scholarly journals General and Genetic Toxicology of Guayusa Concentrate (Ilex guayusa)

2016 ◽  
Vol 35 (2) ◽  
pp. 222-242 ◽  
Author(s):  
Robert W. Kapp ◽  
Odete Mendes ◽  
Shambhu Roy ◽  
Robert S. McQuate ◽  
Richard Kraska
Keyword(s):  
Human Lymphocytes ◽  
Lethal Dose ◽  
Blood Chemistry ◽  
Positive Control ◽  
Female Rats ◽  
Control Group ◽  
High Dose ◽  
Genetic Toxicology ◽  
Male And Female Rats

Tea from the leaves of guayusa ( Ilex guayusa) has a long history of consumption by Ecuadorian natives in regions where the plant is indigenous. The tea contains the methylxanthines caffeine and theobromine as well as chlorogenic acids, flavonoids, and sugars. Various studies were performed to evaluate the general and genetic toxicology of a standardized liquid concentrate of guayusa (GC). Guayusa concentrate was found to be negative in in vitro genotoxicity tests including the Ames test and a chromosome aberration study in human lymphocytes. The oral median lethal dose (LD50) of GC was >5,000 mg/kg for female rats. Guayusa concentrate was administered to male and female rats in a 90-day subchronic study at 1,200, 2,500, and 5,000 mg/kg/d of GC and a caffeine-positive control at 150 mg/kg/d corresponding to the amount of caffeine in the high-dose GC group. Effects observed in the GC-treated groups were comparable to those in the caffeine control group and included reductions in body weights, food efficiency, triglycerides values, and fat pad weights and increases in blood chemistry values for serum aspartate aminotransferase, serum alanine aminotransferase, and cholesterol and adaptive salivary gland hypertrophy. No signs of incremental toxicity due to any other components of guayusa were observed. The studies indicate no harmful effects of GC in these test systems.

scholarly journals Evaluation of Acute and Subacute Toxicities of Psidium guajava Methanolic Bark Extract: A Botanical with In Vitro Antiproliferative Potential

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Hermione T. Manekeng ◽  
Armelle T. Mbaveng ◽  
Samuel A. Ntyam Mendo ◽  
Armel-Joseph D. Agokeng ◽  
Victor Kuete
Keyword(s):  
Body Weight ◽  
Lethal Dose ◽  
Relative Weight ◽  
Psidium Guajava ◽  
Toxicity Study ◽  
Female Rats ◽  
Bark Extract ◽  
Control Group ◽  
High Dose ◽  
Subacute Toxicity

The methanol crude extract of the bark of Psidium guajava (guava) previously displayed interesting cytotoxic effects on a panel of human cancer cell lines. In the present work, we plan to determine the toxicological effects of this guava botanical in Wistar rats. Acute oral toxicity of the extract was carried out by administration of a single dose of 5000 mg/kg body weight to female rats in 14 days. Subacute toxicity was conducted by oral administration of the extract at daily doses of 250 mg/kg, 500 mg/kg, and 1000 mg/kg body weight, respectively, while rats in the control group received no extract. After 28 days of treatment, animals were sacrificed for hematological and biochemical studies. In the acute toxicity study, no mortality or signs of toxicity were recorded; hence, the median lethal dose (LD50) of the Psidium guajava bark extract is greater than 5000 mg/kg body weight. For the subacute toxicity study, significant variations in body weight, relative weight of organs, and biochemical parameters were observed in the animals treated at different doses of the plant extract compared to control animals. Histopathological analyses showed minor liver inflammation in females treated at the highest dose (1000 mg/kg). These results suggest that intake of a single high dose of the Psidium guajava bark extract is nontoxic, but repeat administration could exhibit mild organ toxicity.

scholarly journals Effects of Funchicórea®, a Traditional Brazilian Herbal Complex, on Intestinal Motility in Healthy and Constipated Rodents

