High-density Lipoprotein Concentrations Research Articles

Effect of Combined Oral Contraceptive Pills on Established Biomarkers of Lipid Metabolism: Systematic Review and Meta-Analysis

Background and aims: Bruton tyrosine kinase inhibitors, such as ibrutinib, are medications that are actively used for Chronic Lymphocytic Leukemia (CLL) and several lymphomas. They work by inhibiting Bruton’s tyrosine kinase therefore affecting B cell proliferation. Ibrutinib itself is associated with multiple cardiotoxicities including atrial fibrillation, ventricular arrhythmias, heart failure, and bleeding. There are well-established studies that show the incidence of atrial fibrillation with ibrutinib therapy. However, only a few reports show an association between ibrutinib therapy and advanced heart block. Methods: A systematic review was carried out involving searching in research databases including PubMed using key search terms. This was followed by a meta-analysis that compared cholesterol, high density lipoprotein, low-density lipoprotein and triglycerides in a population taking combined oral contraceptive pills containing ethinyl oestradiol/levonorgestrel at 6 months vs the baseline measurement. Results: Six studies (9 intervention groups), totalling 274 participants were analysed. Hedge’s g for the cholesterol comparison was 0.133 (95% confidence intervals -0.058, 0.324; p=0.173; I2 =74.652), which was not significant. In contrast high density lipoprotein was significantly lower, Hedge’s g -0.546 (95% confidence intervals -0.834, -0.259; p<0.001; I2 =92.546) and lowdensity lipoprotein significantly higher, Hedge’s g 0.248 (95% confidence intervals 0.055, 0.442; p=0.012; I2 =83.116 as were the triglycerides, Hedge’s g 0.667 (95% confidence intervals 0.491, 0.842; p<0.001; I2 =64.627. Conclusion: After 6 months use the combined oral contraceptive pills containing ethinyl oestradiol/levonorgestrel led to a significantly increased concentration of low-density lipoprotein and triglycerides and a significantly lower concentration of high-density lipoprotein. More research is required to investigate whether these changes are associated with an increased risk of cardiovascular disease.

SGLT2 inhibition, high-density lipoprotein, and kidney function: a mendelian randomization study.

Sodium-glucose cotransporter 2 (SGLT2) inhibition is recognized for its evident renoprotective benefits in diabetic renal disease. Recent data suggest that SGLT2 inhibition also slows down kidney disease progression and reduces the risk of acute kidney injury, regardless of whether the patient has diabetes or not, but the mechanism behind these observed effects remains elusive. The objective of this study is to utilize a mendelian randomization (MR) methodology to comprehensively examine the influence of metabolites in circulation regarding the impact of SGLT2 inhibition on kidney function. We used a MR study to obtain associations between genetic proxies for SGLT2 inhibition and kidney function. We retrieved the most recent and comprehensive summary statistics from genome-wide association studies (GWAS) that have been previously published and involved kidney function parameters such as estimated glomerular filtration rate (eGFR), urine albumin-to-creatinine ratio (UACR), and albuminuria. Additionally, we included blood metabolite data from 249 biomarkers in the UK Biobank for a more comprehensive analysis. We performed MR analyses to explore the causal relationships between SGLT2 inhibition and kidney function and two-step MR to discover potential mediating metabolites. The study found that a decrease in HbA1c levels by one standard deviation, which is genetically expected to result in SGLT2 inhibition, was linked to a decreased likelihood of developing type 2 diabetes mellitus (T2DM) (odds ratio [OR] = 0.55 [95% CI 0.35, 0.85], P = 0.007). Meanwhile, SGLT2 inhibition also protects eGFR (β = 0.05 [95% CI 0.03, 0.08], P = 2.45 × 10- 5) and decreased UACR (-0.18 [95% CI -0.33, -0.02], P = 0.025) and albuminuria (-1.07 [95% CI -1.58, -0.57], P = 3.60 × 10- 5). Furthermore, the study found that of the 249 metabolites present in the blood, only one metabolite, specifically the concentration of small high-density lipoprotein (HDL) particles, was significantly correlated with both SGLT2 inhibition and kidney function. This metabolite was found to play a crucial role in mediating the improvement of renal function through the use of SGLT2 inhibition (β = 0.01 [95% CI 0.005, 0.018], P = 0.001), with a mediated proportion of 13.33% (95% CI [5.71%, 26.67%], P = 0.020). The findings of this investigation provide evidence in favor of a genetically anticipated biological linkage between the inhibition of SGLT2, the presence of circulating metabolites, and renal function. The findings demonstrate that the protective effect of SGLT2 inhibition on renal function is mostly mediated by HDL particle concentrations in circulating metabolites. These results offer significant theoretical support for both the preservation of renal function and a better comprehension of the mechanisms underlying SGLT2 inhibition.

