scholarly journals Mentha longifolia lowers blood pressure in anesthetized rats through multiple pathways

2016 ◽  
Vol 11 (4) ◽  
pp. 784 ◽  
Author(s):  
Abdul Jabbar Shah ◽  
Ishfaq Ali Bukhari ◽  
Anwarul Hassan Gilani
Keyword(s):  
Blood Pressure ◽  
Crude Extract ◽  
Video Clip ◽  
Chloroform Fraction ◽  
Response Curves ◽  
Aqueous Fraction ◽  
Anesthetized Rats ◽  
High K ◽  
Mentha Longifolia ◽  
Dose Dependent

<p>This study was aimed to investigate the effect of the extract of <em>Mentha longifolia</em> on blood pressure and the possible mechanisms. In anesthetized rats, the crude extract of <em>M. </em>longifolia and aqueous and chloroform fractions caused a dose-dependent fall in mean arterial pressure. Atropine pretreatment abolished the effect of extract and aqueous fraction but did not change that of chloroform fraction. In rabbit aortic rings, crude extract relaxed phenylephrine (1 µM) and high K<sup>+</sup> (80 mM) pre-contractions. Chloroform fraction was more potent against high K<sup>+</sup>, similar to verapamil and caused a rightward shift in the Ca<sup>++</sup> concentration-response curves. Aqueous fraction partially relaxed high K<sup>+</sup> pre-contractions. In rat aortic rings, crude extract and aqueous fraction-induced endothelium-dependent atropine-sensitive vasodilator effect. Extract and fractions also relaxed high K<sup>+</sup> precontractions. In guinea-pig atrial strips, crude extract and chloroform fraction suppressed force and rate of contractions, similar to verapamil. In conclusion, <em>M. </em>longifolia lowers blood pressure through Ca<sup>++</sup> channel blockade and atropine-sensitive-NO pathway.</p><p><strong>Video Clip:</strong></p><p><a href="https://youtube.com/v/Fz0MrZ6q2WI">Experiment using aorta:</a> 2 min 35 sec </p>

scholarly journals Calcium entry blocking activity of the Elaeagnus umbellata fruit extract explains its use in diarrhea and gut spasm

2016 ◽  
Vol 11 (3) ◽  
pp. 585 ◽  
Author(s):  
Nayyab Rafique ◽  
Taous Khan ◽  
Abdul Jabbar Shah
Keyword(s):  
Ethyl Acetate ◽  
Crude Extract ◽  
Video Clip ◽  
Ethyl Acetate Fraction ◽  
Response Curves ◽  
Aqueous Fraction ◽  
Elaeagnus Umbellata ◽  
High K ◽  
Medicinal Use ◽  
Rabbit Jejunum

<p class="Abstract">This study was aimed to explore the pharmacological basis of potential medicinal use of <em>Elaeagnus umbellata</em> in gut disorders. Crude extract of <em>E. umbellata</em>, which was found positive for flavonoids, terpenoids and tannins, provided 9.9-71.9% protection in castor oil-induced diarrhea in mice, like verapamil. In isolated rabbit jejunum preparations, crude extract caused inhibition of spontaneous and high K<sup>+</sup>-induced contractions, with respective EC<sub>50</sub> values of  0.3 (0.1-0.5) and 0.5 mg/mL, suggesting Ca<sup>++</sup> channel blockade (CCB). Pretreatment of tissue with crude extract (0.1–1 mg/mL) caused a rightward shift in Ca<sup>++</sup> concentration-response curves. With the exception of aqueous fraction, <em>n</em>-hexane, chloroform and ethyl acetate inhibited spontaneous and high K<sup>+</sup>-induced contractions and displaced rightward Ca<sup>++</sup> concentration-response curves. Extract was found safe up to 10 mg/kg in mice. Our data shows that anti-diarrheal effect of crude extract of <em>E. umbellate</em> is due to CCB-mediated spasmolytic effect, concentrated in the ethyl acetate fraction and suggests its medicinal importance in diarrhea and spasm.</p><p><strong>Video Clip</strong></p><p><a href="https://youtube.com/v/Qo_y3ULC4E0">Isolation of rat jejunum</a>:  2 min 32 sec </p>

scholarly journals Dual receptors blocked mechanism arbitrates smooth muscles relaxant effect of Polypodium vulgare

2016 ◽  
Vol 11 (2) ◽  
pp. 414 ◽  
Author(s):  
Syeda Batool Naz ◽  
Mueen Ahmad Chaudhry ◽  
Shafeeq Ur Rahaman
Keyword(s):  
Urinary Bladder ◽  
Crude Extract ◽  
Video Clip ◽  
Smooth Muscles ◽  
Tissue Preparation ◽  
Response Curves ◽  
Relaxant Effect ◽  
High K

