Search Results (225)

The Campanula genus (Campanulaceae) comprises nearly 300 herbaceous species widely distributed across the Northern Hemisphere. Beyond their ornamental value, many species have been traditionally employed to treat inflammatory, respiratory, and cardiovascular disorders. Phytochemical studies have revealed a remarkable diversity of bioactive constituents, including phenolic acids, flavonoids, coumarins, acetylenic compounds, triterpenes, and alkaloids. These metabolites exhibit broad pharmacological activities, such as antioxidant, anti-inflammatory, antimicrobial, cytotoxic, and cardioprotective effects. This review provides a comprehensive overview of the isolated compounds from the Campanula species, summarizing their chemical diversity, pharmacological mechanisms, and structure–activity relationships. It also highlights underexplored species and compound classes with potential therapeutic significance. By integrating the phytochemical evidence with pharmacological insights, this work underscores the value of the Campanula species as promising natural resources for future drug discovery and development. Full article

Hymenaea spp. (Fabaceae) are widely used in folk medicine to treat fatigue, inflammation, respiratory, and gastrointestinal disorders. However, comprehensive evidence-based evaluations of their pharmacological potential remain limited. This systematic review brought together the existing pharmacological and phytochemical evidence on the significant therapeutic potential of Hymenaea spp. A total of 17 studies were included; phytochemical analyses identified flavonoids, triterpenes, procyanidins, xyloglucans, and caryophyllene oxide among the major bioactive constituents. The reported biological activities were primarily anti-inflammatory, antioxidant, immunomodulatory, antimicrobial, and antiproliferative. Mechanistic findings consistently substantiated anti-inflammatory evidence through COX/LOX inhibition, cytokines, and redox-related modulations. Despite these promising results, the molecular mechanisms and translational evidence remain poorly defined. In conclusion, Hymenaea spp. exhibit significant pharmacological potential. Future studies integrating metabolomics and preclinical and clinical validation are essential to translating traditional knowledge of this species into evidence-based therapeutics. Full article

The tormentil rhizome (Potentilla erecta L.) is traditionally used to treat gastrointestinal and inflammatory disorders, yet the mechanisms underlying its immunomodulatory activity remain unclear. No studies have examined the metabolism of tormentil constituents by the human gut microbiota and their effects on innate immune cells. This study evaluated the effects of the ethanolic extract of tormentil rhizome (EtTR) and its gut microbiota-derived metabolites (TRGMs) on innate immune function using human neutrophils and THP-1-derived macrophages. The chemical composition of EtTR and TRGMs was characterized by LC-MS, revealing fractions enriched in catechins and procyanidins (30% MeOH) or ellagic acid derivatives and triterpenes (100% MeOH). EtTR and all TRGM fractions significantly reduced ROS production, while the extract and selected metabolites decreased IL-1β and TNF-α secretion in neutrophils, whereas IL-8 showed marked induction. In macrophages, EtTR and selected fractions suppressed TNF-α and MCP-1 release but variably affected IL-6, reflecting donor-dependent modulation. The strongest inhibition was observed for fractions rich in catechins and triterpenoid conjugates, indicating synergistic activity between these compound classes. Overall, EtTR and its microbiota-derived metabolites exerted complementary antioxidant and immunomodulatory effects, providing mechanistic evidence that microbial transformation of tormentil polyphenols yields bioactive postbiotic metabolites capable of modulating inflammatory signaling. Full article

