scholarly journals Bioavailability and Safety of Lipid Fraction from Different Taxa of Microalgae in Female C57BL/6 Mice

2021 ◽  
Vol 12 (5) ◽  
pp. 6845-6862
Keyword(s):  
Toxic Effect ◽  
Blood Cells ◽  
Cytokine Production ◽  
Lipid Fraction ◽  
White Blood Cells ◽  
Blood Levels ◽  
Proliferative Potential ◽  
Functional Activities ◽  
Acute Toxic Effect

Microalgae exhibit antioxidant, anti-inflammatory effects. In this study, we analyzed the toxicity of lipid fraction of different taxa of microalgae in female C57BL/6 mice. The number of red blood cells, white blood cells and subsets, hemoglobin, number, and functional activities of immature and mature immunocytes, biochemical parameters in blood serum, and kidney and liver extract were investigated. It is shown that the lipid fraction of microalgae had no acute toxic effect on body weight, glucose blood levels, and hemopoiesis in mice. Some changes in the number of immature and mature lymphocytes, proliferative potential, Ig levels, cytokine production were determined. In vivo lipid fraction of microalgae caused changes in cytokine, protein, lipid, purine, aminotransferases, and sex hormone level in mice. Obtained data indicate that lipid fraction dietary administration in female C57BL/6 mice does not have a toxic effect on the animal.

scholarly journals STUDIES ON THE PATHOGENESIS OF ACUTE INFLAMMATION

1960 ◽  
Vol 111 (1) ◽  
pp. 45-64 ◽  
Author(s):  
Fred Allison ◽  
Margie G. Lancaster
Keyword(s):  
Blood Cells ◽  
Blood Clotting ◽  
Acute Inflammation ◽  
White Blood Cells ◽  
Blood Stream ◽  
Blood Levels ◽  
Primary Role ◽  
Low Levels

The relation of intravascular fibrin to the leucocytic sticking reaction in ear chambers of rabbits injured by heat was investigated in two ways. First, attempts were made to destroy the thin layer of fibrin believed to coat the surfaces of cells involved in the sticking reaction. Second, white cell sticking was studied after fibrinogen had been removed from the blood stream. The results of these experiments were as follows:— 1. Activation of fibrinolysin in vivo by streptokinase did not impair sticking of white blood cells. 2. Administration of streptokinase parenterally did not lower fibrinogen blood levels appreciably even when the amount used was large. 3. Thromboplastin infusions alone reduced circulating fibrinogen to low levels but leucocytic sticking was not prevented. Furthermore, frequent death of animals due to pulmonary embolism made such experiments prohibitive. 4. Addition of streptokinase to thromboplastin infusions protected against embolic deaths but did not influence sticking even though the fibrinogen levels achieved were quite low. 5. Finally, when thrombin was added to infusions of thromboplastin and streptokinase, no circulating fibrinogen could be detected. Under such circumstances leucocytic sticking following heat injury occurred without reduction. These findings were interpreted as evidence against a primary role of the blood clotting mechanism in causing the sticking of white blood cells to injured endothelium. Alternative explanations were discussed.

scholarly journals In-vivo Antiplasmodial Effect of Dihydroartemisinin-Piperaquine-Nitrofurantoin on Plasmodium berghei- Infected Mice

2021 ◽  
pp. 12-20
Author(s):  
Udeme O. Georgewill ◽  
Festus Azibanigha Joseph ◽  
Elias Adikwu
Keyword(s):  
Plasmodium Berghei ◽  
Blood Cells ◽  
Hematological Parameters ◽  
White Blood Cells ◽  
Positive Control ◽  
Negative Control ◽  
Antiplasmodial Activity ◽  
Significant Difference ◽  
Tract Infections

Nitrofurantoin (NT) used for the treatment of urinary tract infections may have antiplasmodial activity. Dihydroartemisinin-piperaquine (DP) is an artemisinin based combination therapy used for the treatment of malaria. This study evaluated the antiplasmodial effect of dihydroartemisinin-piperaquine-nitrofurantoin (DP-NT) on mice infected with Plasmodium berghei. Adult Swiss albino mice (30-35 g) of both sexes were used. The mice were randomly grouped, inoculated with Plasmodium berghei, and treated orally with DP (1.7/13.7 mg/kg), NT (57.1 mg/kg) and DP-NT (1.71/13.7/ 57.1 mg/kg), respectively using curative, prophylactic and suppressive tests. The negative control was orally treated with normal saline (0.3 mL), while the positive control was orally treated with chloroquine CQ (10mg/kg). After treatment, blood samples were collected and evaluated for percentage parasitemia, inhibitions and hematological parameters. Liver samples were evaluated for histological changes. The mice were observed for mean survival time (MST). Treatment with DP-NT decreased parasitemia levels when compared to individual doses of DP and NT with significant difference observed at p<0.05. DP-NT prolonged MST when compared to individual doses of DP and NT with significant difference observed at p<0.05. The decrease in packed cell volume, red blood cells, hemoglobin and increase in white blood cells in parasitized mice were significantly restored by DP-NT  when compared to individual doses of DP and NT with difference observed at p<0.05. DP-NT eradicated liver Plasmodium parasite.  NT remarkably increased the antiplasmodial activity of DP. DP-NT may be used for the treatment of malaria.

