# Narciclasine **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/narciclasine **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-04-05 **Evidence Score:** 2 / 10 **Category:** Compound **Also Known As:** Isocarbostyril alkaloid, Amaryllidaceae alkaloid compound, Narcissus alkaloid, Lycoris alkaloid extract ## Overview Narciclasine is an Amaryllidaceae alkaloid demonstrating cytostatic effects and antitumor potential by inhibiting protein biosynthesis. Its mechanism involves Rho activation in certain cancer cell lines. ## Health Benefits • Exhibits cytostatic effects in animal models, inhibiting murine sarcoma cell growth [Preclinical]. • Shows potential antitumor activity in glioblastoma cell lines via Rho activation [In-vitro]. • Inhibits protein biosynthesis more potently than DNA synthesis in cellular studies [Preclinical]. • Activates RhoA GTPase, contributing to actin polymerization and cytoskeleton organization [In-vitro]. • Demonstrates antigrowth effects in wheat grain radicles at low concentrations [Early studies]. ## Mechanism of Action Narciclasine primarily exerts its cytostatic effects through potent inhibition of protein biosynthesis, more significantly than DNA synthesis. In glioblastoma cell lines, it has been shown to activate Rho, contributing to its potential antitumor activity. ## Clinical Summary Preclinical studies indicate Narciclasine inhibits murine sarcoma cell growth, demonstrating cytostatic effects in animal models. In-vitro research on glioblastoma cell lines suggests potential antitumor activity, mediated partly by Rho activation. Cellular studies further reveal its potent inhibition of protein biosynthesis compared to DNA synthesis. Currently, evidence is limited to preclinical and in-vitro investigations; human clinical trials are absent. ## Nutritional Profile Narciclasine is an isocarbostyril alkaloid extracted from Narcissus bulbs (daffodil family, Amaryllidaceae); it exhibits potent antiproliferative activity at nanomolar concentrations by inhibiting eukaryotic peptidyl transferase on the 60S ribosomal subunit and disrupting actin cytoskeleton dynamics, classifying it as a research-stage cytotoxic compound rather than a nutritional ingredient. ## Dosage & Preparation No clinically studied dosage ranges exist due to the absence of human trials. Preclinical studies report effects at concentrations of 0.05–0.5 µg/mL in cell lines. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Given the early stage of research, comprehensive safety data for Narciclasine in humans is currently unavailable. Preclinical studies primarily focus on its therapeutic potential, not systemic toxicity or side effect profiles. Potential drug interactions, contraindications, and safety during pregnancy or lactation remain uncharacterized due to the lack of human clinical data. Caution is advised, as it exhibits potent cellular effects. ## Scientific Research No human clinical trials or meta-analyses have been identified; narciclasine is primarily studied in preclinical and in-vitro settings. No PMIDs for human studies are available. ## Historical & Cultural Context There is no evidence of traditional or historical medicinal use for narciclasine. It was identified in 1967 as a plant antigrowth factor rather than for therapeutic purposes. ## Synergistic Combinations Curcumin, resveratrol, quercetin, EGCG, sulforaphane ## Frequently Asked Questions ### What is Narciclasine and where is it found? Narciclasine is a naturally occurring Amaryllidaceae alkaloid, a class of biologically active compounds found in plants, particularly from the Amaryllis family like daffodils. It has garnered scientific interest for its significant biological activities, especially its cytostatic and antitumor properties. ### How does Narciclasine exert its effects at a molecular level? Narciclasine primarily acts by potently inhibiting protein biosynthesis, a crucial process for cell growth and division, demonstrating a stronger inhibitory effect than on DNA synthesis. In specific cancer cell lines, such as glioblastoma, it has been observed to activate the Rho signaling pathway, contributing to its antiproliferative effects. ### What are the potential health benefits of Narciclasine? Preclinical animal models indicate Narciclasine exhibits cytostatic effects by inhibiting murine sarcoma cell growth. In-vitro studies suggest potential antitumor activity against glioblastoma cell lines, mediated through its inhibition of protein synthesis and activation of Rho. ### Has Narciclasine been studied in human clinical trials? No, current research on Narciclasine is exclusively limited to preclinical animal models and in-vitro cellular studies. There are currently no human clinical trials or published data regarding its effects, safety, efficacy, or optimal dosages in human populations. ### Are there known side effects or drug interactions with Narciclasine? Due to the absence of human clinical trials, the full spectrum of potential side effects, drug interactions, contraindications, or safety during pregnancy or lactation for Narciclasine is unknown. Its potent cellular effects observed in preclinical models suggest a need for extreme caution and further research before any human application. ### What is the current research status of Narciclasine as a potential cancer therapeutic? Narciclasine has demonstrated cytostatic and antitumor activity in preclinical and in-vitro studies, particularly against sarcoma cell lines and glioblastoma cells. However, it remains in early-stage research with no approved clinical applications, and its development as a therapeutic agent depends on further human clinical trials to establish safety and efficacy. Most evidence to date comes from laboratory studies rather than human clinical evidence. ### Who should avoid Narciclasine supplementation, and are there specific populations at higher risk? Due to its potent effects on protein biosynthesis and cytoskeletal organization, Narciclasine is not recommended for pregnant women, nursing mothers, or children without medical supervision and clinical evidence of safety in these populations. Individuals with active cancer undergoing conventional chemotherapy should consult oncologists before use, as the compound's mechanism may interact unpredictably with standard cancer treatments. ### What is the difference between Narciclasine's effects on protein synthesis versus DNA synthesis in cells? Narciclasine inhibits protein biosynthesis significantly more potently than DNA synthesis according to preclinical studies, meaning it primarily disrupts cellular protein production rather than blocking genetic replication. This selective mechanism of action through RhoA GTPase activation and actin polymerization distinguishes it from many conventional cytotoxic agents and may have implications for its therapeutic selectivity. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*