scholarly journals Mumefural Improves Blood Flow in a Rat Model of FeCl3-Induced Arterial Thrombosis

Nutrients ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3795
Author(s):  
Jihye Bang ◽  
Won Kyung Jeon
Keyword(s):  
Blood Flow ◽  
Blood Vessels ◽  
Rat Model ◽  
Arterial Thrombosis ◽  
Thrombus Formation ◽  
Sprague Dawley ◽  
Fiber Damage ◽  
Sprague Dawley Rats ◽  
Related Proteins

Mumefural (MF), a bioactive component of the processed fruit of Prunus mume Sieb. et Zucc, is known to inhibit platelet aggregation induced by agonists in vitro. In this study, we investigated the anti-thrombotic effects of MF using a rat model of FeCl3-induced arterial thrombosis. Sprague–Dawley rats were intraperitoneally injected with MF (0.1, 1, or 10 mg/kg) 30 min before 35% FeCl3 treatment to measure the time to occlusion using a laser Doppler flowmeter and to assess the weight of the blood vessels containing thrombus. MF treatment significantly improved blood flow by inhibiting occlusion and thrombus formation. MF also prevented collagen fiber damage in injured vessels and inhibited the expression of the platelet activation-related proteins P-selectin and E-selectin. Moreover, MF significantly reduced the increased inflammatory signal of nuclear factor (NF)-κB, toll-like receptor 4 (TLR4), tumor necrosis factor (TNF)-α, and interleukin (IL)-6 in blood vessels. After administration, MF was detected in the plasma samples of rats with a bioavailability of 36.95%. Therefore, we suggest that MF may improve blood flow as a candidate component in dietary supplements for improving blood flow and preventing blood circulation disorders.

Activation of local aldosterone system within podocytes is involved in apoptosis under diabetic conditions

2009 ◽  
Vol 297 (5) ◽  
pp. F1381-F1390 ◽  
Author(s):  
Sun Ha Lee ◽  
Tae-Hyun Yoo ◽  
Bo-Young Nam ◽  
Dong Ki Kim ◽  
Jin Ji Li ◽  
...  
Keyword(s):  
Western Blot ◽  
Tunel Assay ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Sprague Dawley ◽  
Hoechst 33342 ◽  
Sprague Dawley Rats ◽  
Mrna And Protein Expression ◽  
Related Proteins

Previous studies have shown that mineralocorticoid receptor (MCR) blocker reduces proteinuria in diabetic nephropathy (DN), but the role of aldosterone in podocyte injury has never been explored in DN. This study was undertaken to elucidate whether a local aldosterone system existed in podocytes and to examine its role in podocyte apoptosis under diabetic conditions. In vitro, immortalized podocytes were exposed to 5.6 mM glucose (NG), NG + 24.4 mM mannitol, and 30 mM glucose (HG) with or without 10−7 M spironolactone (SPR). In vivo, 32 Sprague-Dawley rats were injected with diluent (C, n = 16) or streptozotocin intraperitoneally [diabetes mellitus (DM), n = 16], and 8 rats from each group were treated with SPR for 3 mo. Aldosterone synthase (CYP11B2) and MCR mRNA and protein expression were determined by real-time PCR and Western blot, respectively, and aldosterone levels by radioimmunoassay. Western blot for apoptosis-related molecules, Hoechst 33342 staining, and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay were performed to determine apoptosis. CYP11B2 and MCR expression were significantly higher in HG-stimulated podocytes and DM glomeruli compared with NG cells and C glomeruli, respectively, along with increased aldosterone levels. Western blot analysis revealed that cleaved caspase-3 and Bax expression was significantly increased, whereas Bcl-2 expression was significantly decreased in HG-stimulated podocytes and in DM glomeruli. Apoptosis determined by Hoechst 33342 staining and TUNEL assay were also significantly increased in podocytes under diabetic conditions. These changes in the expression of apoptosis-related proteins and the increase in apoptotic cells were inhibited by SPR treatment. These findings suggest that a local aldosterone system is activated and is involved in podocyte apoptosis under diabetic conditions.

scholarly journals Dynamic interaction between myogenic and TGF mechanisms in afferent arteriolar blood flow autoregulation