2020 ◽  
pp. 26-36
Author(s):  
Valéria L. Assis ◽  
Ana C. M. F. Veras ◽  
Priscilla M. P. Maciel ◽  
José G. F. Albuquerque ◽  
Carmem Zancanella ◽  
...  
Keyword(s):  
Scientific Data ◽  
Intestinal Transit ◽  
Female Rats ◽  
Control Group ◽  
Male Mice ◽  
Spasmolytic Activity ◽  
Rat Ileum ◽  
Male And Female Rats

Ethnopharmacological Relevance: The traditional herbal medicinal product Funchicórea® has been widely used in clinical practice for the treatment of intestinal colic and constipation in newborns. However, no scientific data on the herbal product to prove its efficacy is available. Aim of the Study: This study aimed to evaluate the laxative and spasmolytic actions of Funchicórea®. Materials and Methods: Wistar rats (Rattus norvegicus) and Swiss mice (Mus musculus) of both sex, were used. In vivo pharmacological assays were performed to evaluate the stimulating effect on the gastrointestinal tract, and in vitro studies to verify its spasmodic activity. Results: Funchicórea® increased the motility of the small intestine in male mice at doses of 100 mg/kg (161.66±14.86 %, n=6) and 200 mg/kg (151.04±17.17 %, n=6) compared to control (100.00±10.49 %, n=6). However, this drug did not induce any change in intestinal transit in female mice. The intestinal transit of male mice treated with loperamide (3 mg/kg/day, during three days) was reduced 66.25±7.49 % (n=8) compared to the control group (100.00±5.16%, n=8) and we observed the normalization of the intestinal transit in constipated animals treated with Funchicórea® 100 mg/Kg (98.42±6.33 %, and 200 mg/kg (99.32±8.47%, n=7). Similar results were observed in the quantification for 24 hours of male and female rats faeces constipated by loperamide (3 mg/kg/day three days), however, in both animals groups treated with Funchicórea® 100 mg/kg (1.24±2.90 g, male; 3.60±0.80 g, female, n=6) and 200 mg/Kg (8.70±2.01 g, male, 10.03±1.30 g, female, n=6) the levels of faeces returned to basal values compared to constipated group (4.01±1.43 g, male; 1.70±0.10 g, female, n=6). In addition, Funchicórea® (0.01-1000 μg/mL) elicited relaxation in rat ileum pre-contracted by KCl 40 mM (Emax=97.5±7.0 %, n=7) and carbachol (1 μM, Emax=100.0±7.0 %, n=7). Conclusion: The results obtained demonstrated that the herbal medicine Funchicórea® acts by stimulating the intestine of rats and mice and has spasmolytic activity in isolated rat ileum.

scholarly journals In vitro trichomonocidal potency of Naja nigricollis and Bitis arietans snake venom

2021 ◽  
Vol 7 (1) ◽  
pp. 6-11
Author(s):  
Tijjani Sabiu Imam ◽  
Zainab Tukur ◽  
Aisha Abdullahi Bala ◽  
Nuraddeen Bello Ahmad ◽  
Adamu Yunusa Ugya
Keyword(s):  
Snake Venom ◽  
Trichomonas Vaginalis ◽  
Inhibitory Concentration ◽  
Lethal Dose ◽  
Positive Control ◽  
Probit Analysis ◽  
Control Group ◽  
Significant Difference ◽  
Ld50 Value

