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polypodium/krebs
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Seite 1 von 16 Ergebnisse
Oral administration of Polypodium leucotomos delays skin tumor development and increases epidermal p53 expression and the anti-oxidant status of UV-irradiated hairless mice.
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Chronic exposure to ultraviolet radiation (UVR) induces skin tumors in hairless mice. Daily oral administration of a Polypodium leucotomos (PL) extract significantly delayed tumor development in PL-treated versus non-PL-treated mice. UVR and/or PL treatment modified several oxidative stress markers.
Fernblock (Polypodium leucotomos Extract): Molecular Mechanisms and Pleiotropic Effects in Light-Related Skin Conditions, Photoaging and Skin Cancers, a Review.
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Healthier life styles include increased outdoors time practicing sports and walking. This means increased exposure to the sun, leading to higher risk of sunburn, photoaging and skin cancer. In addition to topical barrier products, oral supplementations of various botanicals endowed with antioxidant
An extract of Polypodium leucotomos appears to minimize certain photoaging changes in a hairless albino mouse animal model. A pilot study.
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Chronic ultraviolet B (UVB) exposure of human or murine skin is known to induce cutaneous photoaging and enhanced carcinogenic risk. An extract of Polypodium leucotomos (PL), a tropical fern plant, has been known to exhibit interesting antioxidant and photoprotective properties against acute
Topical or oral administration with an extract of Polypodium leucotomos prevents acute sunburn and psoralen-induced phototoxic reactions as well as depletion of Langerhans cells in human skin.
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Sunburn, immune suppression, photoaging, and skin cancers result from uncontrolled overexposure of human skin to solar ultraviolet radiation (UVR). Preventive measures, including photoprotection, are helpful and can be achieved by topical sunscreening agents. Polypodium leucotomos (PL) has been used
The Role of the Aqueous Extract Polypodium Leucotomos in Photoprotection
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Solar radiation in the ultraviolet (UV), visible (VIS), and infrared (IR) ranges produces different biological effects in humans. Most of these, particularly those derived from ultraviolet radiation (UVR) are harmful to the skin, and include cutaneous aging and increased risk of cutaneous diseases,
Benefits of oral Polypodium Leucotomos extract in MM high-risk patients.
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BACKGROUND
UV radiation and the presence of melanocytic nevi are the main risk factors of sporadic melanoma (MM). Protection of skin by an oral photoprotective agent would have substantial benefits.
OBJECTIVE
We investigated the possible role of an oral Polypodium leucotomos (PL) extract to improve
In vitro studies on the immunomodulating effects of polypodium leucotomos extract on human leukocyte fractions.
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The in vitro effect of Anapsos, a water based extract of the naturally occurring fern Polypodium leucotomos (calagualine), on human leukocyte fractions was investigated. Calagualine inhibited interleukin-2 secretion and concanavalin A (Con A) stimulated proliferation of T-lymphocytes in a
Sun protection in a pill: the photoprotective properties of Polypodium leucotomos extract.
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BACKGROUND
Physical blocks (i.e. wearing appropriate clothing), exposure avoidance, and the use of sunscreens are the main methods of photoprotection currently used. However, phytochemical and natural botanical extracts such as polypodium leucotomos, a tropical fern found in Central and South
Polypodium leucotomos: a potential new photoprotective agent.
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As the understanding of the immune system pathways, cytokine balances, and cellular interactions continues to expand, so must the potential applications of therapies that can impact the process of diseases instead of just controlling their symptoms. In the case of Polypodium leucotomos extract,
Polypodium leucotomos extract decreases UV-induced Cox-2 expression and inflammation, enhances DNA repair, and decreases mutagenesis in hairless mice.
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UV-irradiated skin and UV-induced tumors overexpress the inducible isoform of cyclooxygenase-2 (Cox-2), and Cox-2 inhibition reduces photocarcinogenesis. To evaluate photoprotective effects of Polypodium leucotomos extract (PL), hairless Xpc(+/-) mice were fed for 10 days with PL (300 mg/kg) or
Polypodium leucotomos inhibits ultraviolet B radiation-induced immunosuppression.
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BACKGROUND
An extract of the tropical fern Polypodium leucotomos (PL) administered orally to mice inhibits ultraviolet B (UVB) radiation-induced skin cancer formation. UVB-induced murine skin cancers occur, in part, because of UVB-induced immunosuppression. Thus, we examined whether PL inhibits
Beneficial regulation of matrixmetalloproteinases and their inhibitors, fibrillar collagens and transforming growth factor-beta by Polypodium leucotomos, directly or in dermal fibroblasts, ultraviolet radiated fibroblasts, and melanoma cells.
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The extracellular matrix (ECM) that gives tissue its structural integrity is remodeled in skin aging/photoaging and cancer via the increased expression/activities of matrixmetalloproteinases (MMP), inhibition of the tissue inhibitors of matrix metalloproteinases (TIMP), or inhibition of collagen
A Polypodium leucotomos extract inhibits solar-simulated radiation-induced TNF-alpha and iNOS expression, transcriptional activation and apoptosis.
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In this report, we have examined the molecular basis of the photoprotective effect of a hydrophilic extract of the fern Polypodium leucotomos (PL) in vitro, using a solar simulator as the source of UV radiation (SSR). We found that pretreatment of human keratinocytes with PL inhibited SSR-mediated
Dietary supplements in dermatology: a review of the evidence for zinc, biotin, vitamin D, nicotinamide, and polypodium.
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Dietary supplements are commonly recommended by dermatologists in the treatment of skin, hair, and nail disorders. This review of oral over the counter (OTC) supplement use in dermatology summarizes current evidence for the use of zinc, biotin, vitamin D, nicotinamide, and polypodium in the
Mechanistic insights in the use of a Polypodium leucotomos extract as an oral and topical photoprotective agent.
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Photoprotection is essential to prevent the deleterious effects of ultraviolet (UV) light, including skin cancer, photoaging and immunosuppression. Photoprotective agents can be classified according to their main mechanism of action. Some of them absorb or deflect UV photons (sunscreens), whereas
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