acteoside and Inflammation

acteoside has been researched along with Inflammation* in 17 studies

Reviews

1 review(s) available for acteoside and Inflammation

ArticleYear
Human disorders associated with inflammation and the evolving role of natural products to overcome.
    European journal of medicinal chemistry, 2019, Oct-01, Volume: 179

    Inflammation is a biological function which triggered after the mechanical tissue disruption or from the responses by the incidence of physical, chemical or biological negotiator in body. These responses are essential act provided by the immune system during infection and tissue injury to maintain normal tissue homeostasis. Inflammation is a quite complicated process at molecular level with the involvement of several proinflammatory expressions. Several health problems are associated with prolonged inflammation, which effects nearly all major to minor diseases. The molecular and epidemiological studies jagged that the inflammation is closely associated with several disorders with their specific targets. It would be great achievement for human health around the world to overcome on inflammation. Mostly used anti-inflammatory drugs are at high risk of side effects and also expensive. Hence, the plant-based formulations gained a wide acceptance by the public and medical experts to treat it. Due to extensive dispersal, chemical diversity and systematically established biological potentials of natural products have induced renewed awareness as a gifted source for medications. However, today's urgent need to search for cheaper, more potent and safe anti-inflammatory medications to overcome on current situation. The goal of this review to compile an update on inflammation, associated diseases, molecular targets, inflammatory mediators and role of natural products. The entire text concise the involvement of various cytokines in pathogenesis of various human disorders. This assignment discussed about 321 natural products with their promising anti-inflammatory potential discovered during January 2009 to December 2018 with 262 citations.

    Topics: Anti-Inflammatory Agents, Non-Steroidal; Arthritis, Rheumatoid; Biological Products; Cardiovascular Diseases; Humans; Inflammation; Neoplasms; Skin Diseases

2019

Other Studies

16 other study(ies) available for acteoside and Inflammation

ArticleYear
Anti-asthmatic activity of standardized hydro-ethanolic and aqueous extracts of Stachytarpheta cayennensis (Rich.) Vahl in a murine model.
    Journal of ethnopharmacology, 2023, Feb-10, Volume: 302, Issue:Pt A

    Stachytarpheta cayennensis (Verbenaceae) has been used in Brazilian traditional medicine to treat asthma and other respiratory diseases.. To investigate the effects of different doses of standardized hydro-ethanolic (SCH) and aqueous (SCA) extracts of aerial parts of S. cayennensis using a murine ovalbumin (OVA)-induced asthma model.. The major constituents of the plant extracts were identified and standardized by ultra-performance liquid chromatography coupled with mass spectrometry. Balb/c mice were challenged with OVA solution and treated concomitantly by intraperitoneal injection of standardized SCH or SCA extracts at 50, 100, and 200 mg/kg concentrations. OVA-challenged control animals were treated with either dexamethasone (OVA-DEX) or saline solution (OVA-SAL). After challenge, we assessed in vivo bronchial hyperresponsiveness, airway inflammation (number of cells), peribronchial inflammation (histological analysis) and production of OVA-specific IgE and interleukin (IL)-4, IL-5, and IL-13 (ELISA).. Acteoside, isoacteoside, and ipolamiide were the major constituents of SCH and SCA. The respective concentrations of acteoside in SCH and SCA were 78 and 98 μg/mL, while those of ipolamiide were 30 and 19 μg/mL. Treatment with 200 mg/kg of SCH or SCA decreased IL-4, IL-5, and IL-13 in lung homogenates. These reductions were accompanied by a lower influx of inflammatory cells (eosinophils, lymphocytes, and macrophages) to the airways and lungs. In addition to the anti-inflammatory effects, administration of SCA, but not SCH, ameliorated the parameters of bronchial hyperresponsiveness and decreased levels of circulating OVA-specific IgE.. The results presented herein demonstrate for the first time the anti-asthmatic activity of S. cayennensis extracts in a murine model, thereby supporting the ethnopharmacological uses of the plant.

