Tripterygium regelii

Tripterygium regelii has been used locally in parts of Northeast China as a decoction of the roots or root bark for painful joints and associated stiffness (Choi and Lee, 2000; Han and Bae, 2010). In Korea, pounded fresh leaves applied as a poultice have long been employed for contusions and rheumatic aches, while the same preparation has been used for snakebite in some districts (Lee et al., 1979; Shin and Kim, 2013). Among Mongolia’s communities, leaf infusions have been taken for colds and fever, and decoctions of the stem or root have been used for joint and muscle complaints (Badgaa et al., 1999; Tsagaan, 2005).

A commonly described preparation is a root‑bark tincture. Combine roughly 20 g of dried root bark with 45% ethanol to a total of 100 mL (≈1:5 w/v), seal and shake daily for 2–4 weeks, then strain. For short courses (≤6 weeks), a typical adult regimen is 10–20 drops in water, once or twice daily. Because the plant contains diterpenoid epoxides and tripterine (celastrol), which can be hepatotoxic, it is best used under professional guidance and should be avoided in pregnancy, during breastfeeding, and in children; monitor liver function if used long‑term.

The plant’s activity is commonly attributed to sesquiterpene alkaloids (wilforgine, wilfortrine) and tripterine (celastrol), both robustly documented as major constituents of T. regelii, alongside celangulins and related sesquiterpene polyesters (Xia et al., 2011). In modern practice, standardized extracts are prepared for clinical research on rheumatoid arthritis and related inflammatory conditions, and raw dried root and tincture preparations are available from specialty Chinese materia medica suppliers. Contemporary investigations continue to explore sesquiterpene alkaloids and celastrol’s mechanisms in arthritis models.

Common products:
The species is cultivated as an ornamental climbing vine for gardens, parks, and urban greening. It is sold in nurseries as potted plants, rooted cuttings, or young specimens and is employed on trellises, arbors, fences, and slopes to provide privacy screening and year‑round foliage. The product form is the whole living plant (including stems, leaves, and roots) intended for horticultural planting. Because of its twining growth habit and tolerance to partial shade, it is frequently used in mixed plantings for shade structures and for erosion control on gently sloping sites.

Industrial and craft applications:
Fresh or dried leaves and stems are used as source material for phytochemical research. Extracts are prepared using standard organic solvents (e.g., methanol) and are analyzed by chromatographic and spectroscopic techniques (LC‑MS, NMR) to identify sesquiterpene lactones and related metabolites characteristic of the Celastraceae. The plant is also employed in molecular systematics; DNA barcodes (ITS and plastid regions) and transcriptome datasets generated from T. regelii are deposited in public sequence repositories (e.g., NCBI GenBank) and are used in phylogenetic reconstruction within the family. Additionally, the flexible woody stems can be fashioned into small wickerwork or craft models, although commercial exploitation is limited.

Properties relevant to use:
T. regelii is a woody, twining vine reaching several metres in length, with opposite, trifoliate leaves (three leaflets each) and a relatively small‑diameter stem. The species tolerates partial shade, retains evergreen foliage, and is tolerant of pruning, allowing it to be shaped into dense hedges or espaliered forms. Stems exhibit moderate density, making them suitable for limited craft work but not for large‑scale timber production. The leaves contain characteristic sesquiterpene lactones (e.g., triptolide‑type compounds) that are of interest to research laboratories for chemical profiling; these compounds are not utilized in commercial product formulation.

Sustainability and sourcing:
Commercial propagation is performed by vegetative cuttings in nurseries, reducing pressure on wild populations. The ornamental trade sources plants from cultivated stock, and the species is generally not harvested from natural habitats. International trade of potted ornamentals is subject to national plant health regulations (e.g., USDA‑APHIS import permits, EU plant passport requirements), ensuring compliance with phytosanitary standards. Because the species is cultivated rather than wild‑collected, its environmental impact is limited to the area of horticultural production.

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