Adenophora: A Comprehensive Reference
1. Identity and Botanical Classification
Genus and Accepted Species
Adenophora is a genus of flowering plants in the family Campanulaceae, informally known as "ladybells."
There are 68 species currently accepted within the genus Adenophora.
Adenophora triphylla is a medicinal plant belonging to the family Campanulaceae and has long been used as medicine and food.
Also known as Japanese ladybell, it is one of the accepted species of Adenophora, distributed mainly over the Korean Peninsula, Japan, and China.
The two species of primary medicinal and commercial relevance are:
- Adenophora stricta Miq. — the primary source of the traditional Chinese drug Radix Adenophorae (Nan Shashen).
- Adenophora tetraphylla (Thunb.) Fisch. — recognized as equivalent or synonymous with A. triphylla in several pharmacopoeial contexts.
Radix Adenophorae (Shashen), a traditional Chinese medicine commonly used as an antitussive and expectorant, is derived from roots of Adenophora stricta Miq. and Adenophora tetraphylla (Thunb.) Fisch.
Adenophorae Radix (also known as "Nan shashen" in China) is derived from the root of Adenophora tetraphylla (Thunb.) Fisch. or Adenophora stricta Miq. in the Chinese Pharmacopoeia. A. tetraphylla (Thunb.) Fisch., also known as Adenophora triphylla, is a medicinal and edible plant within the Campanulaceae family.
Plant Morphology
Adenophora triphylla is an erect, perennial herb growing to 100 centimetres (39 in) in height. It has a white and thickened taproot, shaped like a carrot, 7–16 centimetres (2.8–6.3 in) by 1.5–1.8 centimetres (0.59–0.71 in) in diameter. Stems are white pilose with alternately arranged leaves. It has oval, almost round, serrated leaves growing to 10 centimetres (3.9 in), white, sharply pointed, and pilose.
Names and Synonyms
The drug is known by several names across different traditions:
- Nan Shashen (南沙参) — the primary Chinese medicine name for A. stricta/A. tetraphylla root.
- Sa-sam — the Korean name for the dried root of A. triphylla.
- Saiyousyajin — the Japanese name used in traditional contexts.
- Radix Adenophorae — the Latin pharmacopoeial designation.
The dried roots of A. triphylla are called "sa-sam" in Korea and are eaten roasted like deodeok or balloon flower roots, or cooked in pickles, seasoning, stir-fried and other dishes.
The roots are used in traditional medicine to treat chronic bronchitis and whooping cough, and also as anti-inflammatory and anti-tussive agents in Japan, where the plant is known as "Saiyousyajin."
Adulteration and Authenticity
Twelve species and varieties of Adenophora and Glehnia could act as substitutes or adulterants of Radix Adenophorae on commercial markets in South East Asia, and roots of Adenophora hunanensis Nannf. and Glehnia littoralis F. Schmidt ex Miq. are the most common examples.
The authentic identification of dried roots of A. stricta and A. tetraphylla is difficult on the basis of appearance and morphology alone.
Common Preparations and Dosage Forms
Adenophora root is prepared and consumed in several forms:
- Dried root (decoction/water extract): Dried A. triphylla is traditionally ingested in the form of hydrothermal extracts, which are prepared by boiling the root in water. This method of preparation is not only aligned with traditional medicinal practices but is also widely used in modern functional food formulations.
- Ethanol extract: Used in numerous preclinical research preparations and increasingly in supplement formulations.
- Roasted, stir-fried, or pickled root: The dried roots of Adenophora triphylla are eaten roasted, stir-fried, or pickled and are also used in traditional medicine.
- Functional food ingredient: Owing to its functional properties, it has attracted attention as an industrial material in the functional food, dietary supplement, and pharmaceutical industries.
2. Traditional and Historical Use
Traditional Chinese Medicine (TCM)
Nan Sha Shen (Radix Adenophorae) is recorded in the Shen Nong Ben Cao Jing (Shen Nong's Herbal Classic). This ancient text represents one of the foundational pharmacopoeias of Chinese medicine and reflects centuries-old use of Adenophora root.
