Posted by admin on Apr 1, 2010 in |
For cancer therapy, microtubule network is an attractive cellular target. Main component of cell cycle is mitotic stage, particularly when the mitotic spindle separates the replicated chromosomes. The rapid microtubule dynamics also play a critical role for activities of the bipolar spindle. Microtubule targeting drugs act at binding site either by destabilizing or hyper-stabilizing microtubules. It results mitotic arrest at the prometaphase or metaphase to anaphase transition, then it leads to subsequent apoptotic cell death. Taxanes and Vinca alkaloids have been validated by the successful use for a wide variety of human cancer. Clinical development of colchicines for cancer therapy has not been successful till now because they produce toxic effect in normal tissues. Semi-synthetic analogue of taxane, docetaxal is more potent than paclitaxel against cancer cell proliferation. It is now used for the treatment of breast, prostate and non small cell lung cancer. Successful use of paclitaxel and docetaxel in cancer therapy has inspired the new microtubule targeting agents that bind to taxane site, like Epothilones, discodermolide, eleuthelobin,...
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Posted by admin on Apr 1, 2010 in |
Dendrimers are a new class of polymeric materials. They are highly branched, monodisperse macromolecules. Structural Advantages allow dendrimers to play an important role in the fields of nanotechnology, pharmaceutical and medicinal chemistry. As a result of their unique behaviour dendrimers are suitable for a wide range of biomedical and industrial applications. The paper gives a brief review of dendrimers’ physico-chemical properties and their possible use in various areas of research, technology and...
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Posted by admin on Apr 1, 2010 in |
More than 50% of pharmaceutical products are orally administered for several Reasons and undesirable taste is one of the important formulation problems that is Encountered with such oral products. Taste of a pharmaceutical product is an important parameter governing compliance. Hence taste masking of oral Pharmaceuticals has become important tool to improve patient compliance and the Quality of treatment especially in paediatrics. Different methods have been suggested for Masking of taste of bitter drugs, which includes, coating of drug particles with inert agents, taste masking by formation of inclusion complexes, molecular complexes of drug with other chemicals, solid dispersion system, microencapsulation, multiple emulsions, using liposome’s, Prodrugs and mass extrusion method but ion exchange resin is one of most extensively Used method to overcome this problem. Ion-exchange resins (IER) have received considerable attention from pharmaceutical scientists because of their versatile properties as drug-delivery vehicles. In the past few years, IER have been extensively studied in the development of novel drug-delivery systems (DDSs) and other biomedical applications. Also Recently the New...
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Posted by admin on Mar 1, 2010 in |
Nerium oleander L. is an important medicinal material in Chinese folk medicine. In early times it is assumed that all parts of the oleander plant are poisonous to humans, animals and certain insects but now a day’s numbers of pharmacological activities are determined by different scientists. Its main active constituents are polysaccharides, cardenolides, glycosides, and triterpenoids. The important pharmacological activities are antinociceptive, anti-inflammatory, antibacterial, anticancer and CNS depressant activity. This paper explains the evidence-based information regarding the phytochemistry and pharmacological activity of this plant....
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Posted by admin on Mar 1, 2010 in |
Molecules greater than 500 Da normally do not cross the skin. This prevents epicutaneous delivery of the high molecular weight therapeutics as well as non-invasive transcutaneous immunisation. Transfersomes are a form of elastic or deformable vesicle, which were first introduced in the early 1990s. Elasticity is generated by incorporation of an edge activator in the lipid bilayer structure. The original composition of these vesicles was soya phosphatidyl choline incorporating sodium cholate and a small concentration of ethanol. Transfersomes are applied in a non-occluded method to the skin and have been shown to permeate through the stratum corneum lipid lamellar regions as a result of the hydration or osmotic force in the skin. They have been used as drug carriers for a range of small molecules, peptides, proteins and vaccines, both in vitro and in vivo. Transfersomes penetrate through the stratum corneum and the underlying viable skin into the blood circulation in intact form. However, this has not been substantiated by other research groups who have extensively probed the mechanism of penetration...
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