RESUMO
PURPOSE: Obesity and overweight are metabolic disorders associated with oxidative stress, and risk factors for many chronic diseases. We sought to investigate the effects of Metaswitch dietary supplement on weight gain and associated acute metabolic alterations in a high-fat diet-induced overweight rat model. METHODS: Female Sprague Dawley (SD) rats were put into 6 groups. Control groups were fed normal (NCD) or high-fat diet (HFD). Treatment groups on HFD receieved 3 different daily doses of Metaswitch for 3 weeks. Another group on HFD received Slimrite® (phenylpropanolamine), a standard drug. Rats on HFD also received cyproheptadine to stimulate appetite. Food consumption and anthropometric parameters were determined weekly. Serum lipids, glucose level, hepatic lipid peroxidation, and antioxidant activity were used to assess overweight in rats. RESULTS: Food intake remained relatively constant among groups. Rats on HFD had significantly increased body weight compared to rats fed NCD. Metaswitch significantly prevented weight gain; this effect was greater or similar to rats administered Slimrite, but was not dose-dependant. No significant changes occurred in the levels of serum lipids and glucose among the groups. However, serum triglyceride (TG) was significantly increased. The TG/HDL-C ratio revealed significant metabolic alterations which was prevented by Metaswitch. Catalase activity was significantly decreased in the HFD untreated group but was restored in Metaswitch-treated groups. CONCLUSIONS: A 3-week HFD regimen with cyproheptadine supplementation in female SD rats resulted in a significant increase in body weight and acute metabolic alterations. The aforementioned changes were found to have been prevented with the administration of Metaswitch.
Assuntos
Dieta Hiperlipídica , Doenças não Transmissíveis , Animais , Antioxidantes/metabolismo , Antioxidantes/farmacologia , Peso Corporal , Ciproeptadina/farmacologia , Dieta Hiperlipídica/efeitos adversos , Suplementos Nutricionais , Feminino , Glucose/farmacologia , Sobrepeso/tratamento farmacológico , Estresse Oxidativo , Ratos , Ratos Sprague-Dawley , Aumento de PesoRESUMO
ETHNOPHARMACOLOGICAL RELEVANCE: Some local communities in Cote d'Ivoire use the mushroom Termitomyces schimperi combined with kaolin (TSK) to manage various cancers in patients. However, there is a paucity of data on toxicity, mutagenicity and trace metal constituent of TSK. AIM OF THE STUDY: We sought to investigate the acute and sub-chronic toxicities, mutagenic potential, and trace metal constituents of TSK. MATERIALS AND METHODS: To assess acute toxicity, single doses (1000, 3000 and 5000 mg/kg) of aqueous extract of TSK were administrated per os to Sprague Dawley (SD) rats on Day 1. The rats were then monitored for 13 consecutive days. Sub-chronic toxicity was evaluated by daily administration of 200 and 500 mg/kg of the extract per os for 90 consecutive days. SD rats used as control received distilled water. Signs of toxicity, changes in body weight and mortality were monitored. After the aforementioned monitoring processes, rats were sacrificed and blood collected for full blood count and biochemistry analysis. Animal organs were also collected for histopathological examination. The mutagenic potential of the aqueous extract of TSK (10000 µg/mL) on TA98 Salmonella typhimurium was estimated. Additionally, energy-dispersive X-ray fluorescence (ED-XRF) method was employed to determine trace metal constituents of TSK. RESULTS: Single-dose administration of 5000 mg/kg of TSK did not cause any death in the SD rats; thus, LD50 was above 5000 mg/kg. Administration of 1000 and 3000 mg/kg of the aqueous extract of TSK did not cause any significant change in behaviour and body weight of SD rats during the 14-day monitoring period. However, the mean corpuscular volume and the mean corpuscular haemoglobin concentration increased significantly (p < 0.01) among rats administered 1000 and 3000 mg/kg of TSK. There was a significant increase (p < 0.0001) in alanine transaminase levels in rats administered 1000 and 3000 mg/kg of TSK extract compared with control. Conversely, there was a significant decrease (p=0.0122) in serum creatine level among rats administered 1000 and 3000 mg/kg of TSK extract compared with control. After 14 days, there were minimal changes with isolated organs of TSK-treated and control rats. Furthermore, 90-day treatment with extract of TSK caused no significant change in parameters assessed. TSK induced frameshift gene mutation in S. typhimurium before (p < 0.05) and after metabolic activation (p < 0.001). Elemental analysis of TSK revealed the presence of toxic (aluminium) or potentially toxic (silver, rabidium, titanium and zirconium) elements. CONCLUSIONS: The aqueous extract of TSK showed no toxicity (acute and sub-chronic) at doses tested. These findings are consistent with the absence of heavy metals (i.e., cadmium) and potentially toxic elements (i.e., uranium) in TSK samples analysed. TSK showed some level of mutagenic potential. Further mutagenic and chronic toxicity studies on TSK are required.
