induced elevated concentrations of glucose, cholesterol, alanine aminotransferase, aspartate aminotransferase, and urea, while Se or SI supplementation significantly mitigated these levels, with the lowest concentrations observed in the SI-Se supplemented groups. Moreover, SI supplementation increased serum protein content. Antioxidant enzyme activities, represented by superoxide dismutase (SOD), catalase (CAT), and catalase (GPx), demonstrated notable improvements in the SI-Se fortified groups, with significantly elevated GPx activity compared to the Se-supplemented and control groups. Immune system responses, including lysozyme, bactericidal, nitro-blue tetrazolium (NBT%), and serum alternative complement pathway (ACH50) activities, were highest in the SI-Se augmented groups. SI and Se in L. ramada reduce liver pro-inflammatory gene expression (IL-1 β, hepcidin) vs. control group. Histological examinations of the intestine and liver depicted structural enhancements, especially at moderate and high levels of SI with Se supplementation. The results indicate improved intestinal villi morphology and hepatic architecture, supporting the positive influence of dietary treatments on the health of thinlip mullet juveniles. In conclusion, the combined supplementation of SI at 850 mg/kg diet and Se at 0.5 mg/kg diet positively influenced the growth, biochemical profiles, antioxidant status, immune responses, gene expression, and histological integrity of thinlip mullet juveniles, providing valuable insights for optimizing aquafeed formulations.

Decoding the genetic influence of CT60 non-coding polymorphism in CTLA-4 gene and sCTLA-4 biomarker with rheumatoid arthritis in the Indian population.

Cytoplasmic T Lymphocyte Antigen - 4 (CTLA-4) gene encodes an immunoregulatory receptor expressed on surface of activated T-cells to mediate peripheral tolerance against self-antigen. It suppresses auto-reactive T-cell proliferation either by inactivation or apoptosis of T-cells. The CTLA-4 mRNA undergoes alternative splicing to synthesize a native soluble form of CTLA-4 (sCTLA-4) protein, which lacks exon 3 that encodes for transmembrane region. As a result, sCTLA-4 circulates as a soluble serum protein and acts as an immunoregulator molecule to maintain homeostasis in the blood. Techniques coupled with quantitative Polymerase Chain Reaction (qPCR) and High-Resolution Melting Analysis (HRMA) were used to screen CTLA-4 3'Untranslated Region (UTR) CT60 (A/G) rs3087243 Single Nucleotide Polymorphism (SNP) and their association with Rheumatoid Arthritis (RA) in the Indian population. In addition, we also evaluated the concentration of sCTLA-4 serum protein in RA patients carrying rs3087243 SNP with different genotypes (A/A, G/A, and G/G). Statistical analysis of Odds Ratio (OR), Confidence Interval (C.I), and Relative Risk (RR) have shown that frequency of CTLA-4 rs3087243 SNP G/G genotype was significantly associated with RA in the Indian population (OR 1.7140; CI = 1.0765 to 2.7290; RR = 1.5434; p = 0.0232). The sCTLA-4 concentration was also significantly lower in RA patients carrying rs3087243 SNP G/G genotype than control group (p < 0.001). Co-inheritance of CTLA-4 signal peptide and 3'UTR SNPs may activate RAPP pathway. Downregulation of CTLA-4 and sCTLA-4 serum protein by rs3087243 SNP can increase the hyperactivation of T-cells, which causes RA.

Evaluation of a host-protein signature score for differentiating between bacterial and viral infections: real-life evidence from a German tertiary hospital.

A host-protein signature score, consisting of serum-concentrations of C-reactive protein, tumour necrosis factor-related apoptosis-inducing ligand, and interferon gamma-induced protein 10, was validated for distinguishing between bacterial and viral infections as an antimicrobial stewardship measure for routine clinical practice among adult patients in a German tertiary hospital. This single-centre, explorative study prospectively assessed the host-protein signature score, comparing it with serum procalcitonin (PCT) in patients with blood stream infections (BSI) and evaluating its efficacy in patients with viral infections against the standard of care (SOC) to assess the need for antibiotics due to suspected bacterial super/coinfection. Manufacturer-specified threshold scores were used to differentiate viral (< 35) and bacterial (> 65) infections. Ninety-seven patients (BSI [n = 56]; viral infections [n = 41]) were included. The score (cut-off score > 65) tended to detect BSI with higher sensitivity than did PCT (cut-off > 0.5 ng/mL) (87.5% vs. 76.6%). Three patients (5.4%) with BSI had a score < 35. One patient with BSI did not receive antibiotic treatment following SOC prior to positive blood culture results. Among patients with viral infections, 29 (70.7%) had scores > 65, indicating bacterial superinfections. Additionally, 11 patients (26.8%) had scores < 35, indicating no bacterial superinfections. In total, the antibiotic treatment discrepancy in the viral group between the SOC and a host-protein signature score guided approach was 2/41 patients (4.9%). The score tended towards a higher sensitivity in detecting BSI than that with PCT. However, its impact on reducing antibiotic use in viral infections was minor compared with that of SOC.

