Dendrobine

Other Names

(1S,4S,7S,8R,11R,12R,13S)-2,12-dimethyl-13-propan-2-yl-10-oxa-2-azatetracyclo[5.4.1.18,11.04,12]tridecan-9-one(3α,6α,7R,8S,9R,10α,11α)-Dendrobane-12-one(8Beta)-Dendroban-12-one12-Oxodendrobane5,8-Methano-6H-7-oxa-1-azacyclopent[cd]azulen-6-one, decahydro-1,8b-dimethyl-9-(1-methylethyl)-, (2aS,4aS,5R,8R,8aS,8bR,9S)-7,5-(Epoxymethano)-1H-cyclopent[cd]indol-9-one, decahydro-1,7b-dimethyl-6-(1-methylethyl)-, (2aS,4aS,5R,6S,7R,7aS,7bR)-7,5-(Epoxymethano)-1H-cyclopent[cd]indol-9-one, decahydro-1,7b-dimethyl-6-(1-methylethyl)-, [2aS-(2aα,4aα,5β,6α,7β,7aα,7bα)]-Dendroban-12-onDendroban-12-oneDendrobinNSC 607862Shi Hu jian (石斛碱, TCM context)Shihu alkaloid石斛碱

Synopsis

Dendrobine: A Comprehensive Reference

1. Identity: Botanical Source, Chemical Names, and Physical Characteristics

Dendrobine is the first identified sesquiterpene alkaloid from Dendrobium nobile Lindl., and is recommended as the exclusive chemical marker for the quality control of this species by the Chinese Pharmacopoeia (2015 and 2020 editions). The genus Dendrobium belongs to the flowering plant family Orchidaceae and comprises more than 1,400 species. The primary source of dendrobine in commerce and research is the stems of Dendrobium nobile Lindl., a species distributed across tropical and subtropical Asia.

In China, Dendrobium, including Dendrobium nobile Lindl., Dendrobium huoshanense, Dendrobium chrysotoxum Lindl., Dendrobium fimbriatum Hook, and Dendrobium officinale, is mainly distributed in Guizhou, Yunnan, Guangxi and other sub-tropical areas south of the Yangtze River.

Dendrobine is characterized chemically as follows:

Molecular formula: C₁₆H₂₅NO₂ (PubChem CID 442523).
Molecular weight: 264.195 Da.
CAS number: 2115-91-5 (also referred to as (−)-Dendrobine).
Physical form: Dendrobine is an alkaloid found in Dendrobium nobile at an average of 0.5% by weight. It is a colorless solid at room temperature, related to the picrotoxin family of natural products.
Ring system: Dendrobine possesses a complicated tetracyclic ring system and seven contiguous stereocenters, displaying remarkable bioactivities.

The representative alkaloid in the Dendrobium genus is dendrobine, which is based on the picrotoxane skeleton and has been found to exert inhibitory effects on various tumors. Dendrobine makes up 92.6% of the total Dendrobium nobile Lindl. alkaloid (DNLA) fraction.

The Chinese Pharmacopoeia rule specifies that the mass fraction of dendrobine should be greater than 0.4% in medicinal Dendrobium nobile Lindl.

Several structurally related dendrobine-type alkaloids have been isolated from Dendrobium species alongside dendrobine itself. Six dendrobine-type alkaloids isolated from the tubes of Dendrobium nobile have been identified as N-methoxylcarbonyldendrobine, dendronboic acid, dendrobine, 6-hydroxyldendrobine, dendrobine N-oxide, and denrine. To date, the structural and molecular formulae of various alkaloids have been identified, including dendrobine, nobilonine, dendroxine, dendrine, 6-hydroxydendroxine, and 8-hydroxydendroxine.

2. Traditional and Historical Use

2.1 Traditional Chinese Medicine (TCM)

A high proportion of species native to China from the genus Dendrobium (Orchidaceae) have been used as folk medicine for more than 2,300 years. The fresh or dried stem of many Dendrobium species is regarded as a "superior grade" tonic for its traditional properties of nourishing the kidney, moisturizing the lung, benefiting the stomach, promoting the production of body fluids, and clearing heat.