In TCM classification, Radix Adenophorae is considered sweet, slightly bitter, and slightly cold in nature; it enters the lung and stomach meridians. Its traditional functions include nourishing the yin of the lung and stomach, clearing heat of the lung and stomach, tonifying the qi of the spleen and lung, and dispelling phlegm.
It is indicated for dry cough with little phlegm, blood in phlegm, dryness in the throat, and hoarseness due to lung yin deficiency with dryness-heat in the lung. Though it is considered weaker than Bei Sha Shen (Glehnia root) in terms of moistening the lung and clearing lung heat, it can disperse phlegm and tonify lung qi, and it is very indicated for chronic cough due to yin deficiency.
The plant was originally noted as a remedy for lung fever, old coughs, and somnolence in China in 1578, and in Korea in 1613 as a herbal medicine that energizes the lungs.
A related but distinct species distinction is noted historically: up until the 17th century there was no distinction made between Adenophorae radix (nan sha shen) and Glehniae radix (bei sha shen). The two roots came to be recognized as separate drug entities in later Chinese medicine texts, with Nan Sha Shen (Adenophora) and Bei Sha Shen (Glehnia) fulfilling overlapping but not identical therapeutic roles.
Korean Traditional Medicine
The genus Adenophora has long been recognized in traditional Korean medicine for its diverse pharmacological properties, including anti-inflammatory, anti-allergic, and spleen protective effects.
A. triphylla is commonly utilized as an oriental medicinal herb in Korea, China, and Japan for ailments such as bronchitis, cancer, cough, inflammation, and obesity.
The leaves of A. triphylla are incorporated into traditional Korean recipes due to their medicinal properties, while its roots have long been utilized in traditional oriental therapeutics to cure several respiratory disorders, including asthma.
Japanese Traditional Use
Adenophora triphylla var. triphylla (Family: Campanulaceae) is distributed in Japan, Korea, and China. It is locally known as "Saiyousyajin" in Japan and the roots are used in traditional medicine to treat chronic bronchitis and whooping cough, and also as anti-inflammatory and anti-tussive agents.
3. Key Constituents and Active Compounds
The review literature describes the presence of over 130 phytoconstituents, including triterpenoids, polyphenols, flavonoids, and phenylpropanoids, identified from the aerial parts and roots of A. triphylla.
Triterpenoids
Triterpenoids such as triphyllol, methyl adenophorate, β-sitosterol, lupenone, and β-sitosterol glucoside were identified in the methanol extract of A. triphylla var. japonica roots.
Adenophora triphylla, a perennial plant widely used in traditional medicine, produces secondary metabolites like lupenone and β-sitosterol.
Four compounds were isolated from the roots of Adenophora stricta. On the basis of spectrometric analysis and physicochemical constants, they were identified as beta-sitosterol, beta-sitosterol-O-beta-D-glucopyranoside, taraxerone, and octacosanoic acid. Taraxerone and octacosanoic acid were isolated from Adenophora plants for the first time in that study.
Alkaloids
Various alkaloids have been reported in A. triphylla, including α-1-C-ethylfagomine, a 6-C-butyl derivative of 2R,5R-bis(hydroxymethyl)-3R,4R-dihydroxypyrrolidine (DMDP), 1-deoxymannojirimycin, 1-deoxynojirimycin, and 1,4-dideoxy-1,4-imino-D-arabinitol. These polyhydroxylated (iminosugar) alkaloids are of particular pharmacological interest due to their known glycosidase-inhibitory properties.
Flavonoids and Phenolic Compounds
The roots of A. triphylla contain various metabolites and compounds, including lipids, proteins, palmitic acid, amino acids, minerals such as potassium, and vitamins like vitamin C and vitamin E. They also contain phenolic acids, phenylpropanoids, and flavonoids.
The structures of isolated compounds from the aerial parts of A. triphylla var. triphylla were elucidated as luteolin, luteolin 4'-O-β-glucopyranoside, luteolin 7-O-β-glucopyranoside, luteolin 7-O-neohesperidoside, and chlorogenic acid.