Lipoprotein dysfunction in patients with chronic kidney disease (CKD). Pathogenesis and treatment of CKD dyslipidemia (literature review)

Dyslipidemia develops in the initial stages of chronic kidney disease (CKD) and worsens as nephropathy progresses. The main manifestation of dyslipidemia is hypercholesterolemia, especially in nephrotic syndrome. However, with CKD of stages 4-5, it is replaced by hypertriglyceridemia in combination with an increase in blood levels of lipoproteins low and very low density. Such changes are closely related to the development of cardiovascular pathology with high mortality. The content of high-density lipoproteins (HDL) in the blood is gradually decreasing, as well as the reversible transport of cholesterol. Thus, their anti-atherogenic, antioxidant and anti-inflammatory functions are lost. The main components of HDL – apolipoproteins ApoA-I and ApoA-II, which provide functionality, are replaced by acute-phase proteins, and HDL lose their cardioprotective potential and acquire a proinflammatory and proatherogenic phenotype. According to modern concepts, HDL dysfunction, along with metabolic shifts, is largely due to epigenetic disorders affecting gene expression and partially eliminated by prescribing drugs containing microRNAs (mRNAs) or antisense nucleotides. Drugs with interfering RNAs created in recent years have been successfully used not only for the treatment of dyslipidemia in nephrological patients, but also in patients with neoplastic processes, inflammatory arthritis, degenerative diseases of the central nervous system, porphyria, hemophilia and many other diseases. The proposed review is devoted to the mechanisms of disorders of the structure and functions of HDL in patients with CKD and the correction of these disorders.

129 Selenium-form affects de novo cholesterol synthesis and catabolism of cholesterol and progesterone in the liver of beef heifers

Abstract A deficiency of selenium (Se) in soils and hence forages poses a challenge to producers in the southeast United States, necessitating supplementation of this trace mineral to the diet of pasture fed cattle. Se occurs in either inorganic (ISe) or organic (OSe) forms; ISe is conventionally available in commercial supplements, while OSe is available in grazed forages. We have investigated supplementation with either ISe or a 1:1 mixture of ISe:OSe (MIX) and demonstrated that MIX increases the relative abundance of mRNA encoding the low-density lipoprotein receptor (LDLR) and enzymes involved in de novo cholesterol synthesis in the corpus luteum, concurrent with a MIX-induced increase in systemic progesterone (P4) during the early luteal phase. We also observed a MIX-induced decrease in circulating cholesterol and low-density/very low-density lipoproteins during early gestation, and a MIX-induced increase in conceptus length at maternal recognition of pregnancy (MRP). The objective herein was to investigate the effect of form of Se (ISe versus MIX) on de novo cholesterol synthesis and cholesterol/steroid catabolism in the liver at MRP. We hypothesized form of Se would affect the abundance of transcripts that regulate synthesis, catabolism, and local concentrations of cholesterol and P4. Angus-cross heifers were supplemented with ISe or MIX for at least 90 d before insemination at observed estrus. On d 17 of pregnancy, heifers (n = 6/TRT) were killed and their reproductive tracts and conceptuses recovered. Hepatic samples were collected for qPCR analysis of mRNA transcripts encoding proteins involved in de novo cholesterol synthesis, regulation of cholesterol availability and steroid catabolism. Additionally, on d 7 and d 17 of pregnancy, we quantified systemic concentrations of high-density lipoproteins (HDL), indicative of cholesterol recycling to the liver. We quantified the relative abundance of 22 mRNAs and observed that heifers supplemented with MIX-form Se had an increase in the relative abundance of mRNA encoding the very low-density lipoprotein receptor (VLDLR, P = 0.01). Unexpectedly, we failed to detect an effect of TRT on the abundance of mRNA encoding the high-density lipoprotein receptor (SCARB1, P > 0.05) which was consistent with our inability to detect an effect on the serum concentration of total or free HDL (P > 0.05) during early pregnancy and at MRP. Of the 11 mRNA transcripts encoding enzymes involved in catabolism of cholesterol and progesterone, including steroid alpha reductases (SRD5A1 and SRD5A3) and cytochrome P450 enzymes (CYP4A2, CYP4A11, CYP11A1, and CYP17A1), we were unable to detect a difference in the relative abundance of any transcript. Overall, it appears that the form of Se is altering circulating concentrations of cholesterol and further affecting whole animal physiology and fertility; however, the mechanism involved remains to be fully elucidated and warrants further investigation.

Mechanistic insights into inositol-mediated rumen function promotion and metabolic alteration using in vitro and in vivo models.

Inositol is a bioactive factor that is widely found in nature; however, there are few studies on its use in ruminant nutrition. This study investigated the effects of different inositol doses and fermentation times on rumen fermentation and microbial diversity, as well as the levels of rumen and blood metabolites in sheep. Rumen fermentation parameters, microbial diversity, and metabolites after different inositol doses were determined in vitro. According to the in vitro results, six small-tailed Han sheep fitted with permanent rumen fistulas were used in a 3 × 3 Latin square feeding experiment where inositol was injected into the rumen twice a day and rumen fluid and blood samples were collected. The in vitro results showed that inositol could increase in vitro dry matter digestibility, in vitro crude protein digestibility, NH3-N, acetic acid, propionic acid, and rumen microbial diversity and affect rumen metabolic pathways (p < 0.05). The feeding experiment results showed that inositol increased the blood concentration of high-density lipoprotein and IgG, IgM, and IL-4 levels. The rumen microbial composition was significantly affected (p < 0.05). Differential metabolites in the rumen were mainly involved in ABC transporters, biotin metabolism, and phenylalanine metabolism, whereas those in the blood were mainly involved in arginine biosynthesis and glutathione and tyrosine metabolism. In conclusion, inositol improves rumen function, affects rumen microorganisms and rumen and blood metabolites and may reduce inflammation, improving animal health.