Background and Aim: Trichomonas vaginalis drug's limited efficacy and high toxicity, justify the need to explore other therapeutic agents, including animal toxins. In this study, the Naja nigricollis and Bitis arietans snake venoms were used to assess such trichomonocidal effect. Materials and Methods: The median lethal dose (LD50) value for both snake species was calculated by probit analysis using a statistical package for the sciences version 20.0 with an LD50 of 4.04 μg/mL for the N. nigricollis, and no mortality was observed in the B. arietans envenomed rats. Results: The trichomonocidal potency of the snake venom on T. vaginalis was evident with a growth inhibitory concentration of 89% with a half-maximal inhibitory concentration (IC50) of 0.805 μg/mL in B. arietans while 95% for N. nigricollis at an IC50 of 0.411 μg/mL. Conclusion: The statistical analysis of one-way analysis of variance shows a significant difference (p<0.05) between the venoms and positive control group (p<0.001), and there is no significant difference between each venom and its varying concentration (p>0.05). As the least concentration can be useful, interestingly, there is no significant difference in the efficacy of N. nigricollis and B. arietans to T. vaginalis (p>0.05); as such, either of the venom can be used for the treatment of trichomoniasis.

scholarly journals Effects of nandrolone decanoate on respiratory and peripheral muscles in male and female rats

1997 ◽  
Vol 82 (4) ◽  
pp. 1112-1118 ◽  
Author(s):  
Anja Bisschop ◽  
Ghislaine Gayan-Ramirez ◽  
Hélène Rollier ◽  
P. N. Richard Dekhuijzen ◽  
René Dom ◽  
...  
Keyword(s):  
Female Rats ◽  
Fatigue Properties ◽  
Saline Control ◽  
High Dose ◽  
Type I ◽  
Nandrolone Decanoate ◽  
Adult Rats ◽  
Male And Female ◽  
Male And Female Rats

Bisschop, Anja, Ghislaine Gayan-Ramirez, Hélène Rollier, P. N. Richard Dekhuijzen, René Dom, Vera de Bock, and Marc Decramer. Effects of nandrolone decanoate on respiratory and peripheral muscles in male and female rats. J. Appl. Physiol. 82(4): 1112–1118, 1997.—Thirty male and 18 female adult rats received weekly an intramuscular injection of either saline (control; C), 1.5 mg/kg (low-dose; LD) nandrolone decanoate or 7.5 mg/kg (high-dose; HD) nandrolone decanoate during 5 wk. Compared with respective C, growth rate was stunted in male HD rats from 2 wk of treatment on, whereas it was enhanced in female LD and HD rats after 1 wk. Mass of all muscles studied varied proportionally to body weight, except for the gastrocnemius (males: 0.49 ± 0.04 vs. C: 0.52 ± 0.03%, not significant; females: 0.17 ± 0.01 vs. C: 0.15 ± 0.01%, P < 0.05). In vitro contractile and fatigue properties of the diaphragm remained unchanged, except for a decrease in twitch kinetics (time to peak tension: C, 21 ± 2; LD, 19 ± 1; HD, 19 ± 2 ms, P < 0.05; half-relaxation time: C, 26 ± 5, LD, 25 ± 5, HD, 23 ± 3 ms, P < 0.01). Histochemistry of the diaphragm and the gastrocnemius revealed a significant increase in type IIx/b dimensions. In the gastrocnemius, type I fiber dimensions also increased. A pair-fed study, including another 24 female rats, showed that the changes in oral food intake only partly accounted for the observed anabolic effects.

scholarly journals Subacute Toxicity Profile of Lacidipine Nanoformulation in Wistar Rats

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Rupesh Shirodkar ◽  
Chandrasekhar Misra ◽  
Chethan GH ◽  
Pallavi Shetty ◽  
Zenab Attari ◽  
...  
Keyword(s):  
Body Weight ◽  
Wistar Rats ◽  
The Body ◽  
Female Rats ◽  
Male Rats ◽  
Control Group ◽  
High Dose ◽  
Testis Weight ◽  
Delayed Effect ◽  
Male And Female Rats