Assuntos
Caulim/química , Caulim/toxicidade , Neoplasias/tratamento farmacológico , Extratos Vegetais/química , Extratos Vegetais/toxicidade , Termitomyces/química , Animais , Peso Corporal/efeitos dos fármacos , Côte d'Ivoire , Coração/efeitos dos fármacos , Rim/efeitos dos fármacos , Rim/patologia , Dose Letal Mediana , Fígado/efeitos dos fármacos , Fígado/patologia , Pulmão/efeitos dos fármacos , Pulmão/patologia , Masculino , Medicinas Tradicionais Africanas/métodos , Testes de Mutagenicidade , Miocárdio/patologia , Tamanho do Órgão/efeitos dos fármacos , Ratos Sprague-Dawley , Salmonella typhimurium/efeitos dos fármacos , Baço/efeitos dos fármacos , Baço/patologia , Fatores de Tempo , Testes de Toxicidade Subcrônica , Oligoelementos/análiseRESUMO
BACKGROUND: Nymphaea lotus L. (N. lotus) is an aquatic plant with anecdotal reports suggesting its use in the traditional management of cancer. However, there is a paucity of data on the antioxidant, anti-inflammatory and cytotoxic properties of N. lotus in relation to its phytochemical and elemental contents. This study aimed at determining the antioxidant, anti-inflammatory and cytotoxic properties of the hydro-ethanolic extract of N. lotus leaves (NLE), and its phenolic, flavonoid and elemental constituents. METHODS: The antioxidant property of NLE was determined using total phenolic and flavonoid, DPPH radical scavenging, lipid peroxidation and reducing power assays. The anti-inflammatory activity of NLE (100-250-500 mg/kg), diclofenac and hydrocortisone (positive controls) were determined by paw oedema and skin prick tests in Sprague Dawley rats. Also, the erythrocyte sedimentation rate (ESR) was determined by Westergren method. The macro/micro-elements content was determined by the XRF method. The cytotoxic property of NLE was determined by the MTT assay, on two cancer cell lines (MCF-7 and Jurkat) and compared to a normal cell line (Chang liver). Inhibitory concentrations were determined as IC50 values (±SEM). RESULTS: The extract had appreciable levels of phenolic and flavonoids compounds and was two-fold more potent in scavenging DPPH radicals than Butylated hydroxytoluene (BHT). However, NLE was three- and six-fold less potent than ascorbic acid and BHT, respectively, in reducing Fe3+ to Fe2+. The extract was six-fold more potent than gallic acid in inhibiting lipid peroxidation. The extract caused a dose-dependent decrease in rat paw oedema sizes, comparable to diclofenac, and a significant decrease in wheel diameters and ESR. The elemental analysis revealed relevant concentrations of Mg2+, P2+, S2+, K2+, Mn+, Fe+, Cu+, Zn+ and Cd+. The extract exhibited cytotoxic activity on both MCF-7 (IC50 = 155.00 µg/ml) and Jurkat (IC50 = 87.29 µg/ml), with higher selectivity for Jurkat cell line. Interestingly, the extract showed low cytotoxicity to the normal Chang liver cell line (IC50 = 204.20 µg/ml). CONCLUSION: N. lotus leaves extract exhibited high antioxidant, anti-inflammatory and cancer-cell-specific cytotoxic properties. These aforementioned activities could be attributed to its phenolic, flavonoid and elemental constituents.
