Short report: Aqueous extract of chives (Allium schoenoprasum L.) plant impairs erythrocyte deformability in sickle cell patients

2021 ◽  
pp. 1-5
Author(s):  
Okan Arihan ◽  
Elie Nader ◽  
Gokhan Oto ◽  
Yilmaz Kocak ◽  
Romain Fort ◽  
...  
Keyword(s):  
Sickle Cell ◽  
Aqueous Extract ◽  
Plant Extract ◽  
Ex Vivo ◽  
Genetic Disorder ◽  
Erythrocyte Deformability ◽  
Short Report ◽  
Blood Samples ◽  
Allium Schoenoprasum ◽  
Apparently Healthy

Sickle cell anemia (SCA) is a genetic disorder characterized by chronic hemolysis and the presence of erythrocytes with low deformability, which may trigger vaso-occlusive crises. We tested the in-vitro effects of aqueous extract of vhives (Allium schoenoprasum L.) on erythrocyte deformability of SCA patients. Blood samples from 6 apparently healthy volunteers and 5 SCA patients were collected into heparin coated tubes. Both apparently healthy and SCA patient blood samples were incubated with 80μg/mL chives plant aqueous extract at 37°C for 60 min and erythrocyte deformability was measured by ektacytometry (3 Pa and 30 Pa; 37°C). Results of incubation of apparently healthy blood samples with plant extract showed that incubation did not alter erythrocyte deformability significantly. However, for SCA blood samples, erythrocyte deformability decreased significantly with plant extract exposure at 3 Pa (p <  0.043) and 30 Pa (p <  0.043). In conclusion, although ex-vivo incubation with plant extract does not fully model gastrointestinal processing of onions, the decrease in SCA erythrocyte deformability following incubation with aqueous chives should stimulate further studies to test the in-vivo effects of this diet in sickle cell mice.

scholarly journals Electrolyte Concentrations in Apparently Healthy Individuals after Consumption of Aqueous Extract of Jatropha tanjorensis

2018 ◽  
pp. 1-7
Author(s):  
Ibiene Sarah Kalio ◽  
Okorie Akuegbo Ezinne
Keyword(s):  
Aqueous Extract ◽  
The Body ◽  
Electrolyte Imbalance ◽  
Herbaceous Plant ◽  
Healthy Individuals ◽  
Selective Electrode ◽  
Blood Samples ◽  
Treatment Of Diabetes ◽  
Control Samples ◽  
Apparently Healthy

Jatropha tanjorensis is a herbaceous plant used locally for the treatment of diabetes, inflammation, and stomach ache in Nigeria. Longtime effect of Jatropha tanjorensis on electrolyte concentrations in the body is yet to be determined. This study was conducted to determine electrolyte concentrations in healthy individuals after consumption of aqueous extract of Jatropha tanjorensis. Seven (7) healthy individuals aged between 23-26 years, weighing 44-75 kg were recruited for the study. Blood samples were collected before the commencement of the study as control samples while test samples were collected on the 7th and 14th day of consumption of 7.8 g/175 ml of Jatropha tanjorensis daily for 14 days. The electrolyte was estimated using an ion selective electrode. The result showed that sodium (p<0.05), potassium (p<0.05), chloride (p<0.05), bicarbonate (p<0.05) and Anion gap (p<0.05) were significantly lower after 7 days of consumption of aqueous extract of Jatropha tanjorensis when compared to results before consumption of the extract. However, after 14 days of consumption of Jatropha tanjorensis aqueous extract, sodium and bicarbonate were lower (p<0.05) when compared to the values before consumption. The results suggest that Jatropha tanjorensis aqueous extract predispose consumers to electrolyte imbalance and metabolic acidosis.

scholarly journals Turmeric and Fenugreek - Herbal Agents to Alleviate Sickle Cell Disease

2021 ◽  
Vol 3 (7) ◽  
pp. 01-06
Author(s):  
Mohammed Yunus ◽  
Rawda Aljadar ◽  
Amr Zaher
Keyword(s):  
Sickle Cell Disease ◽  
Sickle Cell ◽  
Curcuma Longa ◽  
Genetic Disorder ◽  
Autosomal Recessive Inheritance ◽  
Medical Problem ◽  
Traditional Healers ◽  
Cell Disease ◽  
Blood Samples ◽  
Reversal Effect