Documented as a "superior grade" herbal medicine in the ancient text "Shen Nong's Herbal Classic," Dendrobium has been used for thousands of years and is now a popular health food worldwide. The fresh or dried stems of many Dendrobium species are well known as one of the most expensive tonics in traditional Chinese medicine.

Dendrobium is a member of the orchid (Orchidaceae) family and has been used in traditional Chinese medicine for many centuries to treat thirst, fever, diabetes, infection, inflammation, cancer, protect eyesight, and improve appetite and digestion.

In TCM, Dendrobium nobile is known by the Chinese name Shi Hu (石斛). As a traditional Chinese herbal medicine, Dendrobium provides nourishment to the stomach, controls inflammation, facilitates heat clearance, relieves pain, generates body fluid, maintains "yin," and detoxifies toxins.

Among the medicinal species, Dendrobium nobile Lindl., D. chrysotoxum Lindl., and D. fimbriatum Hook are officially listed in the Pharmacopoeia of the People's Republic of China (2015 edition), and uniformly classified in the category of Dendrobium with dendrobine, erianin, and dendrophenol as the active ingredients, respectively.

Traditional preparations include decoctions of fresh or dried stems, as well as elaborated formulas incorporating Dendrobium as a component. Dendrobium nobile is a famous Chinese materia medica and common food ingredient that has been consumed for thousands of years in Chinese history. Many Chinese medical prescriptions, which have been clinically proven to be effective, contain D. nobile, including Shihuyin, Shihusan, and Shihu Yeguang pills, all of which are used in the treatment of clinical diabetes mellitus and its complications.

2.2 Broader Asian Traditions

Many Dendrobium species have been used as medicinal plants in several Asian countries for thousands of years. Herba dendrobii (Shi Hu), a medicinal orchid (family: Orchidaceae), has been widely used for health improvement as an herbal tea, and it is included in traditional Chinese and other Asian folk medicines for its antipyretic, ophthalmic, and tonic benefits.

2.3 Early Scientific Investigation

Although Dendrobium alkaloids have been isolated and identified since the 1930s, the composition of alkaloids and their biosynthesis pathways have remained unresolved scientific issues until recently. Dendrobine was first isolated from D. nobile by Yusuki and colleagues in 1932. Chen and colleagues in 1935 identified 15 mg/kg dendrobine with a weak analgesic effect on mice and 8.5 mg/kg dendrobine with antipyretic effects on rabbits.

3. Phytochemistry: Key Constituents and the Role of Dendrobine

The active constituents in Dendrobium include polysaccharides, alkaloids, flavonoids, amino acids, bibenzyls, and several trace elements. The polysaccharides exhibit immunomodulatory and hepatoprotective activities, while the alkaloids are antioxidant, anticancer, and neuroprotective; other compounds display anti-angiogenesis, anti-cytotoxicity, and anti-mutagenesis effects.

The main constituents found in the stem are alkaloids, including dendrobine, dendroxine, dendramine, dendrine, dendrobine N-oxide, nobilonine, dendrochrysine, and moscatiline. These alkaloids are primarily responsible for the analgesic, anti-inflammatory, and antipyretic effects. The stems also contain polysaccharides, such as dendronan and glucans, which exhibit immunomodulatory and antitumour activities.

The proportional breakdown of the DNLA alkaloid fraction has been quantified: alkaloids extracted from Dendrobium nobile contain a variety of monomer components, including dendrobine (92.6%), dendrobine-N-oxide (3.3%), nobilonine (2.0%), dendroxine (0.9%), 6-hydroxynobilonine (0.32%), and 13-hydroxy-14-oxodendrobine (0.07%).