Efficacy of nutritional selenium nanoparticles on growth performance, immune response, antioxidant capacity, expression of growth and immune-related genes, and post-stress recovery in juvenile Sobaity seabream (Sparidentex hasta)

This study evaluated the impacts of nano-Se on the growth, immunity, antioxidant capacity, physiological parameters, gene expression, and stress resistance of fingerling Sobaity seabream (Sparidentex hasta). The fish with an average weight of 21.5 ± 0.1 g were divided into four treatment groups in triplicates that received one of the test diets supplemented with varying levels of nano-Se: 0 (control), 0.5 (Se-0.5), 1 (Se-1), and 2 (Se-2) mg/Kg for 60 days. The results showed that final weight, weight gain rate, specific growth rate, feed intake, and feed conversion ratio improved with significant linear and quadratic trends (P < 0.05) in response to nano-Se-supplemented diets, and the best values were measured in the Se-2 group. Superoxide dismutase activity level remained unaffected among the four groups (P > 0.05). Catalase activity increased in nano-Se-supplemented groups, with the highest level measured in fish fed the Se-0.5 diet. Glutathione peroxidase activity levels were not significantly different between the control and nano-Se groups, but the lowest malondialdehyde concentration was detected in the Se-2 group. Nano-Se had no marked effect on total plasma Ig levels; however, the highest lysozyme activity and alternative complement activity (ACH50) were observed in the Se-0.5 and Se-2 groups, respectively. No significant differences (P > 0.05) were observed in plasma total protein, albumin, globulin, triglyceride, and thyroid hormone (T3 and T4) contents among the groups. However, the lowest cholesterol and low-density lipoprotein values and the highest high-density lipoprotein concentration were measured in the Se-2 group. The Se-0.5 and Se-1 groups exhibited significantly lower levels of aspartate aminotransferase activity, and the lowest alkaline phosphatase activity level was detected in the Se-1 group. The expression level of insulin-like growth factor I gene in all nano-Se-fed groups was significantly higher than the control. Also, the expression of interleukin-1β and lysozyme genes was significantly upregulated in nano-Se-supplemented groups, with the highest values in the Se-2 group. Following acute crowding stress, plasma cortisol and lactate levels at all post-stress time intervals were not significantly different among the experimental groups. Fish fed the Se-0.5 and Se-2 diets tended to have lower plasma glucose concentrations than other groups. In conclusion, dietary nano-Se at 2 mg/kg is recommended to promote growth performance and enhance antioxidant and immune parameters in Sobaity juveniles.

Toxic effects of clindamycin-hydrochloride in healthy rodents

Background: Systemic administration of clindamycin-hydrochloride (an antibiotic) is mainly associated with gastro-intestinal disturbances and allergic reactions. Little is known of its haematological and biochemical toxicity.&#x0D; Objective: To evaluate the haematological and biochemical changes associated with indiscriminate administration of oral clindamycin-hydrochloride in clinically healthy rodents.&#x0D; Materials and Methods: Twenty Wistar rats (130-189 grams) divided into four groups (A-D) of five rats each were used. Rats in group A (control) were treated with distilled water. Groups B-D received 0.2mL (below normal dose), 0.4mL (normal dose) and 1.0mL (above normal dose) of clindamycin-hydrochloride (75mg/5mL) at 8 hourly intervals, three times daily for 14 days, respectively. Thereafter, blood was collected through both ocular and cardiac puncture into ethylene diamine tetra acetic acid (EDTA) and lithium heparin bottles for evaluation of haematological and biochemical parameters, respectively.&#x0D; Results: Significant (P &lt; 0.05) increases in total white blood cell (WBC) counts and decreases in eosinophil (Eos) counts occurred in clindamycin-treated rats. In addition, significant (P &lt; 0.05) increases in concentrations of Total cholesterol, Triglyceride and High-density lipoprotein, respectively, as well as decreases in concentrations of Albumin, Alanine transaminase and Gamma-glutamyl transpeptidase, respectively also occurred in clindamycin-treated rats.&#x0D; Conclusion: Indiscriminate use of clindamycin-hydrochloride produces adverse haematological and biochemical changes in Wistar rats which may be a reflection of systemic toxicity, allergic reaction as well as liver and kidney dysfunction.

