scholarly journals Acute and subacute toxicity of an ethanolic extract of Melandrii Herba in Crl:CD sprague dawley rats and cytotoxicity of the extract in vitro

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Eunsook Park ◽  
Mee-Young Lee ◽  
Chang-Seob Seo ◽  
Sae-Rom Yoo ◽  
Woo-Young Jeon ◽  
...  
Keyword(s):  
Ethanolic Extract ◽  
Sprague Dawley ◽  
Subacute Toxicity ◽  
Sprague Dawley Rats

scholarly journals Annona muricata's Leaves Ethanolic Extract Enhance p53 Expression in Rat Hepatic Cells Induced by Dimethylbenz(a)Anthracene (DMBA)

2013 ◽  
Vol 4 (1) ◽  
pp. 483 ◽  
Author(s):  
Rosa Adelina ◽  
Intan Sari Oktoberia ◽  
Putri Reno Intan
Keyword(s):  
Ethanolic Extract ◽  
Annona Muricata ◽  
Sprague Dawley ◽  
Independent Manner ◽  
P53 Expression ◽  
Hepatic Cells ◽  
Sprague Dawley Rats ◽  
Induction Process

Annona muricata or soursop contains acetogenin which can induce apoptosis in vitro and has cytotoxic effect. The study has been done to examine soursop leaves extract’s potency in vivo especially to induce apoptosis in 7,12-Dimethylbenz[a]anthracene (DMBA)-induced Sprague Dawley rats. The induction process was done twice a week for five weeks. The soursop leaves extract were given in three dosages, that are 200, 400, and 800 mg/kgBW for seventeen days after two weeks DMBA induction. Data analysis showed that Annona muricata leaves ethanolic extract could enhance p53 pathway significantly with a dose independent manner in DMBA-induced rats.Keywords: Proapoptosis,  Annona muricata leaves ethanolic extract, hepatoma

scholarly journals Effects of a Proprietary StandardizedOrthosiphon stamineusEthanolic Leaf Extract on Enhancing Memory in Sprague Dawley Rats Possibly via Blockade of Adenosine A2AReceptors

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Annie George ◽  
Sasikala Chinnappan ◽  
Yogendra Choudhary ◽  
Vandana Kotak Choudhary ◽  
Praveen Bommu ◽  
...  
Keyword(s):  
Social Memory ◽  
Recognition Task ◽  
Ethanolic Extract ◽  
Social Recognition ◽  
Sprague Dawley ◽  
Short Term ◽  
Antagonist Activity ◽  
Age Related ◽  
Sprague Dawley Rats

The aim of the study was to explore a propriety standardized ethanolic extract from leaves ofOrthosiphon stamineusBenth in improving impairments in short-term social memoryin vivo,possibly via blockade of adenosine A2Areceptors (A2AR). The ethanolic extract ofO. stamineusleaves showed significantin vitrobinding activity of A2AR with 74% inhibition at 150 μg/ml and significant A2AR antagonist activity with 98% inhibition at 300 μg/mL. A significant adenosine A1receptor (A1R) antagonist activity with 100%inhibition was observed at 300 μg/mL. Its effect on learning and memory was assessed via social recognition task using Sprague Dawley rats whereby the ethanolic extract ofO. stamineusshowed significant (p<0.001) change in recognition index (RI) at 300 mg/kg and 600 mg/kg p.o and 120 mg/kg i.p., respectively, compared to the vehicle control. In comparison, the ethanolic extract ofPolygonum minusaerial parts showed small change in inflexion; however, it remained insignificant in RI at 200 mg/kg p.o. Our findings suggest that the ethanolic extract ofO. stamineusleaves improves memory by reversing age-related deficits in short-term social memory and the possible involvement of adenosine A1and adenosine A2Aas a target bioactivity site in the restoration of memory.

scholarly journals Toxicological Assessment of Pseudospondias microcarpa (A. Rich.) Engl. Hydroethanolic Leaf Extract in Rats: Haematological, Biochemical, and Histopathological Studies