More than sixty alkaloids have been isolated and identified from the Dendrobium genus. Picrotoxane-type alkaloidal sesquiterpenoids, also known as dendrobine-type alkaloidal sesquiterpenoids, are represented by the endemic constituent dendrobine of Dendrobium.

Dendrobine's total chemical synthesis has attracted significant interest from organic chemists due to its structural complexity. There have been three successful enantioselective syntheses of dendrobine reported, with yields ranging from 0.2–4.0%. The structure of dendrobine is intriguing due to its tetracyclic ring system with seven contiguous stereocenters.

4. Mechanisms of Action

4.1 Neurological Mechanisms

Alkaloidal extracts from D. nobile administered orally in mice revealed a significant decrease in stress in the endoplasmic reticulum, as well as reductions in calpain 1, CDK5, and GSK-3β levels, and a consequent decrease in the rate of tau hyperphosphorylation. These two kinases — CDK5 and GSK-3β — are central to the pathological hyperphosphorylation of tau protein characteristic of Alzheimer's disease.

Dendrobine is known to elicit various health benefits including antioxidant, anti-inflammatory, antibacterial, anti-apoptotic, and anti-aging activities. Dendrobine not only improves mitochondrial function and reduces intracellular ROS production but also functions as a natural agonist of Nrf2, thereby increasing SOD, CAT, and GSH-Px levels and attenuating oxidative damage by inhibiting ferroptosis.

Dendrobine is a strongly selective competitive antagonist of β-alanine, taurine, and glycine — inhibitory neurotransmitter amino acids — which accounts for its convulsant properties at high doses and, at sub-toxic concentrations, may contribute to its modulation of neural excitability.

DNLA-exerted neuroprotection against LPS-induced neuronal damage and cognitive impairment was not observed in NLRP3 knockout mice. This study suggested that DNLA attenuated NLRP3-mediated pyroptosis to generate neuroprotection against LPS-induced neuronal damage and cognitive impairment.

4.2 Anticancer Mechanisms

The representative alkaloid dendrobine has been found to exert inhibitory effects on various tumors. The primary anti-tumor mechanism of dendrobine involves inhibiting the activation of proto-oncogenes.

Active components such as dendrobine reduce the expression of E-cadherin inhibitory factor, which in turn attenuates the epithelial–mesenchymal transition (EMT) of cells by inhibiting the TGF-β/Smads signaling pathway, Wnt/β-catenin signaling pathway, and PI3K/Akt/mTOR signaling pathway.

Dendrobine exhibits anticancer properties by decreasing tumor angiogenesis and metastasis, causing apoptosis in cancer cells, and inhibiting cancer cell growth.

4.3 Anti-inflammatory and Antioxidant Mechanisms

Dendrobium plays a hepatoprotective role by regulating TLR4/NF-κB, TNF-α, and NLRP3 inflammatory signaling pathways.

Dendrobine mitigates liver damage in metabolic associated fatty liver disease (MASLD) through modulating inflammatory and immune responses and affecting lipid metabolism, potentially by downregulating inflammatory mediators like TNF, IL6, IL1B, and inhibiting AKT1 and Signal Transducer and Activator of Transcription 3 (STAT3).

4.4 Metabolic and Glycemic Mechanisms

Western blotting experiments confirmed that D. nobile activated the PI3K/AKT pathway and insulin signaling pathway, promoted glycogen synthesis via regulating the expression of glycogen synthase kinase 3 beta (GSK-3β) and glucose transporter 4 (GLUT4), and inhibited liver gluconeogenesis by regulating the expression of phosphoenolpyruvate carboxykinase (PEPCK) and glucose 6 phosphatase (G6pase) in the liver.

4.5 Antiviral Mechanisms

Dendrobine has demonstrated antiviral activity against influenza A viruses, including A/FM-1/1/47 (H1N1), A/Puerto Rico/8/34 H274Y (H1N1), and A/Aichi/2/68 (H3N2), with IC₅₀ values of 3.39 ± 0.32, 2.16 ± 0.91, and 5.32 ± 1.68 μg/mL, respectively. Mechanism studies revealed that dendrobine inhibited early steps in the viral replication cycle.