    Topics: Animals; Anti-Asthmatic Agents; Bronchial Hyperreactivity; Bronchoalveolar Lavage Fluid; Cytokines; Disease Models, Animal; Immunoglobulin E; Inflammation; Interleukin-13; Interleukin-5; Lung; Mice; Mice, Inbred BALB C; Ovalbumin; Verbenaceae

2023
Acteoside alleviates UUO-induced inflammation and fibrosis by regulating the HMGN1/TLR4/TREM1 signaling pathway.
    PeerJ, 2023, Volume: 11

    Acteoside (Act), a phenylethanoid compound that was first isolated from mullein, has been widely used for the investigation of anti-inflammatory and anti-fibrotic effect. However, the mechanism of Act against unilateral ureteral obstruction (UUO)-mediated renal injury is largely unknown. Therefore, this study aimed to explore the effects of Act on UUO rats and possible mechanisms.. The results of renal function indexes and histopathological staining showed that Act could improve renal function by reducing serum creatinine, blood urea nitrogen and urine protein at the same time, Act could alleviate renal inflammation and fibrosis. In addition, the results of immunohistochemistry showed that Act could reduce the expression of inflammation and kidney injury-related proteins F4/80, Mcp-1, KIM-1 proteins, as well as the expression of fibrosis-related protein. These data demonstrate that Act can ameliorate UUO-induced renal inflammation and fibrosis in rats probably through triggering HMGN1/TLR4/TREM-1 pathway.

    Topics: Animals; Fibrosis; HMGN1 Protein; Inflammation; Kidney Diseases; Rats; Rats, Sprague-Dawley; Signal Transduction; Toll-Like Receptor 4; Transcription Factors; Triggering Receptor Expressed on Myeloid Cells-1; Ureteral Obstruction

2023
Verbascoside inhibits paraquate-induced pulmonary toxicity via modulating oxidative stress, inflammation, apoptosis and DNA damage in A549 cell.
    Drug and chemical toxicology, 2022, Volume: 45, Issue:5

    Paraquat (PQ), one of the most frequently used herbicides, can cause serious health problems in an exposed individual. In the present study, we investigated the protective effect of verbascoside (VB), a phenylpropanoid glycoside from lemon verbena, against PQ-induced A549 cell injury with a particular focus on the possible molecular pathways involved. A549 cells were exposed to PQ (300

    Topics: A549 Cells; Antioxidants; Apoptosis; DNA Damage; Glucosides; Humans; Inflammation; Interleukin-6; NF-kappa B; Oxidative Stress; Paraquat; Polyphenols; Reactive Oxygen Species; Tumor Necrosis Factor-alpha

2022
Verbascoside protects from LPS-induced septic cardiomyopathy via alleviating cardiac inflammation, oxidative stress and regulating mitochondrial dynamics.
    Ecotoxicology and environmental safety, 2022, Mar-15, Volume: 233

    Verbascoside (VB), as an active component of multiple medicinal plants, has been proved to exert anti-oxidative, anti-aging and neuroprotective effects. This study was designed to investigate whether VB could play a cardioprotective role in septic heart injury.. Mice were injected with lipopolysaccharide (LPS; 10 mg/kg) to induce sepsis. The treatment group received an intraperitoneally injection of VB (20 mg/kg) before LPS challenge. Transthoracic echocardiography, ELISA, immunofluorescence, and qPCR were performed to assess the effect of VB on heart function, oxidative stress, inflammation and apoptosis. Transmission electronic microscopy and immunoblotting were used to evaluate the mitochondrial morphology and biogenesis of the septic heart. In vitro experiments were also performed to repeat above-mentioned assays.. Compared with LPS group, the VB treatment group showed improved cardiac function in sepsis. VB alleviated oxidative stress and inflammatory cell infiltration, as well as cardiomyocyte apoptosis. Specifically, VB could restore sepsis-induced mitochondrial alterations via regulating mitochondrial biogenesis. These results were also confirmed in in vitro experiments.. Verbascoside could protected from sepsis-induced cardiomyopathy by inhibiting oxidative stress, inflammation, and apoptosis, as well as promoting mitochondrial biogenesis.

