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Taxus brevifolia, the Pacific yew or western yew, is a species of tree in the yew family Taxaceae native to the Pacific Northwest of North America. It is a small evergreen conifer , thriving in moisture and otherwise tending to take the form of a shrub .
Chemicals extracted from clippings of Taxus brevifolia (Pacific yew) have been used as the basis for two chemotherapy drugs, docetaxel and paclitaxel. [8] Euphorbia peplus. Contains ingenol mebutate (Picato) which is used to treat skin cancer [9] Maytenus ovatus
Docetaxel is of the chemotherapy drug class; taxane, and is a semi-synthetic analogue of paclitaxel (Taxol), an extract from the bark of the rare Pacific yew tree, Taxus brevifolia. [16]
A Pacific yew tree, known as a strong conifer whose bark has been used to treat cancer, fell in December after 410 years in Washington state.
Paclitaxel was originally derived from the Pacific yew tree. [4] [5] Taxanes are difficult to synthesize because of their numerous chiral centres—taxol has 11 of these. Recently, the presence of taxanes in the shells and leaves of Corylus avellana (the common hazel plant) has been reported. [6] [7]
Taxanes are natural and semi-synthetic drugs. The first drug of their class, paclitaxel, was originally extracted from Taxus brevifolia, the Pacific yew. Now this drug and another in this class, docetaxel, are produced semi-synthetically from a chemical found in the bark of another yew tree, Taxus baccata. [56]
These included yew trees, whose bark is used for the cancer drug paclitaxel. [29] [30] However, methods were developed to produce the drug semi-synthetically from the leaves of cultivated European yews. Those can be sustainably harvested without the need to further endanger wild populations, and the Pacific yew is no longer at risk. [31]
Paclitaxel was isolated from the bark of the Pacific yew tree Taxus brevifolia Nutt. (Taxaceae). Later it was also isolated from hazelnut trees (leaves, twigs, and nuts) and the fungi living on these trees but the concentration is only around 10% of the concentration in yew trees. Paclitaxel is also known as Taxol and Onxol to be an anti-cancer ...