Sophoridine

Sophoridine is a quinolizidine alkaloid derived primarily from Sophora alopecuroides and related leguminous plants, structurally related to matrine. It exerts its primary effects through modulation of apoptotic pathways, suppression of NF-κB signaling, and inhibition of tumor cell proliferation, as demonstrated in preclinical models.

Origin & History

Sophoridine is a quinolizidine alkaloid isolated from the traditional Chinese medicinal plants Sophora alopecuroides and Euchresta japonica. It is typically extracted as a white to light yellow powder through standard alkaloid isolation methods.

Historical & Cultural Context

Sophoridine is derived from plants used in Traditional Chinese Medicine, such as Sophora alopecuroides. However, specific historical uses for sophoridine itself, as opposed to the plants, are not documented.

Health Benefits

• Anti-tumor effects in colon cancer models, as shown in preclinical studies (evidence from Liang et al. 2012a and Wang et al. 2019).
• Anti-proliferative effects observed in vitro, though human studies are lacking.
• Neuroprotective effects suggested by preclinical data.
• Anti-inflammatory properties indicated in laboratory settings.
• Induction of apoptosis in colorectal carcinoma cells, based on in vitro studies.

How It Works

Sophoridine induces apoptosis in cancer cell lines by upregulating pro-apoptotic proteins such as Bax and downregulating anti-apoptotic Bcl-2, while also activating caspase-3 and caspase-9 cascades. It suppresses the NF-κB signaling pathway, reducing downstream transcription of pro-inflammatory cytokines including TNF-α and IL-6. Additionally, sophoridine has been shown to inhibit STAT3 phosphorylation and arrest cell cycle progression at the G0/G1 phase, contributing to its anti-proliferative activity in colon cancer models.

Scientific Research

No human clinical trials or meta-analyses for sophoridine have been identified. The evidence is limited to preclinical in vitro and in vivo studies, focusing on its effects in colon cancer models.

Clinical Summary

The majority of evidence supporting sophoridine's health effects comes from in vitro cell-line studies and rodent models, including work by Liang et al. (2012) and Wang et al. (2019) demonstrating anti-tumor activity in colon cancer models. No large-scale randomized controlled human trials have been published as of current literature, making it impossible to confirm effective dosages or clinical outcomes in humans. Animal studies have reported neuroprotective effects at doses in the range of 10–40 mg/kg in rodents, but direct extrapolation to human dosing remains speculative. The overall evidence base is preliminary, and sophoridine should not be considered a clinically validated therapeutic agent at this time.

Nutritional Profile

Sophoridine is a pure alkaloid compound (matrine-type quinolizidine alkaloid), not a food ingredient, and therefore has no conventional nutritional profile in terms of macronutrients, micronutrients, vitamins, minerals, or fiber. Molecular formula: C15H24N2O, molecular weight: 248.36 g/mol. It is a bicyclic alkaloid structurally isomeric with matrine, isolated primarily from Sophora flavescens (Ku Shen), Sophora alopecuroides, and related Sophora species. Bioactive compound concentration in plant sources: sophoridine content in Sophora alopecuroides seeds is approximately 0.1–0.8% dry weight depending on species and extraction method. As a purified compound used in research and traditional medicine contexts, it contains no caloric value, no protein, no lipids, no carbohydrates, and no fiber. Bioavailability notes: sophoridine demonstrates moderate oral bioavailability in preclinical models; it crosses the blood-brain barrier (supporting observed neuroprotective data), undergoes hepatic metabolism primarily via CYP enzymes, and has a reported half-life of approximately 2–4 hours in rodent models. Aqueous solubility is limited, which affects formulation bioavailability. No human pharmacokinetic data with precise bioavailability percentages is currently established in peer-reviewed literature.

Preparation & Dosage

No clinically studied dosage ranges for sophoridine are available. Preclinical studies used various concentrations such as 0.8 mg/mL (in vitro) and 15-25 mg/kg (in vivo mouse). Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Curcumin, Resveratrol, Green Tea Extract, Quercetin, Ashwagandha

Safety & Interactions

Sophoridine shares structural and pharmacological similarities with matrine and oxymatrine, and animal toxicity studies suggest hepatotoxic potential at higher doses, warranting caution in individuals with pre-existing liver conditions. No well-documented human drug interaction studies exist, but theoretical interactions with CYP450-metabolized drugs, anticoagulants, and immunosuppressants cannot be ruled out given its NF-κB and cytokine-modulating activity. Sophoridine is contraindicated in pregnancy based on preclinical data suggesting potential embryotoxicity observed in animal models. Due to the absence of robust human safety data, use by pregnant or breastfeeding individuals, children, or those on chronic medications is strongly discouraged without medical supervision.