Posted by admin on Aug 31, 2020 in |
Centella asiatica (CA; family Apiaceae) is extensively used in traditional medicine. A regular supply of this plant is required by the herbal drug industry. Hence, the cultivation of this plant is required. The emphasis of the available cultivation practices is on biomass yield. The activity of the plant, however, depends on the amount of bioactive constituents. The production of these secondary metabolites is influenced by biotic as well as abiotic factors. This study was carried out to determine the abiotic factors that enhance the production of secondary metabolites in CA. CA plants were grown in two seasons (i.e., season 1: August to December and season 2: February to June) on different soil types (Clay loamy, Red, Black), and various stresses were applied to the plants. At the end of each season, plant yield, extract yield, asiatic acid content, antioxidant, and acetylcholinesterase inhibition activities were determined. Asiatic acid content was determined by an HPLC method. The results show the varied response of CA plants to seasons, soil, and stresses. CA...
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Posted by admin on Dec 31, 2019 in |
Chromolaena odorata was extracted by ethanol/water. Centella asiatica was extracted by methanol. A cream containing C. odorata and C. asiatica extracts was formulated and evaluated for its physicochemical properties and stability. C. odorata and C. asiatica were extracted and their respective active compounds scutellarein tetramethyl ether and asiaticoside were determined as bioactive compounds using HPLC. Creams were prepared using 5% C. odorata and 1% C. asiatica extracts and tested for their appearance, pH, and viscosity. Stability was evaluated under accelerated conditions using six hot/cold cycles and after long-term storage at 30 °C/75% RH for 3 months. The content of scutellarein tetramethyl ether in C. odorata extract was 0.13 ± 0.02% w/w and the content of asiaticoside in the C. asiatica extract was 0.35 ± 0.04% w/w. Contents of scutellarein tetramethyl ether and asiaticoside in the cream formulation were 98.25 ± 0.43% and 102.16 ± 0.22%, respectively. The cream formulations containing the extracts had a good appearance and were non-greasy and easily applied, with a pH value of 5.4 ±...
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Posted by admin on Sep 30, 2019 in |
In this study, the in-vivo toxicity of Centella asiatica & Evolvulus alsinoides were evaluated by acute and sub-acute toxicity assays according to the guidelines of OECD 423 & 407 respectively. For LD50 evaluation, a single dose of hydro-alcoholic extracts of both plants was orally administered to Swiss albino mice at doses of 200, 400, 800, 1600 and 2000 mg/kg. Then the animals were observed for 72 h. For acute toxicity evaluation, a single dose of hydro-alcoholic extracts of both plants was orally administered to mice at doses of 300, 600, 1200 and 2000 mg/kg. Then, the animals were observed for 14 days. In the sub-acute study, the extracts were orally administered to mice for 28 days at doses of 300, 600, 1200, and 2000 mg/kg. To assess the toxicological effects, animals were closely observed on general behavior, clinical signs of toxicity, body weight, food, and water intake. At the end of the study, it was performed biochemical and hematological evaluations, as well as histopathological analysis from the following organs: brain, heart, liver, and...
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Posted by admin on Mar 31, 2019 in |
Centella asiatica L. Urban (family: Umbelliferae) contains several active triterpenoids which have been reported to induce type I collagen which decreases substantially in photoaged skin. Centella asiatica extract is highly soluble in water but have low absorption into the skin. To overcome this, water in oil nanoemulsion loaded with Centella asiatica extract have been formulated, optimized and evaluated as the potential delivery system for treating photoaging. Nanoemulsions were formulated by the oil phase titration method and optimized by constructing pseudo-ternary phase diagrams. The prepared nanoemulsions were subjected to thermodynamic stability testing. Those that passed these tests were characterized for droplet size, polydispersity index, zeta potential and droplet morphology by Cryo-SEM. The prepared nanoemulsions were in nanometric range (optimized batch: 140.5 nm) with uniform size distribution (PDI: 0.086) and good physical stability (zeta potential: -33.9 mV). Topical permeation of Centella asiatica loaded nanoemulsion through porcine abdominal skin was estimated using the Franz diffusion cell. A significant increase in permeability parameters was observed in nanoemulsion formulations (P<0.05) as compared to an...
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Posted by admin on Feb 28, 2018 in |
Centella asiatica (CA) is a reputed medicinal plant that has been shown to have pharmacological effect on skin wound healing. The aim of the study was done to assess the effects of aqueous extract of CA on human dermal fibroblasts in an in vitro model of wound healing. Dermal fibroblasts were cultured with or without supplementation of aqueous extract of CA. Viability and proliferation of the fibroblasts cells were determined by MTT assay and cell cycle were analyzed by flowcytometry. In-vitro re-epithelization was assessed by scratch assay and migration rate was evaluated quantitatively by image analyzer. Gene expression of type I collagen, type III collagen, fibronectin and SMAA2 were studied via real-time RT-PCR. Supplementation with the aqueous extract of CA inhibited the fibroblasts’ proliferation significantly (p<0.05) at high concentration. Moreover, it also inhibited fibroblasts’ migration across the denuded area significantly (p<0.05) at a concentration of 194.15 μg/mL (IC50) when it was compared to the control. The gene expression of type I collagen, type III collagen, fibronectin and SMAA2 decreased...
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