19 research outputs found
Hydroethanolic Extract from Bridelia atroviridis Müll. Arg. Bark Improves Haematological and Biochemical Parameters in Nicotinamide-/Streptozotocin-Induced Diabetic Rats
No full textNoussi Djouwoug C, Ngueguim FT, Kamkumo Gounoue R, et al. Hydroethanolic Extract from Bridelia atroviridis Müll. Arg. Bark Improves Haematological and Biochemical Parameters in Nicotinamide-/Streptozotocin-Induced Diabetic Rats. Evidence-Based Complementary and Alternative Medicine. 2020;2020: 3160834.Bridelia atroviridis Müll. Arg. (B. atroviridis) is a plant used in Cameroonian traditional medicine to manage diabetes. The effects of hydroethanolic barks extract from B. atroviridis were evaluated on diabetes disorders including hematology, inflammatory, and oxidative stress parameters. The in vitro antioxidant capacity of the hydroethanolic bark extract (70 : 30) was evaluated. Nicotinamide-/streptozotocin-induced diabetic rats were daily treated with the B. atroviridis extract for fifteen days. Glycemia were evaluated every 5 days, insulin sensibility test was performed, and haematological, inflammatory, and oxidative stress parameters were analysed. Histomorphometry of the pancreas was realized. The extract was able to scavenge free radicals in vitro and decrease significantly the blood glucose levels. The treatment resulted in a significant alleviation of insulin resistance, anemia, leukocytopenia, and thrombocytopenia observed in untreated diabetic rats. The extract significantly decreased proinflammatory cytokines TNF-α, IL-1β, and IL-10. The rate of reduced glutathione was increased in the pancreas, whereas the catalase activity and nitrite concentration were decreased. Diabetic control showed a reduced size of Langerhans islet, whereas the size of islets was large in treated groups. The hydroethanolic extract of B. atroviridis was able to improve glycemia and alleviate haematological and inflammatory parameters disorders observed in diabetic conditions, probably due to its antidiabetic, anti-inflammatory, and antioxidant capacities
Osteoprotective Effects and In Silico Profiling of Parinari curatellifolia Planch. Ex Benth. (Chrysobalanaceae) Extract on Acute Plasmodium berghei-Compromised Rat Bone
No full textJouonzo J, Kamkumo RG, Ngueguim FT, et al. Osteoprotective Effects and In Silico Profiling of Parinari curatellifolia Planch. Ex Benth. (Chrysobalanaceae) Extract on Acute Plasmodium berghei-Compromised Rat Bone. Chemistry & Biodiversity . 2025.Parinari curatellifolia leaves and stem bark are traditionally used, to treat both malaria and bone disorders. This work aimed at investigating the osteoformative effects of the P. curatellifolia aqueous leaves and bark mixture extract on malaria-induced bone alterations. The in vitro antiplasmodial activity of the extract was assessed on Plasmodium falciparum 3D7 and Dd2. The phytochemical characterization of the extract and its fractions was carried out using LC-MS technique. The in vivo study was evaluated using Plasmodium berghei ANKA-induced malaria and bone disorders. Parasitemia was monitored, and hematological, biochemical, immunological, and histopathological parameters were assessed. The docking study was performed on Pf20S, TyrRS, MyD88, and RANKL using the Molecular Operating Environment 14. The extract exhibited in vitro antiplasmodial activity on P. falciparum 3D7 and Dd2 strains. The LC-MS analysis of the extract and fractions revealed several peaks, of which 12 were characterized. The extract reduced parasitemia (p < 0.001), improved hematological parameters, corrected malaria-induced bone damage by increasing (p < 0.001) bone osteocalcin, TGF-beta 1, ALP activity, mineralization, as well as reversing Plasmodium-induced inflammation. Likewise, the identified compounds exhibited strong inhibitory binding potential. These findings support the ability of the extract to correct malaria-related bone disorders by acting as an antiplasmodial, osteoprotective, anti-inflammatory, and antioxidant agent
Sclerocarya birrea (Anacardiaceae) stem-bark extract corrects glycaemia in diabetic rats and acts on beta-cells by enhancing glucose-stimulated insulin secretion
