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ISSN: 2574 -1241
ISSN: 2574 -1241
Received: March 28, 2025; Published: April 16, 2025
*Corresponding author: Abdol Ghaffar Ebadi, Researcher and Faculty member, Jouybar branch, Islamic Azad University, Jouybar, Iran
DOI: 10.26717/BJSTR.2025.61.009596
Sambucus ebulus, or European elderberry, has been under the limelight due to its potential therapeutic applications in traditional medicine. Recent studies have isolated a series of bioactive compounds in the plant, including flavonoids, phenolic acids, and glycosides, which are accountable for its anti-inflammatory, antioxidant, and anticancer effects. However, despite its potent pharmacological activity, the plant remains under-exploited in modern medicine. The existing review of the phytochemical content of Sambucus ebulus and its clinical significance, particularly in the chronic conditions such as cancer, diabetes, and cardiovascular diseases, is under focus in this mini-review. The review presents the significance of investigating further studies into its potential clinical utility based on its underlying biological effects. The article also emphasizes the need for assessment by forthcoming research on Sambucus ebulus efficacy and safety in human health.
Keywords: Sambucus Ebulus; Phytochemicals; Antioxidant; Anti-Inflammatory; Cancer Therapy
Sambucus ebulus, the European elderberry, has attracted interest in traditional medicine due to its rich composition of bioactive compounds like flavonoids, phenolic acids, and glycosides. Its antioxidant, anti-inflammatory, and anticancer properties have been highlighted in recent studies, foretelling its therapeutic application against cancer, diabetes, and cardiovascular diseases. Despite its promising pharmacological actions, clinical trials regarding its safety, bioavailability, and efficacy in humans are not available. This mini-review summarizes the phytochemical findings and therapeutic potential of S. ebulus thus far, emphasizing the need for further research to authenticate its clinical applications and integrate it into modern medicinal therapeutics.
Sambucus ebulus, dwarf elder, or elderberry, from the family Adoxaceae, is widespread in Europe and in some regions of Asia. It is used in traditional medicine for its various therapeutic effects. Its roots, fruits, and flowers are utilized to treat various ailments, including respiratory problems, gastrointestinal diseases, fever, and inflammation. In the majority of cultures, S. ebulus was employed as a good remedy for flu-like conditions, colds, and even as a mild laxative. The use of elderberry plants, like Sambucus ebulus, is rooted in ancient times, and the proof of its medicinal use can be found in ancient manuscripts across Europe, particularly in countries like Germany, France, and Greece [1]. In addition, elderberry was also imbued with symbolic and sacred significance in European folklore, in which it was thought to protect against evil spirits and disease [2]. The contemporary interest in S. ebulus has resumed with the revival of natural remedies and herbal medicines.
Although eclipsed by its very close relative, Sambucus nigra (black elderberry), S. ebulus is receiving increasing attention for its unique pharmacological profiles and contribution to modern herbal medicine [3]. While traditional uses are well known, scientific research into its bioactive constituents has been relatively slow. This mini-review aims to overview the recent advances in the understanding of the pharmacological effects of Sambucus ebulus, i.e., antioxidant, anti-inflammatory, and anticancer properties. The review will cover the underlying bioactive molecules of these therapeutic effects and the current state of the art of the research. Furthermore, it will highlight the deficiencies and limitations of the research performed thus far and suggest future research lines to advance the understanding and clinical application of S. ebulus (Figure 1).
Figure 1
Medicinal Importance and Bioactive Constituents
Sambucus ebulus is medicinally important because it has a rich phytochemical composition of flavonoids, anthocyanins, tannins, and saponins. These bioactive phytochemicals are believed to be responsible for the diverse pharmacological actions of the plant. S. ebulus is particularly rich in anthocyanins, which have been known to possess antioxidant, anti-inflammatory, and anticancer activities. Research has shown that the plant’s fruit, which is rich in these compounds, can aid in immune system support, cardiovascular health, and inflammation reduction [4]. It has also been established through research that S. ebulus compounds exhibit antibacterial and antiviral activities, an attribute that may account for the traditional use in treating infections and colds [5]. Recent studies have confirmed that these compounds not only aid in antioxidant activities but also exhibit bioactivity in disease models of various types. For instance, S. ebulus flavonoids have been found to be cyclooxygenase (COX) enzyme inhibitors and hence exert an anti-inflammatory action and inhibit the onset of chronic diseases [6]. In addition, anthocyanins which are responsible for the color of the plant are widely studied for their ability to negate oxidative stress, one of the reasons for the onset of chronic diseases such as cancer, diabetes, and cardiovascular diseases based on Table 1 [7]. This table provides a structured overview of how the bioactive compounds in Sambucus ebulus contribute to its medicinal importance and therapeutic potential.