Assuntos
Anti-Inflamatórios não Esteroides/isolamento & purificação , Antineoplásicos Fitogênicos/farmacologia , Antioxidantes/isolamento & purificação , Nymphaea/química , Extratos Vegetais/farmacologia , Animais , Anti-Inflamatórios não Esteroides/farmacologia , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Antioxidantes/química , Antioxidantes/farmacologia , Sedimentação Sanguínea , Proliferação de Células/efeitos dos fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Flavonoides/análise , Flavonoides/farmacologia , Humanos , Células Jurkat , Células MCF-7 , Masculino , Fenóis/análise , Fenóis/farmacologia , Extratos Vegetais/química , Extratos Vegetais/isolamento & purificação , Ratos , Ratos Sprague-DawleyRESUMO
ETHNOPHARMACOLOGICAL RELEVANCE: Majority of people living in Ghana and many other developing countries rely on traditional medicinal plants for their primary healthcare. These plants are used either alone or in combination to manage a wide range of ailments. However, most of these plants have not been investigated for their mutagenic effects. AIM OF THE STUDY: This study, therefore aimed at evaluating the mutagenic activity of the most frequently used medicinal plants amongst Ghanaians living within the Accra metropolis, Ghana. MATERIALS AND METHODS: Validated questionnaires were administered to 53 herbalists and herbal medicines dealers in the Makola, Madina and Nima communities. Plants that were identified as being frequently used were investigated for their mutagenicity using the Ames test. RESULTS: A total of 110 medicinal plants belonging to 53 families were identified as most frequently used plants in the study sites. These are used to treat various ailments including gastric ulcer, fever, malaria, male impotence, diabetes, typhoid, high blood pressure and candidiasis. Thirteen samples (52%) showed moderate to high mutagenicity in the TA 100 bacterial strain before and after metabolism with rat liver enzyme. CONCLUSIONS: The study showed that over half of the frequently used medicinal plants showed moderate to high mutagenicity before and after metabolism at the concentration of a 100⯵g/mL. This may have implications for the safety of those who use them to manage diseases. These findings will suggest the need for an in-depth study of the mutagenic potentials of plants commonly used by indigenous people and more especially for those exhibiting high mutagenicity in this study.
Assuntos
Etnofarmacologia , Medicinas Tradicionais Africanas/efeitos adversos , Mutagênese , Extratos Vegetais/efeitos adversos , Plantas Medicinais/efeitos adversos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Qualidade de Produtos para o Consumidor , Feminino , Gana , Humanos , Masculino , Pessoa de Meia-Idade , Testes de Mutagenicidade , Medição de Risco , Salmonella/efeitos dos fármacos , Salmonella/genética , Inquéritos e Questionários , Adulto JovemRESUMO
BACKGROUND: Synedrella nodiflora is used by traditional healers in Ghana for the management of epilepsy and pain. The hydro-ethanolic extract of the whole plant has demonstrated antinociceptive effect in various animal models of pain. This study investigated the potential benefit of the hydro-ethanolic extract in a rat model of paclitaxel-induced neuropathic pain. METHODS: Neuropathy was induced in rats by a continuous intraperitoneal administration of paclitaxel (2 mg/kg) for 5 days. Baseline latencies to thermal pain were recorded before the first injection of paclitaxel and during the 5 day induction period. Following the induction, the rats in designated treatment group were treated with the hydro-ethanolic extract (100, 300 and 1000 mg/kg, p.o) or pregabalin (10, 30 and 100 mg/kg) or vehicle (distilled water) and their responses to thermal hyperalgesia measured every 30 for a total period of 3 h. RESULTS: There was a significant difference between the baseline reaction latency and what was observed on the 5th day of the induction of neuropathy. Two days after the induction of neuropathy, the extract and pregabalin significantly and dose-dependently produced antinociceptive effect during the 3-h test period. CONCLUSION: The hydro-ethanolic extract of the whole plant of Synedrella nodiflora possess analgesic effect in paclitaxel-induced neuropathy in rats.
Assuntos
Analgésicos/uso terapêutico , Asteraceae/química , Etanol/química , Neuralgia/induzido quimicamente , Neuralgia/tratamento farmacológico , Paclitaxel/efeitos adversos , Extratos Vegetais/uso terapêutico , Animais , Hiperalgesia/induzido quimicamente , Hiperalgesia/complicações , Hiperalgesia/tratamento farmacológico , Injeções Intraperitoneais , Neuralgia/complicações , Extratos Vegetais/farmacologia , Pregabalina/uso terapêutico , Ratos Sprague-DawleyRESUMO
BACKGROUND: Unsweetened natural cocoa powder (UNCP), prepared after removal of the cocoa butter, is a common beverage in Ghana. It possesses antimalarial prophylactic property and has a beneficial effect on blood components. AIM: The aim of this study was to determine whether regular dietary supplement of UNCP mitigates high-dose (HD) artemether-lumefantrine (A-L)-induced hematological disorders and to determine the effect on nitric oxide (NO) levels. MATERIALS AND METHODS: Adult male guinea pigs (300 g - 350 g) were randomly divided into 5 groups of 6 guinea pigs each. Among the 5 groups, 3 groups were treated with UNCP (300, 900, and 1500 mg/kg body weight) for 14 days. A-L (75 mg/kg) was administered from the 12th to 14th day. One of the remaining 2 groups received distilled water only, i.e., vehicle control group (VCG) while the other received 75 mg/kg A-L only, i.e., negative control group (NCG). Blood samples from all groups were obtained by cardiac puncture (day 15) followed by hematological and NO analysis. RESULTS: A-L reduced white blood cells (WBC) by 31.87%, lymphocyte count by 45.99%, hemoglobin by 11.72%, hematocrit by 18.56%, and platelet count by 33.08% in the NCG. Administration of various doses of UNCP increased WBC and lymphocyte count (P > 0.05) compared to the NCG. UNCP and A-L combination caused an increase in NO levels when compared to the VCG. CONCLUSION: Regular consumption of UNCP by guinea pigs increases plasma NO and restores some hematological disorders induced by a 3-day HD A-L administration.