scholarly journals Gene expression of the heat stress response in bovine peripheral white blood cells and milk somatic cells in vivo

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
J. B. Garner ◽  
A. J. Chamberlain ◽  
C. Vander Jagt ◽  
T. T. T. Nguyen ◽  
B. A. Mason ◽  
...  
Keyword(s):  
Gene Expression ◽  
Heat Stress ◽  
Blood Cells ◽  
White Blood Cells ◽  
Somatic Cells ◽  
Holstein Friesian ◽  
Milk Somatic Cells ◽  
Peripheral White Blood Cells ◽  
Friesian Cows

Abstract Heat stress in dairy cattle leads to reduction in feed intake and milk production as well as the induction of many physiological stress responses. The genes implicated in the response to heat stress in vivo are not well characterised. With the aim of identifying such genes, an experiment was conducted to perform differential gene expression in peripheral white blood cells and milk somatic cells in vivo in 6 Holstein Friesian cows in thermoneutral conditions and in 6 Holstein Friesian cows exposed to a short-term moderate heat challenge. RNA sequences from peripheral white blood cells and milk somatic cells were used to quantify full transcriptome gene expression. Genes commonly differentially expressed (DE) in both the peripheral white blood cells and in milk somatic cells were associated with the cellular stress response, apoptosis, oxidative stress and glucose metabolism. Genes DE in peripheral white blood cells of cows exposed to the heat challenge compared to the thermoneutral control were related to inflammation, lipid metabolism, carbohydrate metabolism and the cardiovascular system. Genes DE in milk somatic cells compared to the thermoneutral control were involved in the response to stress, thermoregulation and vasodilation. These findings provide new insights into the cellular adaptations induced during the response to short term moderate heat stress in dairy cattle and identify potential candidate genes (BDKRB1 and SNORA19) for future research.

Biochemical and haematological changes associated with short periods of work in draught oxen

1989 ◽  
Vol 48 (2) ◽  
pp. 375-384 ◽  
Author(s):  
R. Anne Pearson ◽  
R. F. Archibald
Keyword(s):  
Heart Rate ◽  
Blood Cells ◽  
Inorganic Phosphate ◽  
White Blood Cells ◽  
Blood Parameters ◽  
Blood Levels ◽  
Blood Samples ◽  
Haematological Changes ◽  
Work Done ◽  
Friesian Cattle

ABSTRACTBlood samples were taken from three Brahman × Friesian cattle while they walked for 1 h daily on a treadmill pulling 20 or 25 kg weights suspended in a cage. Heart rate and energy expenditure during work were closely correlated. The work had no significant effect on blood levels of red cells, haemoglobin, packed cell volume, total protein, albumin, glycerol, urea, Mg, Ca, Na, K and chloride. White blood cells, glucose, lactate, free fatty acids, P-hydroxybutyrate and inorganic phosphate were affected by work although the changes were shortlived and values had returned to resting levels 75 min after work finished. The changes were similar in each animal and indicated work done by draught cattle is largely at a submaximal level. Apart from lactate no blood parameters were identified that could be usefully used to compare performance.

Induction of Transient Cytopenia To Analyze Hematopoiesis in Mutant Mice.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 3158-3158
Author(s):  
William L. Stanford ◽  
Nicole M. Anderson ◽  
Mark D. Minden ◽  
Dwayne L. Barber
Keyword(s):  
Blood Cells ◽  
White Blood Cells ◽  
Erythropoietin Receptor ◽  
Blood Levels ◽  
Pharmacological Agents ◽  
Recovery Curves ◽  
Stress Erythropoiesis ◽  
Cell Counts ◽  
B Mice ◽  
Dose Dependent