Saponins
A. triphylla var. japonica has been reported to contain diverse bioactive constituents, including saponins, flavonoids, and polysaccharides, which have anti-inflammatory, antioxidant, and immunomodulatory activities. A triterpenoid saponin isolated from A. triphylla var. japonica has been specifically investigated for anticancer properties (see below).
Novel Phenylpropanoids and Polyacetylenes
A total of seven compounds, including a new polyacetylene (adenopholin) and a new phenylpropanoid (adenophoroside), were identified. Among the tested phenylpropanoid and polyacetylene compounds, syringin exhibited 32.2% inhibition and adenophoroside showed 38.9% inhibition of α-glucosidase activity, indicating mild inhibitory potential.
Vanillin
Vanillin (4-hydroxy-3-methoxybenzaldehyde) has been isolated from A. triphylla var. japonica and identified as a biologically relevant constituent.
Vanillin is used as a flavoring in foods, beverages, and pharmaceuticals. It possesses various biological effects, such as antioxidant, anti-inflammatory, antibacterial, and anticancer properties.
Lupeol
Lupeol is a major active triterpenoid isolated from Adenophora triphylla var. japonica and has been investigated for its hepatoprotective effects against D-galactosamine (GalN) and lipopolysaccharide (LPS)-induced fulminant hepatic failure.
Polysaccharides
Water-soluble polysaccharides have been extracted from roots of Adenophora tetraphylla. An increasing number of polysaccharides have been extracted from plants, and they have shown a wide range of positive abilities in medicine and healthcare foods, including antitumor, antioxidant, anti-fatigue, anti-inflammatory, anti-anxiety, and anti-aging effects. Moreover, many plant polysaccharides have shown good antidiabetic effects.
Metabolomics Overview
A non-targeted metabolomics approach using LC-Q-TOF-MS was applied to compare the metabolite profiles of A. triphylla root (AR) and its hydrothermal extract (ARE). A total of 23 and 15 compounds were tentatively identified from AR in negative and positive ion modes, while 19 and 9 compounds were detected from ARE, respectively. This work demonstrates that hydrothermal processing (boiling) alters the metabolite composition relative to the raw root, which has implications for understanding the bioactivity of traditionally prepared decoctions.
4. Scientific Evidence by Area of Use
Important framing: Current evidence for A. triphylla is derived primarily from cell-based and animal studies. Clinical studies are needed to validate its therapeutic potential. No large-scale randomized clinical trials have been published specifically for Adenophora as a standalone supplement. The evidence summarized below is largely preclinical unless otherwise stated.
4.1 Respiratory Health: Antitussive, Expectorant, and Lung Protective Effects
This is the most historically established and most scientifically studied area. Adenophora stricta Miq. (Campanulaceae family) is a traditional herb used for relieving cough and phlegm in East Asia.
Allergic Asthma (animal model): One study explored the effects of A. stricta root extract (AsE) in ovalbumin (OVA)-induced allergic asthma and LPS-stimulated macrophages. Administration of 100–400 mg/kg AsE dose-dependently decreased pulmonary congestion and suppressed the reduction of alveolar surface area in OVA-mediated allergic asthma mice. Histopathological analysis of lung tissue and cytological analysis of bronchioalveolar lavage fluid showed that AsE administration significantly attenuated inflammatory cell infiltration into the lungs.
In addition, AsE alleviated OVA-specific immunoglobulin E, interleukin (IL)-4, and IL-5 production, which are essential for OVA-dependent activation of T helper 2 lymphocytes.
In Raw264.7 macrophage cells, AsE significantly blocked nitric oxide, TNF-α, IL-1β, IL-6, and monocyte chemoattractant factor-1 production in response to LPS. Immunoblot assay revealed that AsE inhibited the phosphorylation of c-jun N-terminal kinase, IKKα/β, and p65 in LPS-stimulated cells. Furthermore, 2-furoic acid, 5-hydroxymethylfurfural, and vanillic acid 4-β-D-glucopyranoside in AsE were shown to inhibit the production of proinflammatory mediators.