    Topics: Animals; Apoptosis; Cardiomyopathies; Glucosides; Inflammation; Lipopolysaccharides; Mice; Mitochondrial Dynamics; Oxidative Stress; Phenols

2022
Antibacterial and Anti-inflammatory Activity of Extracts and Major Constituents Derived from Stachytarpheta indica Linn. Leaves and Their Potential Implications for Wound Healing.
    Applied biochemistry and biotechnology, 2022, Volume: 194, Issue:12

    Wounds of various types continue to have a severe socioeconomic impact on the cost of health care. Globally, there has been increased interest surrounding the identification of bioactive compounds that promote or modulate the wound healing process. Stachytarpheta indica Linn. is traditionally used to heal wounds and relieve inflammation; however, the theorised pharmacological properties have not yet been scientifically validated. In this study, dried and ground plant leaves were extracted with water and methanol, which were then subjected to various analyses. The antimicrobial activity of the plant extracts and isolated compounds was determined using well diffusion assays, while the minimum inhibitory concentrations were determined with a colorimetric assay. Morphological changes of human keratinocytes in response to plant extracts were observed with differential interference contrast microscope imaging. Cell viability, proliferation, and migratory effects post-treatment with the plant extracts were also evaluated via colorimetric cytotoxicity assays and a real-time cell analyser protocol. Anti-inflammatory effects of plant extracts and isolated compounds were evaluated by flow cytometry and cyclooxygenase and lipoxygenase enzyme inhibition assays. Three active compounds, i.e. ipolamiide, verbascoside and iso-verbascoside, were isolated from S. indica leaves. Verbascoside demonstrated broad-range antibacterial activity and imposed strong inhibition at 9.77 μg/mL against Staphylococci spp. S. indica extracts (0.1-0.2 mg/mL) were shown to improve human keratinocyte proliferation up to 60% and induce morphological changes by producing cytoplasmic projections at concentrations higher than 0.4 mg/mL. Plant extracts (6.25-100 μg/mL) and individual compounds (3.125-50 μg/mL) elicited strong anti-inflammatory effects by suppressing the expression of interleukin-8 and inhibiting cyclooxygenase-1 and 5-lipoxygenase enzymes. Collectively, these results indicate that plant extracts and isolated compounds derived from S. indica have the potential to inhibit bacterial growth, promote tissue regeneration and reduce inflammation, hence, potentially providing the basis for a novel therapeutic for the treatment of wounds.

    Topics: Anti-Bacterial Agents; Anti-Inflammatory Agents; Humans; Inflammation; Plant Extracts; Plant Leaves; Wound Healing

2022
Acteoside alleviates dextran sulphate sodium‑induced ulcerative colitis via regulation of the HO‑1/HMGB1 signaling pathway.
    Molecular medicine reports, 2022, Volume: 26, Issue:6

    Ulcerative colitis (UC) is a significant burden on human health, and the elucidation of the mechanism by which it develops has potential for the prevention and treatment of UC. It has been reported that acteoside (ACT) exhibits strong anti‑inflammatory activity. In the present study, it was hypothesized that ACT may exert a protective effect against UC. The effects of ACT on inflammation, oxidative stress and apoptosis were evaluated using dextran sulphate sodium (DSS)‑treated mice and DSS‑treated human colorectal adenocarcinoma Caco‑2 cells, which have an epithelial morphology. The results demonstrated that the ACT‑treated mice with DSS‑induced UC exhibited significantly reduced colon inflammation, as demonstrated by a reversal in body weight loss, colon shortening, disease activity index score, inflammation, oxidative stress and colonic barrier dysfunction. Further