Exploring the Role of the TAS2R16 Protein and Its Single Nucleotide Variants in Pituitary Adenoma Development.

Pituitary adenoma (PA) is a common benign tumor that develops in the pituitary gland, causing hormonal imbalances and potential health issues. The TAS2R16 gene codes for a taste receptor and is involved in bitter taste perception, but there is currently no known direct link between this gene and pituitary adenoma. This study included 221 healthy controls and 131 patients with pituitary adenoma (PA) from the Lithuanian population. DNA was isolated from peripheral venous blood using the salt precipitation method. Genotyping was performed via RT-PCR. Statistical analysis was conducted with IBM SPSS Statistics 29.0 software, incorporating the Bonferroni correction for multiple comparisons. This study found that the TAS2R16 rs978739 C allele is less common in the non-invasive PA group compared to the control group (p = 0.045). The TAS2R16 rs860170 CT genotype reduces the likelihood of developing non-invasive PA by 1.9-fold under the codominant (p = 0.024) and overdominant (p = 0.030) models. The odds of developing non-invasive PA are reduced by 2-fold under the dominant (p = 0.021) model for TAS2R16 rs860170 CT + CC genotypes and by 2-fold under the additive (p = 0.018) model for each TAS2R16 rs860170 C allele. The PA group had higher serum levels of TAS2R16 than the control group (p < 0.001). The present study found that patients with the TAS2R16 rs978739 TT or CT genotype had higher serum TAS2R16 levels and protein concentrations than healthy individuals (p = 0.025 and p = 0.019, respectively), and those with the AA or AG genotype of TAS2R16 rs1357949 had higher protein concentrations (p = 0.005 and p = 0.007, respectively). The TAS2R16 rs978739 C allele was less common in the non-invasive PA group compared to the control group, while the TAS2R16 rs860170 CT genotype was linked to a reduced likelihood of developing non-invasive PA. Additionally, the PA group showed higher serum levels of TAS2R16, and increased serum protein concentrations were observed in PA patients with specific TAS2R16 variants.

Dietary impact of West African black pepper (Piper guineense) and turmeric (Curcuma longa) on the growth performance, carcass traits, haemato-biochemical profile, and oxidative stress markers of broiler chickens

This study evaluated the dietary impact of West African black pepper (WABP; Piper guineense) and turmeric (Curcuma longa) on the growth performance, carcass traits, haemato-biochemical profile, and oxidative stress markers of broiler chickens. A total of 200 one-day-old male broiler chicks (Ross 308) were allocated to 4 dietary treatment groups (T1, T2, T3, T4) of 5 replicates (10 birds per replicate) in a completely randomised design for a 49-day study. Broiler birds in T1 (control) were fed basal diet (BD), T2 (BD + 5 g turmeric/kg), T3 (BD + 5 g WABP/kg), and T4 (BD + 2.5 g turmeric and 2.5 g WABP/kg). This study found (p < 0.05) that feed intake (FI) and feed conversion ratio (FCR) were significantly altered during the starter phase, while no significant effect was observed in body weight gain (BWG). BWG, FI, and FCR were not significantly affected (p > 0.05) during the finisher and overall phases. Except for haemoglobin and red blood cell count in the finisher phase, haematological measures were not affected (p > 0.05). During the starter phase, aspartate aminotransferase decreased (p < 0.05) and high-density lipoprotein (HDL) increased (p < 0.05) across the treatment groups fed Piper guineense and Curcuma longa compared with those in the control group. In the finisher phase, all the serum biochemistry parameters, except for the serum protein content were significantly (p < 0.05) impacted. Piper guineense and Curcuma longa significantly (p < 0.05) increased superoxide dismutase and reduced (p < 0.05) malondialdehyde during the starter phase across the treatment groups, with no significant (p > 0.05) effect on catalase and glutathione. Superoxide dismutase, catalase, and glutathione were significantly (p < 0.05) increased while malondialdehyde significantly decreased (p < 0.05) during the finisher phase when compared to the control group. Conclusively, these findings suggest the potential health benefits of these dietary additives in broiler chicken nutrition to enhance overall health and performance.