<p class="Abstract">The study was aimed to validate the traditional uses of <em>Polypodium vulgare</em> in disorders associated with smooth muscle contraction and to describe its possible underlying mechanism(s) by using <em>in vitro</em> and <em>in vivo</em> experimental techniques. Rhizome’s extract of <em>P. vulgare</em> reversed the high K<sup>+ </sup>(80 mM) and carbachol (1 µM) mediated contractions in isolated rabbit jejunum (5 and 10 mg/mL), trachea (5 and 10 mg/mL) and urinary bladder (3 and 10 mg/mL), with higher potency against carbachol than high K<sup>+</sup>, similar to dicyclomine. A rightward shift in carbachol cumulative response curves was observed in the presence of crude extract (1-3 mg/mL), similar to dicyclomine. Crude extract exhibited a dose-dependent (300-500 mg/kg) protective effect against castor oil-induced diarrhea in mice. Presence of dual blacked mechanism behind the smooth muscles relaxant effect of the crude extract, unveil medicinal significance of <em>P. vulgare</em> in GIT, respiratory and urinary bladder disorders.</p><p class="Abstract"><strong>Video clip</strong></p><p class="Abstract"><a href="https://youtube.com/v/Ya9Rhtlg3bE">Tissue preparation</a>: 3 min 5 sec</p><p> </p>

scholarly journals Calcium channels blocked activity: Providing the basis for medicinal use of Abies pindrow in diarrhea and bronchitis

2015 ◽  
Vol 10 (2) ◽  
pp. 430 ◽  
Author(s):  
Sohaib Mushtaq ◽  
Mueen Ahmad Chaudhry ◽  
Hafiz Muhammad Abdul Rahman
Keyword(s):  
Calcium Channels ◽  
Crude Extract ◽  
Dependent Manner ◽  
Response Curves ◽  
Traditional Practice ◽  
Concentration Dependent Manner ◽  
Medicinal Uses ◽  
High K ◽  
Medicinal Use ◽  
Abies Pindrow

<p><em>Abies pindrow</em> is widely used in traditional practice for the treatment of diarrhea and bronchitis and the present study was designed to validate its folkloric uses. The crude extract of <em>A. pindrow</em> inhibit spontaneously contracting (1-10 mg/mL) and high K<sup>+</sup> (80 mM)-induced pre-contracted rabbit jejun-um (3 mg/mL) in concentration dependent manner. A rightward shift in Ca<sup>+2</sup> concentration response curves was seen in the presence of crude extract (0.1-0.3), similar to verapamil. In isolated tracheal tissue, <em>A. pindrow</em> inhibited, high K<sup>+</sup> and carbachol (1 µM)-induced contractions, at 3 mg/mL and 10 mg/mL respectively, similar to that caused by verapamil. These results indicate the presence of calcium channels blocked activity in crude extract of <em>A. pindrow</em>, which provide sound basis for medicinal uses of<em> A. pindrow</em> in diarrhea and bronchitis.   </p><p> </p>

Measurement of sympathetic nerve activity in the unanesthetized rat

1989 ◽  
Vol 67 (1) ◽  
pp. 250-255 ◽  
Author(s):  
J. P. Fluckiger ◽  
G. Gremaud ◽  
B. Waeber ◽  
A. Kulik ◽  
A. Ichino ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Arterial Pressure ◽  
Sympathetic Nerve ◽  
Sympathetic Nerve Activity ◽  
Blood Pressure Reduction ◽  
Response Curves ◽  
Nerve Activity ◽  
Dose Dependent

A new system was developed in our laboratory to continuously monitor intra-arterial pressure, heart rate, and sympathetic nerve activity in unanesthetized rats. The animals were prepared 24 h before the start of the experiments. Sympathoneural traffic was measured at the level of splanchnic nerve. The amplitude of the spikes recorded at this level was utilized to express sympathetic nerve activity. The amplitude of the residual electroneurogram signal present 30 min after the rats were killed was 32 +/- 2 mV (mean +/- SE; n = 11). For analysis, these background values were subtracted from values determined in vivo. The nerve we studied contains postganglionic fibers, since electrical activity decreased in response to ganglionic blockade with pentolinium (1.25 mg/min iv for 4 min). The amplitude of spikes fell by 43 +/- 4% (n = 4). Sympathetic nerve activity was highly reproducible at a 24-h interval (104 +/- 26 vs. 111 +/- 27 mV for the amplitude of spikes; n = 11). Dose-response curves to the alpha 1-stimulant methoxamine and to bradykinin were established in four rats. The increase in blood pressure induced by methoxamine caused a dose-dependent fall in sympathetic nerve activity, whereas the blood pressure reduction resulting from bradykinin was associated with a dose-dependent activation of sympathetic drive. These data therefore indicate that it is possible with out system to accurately measure sympathetic nerve activity in the awake rat, together with intra-arterial pressure and heart rate.