4.6 Early-Identified Classical Pharmacological Actions

Dendrobine (C₁₆H₂₅O₂N) has a slight but demonstrable analgesic and antipyretic action — much weaker than that of amidopyrine. It produces moderate hyperglycemia, diminishes cardiac activity in large doses, lowers blood pressure, suppresses respiration, inhibits isolated rabbits' intestines, and contracts isolated guinea pigs' uteri.

5. Scientific Evidence by Area of Use

5.1 Neurodegeneration and Alzheimer's Disease

Evidence level: Preclinical (animal and cell models); no published human clinical trials specifically for isolated dendrobine.

Previous studies have shown that Dendrobium nobile Lindl. alkaloids (DNLAs) have neuroprotective effects in several Alzheimer's disease (AD) models. Dendrobine is one of the monomer components with the highest content in DNLAs. However, the effects of dendrobine on cognitive impairments in AD remained unknown until investigation of its efficacy in 3×Tg-AD mice.

In this study, researchers investigated the efficacy of dendrobine in 3×Tg-AD mice to determine whether it was a key component of the anti-AD effect of DNLAs. Five-month-old mice were intragastrically administered dendrobine (10 and 20 mg/kg/d) or DNLAs (20 mg/kg/d) for seven consecutive months, and the effects were evaluated at twelve months. The results revealed that 3×Tg-AD mice treated with dendrobine showed enhanced nesting ability. Dendrobine also effectively rescued spatial learning and memory deficits in 3×Tg-AD mice. Meanwhile, dendrobine treatment prevented the loss of dendritic spine density, with increased expression levels of synaptophysin, PSD95, and NCAM in the hippocampus. Finally, dendrobine ameliorated the increase in APP, sAPPβ, CTF-β, and β-amyloid peptides, accompanied by the promotion of GSK phosphorylation at the Ser9 site, thereby reducing hyperphosphorylated tau levels.

As the active component of DNLA, dendrobine can preserve cognitive function, alleviate neuronal and synaptic defects, and improve APP/tau pathology in 3×Tg-AD mice. This study was conducted in an animal model; it does not establish clinical efficacy in humans.

In a mouse model of AD, the administration of dendrobine restored iron metabolism in the brain tissue to normal levels. Furthermore, dendrobine substantially reduced iron levels by upregulating FTH proteins responsible for iron storage, Fpn1 proteins that regulate iron efflux, and downregulating TfR proteins that mediate iron uptake.

5.2 Diabetes and Metabolic Disorders

Evidence level: Preclinical (animal models and cell assays); one study with a clinical component; no large randomized controlled trials in humans for isolated dendrobine.

Dendrobium officinale, as a traditional Chinese medicine, is widely used to treat diabetes and dementia in clinical practice. Dendrobine, a pyrrolizidine derivative alkaloid purified from Dendrobium officinale, has been reported to have multiple biological activities including blood glucose regulation, anti-inflammatory, and neuroprotection. For example, it could reduce blood glucose levels and increase insulin levels and sensitivity in gestational diabetes mellitus.

In a study of type 2 diabetic rats, blood glucose levels were assessed by oral glucose tolerance test (OGTT). The rats treated with D. nobile extract (DNE) or D. nobile polysaccharides (DNP) had relatively low blood glucose levels. The OGTT results indicated D. nobile could ameliorate glucose intolerance in T2DM rats.

One study investigating the therapeutic mechanisms of dendrobine for metabolic associated fatty liver disease (MASLD) management utilized network pharmacology combined with experimental validation. The clinical effectiveness of dendrobine in MASLD treatment was assessed and analyzed, demonstrating significant improvement in liver function among MASLD patients treated with Dendrobium nobile. This study incorporated a clinical component but used Dendrobium nobile as a whole plant preparation rather than isolated dendrobine; conclusions about the isolated compound must be drawn cautiously.

