The use of resected lung

The use of resected lung phase 3 tissues for research pur poses was approved by the local institutional review board. Reverse transcriptase quantitative polymerase Chain reaction analysis RT qPCR experiments were performed as previously de scribed with some modifications. Bronchial segments were crushed and homogenized in TRIzol reagent imme diately after dissection, using a ball mill TissueLyser LT. Total Inhibitors,Modulators,Libraries RNA was extracted from bronchus homogenates using TRIzol. The amount of RNA extracted was estimated by spectrophotometry at 260 nm and its quality was assessed in a microfluidic electrophor esis system. After treatment with DNase I, 1 ug of total RNA was subjected to reverse transcrip tion. The resulting cDNA was then used for quantitative real time PCR experiments with TaqMan chemistry.

The amplification was car ried out using 20 ng cDNA in a StepOnePlus thermocycler. The Inhibitors,Modulators,Libraries conditions were as follows initial denaturation at 95 C for 10 min followed by 40 cycles of annealing/extension. Fluorescence was measured at each cycle and the threshold cycle of the real time PCR was defined as the point Inhibitors,Modulators,Libraries at which a fluorescence signal corresponding to the amplification of a PCR product was detectable. The re action volume was set at 10 uL. and TAS2R46 has been analysed in the bronchi using a specific TaqMan array based on prede signed reagents. In order to validate the extraction of intact cellular mRNA and standardize the quantitative data, three reference genes, glyceraldehyde 3 phosphate dehydrogenase and B glucuronidase were amplified as the same time.

Preparation of tissues for organ bath studies The bronchi were dissected, cleaned and cut into seg ments of identical length and diameter, as previously described, with a technique which was previously Inhibitors,Modulators,Libraries shown to preserve a functional epithelium. Inhibitors,Modulators,Libraries Only bronchial segments far from the tumour area and with an inner diameter of between 1 mm and 3 mm were se lected. Before use, the segments were stored at 4 C in a Krebs Henseleit solution. On the follow ing day, human bronchial segments were placed in iso lated organ bath filled with 5 mL of Krebs Henseleit solution, oxygenated with 95%/5% O2/CO2 and thermos tated at 37 C. Tension was measured isometrically with a strain gauge connected to an amplifier. Data were acquired, processed and analysed with a computerized system running IOX v1. 56. 8 and Datana lyst v1. 58 software. An initial load of about 3 g was applied to each segment, which rapidly fell down to a basal tone comprised be tween 1. 5 and 2. 5 g during the stabilisation period, when the preparations were allowed to stand for thirty mi nutes with renewal of the Krebs Henseleit solution every ten minutes. In a first set of experiments, the bronchi were pre contracted with 10 uM histamine.

Leave a Reply

Your email address will not be published. Required fields are marked *


You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>