Lobetyolin

Pharmacology & Research

Lobetyolin is the polyacetylene glucoside (the mono-glucoside of lobetyol) used as the standardisation marker for dang shen (Codonopsis pilosula), the tonic root of traditional Chinese medicine. Two caveats frame the page. First, it is a trace/sub-percent quality marker, not a bulk bioactive — dang shen’s tonic action is attributed to its polysaccharides/fructans, so isolate potency does not transfer to whole-root doses. Second, its oral bioavailability is poor (~4% in rats). Within those limits it has one genuinely distinctive hook: a preclinical anticancer mechanism that starves tumour cells of glutamine by suppressing the transporter ASCT2 (SLC1A5) ^{2,3Reference 22023Lobetyolin inhibits cell proliferation and induces apoptosis by downregulating ASCT2 in gastric cancerView study →Reference 32020Lobetyolin induces apoptosis of colon cancer cells by inhibiting glutamine metabolismView study →}. There are no human trials of the isolate.

1. Anticancer (glutamine / ASCT2)

The distinctive mechanism: lobetyolin downregulates ASCT2 (SLC1A5), the sodium-dependent glutamine transporter tumours depend on, cutting glutamine uptake → ROS accumulation → mitochondria-mediated apoptosis, shown in gastric ^{2Reference 22023Lobetyolin inhibits cell proliferation and induces apoptosis by downregulating ASCT2 in gastric cancerView study →} and colon ^{3Reference 32020Lobetyolin induces apoptosis of colon cancer cells by inhibiting glutamine metabolismView study →} cancer cells with in-vivo tumour-growth restraint in gastric xenografts ^{2Reference 22023Lobetyolin inhibits cell proliferation and induces apoptosis by downregulating ASCT2 in gastric cancerView study →}; a separate hepatocellular-carcinoma study reports a different DUSP1–ERK1/2 axis ^{4Reference 42024Lobetyolin suppresses the proliferation of hepatocellular carcinoma through activating the DUSP1-ERK1/2 signalling pathwayView study →}, and a review collates the field ^{1Reference 12021ReviewAnticancer properties of lobetyolin, an essential component of Radix Codonopsis (dang shen) — reviewView study →}.

Gap: entirely cell-line/xenograft with no isolate human data, and effective concentrations are far above anything reachable from dietary dang shen given trace abundance and ~4% oral bioavailability ^{2,9Reference 22023Lobetyolin inhibits cell proliferation and induces apoptosis by downregulating ASCT2 in gastric cancerView study →Reference 92021AnimalComparative pharmacokinetic and bioavailability study of lobetyolin in rats after administration of lobetyolin and Codonopsis pilosula extractView study →}.

2. Anti-inflammatory

Lobetyolin lowered pro-inflammatory cytokine output from macrophages and protected mice against LPS-induced sepsis ^{5Reference 52024AnimalLobetyolin protects mice against LPS-induced sepsis by downregulating inflammatory-cytokine production in macrophagesView study →}.

Gap: a single primary in-vivo study, with the mechanism thin (NF-κB the plausible node but not dissected) and no dose-response translation to humans ^{5Reference 52024AnimalLobetyolin protects mice against LPS-induced sepsis by downregulating inflammatory-cytokine production in macrophagesView study →}.

3. Gastroprotective

By spectrum-effect analysis of dang shen, lobetyolin (with tangshenoside I) was identified as an active contributor to gastric-ulcer prevention ^{6Reference 62025The effect and mechanism of Codonopsis Radix and its active components tangshenoside I and lobetyolin on preventing gastric ulcer based on a spectrum-effect relationshipView study →}.

Gap: the effect is attributed within a whole-herb spectrum-effect model, not a standalone isolate efficacy trial, and it is co-active with other markers ^{6Reference 62025The effect and mechanism of Codonopsis Radix and its active components tangshenoside I and lobetyolin on preventing gastric ulcer based on a spectrum-effect relationshipView study →}.

4. Metabolic / neuro (exploratory)

Lobetyolin has been profiled as a dietary “anti-Alzheimer factor” in a metabolism/target-exploration study ^{7Reference 72025Lobetyolin, an anti-Alzheimer factor from a dietary Campanulaceae source: metabolism regulation and target explorationView study →}.

Gap: a single mechanistic paper — speculative and not a supported clinical claim ^{7Reference 72025Lobetyolin, an anti-Alzheimer factor from a dietary Campanulaceae source: metabolism regulation and target explorationView study →}.

Mechanisms

Target / pathway	Effect	Relevant to
ASCT2 / SLC1A5 (glutamine transporter)	downregulated → ↓ glutamine uptake	anticancer (the distinctive hook)
Glutamine metabolism → ROS	↓ glutaminolysis, ROS accumulation → mitochondrial apoptosis	anticancer
DUSP1 → ERK1/2	activated → antiproliferative	hepatocellular carcinoma
Macrophage cytokines (NF-κB-type output)	↓ pro-inflammatory cytokines	anti-inflammatory / sepsis
CYP450 (CYP2C19, 1A1, 2C9, 1A2)	substrate; oxidation/glucuronidation/GSH conjugation	pharmacokinetics

Only mechanisms with a verified supporting study are listed.

Pharmacokinetics

Lobetyolin is a polyacetylene glucoside subject to gut hydrolysis/deglycosylation — the aglycone lobetyol is metabolically stable in liver microsomes, while the glucosides are extensively transformed (dozens of metabolites via oxidation, glucuronidation and glutathione conjugation; CYP2C19/1A1/2C9/1A2 implicated) ^{8Reference 82023In-vitro/in-vivo metabolic pathways of lobetyol, lobetyolin and lobetyolinin, three polyacetylenes from Codonopsis Radix, by UHPLC-Q/TOF-MSView study →}. Its oral bioavailability is poor — ~3.9% for pure lobetyolin in rats, rising to ~7.0% when dosed within Codonopsis pilosula extract (a matrix effect), consistent with the whole-root-over-isolate pattern ^{9Reference 92021AnimalComparative pharmacokinetic and bioavailability study of lobetyolin in rats after administration of lobetyolin and Codonopsis pilosula extractView study →}. Polyacetylenes as a class can be light/oxygen-labile, and formal lobetyolin degradation kinetics were not located, so isolate stability is uncertain.

Clinical trials

There are no human trials of isolated lobetyolin; all human exposure is indirect, as a trace marker within Codonopsis pilosula (dang shen) preparations, and all efficacy data are cell-line, xenograft or rodent.

Last checked: July 2026.

Toxicity & Safety

No isolate toxicology of concern was identified. Lobetyolin is a natural trace constituent of dang shen — a food-grade tonic herb with a long dietary and medicinal history, ingested at sub-percent levels in the root — which is a strong if indirect safety signal at dietary exposure, supporting a [low] flag. No genotoxicity, reproductive-toxicity or repeat-dose isolate studies were located, so this reflects absence of data rather than an affirmative clean bill for concentrated/isolated use.

Pregnancy & lactation

Avoid isolated/concentrated use — insufficient data. There are no isolate-specific reproductive-safety data; dang shen is a traditional tonic but is not established as safe in pregnancy in controlled data, and concentrated isolated lobetyolin has no pregnancy/lactation safety record.

Dosage

There is no established human dose for isolated lobetyolin — it is a standardisation/quality marker, not a dosed supplement. Preclinical figures (in-vitro µM ranges, rodent mg/kg) are experimental exposures, not guidance, and practical human intake occurs only as a trace fraction of Codonopsis pilosula root preparations.

References