    Topics: Animals; Anti-Inflammatory Agents; bcl-2-Associated X Protein; Caco-2 Cells; Caspase 3; Colitis; Colitis, Ulcerative; Dextran Sulfate; Heme Oxygenase-1; HMGB1 Protein; Humans; Inflammation; Mice; Protoporphyrins; Signal Transduction; Tin

2022
Verbascoside Attenuates Acute Inflammatory Injury Caused by an Intracerebral Hemorrhage Through the Suppression of NLRP3.
    Neurochemical research, 2021, Volume: 46, Issue:4

    Intracerebral hemorrhage (ICH) is a devastating cerebrovascular disease with a high mortality rate affecting individuals worldwide. After ICH, persistent inflammation results in the death of brain cells, as well as the promotion of secondary brain injury. Verbascoside (VB), an active component in herbal medicine, possesses antioxidant, anti-inflammatory and neuroprotective properties. Furthermore, previous studies have shown that VB improves recovery of neuronal function after spinal cord injury in rats. In this study, we investigated whether VB limited inflammation induced by ICH through the targeting of NLRP3, which is associated with acute inflammation and apoptosis. Administration of VB reduced neurological impairment and pathological abnormalities associated with ICH, while increasing cell viability of neurons. This was achieved through NLRP3 inhibition and microglial activation. VB treatment decreased neuronal damage when co-cultured with microglia. Furthermore, knockout of NLRP3 eliminated the ability of VB to inhibit inflammation, cell death or protect neurons. Taken together, VB suppressed the inflammatory response following ICH by inhibiting NLRP3.

    Topics: Animals; Anti-Inflammatory Agents; Apoptosis; Cerebral Hemorrhage; Dose-Response Relationship, Drug; Glucosides; Inflammation; Male; Mice, Inbred C57BL; Microglia; Neuroprotective Agents; NLR Family, Pyrin Domain-Containing 3 Protein; Phenols

2021
Verbascoside attenuates acute inflammatory injury in experimental cerebral hemorrhage by suppressing TLR4.
    Biochemical and biophysical research communications, 2019, 11-19, Volume: 519, Issue:4

    Cerebral hemorrhage (ICH) is a common cerebrovascular condition with high mortality, disability and recurrence rates. TLR4-mediated acute inflammatory injury plays a pivotal role in ICH. Verbascoside (VB) is an active component of multiple medicinal plants, and exerts neuroprotective effects in ischemic stroke by targeting the inflammatory response. However, the effects of VB on ICH and the underlying mechanisms remain unclear. In this study, we analyzed the therapeutic effects of VB on acute ICH, and the possible involvement of TLR4-mediated inflammation. VB improved the behavioral score and reduced the hematoma volume, brain edema and neuronal apoptosis in a murine model of acute ICH. Mechanistically, VB attenuated macroglia activation and decreased inflammatory factor levels, which in turn protected the neurons. Furthermore, TLR4 knockout abolished the effects of VB both in vivo and in vitro. Taken together, VB attenuates the symptoms of ICH by targeting the TLR4-mediated acute inflammatory response.

    Topics: Animals; Antioxidants; Apoptosis; Brain Edema; Cerebral Hemorrhage; Disease Models, Animal; Glucosides; Inflammation; Male; Mice, Inbred C57BL; Mice, Knockout; Neurons; Neuroprotective Agents; Phenols; Plants, Medicinal; Toll-Like Receptor 4

2019
Active compounds isolated from Plantago subulata L. via wound healing and antiinflammatory activity guided studies.
    Journal of ethnopharmacology, 2019, Sep-15, Volume: 241

    Topics: Animals; Anti-Inflammatory Agents; Cell Survival; Cells, Cultured; Dinoprostone; Dose-Response Relationship, Drug; Fibroblasts; Glucosides; Hydrogen Peroxide; Inflammation; Lipopolysaccharides; Macrophages; Mice; Nitric Oxide; Phenols; Phytochemicals; Plant Extracts; Plantago; Tumor Necrosis Factor-alpha; Wound Healing