The association between dyslipidaemia in the first trimester and adverse pregnancy outcomes in pregnant women with subclinical hypothyroidism: a cohort study

BackgroundSubclinical hypothyroidism (SCH) is linked to dyslipidaemia and adverse pregnancy outcomes. However, the impact of dyslipidaemia on the outcome of pregnancy in SCH is unclear.MethodsWe enrolled 36,256 pregnant women and evaluated their pregnancy outcomes. The following data was gathered during the first trimester (≤ 13+ 6 weeks of gestation): total cholesterol (TC), low-density lipoprotein (LDL-C), triglyceride (TG), high-density lipoprotein (HDL-C), free thyroxine (FT4) and thyroid-stimulating hormone (TSH) concentrations. The reference ranges for lipids were estimated to range from the 5th to the 95th percentile. Logistic regression assessed the relationships between dyslipidaemia and adverse pregnancy outcomes, including abortion, preeclampsia/eclampsia, low birth weight, foetal growth restriction, premature rupture of foetal membranes, gestational hypertension, preterm birth, macrosomia and gestational diabetes mellitus (GDM). Additionally, the best thresholds for predicting adverse pregnancy outcomes based on TSH, FT4, and lipid levels were determined using receiver operating characteristic curves.ResultsIn the first trimester, LDL-C > 3.24 mmol/L, TG > 1.92 mmol/L, HDL-C < 1.06 mmol/L, and TC > 5.39 mmol/L were used to define dyslipidaemia. In this cohort, 952 (3.56%) patients were diagnosed with SCH, and those who had dyslipidaemia in the first trimester had higher incidences of gestational hypertension (6.59% vs. 3.25%), preeclampsia/eclampsia (7.14% vs. 3.12%), GDM (22.53% vs. 13.77%), and low birth weight (4.95% vs. 2.08%) than did those without dyslipidaemia. However, after adjusting for prepregnancy body mass index (pre-BMI), dyslipidaemia was no longer related to these risks. Furthermore, elevated TG dyslipidaemia in SCH patients was connected to an enhanced potential of gestational hypertension (odds ratio [OR]: 2.687, 95% confidence interval [CI]: 1.074 ~ 6.722), and elevated LDL-C dyslipidaemia correlated with increased preeclampsia/eclampsia risk (OR: 3.172, 95% CI: 1.204 ~ 8.355) after accounting for age, smoking status, alcohol use, pre-BMI, and levothyroxine use. Additionally, the combination of TC, TG, LDL-C, pre-BMI, and TSH exhibited enhanced predictive capabilities for gestational hypertension, preeclampsia/eclampsia, and GDM. Values of 0.767, 0.704, and 0.706 were obtained from the area under the curve.ConclusionsAmong pregnant women with SCH, dyslipidaemia in early pregnancy was related to elevated risks of adverse pregnancy consequences. The combined consideration of age, pre-BMI, TSH, and lipid levels in the first trimester could be beneficial for monitoring patients and implementing interventions to reduce adverse pregnancy outcomes.

Дія мелатоніну та кверцетину на запалення i метаболізм за умов цілодобового освітлення та висококалорійної вуглеводно-ліпідної дієти

The study is aimed at investigating the impact of exogenous melatonin and quercetin on indices of systemic inflammatory response and indicators of carbohydrate and lipid metabolism in the blood serum of male rats exposed to round-the-clock lighting (RCL) with 1500 lx intensity during the last 30 days of being kept on a 60 day high-calorie carbohydrate-lipid diet (HCCLD, 20% fructose solution and the proper chow). The study has demonstrated that the restoration of serum melatonin concentration in rats by its exogenous administration during the RCL exposure and keeping them on HCCLD did not fully correct the indicators of the systemic inflammatory response such as the content of tumor necrosis factor α (TNF-α) and C-reactive protein (CRP), as well as indices of carbohydrate and lipid metabolism such as concentration of insulin, highdensity lipoprotein (HDL), very low-density lipoprotein (VLDL) and triglycerides, HOMA-IR insulin resistance index. The administration of quercetin under the experimental conditions was accompanied by a significant increase in the serum melatonin concentration (by 85.9%), a decrease in the content of TNF-α (by 53.9%), CRP (by 54.4%), glucose (by 49.2%), insulin (by 49.6%), VLDL (by 49, 2%) and triglycerides (by 49.3%), and an increase in HDL concentration (by twofold), but these indicators (with the exception of the HOMA-IR index, which decreased by 62.4%) did not reach the values of the intact group. The combined effect of melatonin and quercetin under RCL exposure and HLLD significantly improved the indicators of systemic inflammatory response, carbohydrate and lipid metabolism that is confirmed by a more significant decrease in serum levels of TNF-α, CRP, insulin, VLDL and triglycerides, an increase in HDL concentration, and a decrease in the HOMA-IR index compared with the separate use of melatonin and quercetin.

Fatty acid profiles and cholesterol of muscovy duck meats supplemented with cellulase, carnitine and fish oil

This present study was carried out to investigate the inclusion effect of carnitine, cellulase, and fish oil on fatty acids composition and cholesterol level of Muscovy duck eggs. A total of 120 Muscovy ducks in laying period were utilized and assigned into 4 dietary treatments, 5 replicates consisting of 6 ducks each, receiving treatments for 90 days. Experimental groups composed of T0 = basal ration, T1 = T0 supplemented with 0,1% cellulase, T2 = T1 supplemented with L-carnitine 40 ppm, and T3 = T2 supplemented with 4% tuna fish oil. This study revealed that the effects of fish oil and L-carnitine supplementation in rations containing cellulase enzyme significantly lower cholesterol level (P<0.01) of Muscovy duck eggs from 867.42 mg/dl to 712.33 mg/dl, Low Density Lipoprotein (LDL) from 28.33 to 22.12 mg/dl, saturated fatty acids from 30.88% to 25.02%. Meanwhile it increased the total concentration of High Density Lipoprotein (HDL) from 71.67 to 77.88 mg/dl, unsaturated fatty acid from 69.12% to 74.98%, linolenic acids from 5.71% to 8.40%, and linoleic acids from 28.74% to 37.30%. A diet rich in cellulase enzyme, carnitine, and fish oil notably increased HDL level, along with the reduction of LDL and total cholesterol.

