Blood Biochemical Parameters Research Articles

Diluted seawater decreased weight gain and altered blood biochemical parameters in Bach Thao goats

ABSTRACT This study aimed to evaluate the effect of saline water (SW) on physiological responses, blood biochemical parameters and body weight changes in Bach Thao goats. The study was designed completely randomized with four treatments (n = 5 each), including a control as goats’ drinking fresh water (FW), goats’ drinking 0.5% SW (LSW, low SW), goats’ drinking 1.0% SW (MSW, moderate SW) and goats’ drinking 1.5% SW (HSW, high SW). The results showed that dry matter intake (DMI) decreased as SW increased (P < 0.05). Animals in the MSW group consumes highest water intake (WI), whereas animals from HSW consumed least water from 4th to 8th weeks of experiment. Respiration rate and rectal temperature in HSW were greater than those in the FW group (P < 0.05). The body weight was similar among treatments, but animals in HSW were with lower weight gain than those in the control (P < 0.05). Goats in HSW altered blood biochemical parameters in the 8th week, not for the 4th week. We concluded that Bach Thao goats drank high SW within 56 days and had negative effects on production and may effect on functions of the liver and kidney. Besides, goats from the HSW group have decreased daily WI to minimize the salt stress.

ИЗМЕНЕНИЯ БИОХИМИЧЕСКИХ ПОКАЗАТЕЛЕЙ КРОВИ У КРЫС ЛИНИИ WISTAR ПОСЛЕ ИМПЛАНТАЦИИ ФРАГМЕНТОВ СОСУДИСТЫХ ПРОТЕЗОВ

Background. This article deals with the use of biological vascular grafts made from bovine xenopericardium as a plastic material for reconstructive operations on the great vessels, which is one of the most important topics in modern vascular surgery. Aim. To compare changes in blood biochemical parameters in Wistar rats after implantation of fragments of biological and synthetic vascular grafts. Material and methods. The experimental study was performed on male laboratory Wistar rats (n = 50). The animals were divided into two groups: group 1 included 25 animals with implantation of a Dacron vascular graft; group 2 was composed of 25 animals with implantation of a vascular graft made from bovine xenopericardium. Blood samples from the laboratory rats were collected on days 3, 7, 14, 21 and 30 after the operation. Plasma urea, creatinine, alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and lactate dehydrogenase levels were measured. Results. No clinically significant changes in concentrations of low molecular weight metabolites of nitrogen metabolism or liver enzymes activity, alkaline phosphatase and lactate dehydrogenase activity were observed after implantation of a biological vascular graft from bovine xenopericardium compared to the animals with implanted synthetic vascular graft. Conclusion. The use of a biological vascular graft made from bovine xenopericardium does not cause clinically significant changes in blood biochemical parameters in laboratory rats.

Effects of daily probiotic supplementation with Lactobacillus acidophilus on calcium status, bone metabolism biomarkers, and bone mineral density in postmenopausal women: a controlled and randomized clinical study.

Menopause poses significant health risks for women, particularly an increased vulnerability to fractures associated with osteoporosis. Dietary interventions have emerged as promising strategies, focusing on mitigating the risk of osteoporosis rather than solely addressing the established disease. This 12-week randomized controlled trial aimed to analyze the effects of consuming Lactobacillus acidophilus probiotics on calcium levels, biomarkers of bone metabolism, and bone mineral density (BMD) profiles in postmenopausal women. Fifty-five participants were randomly assigned to receive either a placebo (n = 25) or the probiotic L. acidophilus UALa-01™ (n = 30) daily via oral intervention. Throughout the study, evaluations included body composition, blood biochemical parameters, serum calcium levels, and biomarkers of bone metabolism. Additionally, Dual-energy X-ray absorptiometry was used to measure BMD profiles. The findings delineated that the probiotic group experienced a decrease in serum calcium levels compared to their initial levels. However, hair calcium levels and biomarkers related to bone metabolism showed no notable changes within this group. Consumption of probiotic L. acidophilus also seemed to prevent fluctuations in bone turnover markers. Moreover, there were no significant alterations in BMD levels at the lumbar spine, left femur, and total body in the probiotic group. Additionally, probiotic intake led to favorable outcomes by significantly reducing both body fat and visceral fat during the intervention period. Conversely, an adverse effect of consuming probiotic L. acidophilus was observed with a significant increase in glucose concentration. In conclusion, the consumption of L. acidophilus probiotics daily for 12 weeks among postmenopausal women does not affect the profile of BMD, but it may help in stabilizing bone turnover. It is important to note that most measured parameters were within the normal range for this population. However, it is worth noting that 3 months of probiotic supplementation could potentially disrupt calcium and glucose status in postmenopausal women.