Particulate Matter-Induced Lung Injury (animal model):
A. stricta is a medicinal herb that has been used for treating respiratory diseases in East Asia. A study investigated the effect of A. stricta root extract (AsE) on PM2.5-induced lung injury in mice. Oral administration of 100–400 mg/kg AsE for 10 days significantly reduced the PM2.5-mediated increase in relative lung weight. AsE dose-dependently decreased congested regions of the lung tissue, prevented apoptosis and matrix degradation, and alleviated mucus stasis induced by PM2.5.
AsE also decreased expression of proinflammatory cytokines and chemokines in lung tissue, and blocked reactive oxygen species (ROS) production and lipid peroxidation through attenuating the PM2.5-dependent reduction of antioxidant defense systems in the lungs.
Murine OVA-Asthma Model (Radix Adenophorae extract):
A further study was performed to investigate the inhibitory effects of Radix Adenophorae extract (RAE) on an ovalbumin-induced asthma murine model, examining the development of pulmonary eosinophilic inflammation and inhibitory effects on T cells by RAE and cyclosporine A (CsA).
The study demonstrated how RAE suppressed development of inflammation and decreased airway damage.
Evidence strength: All respiratory studies are animal models or in vitro; no published human clinical trials evaluating Adenophora specifically for respiratory conditions have been identified in the peer-reviewed literature.
4.2 Anti-Inflammatory and Immunomodulatory Effects
Extracts of bioactive compounds derived from Adenophora species suppress the phosphorylation of MAPKs, thereby attenuating downstream NF-κB activation and reducing the expression of pro-inflammatory cytokines such as TNF-α, IL-6, and IL-1β.
Recently, A. triphylla was shown to possess antibacterial, anticancer, anti-inflammatory, analgesic, and immunomodulatory activities.
Evidence strength: Mechanistic evidence is primarily in vitro (macrophage cell lines) and in vivo (mouse models). No human trials are published.
4.3 Antioxidant Properties
Adenophora triphylla is commonly used in food materials and oriental medicine as an analgesic, anti-inflammatory, and antitussive. In one study, the leaves and roots of A. triphylla were extracted with water and ethanol, respectively, to examine the extracts' in vitro antioxidant activities and total phenolic contents.
The leaf extracts had notable levels of total phenolics and flavonoids and showed high radical and nitrite scavenging activities, as well as inhibition activity against enzymes that induce oxidation.
These results suggest that A. triphylla leaves are a potential ingredient for food supplements and a natural source of antioxidants.
Among isolated phenolic compounds from A. triphylla var. triphylla aerial parts, luteolin, luteolin 7-O-β-glucopyranoside, luteolin 7-O-neohesperidoside, and chlorogenic acid showed potent free radical scavenging activity.
Evidence strength: In vitro only. No human studies on antioxidant biomarkers.
4.4 Anticancer Activity
Gastric cancer (in vitro): A triterpenoid saponin isolated from A. triphylla var. japonica was investigated in gastric cancer cells.
Apoptosis by the saponin treatment was associated with activation of caspases, release of cytochrome c, and increased ratio of Bax/Bcl-2. Autophagy was indicated by LC3-II protein expression.
Non-small cell lung cancer (in vitro):
The hexane fraction of A. triphylla var. japonica root exhibited the most significant growth-inhibitory effects against human non-small cell lung cancer (NSCLC) cell lines H1299, A549, H1975, and H460, with dose-dependent inhibition of proliferation and colony formation. Treatment with the extract induced apoptosis in H1299 and A549 cells through the intrinsic mitochondrial pathway, and the anticancer effects were attributed to the inactivation of Src and STAT3 pathways. Gas chromatography and mass spectrometry analysis revealed the presence of β-sitosterol and lupeol in the hexane fraction.