Exacerbation of atherosclerosis, hyperlipidemia and inflammation by MK886, an inhibitor of leukotriene biosynthesis, in obese and diabetic mice

Leukotrienes are potent mediators of the inflammatory response and 5-lipoxygenase, the enzyme responsible for their synthesis, is dependent on its interaction with 5-lipoxygenase activating protein for optimum catalysis. Previous studies had demonstrated that macrophage infiltration into adipose tissue is associated with obesity and atherosclerosis in LDLR−/− mice fed a high fat-high carbohydrate. The present study was undertaken to determine whether inhibition of 5-lipoxygenase activating protein is efficacious in attenuating adipose tissue inflammation in LDLR−/− mice fed a high fat-high carbohydrate. 10-week old male LDLR−/− mice were fed a high fat-high carbohydrate diet for 22-weeks, with or without MK886 (40 mg/kg/day, ad libitum) a well-established 5-lipoxygenase activating protein inhibitor. All mice had an approximate 2-fold increase in total body weight, but a 6-week course of MK886 treatment had differential effects on adipose tissue size, without affecting macrophage accumulation. MK886 exacerbated the dyslipidemia, increased serum amyloid A content of high-density lipoproteins and caused a profound hepatomegaly. Dyslipidemia and increased serum amyloid A were concomitant with increases in atherosclerosis. In conclusion, MK886 paradoxically exacerbated hyperlipidemia and the pro-inflammatory phenotype in a mouse model of diet-induced atherosclerosis, possibly via a disruption of hepatic lipid metabolism and increased inflammation.

Short-Term Cocoa Supplementation Influences Microbiota Composition and Serum Markers of Lipid Metabolism in Elite Male Soccer Players.

Dietary strategies to improve arachidonic acid:eicosapentaenoic acid (AA:EPA) ratios are of interest due to potential reductions in inflammation and oxidative stress following exercise. The aim of this study was to investigate the impact of a novel dietary intervention, that is, the ingestion of 30g of dark chocolate, on blood lipid profiles and gut microbiota composition in elite male soccer players. Professional male soccer players were randomly assigned to the experimental group (DC) provided with 30g of dark chocolate or to the control group (WC), provided with 30g of white chocolate, for 30days. Before and after intervention, blood, fecal sample, and anthropometry data were collected. For each outcome, two-way repeated-measure analysis of variance was used to identify differences between baseline and endpoint (Week 4), considering treatment (dark chocolate, white chocolate) as intersubjects' factors. Metagenomic analysis was performed following the general guidelines, which relies on the bioBakery computational environment. DC group showed increased plasma polyphenols (from 154.7 ± 18.6μg gallic acid equivalents/ml to 185.11 ± 57.6μg gallic acid equivalents/ml, Δ pre vs. post = +30.41 ± 21.50) and significant improvements in lipid profiles: total cholesterol (Δ -32.47 ± 17.18mg/dl DC vs. Δ -2.84 ± 6.25mg/dl WC, Time × Treatment interaction p < .001), triglycerides (Δ -6.32 ± 4.96mg/dl DC vs. Δ -0.42 ± 6.47mg/dl WC, Time × Treatment interaction p < .001), low-density lipoprotein (Δ -18.42 ± 17.13mg/dl vs. Δ -2.05 ± 5.19mg/dl WC, Time × Treatment interaction p < .001), AA/EPA ratio (Δ -5.26 ± 2.35; -54.1% DC vs. Δ -0.47 ± 0.73, -6.41% WC, Time × Treatment interaction p < .001) compared with WC group. In addition, 4weeks of intervention showed a significant increase in high-density lipoprotein concentration in DC group (Δ + 3.26 ± 4.49mg/dl DC vs. Δ -0.79 ± 5.12mg/dl WC). Microbial communities in the DC group maintained a slightly higher microbial stability over time (exhibiting lower within-subject community dissimilarity). Ingesting 30g of dark chocolate over 4weeks positively improved AA:EPA ratio and maintained gut microbial stability. Dark chocolate ingestion represents an effective nutritional strategy to improve blood lipid profiles in professional soccer players. What Are the Findings? Ingesting 30g of dark chocolate for 4weeks positively influences blood lipid AA: EPA ratio while maintaining gut microbial stability. What This Study Adds? Dietary intake of specific foods such as dark chocolate represents an alternative strategy to support the health and recovery of elite soccer players. What Impact Might This Have on Clinical Practice in the Future? From a clinical and translational perspective, dark chocolate ingestion positively modulates favorable blood lipid profiles and polyunsaturated fatty acid metabolism while maintaining gut microbial stability. Dark chocolate ingestion may be considered as an effective nutritional strategy in elite sport environments during periods of high-intensity training and congested competitions. Further research is required to determine functional outcomes associated with the observed improvements in blood lipid profiles.