Introduction: Sickle cell disease (SCD) is a genetic disorder with autosomal recessive inheritance causing abnormal hemoglobin. It is an important medical problem globally as well as in our community at Eastern province of Saudi Arabia. It accounts for large numbers of morbidity and to a lesser extent mortality. Several natural plant products over the world, which were known in some communities and their traditional healers, were studied and found to have properties in improving SCD manifestation. This research was planned to explore if any plant product under our study could prove being an effective anti-sickling agent for therapeutic use in SCD management. Objectives: Studying the effects of some plants on sickled RBCs as well as comparing between efficacies of these different plants. Material and Methods: The 49 fresh whole blood samples, extracted through venipuncture in EDTA tubes, were collected from known SCD patients whose homozygosity were confirmed by hemoglobin electrophoresis. These patients were not on recent blood transfusion or hydroxyurea, and aged 14 years or above of both sexes on clinical follow up. The dried rhizomes of turmeric (curcuma longa) powder and dried seeds flour of fenugreek (trigonella foenum-graecum) were used to evaluate the reversal type of anti-sickling activity on RBCs. Results: Out of 49 blood samples, 28 (57.1%) samples were from males and 21 (42.9%) samples from females. The average (±SD) age of the cases was 28.2 (±9.97) years with range 14 – 60 years. Significant anti-sickling activity was found using Turmeric rhizomes extract treatment with 66.81% reversal effect, and 61.28% anti-sickling action when fenugreek seeds extract was used. Conclusion: The findings of this study suggest that turmeric (C. longa) rhizome extract and fenugreek seed extract could have promising anti-sickling properties for SCD treatment.

scholarly journals Effect of Aqueous Extract of Antiaris Africana Stem Bark on Phagocytic Activities of Human Neutrophil Ex-Vivo

2021 ◽  
Author(s):  
Ibrahim O. Bello ◽  
Adebayo L. Adedeji
Keyword(s):  
Immune System ◽  
Aqueous Extract ◽  
Mechanism Of Action ◽  
Ex Vivo ◽  
Research Work ◽  
Stem Bark ◽  
The Body ◽  
Foreign Object ◽  
Immune Modulator ◽  
Apparently Healthy

ABSTRACTThe immune system is one of the most complex biological systems in the body. During infection, the immune system is under attack by a large number of viruses, bacteria, fungi and parasites. Immune response firstly involves, recognition of the pathogen or foreign object and secondly, a reaction to eliminate it. Aqueous extract of Antiaris africana is used to study their immune modulator activity. This plant has its various parts used in folk medicines. The mechanism of action has not been fully elucidated. Therefore, this research work studies the effect of aqueous extract of Antiaris Africana stem bark on phagocytic activities of neutrophil isolated from apparently healthy individual using a non-subjective commercial colourimetric assay kit obtained from Cell-Biolab Inc., USA. The purity and viability of isolated neutrophils were >90% and >95% respectively. The extract enhances neutrophil phagocytosis at 1.0, 5.0, 10.0, 15.0, 20.0 and 25 μg/ml by 2.5%, 11.6%, 18.4%, 24.4%, 31.2% and 38.2% respectively, compared to the control (100%). Hence, it was observed that neutrophil phagocytosis increases with increased extract concentrations. It can be concluded from the study that enhancement of phagocytosis may be the possible mechanism of action of the plant as an immune modulator.

scholarly journals Resolution of sickle cell disease–associated inflammation and tissue damage with 17R-resolvin D1

Blood ◽  
2019 ◽  
Vol 133 (3) ◽  
pp. 252-265 ◽  
Author(s):  
Alessandro Matte ◽  
Antonio Recchiuti ◽  
Enrica Federti ◽  
Bérengère Koehl ◽  
Thomas Mintz ◽  
...  
Keyword(s):  
Sickle Cell Disease ◽  
Sickle Cell ◽  
Ex Vivo ◽  
Vascular Dysfunction ◽  
Genetic Disorder ◽  
Cell Disease ◽  
Resolvin D1 ◽  
Activation Markers ◽  
Blood Leukocyte

Abstract Resolvins (Rvs), endogenous lipid mediators, play a key role in the resolution of inflammation. Sickle cell disease (SCD), a genetic disorder of hemoglobin, is characterized by inflammatory and vaso-occlusive pathologies. We document altered proresolving events following hypoxia/reperfusion in humanized SCD mice. We demonstrate novel protective actions of 17R-resolvin D1 (17R-RvD1; 7S, 8R, 17R-trihydroxy-4Z, 9E, 11E, 13Z, 15E, 19Z-docosahexaenoic acid) in reducing ex vivo human SCD blood leukocyte recruitment by microvascular endothelial cells and in vivo neutrophil adhesion and transmigration. In SCD mice exposed to hypoxia/reoxygenation, oral administration of 17R-RvD1 reduces systemic/local inflammation and vascular dysfunction in lung and kidney. The mechanism of action of 17R-RvD1 involves (1) enhancement of SCD erythrocytes and polymorphonuclear leukocyte efferocytosis, (2) blunting of NF-κB activation, and (3) a reduction in inflammatory cytokines, vascular activation markers, and E-selectin expression. Thus, 17R-RvD1 might represent a new therapeutic strategy for the inflammatory vasculopathy of SCD.