Anti-angiogenic effects (in vitro/in vivo):
The hexane fraction of A. triphylla var. japonica root extract (HAT) was investigated for anti-angiogenic effects and its influence on the development of erlotinib resistance in human lung cancer cells. HAT significantly reduced the migration, invasion, and tube formation of human umbilical vein endothelial cells (HUVECs). The phosphorylation levels of VEGFR2 and its downstream molecules were decreased via HAT. A docking analysis demonstrated that β-sitosterol and lupeol exhibit a high affinity for binding to VEGFR2.
Co-culture of erlotinib-sensitive PC9 human lung cancer cells with HUVECs induced erlotinib resistance in PC9 cells. However, co-culture with HAT-pretreated HUVECs partially restored the sensitivity of PC9 cells to erlotinib. HAT inhibited the development of erlotinib resistance by attenuating hepatocyte growth factor (HGF) production by endothelial cells.
Evidence strength: All anticancer evidence is from in vitro cell culture studies. No clinical trials. These studies demonstrate the inhibitory potential of A. triphylla extracts against cancer cells; however, the above-mentioned studies evaluated only root extracts.
4.5 Anti-Obesity Effects
High-fat diet mouse model (ethanol extract):
One study investigated the anti-obesity effect of Adenophora triphylla root ethanol extract (ATREE). C57BL/6 mice were divided into five groups: a normal diet group, a control group fed only a high-fat diet (HFD), a positive control group fed HFD with 0.5% catechin, and groups fed HFD with 0.5% (E1) or 1% (E2) ATREE.
Body weight gain, hematological and serum biochemistry data, and anti-oxidative index in the liver and epididymal adipose tissue were improved significantly in the E groups compared to the control group. Adipocyte size was also reduced by ATREE.
The E groups showed significant increases in adiponectin, AMPK, and PPAR-α, and significant decreases in TNF-α, GPDH, and PPAR-γ. These findings indicate that ATREE might have an anti-obesity effect through antioxidant and anti-inflammatory action.
High-fat diet mouse model (70% ethanol extract):
Treatment with A. triphylla var. japonica extract (ATE) inhibited lipid accumulation without cytotoxicity in 3T3-L1 adipocytes. Furthermore, 200 and 400 mg/kg ATE treatment significantly decreased body weight gain, white adipose tissue weight, and plasma triglyceride levels, while 100 and 200 mg/kg ATE treatment increased plasma high-density lipoprotein cholesterol levels in HFD-induced obese mice, compared with the HFD group.
Evidence strength: Animal studies only. No human clinical data available.
4.6 Anti-Diabetic Activity
Among tested phenylpropanoid and polyacetylene compounds, syringin exhibited 32.2% inhibition and adenophoroside showed 38.9% inhibition of α-glucosidase activity, indicating mild inhibitory potential. Although the reported activities were modest, further research, including additional chemical assays, as well as in vivo and in vitro studies, is necessary to determine their potential as anti-diabetic agents.
Polysaccharides from the related species Adenophora tetraphylla were investigated in a PMC-published study for effects on glucose consumption in HepG2 cells, though the results represent in vitro data only.
Evidence strength: Preliminary; in vitro and limited animal models. The α-glucosidase inhibitory activity of individual compounds was described as modest.
4.7 Hepatoprotective Effects
Limited information is available regarding the hepatoprotective effects of A. triphylla. One study investigated the liver-protective potential of lupeol, a triterpenoid isolated from A. triphylla var. japonica, and its molecular mechanisms in a murine model of fulminant hepatic failure triggered by D-galactosamine (GalN) and lipopolysaccharide (LPS).
Mice were orally administered lupeol at 25, 50, and 100 mg/kg dissolved in olive oil, 1 hour before GalN/LPS treatment. Treatment with GalN/LPS resulted in increased levels of serum alanine aminotransferase, TNF-α, and IL-6, as well as increased mortality, all of which were attenuated by lupeol treatment. Levels of TLR4, MyD88, TRIF, IRAK-1, and TRAF6 protein expression were also increased by GalN/LPS.
Evidence strength: Animal study only; evidence for hepatoprotection is limited and preliminary.