scholarly journals Studies on antidiarrheal and laxative activities of aqueous-ethanol extract of Asphodelus tenuifolius and underlying mechanisms

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Naveed Aslam ◽  
Khalid Hussain Janbaz
Keyword(s):  
Crude Extract ◽  
Castor Oil ◽  
Aqueous Ethanol ◽  
Intestinal Transit ◽  
In Vivo Studies ◽  
Control Group ◽  
Phytochemical Screening ◽  
Response Curves ◽  
Aqueous Fraction ◽  
Spasmolytic Activity

Abstract Background Asphodelus tenuifolius Cav. (Asphodelaceae) has traditional reputability in treatment of diarrhea and constipation but no scientific study has been reported for its gastrointestinal effects. Present study was conducted to evaluate antidiarrheal and laxative activities of the plant. Methods Aqueous-ethanol crude extract of Asphodelus tenuifolius (At.Cr) was subjected to phytochemical screening and liquid-liquid fractionation. In vivo studies of charcoal meal intestinal transit test, antidiarrheal activity against castor oil induced diarrhea and laxative activity were performed in mice. In vitro experiments were conducted upon rabbit jejunum preparations using standard tissue bath techniques. Results Phytochemical screening indicated presence of alkaloids, anthraquinones, flavonoids, saponins, steroids, tannins and phenols in At.Cr. In charcoal meal intestinal transit test, At.Cr increased (p < 0.001) intestinal motility at 100 mg/kg dose, but decreased (p < 0.001) it at 500 mg/kg dose, when compared to the control group. At.Cr (300–700 mg/kg) provided protection from castor oil induced diarrhea in mice, which was significant (p < 0.001) at 500 and 700 mg/kg doses, as compared to the saline treated control group. At.Cr (50 and 100 mg/kg) enhanced total and wet feces counts in normal mice, as compared to saline treated control. In jejunum preparations, At.Cr inhibited spontaneous, K+ (80 mM) and K+ (25 mM) mediated contractions, similar to verapamil. Pre-incubation of jejunum preparations with At.Cr resulted in rightward nonparallel shift in Ca+ 2 concentration response curves, similar to verapamil. The spasmolytic activity was concentrated in ethylacetate fraction. Aqueous fraction exhibited spasmogenicity upon spontaneous contractions, which was blocked in presence of verapamil, but remained unaffected by other tested antagonists. Conclusion The Asphodelus tenuifolius crude extract possesses gut modulatory activity, which may normalize gut functions in diarrhea and constipation. The spasmolytic activity of the extract was found to be mediated through Ca+ 2 channel blocking action. The spasmogenic activity, found partitioned in aqueous fraction, possibly involves Ca+ 2 influx through voltage gated Ca+ 2 channels. The study supports ethnic uses of the plant in diarrhea and constipation.

scholarly journals Ethnopharmacological basis for antispasmodic, antidiarrheal and antiemetic activities of Ceratonia siliqua pods

2017 ◽  
Vol 12 (4) ◽  
pp. 384
Author(s):  
Irfan Hamid ◽  
Khalid Hussain Janbaz
Keyword(s):  
Crude Extract ◽  
Video Clip ◽  
Dependent Manner ◽  
Ceratonia Siliqua ◽  
Spasmolytic Activity ◽  
Rabbit Jejunum ◽  
Pre Treatment ◽  
Dose Dependent

<p class="Abstract">The study was conducted to provide the ethnopharmacological bases of the crude extract of seed pods of <em>Ceratonia siliqua</em> in the gastrointestinal spasm, diarrhea and emesis. In segregated rabbit jejunum, it showed dose-dependent (0.01-10 mg/mL) relaxation of spontaneous as well as carbachol (1 µM)-induced contraction. Pre-treatment of segregated rat ileum with <em>C. siliqua</em>, significantly (p&lt;0.0001) suppressed the carbachol (1 µM)-induced contraction similar to atropine (1 µM). These results indicated that <em>C. siliqua</em> possesses spasmolytic activity through possible blockage of muscarinic receptor in jejunum preparations. Furthermore, the crude extract inhibited the castor oil-induced diarrhea, charcoal meal propulsion in mice and copper sulfate-induced retches in chicks in a dose-dependent manner (100, 200, 300 mg/kg). These in vitro and in vivo results indicate that <em>C. siliqua</em> possesses the spasmolytic and antidiarrheal activities mediated possibly through blockage of muscarinic receptors. Thus, this study provides a rationale for its folkloric use.</p><p><strong>Video Clip of Methodology</strong>:</p><p>12 min 42 sec   <a href="https://www.youtube.com/v/BQGWdIZqpsY">Full Screen</a>   <a href="https://www.youtube.com/watch?v=BQGWdIZqpsY">Alternate</a></p>

scholarly journals Chemical analysis of phenolic compounds and determination of anti-oxidant, antimicrobial and cytotoxic activities of organic extracts of Pinus coulteri

