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| Black hellebore is a perennial herb with a shallow rhizome blossoming during winter. Most often used with mistletoe. Helleborus niger extracts – Christmas Rose — Helleborus niger L. extracts are botanical preparations derived from the Christmas rose or black hellebore, a Ranunculaceae perennial native to parts of Europe. They are complex phytopharmaceutical mixtures rather than a single defined drug and may contain protoanemonin/ranunculin derivatives, steroidal saponins, ecdysteroids, phenolics, and, depending on plant part and preparation, bufadienolide cardiac glycosides such as hellebrin and hellebrigenin. HNE is commonly used as an abbreviation for Helleborus niger extract. Fresh-plant and fermented aqueous preparations have been used in anthroposophic and integrative medicine, including subcutaneous formulations, but H. niger extract is not an established anticancer drug and should not be equated with isolated hellebrin or hellebrigenin. Primary mechanisms (ranked):
Bioavailability / PK relevance: Formal human pharmacokinetic data for standardized Helleborus niger anticancer extracts are essentially absent. Extract composition varies substantially according to plant material and processing, and systemic exposures to individual active constituents after oral or subcutaneous administration are not well characterized. This makes translation from extract concentrations used experimentally to human tissue exposure uncertain. Bufadienolides additionally raise a potential narrow-therapeutic-index concern because Na⁺/K⁺-ATPase inhibition can affect cardiac electrophysiology. In-vitro vs systemic exposure relevance: Most direct anticancer evidence is concentration-driven in vitro. Some experiments with aqueous fermented HNE used approximately 600–1000 µg/mL to produce strong inhibition of tumor-cell migration, concentrations for which equivalent sustained systemic exposure in humans has not been demonstrated. Consequently, whole-extract in-vitro effects should not be interpreted as evidence that comparable antitumor concentrations are achievable clinically. Clinical evidence status: Preclinical. Helleborus niger extracts have demonstrated cytotoxic, pro-apoptotic, antiproliferative, antimigratory, and antiangiogenic activity in laboratory models. Clinical use exists mainly within complementary or anthroposophic medicine, and isolated case reports describe use alongside other therapies, but controlled human oncology trials demonstrating objective anticancer efficacy are lacking. It should therefore be classified as experimental adjunct use rather than an evidence-based cancer treatment. Helleborus niger Cancer-Relevant Mechanisms
P: 0–30 min R: 30 min–3 hr G: >3 hr |
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| In all eukaryotic cells, intracellular Ca2+ levels are maintained at low resting concentrations (approximately 100 nM) by the activity of the major Ca2+ extrusion system, the plasma membrane Ca2+-ATPase (PMCA), which exchanges extracellular protons (H+) for cytosolic Ca2+. Indeed, sustained elevation of [Ca2+]C in the form of overload, saturating all Ca2+-dependent effectors, prolonged decrease in [Ca2+]ER, causing ER stress response, and high [Ca2+]M, inducing mitochondrial permeability transition (MPT), are considered to be pro-death factors. In cancer the Ca2+-handling toolkit undergoes profound remodelling (figure 1) to favour activation of Ca2+-dependent transcription factors, such as the nuclear factor of activated T cells (NFAT), c-Myc, c-Jun, c-Fos that promote hypertrophic growth via induction of the expression of the G1 and G1/S phase transition cyclins (D and E) and associated cyclin-dependent kinases (CDK4 and CDK2). Thus, cancer cells may evade apoptosis through decreasing calcium influx into the cytoplasm. This can be achieved by either downregulation of the expression of plasma membrane Ca2+-permeable ion channels or by reducing the effectiveness of the signalling pathways that activate these channels. Such protective measures would largely diminish the possibility of Ca2+ overload in response to pro-apoptotic stimuli, thereby impairing the effectiveness of mitochondrial and cytoplasmic apoptotic pathways. Voltage-Gated Calcium Channels (VGCCs): Overexpression of VGCCs has been associated with increased tumor growth and metastasis in various cancers, including breast and prostate cancer. Store-Operated Calcium Entry (SOCE): SOCE mechanisms, such as STIM1 and ORAI1, are often upregulated in cancer cells, contributing to enhanced cell survival and proliferation. High intracellular calcium levels are associated with increased cell proliferation and migration, leading to a poorer prognosis. Calcium signaling can also influence hormone receptor status, affecting treatment responses. Increased Ca²⁺ signaling is associated with advanced disease and metastasis. Patients with higher CaSR expression may have a worse prognosis due to enhanced tumor growth and resistance to apoptosis. -Ca2+ is an important regulator of the electric charge distribution of bio-membranes. |
| 7345- | Hne, | A root extract of Helleborus niger possess cytotoxic properties in neuroblastoma cells |
| - | in-vitro, | neuroblastoma, | NXS2 |
Query results interpretion may depend on "conditions" listed in the research papers. Such Conditions may include : -low or high Dose -format for product, such as nano of lipid formations -different cell line effects -synergies with other products -if effect was for normal or cancerous cells
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