The present study was aimed at investigating the safety of Lacidipine (LCDP) loaded nanostructured lipid carriers (NLCs) in Wistar rats. NLCs were formulated using ultrasound dispersion technique. Animals were orally treated once daily with NLCs containing 0.140 mg, 0.350 mg, and 0.875 mg of LCDP as low, medium, and high dose per kg body weight, respectively, during 28 days along with blank formulation and pure LCDP. Control rats were fed with water. Animals were observed throughout experiment period and their body weight was recorded once weekly. Overnight fasted rats were sacrificed on the 29th day. Study revealed no signs or symptoms of toxicity or morbidity. No significant changes in the body weight were observed between treated and control group. Significant increase in left testis weight and liver weight was observed in male and female rats, respectively. Haematological estimation revealed significant decrease in haemoglobin count in male rats while female rats showed significant increase in granulocyte count. All the serum clinical parameters were within the normal range and no gross histopathological changes were observed. No delayed effect was noted in satellite group. The results indicate that developed LCDP loaded NLCs are safe when administered orally in rats.

Characterization of the inhibitory roles of RFRP3, the mammalian ortholog of GnIH, in the control of gonadotropin secretion in the rat: in vivo and in vitro studies

2010 ◽  
Vol 299 (1) ◽  
pp. E39-E46 ◽  
Author(s):  
R. Pineda ◽  
D. Garcia-Galiano ◽  
M. A. Sanchez-Garrido ◽  
M. Romero ◽  
F. Ruiz-Pino ◽  
...  
Keyword(s):  
Inhibitory Effect ◽  
Female Rats ◽  
Male Rats ◽  
High Dose ◽  
Gonadotropin Secretion ◽  
Male And Female Rats ◽  
Sites Of Action ◽  
Lh Secretion

RF-amide related peptides (RFRP), as putative mammalian orthologs of the avian gonadotropin-inhibitory hormone (GnIH), have been proposed as key regulators of gonadotropin secretion in higher vertebrates. Yet considerable debate has arisen recently on their physiological relevance and potential mechanisms and sites of action. Present studies were undertaken to further characterize the effects of RFRP on LH and FSH secretion by a combination of in vivo and in vitro approaches in male and female rats. Initial screening via intracerebroventricular (icv) administration of different analogs of RFRP1 (RFRP1–12 and RFRP1–20) and RFRP3 (RFRP3–8 and RFRP3–17), as well as the related neuropeptide FF (NPFF8), to gonadectomized (GNX) female rats evidenced significant, albeit modest, inhibitory effects on LH secretion only for RFRP3–8 and RFRP3–17, which were detectable at the high dose rage (1 nmol for RFRP3–8, 5 nmol for RFRP3–17). This moderate inhibitory action was also documented after icv administration of RFRP3–8 to intact and GNX male rats. In addition, systemic (intravenous) administration of RFRP3–8 decreased the circulating levels of both gonadotropins in GNX male rats. Likewise, RFRP3–8 inhibited basal and GnRH-stimulated LH secretion by pituitaries from GNX males in vitro. This inhibitory effect was blocked by the antagonist of RFRP receptors, RF9. In summary, our results support a putative inhibitory role of RFRP3 as ortholog of GnIH in the regulation of gonadotropin secretion in mammals, which appears to involve direct pituitary actions as well as potential central (hypothalamic) effects.

scholarly journals Test of the Aphrodisiac Effect of Ethanol Extract of Roots, Stems and Leaves of Packaged Plants (Smilax rotundifolia) on Male White Rats (Sprague Dawley)

2021 ◽  
Vol 5 (4) ◽  
pp. 280-285
Author(s):  
Kiki Rizki Handayani ◽  
Ayu Wulandari
Keyword(s):  
Ethanol Extract ◽  
Positive Control ◽  
Female Rats ◽  
Colloid Solution ◽  
Control Group ◽  
Sprague Dawley ◽  
Plant Parts ◽  
White Rats ◽  
Male And Female Rats ◽  
Group B

