RESUMO
Background: Hyperlipidemia is one of the major risk factors for coronary heart disease and stroke. Triphala, a polyherbal Ayurvedic formulation made from dried fruits of Haritaki (Terminalia chebula Retz.), Bibhitaki (Terminalia bellirica Roxb.), and Amalaki (Phyllanthus emblica Gaertn.) has been suggested to be useful in mitigating hyperlipidemia. In the Ayurveda texts, depending on the patient's condition and body type, Triphala is formulated and used in one of the two combination (1:1:1 and 1:2:4 of individual constituents) forms. Aims: The present study aimed at evaluating the efficacy of two combinations (1:1:1 and 1:2:4 of individual constituents) of Triphala against high fat diet induced-hyperlipidemia in rats. Materials and method: Hyperlipidemia was induced in Spraque-Dawley albino rats by feeding them with high fat diet. The animals were concomitantly administered with graded dose of one of the two combination (combination of Haritaki, Bibhitaki, and Amalaki in ratio of 1:1:1 or 1:2:4, respectively) of Triphala (250, 500, or 1000 mg/kg body wt.) or atorvastatin. The animals were sacrificed on day 22 and serum was processed for lipid profile and the liver for lipid peroxidation. The statistical analysis was performed by the mean analysis of variance followed by Dunnet's test. Results: The results indicated that when compared to placebo group, levels of serum total cholesterol, and triglyceride were significantly lower, while high-density lipoprotein cholesterol increased in both the Triphala combination and atorvastatin groups. Of the two groups of Triphala, the formulation having 1:2:4 ratio was better than the 1:1:1. The group having highest drug dose (1000 mg/kg body wt.) of 1:2:4 formulation was better than atorvastatin in rectifying high fat diet-induced dyslipidemia and the atherogenic index was equal to that of atorvastatin. Conclusions: The results of the study indicate that of the two Triphala formulations, the 1:2:4 ratio was better than the 1:1:1 ratio for anti-hyper-lipidemic effects.
RESUMO
Superparamagnetic Fe3O4 nanoparticles are appealing materials for heat activated killing of cancer cells. Here, we report a novel method to enhance the heat activated killing of cancer cells under an AC magnetic field (AMF) by introducing a polyaniline impregnated shell onto the surface of Fe3O4 nanoparticles. These polyaniline shell cross-linked magnetic nanoparticles (PSMN) were prepared by in situ polymerization of aniline hydrochloride on the surface of carboxyl PEGylated Fe3O4 nanoparticles. XRD and TEM analyses revealed the formation of single phase inverse spinel Fe3O4 nanoparticles of a size of about 10 nm. The successful growth of the polyaniline shell on the surface of carboxyl PEGylated magnetic nanoparticles (CPMN) is evident from FTIR spectra, DLS, TGA, zeta-potential and magnetic measurements. Both CPMN and PSMN show good colloidal stability, superparamagnetic behavior at room temperature and excellent heating efficacy under AMF. It has been observed that the heating efficacy of PSMN under AMF was slightly reduced as compared to that of CPMN. The enhanced toxicity of PSMN to cancer cells under AMF suggests their strong potential for magnetic hyperthermia. Furthermore, PSMN shows high loading affinity for an anticancer drug (doxorubicin), its sustained release and substantial internalization in tumor cells.