Bisdemethoxycurcumin: Properties, Bioactivity & Research Uses

Bisdemethoxycurcumin is a naturally occurring curcuminoid derived from Curcuma longa that lacks both methoxy substituents found in curcumin, conferring distinct physicochemical and bioactive properties of growing interest in inflammation, oxidative stress, and cancer research.

Chemical Name

(1E,6E)-1,7-bis(4-hydroxyphenyl)hepta-1,6-diene-3,5-dione

Molecular Formula

C₂₁H₁₈O₄

Molecular Weight

338.37 g/mol

Source

Minor curcuminoid isolated from Curcuma longa (turmeric) rhizomes

Key Structural Feature

Lacks both methoxy groups present on the aromatic rings of curcumin

SKU

B117979

Chemical Structure and Physicochemical Properties

Bisdemethoxycurcumin (BDMC) is the least-methoxylated member of the three principal curcuminoids found in turmeric (Curcuma longa). While curcumin carries one methoxy group on each of its two para-hydroxyphenyl rings and demethoxycurcumin retains one, BDMC bears no methoxy substituents, presenting two unmodified 4-hydroxyphenyl (para-hydroxyphenyl) aromatic groups flanking a central β-diketone/enol tautomeric linker chain.

Its molecular formula is C₂₁H₁₈O₄ with a molecular weight of approximately 338.37 g/mol. Like other curcuminoids, BDMC exhibits a characteristic extended conjugated π-system responsible for its yellow-orange chromophore and notable UV-Vis absorption in the 350–430 nm range. The compound is sparingly soluble in water but dissolves readily in polar organic solvents such as DMSO, ethanol, and methanol, which are the recommended vehicles for preparing stock solutions in cell-based assays.

The enol tautomer of the central diketone moiety predominates in solution and is considered important for metal-chelating and antioxidant activities. The absence of methoxy groups relative to curcumin reduces steric bulk and alters electron density on the aromatic rings, which may influence receptor binding affinities and metabolic stability.

Biological Activities and Mechanisms of Action

Anti-inflammatory activity: BDMC has been reported to modulate inflammatory signaling pathways, including inhibition of NF-κB activation, a master transcription factor regulating the expression of pro-inflammatory cytokines such as TNF-α, IL-1β, and IL-6. By interfering with the IκB kinase complex and downstream NF-κB nuclear translocation, BDMC may reduce inflammatory gene expression in macrophage and epithelial cell models.

Antioxidant activity: The phenolic hydroxyl groups and the enolized β-diketone system enable BDMC to scavenge reactive oxygen species (ROS) and chelate transition metals that catalyze oxidative reactions. BDMC has demonstrated free-radical scavenging capacity in standard in vitro assays such as DPPH and ABTS, although the absence of methoxy electron-donating groups relative to curcumin may modulate the magnitude of this activity.

Anticancer potential: Research studies have investigated BDMC's ability to induce apoptosis and inhibit proliferation in various cancer cell lines. Proposed mechanisms include modulation of cell cycle regulatory proteins, activation of caspase cascades, and suppression of Akt/mTOR survival signaling. Anti-angiogenic and anti-metastatic effects have also been explored in preclinical models.

Neuroprotective effects: Preliminary studies suggest BDMC may protect neuronal cells from oxidative and inflammatory insults, raising interest in the context of neurodegenerative disease research.

Note: The majority of published evidence is from in vitro or preclinical animal studies. Clinical translation has not been established.

Research Applications and Experimental Considerations

Cell-based assays: BDMC (SKU B117979) is suitable for use in cytotoxicity, apoptosis, and inflammatory signaling studies using mammalian cell culture models. Stock solutions are best prepared in DMSO at concentrations of 10–50 mM and stored at −20 °C protected from light. Final assay DMSO concentrations should be kept ≤0.1% to avoid solvent cytotoxicity artifacts.

Comparative curcuminoid studies: Because natural turmeric extracts contain a mixture of curcumin (~75–80%), demethoxycurcumin (~15–20%), and bisdemethoxycurcumin (~3–5%), use of the isolated pure compound B117979 allows researchers to deconvolute the individual contributions of each curcuminoid to an observed biological effect, enabling rigorous structure-activity relationship (SAR) analyses.

Biochemical assays: BDMC is used in enzyme inhibition assays, protein-binding studies (e.g., with tubulin or Hsp90), and metal-chelation experiments. Its distinct UV-Vis absorption profile facilitates spectrophotometric quantification.