2000 ◽  
Vol 279 (5) ◽  
pp. F858-F865 ◽  
Author(s):  
Matthew Walker ◽  
Lisa M. Harrison-Bernard ◽  
Anthony K. Cook ◽  
L. Gabriel Navar
Keyword(s):  
Blood Flow ◽  
Tubuloglomerular Feedback ◽  
Sprague Dawley ◽  
Dynamic Activity ◽  
Analog To Digital ◽  
Sprague Dawley Rats ◽  
Response Slope ◽  
Tubular Flow ◽  
Collective Interactions

The dynamic activity of afferent arteriolar diameter (AAD) and blood flow (AABF) responses to a rapid step increase in renal arterial pressure (100–148 mmHg) was examined in the kidneys of normal Sprague-Dawley rats ( n = 11) before [tubuloglomerular feedback (TGF)-intact] and after interruption of distal tubular flow (TGF-independent). Utilizing the in vitro blood-perfused juxtamedullary nephron preparation, fluctuations in AAD and erythrocyte velocity were sampled by using analog-to-digital computerized conversion, video microscopy, image shearing, and fast-frame, slow-frame techniques. These assessments enabled dynamic characterization of the autonomous actions and collective interactions between the myogenic and TGF mechanisms at the level of the afferent arteriole. The TGF-intact and TGF-independent systems exhibited common initial (0–24 vs. 0–13 s, respectively) response slope kinetics (−0.53 vs. −0.47% ΔAAD/s; respectively) yet different maximum vasoconstrictive magnitude (−11.28 ± 0.1 vs. −7.02 ± 0.9% ΔAAD; P < 0.05, respectively). The initial AABF responses similarly exhibited similar kinetics but differing magnitudes. In contrast, during the sustained pressure input (13–97 s), the maximum vasoconstrictor magnitude (−7.02 ± 0.9% ΔAAD) and kinetics (−0.01% ΔAAD/s) of the TGF-independent system were markedly blunted whereas the TGF-intact system exhibited continued vasoconstriction with slower kinetics (−0.20% ΔAAD/s) until a steady-state plateau was reached (−25.9 ± 0.4% ΔAAD). Thus the TGF mechanism plays a role in both direct mediation of vasoconstriction and in modulation of the myogenic response.

scholarly journals Autistic Effects of Nootropic Drug Brahmi against Propionic Acid-induced Behavior and Memory Impairment in Rat Model

2021 ◽  
pp. 104-113
Author(s):  
P. K. Anamika ◽  
P. Muralidharan
Keyword(s):  
Propionic Acid ◽  
Rat Model ◽  
Memory Impairment ◽  
Root Extract ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Marble Burying ◽  
Group Ii

Aims: To evaluate the hydro alcoholic effect of Brahmi against propionic acid-induced behavior and memory impairment in rat model. Study Design: This includes preclinical study on Sprague Dawley rats in which Propionic acid induced and evaluation of in vivo and in vitro models were performed. Place and Duration of Study: Department of Pharmacology, C L Baid Metha College of Pharmacy Jan 2019 to June 2021. Methodology: We include a total of 27 adult Sprague Dawley Rats and induced propionic acid intracerebroventricular route to induce autism. Drug treatment using hydro alcoholic extract of Bacopa monnieri was given in 250 mg/kg and 500 mg/kg was compared with negative group rats and control groups. In vivo parameters like Actophotometer and marble burying test was done, In vitro analysis of Serotonin and Glutamate was estimated in the above treated groups. Results: The locomotor activity of rat was recorded individually for each animal using Actophotometer. HAEBM (250 mg/kg and 500 mg/kg) treated rat produced an increase in the level of significance (P<0.0001) on day one. In marble burying test Rats were located for thirty minutes in a standard cage covered with 5 cm depth of wood chip bedding with ten marbles evenly spaced. HAEBM (250 mg/kg and 500 mg/kg) showed significant (P<0.001) level of burying when compared to group-II rats (P<0.01). In this research study 5HT level showed a significant (P<0.001) increase in Group III, Group IV when compared with group-II (P<0.01). Glutamate is an excitatory Neurotransmitter. Group II showed significant increase (P<0.001) in the level of Glutamate but on drug treated groups III and IV shows decrease in concentration of glutamate. Conclusion: The present study findings showed that the hydro alcoholic root extract of brahmi possesses neuroprotective activity with significant nootropic effects. The hydro alcoholic root extract of Bacopa monnieri. L showed the presence of various Gabapentin and flavonoids phenols may be the reason for its neuroprotection and memory improvement effects.