Investigation of Hepatozoon Canis Related Alterations in the Haemato Biochemical Profile of Dogs

Aims: Hepatozoonosis, caused by a protozoan parasite Hepatozoon canis, is important for canine health due to its ability to cause chronic, debilitating disease, and the challenges it presents in terms of diagnosis and management. The present study was conducted to see the effect of H. canis infection on various haematological and biochemical parameters as compared to the normal healthy dogs in order to understand the disease pattern and suspecting the disease. Study Design: The clinically affected dogs that come to the veterinary hospital with symptoms of hepatozoonosis were included in the study. Haematological and biochemical parameters of dogs found positive for hepatozoonosis were analysed. The values of these parameters were subsequently compared to healthy animals in order to identify any significant difference caused by H. canis. Place and Duration of Study: The studied was conducted at Department of Veterinary Medicine, DUVASU Mathura, India. Total 212 blood samples were collected from the dogs that were brought for the treatment in between February 2023 to March 2024. Methodology: Total 212 dogs were included in the present study out of this 46 dogs were found positive with H. canis using PCR based molecular test. These positive animals were subjected to study the changes in biochemical parameters like blood urea nitrogen, creatinine, alkaline phosphatase, alanine transaminase, aspartate amino transferase, total leucocyte count, total erythrocyte count, haemoglobin, haematocrit, erythrocyte indices (MCV, MCH, MCHC), differential leucocyte count, platelet count and platelet indices (MPV, PDW) using autoanalyzer. Student's t-test in Graphpad Prism was used to compare these values to healthy animals. Results: The study confirms that Hepatozoonosis leads to significant haematological and biochemical changes in dogs. Infected dogs have lower Hb, TEC, and PCV than healthy animals, indicating anaemia. Thrombocytopenia and leukocytosis were also observed in the infected animals. Non-significant differences in MCV, MCH, and MCHC indicate normocytic, normochromic anaemia. Anisocytosis and non-regenerative anaemia is indicated by significant RDW-CV increases with decrease in MCV values. Increased liver-specific enzymes like ALT, AST, and ALP and kidney-related enzymes like BUN and CRT suggest hepatic and renal involvement in disease pathophysiology. Conclusion: In hepatozoonosis, haemato- biochemical parameters like non-regenerative anaemia. anisocytosis, thrombocytopenia, leukocytosis, low serum protein concentration and increased ALT, AST, ALP and BUN values may be used as non-specific biomarkers. The results can be used in making clinical decisions and monitoring therapeutic responses in cases of hepatozoonosis.

Vitamin D and CRP are associated in hospitalized inflammatory bowel disease (IBD) patients in Shanghai.

Patients with inflammatory bowel disease (IBD) are more likely to be confirmed with vitamin D deficiency. However, the association between inflammation and vitamin D remains unclear. The purpose of this study was to evaluate the association between inflammation and vitamin D in hospitalized patients with IBD. All the participants were recruited from one teaching hospital from June 2018 to October 2022. Inflammation was evaluated by serum concentration of C-reactive protein (CRP), using an immunoturbidimetric method at admission. We further divided the participants into five groups based on serum CRP levels: <5, 5-9.9, 10-19.9, 20-39.9, and >40mg/L. Serum 25-hydroxy-vitamin D (25-(OH)-D) was assessed by liquid chromatography tandem mass spectrometry. Addi-tional information, including age, sex, body mass index (BMI), IBD (ulcerative colitis vs. Crohn's disease) subtype, was abstracted from medical records. This study included 1,989 patients with IBD (average age was 39.4 years, 33.8% of them were women, 1,365 CD and 624 UC patients). The median CRP was 5.49 mg/L (range of quartiles: 1.64~19.5 mg/L) and the prevalence of 25-(OH)-D deficiency was 69.8%. CRP was significantly associated with serum level of 25-(OH)-D. The difference in 25-(OH)-D was -4.28 ng/ml (-5.27 ng/ml, -3.31 ng/ml) between two extremist CRP groups after adjustment of potential covariates (age, sex, BMI, type of IBD, dietary type, season, and lymphocyte count). Subgroup analysis in sex, type of IBD, and age, were similar to the main analysis results. There was a negative association between CRP levels and vitamin D in hospitalized patients with IBD.