Study of the effect of alimentary biocorrectors on the physiological and biochemical parameters of laboratory rats of the Wistar line

Physiological and biochemical parameters of blood plasma of laboratory animals were evaluated when using, in addition to the main diet, a food substance with known biocorrecting properties - a probiotic emulsion administered orally, based on wheat germ oil and biomass of a consortium of lacto and bifidobacteria, including Str. thermophiles, B. bifidum, B. longum, B. adolescentis, L. acidophilus, L. plantarum, L. fermentum. The object of experimental studies was male and female growing white rats of the Wistar line in the amount of 60 individuals, comprising 2 experimental and 2 control groups of 15 individuals each. Evaluation of the average values of physiological indicators showed an increase in the horizontal and vertical motor activity of the white rats of the experimental group by an average of 16-18 % and 60-70%, an increase in the number of examined minks by 10-12 %, a significant decrease in the level of grooming and defecation. It was established that the clinical and biochemical parameters of the blood plasma of white rats were within the physiological limits. The concentrations of total protein, glucose, high and low density lipoproteins, alanine aminotransferase, aspartate aminotransferase by group differed slightly. It was found that the concentration of total cholesterol and LDL in the test groups of females and males at the end of the experimental studies decreased by 2.1-2.2 % and 4.1-5.8 %. The bilirubinaikreatinin concentration was slightly reduced in the experimental group of females and males by 1.1-1.3 % and 2.1-4.2 %, respectively. A significant increase in hemoglobin and red blood cells by 2.6-7.1 % and 4.8-5.1 % was recorded.

Association Between Glycated Hemoglobin and the Lipid Profile at the Central Yunnan Plateau: A Retrospective Study.

Dyslipidemia commonly complicates type 2 diabetes mellitus, yet the relationship between glycosylated hemoglobin and blood lipid levels remains uncertain. This retrospective cross-sectional study included 27,158 participants from the People's Hospital of Yuxi. Statistical comparisons for continuous variables utilized analysis of variance (ANOVA), while chi-square analysis was employed for categorical variables. Boxplots assessed the concentration, dispersion, and deviation of total cholesterol (TC), triglycerides (TG), low-density lipoprotein (LDL-C), and high-density lipoprotein (HDL-C) distribution. A linear regression analysis examined the association between HbA1c and lipid profile, complemented by a fitting curve to visualize trends. Participants who developed diabetes exhibited higher age and elevated Body mass index (BMI), systolic blood pressure (SBP), diastolic blood pressure (DBP), TC, TG, LDL-C, and FPG levels compared to those without diabetes (p < 0.001). Linear regression analysis demonstrated significant associations between HbA1c values and TC, TG, LDL-C, and HDL-C (p < 0.001). The plotted curve indicated that as TC, TG, and LDL levels increased, HbA1c levels rose, while HDL levels decreased. HbA1c was positively correlated with TC, TG, LDL-C, and negatively correlated with HDL-C in the population in the central Yunnan Plateau.

Effect of L-arginine on myocardial vascular atherosclerosis in rabbits under high mountain environment

The study assessed blood lipid metabolism indicators and myocardial vascular morphology in rabbits with atherosclerosis under long-term adaptation under high mountain environment against the background of L-arginine therapy and prophylaxis. The experiment was conducted on 30 rabbits divided into 5 groups. Using biochemical analyzers, changes in the concentrations of total cholesterol, triglycerides, low- and high-density lipoproteins were determined before and after atherosclerosis simulation; additionally, the effect of L-arginine on the dynamics of the lipid spectrum indicators under long-term adaptation to high mountain environment was assessed. The results were processed using SPSS 16.0 at a statistical significance level of p &lt;0.05. Administration of L-arginine in rabbits with high cholesterol rate under long-term adaptation under high mountain environment resulted in a significant decrease in its content related to the initial increased level. Triglyceride level decreased after L-arginine therapy under adaptation to high mountain environment; however, an increase in the level of this lipid type was observed in animals receiving cholesterol simultaneously with L-arginine (prophylaxis). The therapy and prophylaxis with L-arginine resulted in a decrease in LDL level in animals with atherosclerosis under long-term adaptation to high mountain environment that may indicate the potential efficacy of the drug in the treatment of this condition.

Ghrelin Alleviates Inflammation, Insulin Resistance, and Reproductive Abnormalities in Mice with Polycystic Ovary Syndrome via the TLR4-NF-κB Signaling Pathway.

