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SiaA: A Heme ProteinLibkind, Marianna 19 February 2007 (has links)
The protein SiaA (Streptococcal iron acquisition) is involved in heme uptake in the bacterium Streptococcus pyogenes. It is difficult to obtain this protein in its fully holo form (completely loaded with heme). To increase the concentration of heme in the growing cell, we added ä-aminolevulinic acid (ALA) and ferrous sulfate (FeSO4), precursors of heme, to the growth media. Neither increasing the concentration of heme in vivo, nor growth at lower temperature for longer times, increased the production of holoprotein. The classical method of measuring the concentration of heme in a newly discovered heme protein is cumbersome. We have developed an improved method, which gives a solution that is more stable and has a cleaner spectrum. With further development, this new technique may replace the classical assay. Background information on S. pyogenes, SiaA, ABC transporters, heme biosynthesis, and the pyridine hemochrome assay are described.
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X-ray crystallographic studies of 5-aminolaevulinic acid dehydrataseErskine, Peter Thomas January 1996 (has links)
No description available.
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Aminolevulinic acid based photodynamic therapy and diffuse optical reflectance spectroscopy /Engelking, Kirstin. January 2008 (has links)
Thesis (Ph.D.) OGI School of Science & Engineering at OHSU, March 2008. / Includes bibliographical references (leaves 163 - 169).
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Enzyme studies in variegate porphyriaMeissner, Peter Nicholas 14 July 2017 (has links)
No description available.
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Metronomic photodynamic therapy using an implantable LED device and orally administered 5-aminolevulinic acid / 留置型LEDデバイスと経口5-アミノレブリン酸を用いたメトロノミック光線力学療法Kirino, Izumi 24 July 2023 (has links)
京都大学 / 新制・論文博士 / 博士(医学) / 乙第13565号 / 論医博第2292号 / 新制||医||1068(附属図書館) / 京都大学大学院医学研究科医学専攻 / (主査)教授 小林, 恭, 教授 小濱, 和貴, 教授 上杉, 志成 / 学位規則第4条第2項該当 / Doctor of Medical Science / Kyoto University / DFAM
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SiaA: A Heme ProteinLibkind, Marianna 19 February 2007 (has links)
The protein SiaA (Streptococcal iron acquisition) is involved in heme uptake in the bacterium Streptococcus pyogenes. It is difficult to obtain this protein in its fully holo form (completely loaded with heme). To increase the concentration of heme in the growing cell, we added ä-aminolevulinic acid (ALA) and ferrous sulfate (FeSO4), precursors of heme, to the growth media. Neither increasing the concentration of heme in vivo, nor growth at lower temperature for longer times, increased the production of holoprotein. The classical method of measuring the concentration of heme in a newly discovered heme protein is cumbersome. We have developed an improved method, which gives a solution that is more stable and has a cleaner spectrum. With further development, this new technique may replace the classical assay. Background information on S. pyogenes, SiaA, ABC transporters, heme biosynthesis, and the pyridine hemochrome assay are described.
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New approaches for treatment of acute intermittent porphyria by enzyme substitution and gene therapy : evaluation in vitro and in vivo /Johansson, Annika, January 2004 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2004. / Härtill 5 uppsatser.
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The effect of exogenous DIM on Brassica napus and its role in response to heavy metal stressRoode, Enrico Carlo January 2017 (has links)
Magister Scientiae - MSc (Biotechnology) / Brassica napus is a plant that is used for human and animal consumption.
This plant is also used for phytoremediation due to its relatively higher level
of heavy metal tolerance. In South Africa, mining is one of the main drivers
of the economy. One of the major negative environmental impacts of mining
is heavy metal contamination. Soil metal content can rise to levels that are
quite high and can even have a negative impact on the yields of B. napus
crop. The glucosinolate-myrosinase system of B. napus is a system that is
used as defence against biotic stressors. Indole glucosinolate breakdown
products have been proven to enhance the antioxidant capacity of plants.
Some have also shown growth promoting properties in plants.
We studied the effect of exogenous DIM on B. napus and it role in Zr
induced heavy metal stress. Germination percentages revealed that DIM
increased germination, Zr application decreased germination and the DIMZr
treatment reversed the negative impact of Zr application on B. napus.
The effect of treatments on the biomass of B. napus was assessed by
determining the dry weights. Results show that exogenous DIM improves
biomass. Zr application decreased biomass and DIM-Zr treatment
ameliorated the effect of Zr application. / 2020-08-31
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Visualization of Brain Tumors with Intraoperative Confocal Laser EndomicroscopyJanuary 2020 (has links)
abstract: Intraoperative diagnosis in neurosurgery has traditionally relied on frozen and formalin-fixed, paraffin-embedded section analysis of biopsied tissue samples. Although this technique is considered to be the “gold standard” for establishing a histopathologic diagnosis, it entails a number of significant limitations such as invasiveness and the time required for processing and interpreting the tissue. Rapid intraoperative diagnosis has become possible with a handheld confocal laser endomicroscopy (CLE) system. Combined with appropriate fluorescent stains or labels, CLE provides an imaging technique for real-time intraoperative visualization of histopathologic features of the suspected tumor and healthy tissues.
This thesis scrutinizes CLE technology for its ability to provide real-time intraoperative in vivo and ex vivo visualization of histopathological features of the normal and tumor brain tissues. First, the optimal settings for CLE imaging are studied in an animal model along with a generational comparison of CLE performance. Second, the ability of CLE to discriminate uninjured normal brain, injured normal brain and tumor tissues is demonstrated. Third, CLE was used to investigate cerebral microvasculature and blood flow in normal and pathological conditions. Fourth, the feasibility of CLE for providing optical biopsies of brain tumors was established during the fluorescence-guided neurosurgical procedures. This study established the optimal workflow and confirmed the high specificity of the CLE optical biopsies. Fifth, the feasibility of CLE was established for endoscopic endonasal approaches and interrogation of pituitary tumor tissue. Finally, improved and prolonged near wide-field fluorescent visualization of brain tumor margins was demonstrated with a scanning fiber endoscopy and 5-aminolevulinic acid.
These studies suggested a novel paradigm for neurosurgery-pathology workflow when the noninvasive intraoperative optical biopsies are used to interrogate the tissue and augment intraoperative decision making. Such optical biopsies could shorten the time for obtaining preliminary information on the histological composition of the tissue of interest and may lead to improved diagnostics and tumor resection. This work establishes a basis for future in vivo optical biopsy use in neurosurgery and planning of patient-related outcome studies. Future studies would lead to refinement and development of new confocal scanning technologies making noninvasive optical biopsy faster, convenient and more accurate. / Dissertation/Thesis / Doctoral Dissertation Neuroscience 2020
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Regulation of hemT expression in Rhodobacter sphaeroides wild type strain 2.4.9.Coulianos, Natalie N. G. 18 April 2018 (has links)
No description available.
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