Posted by admin on Sep 1, 2012 in |
The colon is the terminal part of the GIT which has gained in recent years as a potential site for delivery of various novel therapeutic drugs, i.e. peptides. However, colon is rich in microflora which can be used to target the drug release in the colon. Colon is a site where both local and systemic drug delivery can take place. Local delivery allows the topical treatment of inflammatory bowel disease. If drug can be targeted directly into the colon, treatment can become more effective and side effects can be minimized. These systemic side effects can be minimized by primary approaches for CDDS (Colon specific drug delivery) namely prodrugs, pH and time dependent systems and microbially triggered system which gained limited success and have limitations as compared with recently new CDDS namely pressure controlled colon delivery capsules (PCDCS), CODESTM (Novel colon targeted delivery system) osmotic controlled drug delivery system, Pulsincap system, time clock system, chronotropic system. This review is to understand the pharmaceutical approaches to colon targeted drug delivery systems...
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Posted by admin on Sep 1, 2012 in |
The fruits of Garcinia pedunculata Roxb. ex Buch.-Ham., G. xanthochymus Hook. f. and G. morella (Gaertn.) Desr. collected from Sonitpur district of Assam, India were evaluated for the antioxidant potential and total phenolic content. The methanolic extract of these fruits were subjected to DPPH (2,2-Diphenyl-1-picrylhydrazyl) assay for determining the free radical inhibition property and Folin Ciocalteu’s method for quantification of total phenolic content (TPC). G. pedunculata Roxb. ex Buch.-Ham. showed highest antioxidant potential with IC50 value 47.03±13.48 µg/ml. All species contains low phenolic content ranging between 1.83±0.62 to 88.2±2.19 mg GAE/g dry extract. No significant correlation between total phenolic content and antioxidant potential was...
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Posted by admin on Sep 1, 2012 in |
High performance liquid chromatography is one of the most accurate methods widely used for the quantitative as well as qualitative analysis of drug product and is used for determining drug product stability. Stability indicating HPLC methods are used to separate various drug related impurities that are formed during the synthesis or manufacture of drug product. This article discusses the strategies and issues regarding the development of stability indicating HPLC system for drug substance. A number of key chromatographic factors were evaluated in order to optimize the detection of all potentially relevant degradants. The method should be carefully examined for its ability to distinguish the primary drug components from the impurities.New chemical entities and drug products must undergo forced degradation studies which would be helpful in developing and demonstrating the specificity of such stability indicating methods.At every stage of drug development practical recommendations are provided which will help to avoid...
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Posted by admin on Sep 1, 2012 in |
This article reviews, connected the gap between the folkloric use of Solanum nigrum and the results of evidence based experiments. Although Solanum nigrum is a rich source of one of plants most dreaded toxins solanine, it has appreciably monstrated its potential as a reservoir of antioxidants having hepatoprotective, anti-tumor, cytostatic, anti-convulsant, anti-ulcerogenic and anti-inflammatory.effects. The review encompasses in-vitro, in vivo and clinical studies done on Solanum nigrum, while examining.whether or not correct scientific measures have been taken in generating experimental evidences for its traditional uses. This review would afford research scientist to know how much is known and what is left undone in the investigation of Solanum nigrum. The compounds considered in this revieware flavonoids and other phenolics, alkaloids (especially indole terpenoid and purine alkaloids), essential oils and other terpenoids, cannabinoids, lucosinolates and isothiocyanates, and compounds having human hormone activity. The review concludes with a discussion of the possible evolutionary mechanisms that have led to the evolution of UV-B regulation of secondary metabolite accumulation. Many Ayurveda philosophers and healers...
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Posted by admin on Sep 1, 2012 in |
Pollution have a serious impact on human health and environment. The incidences of various diseases are becoming prominent with the increase in rate of population. The diseases mainly include respiratory disorders, cardiovascular disorders, throat inflammation, skin infections etc. In the present study, widely claimed crude drug Dashamularishta, have been screened for their antibacterial activity against Shigella flexneri, Staphylococcus aureus, Salmonella typhi, Pseudomonas aeruginosa, Klebsiella pneumonia, Proteus vulgaris, Enterobacter aerogenes, Aspergillus niger, Candida albicans, Trichophyton rubrum. Phytochemical screening and antimicrobial activity of petroleum ether, chloroform, benzene, ethyl acetate and ethanol and distilled water extracts of Dashamularishta have been screened. Phytochemical screening recorded positive results for reducing sugar in all six extracts, terpinoids present in pet. ether, ethyl acetate, methanol and distilled water extract, Flavonoids present in ethyl acetate and distilled water, Tannin present in chloroform and methanol, saponins present in pet. ether, benzene, ethyl acetate and distilled water extract. The results were expressed in terms of the diameter of the inhibition zone: The maximum efficacy of ethyl acetate extract was...
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