4.8 Estrogenic / Menopausal Symptoms
One study investigated the estrogen-like activity of Adenophora triphylla var. japonica. Water extracts from A. triphylla (ATWE) could bind to estrogen receptors and displaced binding of E2 to ERα and ERβ. ATWE stimulated the proliferation of estrogen receptor-positive MCF-7 cells in a dose-dependent manner. ATWE-induced proliferation was blocked by addition of the estrogen antagonist ICI 182,780. Moreover, ATWE treatment caused a significant increase in mRNA expression of estrogen-responsive genes (pS2, PR, and cathepsin D). These results indicate that A. triphylla has estrogen-like activity and could be used to improve estrogen deficiency-related menopausal symptoms or diseases in postmenopausal women.
Water extracts of A. triphylla alleviate estrogen deficiency-related menopausal symptoms in postmenopausal women, according to references cited in a 2025 metabolomics study, though the original clinical trial data underlying this claim are not independently assessed here.
Evidence strength: The estrogenic mechanism has been demonstrated in vitro (MCF-7 cells). At least one cited reference suggests a clinical observation in postmenopausal women, but this requires independent evaluation. Given the in vitro evidence, the interaction with estrogen receptors is mechanistically plausible but not established in large-scale trials.
4.9 Osteogenesis (Bone Formation)
One study investigated the biological activities of vanillin purified from Adenophora triphylla var. japonica Hara on bone-forming processes. Vanillin treatment induced mineralization as a marker for mature osteoblasts, after stimulating alkaline phosphatase (ALP) staining and activity. The bone-forming processes of vanillin are mainly mediated by the upregulation of the bone morphogenetic protein 2 (BMP2), phospho-Smad1/5/8, and runt-related transcription factor 2 (RUNX2) pathway during the differentiation of osteogenic cells.
Moreover, vanillin promoted osteoblast-mediated bone-forming phenotypes by inducing migration and F-actin polymerization.
These results were the first to indicate that vanillin extracted from A. triphylla can promote bone generation and shield osteoblasts from oxidative stress. Future research should evaluate the osteogenic potential of vanillin in other cell lines and in animal models.
Evidence strength: In vitro cell study only (MC3T3-E1 pre-osteoblast cells). No animal or human data yet available.
4.10 Antifungal Activity
Research cited in the literature notes that Adenophora triphylla var. japonica has been found to inhibit Candida biofilm formation, increase susceptibility to antifungal agents, and reduce infection in in vitro models. Extracts and isolated compounds have been reported to exhibit noteworthy pharmacological activities, including antioxidant, anti-obesity, anti-cancer, anti-diabetic, anti-inflammatory, lung-protective, hepatoprotective, osteogenesis-promoting, anti-angiogenic, anti-fungal, and anti-melanogenic activities in various cell- and animal-based models.
Evidence strength: Preliminary; in vitro only.
5. Body Systems and Health Areas Associated with Adenophora
- Respiratory system: Antitussive, expectorant, lung-protective; anti-allergic effects in asthma models; protection against PM2.5-induced injury.
- Immune system: Saponins, flavonoids, and polysaccharides from A. triphylla var. japonica exhibit anti-inflammatory, antioxidant, and immunomodulatory activities.
- Gastrointestinal / Metabolic system: Mild α-glucosidase inhibitory activity; anti-obesity effects via AMPK/PPAR signaling in preclinical models.
- Hepatic (liver): Hepatoprotective potential via lupeol-mediated suppression of TLR4/TNF-α pathways in animal models.
- Skeletal system: Osteogenic promotion via vanillin-driven BMP2/RUNX2 pathway in in vitro osteoblast models.
- Endocrine / Reproductive system: Demonstrated estrogen receptor binding activity in vitro; potential relevance to menopausal symptoms.
- Oncology (preclinical only): Antiproliferative, pro-apoptotic, and anti-angiogenic activity against multiple cancer cell lines in vitro.
6. Dosages Reported in Scientific Studies
All dosages below are as reported in preclinical (animal) studies. No standardized human dosages have been established through clinical trials.
- Anti-asthma / Airway inflammation (mice):
A. stricta root extract (AsE) was administered at 100–400 mg/kg, dose-dependently decreasing pulmonary congestion in OVA-mediated allergic asthma.