147. Efficacy evaluation of novel organic iron complexe in laying hens: Effects on laying performance and blood biochemical parameters

147. Efficacy evaluation of novel organic iron complexe in laying hens: Effects on laying performance and blood biochemical parameters

Biochemical blood profile of red deer (Cervus elaphus), reared in the conditions of Polissya Volyn

It was found that the biochemical parameters of blood of red deer (Cervus elaphus) reared in the conditions of Polissya Volyn, in general, correspond to the main patterns characteristic of this population, although they have some fluctuations. Thus, we have shown that the content of total protein, its fractional composition, concentration of glucose, urea and creatinine in the blood serum of English deer blood line and Latvian crossbreed deer were within the reference values characteristic of this species of wildlife. It was found that the activity of ALT and GGT was higher in animals of English origin, and AST and ALP — in Latvian crossbred deer. The content of Ca, P, Mg and Na ions in the blood was also higher, respectively, by 9.4, 28, 22.7 and 4%. It was found that against the background of stress caused by physical method of capturing animals for blood sampling, the level of total protein and its albumin fraction. The concentration of urea was by 22.5%, glucose — by 18.4% and creatinine by 6.5% higher than in the group of animals with sedation. Under technological stress in deer, the activity of ALT and AST in the blood increases (by 11 and 5.5%) and ALP and GGT (by 9.1 and 20.0%), respectively. The study of blood biochemical parameters in young animals (3–4 months old) revealed that the content of total protein in females is 6.4% higher than in males. At the same time, the activity of AST activity in the blood serum of males was 17.4% higher than in young females. The concentration of Ca ions in males was 32.4% higher than in females, and concentration of P, on the contrary, was lower in males. The ratio of Ca to P in the blood of males was 1.57, and in females — 1.30. It was found that the content of total protein in animals increased with age and was the highest in adult red deer. While the concentration of the studied macronutrients (Ca, P, Na, K) had a higher level in the blood of young animals. While the concentration of the studied macronutrients (Ca, P, Na, K) had a higher level in the blood of young animals.

Investigation of the Physiological and Histopathological Effects of Omega Acids (3, 6, 9) and Stearic Acid on Rats in Ischemia Reperfusion

Ischemia causes reversible or irreversible cell or tissue damage due to insufficient blood flow to the organ or tissue. In this study, our aim is to investigate the protective effect of omega 3, 6 9 and stearic acid application before ischemia reperfusion injury in the leg muscles. For this purpose, 70 female albino rats were divided into 10 groups. The study continued at the same dose for 14 days. In addition, these fatty acids were given to other groups without ischemia-reperfusion. After the application different faty acid, blood biochemical parameters of different fatty acids, oxidative stress parameters and histopathology of tissues (liver, kidney, muscle) were examined in rats. As a result, it was observed that omega 9 fatty acid has better protective properties compared to other omega fatty acids and stearic acid in terms of histopathological properties and oxidative stress index. Additionally, other fatty acids and stearic acid provided some degree of protection against the deleterious effects of ischemia-reperfusion

Selected blood biochemical parameters and energy intake in physically active women and men in the context of body shape satisfaction or dissatisfaction

Selected blood biochemical parameters and energy intake in physically active women and men in the context of body shape satisfaction or dissatisfaction

Relationships between pesticides, polychlorinated biphenyls, blood parameters and oxidative stress of white stork Ciconia ciconia chicks in Poland

The white stork Ciconia ciconia is a bird species located at the top of the trophic pyramid in grassland and wetland ecosystems. This charismatic species is susceptible to pesticides and their environmental residues. In 2016, we collected blood samples from 114 white stork chicks across Western and Southern Poland. Chicks were sexed by molecular analysis and aged by development pattern. We studied the relationship between the concentration of pesticides (beta-HCH, heptachlor, aldrin, endrin, 4.4′-DDD, 4.4′-DDE and 4.4′-DDT) and of PCB in the chicks’ blood with blood morphology and biochemistry parameters in the blood. The mean (± SD) values of concentrations of above detection level pesticides were: for (1) beta-HCH 4.139 ± 19.205; (2) 4.4′-DDE 9.254 ± 91.491 and additionally (3) PCB 16.135 ± 44.777 ppb. We found negative relationships between beta-HCH and oxidative stress enzyme activity in the blood, between beta-HCH and leukocyte concentration and between 4.4′-DDE and catalase activity. We also found a positive relationship between the concentration of pesticides in blood and the age of chicks. Interestingly, we found a higher concentration of PCB in the blood of male stork chicks than in female stork chicks. We provide more evidence that the presence of pesticides in the environment can be a strong stress factor, shaping the health status of birds.