RESUMO
OBJECTIVE: Integrative medicine refers to ongoing efforts to combine the best of conventional and evidence-based complementary therapies. While this effort for collaboration is increasing, traditional complementary and alternative medicine (TM-CAM) remains poorly integrated into the current healthcare system of Ghana. At present, it is not clear if practitioners of mainstream medicine favor integrative medicine. The present study, therefore, sought to explore the perceptions of conventional healthcare professionals on integrative medicine. METHODS: A qualitative design composed of semi-structured interviews was conducted with 23 conventional healthcare professionals comprising pharmacists, physicians, nurses and dieticians from two quasi-government hospitals in Accra, Ghana. RESULTS: Participants' knowledge of TM-CAM was low, and although they perceived alternative medicine as important to current conventional healthcare in Ghana, they expressed anxieties about the potential negative effects of the use of TM-CAM. This paradox was found to account for the low levels of use among these professionals, as well as the low level of recommendation to their patients. The practitioners surveyed recommended that alternative medicine could be integrated into mainstream allopathic healthcare in Ghana through improving knowledge, training as well as addressing concerns of safety and efficacy. These findings are discussed under the themes: the knowledge gap, the paradox of TM-CAM, experience of use and prescription, and guided integration. We did not observe any differences in views among the participants. CONCLUSION: The conventional healthcare professionals were ready to accept the idea of integrative medicine based on knowledge of widespread use and the potential role of TM-CAM products and practices in improving healthcare delivery in the country. However, to achieve an institutional integration, practitioners' understanding of TM-CAM must be improved, with specific attention to issues of safety, regulation and evidence-based practice of TM-CAM products and services in Ghana.
Assuntos
Atitude do Pessoal de Saúde , Terapias Complementares , Conhecimentos, Atitudes e Prática em Saúde , Medicina Integrativa , Medicina Tradicional , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Percepção , Pesquisa QualitativaRESUMO
BACKGROUND: Unsweetened natural cocoa has antimalarial properties. Unsweetened natural cocoa powder (UNCP), obtained as a result of the removal of cocoa butter from a cocoa bean protects against malaria episodes. Cocoa powder, which is prepared after removal of the cocoa butter, contains about 1.9 % theobromine and 0.21 % caffeine. Concomitant consumption of cocoa and artemether/lumefantrine (A/L) is a common practice in Ghana, West Africa. This study seeks to determine the elemental composition of UNCP and its protective effect on the heart and kidney against (A/L) administration. METHODS: Energy dispersive x-ray fluorescence spectroscopy was used to detect the quality and quantity of the elemental composition in UNCP. Thereafter, 30 nonmalarious male guinea pigs were divided into five groups of six animals each. One group was administered with 75 mg/kg body weight A/L only and another group distilled water (control group). The rest received 300 mg/kg, 900 mg/kg and 1500 mg/kg body weight UNCP for 14 days orally and A/L for the last 3 days (ie day 11 to day 14). Biochemical and histopathological examinations were carried out after euthanisation of the animals. RESULTS: A total of thirty-eight (38) micro and macro elements were detected with the ED-XRF. Macro elements like sodium (Na), magnesium (Mg), aluminium (Al), phosphorus (P), chlorine (Cl), potassium (K), calcium (Ca), manganese (Mn) and iron (Fe) and micro elements like chromium (Cr), copper (Cu), zinc (Zn), arsenic (As), and lead (Pb) were identified and evaluated. Biochemical analysis revealed increases in HDL levels (p>0.05) while there were decreases in LDL levels (p>0.05), creatine kinase and AST levels (P<0.05) in animals that received UNCP compared to A/L only administered group. Urea levels reduced significantly by 53 % (p<0.05) in group that received 1500 mg/kg UNCP. Histopathological examinations of the heart and kidney buttressed the protective effects of cocoa administration. CONCLUSION: The percentage of recommended daily allowance of UNCP for chromium is 3750 % for men and 5250 % for women while % RDA for copper corresponds to 103.6 % in both sexes. UNCP proved to possess cardioprotective and renoprotective potential during artemether-lumefantrine administration.