2018 ◽  
Vol 13 (2) ◽  
pp. 120 ◽  
Author(s):  
Soumia Merah ◽  
Dahmane Dahmane ◽  
Soumeya Krimat ◽  
Hafidha Metidji ◽  
Ahmed Nouasri ◽  
...  
Keyword(s):  
Crude Extract ◽  
Biological Activities ◽  
Video Clip ◽  
Reducing Power ◽  
Biologically Active ◽  
Cytotoxic Activities ◽  
Chloroform Fraction ◽  
Organic Extracts ◽  
Anti Oxidant ◽  
Pinus Coulteri

<p class="Abstract">New bioactive natural products, the phenolic composition and the biological activities of organic extracts from the needles of the Algerian <em>Pinus coulteri</em> were investigated. The analysis by HPLC-DAD of crude extract revealed the presence of 10 phenolic acids and nine flavonoids. In vitro anti-oxidant activities were performed using four different tests. The greatest antiradical activity was found in the ethyl acetate fraction (IC<sub>50 </sub>= 3.2 ± 0.3 µg/mL), whereas the diethyl ether fraction had the higher contents of total phenolics and flavonoids and exhibited a highest activity in reducing power and β-carotene–linoleic acid tests with EC<sub>50</sub>= 67.1 ± 0.4 μg/mL and 71.5 ± 0.2% of inhibition, respectively. Furthermore, a low to moderate antimicrobial activity according to all extracts was revealed against eight bacteria tested. The MIC value of chloroform fraction showed a strong degree of antibacterial activity (&lt;0.09 mg/mL). The crude extract was found toxic with LC<sub>50</sub> value of 15.2 μg/mL by brine shrimp toxicity assay. The needle extract of <em>P. coulteri</em> is rich in valuable biologically active compounds and could represent a new resource of anti-oxidant agents for the treatment of diseases.</p><p class="Abstract"><strong>Video Clip of Methodology:</strong></p><p class="Abstract">Disc diffusion test: 6 min 41 sec   <a href="https://www.youtube.com/v/-sfOw7qg5ws">Full Screen</a>   <a href="https://www.youtube.com/watch?v=-sfOw7qg5ws">Alternate</a></p>

Antioxidant and Anti-Melanogenic Activities of Pakoba Leaves (Syzygium sp) from North Celebes

2019 ◽  
Vol 2 (2) ◽  
pp. 79-83
Author(s):  
Dela Rosa ◽  
Catherine Roeroe ◽  
Agustina Susanti
Keyword(s):  
Antioxidant Activity ◽  
Crude Extract ◽  
Leaf Extract ◽  
Methanol Extract ◽  
Chloroform Fraction ◽  
Aqueous Fraction ◽  
Ic50 Value ◽  
Dpph Method ◽  
Good Potential ◽  
Crude Methanol Extract

In this research the potential of Pakoba leaf extract to be used as antioxidant and skin whitening (anti-melanogenic agent) is investigated. The antioxidant activity of Pakoba leaves were studied using DPPH method and the result showed that the 80 percent methanol crude extract has strong antioxidant activity with an IC50 value of 22.66 ± 1.02 μg/ml. The aqueous fraction of the sample has an IC50 value of 53.30 ± 1.42 μg/ml, followed by n-butanol fraction (53.63 ± 1.45 μg/ml) and chloroform fraction (511.54 ± 1.59 μg/ml). The anti-melanogenic activity of the crude methanol extract showed IC50 value of 316.56 ± 11.04 μg/ml. Thus, it isconcluded that crude extract of Pakoba leaves shows good potential as the antioxidant source although it does not show good anti- melanogenic activity.

scholarly journals In Vitro α-Amylase and α-Glucosidase Inhibitory and Antioxidant Activities of the Crude Extract and Solvent Fractions of Hagenia abyssinica Leaves