The Mediterranean ecosystem is characterized by marked seasonality; it is composed of species such as shrublands that are subjected to high levels of water and thermal stress, making these species an important source of secondary metabolites of significant chemical and ecological interest. In this work, 21 plants were selected from the Mediterranean scrub. These abundant and characteristic representations of the ecosystem produce a total of 197 terpenes. The majority of these are monoterpenes (46.70%), followed by sesquiterpenes (38.07%), with a minority of diterpenes (5.53%) and triterpenes (10.15%). Tetraterpenes accounted for only 0.5% of the total compounds in the species studied, corresponding to only 1%. The major terpenes include 1,8-cineole, terpinen-4-ol, α-terpineol, borneol, camphor, γ-terpinene, limonene, linalool, o-cymene, α-tujene, α-pinene, β-pinene, sabinene, myrcene, β-phellandrene, and β-caryopylene. Species such as Pistacea terebinthus, Rosmarinus officinalis, Cistus ladanifer, Myrtus communis, Lavandula stoecha, and Thymus mastichina contain the most terpenic compounds in their chemical composition. Furthermore, these metabolites are involved in various biological functions, including antimicrobial, antioxidant, neuroprotective, antibacterial, cardiovascular, analgesic, antitumor, and insecticidal activities, among others. Various terpenes present in Mediterranean scrub species, such as 1,8-cineole, α-pinene, limonene, borneol, and terpinen-4-ol, have demonstrated synergistic effects that enhance their antimicrobial, insecticidal, and neuroprotective properties. These interactions between compounds make the natural extracts more effective than they would be individually, increasing their therapeutic and biotechnological value. The synergism among terpenes suggests a promising approach for developing more effective and sustainable phytotherapeutic products. Full article

Background/Objectives: Olive leaf (Olea europaea L.), a by-product of olive oil production, is rich in bioactive phenolics but limited in application due to poor solubility and stability. To improve their bioavailability, this study presents a comparative encapsulation strategy using three phospholipid-based liposomal systems (AL, PG90, and PH90) loaded with ethanolic olive leaf extract. Methods: Liposomes were characterized by physicochemical parameters, encapsulation efficiency (EE), antioxidant activity, morphology, release kinetics under simulated physiological conditions, and 60-day stability. To the best of our knowledge, this is the first direct comparison of AL, PG90, and PH90 matrices for olive leaf extract encapsulation. Results: HPLC and GC-MS confirmed successful encapsulation, with oleuropein showing the highest EE (up to 76.18%). PH90 favored retention of non-polar triterpenes, while AL and PG90 preferentially encapsulated polar flavonoid glycosides. FT-IR analysis verified extract integration into phospholipid bilayers. Antioxidant activity remained high in all loaded formulations, with negligible activity in empty liposomes. Extract-loaded systems exhibited reduced particle size, higher viscosity, and more negative electrophoretic mobility, enhancing colloidal stability. PG90 liposomes displayed the most stable mobility profile over 60 days. Transmission electron microscopy and nanoparticle tracking analysis revealed formulation-dependent vesicle morphology and concentration profiles. Release studies demonstrated significantly prolonged polyphenol diffusion from PG90 liposomes compared to the free extract. Conclusions: Phospholipid composition critically governs encapsulation selectivity, stability, and release behavior. Tailored liposomal systems offer a promising strategy to enhance the stability and delivery of olive leaf polyphenols, supporting their application in bioactive delivery platforms. Full article

In response to the increasing interest in medicinal plants, researchers have called for the investigation of underexplored, widely distributed species, such as those within the Camellia genus. Camellia japonica L., though not native to Galicia (NW Spain), is widely cultivated there, primarily for ornamental purposes. Recent phytochemical analyses of C. japonica leaves have identified a variety of bioactive compounds, with phenolic compounds being the most abundant, along with carotenoids, terpenoids and fatty acids. These molecules exhibit a range of biological activities, including antioxidant, antimicrobial, anti-inflammatory, and anticancer effects. Nonetheless, certain constituents, such as saponins, triterpenes, and tannins, may exhibit anti-nutritional or mild toxic effects under specific conditions. This review specifically examines the bioactive compounds found in C. japonica leaves and their associated health benefits. Furthermore, it underscores the need for innovative approaches to develop sustainable industrial processes for utilizing C. japonica leaves, with potential applications in the food, pharmaceutical, and cosmetic industries. Full article