Effect of Kankrej Cow Urine Distillate and Panchgavya Supplementation on Growth Performance, Carcass Characteristics and Blood Biochemical Profile of Broiler Chickens

A study was conducted during the month of December, 2023 and January, 2024 to evaluate the effect of cow urine distillate and Panchgavya supplementation on growth performance, nutrient digestibility, carcass characteristics and blood biochemical parameters of broiler chickens. A total of 200 day-old broiler chicks were uniformly distributed into four treatment groups with 50 birds per treatment for a period of 42 days. The dietary treatments were T1: Basal diet, T2: Basal diet+1 ml cow urine distillate (CUD) in drinking water bird-1 day-1, T3: Basal diet+1 ml Panchgavya in drinking water bird-1 day-1 and T4: Basal diet+50 mg of Commercial feed grade antibiotic (Tylosin phosphate) kg-1 of feed. Results revealed that the mean final body weight and body weight gain in broiler chickens were not influenced by the inclusion of CUD and Panchgavya. There was no effect on feed intake, nutrient digestibility, carcass characteristics and blood biochemical parameters due to CUD and Panchgavya supplementation in broiler chickens. The feed conversion ratio was better in Panchgavya and feed antibiotic groups than the control group. The serum cholesterol level was significantly (p&lt;0.05) reduced in Panchgavya and feed antibiotic groups followed by CUD group than the control. It may be concluded that supplementation cow urine distillate and Panchgavya in broiler chickens did not influence growth performance, feed intake, nutrient digestibility, carcass characteristics and blood biochemical parameters. Panchgavya and feed antibiotic supplementation improved feed conversion ratio and reduced serum cholesterol level in broiler chickens.

C60 Fullerene Reduces the Level of Liver Damage in Chronic Alcohol Intoxication of Rats.

The liver is the main organ responsible for the metabolism of ethanol, which suffers significantly as a result of tissue damage due to oxidative stress. It is known that C60 fullerenes are able to efficiently capture and inactivate reactive oxygen species in in vivo and in vitro systems. Therefore, the purpose of this study is to determine whether water-soluble C60 fullerene reduces the level of pathological process development in the liver of rats induced by chronic alcohol intoxication for 3, 6, and 9 months, depending on the daily dose (oral administration; 0.5, 1, and 2 mg/kg) of C60 fullerene throughout the experiment. In this context, the morphology of the C60 fullerene nanoparticles in aqueous solution was studied using atomic force microscopy. Such biochemical parameters of experimental animal blood as ALT (alanine aminotransferase), AST (aspartate aminotransferase), GGT (gamma-glutamyl transferase) and ALP (alkaline phosphatase) enzyme activities, CDT (carbohydrate-deficient transferrin) level, values of pro-antioxidant balance indicators (concentrations of H2O2 (hydrogen peroxide) and GSH (reduced glutathione), activities of CAT (catalase), SOD (superoxide dismutase) and GPx (selenium-dependent glutathione peroxidase)), and pathohistological and morphometric features of liver damage were analyzed. The most significant positive change in the studied biochemical parameters (up to 29 ± 2% relative to the control), as markers of liver damage, was recorded at the combined administration of alcohol (40% ethanol in drinking water) and water-soluble C60 fullerenes in the optimal dose of 1 mg/kg, which was confirmed by small histopathological changes in the liver of rats. The obtained results prove the prospective use of C60 fullerenes as powerful antioxidants for the mitigation of pathological conditions of the liver arising under prolonged alcohol intoxication.

