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The thermographic imaging (FLIR systems ThermoCAM? S60, Frankfurt, Germany) was carried out in a room with only cold light sources. The tuclazepam camera was set at a distance of 30?cm from the target lesion and focused automatically. The pictures were taken before, during and after the treatment. The maximum temperature (Tmax) of the target lesion was analysed. The transepidermal water loss (TEWL) was measured after 15?min rest with Tewameter? TM 300 (Courage-Khazaka, Cologne, Germany) before, during and after the treatment under standardized conditions regarding temperature and relative humidity. Pre- and post-treatment 4 mm skin punch biopsies from both treatment areas were embedded and stored at ?80��C. Skin sections of 4?��m were stained for CD4+ T cells by the streptavidin/biotin complex method using a monoclonal antibody Daprodustat molecular weight to CD4 (clone MT310, Dako, Hamburg, Germany) and the alkaline phosphatase/red detection kit (Dako). The cells were counted in three consecutive 200?��?300-��m-fields at 100�� magnification, and the averages were calculated. For measurements of the epidermal thickness, the 4 ��m skin sections were stained with hematoxylin (Papanicolaou��s solution, Merck, Darmstadt, Germany) and eosin (Eosin-Phloxin-solution, Dr. K. Hollborn&S?hne, Leipzig, Germany). Measurements were taken using the Axiovision measuring-tools (Zeiss, Berlin, Germany) at 100�� magnification. For immunostaining of FoxP3 expressing cells (FoxP3+ cells) and the proliferation marker Ki-67, the 4 ��m frozen sections were fixed in buffered formalin and subjected to a heat-induced Chaetocin epitope retrieval step before incubation with antibodies. Sections were immersed in sodium citrate buffer solutions at pH 6.0 and heated in a high-pressure cooker. The slides were rinsed in cool running water, washed in Tris-buffered saline (pH 7.4) and incubated with the respective primary antibody. The primary antibodies included monoclonal mouse anti-Ki-67 (MIB-1, Dako) or rat anti-FoxP3 (PCH101, eBioscience, San Diego, USA). For detection, the streptavidin-AP kit (K5005, Dako) was used either alone or following biotinylated rabbit anti-rat (Dako) secondary antibody. Negative controls were performed by omitting the primary antibody. The cells were counted in three consecutive slides at 100�� (FoxP3) and 200�� magnification (Ki-67). spss statistics 17.0 (SPSS, Inc., Chicago, IL, USA) was used for all statistical analysis. All data are expressed as median [minimum�Cmaximum]. Statistical analyses were performed with non-parametrical tests, either by the Mann�CWhitney test (unpaired data) or by the Wilcoxon test (paired data). A P-value