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Zemene Demelash Kifle ◽  
Simachew Gidey Debeb ◽  
Yaschilal Muche Belayneh
Keyword(s):  
Ethyl Acetate ◽  
Crude Extract ◽  
Antioxidant Activities ◽  
Ethyl Acetate Fraction ◽  
Maximum Activity ◽  
Chloroform Fraction ◽  
Aqueous Fraction ◽  
Water Fraction ◽  
Hagenia Abyssinica

Background. The leaves of Hagenia abyssinica have been used in the management of diabetes mellitus in Ethiopian folk medicine. Thus, this study is aimed at investigating the in vitro α-amylase and α-glucosidase inhibitory and antioxidant activities of the crude extract and solvent fractions of H. abyssinica leaves. Methods. The in vitro α-amylase and α-glucosidase inhibitory and antioxidant activities of the plant extract were assessed using 3,5-dinitrosalicylic acid (DNSA), p-nitro-phenyl-a-D glucopyranoside (p-NPG), and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays, respectively. Each value of percent inhibition of α-amylase, α-glucosidase, and DPPH scavenging effect was presented as means ± SEM ( n = 3 ). Results. The α-amylase inhibitory activity of the crude extract and solvent fractions was found to be concentration-dependent. The strongest activity was exhibited by the crude extract at the highest concentration with a percentage inhibition of 74.52% (IC50, 14.52 μg/ml) followed by water fraction 68.24% (IC50, 16.31 μg/ml), ethyl acetate fraction 61.57% (IC50, 18.73 μg/ml), and chloroform fraction 56.87% (IC50, 21.57 μg/ml) of H. abyssinica leaves. In the α-glucosidase inhibition assay, the maximum activity was exhibited by the aqueous fraction 62.54% (IC50, 11.67 μg/ml) followed by ethyl acetate fraction 54.97% (IC50, 15.89 μg/ml), crude extract 46.79% (IC50, >16.5 μg/ml), and chloroform fraction 36.44% (IC50, >16.5 μg/ml). In the antioxidant assay, the crude extract exhibited the highest antioxidant activity 86.36% (IC50, 10.25 μg/ml) followed by water fraction 78.59% (IC50, 13.86 μg/ml), ethyl acetate fraction 71.58% (IC50, 16.34 μg/ml), and chloroform fraction 63.65% (IC50, 18.83 μg/ml). Conclusion. This study has revealed that H. abyssinica leaves possess noticeable in vitro α-amylase and α-glucosidase inhibitory and antioxidant activities.

scholarly journals Evaluation of Antiulcer Activity of 80% Methanol Extract and Solvent Fractions of the Root of Croton macrostachyus Hocsht: Ex Del. (Euphorbiaceae) in Rodents

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Alefe Norahun Mekonnen ◽  
Seyfe Asrade Atnafie ◽  
Mohammedbirhan A. Wahab Atta
Keyword(s):  
Peptic Ulcer ◽  
Ethyl Acetate ◽  
Crude Extract ◽  
Antiulcer Activity ◽  
Chloroform Fraction ◽  
Sprague Dawley ◽  
Aqueous Fraction ◽  
Pylorus Ligation ◽  
Croton Macrostachyus ◽  
Ulcer Model

Background. Peptic ulcer disease causes significant mortality and morbidity. Plant kingdom provides a useful source for the development of new antiulcer agents. Croton macrostachyus is traditionally used to treat peptic ulcer in Ethiopia. This study aimed to evaluate the antiulcer activity of C. macrostachyus root extracts in rodents using different models. Methods. The crude extract was obtained by cold maceration in 80% methanol and fractionated with chloroform, ethyl acetate, and distilled water. The antiulcer activity was evaluated using pylorus ligation-induced ulcer model in Sprague Dawley rats and acidified ethanol-induced ulcer model in Swiss albino mice. The test groups received three doses (100, 200, and 400 mg/kg) of the crude extract and fractions for 7 days before induction of ulcer. Positive controls received omeprazole 30 mg/kg for the pylorus ligation-induced ulcer model and sucralfate 100 mg/kg for the acidified ethanol-induced ulcer model. Negative controls received vehicle (2% tween 80). Results. The crude hydromethanolic extract of C. macrostachyus showed significant (p<0.05) antiulcer activity on both pyloric ligation and HCl/ethanol-induced ulcer in rats and mice. It has antisecretary effect (p<0.001) as well. All three administered doses of chloroform fraction (p<0.05) and only higher doses of ethyl acetate fraction (p<0.05) possessed significant antiulcer activity. In contrast, the aqueous fraction did not have significant antiulcer effect at all tested doses. Conclusion. The present study demonstrated that the crude extract, chloroform, and ethyl acetate fractions possessed significant dose-dependent antiulcer activity.

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