scholarly journals Ionophore-mediated swelling of erythrocytes as a therapeutic mechanism in sickle cell disease

Haematologica ◽  
2021 ◽  
Author(s):  
Athena C. Geisness ◽  
Melissa Azul ◽  
Dillon Williams ◽  
Hannah Szafraniec ◽  
Daniel C. De Souza ◽  
...  
Keyword(s):  
Blood Flow ◽  
Sickle Cell Disease ◽  
Cell Volume ◽  
Sickle Cell ◽  
Ex Vivo ◽  
Hemoglobin Concentration ◽  
Cell Disease ◽  
Osmotic Swelling ◽  
Blood Samples ◽  
Hypoxic Conditions

Sickle cell disease (SCD) is characterized by sickle hemoglobin (HbS) which polymerizes under deoxygenated conditions to form a stiff, sickled erythrocyte. The dehydration of sickle erythrocytes increases intracellular HbS concentration and the propensity of erythrocyte sickling. Prevention of this mechanism may provide a target for potential SCD therapy investigation. Ionophores such as monensin can increase erythrocyte sodium permeability by facilitating its transmembrane transport, leading to osmotic swelling of the erythrocyte and decreased hemoglobin concentration. In this study, we treated thirteen blood samples from patients with SCD with 10 nM of monensin ex vivo. We measured changes in cell volume and hemoglobin concentration in response to monensin treatment, and we perfused treated blood samples through a microfluidic device that permits quantification of blood flow under controlled hypoxia. Monensin treatment led to increases in cell volume and reductions in hemoglobin concentration in most blood samples, though the degree of response varied across samples. Monensin treated samples also demonstrated reduced blood flow impairment under hypoxic conditions relative to untreated controls. Moreover, here was a significant correlation between the improvement in blood flow and the decrease in hemoglobin concentration. Thus, our results demonstrate that a reduction in intracellular HbS concentration by osmotic swelling improves blood flow under hypoxic conditions. Although the toxicity of monensin prevents it from being a viable clinical treatment, these results suggest that osmotic swelling should be investigated further as a potential mechanism for SCD therapy.

Monitoring of r-Hirudin Anticoagulation during Cardiopulmonary Bypass – Assessment of the Whole Blood Ecarin Clotting Time

1997 ◽  
Vol 77 (05) ◽  
pp. 0920-0925 ◽  
Author(s):  
Bernd Pötzsch ◽  
Katharina Madlener ◽  
Christoph Seelig ◽  
Christian F Riess ◽  
Andreas Greinacher ◽  
...  
Keyword(s):  
Cardiopulmonary Bypass ◽  
Whole Blood ◽  
Heart Surgery ◽  
Ex Vivo ◽  
Open Heart Surgery ◽  
Clotting Time ◽  
Blood Samples ◽  
Alternative Approach ◽  
Ecarin Clotting Time

SummaryThe use of recombinant ® hirudin as an anticoagulant in performing extracorporeal circulation systems including cardiopulmonary bypass (CPB) devices requires a specific and easy to handle monitoring system. The usefulness of the celite-induced activated clotting time (ACT) and the activated partial thromboplastin time (APTT) for r-hirudin monitoring has been tested on ex vivo blood samples obtained from eight patients treated with r-hirudin during open heart surgery. The very poor relationship between the prolongation of the ACT and APTT values and the concentration of r-hirudin as measured using a chromogenic factor Ila assay indicates that both assays are not suitable to monitor r-hirudin anticoagulation. As an alternative approach a whole blood clotting assay based on the prothrombin-activating snake venom ecarin has been tested. In vitro experiments using r-hirudin- spiked whole blood samples showed a linear relationship between the concentration of hirudin added and the prolongation of the clotting times up to a concentration of r-hirudin of 4.0 µg/ml. Interassay coefficients (CV) of variation between 2.1% and 5.4% demonstrate the accuracy of the ecarin clotting time (ECT) assay. Differences in the interindividual responsiveness to r-hirudin were analyzed on r-hirudin- spiked blood samples obtained from 50 healthy blood donors. CV- values between 1.8% and 6% measured at r-hirudin concentrations between 0.5 and 4 µg/ml indicate remarkably slight differences in r-hirudin responsiveness. ECT assay results of the ex vivo blood samples linearily correlate (r = 0.79) to the concentration of r-hirudin. Moreover, assay results were not influenced by treatment with aprotinin or heparin. These findings together with the short measuring time with less than 120 seconds warrant the whole blood ECT to be a suitable assay for monitoring of r-hirudin anticoagulation in cardiac surgery.