No full textSclerocarya birrea is a plant widely used as traditional medication for the treatment of diabetes in sub-Saharan regions. However, the mechanism of action is unknown and only hypoglycaemic effects of S. birrea extract (SBE) in diabetic rats have been reported to date. Here, we tested aqueous extracts of S. birrea on insulin-secreting INS-1E cells and isolated rat islets. Following 24 h of treatment at 5 microg/ml, the extract markedly potentiated glucose-stimulated insulin secretion. Neither basal insulin release nor non-nutrient stimulation was affected. The potentiation of the secretory response at stimulatory glucose appeared after 12 h of treatment. No acute effects were observed and, at the effective concentration, SBE was safe regarding cell integrity and differentiation. The mechanism of action of the SBE was related to glucose metabolism as both ATP generation and glucose oxidation were enhanced following the 24-h treatment. In streptozotocin-induced diabetic rats, SBE administration corrected glycaemia and restored plasma insulin levels after 2 weeks of treatment. These data show direct action of S. birrea on insulin-secreting cells and favour further delineation for use of the plant in the management of diabetes
Protective Role of Terminalia superba Ethyl Acetate Extract Against Oxidative Stress in Type 2 Diabetes
No full textIn vitro and in vivo antiplasmodial activity of hydroethanolic bark extract of Bridelia atroviridis mull. Arg. (Euphorbiaceae) and lc-ms-based phytochemical analysis
No full textDjouwoug CN, Gounoue RK, Ngueguim FT, et al. In vitro and in vivo antiplasmodial activity of hydroethanolic bark extract of Bridelia atroviridis mull. Arg. (Euphorbiaceae) and lc-ms-based phytochemical analysis. JOURNAL OF ETHNOPHARMACOLOGY. 2021;266: 113424.Ethnopharmacological relevance: Malaria is a life-threatening health problem worldwide and treatment remains a major challenge. Natural products from medicinal plants are credible sources for better anti-malarial drugs. Aim of the study: This study aimed at assessing the in vitro and in vivo antiplasmodial activities of the hydroethanolic extract of Bridelia atroviridis bark. Materials and methods: The phytochemical characterization of Bridelia atroviridis extract was carried out by High Performance Liquid Chromatography-Mass spectrometry (HPLC-MS). The cytotoxicity test on Vero cells was carried out using the resazurin-based assay while the in vitro antiplasmodial activity was determined on Plasmodium falciparum (Dd2 strain, chloroquine resistant) using the SYBR green I-based fluorescence assay. The in vivo assay was performed on Plasmodium berghei-infected rats daily treated for 5 days with distilled water (10 mL/kg) for malaria control, 25 mg/kg of chloroquine sulfate for positive control and 50, 100 and 200 mg/kg of B. atroviridis extract for the three test groups. Parasitaemia was daily monitored using 10% giemsa-staining thin blood smears. At the end of the treatment, animals were sacrificed, blood was collected for hematological and biochemical analysis while organs were removed for biochemical and histopathological analyses. Results: The HPLC-MS analysis data of B. atroviridis revealed the presence of bridelionoside D, isomyricitrin, corilagin, myricetin and 5 others compounds not yet identified. Bridelia atroviridis exhibited good in vitro antiplasmodial activity with the IC50 evaluated at 8.08 mu g/mL and low cytotoxicity with the median cytotoxic concentration (CC50) higher than 100 mu g/mL. B. atroviridis extract significantly reduced the parasitemia (p < 0.05) with an effective dose-50 (ED-50) of 89 mg/kg. B. atroviridis also prevented anemia, leukocytosis and liver and kidneys impairment by decrease of transaminases, ALP, creatinine, uric acid, and triglycerides concentrations. As well, B. atroviridis extract decreased some pro-inflammatory cytokines (TNF-alpha, IL-1 beta, IL-6) levels and significantly improved the anti-inflammatory status (P < 0.01) of infected animals marked by a decrease of IL-10 concentration. These results were further confirmed by the improved of antioxidant status and the quasi-normal microarchitecture of the liver, kidneys and spleen in test groups. Overall, the hydroethanolic bark extract of Bridelia atroviridis demonstrated antimalarial property and justified its use in traditional medicine to manage malaria disease
In vivo and in vitro anti-natriuretic activity of twigs fraction from Dorstenia picta: a possible mechanism.