Serum retinol binding protein 4 in individuals with essential hypertension and type 2 diabetes: A cross-sectional study.

Cardiometabolic disorders, notably primary hypertension and type 2 diabetes, present substantial global health challenges. The intricate interplay between metabolic and cardiovascular pathways has prompted extensive research into molecular mechanisms linking these conditions. The adipokine Retinol Binding Protein 4 (RBP4), initially recognized for retinol transport, has emerged as a potential biomarker in the network of metabolic and cardiovascular dysfunction. Recent studies implicate RBP4 in insulin resistance and its complications, including hypertension. This study explores RBP4 dynamics in patients with primary hypertension and type 2 diabetes, aiming to contribute valuable insights into diagnostic and therapeutic advancements in managing these interconnected disorders. This cross-sectional study, conducted over 2 years in a tertiary healthcare centre of North India, aimed to investigate the serum concentration of Retinol Binding Protein 4 (RBP4) in 119 participants diagnosed with primary hypertension and type 2 diabetes. Ethical guidelines were strictly followed, and comprehensive clinical assessments, including blood pressure measurements, were performed. RBP4 levels were quantified using an ELISA kit, alongside markers of insulin resistance. Statistical analyses, involving t-tests and correlation assessments, sought to unravel potential associations between RBP4, insulin resistance, and blood pressure parameters using SPSS 20.0. The study comprised 61 healthy control (HC) participants and 58 individuals diagnosed with both essential hypertension and type 2 diabetes (EH+T2D). EH+T2D participants were on average older (45.71 ± 9.29 years vs. 40.34 ± 9.47 years, P = 0.002). Dyslipidemia prevalence was markedly higher in EH+T2D (72.4% vs. 11.4%, P < 0.0001), accompanied by disrupted lipid profiles. Serum RBP4 concentration was significantly elevated in EH+T2D (49.17 ± 19.37 mg/L, P < 0.0001), suggesting its potential role in the shared pathophysiology of primary hypertension and type 2 diabetes. Pearson's correlation analysis revealed associations between RBP4 levels, metabolic, and cardiovascular parameters, underscoring its potential as a link between these conditions. Elevated serum RBP4 levels suggest its potential as a novel biomarker in the shared pathophysiology of primary hypertension and type 2 diabetes. The correlation analysis highlights the intricate interplay between metabolic, lipid, and cardiovascular parameters, emphasizing the need for holistic interventions.

Acute phase reactants

The serum concentrations of certain proteins are altered in various conditions such as infection, trauma, inflammatory arthritis, malignancy, autoimmune and systemic inflammatory diseases. These proteins are known as positive or negative acute phase reactants. While albumin and transferrin belong to the negative acute phase reactants, alpha-1-acid glycoprotein, alpha-1-antitrypsin, alpha-2-macroglobulin, C-reactive protein, ceruloplasmin, haptoglobin, serum amyloid A and fibrinogen are known as positive acute phase reactants. This review discusses the clinical use of C-reactive protein, erythrocyte sedimentation rate and procalcitonin.

In vitro and in vivo modulatory effects of fluoxetine on gene expression and antioxidant enzymes in CFA-induced chronic inflammatory model: drug repurposing for arthritis.

Fluoxetine, being a selective serotonin uptake inhibitor, has been broadly used to modulate the neurotransmission of serotonin in the central nervous system. Fluoxetine performs a number of crucial central nervous system-related tasks, including neuroprotective effects against microglial neurotoxicity and protecting oxidative cell damage produced by stress in a variety of stress-related unfavourable health disorders. Studies have shown that the drug (fluoxetine) also has analgesic and anti-inflammatory characteristics in addition to its other basic benefits. Furthermore, existing treatment approaches (NSAIDs, DMARDs, corticosteroids and other immunosuppressants) for RA have limited effects on chronic immunological models. These facts served as the basis for carrying out a study on fluoxetine to explore its therapeutics in a chronic inflammatory rat model called Freund's complete adjuvant (FCA)-induced arthritis. The therapeutic effect of the fluoxetine in FCA-induced arthritic rats was assessed by paw volume, paw diameter, arthritic index and body weight at specific days through the experiment of 28days. These findings were further co-investigated by haematological, biochemical parameters and radiographic imaging at the end of experiment. Furthermore, the modulatory effects on gene expression (NF-κB, PGE2, COX2, INF-γ, IL-4 and IL-10) and antioxidant properties were gritty using qRT-PCR and ELISA kits, respectively, in experimental arthritic rats. Fluoxetine at 10, 20 and 40mg/kg doses reduced (p < 0.001) the serum concentration of C-reactive protein and rheumatoid factor as well as suppressed the expression of PGE2, NF-kB, COX2 and INF-γ when compared to arthritic control. Moreover, fluoxetine (at higher doses) caused significant rise of IL-4 and IL-10. These findings supported the anti-inflammatory and antioxidant potential of fluoxetine in chronic inflammatory model and endorsed it for clinical trials.