Ferroptosis plays a crucial role in the development of dementia and dendrobine possesses hypoglycemic and neuroprotective effects. In db/db mice and advanced glycation end products (AGEs)-induced HT22 cells, after oral administration with dendrobine or metformin for 8 weeks, behavioral tests were used to assess cognitive capacity.

5.3 Anticancer Activity

Evidence level: In vitro (cell lines) and some in vivo (xenograft mouse models); no human clinical trial data.

Using cell proliferation assays, the IC₅₀ value of dendrobine against colorectal cancer cells was calculated to be 5.769 μM, indicating that at this concentration dendrobine can inhibit the growth of 50% of colorectal cancer cells. This study explored the potential targets and anticancer mechanisms of dendrobine from Dendrobium nobile in the treatment of colorectal cancer through network pharmacology.

Dendrobine decreases viability of A549 (non-small cell lung cancer) cells at concentrations ranging from 2.5 to 15 μg/ml. It induces apoptosis in A549 cells at concentrations ranging from 1 to 10 μg/ml, and increases JNK phosphorylation and sensitizes A549 cells to cisplatin at 10 μg/ml. Dendrobine at 50 mg/kg per day reduces tumor growth in an A549 mouse xenograft model, with an additive effect when used in combination with cisplatin.

The combination of dendrobine from Dendrobium nobile and cisplatin (DDP) may enhance cytotoxicity in lung cancer cells by stimulating the JNK/p38 stress signaling pathways.

In vivo, 6-week-old male BALB/c nude mice with 8505C (anaplastic thyroid cancer) xenografts were administered dendrobine (10 or 40 mg/kg/d) or saline for 21 days. Given that IL-6 is a key activator of STAT3 signaling transduction and tumor metastasis, ATC cells were pretreated with IL-6 to evaluate its potential to reverse dendrobine's anticancer effects. Results showed that IL-6 partially restored proliferation and migration capacities in dendrobine-treated cells while also restoring phosphorylation levels of JAK1, JAK2, and STAT3.

A network pharmacology approach exploring the role of dendrobine in renal cell carcinoma (RCC) treatment identified STAT3 as a key target. A series of in vitro experiments confirmed that dendrobine inhibits RCC cell growth.

Dendrobine decreased the cell viability of lung cancer cells. Dendrobine and anti-PD-L1 together decreased tumor growth, increased caspase-3 expression, and reduced Ki-67 expression in tumor tissues, suggesting potential synergy with immunotherapy checkpoint inhibitors in preclinical settings.

All anticancer findings are from cell-line and xenograft animal studies. No clinical trial data for isolated dendrobine in human cancer has been published to date.

5.4 Hepatoprotection

Evidence level: Preclinical animal models and in vitro; one study with clinical patients using whole plant preparation.

Dendrobine significantly reduced ALT and AST levels in palmitic acid-treated HepG2 cells, indicating hepatoprotective properties and amelioration of oxidative stress through decreased malondialdehyde (MDA) levels and increased superoxide dismutase (SOD) levels.

Acute liver injury (ALI) represents a critical clinical challenge. Dendrobine is the main bioactive component of Dendrobium nobile Lindl., a traditional Chinese herb renowned for its protective effects against liver injury. In a CCl₄-induced acute liver injury mouse model, dendrobine was shown to alleviate hepatic damage through activation of the Nrf2/PPARγ/SOD2 signaling pathways, inhibiting necroptosis.

5.5 Antiviral Activity

Evidence level: In vitro only; no clinical trial data.

Dendrobine, a major component of Dendrobium nobile, was investigated for potential effects against influenza A virus. The results indicated that dendrobine possessed antiviral activity against influenza A viruses, including A/FM-1/1/47 (H1N1), A/Puerto Rico/8/34 H274Y (H1N1), and A/Aichi/2/68 (H3N2), with IC₅₀ values of 3.39 ± 0.32, 2.16 ± 0.91, and 5.32 ± 1.68 μg/mL, respectively. Mechanism studies revealed that dendrobine inhibited early steps in the viral replication cycle. These findings are from cell-based assays; no human trials have been published.