Effect of Suloctidil on PgI2 Production and Inhibition of Platelet Aggregation

1979 ◽  
Author(s):  
J. Lansen ◽  
G. Biagi ◽  
P. Niebes ◽  
J. Gordon ◽  
R. Roncucci
Keyword(s):  
Platelet Aggregation ◽  
Vascular Tissue ◽  
Thrombus Formation ◽  
Blood Platelets ◽  
Vena Cava ◽  
Inhibitory Effect ◽  
Sprague Dawley ◽  
Sprague Dawley Rats

Recent findings have suggested that the in vivo balance between the biosynthesis of proaggregating substances by blood platelets (e.g. thromboxane A2, endoperoxides) and antiaggregating substances produced by the vessel wall (PGI2) might be critical for thrombus formation. We therefore investigated the effect of suloctidil (S), indomethacin (I), acetylsalicylic acid (ASA) and tranylcypromine (T) on these parameters. Male Sprague-Dawley rats (200-300 g) fasted for 12 h were given a single i.v. dose (0.5 and 1 mg/kg) of S (glucuronate salt) or 200 mg/kg of the other compounds. Ten min after the injection, rats were killed and segments of the abdominal aorta and inferior vena cava were excised. PGI2 production by these segments vascular tissue was assessed by platelet aggregation inhibitory activity. PGI2 production was almost completely inhibited by ASA, I and T whereas S enhanced the production (or possibly the effect) of PGI2-like activity. The effect of S was dose dependent and was statistically significant at 1 mg/kg. In vitro studies showed that 100 μM S potentiated the inhibitory effect of synthetic PGI2 on platelet aggregation.

scholarly journals Pharmacological comparison of four biopolymeric natural gums as hemostatic agents for management of bleeding wounds: preliminary in vitro and in vivo results

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Himanshu Kushwah ◽  
Nidhi Sandal ◽  
Meenakshi Chauhan ◽  
Gaurav Mittal
Keyword(s):  
Xanthan Gum ◽  
Guar Gum ◽  
Human Lymphocytes ◽  
Sprague Dawley ◽  
Gum Tragacanth ◽  
Civilian Trauma ◽  
Sprague Dawley Rats ◽  
Cytotoxicity Studies

Abstract Background Uncontrolled bleeding is one of the primary reasons for preventable death in both civilian trauma and military battle field. This study evaluates in vitro and in vivo hemostatic potential of four biopolymeric natural gums, namely, gum tragacanth, guar gum, xanthan gum, and gum acacia. In vitro evaluation of whole blood clotting time and erythrocyte agglutination assay were carried out. In vitro cytotoxicity studies with respect to each gum were done in human lymphocytes to ascertain percent cell viability. In vivo hemostatic potential of each gum (as sponge dressing and powder form) was evaluated in Sprague Dawley rats using tail bleeding assay and compared with commercially available hemostatic sponge. Other important parameters like (a) time taken for complete hemostasis, (b) amount of blood absorbed, (c) adherence strength of developed hemostatic dressing(s), (d) incidence of re-bleeding, and (e) survival of animals were also studied. Results Of the four test gums studied, xanthan gum (@3mg/ml of blood) and gum tragacanth (@35mg/ml of blood) were able to clot blood in least time (58.75±6.408 s and 59.00±2.082 s, respectively) and exhibited very good hemostatic potential in vitro. Except for xanthan gum, all other test gums did not exhibit any significant cytotoxicity at different time points till 24 h. In rat tail bleeding experiments, gum tragacanth sponge dressing and powder achieved hemostasis in least time (156.2±12.86 s and 76±12.55 s, respectively) and much earlier than commercially available product (333.3±38.84 s; p˂0.01). Conclusion Results indicate potential of gum tragacanth to be developed into a suitable hemostatic product.