2019
[Inhibitory effects of acteoside on LPS-induced inflammatory response on BV-2 microglial cells].
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2016, Volume: 41, Issue:13

    To investigate the inhibitory effects of acteoside (ACT) on BV-2 microglial cells and the potential mechanism,LPS was used to treat BV-2 cells with or without ACT (12.5,25,50 μmol•L ⁻¹). Then, the expressions of inflammatory factors (NO,TNF-α,IL-6) and inflammation related proteins (iNOS,COX-2,p-IKKβ,IKKβ,p-ⅠκB,ⅠκB) were detected. In addition,the nuclear translocation of NF-κB was explored. The results showed that ACT could significantly suppress the inflammatory response against LPS stimulation by decreasing the expressions of NO,IL-6,TNF-α,iNOS,COX-2 and the phosphorylations of IKKβ and IκB. Moreover,the nuclear translocation of NF-κB p65 was inhibited by ACT. Taken together, ACT could significantly inhibit the inflammatory response of BV-2 microglial cells which were induced by LPS via inhibition of NF-κB signaling pathway.

    Topics: Animals; Anti-Inflammatory Agents; Cell Line; Cyclooxygenase 2; Glucosides; Inflammation; Lipopolysaccharides; Mice; Microglia; Nitric Oxide; Nitric Oxide Synthase Type II; Phenols; Transcription Factor RelA

2016
Verbascoside down-regulates some pro-inflammatory signal transduction pathways by increasing the activity of tyrosine phosphatase SHP-1 in the U937 cell line.
    Journal of cellular and molecular medicine, 2015, Volume: 19, Issue:7

    Polyphenols are the major components of many traditional herbal remedies, which exhibit several beneficial effects including anti-inflammation and antioxidant properties. Src homology region 2 domain-containing phosphatase-1 (SHP-1) is a redox sensitive protein tyrosine phosphatase that negatively influences downstream signalling molecules, such as mitogen-activated protein kinases, thereby inhibiting inflammatory signalling induced by lipopolysaccharide (LPS). Because a role of transforming growth factor β-activated kinase-1 (TAK1) in the upstream regulation of JNK molecule has been well demonstrated, we conjectured that SHP-1 could mediate the anti-inflammatory effect of verbascoside through the regulation of TAK-1/JNK/AP-1 signalling in the U937 cell line. Our results demonstrate that verbascoside increased the phosphorylation of SHP-1, by attenuating the activation of TAK-1/JNK/AP-1 signalling. This leads to a reduction in the expression and activity of both COX and NOS. Moreover, SHP-1 depletion deletes verbascoside inhibitory effects on pro-inflammatory molecules induced by LPS. Our data confirm that SHP-1 plays a critical role in restoring the physiological mechanisms of inducible proteins such as COX2 and iNOS, and that the down-regulation of TAK-1/JNK/AP-1 signalling by targeting SHP-1 should be considered as a new therapeutic strategy for the treatment of inflammatory diseases.

    Topics: Cell Death; Cell Nucleus; Cyclooxygenase 2; Down-Regulation; Enzyme Activation; Gene Silencing; Glucosides; Humans; Inflammation; JNK Mitogen-Activated Protein Kinases; MAP Kinase Kinase Kinases; Molecular Sequence Data; Nitric Oxide Synthase Type II; Phenols; Phosphorylation; Protein Tyrosine Phosphatase, Non-Receptor Type 6; Signal Transduction; Transcription Factor AP-1; Tyrosine; U937 Cells

2015
Activity and stability studies of verbascoside, a novel antioxidant, in dermo-cosmetic and pharmaceutical topical formulations.
    Molecules (Basel, Switzerland), 2011, Aug-18, Volume: 16, Issue:8