5.6 Analgesic and Antipyretic Effects

Evidence level: Early animal studies; no human clinical data.

While dendrobine's effects on humans have not been studied extensively, studies of its pharmacological effects on various small animals were conducted in 1935 by Chen and Chen. It was concluded that dendrobine exhibited a weak analgesic effect when administered to mice (5–15 mg/kg), and an antipyretic effect when administered to rabbits (8.5 mg/kg). Hypotensive effects were also reported in experiments with frogs, cats, and a dog.

Of dendrobine and related compounds, dendrobine has pharmacological effects that include analgesic (pain-killing) and anti-fever effects. These alkaloids are primarily responsible for the analgesic, anti-inflammatory, and antipyretic effects.

5.7 Parkinson's Disease

Evidence level: Preclinical animal/cell models only.

Dendrobine could inhibit dopaminergic neuron apoptosis in MPTP/MPP⁺-induced Parkinson's disease models. This finding comes from cell and rodent model work and has not been replicated in human studies.

6. Dosage Forms and Reported Doses

Dendrobine is not approved as a standalone drug or dietary supplement ingredient in most Western regulatory jurisdictions, and no established recommended daily intake exists. The following doses reflect those reported in the scientific literature:

In a 3×Tg-AD mouse study, dendrobine was intragastrically administered at doses of 10 and 20 mg/kg/d for seven consecutive months.
In a murine study assessing neuroprotective activity, the alkaloidal extract was administered orally in mice at 40 mg/kg.
In an A549 non-small cell lung cancer xenograft model, dendrobine was used at 50 mg/kg per day.
In a study of anaplastic thyroid cancer, dendrobine was administered at doses of 10 and 40 mg/kg, demonstrating lower toxicity compared to other known STAT3 inhibitors such as ODZ10117 (1 mg/kg) and SG-1721 (0.5 mg/kg).
In classical animal pharmacology experiments, dendrobine exhibited a weak analgesic effect when administered to mice at 5–15 mg/kg, and an antipyretic effect when administered to rabbits at 8.5 mg/kg.
In a diabetic encephalopathy model using db/db mice, dendrobine was administered orally for 8 weeks.

All above doses are from animal studies. Dendrobium is now an ingredient in some pre-workout dietary supplements marketed to enhance physical or athletic performance; however, little evidence indicates that dendrobine is effective for this purpose. No human-validated dosing regimen for isolated dendrobine has been established by any regulatory body or published clinical trial.

In terms of plant material: dendrobine is a noteworthy alkaloid found in Dendrobium nobile, typically comprising about 0.5% of its total weight. The Chinese Pharmacopoeia specifies a minimum of 0.4% dendrobine content in medicinal-grade plant material. Dendrobium can be harvested all year round, and the newly picked Dendrobium and its dried stems can be used medicinally.

7. Safety Considerations and Drug Interactions

7.1 Acute Toxicity

The minimal lethal dose determined by intravenous injection in white mice and rats is 20 mg/kg, that in guinea pigs is 22 mg/kg, and that in rabbits is 17 mg/kg. Death is preceded by convulsions. The convulsions caused by dendrobine appear to be central in origin — probably due to the stimulating action on both the medulla and the spinal cord.

When given a fatal dose, death is usually caused by convulsions. This convulsant risk is consistent with dendrobine's activity as a competitive antagonist of inhibitory amino acid neurotransmitters.