Bioavailability in Vivo of Benzo[a]Pyrene Adsorbed to Diesel Particulate

1991 ◽  
Vol 7 (3) ◽  
pp. 125-139 ◽  
Author(s):  
David R. Bevan ◽  
David M. Ruggio
Keyword(s):  
Health Risks ◽  
Quantitative Description ◽  
Intratracheal Instillation ◽  
Direct Analysis ◽  
Sprague Dawley ◽  
Reasonable Estimate ◽  
Diesel Particulate ◽  
Sprague Dawley Rats

To evaluate health risks associated with exposure to particulates in the environment, it is necessary to quantify the bioavailability of carcinogens associated with the particulates. Direct analysis of bioavailability in vivo is most readily accomplished by adsorbing a radiolabeled form of the carcinogen to the particulate. A sam ple of native diesel particulate collected from an Oldsmobile die sel engine that contained 1.03 μ g benzo[ a] pyrene ( BaP)/ g particulate was supplemented with exogenous [ 3 H]- BaP to pro duce a particulate containing 2.62 μ g BaP/g. To insure that elu tion of BaP from native and [3 H] -BaP-supplemented particulate was similar, in vitro analyses were performed. When using phos pholipid vesicles composed of dimyristoylphosphatidylcholine (DMPC), 1.52% of total BaP was eluted from native particulate into the vesicles in 18 hrs; from [ 3 H] -BaP supplemented particu late, 1.68% was eluted. Using toluene as eluent, 2.55% was eluted from native particulate, and 8.25% from supplemented particulate, in 6 hrs. Supplemented particulate was then instilled intratracheally into male Sprague-Dawley rats and distribution of radioactivity was analyzed at selected times over 3 days. About 50% of radioactivity remained in lungs at 3 days following instil lation, with 30% being excreted into feces and the remainder dis tributed throughout the organs of the rats. To estimate the amount of radioactivity that entered feces through swallowing of a portion of the instilled dose, [3 H] -BaP-supplemented particu late was instilled intratracheally into rats that had a cannula sur gically implanted in the bile duct. Rate of elimination of radio activity into bile was monitored; 10.6% of radioactivity was re covered in 6 hr, an amount slightly lower than the 12.8% ex creted in 6 hrs into feces of animals with intact bile ducts. Our studies provide a quantitative description of the distribution of BaP and its metabolites following intratracheal instillation of diesel particulate. Because rates of elution of BaP in vitro are similar for native diesel particulate and particulate with supple mental [ 3H] -BaP, our results provide a reasonable estimate of the bioavailability in vivo of BaP associated with diesel particu late.

Safety Assessment of a Hydroethanolic Extract of Caralluma fimbriata

2013 ◽  
Vol 32 (5) ◽  
pp. 385-394 ◽  
Author(s):  
Antoinette Y. Odendaal ◽  
Narendra S. Deshmukh ◽  
Tennille K. Marx ◽  
Alexander G. Schauss ◽  
John R. Endres ◽  
...  
Keyword(s):  
Developmental Toxicity ◽  
Toxicity Study ◽  
Developmental Study ◽  
Sprague Dawley ◽  
Oral Toxicity ◽  
Toxicological Assessment ◽  
Sprague Dawley Rats ◽  
Chromosomal Aberration Test ◽  
Hydroethanolic Extract

This toxicological assessment evaluated the safety of a hydroethanolic extract prepared from Caralluma fimbriata (CFE), a dietary supplement marketed worldwide as an appetite suppressant. Studies included 2 in vitro genotoxicity assays, a repeated dose oral toxicity study, and a developmental study in rats. No evidence of in vitro mutagenicity or clastogenicity surfaced in the in vitro studies at concentrations up to 5000 μg of extract/plate (Ames test) or 5000 μg of extract/mL (chromosomal aberration test). No deaths or treatment-related toxicity were seen in the 6-month chronic oral toxicity study in Sprague-Dawley rats conducted at 3 doses (100, 300, and 1000 mg/kg body weight (bw)/d). The no observed effect level for CFE in this study was considered to be 1000 mg/kg bw/d. A prenatal developmental toxicity study conducted at 3 doses (250, 500, and 1000 mg/kg bw/d) in female Sprague-Dawley rats resulted in no treatment-related external, visceral, or skeletal fetal abnormalities, and no treatment-related maternal or pregnancy alterations were seen at and up to the maximum dose tested. CFE was not associated with any toxicity or adverse events.

Metabolism of triallate in Sprague-Dawley rats. 3. In vitro metabolic pathways

1993 ◽  
Vol 41 (1) ◽  
pp. 141-147 ◽  
Author(s):  
Amy G. Hackett ◽  
John J. Kotyk ◽  
Hideji. Fujiwara ◽  
Eugene W. Logusch
Keyword(s):  
Metabolic Pathways ◽  
Sprague Dawley ◽  
Sprague Dawley Rats
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