No full textThe present study examine the in vivo effects of Dorstenia Picta (D. picta) on urinary volume and sodium excretion in streptozotocin-induced diabetic rats, and determine a possible mechanism by which the extract increased sodium transport in A6 cells monolayers. Administration of the plant extract at the dose of 150 mg/kg during two weeks decreased urinary volume and sodium excretion. In vitro study showed that, apical application of the plant extract at the dose of 100 µg/mL does not significantly increase sodium transport, whereas basolateral administration provoked a significant (P<0.05) increase of sodium transport in a concentration-dependent manner. The plant extract increases the sodium transport by 69.93% versus 55.41% for insulin and 78.44% for adenosine after 30 min. Preincubation of A6 cells monolayers with inhibitor of all adenosine receptors completely suppressed adenosine and plant extract stimulated sodium transport. Interesting is that, the A1 inhibitor receptor (DPCPX), at 100 nM completely abolished the effect of plant extract. The plant extract increased sodium transport by increase PI3-kinase activity and this effect is strongly inhibited by LY-294002. These data also suggest that, the twigs methanol fraction from Dorstenia picta increase sodium transport via PI 3-kinase pathway and requires A1 adenosine receptor.info:eu-repo/semantics/publishe
Oxidised palm oil and sucrose induced hyperglycemia in normal rats: effects of Sclerocarya birrea stem barks aqueous extract
No full textHibiscus noldea (Malvaceae) Aqueous Extract Prevents Insulin Resistance and Protects Pancreatic Islets From Dexamethasone Damages in Rat.
No full textHibiscus noldea leaves-stems aqueous extract is used in Cameroonian traditional medecine to manage diabetes. To investigate the preventive effect of Hibiscus noldea aqueous extract on dexamethasone-induced insulin resistance, the animals received one of the following treatments: distilled water (10 mL/kg), metformine (200 mg/kg), or H. noldea (100 or 200 mg/kg) concomitantly with dexamethasone (0.5 mg/kg, ip) for ten days. Body weight was evaluated daily and blood glucose levels were measured. At the end of experiment, insulin sensitivity test was performed and lipid profile, transaminases Aspartate amino transferase, Alanin amino transferase, malondialdehyde, superoxide dismutase, catalase, and reduced glutathione were evaluated. Histological analysis of the liver was investigated to estimate glycogen content using Periodic Acid Schiff coloration and histomorphometry of pancreatic islets area was performed. The administration of dexamethasone during ten days induced body weight loss, hyperglycaemia, insulinresistance, an imbalance in lipid profile, an increase in transaminases and oxidative stress. Dexamethasone treatment also induced an increase in the pancreatic islets area and depletion in the levels of hepatic glycogen. Concomitant administration of dexamethasone and the aqueous plant extract prevented the rise in blood glucose levels, reduced insulinresistance, improved lipid profile and oxidative status. The aqueous extract of H. noldea prevented the use of glycogen storage and the increase in pancreatic islet area in dose dependent manner. Conclusion: The stem leaves aqueous extract from Hibiscus noldea have the ability to reduce insulinresistance via its antihyperglycaemic, hypolipidemic and antioxidant activities. These results justify the use of this extract in the management of diabetic state
Aqueous extract of Peperomia pellucida (L.) HBK accelerates fracture healing in Wistar rats
No full textAqueous extract of Peperomia pellucida (L.) HBK accelerates fracture healing in Wistar rats
No full textAbstract Background Peperomia pellucida (L.) HBK is consumed as vegetable and used in Cameroonian traditional medicine for the management of diseases and for fracture healing. Therefore the aim of this study was to evaluate the effects of the aqueous whole plant extract of Peperomia pellucida on fracture healing in female Wistar rats. Methods A drill hole injury was created by inserting a drill bit inthe diaphysis of the femur. The aqueous extract of the whole plant of Peperomia pellucida was administered orally at the doses of 100, 200 and 400 mg/kg to adult female Wistar rats. The vehicle (distilled water) was given to the control. Besides these rats, one group of rats without fracture received the extract (400 mg/kg). After 14 days of treatment, the rats were sacrificed under anesthesia and the effects of the extract were evaluated on body weight, the relative weights of organs (femurs, uteri and ovaries) and on hematology. Bone (calcium, phosphorus, alkaline phosphatase) and serum biochemical parameters (calcium, phosphorus, alkaline phosphatase) were also evaluated. Radiological and histological tests were carried out on the femurs. The mineral content of the plant extract was also investigated. Results The extract induced an increase in body weight at high dose and in WBCs count at low doses. Aqueous extract from Peperomia pellucida increased bone calcium at lowest dose but maintained this parameter at normal range at high dose in fractured rat. Alkaline phophatase and phosphorus concentrations reduced significantly (p < 0.01) at the dose of 400 mg/kg as compared to fractured rats. Moreover, radiological tests revealed a dose dependent formation of callus at the level of the fracture gap, confirmed by the formation of a highly dense and compact fibrocartilagenous callus. The mineral content of the plant extract revealed the presence of calcium, phosphorus, magnesium, sodium and potassium. Conclusion The aqueous extract of P. pellucida accelerates bone healing due partly to the mineral content of the extract. These results confirm its traditional use in the treatment of bone fractures