7.2 Subchronic and Genetic Toxicity (Whole Plant Extracts)

One study assessed the 90-day oral toxicity and genetic safety of aqueous extracts of Dendrobium Taiseed Tosnobile (DTTE) in male and female Sprague-Dawley (SD) rats. Eighty rats were divided into four groups. DTTE was given orally to rats at 800, 1,600, or 2,400 mg/kg for 90 consecutive days. Throughout the study period, no abnormal changes were observed in clinical signs, body weight, or ophthalmological examinations. No significant differences were found in urinalysis, hematology, and serum biochemistry parameters between the treatment and control groups. Necropsy and histopathological examination indicated no treatment-related changes. Based on these results, the no-observed-adverse-effect level (NOAEL) of DTTE was greater than 2,400 mg/kg in SD rats. This safety assessment applies to a whole plant extract, not isolated dendrobine.

7.3 In Vivo Safety at Research Doses

While dendrobine did not significantly alter serum kidney parameters in one xenograft study, indicating the absence of notable toxic effects and supporting its safety as a potential anticancer agent, dendrobine was administered in that study at doses of 10 and 40 mg/kg. Experiments related to how dendrobine affects cell growth and proliferation, as well as more detailed safety evaluations of dendrobine in cells and animals, should be further improved in subsequent studies. Investigating the toxicity range of dendrobine on normal cells and conducting pharmacokinetic studies in animals will provide important theoretical support for its future clinical application.

7.4 Drug–Drug Interactions: CYP Enzyme Inhibition

The inhibition of CYP3A4 by dendrobine was found to be noncompetitive (K_i = 6.41 μM) and time-dependent (K_I = 2.541 μM⁻¹, K_inact = 0.0452 min⁻¹), while the inhibition of CYP2C19 and CYP2D6 was found to be competitive with K_i values of 5.22 and 7.78 μM, respectively, and showed no time-dependent trends. The in vitro inhibitory effect of dendrobine implies potential drug–drug interactions between dendrobine and CYP3A4-, CYP2C9-, and CYP2D6-metabolized drugs. Nonetheless, these findings need further in vivo validation.

CYP3A4, CYP2C19, and CYP2D6 are among the most clinically important cytochrome P450 enzymes responsible for the metabolism of a large proportion of pharmaceutical drugs. This in vitro finding suggests that co-administration of dendrobine with substrates of these enzymes warrants caution and further pharmacokinetic investigation, as the clinical significance has not yet been confirmed in humans.

7.5 Conservation and Supply Considerations

The high market demand has led to excessive harvesting and exploitation of D. nobile, which has contributed to resource depletion. Due to overexploitation and depletion of wild plant resources, certain Dendrobium species have been considered secondary endangered plants in the "China Plant Red Data Book." The production of dendrobine by the D. nobile plant species is limited due to its slow growth rate. Consequently, the quantity of dendrobine derived from D. nobile is limited.

8. Overall Evidence Assessment

The existing body of evidence for dendrobine spans several decades and encompasses early classic pharmacology (1930s animal studies), modern in vitro cell experiments, animal model studies, and limited clinical observations using whole Dendrobium preparations. A comprehensive review of dendrobine notes its diverse biological effects, including anti-inflammatory, antioxidant, neuroprotective, immunomodulatory, and anticancer effects.

However, it is essential to note that virtually all research on isolated dendrobine has been conducted in cell lines or animal models. Dendrobine's effects on humans have not been studied extensively. The pharmacological actions documented in the 1930s (analgesic, antipyretic) and the more recently elucidated molecular mechanisms (CDK5/GSK-3β inhibition, Nrf2 activation, NLRP3 suppression, JAK-STAT3 inhibition) are largely based on preclinical data. Translating these findings to human clinical outcomes requires dedicated randomized controlled trials of isolated dendrobine, which have not yet been published. The areas with the most developed preclinical evidence base are neurodegenerative disease (Alzheimer's, Parkinson's), oncology (lung, colorectal, renal, thyroid cancers), and metabolic disease (type 2 diabetes, MASLD).

References

Health Conditions

Health conditions that Dendrobine may help support.

No conditions available.

Body Systems

Body systems that Dendrobine may help support.

No body systems available.