Impact of polyvinyl chloride microplastic and paraquat herbicide on the blood cells, biochemical parameters, liver enzymes and morphological changes of aqueduct fish

In recent years, the surge in plastic production has led to pervasive pollution across all environments, earning us the title of inhabiting a “plastic world.” Consequently, this research endeavors to explore alterations in biochemical parameters, liver enzymes, and tissue integrity within the gills, intestines, and liver of black fish subjected to polyvinyl chloride (PVC) microplastics and paraquat herbicide, both individually and in combination. For this purpose, we allocated 90 blackfish specimens into 9 groups consisting of 10 individuals each through random selection. Following a period of 28 days, we carried out an assessment to investigate the toxic effects of PVC and paraquat, both separately and in combination. Subsequently, The results indicate that the number of red blood cells (RBCs, millions/mm3) in all studied groups (Group G: 3.6 ± 0.18; Group H: 3.5 ± 0.17; and Group I: 3.2 ± 0.16) is significanly lower than the control group (Pvalue<0.05). The glucose levels in all studied groups (Group B: 47 ± 5.12; Group C: 48 ± 3.79; Group D: 51 ± 4.14; Group E: 48 ± 5.37; Group F: 53 ± 7.48; Group G: 53 ± 9.24; Group H: 58 ± 10.43; and Group I: 61 ± 8.71) are higher than the control group (46 ± 3.71). The results indicate that the levels of AST enzyme in all studied groups (group B: 30 ± 0.17; group C: 32 ± 1.61; group D: 34 ± 1.92; group E: 33 ± 1.17; group F: 38 ± 2.27; group G: 38 ± 1.71; group H: 43 ± 2.15; and group I: 46 ± 2.33). Groups F, G, H, and I exhibit significantly higher levels of AST enzyme compared to the control group, with a p-value<0.05. Morphological changes observed in erythrocytes include deformation and cell vacuolation. The maximum amount of changes in the morphology of erythrocytes occurs when black fish is exposed to 2 mg/L of PVC and 0.4 mg/L of paraquat (group I). The histological harm caused by the combination of PVC and paraquat is significant. Findings indicate that increasing the concentration of both microplastics and paraquat enhances their toxicity when combined. Consequently, it's imperative to assess the toxic impact of microplastics (MPs) and paraquat individually, as well as in combination, on aquatic organisms to safeguard them from the detrimental effects of these substances.

Biochemical indicators of pig blood when using a complex probiotic feed supplement

The use of probiotics in animal feed is one of the most promising alternatives to the application of antibiotics. In order to establish the effectiveness of the use of a complex probiotic supplement (Lactobacillus spp., Lactococcus spp., Spirulinaceae, Saccharomyces cerevisiae, Actinomycetaceae, Aspergillus spp. and Penicillium spp.) in pig farming, two groups of pigs of the Poltava Meat breed were formed by the analog method. In the ration of the fattening pigs of the experimental group, 1.0% of the mass of compound feed was replaced with a complex probiotic supplement, which was fed during the 45 days of the experimental period at the age of 135 to 180 days. In experimental pigs, biochemical blood parameters were determined (the content of protein, lipids, cholesterol, triglycerides, activity of aspartate aminotransferase and alanine aminotransferase, the content of creatinine, glucose, calcium, phosphorus, albumins and globulins) using test kits from the company "Filisit Diagnostics" (UA). As a result of the research, it was established that with the use of a complex probiotic feed supplement, the content of total protein in the blood serum of the pigs of the experimental group was higher by 18.4%, glucose by 21.4%, aspartate aminotransferase activity by 20.4%, alanine aminotransferase by 38.0% compared to control group. In both groups, regardless of the established difference, the named indicators were within the physiological norm. The concentration of cholesterol in the blood of pigs receiving the probiotic supplement decreased by 43.2%, but the concentration of calcium (by 26.2%) and phosphorus (by 17.9%) increased. In the experimental group, the blood indicators related to the immunity of pigs improved – the content of α1 and α2 globulins decreased by 4.1% and 7.4%, respectively. Also, in the experimental group, the concentration of albumins increased by 7.5%, which probably indicates an improvement in the functional state of the liver. As a result of feeding with a complex probiotic supplement in the experimental group the albumin-globulin ratio improved, which increased by 35.0%. Thus, the introduction of a complex probiotic feed additive into the ration of pigs changed the structure of the influence of exogenous and endogenous factors on metabolism, had a positive effect on the protein profile of the blood, and caused an increase of average daily gains in experimental animals by 5.8% compared to the control group.