Assuntos
Antimaláricos/efeitos adversos , Artemisininas/efeitos adversos , Cacau/química , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/dietoterapia , Etanolaminas/efeitos adversos , Fluorenos/efeitos adversos , Preparações de Plantas/uso terapêutico , Animais , Antimaláricos/química , Combinação Arteméter e Lumefantrina , Artemisininas/química , Creatina Quinase/sangue , Combinação de Medicamentos , Etanolaminas/química , Fluorenos/química , Cobaias , Rim/efeitos dos fármacos , Lipídeos/sangue , Masculino , Preparações de Plantas/administração & dosagemRESUMO
BACKGROUND: The leaves of Pergularia daemia Forsk (family Asclepidaceae) provide alternative plant-based treatments for the management of diabetes mellitus and diarrhoea in both humans and indigenous poultry species like the Guinea fowls (Numida meleagris). However, no scientific investigations to validate its usefulness in Ghana have been established. This study therefore sought to investigate the anti-hyperglycaemic activity of the 70â% ethanolic extract of P. daemia using streptozotocin (STZ)-induced diabetic male Sprague-Dawley rats. Additionally, the antioxidant and antimicrobial properties of the extract were investigated. METHODS: The total phenolic content, total flavonoids content, radical scavenging activity and reducing power assays were estimated using Folin-Ciocalteu method, aluminium chloride colorimetric assay, Fe3+ reduction assay and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assays, respectively. RESULTS: The results showed that P. daemia extract caused anti-hyperglycaemic activity in the STZ-induced rats at doses of 30, 60 and 90âmg/kg body weight with significant reduction in blood glucose levels. The phytosterols, saponins, phenols, alkaloids, tannins and triterpenes found in the extract may be responsible for the observed anti-hyperglycaemia and antioxidant activities. The extract also showed antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis. CONCLUSIONS: These findings justify the folkloric use of P. daemia as an anti-diabetic and antibacterial agents for susceptible species.
Assuntos
Antibacterianos/farmacologia , Antioxidantes/farmacologia , Apocynaceae/química , Bactérias/efeitos dos fármacos , Diabetes Mellitus Experimental/sangue , Hipoglicemiantes/farmacologia , Extratos Vegetais/farmacologia , Animais , Antibacterianos/análise , Antibacterianos/uso terapêutico , Antioxidantes/uso terapêutico , Compostos de Bifenilo/metabolismo , Glicemia/metabolismo , Diabetes Mellitus Experimental/tratamento farmacológico , Flavonoides/análise , Flavonoides/farmacologia , Flavonoides/uso terapêutico , Gana , Hipoglicemiantes/análise , Hipoglicemiantes/uso terapêutico , Masculino , Fenóis/análise , Fenóis/farmacologia , Fenóis/uso terapêutico , Fitoterapia , Picratos/metabolismo , Extratos Vegetais/química , Extratos Vegetais/uso terapêutico , Folhas de Planta/química , Ratos Sprague-DawleyRESUMO
We developed and validated a new analytical method for the simultaneous quantification of artemether and lumefantrine in fixed-dose tablets and powders for reconstitution into pediatric suspensions (PSs). The method showed linearity (r(2) > 0.9947), precision (coefficient of variation < 2%), accuracy (deviation of mean from actual concentrations < 4%), and specificity (peak purities > 99%). The validated method was used to analyze 24 batches of fixed-dose tablets and PSs of artemether and lumefantrine. Of the samples, 23 were obtained using convenience sampling of commonly available brands within Accra in Ghana and one was obtained from Aarhus University Hospital. In all, 83.3% (confidence interval: 80-120%) passed for both artemether and lumefantrine contents, 16.7% failed by the U.S. Pharmacopoeia standards, 8.3% failed for one content, and 8.3% failed for both contents. All four products (16.7%) that failed were PSs, and two (8.3%) showed higher levels of artemether than prescribed (222% and 756%).