Prunella vulgaris L. (PV) is a versatile plant with medicinal and culinary applications globally. Its mature fruit-spikes (red-brown) are the primary source of traditional medicine and herbal tea. However, large-scale cultivation and harvesting inevitably leads to the unintended inclusion of immature green fruit-spikes, which are considered substandard medicinal parts. To explore the medicinal and nutraceutical potential of green fruit-spikes, our study systematically compared green and red-brown samples. The distinctions between the two fruit-spikes were characterized by determination of total water-soluble extract content, comprehensive chemical difference analysis, and quantitation of six phenolic acids, including Danshensu, caffeic acid, protocatechuic acid, protocatechualdehyde, salviaflaside, and rosmarinic acid. Additionally, variations in antioxidant activity were evaluated by DPPH and ABTS assays. As a result, 106 compounds were identified from the PV samples. Green spikes exhibited higher total water extract yield and contents of the six phenolic acids than the red-brown ones. Moreover, green samples showed greater accumulations of phenolic acids, flavonoids, and triterpenes. Concomitantly, stronger antioxidant activity was displayed in green spikes in both assay models. Caffeic acid, danshensu, rosmarinic acid, and protocatechualdehyde were identified as major contributors by Pearson correlation analysis. Our findings reveal that green fruit-spikes possess advantages in accumulating specific chemical profiles and exhibiting antioxidant activity, highlighting their untapped pharmaceutical and nutraceutical potential. Full article

Kalanchoe pinnata, commonly known as the “miracle plant” or “life plant”, is a succulent species traditionally used for various health conditions. Recent research investigations have intensified interest in this species due to its diverse repertoire of bioactive constituents, including flavonoids, alkaloids, triterpenes, and glycosides. These compounds have been associated with multiple therapeutic effects, notably antioxidant, anti-inflammatory, and antidiabetic activities. Although several studies have highlighted the positive effects of the extracts of K. pinnata on key factors contributing to the pathophysiology and complications of diabetes mellitus, a systematic overview focusing on the use of these extracts and their bioactive constituents in the management of the disease is lacking. This literature review summarizes the phytochemical composition, traditional uses, and recent scientific data supporting the antidiabetic potential of K. pinnata, with a particular focus on its effects on glycemic control, as well as inflammatory and oxidative homeostasis, toxicity, safety, and potential clinical implications. The phytochemical constituents discussed include quercetin, kaempferol, apigenin, epigallocatechin gallate (EGCG), avicularin, and bufadienolides, along with a presentation of representative structures. The review also covers the potential mechanisms of action in diabetes mellitus. The survey of available literature highlights the effects of K. pinnata on indices of diabetes mellitus, including enhancing insulin sensitivity, mitigating oxidative stress and inflammation, lowering blood glucose levels, and the potential adverse effects. These results point to the promising prospect for K. pinnata use in the management of diabetes mellitus and its associated complications, while underscoring the need for more rigorous investigations, including well-controlled clinical trials. Full article

Almond hulls and shells, the byproducts of the almond industry, were analyzed to assess their potential valorization pathways. Shells showed a higher content in lignin and polysaccharides, but very low levels of extractives and inorganics. Hull’s high polar extractives fraction showed poor phenolic preponderance and antioxidant activity, but high sugar and mineral contents, and its lipophilic extracts were highly enriched in triterpenes (from 73.5% to 91.3%), while shells presented more fatty acids (27.4% to 34.2%) and sterols (17.4% to 29.1%). Shells exhibited much higher S/G ratio (syringyl to guaiacyl units) in their lignin polymer (1.0 to 1.4), compared to hulls (0.5 to 0.6). After mineral analyses, hulls showed high amounts of potassium (3.7–4.9%). Fixed carbon content was similar for both materials, but shells showed a higher energetic content, ~20 MJ/kg. Finally, both hulls and pellets increased the water holding capacity (WHC) of the soil by 50%, when added in weight percentages of 6.25% (hulls) and 25% (pellets). With these results, the range of possibilities for these waste materials is exciting: shells could be used to obtain hemicellulose oligosaccharides, while hulls could be used in sugar extraction for biotransformation or as a soil amendment. Full article

