Taxus wallichiana
Zucc.,
commonly
known as the Himalayan Yew, is currently experiencing endangerment
due to excessive harvesting and sluggish growth resulting from the
extraction of paclitaxel, a crucial plant-derived medication employed
in the treatment of cancer.
T. wallichiana
contains
various phytochemicals, including paclitaxel, a diterpenoid that has
been utilized as an anticancer medication. In order to extract paclitaxel
while maintaining the species’ survival, it is difficult to
determine the most effective plant parts. We determined the diterpenoid
paclitaxel content using modern analytical methods such as high-performance
thin-layer chromatography-densitometric analysis. Furthermore, toxicological
evaluations were carried out and tissue-specific antioxidant activity
was statistically analyzed using 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic
acid (ABTS), ferric reducing antioxidant power (FRAP), Folin–Ciocâlteu
(FC), and 2,2-diphenyl-β-picrylhydrazyl (DPPH) assays. The results
of our study offer significant contributions to the identification
of optimal plant components for the extraction of paclitaxel. This
information is crucial in the conservation of
T. wallichiana
and in mitigating the difficulties associated with its threatened
classification. The present investigation makes a valuable contribution
toward the advancement of sustainable methodologies in the manufacturing
of paclitaxel, as well as the preservation of
T. wallichiana
for posterity. Bark exhibited the maximum paclitaxel yield at a
content of 29162.3 μg/g dry weight. The accuracy of the method
has been validated in accordance with the guidelines outlined by the
International Council for Harmonisation (ICH). The current investigation
evaluated the potential cytotoxic and genotoxic effects of the aqueous
extracts on meristematic cells from the roots of
Allium
cepa
. The extracts obtained from the bark exhibited
noteworthy cytotoxic and mitotic characteristics. The current investigation
holds potential significance for the pharmaceutical sector in terms
of identifying superior chemotypes of
T. wallichiana
that produce high levels of paclitaxel. Conducting a toxicological
assessment on various tissues of
T. wallichiana
chemotypes through employment of the
Allium cepa
test would facilitate the identification of any potential genotoxic
characteristics. The present study aimed to investigate four distinct
assays, namely, DPPH, ABTS, FRAP, and FC, for the evaluation of the
antioxidant potential of diverse
T. wallichiana
plant extracts and standard substances. The findings suggest that
FRAP and ABTS exhibit a strong correlation. In general, the entirety
of the tissue extract exhibited commendable antioxidant capacity,
thereby rendering it a promising contender for diverse applications.