Polycystic ovary syndrome (PCOS) commonly impacts fertile females with potentially severe effects on fertility and metabolism. Blood ghrelin levels are lower in PCOS patients, and exogenous supplements have been proposed for their potential to trigger anti-inflammatory effects at the cellular level. This study aimed to investigate whether pretreatment with ghrelin reduced inflammation, insulin resistance, and reproductive abnormalities in PCOS and the underlying mechanism of this disorder. Ghrelin supplementation was first tested in an inflammation model using human ovarian granulosa cells (KGN cells) that were built by treated with Lipolyaccharide. KGN cells were pretreated with ghrelin and exposed to lipopolysaccharide (LPS). Inflammatory gene expression and cytokine production were analyzed by Enzyme-linked immunosorbent assay (ELISA). Based on these results, the PCOS mice model was built with Dehydroepiandrosterone (DHEA) and a high-fat diet. The mRNA and protein expressions of inflammatory factors including Toll-like receptor 4 (TLR4), nuclear factor kappa-B-p65 (NF-κB-p65), Phospho-NF-κB-p65 (p-NF-κB-p65) and myeloid differentiation factor 88 (MYD88) related to the TLR4/NF-κB signaling pathway were evaluated in KGN cells and mouse ovarian tissues using Real-Time Quantitative Polymerase Chain Reaction (RT-qPCR) and western blot, respectively. Lipid metabolism was quantified via an automated biochemical analyzer. The mRNA and protein expressions of interleukin-6 (IL-6), interleukin-1 beta (IL-1β), and tumor necrosis factor alpha (TNF-α) in ghrelin pretreated KGN cells were lower than the LPS group (p < 0.05). Protein expression was reduced for TLR4, NF-κB-p65, and MYD88 within KGN cells of ghrelin groups compared to the LPS group (p < 0.05). Ghrelin treatment restored the estrous cycle and slowed weight gain and abdominal fat weight of PCOS mice (p < 0.05). Ghrelin treatment decreased the serum concentrations of testosterone, luteinizing hormone, insulin, IL-6, IL-1β, and TNF-α compared to the PCOS group (p < 0.05). Estradiol concentrations of mice treated with ghrelin were higher than the PCOS group (p < 0.05). The concentrations of low and high-density lipoprotein, triglyceride, and cholesterol in mice treated with ghrelin were lower than in the PCOS mice (p < 0.05). Inflammatory gene expression for IL-6, IL-1β, TNF-α, TLR4, NF-κB-p65, and MYD88 decreased in the ovarian tissues of ghrelin-treated mice compared to the PCOS group (p < 0.05), along with reduced protein expression of TLR4, p-NF-κB-p65, and MYD88 (p < 0.05). In the present study, ghrelin treatment effectively reduced inflammation in vitro, and attenuated insulin resistance and reproductive abnormalities in PCOS mice through the TLR4/NF-κB signaling pathway, highlighting potential therapeutic avenues for future PCOS treatments and research directions.

Use of tannase-producing bacteria isolated from the rumen to improve the nutritional value of pomegranate peel for fattening lambs.

The use of plants and by-products, which are containing a high amount of secondary and anti-nutritional compounds such as tannins, in animal feed is limited. The methods that can reduce these compounds make facilitate their use in animal feed. The aim of this study was to reduce the adverse effects of pomegranate peel (PP) tannin for fattening lambs using the tannase-producing bacteria. Twenty-one Arabi male lambs (averagely 35±3.8kg weight and 8±1.0 months age) were used in a completely randomized design with three treatments and seven replications in the present experiment. The experimental treatments included 1 - control diet (CNT, no PP), 2 - diet containing untreated PP (raw PP, UTPP) and 3 - diet containing PP treated with tannase-producing bacteria (bacteria treating PP, BTPP). Using UTPP decreased nutrient intake compared to the control and treatment with tannase-producing bacteria again significantly increased nutrient intake compared to the UTPP (p<0.05). The digestibilities of organic matter, neutral detergent fibre and acid detergent fibre in the control treatment were significantly higher than UTPP and BTPP and in the BTPP were significantly higher than the UTPP (p<0.05). The use of UTPP in the diet significantly decreased the pH, ammonia nitrogen concentration and the total protozoa population of the rumen compared to the control (p<0.05), and treatment with bacteria increased them again. The lowest total protozoa population was observed in UTPP treatments (p<0.05). The highest concentration of blood glucose was observed in UTPP; however, the highest concentrations of blood urea nitrogen, cholesterol, triglyceride, high-density lipoprotein (non-significant) and low-density lipoprotein were in the control treatment. The effect of experimental treatments on the dry matter consumption of the whole period was significant; however, there was no significant effect on average daily gain, feed conversion ratio, feed efficiency and longissimus muscle colorimetric systems. Therefore, considering the positive effects of treatment PP with tannin-degrading bacteria relative to raw PP, using these bacteria is a proper way to reduce tannin, thus improving the nutritional value of PP for ruminants.

LOW HIGH-DENSITY LIPOPROTEIN LEVEL ASSOCIATED WITH ENHANCED INFLAMMATORY RESPONSE AND ONE-YEAR PERSISTENCE OF LONG COVID IN PATIENTS UNDERGOING HEMODIALYSIS: A CROSS-SECTIONAL COHORT STUDY