Development of technology for functional pectin containing shubat and studying its detoxification properties

The article describes a method for obtaining a traditional shubat from camel milk of the Kazakh Bactrian breed using an active industrial starter culture from a mixture of lactic acid bacteria and provides a scheme for preparing pectincontaining shubat. It was found that due to the addition of liquid apple pectin, there is a significant improvement in physico-chemical, microbiological parameters, and biochemical composition; a significant decrease in the fermentation time and an increase in the shelf life of pectin-containing shubat compared with its traditional counterpart. In experiments on rats with cadmium intoxication, the introduction of 50 g/kg of pectin-containing shubat into the daily diet had a positive effect on hematological and biochemical blood parameters and contributed to improving the general condition of the studied animals, which indicates an increase in the detoxification properties of the resulting type of shubat and allows it to be used as a functional therapeutic and prophylactic product.

Haematological, biochemical and oxidative stress parameters of New Zealand rabbits housed at different stocking densities

The aim of this study was to investigate the effects of different stocking densities on oxidative stress, some hematological and biochemical blood parameters in New Zealand rabbits, and to determine the ideal cage area where rabbits can live without being stressed. A total of 36 1–month–old mixed sex New Zealand weaned rabbits were selected for the study. The rabbits were placed in cages at different densities of stocking. Experimental groups were 1 rabbit per cage (C1), 2 rabbits per cage (C2) and 3 rabbits per cage (C3). There was no significant differences between groups in terms of RBC, HGB, HCT, MCV, MCH, WBC, neutrophils, lymphocytes, monocytes, eosinophlis, basophlis, AST, ALT, trigliseride, cholesterol, HDL and LDL parameters (P&gt;0.05). C2 group had lower count of PLT comparing C1 and C3 groups. C1 group had the highest value for MCHC (P&lt;0.05). As oxidative stress parameters, there was no significant differences between IMA and TAS parameters (P&gt;0.05). C2 group had the lowest value in terms of SOD (P&lt;0.05). In conclusion C2 group was determined more advantageous in terms of breeding and welfare, since C1 group does not support social needs of the animals and C3 group leads to increased stress levels due to reduced individual space and restricted movement.

Influence of humic substances on growth performance and blood serum parameters in fattening turkeys

The present study was conducted to evaluate the effect of humic substances on performance and selected blood biochemical parameters in turkeys. A total of twenty 6-week-old turkey hybrids (Big 6) were divided into two groups. The first group of turkeys was fed the basal diet without any supplementation of humic substances as a control group. The second group was fed the basal diet supplemented with 5 g of humic substances per kg of diet. The study lasted 35 days, until the 11th week of age of the turkeys. The addition of humic substances had no effect on the live body weight, body weight gain, feed intake, feed conversion ratio, or growth rate of turkeys. Similarly, the monitored blood biochemical parameters, except for the levels of P, Mg, and Na, were not significantly affected by the addition of humic substances. The addition of humic substances led to a significant decrease in the concentration of P (p˂0.05), Mg (p˂0.05), and Na (p˂0.01) in the blood serum of turkeys. It was concluded that the addition of humic substances may lead to a reduction of some mineral substances in the blood of animals, which may be due to their chelating effects. This may indicate a reduced availability of some biologically important minerals for the body, which could subsequently manifest itself in some health issues and a decrease in animal production. During the duration of our study, there were no signs of disturbance in the health of the animals. In view of the achieved results, further studies will be necessary to determine the appropriate concentration and duration of administration of the monitored preparation and to evaluate its influence on the availability of nutrients and feed conversion and its possible use as a safe non-antibiotic growth stimulator in turkey nutrition.

Effect of sainfoin (Onobrychis viciifolia Scop.) seed-based diet on rats: A comprehensive evaluation of hemogram, biochemistry, and histopathology.