Developing countries use medicinal plants for aphrodisiac treatment, one of which is a pack plant (Smilax rotundifolia) which is commonly used to enlarge male genitalia in Papua Indonesia. Because these claims are not scientifically tested and proven, at this time This study aims to determine the effect of the ethanol extract of S. rotundifolia stem and leaf tubers on the parameters of sexual behavior in male Sprague Dawley rats. As well as fear the most effective plant parts have aphrodisiac activity. Thirty rats were divided into 5 groups (A-E) consisting of group A given 0.5% Na CMC colloid solution (normal control), group B given X-gra® suspension dosage 51.37 mg / kgBW (control positive), group C was given root ethanol extract dosage 200mg / kgBB, group D was given stem ethanol extract dosage 200mg / kgBB and group E was given leaf ethanol extract dosage 200mg / kgBB. The aphrodisiac test was observed on the 31st day with a ratio of male and female rats (1: 2). All parameters tested in the extract group showed significant differences with the normal group. This showed an aphrodisiac effect in all extract groups. The 200 mg / KgBB stem extract group reduced latent rates and intromission mounts as well as increased copulation rates, showing a marked increase in the number of intromissions, reduced ejaculatory latency and inter-intromission interval, and increased ejaculation frequency. which was not significant in the X-gra group (positive control) (p

scholarly journals Functional food promotes digestive functions and healthy growth of animals nurtured in confinement

2020 ◽  
Vol 44 (1) ◽  
pp. 76-88
Author(s):  
A. Ajibola ◽  
K. H. Erlwanger
Keyword(s):  
Tap Water ◽  
Nutrient Utilization ◽  
Female Rats ◽  
Male Rats ◽  
Control Group ◽  
High Dose ◽  
Control Infant ◽  
Male And Female ◽  
Male And Female Rats ◽  
Healthy Growth

In the study, the growth pattern, morphometric and morphological changes in the gastrointestinal tract of growing male and female Sprague-Dawley rats fed crude honey (CH)-supplemented diets as measures of nutrient utilization, digestive functions and healthy growth were investigated. Thirty-five suckling (7-day old male and female) rats were fed CH either as low (10mLkg-1 BW) or high (20mLkg-1 BW) dose daily via stomach tube for 14 days, while the control group was gavaged with distilled water. Rats were kept with their dams to nurse freely between gavages. On weaning, CH was mixed with commercial rat feed as low (20%) or high, 50% (volume/weight, v/w), while 20% (v/w) tap water was added to the control diet. The feed intake of honey-fed male rats and control (infant: 6 – 10g; adult:31 – 38g) was significantly higher (p < 0.05) than their high dose-diet mates (infant: 5 – 8g; adult: 31 – 38g). All the rats were killed at 13 weeks old for gross and microscopic measurements of the abdominal viscera. Grossly, there were no significant differences (p ≥ 0.05) in the relative lengths (%BW) and weight: length ratio (g cm-1 ) of the small and large intestines in both sexes. Crude honey increased the absolute and relative weights of the caecum (1.73 ± 0.05g; 0.38 ± 0.02%BW) and pancreas (2.52 ± 0.11g; 0.55 ± 0.03%BW), with significant influence (p<0.05) in the male rats. In addition, dietary inclusion of CH at low dose enhanced intestinal villi growth in height (84.0 ± 4.0µm) and width (25.2 ± 1.5µm). Dietary supplementation with crude honey also enhanced body weight gain of male rats (495.52 ± 8.98g) and females (242.52 ± 6.87g), improved abdominal organs' functional size: liver (10.92 ± 0.32g; 2.72 ± 0.13%BW); spleen (1.25 ± 0.06g; 0.27 ± 0.02%BW), devoid of pathological changes, as shown by liver histomorphology (1.2 ± 0.3) and normal hepatocellular architecture thereby conferring nutritional and health benefits on animals nurtured in confinement.