Table 1: Bioactive Constituents and Pharmacological Actions of Sambucus ebulus.
Context: Recent Research on Sambucus ebulus
Despite the historical significance and the promising pharmacological properties of Sambucus ebulus, the majority of the contemporary studies remain at the preliminary level. Many studies have explored the antioxidant and anti-inflammatory activity of the plant in in vitro (test tube) or animal models. However, clinical implementation of such results is scarce. Results of studies on the antioxidant and anti-inflammatory activity of S. ebulus are encouraging but without trials on humans [8]. There is also growing interest in the anticancer potential of Sambucus ebulus because some of the bioactive compounds in the plant were found to induce apoptosis (programmed cell death) in cancer cell lines. In addition, the extract of S. ebulus was found to inhibit the growth of different kinds of cancerous cells, such as breast, colon, and liver cancer cells [9]. However, the molecular mechanisms of action of these effects are not yet well understood, and further research is required.
Gaps in Existing Knowledge and Requirement for Additional Research
While evidence of the therapeutic promise of Sambucus ebulus is mounting, there are several gaps. Most of the research has been preclinical, and there is a significant lack of large human clinical trials to validate these preclinical findings. The scientific community has yet to fully clarify the complex mechanisms through which S. ebulus acts on various biological systems. Additionally, the effective and safe dosage for clinical use is unknown. Deeper research, including pharmacokinetics, clinical trials, and thorough toxicological investigations, is necessary before S. ebulus can be recommended for widespread use in the clinical practice [10]. The full potential of Sambucus ebulus may thus be realized only when future studies are aimed at bridging these gaps, exploring its bioactive compounds in clinical settings, and standardizing its application in therapeutic medicine. Studies on the synergistic effect of S. ebulus with other medicinal plants or drugs may also yield new information on its clinical relevance.
Pharmacological Properties
The multifaceted pharmacological activities of Sambucus ebulus are primarily attributed to its rich phytochemical content, which encompasses flavonoids, anthocyanins, triterpenoids, tannins, and saponins. These bioactive molecules are accountable for the drug action of the plant. Out of these, flavonoids and anthocyanins have been extensively studied for their antioxidant action, which is accountable for the scavenging of reactive oxygen species (ROS) and mitigation of oxidative stress [11]. The antioxidant action of S. ebulus are particularly ascribed to its flavonoid composition because flavonoids are free radical scavengers that assist cells in protecting themselves from oxidative damage and the threat of acquiring chronic ailments such as cardiovascular diseases, neurodegenerative diseases, and cancer [12]. Anthocyanins, responsible for the dark color of S. ebulus fruits, are among the most significant contributors to its pharmacological activity. The compounds have potent anti-inflammatory and anticancer activities via modulation of inflammatory pathways and induction of apoptosis in cancer cells [13]. Moreover, triterpenoids and saponins present in S. ebulus exhibited antimicrobial and immunomodulatory activities, justifying the traditional application of the plant in treating infection and immune disorders [14]. Research has also indicated the potential of S. ebulus extracts in inhibiting lipid peroxidation, a vital component of preventing cellular damage by oxidative stress [15]. Anti-inflammatory activity is also substantiated by evidence from a study demonstrating that flavonoids present in S. ebulus are cyclooxygenase (COX) inhibitors, in particular COX-2, for chronic inflammatory conditions such as rheumatoid arthritis and inflammatory bowel disease [16].
Table 2 illustrates the key bioactive compounds present in Sambucus ebulus and their associated pharmacological properties. It highlights their mechanisms of action, such as antioxidant, anti-inflammatory, anticancer, and antimicrobial effects, supported by relevant scientific references. This information underscores the therapeutic potential of Sambucus ebulus for various diseases. Figure 2 provides data on the antioxidant and anti-inflammatory activities of key bioactive compounds found in Sambucus ebulus. Anthocyanins and flavonoids exhibit the highest activity in both categories, making them the most significant contributors to the plant’s therapeutic potential. This data can be used to visualize the comparative potency of different compounds in a bar or line graph.