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Donatus Wewura Adongo ◽  
Priscilla Kolibea Mante ◽  
Kennedy Kwami Edem Kukuia ◽  
Charles Kwaku Benneh ◽  
Robert Peter Biney ◽  
...  
Keyword(s):  
Histopathological Examination ◽  
Ethanolic Extract ◽  
Histological Evaluation ◽  
Sprague Dawley ◽  
Very Low Density Lipoproteins ◽  
Toxicological Assessment ◽  
Subacute Toxicity ◽  
Sprague Dawley Rats ◽  
Histopathological Studies ◽  
General Appearance

Pseudospondias microcarpa is used traditionally for treating various diseases. However, although parts of the plant are extensively used in African traditional medicine, no scientific study has been reported on its toxicity. Therefore, this study evaluated the acute and subacute toxicity studies of the ethanolic extract of P. microcarpa in rats. Male Sprague-Dawley rats (120–150 g) were treated orally with the extract (30, 100, 300, 1000, and 3000 mg kg−1) or distilled water (10 ml kg−1) for 2 weeks and observed daily for general appearance and signs of toxicity. In addition, blood was collected for both biochemical and haematological assays. Sections of tissues from liver, kidney, spleen, brain, and stomach were also used for histopathological examination. Administration of the extract for 14 consecutive days caused no deaths, with an LD50 above 3000 mg kg−1. Except for lymphocytes (%) that showed a significant decrease (F5,23=3.93, P=0.013), all other haematological parameters remained unaffected by the extract. The extract at 100 mg kg−1 showed a significant decrease in the levels of triglyceride and very-low-density lipoproteins (both at P<0.05). Weight change as well as histological evaluation of the organs indicated no toxicity. The study demonstrates that an ethanolic extract of P. microcarpa given orally to rats is safe.

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

scholarly journals TRANSFERSOME GEL FORMULATION OF AN ETHANOL EXTRACT OF APPLES (MALUS DOMESTICA MILL) CONTAINING ANTIOXIDANTS AND IN VITRO PENETRATION TESTING USING FRANZ DIFFUSION CELLS

2017 ◽  
Vol 9 ◽  
pp. 32 ◽  
Author(s):  
Nurarita Fadila Zesiorani ◽  
Effionora Anwar
Keyword(s):  
Ethanol Extract ◽  
Sprague Dawley ◽  
Diffusion Cells ◽  
Sprague Dawley Rats ◽  
Apple Peel ◽  
Franz Diffusion Cells ◽  
Drug Efficiency ◽  
And Control ◽  
Peel Extract

Objective: This study aims to formulate and characterize a transfersome apple peel extract, formulate it into a gel, and compare it with a control gelmade without transfersome.Methods: Both gels were evaluated, stability tested, and penetration tested using Franz diffusion cells on the skin of female Sprague-Dawley rats. Thetransfersome preparations were formulated with different concentrations of the active substance, quercetin: 0.5% (F1); 0.7% (F2), and 1.0% (F3).Results: Based on the characterization results, F1 was selected as the optimum gel formulation because it had spherical morphology, a Dmean volume of106.44±2.70 nm, a polydispersity index of 0.078±0.01, a zeta potential of −49.96±2.05 mV, and a drug efficiency entrapment percentage of 78.78±0.46%.The cumulative amount of quercetin that was penetrated with the transfersome gel was 1514.41±26.31 μg/cm2, whereas the penetration with thecontrol gel extract was 1133.62±18.96 μg/cm2. The cumulative percentages of the penetrated gel transfersome and gel extract were 78.40±1.89%and 49.89±0.88%, respectively. The fluxes of transfersome gel and control gel extract were 52.33±0.11 μg/cm²/hrs and 40.89±0.68 μg/cm²/hrs,respectively.Conclusions: Based on these results, it can be concluded that the gel with transfersome exhibited better penetration than the gel extract alone.

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