Sainfoin species (Onobrychis spp.) have been employed for centuries as an essential forage for ruminant animals, both for grazing and as hay. The seeds produced by sainfoin have also been investigated as an animal feed source and were indicated to be a particularly protein-rich supplement for monogastric animals. This study explores the effects of two sainfoin seed inclusion rates in rat diets compared to a control diet, focusing on blood biochemical parameters and a comprehensive histopathological evaluation of multiple organ systems. Thus, we provide a novel contribution to the body of evidence investigating sainfoin seeds as a protein supplement in monogastric animal diets. In this 21-day experiment, seven rats each were assigned to the control group, a 5% sainfoin seed group, and a 10% sainfoin seed group. The control group received standard feed and water; the second group received feed with 5% sainfoin seeds; and the third group received feed with 10% sainfoin seeds. At the experiment's end, necropsies and evaluations were conducted. Histopathological exams revealed normal organ structures in all 21 samples, regardless of the group. Blood analysis showed statistically significant decreases in creatine, ALT, P, Ca, and Mg levels in the sainfoin seed groups compared to the control group, with most values nearing reference levels, suggesting potential benefits. Notably, no adverse effects were observed when sainfoin seeds were included at 5% and 10% in the rat feed. These findings contribute to a growing body of research investigating the inclusion of sainfoin seeds in monogastric animal diets, which is a foundational component of assessing sainfoin's potential as a novel pulse crop for human consumption.

Analytical and Clinical Interference of Sample Hemolysis in Evaluating Blood Biochemical and Endocrine Parameters in Cows.

Hemolysis is a common cause of errors in laboratory tests as it affects blood parameters and leads to a positive or negative bias. This study aims to examine the relationship between the level of hemolysis (expressed as cell-free hemoglobin concentration, g/L) and the variability of metabolic and endocrine parameters and to determine the threshold level of hemolysis that causes an analytically and clinically significant bias for the twenty most frequently examined blood parameters in cows. Paired blood samples of 10 mL each were obtained from 30 cows. One was subjected to mechanical trauma and plasma was extracted directly from the other. Hemolyzed and non-hemolyzed samples from the same animal were mixed to obtain final samples with cell-free hemoglobin concentrations of 0, 1, 2, 4, 6, 8, and 10 g/L. Metabolic and endocrine parameters were measured in the samples and their deviation and the linear equation between the level of hemolysis and the deviation were determined. The following threshold values of hemolysis were determined, which correspond to the acceptable analytical (lower value) and clinical (upper value) levels of parameter variability: BHB 0.96 and 4.81; NEFA 0.39 and 3.31; GLU 0.38 and 3.90; ALB 1.12 and 6.11; TPROT 1.40 and 6.80; UREA 6.62 and 20.1; TBIL 0.75 and 5.65; AST 0.11 and 2.18; GGT 1.71 and 8.90, LDH 0.01 and 0.11, ALP 0.97 and 2.95; TGC 1.56 and 15.5; CHOL 1.29 and 8.56; Ca 5.68 and 25.7; P 0.57 and 8.43; Mg 1.10 and 8.47; INS 1.15 and 3.89; T3 8.19 and 15.6; T4 8.97 and 18.5; and CORT 2.78 and 11.22 g/L cell-free hemoglobin. Three decision levels are available for each metabolic and endocrine parameter: if hemolysis is below the lower (analytical) threshold value, results can be reported without restriction; if hemolysis is between the lower and upper thresholds, the results can be issued with guidance in the form of corrective linear equations; and if hemolysis is above the upper (clinical) threshold, the results and sample must be discarded. This method contributes to an optimal approach to hemolysis interference with metabolic profile parameters in blood samples from cows.

Blood-Chemistry Parameters Comparison among Different Age Stages of Chinese Sturgeon Acipenser sinensis

The Chinese sturgeon (Acipenser sinensis), a critically endangered migratory fish native to the Yangtze River estuary, is experiencing alarming population declines. Understanding the physiological and biochemical profiles of this species is paramount for its conservation. However, due to limited sample availability, blood biochemical parameters have remained understudied. In this study, we examined blood chemistry in artificially cultured Chinese sturgeon ranging from 2 to 15 years of age. Our results revealed age-related trends: total protein (TP), albumin (ALB), globulin (GLO), total cholesterol (CHOL), high-density lipoprotein (HDL), low-density lipoprotein (LDL), estrogen (E2), testosterone (T), testosterone undecanoate (11-KT), and red blood cell count (RBC) increased with age, while glucose (GLU), uric acid (UA), and serum creatinine (CREA) decreased. Levels of C-reactive protein (CRP) declined from 3 to 7 years but rose from 8 to 15 years. Blood parameters showed stabilization with age, indicating enhanced resilience and immunity. Significant alterations in parameters at ages 2–3 and 14–15 suggest critical developmental stages. These findings are crucial for understanding sturgeon growth, development, migration, and reproduction, underscoring the necessity for targeted conservation efforts during pivotal life stages.