Table 2: Bioactive Compounds and Pharmacological Properties of Sambucus ebulus.
Figure 2
Therapeutic Applications
Several in vitro and in vivo studies have shown that S. ebulus extracts are therapeutically beneficial for the management of a range of chronic diseases. The most promising area of research is its use in cancer prevention and therapy. Studies have shown that S. ebulus extracts can induce apoptosis and inhibit the growth of a range of cancer cell lines, including breast, colon, and liver cancer cells. The anticancer effect is largely attributed to anthocyanins and flavonoids, which act on crucial signaling pathways in cell cycle regulation and apoptosis [17]. Although the preclinical findings are promising, however, the mechanisms of action remain unclear and thus need to be investigated further. Besides its anticancer effect, S. ebulus is reported to demonstrate useful activities on metabolic disorders such as diabetes. The bioactive compounds of the plant guarantee to control blood sugar by enhancing the sensitivity of insulin and inhibiting carbohydrate breakdown enzymes such as α-amylase and α-glucosidase [18].
This holds promise in the development of phytotherapy on the management of diabetes. The cardiovascular properties of S. ebulus are also of interest. The flavonoids and anthocyanins were shown to increase endothelial function, reduce blood pressure, and suppress the oxidation of low-density lipoprotein (LDL), a significant cause of atherosclerosis formation [19]. The anti-inflammatory action of the plant is also of importance for cardiovascular health in that it reduces the levels of pro-inflammatory cytokines implicated in heart disease. The plant has also been used traditionally due to its antiviral and antimicrobial activity, and its effectiveness against numerous bacterial and viral pathogens has been established through scientific research. For instance, extracts of S. ebulus have exhibited antibacterial activity against Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa, justifying its use traditionally in the healing of wounds and infections [20]. Similarly, its antiviral properties have been examined as a remedy against respiratory infection with some studies revealing that it has inhibitory activity against influenza viruses [21].
Current Gaps and Challenges
Although S. ebulus has shown promising pharmacological activity and therapeutic potential, there are still some major shortcomings in the existing research that prevent its clinical use. The foremost of these is the absence of human clinical trials. The majority of the existing research has been performed in vitro or in animal models, and although they offer valuable information regarding the bioactivity of S. ebulus, their results cannot be directly applied to human health without additional verification [22]. A second challenge is standardization of S. ebulus extracts. The chemical composition of bioactive compounds in the plant can vary with environmental conditions, harvest time, and extraction methods, and it is difficult to formulate a consistent therapeutic product [23]. This heterogeneity emphasizes the need for extensive phytochemical characterization and development of standardized extraction protocols to ensure reproducibility in clinical trials. Furthermore, the safety profile of S. ebulus is not yet well examined.
As much as traditional use would suggest that the plant in general is safe, there have been some reports of toxicity at higher doses, particularly by the cyanogenic glycosides present in some parts of the plant [24]. More toxicological investigations need to be carried out to determine safe ranges of dosage and potential side effects, particularly for long-term use. Future research must conduct well-designed clinical trials to evaluate the efficacy, safety, and pharmacokinetics of S. ebulus in human subjects. More research on its synergistic activities with other medicinal plants or pharmaceutical agents could unveil new therapeutic potentials. Clarification of the molecular mechanisms of its bioactivity will also be important in advancing S. ebulus from traditional medicine to evidence-based clinical practice.
In general, Sambucus ebulus is a phytotherapeutically valuable plant with a rich variety of bioactive molecules like flavonoids, anthocyanins, tannins, and saponins that give it antioxidant, anti-inflammatory, anticancer, and antimicrobial activity. The traditional use of S. ebulus by practitioners to cure infection, inflammation, and chronic disease is increasingly supplemented by modern science, but these results have not been well translated into clinic due to insufficient numbers of properly designed human trials. While in vitro and animal experiments have demonstrated promising pharmacological activity, further studies are required to delineate the specific mechanisms of action, identify standardized dosages, and confirm safety and efficacy under clinical conditions. Research in the future must focus on filling the gap between conventional medicine and novel applications, with especial interest in pharmacokinetics, toxicology studies, and synergistic interactions with other components of medicines. Through these research gaps, Sambucus ebulus would become an excellent natural medicine of high promise to modern medicine.
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