The influence of the frequency of donor plasmapheresis on the concentration of ions and proteins in the blood of donors

Introduction. Plasmapheresis is a routine procedure in many blood centers. The most common complications in plasma donors are vasovagal and citrate reactions. The effects of citrate exposure, repeated with different frequency over a long period of time, have not been sufficiently studied.Aim. to research the effect of the frequency of plasmapheresis on the concentration of ionic and protein composition in donor blood.Materials and methods. The concentration of protein in blood serum was measured using a biochemical method. The concentration of ions was carried out using an automatic blood electrolyte analyzer. Plasma donors were divided into groups depending on gender and frequency of plasmapheresis (1–5 times a year; 6–10 times a year; 11–26 times a year). The total number of donors involved in the study was 274 (155 men and 119 women).Results. A significant decrease in the concentration of bound calcium was revealed in the group of female donors who donated plasma 11–26 times compared to the group who donated plasma 1–5 times a year. A significant decrease in the concentration of iron ions was revealed in the group of female donors who donated plasma 11–26 times compared to the group who donated plasma 1–5 times a year. Statistically significant differences in the concentrations of total protein were revealed between all three groups of male donors, and between groups of female donors who donated plasma 1–5 times and 6–10 times a year; 1–5 times and 11–26 times a year.Conclusion. The use of data on changes in the parameters of ion and protein metabolism in donors of different sexes and different donation frequencies reduces the risk of developing a citrate reaction due to the selective selection of plasma donors.

Label free tracking to quantify nanoparticle diffusion through biological media

Nanotechnology is a rapidly evolving field and has been extensively studied in biological applications. An understanding of the factors that influence nanoparticle diffusion in biofluids can aid in the development of diverse technologies. The development of real-time, label-free tracking technologies would allow the expansion of current knowledge of the diffusion and activity of nanoparticles. Fluorescence-based microscopy is one of the most widespread tools to monitor and track nanoparticle dynamics; however, the influence of fluorescent tags on diffusion and biological activity is still unclear. In this study, we experimentally determined the diffusion coefficient of gold nanoparticles using a label-free, optical tracking technique and evaluated the influence of protein concentration, charge and diameter on nanoparticle diffusion through biological media. We dispersed positively- and negatively-charged nanoparticles with diameters varying from 10 to 100 nm in a common cell culture media with different concentrations of serum proteins. Our results show that dynamic protein interactions influence nanoparticle diffusion in the range of serum concentrations tested. Experimental regimes to obtain quantitative information on the factors that influence the dynamics of nanoparticles in biological media have been developed.

Associations between prenatal stress with offspring inflammation, depression and anxiety

PurposeFew longitudinal studies have investigated the mediating role of inflammation during childhood in associations between prenatal maternal stress and adolescent mental health. The objective of this study was to examine the associations between prenatal maternal stress, concentrations of immune markers at age 9, and symptoms of generalized anxiety disorder (GAD) and depression during adolescence. MethodsThis study included 3723 mother-child pairs from the Avon Longitudinal Study of Parents and Children (ALSPAC). Prenatal maternal stress was examined using 55 items measured during pregnancy. Inflammation was assessed using serum concentrations of interleukin-6 (IL-6) and C-reactive protein (CRP) when children were 9 years old. GAD and depression were assessed when children were 16 and 18 years of age, respectively. Analyses comprised of structural equation models. ResultsPrenatal maternal stress was associated with higher concentrations of IL-6 in childhood, and with greater symptoms of depression and GAD in adolescence. However, we did not observe associations between prenatal maternal stress and CRP; also, CRP and IL-6 were not associated with depression and GAD. There was no evidence that CRP and IL-6 mediated the associations between prenatal maternal stress and either GAD or depression. ConclusionsPrenatal maternal stress is associated with IL-6 levels in childhood, and with GAD and depression during adolescence. Future studies should examine immune activity at multiple points during development in relation to mental health into adulthood to determine whether inflammation at different points during development could increase risk for mental health problems among children whose mothers experienced significant stressors during pregnancy.

