Tian Men Dong
StarAsparagus cochinchinensis (Lour.) Merr.
☯ TCM Properties
Nourishes Yin and Moistens Dryness; Clears Lung Heat and Generates Fluids; Clears Lung Heat and Drains Lung Fire; Moistens the Intestines and Unblocks the Bowels; Nourishes Kidney Yin
Traditional Chinese Uses
Tian Men Dong (asparagus tuber) is a cold, bitter-sweet herb that deeply nourishes Kidney and Lung Yin and clears deficiency Heat. It is used for the Yin deficiency patterns of dry cough with scanty phlegm or blood-streaked sputum, dry throat and mouth, thirst, and bone-steaming fever. Its deep Yin-nourishing action on the Kidney makes it suitable for the most severe cases of Kidney and Lung Yin depletion, where both the root and the branch of deficiency heat require simultaneous nourishment and cooling.
Western Herbalism Properties
Used In Formulas (2)
Botanical Description
Asparagus cochinchinensis (Lour.) Merr. (Asparagaceae) is a herbaceous to semi-woody perennial native to China, Korea, Japan, and Southeast Asia, with slender twining or scrambling stems up to 1-2 m bearing curved spines and fascicles of needle-like cladodes (modified stem segments) that function as leaves. The true leaves are reduced to scales. From a fibrous crown it produces numerous fleshy spindle-shaped tuberous roots 4-10 cm long with translucent yellowish flesh. These tubers are dug in autumn or winter, scalded, peeled, and sun-dried. In TCM, Tian Men Dong is sweet and bitter in flavor and very cold in nature, entering the Lung and Kidney channels; it nourishes Yin, moistens dryness, clears Lung heat, and generates fluids, especially for dry cough and thirst.
Active Constituents
Steroidal saponins (asparagosides, aspacochiosides, furostanol and spirostanol glycosides)
Steroidal saponinsConcentration: Major bioactive fraction
The principal active class of the tuberous root, responsible for anti-inflammatory, antitussive, antioxidant and cytotoxic (antitumor) activities. Several steroidal saponins show cytotoxic effects against tumor cell lines in vitro.
Polysaccharides (fructan/inulin-type and heteropolysaccharides)
PolysaccharidesConcentration: High
Water-soluble polysaccharides contribute to the moistening, immune-enhancing, antioxidant, anti-aging and blood-glucose-lowering effects attributed to the root.
beta-Sitosterol and daucosterol
PhytosterolsConcentration: Minor
Common phytosterols contributing to anti-inflammatory and lipid-modulating activity.
Smilagenin and diosgenin (sapogenins)
Steroidal sapogeninsConcentration: Minor (aglycone fraction)
Aglycone cores released on hydrolysis of the steroidal saponins; associated with anti-inflammatory and cytotoxic properties.
Lignans and C21-steroids
Lignans / pregnane steroidsConcentration: Minor
Anti-neuroinflammatory constituents isolated from the root; contribute to neuroprotective and anti-inflammatory activity.
Amino acids (19 identified, incl. asparagine)
Amino acidsConcentration: Notable
A rich complement of free amino acids contributing to the yin-nourishing, fluid-generating character of the herb.
⚠ Drug Interactions
Oral antidiabetic drugs / insulin
Root polysaccharides have shown blood-glucose-lowering activity in preclinical models, so concurrent use could theoretically add to the hypoglycemic effect of antidiabetic agents.
Clinical note: Human evidence is lacking; monitor blood glucose if combined with diabetes medications.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9-30g | Daily | — | — | — |
Preparation Methods
Decoction (Tang)
Parts: Tuberous root (steamed and dried)
Usually 6-15 g of the cleaned, pith-removed and often steamed root is decocted in water. The heart/pith is traditionally removed to reduce the tendency to cause loose stools.
Sugar-preserved / candied root (Tang tian dong)
Parts: Tuberous root
The root can be boiled and preserved in honey or sugar as a moistening confection for dry cough and constipation from fluid deficiency.
Medicinal paste / decocted extract
Parts: Tuberous root
Concentrated aqueous extracts are combined into yin-nourishing pastes and syrups to moisten the Lung and Kidney and generate fluids.
Clinical Studies
Saponin-enriched extract of Asparagus cochinchinensis alleviates airway inflammation and remodeling in ovalbumin-induced asthma model
A saponin-enriched extract of Asparagus cochinchinensis reduced airway inflammation, mucus overproduction and remodeling in an ovalbumin-induced murine asthma model, supporting the traditional use of the root for cough and lung disorders.
Historical Texts
Shennong Ben Cao Jing (Divine Farmer's Materia Medica)
Han dynasty, c. 200 CEBen Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1578 CEReferences
- Wang M, Wang S, Hu W, Wang Z, Yang B, Kuang H. Asparagus cochinchinensis: A review of its botany, traditional uses, phytochemistry, pharmacology, and applications . Frontiers in Pharmacology (2022) [DOI]
- Sung JE, Lee HA, Kim JE, et al.. Saponin-enriched extract of Asparagus cochinchinensis alleviates airway inflammation and remodeling in ovalbumin-induced asthma model . International Journal of Molecular Medicine (2017) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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