1,759 research outputs found

    REFRACTORY OF WELL-DIFFERENTIATED THYROID CANCER TO THE TREATMENT WITH RADIOACTIVE IODINE

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    Resistance of well-differentiated distant metastases to radioactive iodine treatment severely deteriorate survival prognosis of patients. Chemotherapy (doxorubicin and combinations) and retinoid acid analoques (isotretinоin, roaccutan) implimentation did not allow to recommend them as a therapy of choice. Effectiveness of several multikinase inhibitors (vandetanib, sorafenib, sunitinib) was confirmed in phase II clinical trials. In result of phase III clinical trial of sorafenib (reported on ASCO’2013, Chicago, USA) its therapeutic efficacy in patient with iodine-refractory well-differentiated thyroid cancer was affirmed

    New Limit for the Half-Life of 2K(2neutrino)-Capture Decay Mode of 78Kr

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    Features of data accumulated at 1817 hours in the experimental search for 2K(2 \nu)-capture decay mode of Kr-78 are discussed. The new limit for this decay half-life is found to be T_{1/2} > 2.3 *10^{20} yr. (90% C.L.).Comment: 7 pages, 4 figures, submitted to Phys. of Atom. Nuc

    Interdisciplinary databank in oncoendocrinology: radioiodine refractory differentiated thyroid cancer

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    High achievements in personalized evidence-based medicine and oncology, particularly in developed countries, are associated with the successful development of clinical carceral registries of patients (SEER, NCDB, etc.), which are multimodal data banks. They are a data matrix for the development of analytical and prognostic tools in the study of diagnostic features, clinical disease course, therapy response, assessment of prognostic factors, etc. From the point of view of medical digital data banks, data redundancy and duplication are not as critical as information incompleteness or inconsistency when making medical decisions. This study aimed to present a multimodal database of patients with radioiodine refractory differentiated thyroid cancer, which is essentially a modern interdisciplinary digital medical registry. Along with demographic and nosological data that is typical for epidemiological registers, the multimodal data banks consider key clinical and paraclinical data, such as the results of laboratory, morphological, and instrumental research methods, and various imaging methods, such as ultrasound, computed tomography (CT), magnetic resonance imaging, single-photon emission computed tomography/CT, and positron emission tomography/CT. The multimodal data banks present the molecular genetic profile results of the tumor, of which the clinical usefulness in the choice of treatment tactics is undoubted today. All these data are accumulated in the multimodal data banks, noting the execution time and the revision results (second opinion), considering standardized qualitative and quantitative parameters (factors) that potentially affect the clinical course, treatment response, complication development, and outcomes

    Near-Infrared Fluorescent Proteins and Their Applications

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    High transparency, low light-scattering, and low autofluorescence of mammalian tissues in the near-infrared (NIR) spectral range (650-900 nm) open a possibility for in vivo imaging of biological processes at the micro-and macroscales to address basic and applied problems in biology and biomedicine. Recently, probes that absorb and fluoresce in the NIR optical range have been engineered using bacterial phytochromes-natural NIR light-absorbing photoreceptors that regulate metabolism in bacteria. Since the chromophore in all these proteins is biliverdin, a natural product of heme catabolism in mammalian cells, they can be used as genetically encoded fluorescent probes, similarly to GFP-like fluorescent proteins. In this review, we discuss photophysical and biochemical properties of NIR fluorescent proteins, reporters, and biosensors and analyze their characteristics required for expression of these molecules in mammalian cells. Structural features and molecular engineering of NIR fluorescent probes are discussed. Applications of NIR fluorescent proteins and biosensors for studies of molecular processes in cells, as well as for tissue and organ visualization in whole-body imaging in vivo, are described. We specifically focus on the use of NIR fluorescent probes in advanced imaging technologies that combine fluorescence and bioluminescence methods with photoacoustic tomography.Peer reviewe

    Results of a search for 2β\beta-decay of 136^{136}Xe with high-pressure copper proportional counters in Baksan Neutrino Observatory

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    The experiment for the 2β\beta-decay of 136^{136}Xe search with two high-pressure copper proportional counters has been held in Baksan neutrino observatory. The search for the process is based on comparison of spectra measured with natural and enriched xenon. No evidence has been found for 2β\beta(2ν\nu)- and 2β\beta(0ν\nu)-decay. The decay half lifetime limit based on data measured during 8000 h is T1/2_{1/2}8.51021\geq8.5\cdot10^{21}yr for 2ν\nu-mode and T1/2_{1/2}3.11023\geq3.1\cdot10^{23}yr for 0ν\nu-mode (90%C.L.).Comment: 9 pages, 8 figures; talk at the NANP'05 Conference; submitted to Phys. At. Nuc

    The current state of the problem of soft tissue defects replacement in the lower extremities in conditions of chronic osteomyelitis

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    Based on the data of scientific literature, the current state of the problem of soft tissue defects replacement in the lower extremities in conditions of chronic osteomyelitis has been analyzed. Taking into account certain requirements for the replacement of defects of this nature, the following reconstructive tasks have been indicated. First of all, for adequate restoration of the skin with simultaneous relief of the purulent-necrotic process, it is necessary to use blood-supplied tissue complexes, which, if possible, should be formed from tissues similar to those surrounding the defect. The predominant use of technically and economically beneficial interventions is of great importance. The most suitable are loco-regional flaps with axial blood supply, among which the most promising are perforant flaps. It is necessary to develop an algorithm for defects reconstruction using loco-regional perforant flaps, depending on the defect area. It is also necessary to conduct a comparative analysis of the anatomical advantages and effectiveness of using various perforant and insular flaps on the vascular pedicle. A one-stage orthoplastic approach will allow the most effective use of the achievements of reconstructive plastic surgery in orthopedics to restore limb function, which will improve the results of treatment of patients

    THYROID HORMONE THERAPY PRINCIPLES AFTER SURGERY OF THYROID TUMORS

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    Thyroid hormone administration after thyroid tumors surgery is a part of complex treatment strategy. In case of papillary, follicular and poor-differentiated carcinomas suppressive treatment regime is indicated with target TSH level ≤ 0.1 IU/l. Intensity and duration of TSH suppressive treatment regime depends on tumor recurrence risk group and presence of severe cardio-vascular disease. In case of medullary and anaplastic thyroid cancer require substitutive treatment regime as well as after benign tumor surgery. If patient has been undergone partial thyroid resection by reason of benign tumor the suppressive treatment necessity would be settled in terms of postsurgical TSH level. Thereafter on substitutive or suppressive L-thyroxine treatment patient has achieved target TSH level the further control of it is conducting half in year and annually later
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