    We here report the results of our investigations carried out on verbascoside, a phenylpropanoid glycoside known for its antioxidant, anti-inflammatory and photoprotective actions. Verbascoside was obtained from Buddleia davidii meristematic cells, obtained in turn using a sustainable biotechnology platform which employs an in vitro plant cell culture technology. Verbascoside was first investigated to assess the behaviour of the active ingredient in solution or in finished preparations, in view of its potential topical use, especially in skin protection. Stability studies were performed by HPLC, and a PCL assay was adopted to determine the radical scavenging activity toward superoxide anion. The high hydrophilic character of verbascoside, suggested in a somewhat limited range of possible applications, leading us to explore its derivatization to obtain the semi-synthetic derivative VPP, an acyl derivative of verbascoside, with an improved range of applications due to its lower hydrophilic profile. Alone, VPP revealed increased antioxidant activity, both as an active ingredient and in dermocosmetic preparations. Stability studies showed a greater stability of VPP in lipophilic vehicles, whereas the parent verbascoside proved more stable in an O/W emulsions. Verbascoside was also stable in suppositories, an interesting pharmaceutical form for possible applications in treatment of inflammation of the intestinal mucosa.

    Topics: Administration, Topical; Antioxidants; Buddleja; Chemistry, Pharmaceutical; Chromatography, High Pressure Liquid; Cosmetics; Drug Stability; Emulsions; Excipients; Glucosides; Humans; Hydrophobic and Hydrophilic Interactions; Inflammation; Intestinal Mucosa; Luminescence; Luminescent Measurements; Phenols; Skin; Skin Diseases; Solubility; Superoxides; Suppositories

2011
Microsphere-based flow cytometry protease assays for use in protease activity detection and high-throughput screening.
    Current protocols in cytometry, 2010, Volume: Chapter 13

    This protocol describes microsphere-based protease assays for use in flow cytometry and high-throughput screening. This platform measures a loss of fluorescence from the surface of a microsphere due to the cleavage of an attached fluorescent protease substrate by a suitable protease enzyme. The assay format can be adapted to any site or protein-specific protease of interest and results can be measured in both real time and as endpoint fluorescence assays on a flow cytometer. Endpoint assays are easily adapted to microplate format for flow cytometry high-throughput analysis and inhibitor screening.

    Topics: Animals; Biotinylation; Flow Cytometry; Fluorescence Resonance Energy Transfer; Green Fluorescent Proteins; High-Throughput Screening Assays; Humans; Inflammation; Kinetics; Microspheres; Peptide Hydrolases; Peptides; Reproducibility of Results; Temperature

2010
Antiinflammatory effects in THP-1 cells treated with verbascoside.
    Phytotherapy research : PTR, 2010, Volume: 24, Issue:9

    Verbascum thapsus commonly known as 'mullein' is part of a large family of Scrophulariaceae consisting of more than 360 species. From antiquity Verbascum thapsus has been used as a medicinal herb, it contains diverse polysaccharides, iroid glycosides, flavonoids, saponins, volatile oils and phenylentanoids. Inducible nitric oxide synthase (iNOS) represents one of the three isoforms that produce nitric oxide using L-arginine as a substrate in response to an increase in superoxide anion activated by NF-kB. It is implicated in different pathophysiological events and its expression increases greatly during an inflammatory process, due to oxidative stress and the activation of the enzymes of the antioxidant network such as SOD, CAT and GPx.In this study an inflammatory state was reproduced by treating THP-1 cells (human myelomonocytic leukaemia) with pro-inflammatory stimuli, such as LPS and IFN-gamma, obtaining an up-regulation both in the expression and in the activity of iNOS. The aim of the work was to investigate the antiinflammatory action of verbascoside using a concentration of 100 mum. The results show a significant decrease of the expression and activity of iNOS, extracellular O(2) (-) production, SOD, CAT and GPx activity when the cells were treated with verbascoside. Based on these results it is hypothesized that verbascoside has antiinflammatory properties since it reduces the production of superoxide radicals and consequently reduces the activity of iNOS.

