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Bladzijde 1 van 582 resultaten
Ovarian Sex Cord-stromal Tumors With Melanin Pigment: Report of a Previously Undescribed Phenomenon.
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We report 2 ovarian sex cord-stromal tumors, a luteinized adult granulosa cell tumor and a cellular fibroma, with melanin pigment. These occurred in 44 and 61-yr-old patients, respectively. As far as we are aware, melanin pigment has not been described previously in an ovarian sex cord-stromal
Thermohydrogel Containing Melanin for Photothermal Cancer Therapy.
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Melanin is an effective absorber of light and can extend to near infrared (NIR) regions. In this study, a natural melanin is presented as a photothermal therapeutic agent (PTA) because it provides a good photothermal conversion efficiency, shows biodegradability, and does not induce long-term
Natural melanin-loaded nanovesicles for near-infrared mediated tumor ablation by photothermal conversion.
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Photothermal therapy requires a biocompatible material to absorb near-infrared (NIR) light and generate sufficient heat. Herein, we suggest natural melanin-loaded nanovesicles (melasicles) as photothermal therapeutic agents (PTA) for NIR mediated cancer therapy in vivo. The mean size of these
Matrix metalloproteinase-initiated aggregation of melanin nanoparticles as highly efficient contrast agent for enhanced tumor accumulation and dual-modal imaging
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Ultrasmall melanin nanoparticles (MNPs) have great application potential in medical imaging, owing to its satisfactory biodegradation, intrinsic photoacoustic (PA) property and natural chelating ability with metal ions for magnetic resonance imaging (MRI). Because of its ultrasmall particle size, it
Opto-acoustic synergistic irradiation for vaporization of natural melanin-cored nanodroplets at safe energy levels and efficient sono-chemo-photothermal cancer therapy
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Rationale: Insufficient penetration and accumulation of theranostic payloads in solid tumors greatly challenge the clinical translation of cancer nanomedicines. To address this challenge, we synthesized natural melanin-cored and doxorubicin-loaded perfluoropentane nanodroplets with good
A melanin-mediated cancer immunotherapy patch.
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Melanin is capable of transforming 99.9% of the absorbed sunlight energy into heat, reducing the risk of skin cancer. We here develop a melanin-mediated cancer immunotherapy strategy through a transdermal microneedle patch. B16F10 whole tumor lysate containing melanin is loaded into polymeric
Association of Conjunctival Dysplasia (Squamous Intraepithelial Neoplasia) with Melanosis (Microscopic Non- Proliferative Melanin Pigmentation)
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Purpose: To determine the association between conjunctival epithelial dysplasia (squamous intraepithelial neoplasia) and its melanosis (microscopic non-proliferative melanin pigmentation) in conjunctival biopsies.
Pharmacokinetics of Ro 03-8799 in mice bearing melanosarcoma: comparison with tumors without melanin.
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The pharmacokinetics of Ro 03-8799 has been studied in melanic and non-melanic tumor bearing mice after iv administration of 150 mg/kg. The peak concentration in B16 melanosarcoma tumor reached 152 micrograms/g, that is 7.6-fold higher than the plasma concentration at the same time. This
Melanin-based Nanomaterials: The promising Nanoplatforms for Cancer diagnosis and therapy.
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Melanin-based nanoplatforms are biocompatible nanomaterials with a variety of unique physicochemical properties such as strong photothermal conversion ability, excellent drug binding capacity, strong metal chelation capacity, high chemical reactivity and versatile adhesion ability. These innate
Antitumor effects of melanin from Lachnum YM226 and its derivative in H22 tumor-bearing mice.
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In the present study, we investigated the anti-tumor activities of the intracellular homogeneous melanin (LM) of Lachnum YM226 and its derivative (ALM) on liver cancer using murine H22 hepatocarcinoma model. The results showed that LM and ALM (50 and 200 mg kg-1) could effectively inhibit tumor
Melanin nanoparticles derived from a homology of medicine and food for sentinel lymph node mapping and photothermal in vivo cancer therapy.
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The use of non-toxic or low toxicity materials exhibiting dual functionality for use in sentinel lymph node (SLN) mapping and cancer therapy has attracted considerable attention during the past two decades. Herein, we report that the natural black sesame melanin (BSM) extracted from black sesame
Water Soluble Melanin Derivatives for Dynamic Contrast Enhanced Photoacoustic Imaging of Tumor Vasculature and Response to Antiangiogenic Therapy.
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A dynamic contrast enhanced (DCE) approach for tumor photoacoustic (PA) imaging is described. Novel water soluble melanin-based derivatives are synthesized that exhibit good PA properties, stability, safety and accumulation in tumor bearing mice. This melanin derivative is capable to characterize
Herbal melanin modulates tumor necrosis factor alpha (TNF-alpha), interleukin 6 (IL-6) and vascular endothelial growth factor (VEGF) production.
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Recent studies have indicated that cytokines can enhance immunogenicity and promote tumor regression. However, the means for modulating cytokine production are not yet fully investigated. In this study we report the effects of a herbal melanin, extracted from Nigella sativa L., on the production of
Selective delivery of boron by the melanin precursor analogue p-boronophenylalanine to tumors other than melanoma.
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The melanin precursor analogue p-boronophenylalanine (BPA) has been used to deliver 10B to melanoma tissue for boron neuron capture therapy. Uptake studies in tumor models other than melanoma now indicate that BPA is capable of delivering therapeutic amounts of boron to tumors other than melanoma.
Phytochemical Curcumin-Coformulated, Silver-Decorated Melanin-like Polydopamine/Mesoporous Silica Composites with Improved Antibacterial and Chemotherapeutic Effects against Drug-Resistant Cancer Cells
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The devastating occurrence of drug resistance such as antimicrobial resistance has aroused global concerns for public health, which has propelled a continuous pursuit of safe and effective therapeutic agents. In this study, silver nanoparticles were decorated in mesoporous silica of SBA-15 coated
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