Comparing the effects of various fluid resuscitative strategies on Glycocalyx damage in a canine hemorrhage model

Hemorrhagic shock and subsequent resuscitation can cause significant dysregulation of critical systems, including the vascular endothelium. Following hemorrhage, the endothelial lining (glycocalyx) can shed, causing release of glycocalyx components, endothelial activation, and systemic inflammation. A canine model of hemorrhagic shock was used to evaluate five resuscitation fluids, including Lactated Ringers+Hetastarch, Whole Blood (WB), Fresh Frozen Plasma+packed Red Blood Cells (FFP+pRBC), and two hemoglobin-based oxygen carrier (HBOC) fluids, for their impact on glycocalyx shedding. Under anesthesia, purpose-bred adult canines were instrumented and subjected to a controlled hemorrhage with blood being drawn until a mean arterial pressure of <50 mmHg was reached or 40 % of the estimated blood volume was removed. Canines were left in shock for 45 mins before being resuscitated with one of the resuscitation fluids over 30 mins. Following resuscitation, the dogs were monitored up to 2 weeks. Following an additional 3–4 weeks for washout, the canines repeated the protocol, undergoing each resuscitation fluid individually. Blood samples were collected during each round at various timepoints for serum isolation, which was used for detection of glycocalyx biomarker. Comparison of baseline and post-hemorrhage alone showed a significant reduction in serum protein (p<0.0001), heparan sulfate (p<0.001), and syndecan-1 (p<0.0001) concentrations, and a significant increase in hyaluronan (p<0.0001) concentration. Intercomparisons of resuscitation fluids indicated minimal differences in glycocalyx markers over time. Comparisons within each fluid showed dynamic responses in glycocalyx biomarkers over time. Relative to individual baselines, syndecan-1 was significantly reduced after resuscitation in most cases (p<0.0001), excluding WB and FFP+pRBC. In all cases, VE-cadherin was significantly elevated at 24 hr compared to baseline (p<0.001). Hyaluronan was significantly elevated by 3 hr in all cases (p<0.01), except for HBOC fluids. Total glycosaminoglycans were significantly reduced only at 3 hr (p<0.001) for non-HBOC fluids. Similarly, heparan sulfate was significantly reduced with all fluids between resuscitation and 24 hr (p<0.01), except WB. The temporal changes in canine glycocalyx biomarkers were atypical of hemorrhage response in other species. This suggests that the hemorrhage lacked severity and/or typical glycocalyx biomarkers do not reflect the canine endothelium compared to other species. Further research is needed to characterize the canine endothelium and the response to resuscitation fluids.

The PerioGene North Study Uncovers Serum Proteins Related to Periodontitis

The sequalae of periodontitis include irreversible degradation of tooth-supporting structures and circulatory spread of inflammatory mediators. However, the serum protein profile in periodontitis is not well described, which is partly attributable to the limited number of studies based on large and well-characterized periodontitis cohorts. This study aims to identify novel, circulating inflammation-related proteins associated with periodontitis within the PerioGene North case-control study, which includes 478 cases with severe periodontitis and 509 periodontally healthy controls. The serum concentrations of high-sensitivity C-reactive protein (hs-CRP) and a panel of 45 inflammation-related proteins were analyzed using targeted proteomics. A distinguishable serum protein profile was evident in periodontitis cases. The protein pattern could separate cases from controls with a sensitivity of 0.81 and specificity of 0.81 (area under the curve = 0.87). Adjusted levels for hs-CRP and 24 of the 45 proteins were different between cases and controls. High levels of hs-CRP and matrix metalloproteinase–12, and low levels of epidermal growth factor (EGF) and oxidized low-density lipoprotein receptor 1 (OLR-1) were detected among the cases. Furthermore, the levels of C-C motif chemokine–19, granulocyte colony-stimulating factor–3 (CSF-3), interleukin-7 (IL-7), and hs-CRP were significantly higher in cases with a high degree of gingival inflammation. The levels of CSF-3 and tumor necrosis factor ligand superfamily member–10 TNFSF-10 were higher in cases with many deep periodontal pockets. The PerioGene North study includes detailed clinical periodontal data and uncovers a distinct serum protein profile in periodontitis. The findings of lower EGF and OLR-1 among the cases are highlighted, as this has not been presented before. The role of EGF and OLR-1 in periodontitis pathogenesis and as possible future biomarkers should be further explored.