Neferine (Bisbenzylisoquinoline Alkaloid · Cardiac Protective · Autophagy)
| Compound | Neferine |
| Chemical class | Alkaloid — Isoquinoline (Bisbenzylisoquinoline) |
| CAS | 2292-16-2 |
| Primary source | Nelumbo nucifera (sacred lotus seed embryo / Lian Xin) |
| Key applications | Cardiac protective, antitumour, autophagy induction, anti-arrhythmic |
| Claim strength | Moderate |
| Typical form | Nelumbo nucifera seed embryo extract co-constituent |
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Commercial source: Nelumbo nucifera (sacred lotus) flower and seed extract is commercially available. Neferine is concentrated in the seed embryo (Lian Xin) rather than the leaf; dedicated neferine-standardised extracts are available from specialist suppliers. See sourcing options below. Traditional use: Lotus seed embryo (Lian Xin in TCM) is used specifically for calming the heart and mind, reducing palpitations, clearing heat, and supporting cardiovascular function. It is bitterer and more pharmacologically potent than lotus seed or leaf preparations. Neferine is identified as the primary bisbenzylisoquinoline alkaloid responsible for Lian Xin’s cardiovascular and calming activities. Research trajectory: Neferine has attracted dedicated research for cardiac arrhythmia management (hERG channel modulation), autophagy induction (relevant to cancer and longevity research), and anti-inflammatory cardioprotective mechanisms. It is structurally related to tetrandrine and fangchinoline but from lotus rather than Stephania. See sourcing options below.
Evidence for Neferine Applications
Cardiac anti-arrhythmic and hERG modulation: Neferine modulates hERG potassium channels and calcium channels in cardiac tissue, producing antiarrhythmic effects in atrial and ventricular arrhythmia animal models. It prolongs the cardiac action potential duration and reduces triggered arrhythmias. Consistent with Lian Xin traditional use for palpitations and irregular heartbeat. Claim strength: Moderate.
Autophagy induction and antitumour: Neferine is a potent autophagy inducer — it activates autophagic flux in cancer cells via mTOR inhibition and Beclin-1 upregulation, causing autophagic cell death in tumour cells. This is a mechanistically distinct anticancer mechanism from most cytotoxic chemotherapy agents. Antiproliferative activity across multiple cancer cell lines is well-documented. Claim strength: Moderate (preclinical; no human antitumour data).
Cardioprotective and anti-inflammatory: Neferine reduces oxidative stress in cardiomyocytes, inhibits NF-κB in cardiac inflammatory models, and protects against ischaemia-reperfusion cardiac injury in animal models. PI3K/Akt cardioprotective pathway activation is documented. Claim strength: Moderate.
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Dosage & Formulator Specification
No established isolated human supplement dose for neferine. Lotus seed embryo (Lian Xin) TCM dose: 1.5–3 g/day as decoction. For standardised Nelumbo nucifera seed embryo extract containing neferine: 100–300 mg/day is a working range for cardiovascular applications. Neferine content in lotus seed embryo is approximately 0.1–0.5% dry weight; concentrated extracts are available. Specify source as seed embryo (not leaf or petal) for neferine-targeted formulations.
Species-specific sourcing is critical: Nelumbo nucifera seed embryo extract for neferine. Do not substitute blue lotus (Nymphaea caerulea) products. Neferine HPLC quantification on CoA is required for dose specification.
Frequently Asked Questions — Neferine
How does neferine differ from nuciferine?
Nuciferine is a monomeric aporphine alkaloid; neferine is a bisbenzylisoquinoline alkaloid (two connected benzylisoquinoline units — the same structural class as tetrandrine and fangchinoline from Stephania). Both come from Nelumbo nucifera but concentrate in different plant parts: nuciferine in the leaves, neferine in the seed embryo. Their pharmacological profiles are significantly different: nuciferine for dopaminergic/anti-obesity; neferine for cardiac and autophagy-induction applications.
Is neferine’s autophagy induction beneficial outside of cancer contexts?
Autophagy is a cellular housekeeping process that is also implicated in longevity, neurodegenerative disease protection, and metabolic health beyond cancer biology. Neferine’s autophagy-inducing properties are therefore potentially relevant to healthy ageing supplement formulations alongside other mTOR modulators (rapamycin analogue botanicals, spermidine). This is an emerging research direction; clinical evidence is limited.
Does neferine have the same Aristolochia adulteration concern as Stephania alkaloids?
No — neferine comes from Nelumbo nucifera (lotus family, Nelumbonaceae), entirely unrelated botanically to Stephania (Menispermaceae) or Aristolochia (Aristolochiaceae). There is no historical adulteration relationship between lotus and Aristolochia; the nephrotoxicity concern that applies to Stephania fang ji products does not apply to Nelumbo nucifera lotus extracts.
Can neferine be co-formulated with nuciferine in a lotus alkaloid complex?
Yes — combining lotus leaf extract (nuciferine-rich) with lotus seed embryo extract (neferine-rich) provides complementary alkaloid coverage from the same botanical. The combination addresses anti-obesity/metabolic (nuciferine) and cardiovascular/cardiac (neferine) applications within a single lotus-based formulation. This mirrors the way lotus is used holistically in TCM with different plant parts targeting different organ systems.
Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.
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