scholarly journals Predicting chromosome damage in astronauts participating in international space station missions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alan Feiveson ◽  
Kerry George ◽  
Mark Shavers ◽  
Maria Moreno-Villanueva ◽  
Ye Zhang ◽  
...  
Keyword(s):  
International Space Station ◽  
Dose Response ◽  
Ex Vivo ◽  
Space Station ◽  
Space Radiation ◽  
Blood Samples ◽  
International Space ◽  
Significant Difference ◽  
Subject Specific

AbstractSpace radiation consists of energetic protons and other heavier ions. During the International Space Station program, chromosome aberrations in lymphocytes of astronauts have been analyzed to estimate received biological doses of space radiation. More specifically, pre-flight blood samples were exposed ex vivo to varying doses of gamma rays, while post-flight blood samples were collected shortly and several months after landing. Here, in a study of 43 crew-missions, we investigated whether individual radiosensitivity, as determined by the ex vivo dose–response of the pre-flight chromosome aberration rate (CAR), contributes to the prediction of the post-flight CAR incurred from the radiation exposure during missions. Random-effects Poisson regression was used to estimate subject-specific radiosensitivities from the preflight dose–response data, which were in turn used to predict post-flight CAR and subject-specific relative biological effectiveness (RBEs) between space radiation and gamma radiation. Covariates age, gender were also considered. Results indicate that there is predictive value in background CAR as well as radiosensitivity determined preflight for explaining individual differences in post-flight CAR over and above that which could be explained by BFO dose alone. The in vivo RBE for space radiation was estimated to be approximately 3 relative to the ex vivo dose response to gamma irradiation. In addition, pre-flight radiosensitivity tended to be higher for individuals having a higher background CAR, suggesting that individuals with greater radiosensitivity can be more sensitive to other environmental stressors encountered in daily life. We also noted that both background CAR and radiosensitivity tend to increase with age, although both are highly variable. Finally, we observed no significant difference between the observed CAR shortly after mission and at > 6 months post-mission.

scholarly journals Targeting pain at its source in sickle cell disease

2018 ◽  
Vol 315 (1) ◽  
pp. R104-R112 ◽  
Author(s):  
Kanika Gupta ◽  
Om Jahagirdar ◽  
Kalpna Gupta
Keyword(s):  
Sickle Cell Disease ◽  
Sickle Cell ◽  
Cell Activation ◽  
Molecular Mechanisms ◽  
Genetic Disorder ◽  
Somatosensory System ◽  
Organ Damage ◽  
Mast Cell Activation ◽  
Cell Disease ◽  
Central Nervous Systems

Sickle cell disease (SCD) is a genetic disorder associated with hemolytic anemia, end-organ damage, reduced survival, and pain. One of the unique features of SCD is recurrent and unpredictable episodes of acute pain due to vasoocclusive crisis requiring hospitalization. Additionally, patients with SCD often develop chronic persistent pain. Currently, sickle cell pain is treated with opioids, an approach limited by adverse effects. Because pain can start at infancy and continue throughout life, preventing the genesis of pain may be relatively better than treating the pain once it has been evoked. Therefore, we provide insights into the cellular and molecular mechanisms of sickle cell pain that contribute to the activation of the somatosensory system in the peripheral and central nervous systems. These mechanisms include mast cell activation and neurogenic inflammation, peripheral nociceptor sensitization, maladaptation of spinal signals, central sensitization, and modulation of neural circuits in the brain. In this review, we describe potential preventive/therapeutic targets and their targeting with novel pharmacologic and/or integrative approaches to ameliorate sickle cell pain.

3057 – MATURATION OF EX VIVO-CULTURED HUMAN ERYTHROCYTES AND SICKLE CELL DISEASE MODELLING USING CRISPR-CAS9

2020 ◽  
Vol 88 ◽  
pp. S55
Author(s):  
Yelena Boccacci ◽  
Guillaume Margaillan ◽  
Nellie Dumont ◽  
Mathieu Drouin ◽  
Yannick Doyon ◽  
...  
Keyword(s):  
Sickle Cell Disease ◽  
Sickle Cell ◽  
Ex Vivo ◽  
Human Erythrocytes ◽  
Disease Modelling ◽  
Cell Disease

Green synthesis of silver nanoparticles using aqueous extract of dried Juglans regia green husk and examination of its biological properties

2017 ◽  
Vol 6 (5) ◽  
Author(s):  
Zahra Abbasi ◽  
Sholeh Feizi ◽  
Elham Taghipour ◽  
Parinaz Ghadam
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Plant Extract ◽  
Room Temperature ◽  
Juglans Regia ◽  
Biological Properties ◽  
Rapid Process

AbstractSilver nanoparticles (AgNPs) have widespread applications. Recently, the synthesis of NPs using plant extract has attracted much attention. In this study, with an easy and rapid process at room temperature, AgNPs were produced by the aqueous extract of dried

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