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protoporphyrin/karies
Linkki tallennetaan leikepöydälle
Sivu 1 alkaen 83 tuloksia
Photodetection with 5-Aminolevulinic acid-induced protoporphyrin IX in the rat abdominal cavity: drug-dose-dependent fluorescence kinetics.
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In 75% of cases, ovarian carcinoma has already metastasized in the abdominal cavity at the time of diagnosis. For determination of the necessity for a supplementary therapy, in addition to surgical resection, it is important to localize and stage microscopical intraperitoneal metastases of the
Fluorescence imaging and spectroscopy of 5-aminolevulinic acid induced protoporphyrin IX for the detection of neoplastic lesions in the oral cavity.
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BACKGROUND
Semiquantitative fluorescence measurements following topical application of 5-aminolevulinic acid (5-ALA) in 16 patients with neoplastic lesions of the oral cavity were performed.
METHODS
Time course and type of porphyrin accumulation were analyzed in neoplastic and surrounding healthy
Detection of squamous cell carcinoma of the oral cavity by imaging 5-aminolevulinic acid-induced protoporphyrin IX fluorescence.
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OBJECTIVE
Early cancer detection is the best way to improve the prognosis of patients with oral cancer. Therefore this study presents quantitative fluorescence measurements and results in the visualization of cancerous oral mucosa with 5-aminolevulinic acid (5-ALA)-induced protoporphyrin IX
Detection of neoplasms in the oral cavity by digitized endoscopic imaging of 5-aminolevulinic acid-induced protoporphyrin IX fluorescence.
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Studies of 5-aminolevulinic acid (5-ALA) induced protoporphyrin IX (PPIX) fluorescence have shown a sensitivity of 95-100% for oral cancer diagnosis, but the specificity is only about 50-60%. To improve the diagnostic specificity, a 5-ALA mediated digitized fluorescence endoscopic imaging system was
[Visualizing carcinomas of the mouth cavity by stimulating synthesis of fluorescent protoporphyrin IX].
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The fluorescence diagnosis based on the aminolavulinic acid-stimulated porphyrin synthesis allows the detection of superficial tumors in a very early stage even when they are very small tumors. A fluorescence diagnosis of tumors in the oral cavity can be simply performed by rinsing with a 0.4% ALA
A study of aminolevulinic acid-induced protoporphyrin IX fluorescence kinetics in the canine oral cavity.
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OBJECTIVE
5-Aminolevulinic acid-induced protoporphyrin IX is a promising photosensitizer that could enhance the spectroscopic contrast between normal and diseased oral tissues. Knowledge of the pharmacokinetics and effects on tissue type are important for diagnostic and therapeutic
Comparison of aminolevulinic acid- and hexylester aminolevulinate-induced protoporphyrin IX fluorescence for the detection of ovarian cancer in a rat model.
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OBJECTIVE
This study set out to compare the photodetection of peritoneal micrometastases in an ovarian cancer model following administration of two precursors of protoporphyrin IX (PpIX): 5-aminolevulinic acid (ALA) and hexylester aminolevulinate (He-ALA).
METHODS
ALA or He-ALA (100 mg/kg) was
[Photodynamic diagnosis of neoplasms of the mouth cavity after local administration of 5-aminolevulinic acid].
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BACKGROUND
The aim of photodynamic diagnosis (PDD) is the complete visualization of all neoplastic lesions in a tumorous organ after topical or systemic application of a tumor selective photosensitizer. In this investigation we performed semiquantitative fluorescence measurements following topical
Ability of laser fluorescence device associated with fluorescent dyes in detecting and quantifying early smooth surface caries lesions.
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A laser fluorescence (LF) device is a portable tool, but it does not measure minor mineral changes. Our in vitro study aim is to propose the association of an LF with two fluorescent dyes and to evaluate the performance in detecting and quantifying early demineralization. Artificial caries lesions
Assignment of the heme axial ligand(s) for the ferric myoglobin (H93G) and heme oxygenase (H25A) cavity mutants as oxygen donors using magnetic circular dichroism.
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UV-visible absorption and magnetic circular dichroism (MCD) data are reported for the cavity mutants of sperm whale H93G myoglobin and human H25A heme oxygenase in their ferric states at 4 degreesC. Detailed spectral analyses of H93G myoglobin reveal that its heme coordination structure has a single
Laser confocal endomicroscopy as a novel technique for fluorescence diagnostic imaging of the oral cavity.
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Malignancies of the oral cavity are conventionally diagnosed by white light endoscopy, biopsy, and histopathology. However, it is often difficult to distinguish between benign and premalignant or early lesions. A laser confocal endomicroscope (LCE) offers noninvasive, in vivo surface and subsurface
Via zinc(II) protoporphyrin to the synthesis of poly(ZnPP-MAA-EGDMA) for the imprinting and selective binding of bilirubin.
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Poly(zinc protoporphyrin-methacrylic acid-ethyl glycol dimethylacrylate) (poly(ZnPP-MAA-EGDMA)) imprinted with alpha-bilirubin can cause spectroscopic change in wavelength and absorption intensity due to the metal-ion coordination between ZnPP and bilirubin. The fluorescent imprinted polymer was
Fluorescence spectroscopy combined with 5-aminolevulinic acid-induced protoporphyrin IX fluorescence in detecting oral premalignancy.
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BACKGROUND
Early detection of premalignant/malignant lesions in the oral cavity can certainly improve the patient's prognosis. This study presents fluorescence imaging with the topical application of 5-aminolevulinic as a way to improve detection of various oral tissue pathologies. This procedure
Human serum albumin-based peroxidase having an iron protoporphyrin IX in artificial heme pocket.
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Cooking up enzymes: Iron protoporphyrin IX (heme) is bound within a hydrophobic cavity in subdomain IB of human serum albumin (HSA). Site-specific mutations to introduce proximal and distal histidines into the heme pocket of HSA conferred a peroxidase activity to the prosthetic heme group. The
Multi-frequency and high-field EPR study of manganese(III) protoporphyrin IX reconstituted myoglobin with an S=2 integer electron spin.
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We investigate the electronic state of Mn(III) center with an integer electron spin S=2 in the manganese(III) protoporphyrin IX reconstituted myoglobin, Mn(III)Mb, by means of multi-frequency electron paramagnetic resonance (MFEPR) spectroscopy. Using a bimodal cavity resonator, X-band EPR signal
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