    Topics: Anti-Inflammatory Agents; Antioxidants; Catalase; Cell Line, Tumor; Free Radicals; Glucosides; Glutathione Peroxidase; Humans; Inflammation; Interferon-gamma; Leukemia, Myeloid; Lipopolysaccharides; Nitric Oxide Synthase Type II; Oxidative Stress; Oxygen; Phenols; Plant Components, Aerial; Plant Extracts; Superoxide Dismutase; Up-Regulation; Verbascum

2010
Anti-inflammatory phenylpropanoid glycosides from Clerodendron trichotomum leaves.
    Archives of pharmacal research, 2009, Volume: 32, Issue:1

    The chromatographic separation of MeOH extract from Clerodendron trichotomum Thunberg leaves led to the isolation of three phenylpropanoid compounds. Using spectroscopic methods, the structures of these compounds were determined as beta-(3', 4'-dihydroxyphenyl)ethyl-O-alpha-L-rhamnopyranosyl (1-->3)-beta-D-(4-O-caffeoyl)-glucopyranoside, acteoside (verbascoside) (1), beta-(3', 4'-dihydroxyphenyl)ethyl-O-alpha-L-rhamnopyranosyl (1-->3)-beta-D-(6-O-caffeoyl)-glucopyranoside, isoacteoside (2), beta-(3', 4'-dihydroxyphenyl) ethyl-O-alpha-L-rhamnopyranosyl (1-->3)-beta-D-glucopyranoside, and decaffeoylacteoside (3). We measured the anti-inflammatory activity of these three phenylpropanoid compounds both in vitro (DPPH reduction assay, TBARS assay on Cu (2+)-induced oxidized LDL, PGE(2) assay) and in vivo (acetic acid induced vascular permeability in mice and carrageenan-induced hind paw edema in rats). 80% methanol fraction and acteoside had the activity.

    Topics: Acetic Acid; Animals; Anti-Inflammatory Agents; Biphenyl Compounds; Capillary Permeability; Carrageenan; Catechols; Cell Line; Clerodendrum; Dinoprostone; Disaccharides; Disease Models, Animal; Dose-Response Relationship, Drug; Free Radical Scavengers; Glucosides; Humans; Inflammation; Magnetic Resonance Spectroscopy; Mast Cells; Mice; Molecular Structure; Phenols; Picrates; Plant Leaves; Rats; Thiobarbituric Acid Reactive Substances

2009
Effect of the major glycosides of Harpagophytum procumbens (Devil's Claw) on epidermal cyclooxygenase-2 (COX-2) in vitro.
    Journal of natural products, 2008, Volume: 71, Issue:5

    Harpagophytum procumbens, commonly known as Devil's Claw, is indigenous to southern Africa, and extracts of the tubers have been used for centuries in the treatment of a variety of inflammatory disorders. Its major active components, harpagoside (1), harpagide (2), 8-coumaroylharpagide (3), and verbascoside (4), are believed to interact either synergistically or antagonistically in modulating the enzymes responsible for inducing inflammation, although this has not been probed hitherto. In the current work, the ability of these compounds to inhibit the expression of COX-2 following administration to freshly excised porcine skin has been investigated. An ethanol-soluble extract of H. procumbens tubers and two of the pure compounds tested showed promising activity in Western blotting and immunocytochemical assays, with harpagoside (1) and 8-coumaroylharpagide (3) exhibiting greater reductions in COX-2 expression than verbascoside (4). Harpagide (2) caused a significant increase in the levels of COX-2 expression after 6 h of topical application. The data suggest that the efficacy of H. procumbens is dependent upon the ratios of compounds 1-4 present, which is inconsistent with some current official monograph specifications based solely on harpagoside (1) content.

    Topics: Animals; Anti-Inflammatory Agents, Non-Steroidal; Coumaric Acids; Cyclooxygenase 2 Inhibitors; Epidermis; Glucosides; Glycosides; Harpagophytum; Inflammation; Iridoid Glycosides; Molecular Structure; Phenols; Plants, Medicinal; Pyrans; Swine

2008