In vitro and in vivo Assessment of Silver Nanoparticles Against Clostridium botulinum Type A Botulinum

2019 ◽  
Vol 16 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Mohammad Aminianfar ◽  
Siavash Parvardeh ◽  
Mohsen Soleimani
Keyword(s):  
Silver Nanoparticles ◽  
Botulinum Toxin ◽  
Clostridium Botulinum ◽  
Lethal Dose ◽  
Type A ◽  
Positive Control ◽  
Negative Control ◽  
Laboratory Animals ◽  
Control Group ◽  
Nano Silver

Background: Clostridium botulinum causes botulism, a serious paralytic illness that results from the ingestion of a botulinum toxin. Because silver nanoparticle products exhibit strong antimicrobial activity, applications for silver nanoparticles in healthcare have expanded. Therefore, the objective of the current study was to assess a therapeutic strategy for the treatment of botulism toxicity using silver nanoparticles. Methods: A preliminary test was conducted using doses that produce illness in laboratory animals to determine the absolute lethal dose (LD100) of botulinum toxin type A (BoNT/A) in mice. Next, the test animals were divided into six groups containing six mice each. Groups I, II and III were the negative control (botulinum toxin only), positive control-1 (nano-silver only) and positive control-2 (no treatment), respectively. The remaining groups were allocated to the toxin that was supplemented with three nano-silver treatments. Results: The mortality rates of mice caused by BoNT/A significantly reduced in the treatment groups with different doses and injection intervals of nano-silver when compared to the negative control group. BoNT/A toxicity induced by intraperitoneal injection of the toxin of Clostridium botulinum causes rapid death while when coupled with nano-osilver results in delayed death in mice. Conclusion: These results, while open to future improvement, represent a preliminary step towards the satisfactory control of BoNT/A with the use of silver nanoparticles for human protection against this bioterrorism threat. Further study in this area can elucidate the underlying mechanism for detoxifying BoNT/A by silver nanoparticles.

In Vitro and In Vivo Neutralizing Activity of Uvaria chamae Leaves Fractions on the Venom of Naja nigricollis in Albino Rat and Bovine Blood

2020 ◽  
Vol 14 (4) ◽  
pp. 295-311
Author(s):  
Ada Gabriel ◽  
Mamman Mohammed ◽  
Mohammed G. Magaji ◽  
Yusuf P. Ofemile ◽  
Ameh P. Matthew ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Neglected Tropical Diseases ◽  
Lethal Dose ◽  
Positive Control ◽  
Haemolytic Activity ◽  
Cytotoxic Activities ◽  
Albino Rat ◽  
Aqueous Residue

Background: Snakebite envenomation is a global priority ranked top among other neglected tropical diseases. There is a folkloric claim that Uvaria chamae is beneficial for the management of snakebite and wounds in African ethnobotanical surveys. Besides, there are many registered patents asserting the health benefits of U. chamae. Objective: This study aimed to investigate U. chamae’s potentials and identify candidates for the development of tools for the treatment and management of N. nigricollis envenomation. Methods: Freshly collected U. chamae leaves were air-dried, powdered, and extracted in methanol. The median lethal dose of the extract was determined and further fractionated with n-hexane, n-butanol and ethyl acetate. Each fraction was tested for neutralizing effect against venom-induced haemolytic, fibrinolytic, hemorrhagic, and cytotoxic activities. Results: U. chamae fractions significantly (p<0.05) neutralized the haemolytic activity of N. nigricollis venom in n-butanol; 31.40%, n-hexane; 33%, aqueous residue; 39.60% and ethyl acetate; 40.70% at the concentration of 100mg/ml of each fraction against 10mg/ml of the snake venom when compared to the positive control. The fibrinolytic activity of N. nigricollis venom was significantly (p<0.05) neutralized in n-hexane at 73.88%, n-butanol; 72.22% and aqueous residue; 72.22% by the fractions of U. chamae. In addition, haemorrhagic activity of N. nigricollis venom was significantly (p<0.05) neutralized by U. chamae fractions at the concentrations of 100mg/ml, 200mg/ml and 400mg/ml except for n-butanol and aqueous residues at 400 mg/ml. Conclusion: U. chamae leaves fractions possess a high level of protection against N. nigricollis venoms-induced lethality and thus validate the pharmacological rationale for its usage in the management of N. nigricollis envenomation.

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