Erica spiculifolia Salisb. (Balkan heath) is an evergreen shrub growing in the mountain shrublands of Eastern Europe. E. spiculifolia was used as a diuretic, anti-inflammatory, and antioxidant herbal remedy. The present study aims to conduct an evaluation of the phytochemical composition and antitumor activity of the methanol–aqueous extract from E. spiculifolia aerial parts to explore its potential in cancer treatment. Overall, a total of 54 secondary metabolites, including 28 hydroxybenzoic, hydroxycinnamic acids, and phenolic glycosides, and 10 triterpene acids, together with 17 flavonoids, were identified or annotated in the assayed E. spiculifolia extract using liquid chromatography-high-resolution mass spectrometry. The cytotoxic activity of the extract, alongside gallic, protocatechuic, and oleanolic acids as its constituents, was screened against a panel of malignant human cell lines of different origin (LAMA-84, HL-60, MDA-MB-231, MCF-7, and CASKI). The most prominent antiproliferative effect of the studied extract (with IC₅₀ 16.6 μg/mL), matched with the highest tumor selectivity (SI > 120), was observed in the LAMA-84 myeloid cells. These findings were further supported by gallic and oleanolic acid (IC₅₀ 6.2 and 1.7 μg/mL, respectively), accounting for a more distinct cytotoxicity. The strongest selective antineoplastic activity was achieved towards the triple-negative breast carcinoma cell line MDA-MB-231, with an IC₅₀ of 32.5 μg/mL. This study provided compelling evidence for a wide spectrum of E. spiculifolia antitumor activity, indicating its potential as a natural alternative for future therapeutic applications. Full article

Camellia oleifera, a member of the Theaceae family and belonging to the Camellia Linn species, is a plant utilized for edible oil production and medicinal value. Its fruit is abundant in various bioactive compounds, including triterpene saponins, flavonoids, lignans, fatty acids, sterols, polysaccharides, and numerous other chemical constituents. Among these, triterpene saponins and flavonoids serve as the primary active ingredients. The pharmacological effects of C. oleifera fruits are diverse, encompassing anti-tumor properties, cardiovascular and cerebrovascular protection, anti-inflammatory, antioxidant activity, lipid-lowering capability, anti-fungal property, and neuroprotective function. In recent years, this area has garnered significant attention from scholars both domestically and internationally. This article reviews the chemical constituents and pharmacological effects of C. oleifera fruits, aiming to provide a comprehensive reference for further research and development. Additionally, it offers a scientific foundation and innovative insights for clinical applications and the identification of relevant bioactive components. Full article

γ-Oryzanol is a complex mixture of ferulic acid esters of phytosterols and triterpene alcohols predominantly found in rice bran. It exhibits a wide range of biological activities, including antioxidant, anti-inflammatory, and lipid-lowering effects, as well as the ability to modulate cellular metabolic pathways in both in vitro and in vivo models. The composition and concentration of γ-oryzanol vary significantly among rice varieties and are influenced by genetic, environmental, and technological factors. Advances in extraction methods, including traditional solvent extraction and innovative approaches such as supercritical fluid extraction, have improved yield and purity, supporting its use in functional foods, nutraceuticals, and cosmetics. Current research in the biological, biomedical, and cosmetic fields is actively investigating γ-oryzanol’s mechanisms of action in metabolic regulation and inflammation, as well as developing advanced formulation strategies to enhance its antioxidant, skin-protective, and functional properties. These efforts aim to optimize its delivery and efficacy by addressing challenges related to poor water solubility and bioavailability, thereby expanding its role as a multifunctional bioactive compound. This review provides a comprehensive overview on γ-oryzanol, focusing on its extraction techniques, chemical characterization, and biological/pharmacological activities. Additionally, clinical trials investigating its efficacy and safety have been thoroughly dissected, offering valuable insights into its therapeutic potential in human populations. Full article