Storage and handling: Store at −20 °C in a tightly sealed container, protected from light and moisture. The compound is stable under recommended storage conditions. For long-term storage, aliquoting stock solutions is advised to minimize freeze-thaw cycles.

Comparison with Curcumin and Demethoxycurcumin

The three curcuminoids differ solely in the number and position of methoxy groups on their aromatic rings. Curcumin bears two methoxy groups (one per ring), demethoxycurcumin retains one, and bisdemethoxycurcumin has none. This progressive demethoxylation affects lipophilicity (logP), metabolic stability, and potentially bioavailability.

Structurally, the electron-donating methoxy groups in curcumin enhance phenolic ring electron density and may strengthen certain antioxidant and enzyme-inhibitory interactions. Conversely, BDMC's simpler aromatic substitution pattern may confer advantages in specific binding contexts or alter metabolic pathways, potentially yielding different in vivo pharmacokinetic profiles.

Some studies have reported that BDMC exhibits comparable or even superior activity to curcumin in select assays — for example, certain apoptosis induction or anti-proliferative endpoints — while being less active in others. However, direct head-to-head quantitative comparisons should be interpreted with caution given variability in experimental conditions across published literature.

Researchers designing curcuminoid SAR studies are encouraged to test all three analogs under identical conditions using individually pure compounds (e.g., Aladdin SKU B117979 for BDMC) to generate internally consistent data.

Frequently asked questions

What is the recommended solvent for dissolving Bisdemethoxycurcumin (B117979)?

Bisdemethoxycurcumin is sparingly soluble in water and is best dissolved in DMSO, ethanol, or methanol to prepare concentrated stock solutions. For cell-based assays, DMSO stocks are most common; ensure the final DMSO concentration in culture medium does not exceed 0.1% to avoid solvent-related cytotoxicity.

How does Bisdemethoxycurcumin differ structurally from curcumin?

Bisdemethoxycurcumin lacks both methoxy groups that are present on the aromatic rings of curcumin. Curcumin has one methoxy substituent on each of its two aromatic rings, whereas BDMC presents unsubstituted 4-hydroxyphenyl groups. This structural difference influences lipophilicity, electron density on the aromatic rings, and potentially biological activity and metabolic fate.

What biological pathways has Bisdemethoxycurcumin been studied for?

BDMC has been investigated for its effects on NF-κB-mediated inflammatory signaling, ROS scavenging and antioxidant pathways, apoptotic cascades (including caspase activation), and Akt/mTOR proliferation/survival signaling. Neuroprotective and anti-angiogenic properties have also been explored. Most evidence is from in vitro and preclinical studies.

Why use isolated Bisdemethoxycurcumin rather than a crude turmeric extract?

Crude turmeric extracts contain a mixture of curcumin, demethoxycurcumin, and bisdemethoxycurcumin at variable ratios, making it impossible to attribute observed effects to a single compound. Using pure BDMC (SKU B117979) enables precise dose–response characterization and rigorous structure-activity relationship studies by isolating the contribution of this specific curcuminoid.

What are the recommended storage conditions for B117979?

Store Bisdemethoxycurcumin at −20 °C in a tightly sealed container, protected from light and moisture. Aliquoting stock solutions prior to long-term storage is recommended to minimize degradation from repeated freeze-thaw cycles.

References

1. Anand P, Kunnumakkara AB, Newman RA, Aggarwal BB. Bioavailability of curcumin: problems and promises. Molecular Pharmaceutics. 2007;4(6):807-818. doi:10.1021/mp700113r
2. Osawa T, Sugiyama Y, Inayoshi M, Kawakishi S. Antioxidative activity of tetrahydrocurcuminoids. Bioscience, Biotechnology, and Biochemistry. 1995;59(9):1609-1612.
3. Sandur SK, Pandey MK, Sung B, et al. Curcumin, demethoxycurcumin, bisdemethoxycurcumin, tetrahydrocurcumin and turmerones differentially regulate anti-inflammatory and anti-proliferative responses through a ROS-independent mechanism. Carcinogenesis. 2007;28(8):1765-1773. doi:10.1093/carcin/bgm123
4. Aggarwal BB, Sundaram C, Malani N, Ichikawa H. Curcumin: the Indian solid gold. Advances in Experimental Medicine and Biology. 2007;595:1-75.

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