Abstract The mouse plays an indispensable role in developing our current understanding of mammalian hematopoiesis. Most hematopoietic phenotyping assays in the mouse are non-viable techniques designed to evaluate homeostatic populations, enumerate progenitor populations, and perform functional analysis. The worldwide effort to generate mouse models of human disease and functionally annotate the mammalian genome using mouse mutagenesis (including dominant ENU screens) requires the development of robust standardized viable phenotyping tools. We have developed a phenotyping assay that induces transient cytopenias using various pharmacological agents (5-fluorouracil, phenylhydrazine, and hydroxyurea), the responses to which are monitored by tracing changes in peripheral blood levels of red blood cells, white blood cells and platelets. We have performed detailed analysis of lineage recovery kinetics, developing lineage recovery curves for various strains of mice for both males and females, which allowed us to identify appropriate testing days to identify phenodeviants. We have compared the recovery data with conventional progenitor assays and analyzed a cohort of well-studied naturally occurring and targeted hematopoietic mutants using the transient anemia assays that has yielded novel phenotypes of hemizygous mutant animals. For example, erythropoietin receptor null embryos die of severe anemia at mid-gestation; however, no defect in erythropoiesis has been reported in EpoR +/− mice. We have found that 5-fluorouracil and phenylhydrazine elicit delayed RBC recovery in EpoR +/− mice, demonstrating a critical dose-dependent role for the erythropoietin receptor in stress erythropoiesis. In addition, Stat5 has been shown to play an important role in erythropoiesis and in the regulation of steady state hematopoiesis. We have found that Stat5a/b+/− mice treated with 5-fluorouracil show altered recovery kinetics in RBC, WBC and platelets. Finally, we have adapted the transient cytopenia assay to develop a sensitized dominant ENU screen, enabling us to identify hematopoietic mutants that do not present abnormal blood cell counts in a homeostatic state. Thus, these standardized cytopenia response assays function as surrogate viable assays to analyze progenitor populations.

scholarly journals STAT3 methylation in white blood cells as a novel sensitive biomarker for the toxic effect of low-dose benzene exposure

2016 ◽  
Vol 5 (3) ◽  
pp. 800-807 ◽  
Author(s):  
Di Liu ◽  
Yujiao Chen ◽  
Pengling Sun ◽  
Wenlin Bai ◽  
Ai Gao
Keyword(s):  
Dna Methylation ◽  
Toxic Effect ◽  
Health Effects ◽  
Blood Cells ◽  
Low Dose ◽  
White Blood Cells ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Benzene Exposure

A cross-sectional study was conducted in a sample of 571 workers to explore the toxic effect and early sensitive biomarker of the health effects of low-dose benzene exposure (LDBE), as well as the correlation between DNA methylation and the toxic effect of LDBE.

scholarly journals DNA Damaging Effects, Oxidative Stress Responses and Cholinesterase Activity in Blood and Brain of Wistar Rats Exposed to Δ9-Tetrahydrocannabinol

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1560 ◽  
Author(s):  
Nevenka Kopjar ◽  
Nino Fuchs ◽  
Suzana Žunec ◽  
Anja Mikolić ◽  
Vedran Micek ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dna Damage ◽  
Comet Assay ◽  
Stress Responses ◽  
Blood Cells ◽  
Genome Stability ◽  
White Blood Cells ◽  
Brain Cells ◽  
Alkaline Comet Assay

Currently we are faced with an ever-growing use of Δ9-tetrahydrocannabinol (THC) preparations, often used as supportive therapies for various malignancies and neurological disorders. As some of illegally distributed forms of such preparations, like cannabis oils and butane hash oil, might contain over 80% of THC, their consumers can become intoxicated or experience various detrimental effects. This fact motivated us for the assessments of THC toxicity in vivo on a Wistar rat model, at a daily oral dose of 7 mg/kg which is comparable to those found in illicit preparations. The main objective of the present study was to establish the magnitude and dynamics of DNA breakage associated with THC exposure in white blood and brain cells of treated rats using the alkaline comet assay. The extent of oxidative stress after acute 24 h exposure to THC was also determined as well as changes in activities of plasma and brain cholinesterases (ChE) in THC-treated and control rats. The DNA of brain cells was more prone to breakage after THC treatment compared to DNA in white blood cells. Even though DNA damage quantified by the alkaline comet assay is subject to repair, its elevated level detected in the brain cells of THC-treated rats was reason for concern. Since neurons do not proliferate, increased levels of DNA damage present threats to these cells in terms of both viability and genome stability, while inefficient DNA repair might lead to their progressive loss. The present study contributes to existing knowledge with evidence that acute exposure to a high THC dose led to low-level DNA damage in white blood cells and brain cells of rats and induced oxidative stress in brain, but did not disturb ChE activities.

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