- PM2.5-induced lung injury (mice):
Oral administration of 100–400 mg/kg AsE for 10 days significantly reduced the PM2.5-mediated increase in relative lung weight.
- Anti-obesity — ethanol extract (mice):
C57BL/6 mice were fed HFD with 0.5% (E1) or 1% (E2) ATREE (root ethanol extract).
- Anti-obesity — 70% ethanol extract (mice):
200 and 400 mg/kg ATE treatment significantly decreased body weight gain, white adipose tissue weight, and plasma triglyceride levels, while 100 and 200 mg/kg ATE treatment increased plasma HDL cholesterol in HFD-induced obese mice.
- Hepatoprotection — lupeol (mice):
Mice were orally administered lupeol at 25, 50, and 100 mg/kg dissolved in olive oil.
7. Safety Considerations and Notable Interactions
General Safety Profile
No systematic human safety data (phase I/II trials, formal toxicology assessments) for Adenophora root as a standalone supplement are available in the peer-reviewed English-language literature identified in searches. The following considerations are derived from factual, source-backed information:
Estrogenic Activity and Hormone-Sensitive Conditions
Water extracts of A. triphylla can bind to estrogen receptors and displace binding of E2 to ERα and ERβ. ATWE stimulated the proliferation of estrogen receptor-positive MCF-7 cells in a dose-dependent manner, and this proliferation was blocked by addition of the estrogen antagonist ICI 182,780. Because MCF-7 is an estrogen receptor-positive breast cancer cell line, the demonstrated estrogenic agonism in vitro raises a theoretical concern for use in individuals with hormone-sensitive neoplasms or conditions, although no in vivo or clinical data directly address this risk.
Traditional Contraindications (TCM)
According to traditional materia medica sources, Radix Adenophorae (nan sha shen) is considered to be impaired by Saposhnikoviae radix (fang feng) and is contraindicated in cold of the lung, and cold deficiency of the spleen and stomach. These represent traditional TCM cautions, not experimentally verified pharmacological interactions.
Adulteration and Misidentification Risk
Twelve species and varieties of Adenophora and Glehnia could act as substitutes or adulterants of Radix Adenophorae on commercial markets in South East Asia, with roots of Adenophora hunanensis Nannf. and Glehnia littoralis F. Schmidt ex Miq. being the most common examples. This misidentification risk is a real-world quality and safety concern because the pharmacological profile and safety data of each species differ.
Animal Study Safety Signal (Anti-Obesity Doses)
Treatment with ATE inhibited the lipid accumulation without cytotoxicity in 3T3-L1 adipocytes at tested concentrations, suggesting an acceptable in vitro safety margin at the doses studied. Animal studies at 100–400 mg/kg oral doses did not report overt toxicity in the published lung-injury papers, but formal toxicological characterization was not the primary aim of those studies.
Gap in Human Safety Data
Current evidence is derived primarily from cell-based and animal studies. Clinical studies are needed to validate its therapeutic potential — and by extension, to formally characterize its safety, drug interactions, and appropriate dosing in humans.
8. Current Research Status and Outlook
Many studies have discussed that extracts from A. triphylla plant and its different parts contain a wide variety of phytoconstituents that exhibit diverse pharmacological properties, such as anti-cancer, anti-inflammatory, hepatoprotective, osteogenesis, anti-obesity, anti-diabetic, antioxidant, anti-angiogenesis, anti-fungal, and anti-melanogenic properties as well as protective effects against lung disease and estrogen-like activity.
The metabolomics work provides novel insights into how hydrothermal extraction affects the overall metabolite composition of A. triphylla, supporting its potential application in the development of functional food ingredients.
The body of evidence, while growing, remains at the preclinical stage. Further research, including additional chemical assays, as well as in vivo and in vitro studies, is necessary to determine the potential of identified compounds as anti-diabetic and other therapeutic agents. Translation of preclinical findings into evidence-based clinical applications requires well-designed human trials that have not yet been completed.
References
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