Changes in rumen epithelial morphology and transcriptome, rumen metabolome, and blood biochemical parameters in lactating dairy cows with subacute rumen acidosis following rumen content transplantation

Interventions targeting the gut microbiota, such as fecal microbiota transplantation, prove effective in repairing the intestinal barrier and facilitating the recovery of its function and metabolism. However, the regulatory mechanisms governing the remodeling of rumen epithelial morphology and function, rumen metabolism, and host metabolism in cows of subacute ruminal acidosis (SARA) remain poorly understood. Here, we explored the changes in rumen epithelial morphology and transcriptome, rumen metabolome, and blood biochemical parameters in SARA cows following rumen content transplantation (RCT). The entire experiment consisted of 2 periods: the SARA induction period and the RCT period. During the SARA induction period, 12 ruminally cannulated lactating Holstein cows were randomly allocated into 2 groups, fed either a conventional diet [CON; n = 4; 40% concentrate, dry matter (DM) basis] or a high-grain diet (HG; n = 8; 60% concentrate, DM basis). Following the SARA induction period, the RCT period started. The HG cows were randomly assigned to 2 groups: the donor-recipient (DR) group and the self-recipient (SR) group. Rumen contents were entirely removed from both groups before RCT. For the DR group, cows were administered 70% rumen content from the CON cows, paired based on comparable body weight; for the SR group, each cow received 70% self-derived rumen content. The results revealed no significant differences in the thicknesses of the stratum corneum, granulosum, and spinosum/basale layers, as well as the total depth of the epithelium between the SR and DR groups. All these measurements exhibited a decreasing trend and fluctuations over time after the transfer. Notably, these fluctuations tended to stabilize at 13 or 16 d after RCT in the SR group, whereas they tended to stabilize after 8 or 13 d of transfer for the DR group. Transcriptome sequencing revealed that a total of 277 differentially expressed genes (DEGs) were identified between the 2 groups. Enrichment analysis showed that the DEGs were significantly enriched in 11 Gene Ontology biological processes and 14 KEGG pathways. The DEGs corresponding to almost any of these 11 biological process terms and 14 pathways showed mixed up- or downregulation following RCT. Metabolomics analysis indicated that a total of 33 differential metabolites were detected between the SR and DR groups, mainly enriched in 5 key metabolic pathways, including plant polysaccharides and starch degradation, lipid metabolism, amino sugar and nucleotide metabolism, purine metabolism, and Krebs cycle. Among them, the levels of differential metabolites associated with the degradation of plant polysaccharides and starches, metabolism of amino sugars and nucleotides, and purine metabolism pathways were significantly elevated in the DR cows. The results of blood biochemical parameters showed that the triglyceride concentration of the DR cows was increased than that of the SR cows, comparable to the level observed in the CON cows during the SARA induction period. Generally, our findings indicated that RCT facilitated the recovery of rumen epithelial morphological structure but did not promote its function recovery. Moreover, RCT enhanced rumen plant polysaccharide and starch degradation, amino sugar and nucleotide sugar metabolism, as well as purine metabolism. Additionally, it further promoted the recovery of plasma metabolites related to lipid metabolism.

Yeast protein: In vivo gastrointestinal digestion and biochemical characteristics

In this study, the digestion of yeast protein in the gastrointestinal tract of rats, and its effects on the blood biochemical parameters at different time points were investigated. Yeast protein was digested into peptides by pepsin in the stomach, broken down into dipeptides or amino acids by trypsin in the small intestine, and then absorbed by the rats or entered the colon. The peptide levels in gastric, small intestinal, and large intestinal digesta reached the highest level at 4 h, 2 h, and 8 h, respectively. Intact yeast protein in the gastric tract was found within 4 h, and no intact protein was present in intestinal digesta. Compared with gastric digesta, yeast protein intestinal digesta had much less distinguish and distinct stripes. Yeast protein ingestion increased the levels of immunoglobulin, high-density lipoprotein, and uric acid, and decreased the levels of total cholesterol, triglycerides, and low-density lipoprotein, while it did not significantly affect the levels of globulin, albumin, aspartate aminotransferase, and alanine aminotransferase in serum. This study demonstrated the digestion kinetics of yeast protein in the gastrointestinal tract of rats, and its beneficial effects on the blood biochemical parameters of rats and provided scientific evidence for yeast protein as an efficient and sustainable alternative protein source.