Background: Long-term consequences of COVID-19, known as long COVID, present distinctive hurdles for patients receiving hemodialysis treatment. Reduced levels of high-density lipoprotein (HDL) (&lt; 1.22 mmol/L) have previously been demonstrated to be associated with heightened susceptibility to COVID-19 and immediate COVID-19-related adverse outcomes in this patient population. However, the potential association between HDL levels and the persistence of long COVID has not been examined within the hemodialysis cohort. The present study aimed to explore the relationship between HDL levels and inflammatory responses one year after COVID-19 among patients undergoing hemodialysis. Methods: A total of 80 patients treated with hemodialysis, aged 55 (44-62.5) years, with a dialysis vintage of 45 (21-78.6) months and a history of COVID-19, were enrolled in this cross-sectional cohort study. Among them, 45 (56.2%) were diagnosed with long COVID, while 35 (43.8%) had fully recovered. Lipid profiles and inflammatory markers, such as serum C-reactive protein, and interleukins -6 and -17, were assessed one year post-infection. Results: Patients experiencing long COVID exhibited significantly lower HDL levels compared to fully recovered individuals: 1.19 (1.06-1.76) vs 1.66 (1.32-1.92) mmol/L (p &lt; 0.0001). The HDL cut-off point of less than 1.22 mmol/L demonstrated a sensitivity of 84.9% and specificity of 95.3% to predict one-year long COVID persistence in our cohort. Among the patients with HDL levels &lt; 1.22 mmol/L, elevated concentrations of C-reactive protein (р = 0.003), interleukin-6 (p = 0.005), and interleukin-17 (p &lt; 0.0001) were evident compared to those with HDL concentrations exceeding 1.22 mmol/L. Subsequent subgroup analysis revealed a more pronounced inflammatory profile in patients concurrently experiencing long COVID and exhibiting low HDL levels. Conclusion: The obtained results suggest that a low level of HDL (&lt; 1.22 mmol/L) may exacerbate the inflammatory response in patients undergoing hemodialysis, potentially contributing to the persistence of long COVID even a year after infection. Future research is necessary to elucidate the pathogenetic mechanisms of this relationship and explore potential strategies to improve patient outcomes.

Effects of quercetin and daidzein on egg quality, lipid metabolism, and cecal short-chain fatty acids in layers.

In this study, the effects of quercetin and daidzein on egg quality, lipid metabolism, and cecal short-chain fatty acids (SCFAs) were compared in layers. Hyline brown layers at 385 days of age with a similar laying rate (81.36% ± 0.62%) and body weight (2.10 kg ± 0.04 kg) were randomly divided into three treatments, six replicates per treatment, and 20 layers per replicate. Layers in control, quercetin, and daidzein treatment were fed by a basal diet supplemented with 0 mg/kg, 500 mg/kg quercetin, and 30 mg/kg of daidzein for 10 weeks. Results showed that eggshell strength and albumen height in week 4, egg yolk diameter in week 10, and eggshell thickness and egg yolk height in weeks 4 and 10 were significantly increased in the quercetin treatment (P ≤ 0.05); contents of phospholipid (PL) and lecithin (LEC) in egg yolk and high-density lipoprotein (HDL) content in serum were significantly increased; however, contents of malondialdehyde (MDA), total cholesterol (TC), and triglyceride (TG) in egg yolk, contents of TC, TG, low-density lipoprotein (LDL), and very-low-density lipoprotein (VLDL) in serum, and contents of TC and TG in the liver were significantly decreased in the quercetin treatment (P ≤ 0.05); contents of isobutyric acid and valeric acid were significantly increased in the cecum of the quercetin treatment (P ≤ 0.05), compared with control. Moreover, egg yolk height in week 10 and eggshell thickness in weeks 4 and 10 were significantly increased in the daidzein treatment (P ≤ 0.05); contents of MDA, TC, and TG in egg yolk, TC, TG, and VLDL in serum, and TC and TG in liver were significantly decreased in the daidzein treatment (P ≤ 0.05); and HDL content was significantly increased in serum of the daidzein treatment (P ≤ 0.05) compared with control. However, daidzein did not affect SCFA content in the cecum. In conclusion, egg quality was improved by quercetin and daidzein by increasing the antioxidant ability of egg yolk and by regulating lipid metabolism in layers. Quercetin worked better than daidzein in improving egg quality under this experimental condition.

Impacts of willow (Salix babylonica L.) leaf extract on growth, cecal microbial population, and blood biochemical parameters of broilers

The investigation examined the use of willow leaf extract (WLE) on broiler chickens, examining carcass characteristics, cecal microbiota, antioxidants, and blood parameters. In 4 groups of 300 chicks, a basal diet was given for 5 wk, and the first treatment was basal diet (C). The diets for the remaining 3 treatments (WLE150, WLE300, and WLE450) contained 150, 300, and 450 mg of willow leaf extract /kg, respectively. The study found that birds fed willow leaf extract supplements had significantly greater body weight (BW), body weight gain (BWG), and enhanced feed conversion ratio (FCR) vs. the control group. Birds fed at 450 mg/kg food showed the greatest growth features, carcass weight, liver weight, lower abdominal fat, better low-density lipoprotein (LDL), and high-density lipoprotein (HDL) concentrations, and highest hematological characteristics. Chickens fed diets supplemented with varied doses of willow leaf extract showed significantly increased antioxidant enzyme activity, with higher amounts of glutathione peroxidase (GPx) activity, superoxide dismutase (SOD), total antioxidant capacity (TAC), and lower malondialdehyde (MDA). However, in the study, birds fed a diet supplemented with 450 mg of willow leaf extract per kg meal showed a significant drop of 13.02%, which found no significant variations in hazardous bacteria (Escherichia coli) across 2 treatments (WLE150 and WLE300). In addition, the study discovered that birds fed with varied doses of willow leaf extract had fewer cecum infections (Staphylococci aureus). We conclude that using willow at a level of 450 mg/kg diet can significantly enhance the BWG, FCR, antioxidant levels and beneficial bacteria activity besides the condition of broiler chicken's general health.