Cassane Diterpenoids and Their Biological Activities

Cassane diterpenoids are a subclass of tetracyclic diterpene natural products distinguished by a characteristic 6/6/6/5 carbon framework and diverse substituent patterns. Predominantly isolated from species within the Caesalpiniaceae family, these compounds exhibit a broad spectrum of biological activities, including antimicrobial, anti-inflammatory, anticancer and antiparasitic effects. Structural variations—such as oxidation state, ring fusion and side-chain modifications—play a crucial role in modulating their pharmacological profiles. Recent advances have focused on elucidating structure–activity relationships, developing efficient synthetic and semi-synthetic routes, and probing mechanisms of action at molecular and cellular levels. The global significance of cassane diterpenoids lies in their potential to address challenges such as antibiotic resistance, chronic inflammation and malignant disease, making them attractive leads for drug discovery and agrochemical development.

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Cassane Diterpenoids and Their Biological Activities publication trend

The graph below shows the total number of articles in cassane diterpenoids and their biological activities across all publications each year (not limited to Nature Index journals).

Technical terms

Cassane diterpenoids: A group of natural products with a tetracyclic 6/6/6/5 carbon skeleton, isolated primarily from Caesalpiniaceae, noted for diverse bioactivities.

Minimum inhibitory concentration (MIC): The lowest concentration of an antimicrobial agent that prevents visible growth of a microorganism under defined conditions.

IC₅₀: The concentration of a compound required to inhibit a given biological process or target by 50%, used to assess potency.

LPS-stimulated RAW 264.7 macrophages: A cellular model in which macrophage-like cells are activated by lipopolysaccharide to evaluate anti-inflammatory effects.

Molecular docking: A computational method for predicting the preferred orientation of a small molecule when bound to a target protein, aiding in mechanism-of-action studies.

References

1. Antibacterial Activity of Two New Cassane Diterpenoids from Caesaplinia pulcherrima against Bacillus cereus by Damage to Cell Membrane. International Journal of Molecular Sciences (2023).
2. Synthesis of Tricyclic Pterolobirin H Analogue: Evaluation of Anticancer and Anti-Inflammatory Activities and Molecular Docking Investigations. Molecules (2023).
3. New Cassane Diterpenoids from Caesalpinia sappan and their Antiplasmodial Activity. Molecules (2017).
4. The Genus Caesalpinia L. (Caesalpiniaceae): Phytochemical and Pharmacological Characteristics. Molecules (2012).