Perovskia atriplicifolia Benth., a perennial aromatic plant widespread in Iran’s Sistan and Baluchestan region, is known for its essential oil composition, rich in aromatic and non-aromatic sesquiterpenes. To the best of our knowledge, limited information exists on the composition of its non-volatile extracts. Herein, the phytochemical investigation of the EtOH extract of P. atriplicifolia aerial parts was performed, guided by an analytical approach based on LC-(-)ESI/QExactive/MS/MS. This led to the identification of phenolics, flavonoids, diterpenes (mainly carnosic acid derivatives), and triterpenes. Structural elucidation was performed via NMR and HRMSMS analysis. Furthermore, considering the occurrence of diterpenes closely related to carnosic acid and carnosol, known for their antioxidant properties, the antioxidant activity of the extract (0.5–5.0 μg/mL) and selected pure compounds (0.5–25 μM; compounds 5, 7, 9, 10, 12, 16) was evaluated in Caco-2 intestinal cells, showing significant reduction in free radical levels. The quantitative results highlighted that the above cited compounds occurred in concentrations ranging from 1.73 to 520.21 mg/100 g aerial parts, with carnosol (12) exhibiting the highest concentration (520.21 mg/100 g aerial parts), followed by 1α-hydroxydemethylsalvicanol (9) (91.73 mg/100 g aerial parts) and carnosic acid (16) (88.16 mg/100 g aerial parts). Full article

Background: Avicennia marina (Forsk.) Vierh., a widely distributed mangrove species, is known for its diverse secondary metabolites with potential pharmacological applications. Despite its dominance in the Arabian Gulf, where A. marina may have adapted to extreme environmental conditions with a distinct set of bioactive molecules, research in this region remains limited. Methods: This study investigates the phytochemical composition, antioxidant activity, and in vitro cytotoxicity of extracts from different plant parts, including roots, leaves, propagules, pericarps, and cotyledons, collected in the United Arab Emirates (UAE). Extracts were analyzed using ultra-pressure liquid chromatography coupled with high-resolution mass spectrometry (UPLC-HRMS). Antioxidant activity was assessed using DPPH and ABTS assays, while cytotoxicity was evaluated against human cancer and normal cell lines. Results: Analysis revealed 49 compounds, including iridoid glycosides, hydroxycinnamic acids, phenylethanoid glycosides, flavonoid glycosides, and triterpene saponins, several reported for the first time in A. marina and mangroves. The pericarp and root extracts exhibited the highest scavenging activity (DPPH: 187.14 ± 2.87 and 128.25 ± 1.12; ABTS: 217.16 ± 2.67 and 147.21 ± 2.42 μmol TE/g, respectively), correlating with phenylethanoid content. The root extract also displayed the highest cytotoxicity, with IC₅₀ values of 58.46, 81.98, and 108.10 μg/mL against MDA-MB-231, SW480, and E705, respectively. In silico analysis identified triterpene saponins as potential contributors. Conclusions: These findings highlight the root extract of A. marina as a promising source of bioactive compounds with potential antioxidant and anticancer applications, supporting further exploration for novel therapeutic candidates. Full article

Amelanchier Medik. (Rosaceae) is a genus of perennial, deciduous shrubs and trees distributed across temperate and boreal regions of the Northern Hemisphere. Traditionally, Native American communities used fruits, leaves, bark, and roots to treat digestive ailments, fevers, colds, inflammation, and to promote general well-being. Scientific investigation began with molecular studies in 1946 and phytochemical research in 1978, with research activity on some Amelanchier species increasing substantially between 2010 and 2025. Fruits are rich in phenolic compounds—particularly flavonoids and anthocyanins—along with triterpenes, carotenoids, vitamins, and minerals. Pharmacological studies of selected species report antioxidant, anti-inflammatory, anticancer, antidiabetic, antibacterial, and antiviral activities. Despite extensive chemical profiling in several members of the genus, the biological and toxicological properties of Amelanchier remain insufficiently explored, and clinical evidence is lacking. This review synthesizes recent findings on the phytochemistry, medicinal applications, and biological effects of Amelanchier species, linking traditional knowledge with modern research and highlighting priorities for future biomedical investigation. Full article