Team:Heidelberg/Notebook/miMeasure

From 2010.igem.org

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Revision as of 01:03, 27 October 2010

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Example.jpg
 

miMeasure

Analysis of binding sites against synthetic miRNA miRsAg

5000 Hela cells were seeded on day one in each well of the 96 well plate. Transfection of the constructs (M12-M22) with four different conditions were carried out on day two. The ratio of transfection is 1 (M construct) : 5 (stuffer/ miRsAg/ pcDNA5/ shRNA3) with a total amount of 50ng DNA.

Condition a: cotransfection with stuffer (salmon sperm DNA)

Condition b: cotransfection with synthetic RNA miRsAg

Condition c: cotransfection with empty pcDNA5

Condition d: cotransfection with synthetic shRNA3

A control consisting of the empty miMeasure plasmid (without binding site) was also cotransfected with the same conditions a, b, c and d.

The cells were used for measurements on day three.


GFP/BFP ratio normalized by the negative control The data are generated by confocal microscopy of Hela cells, which were transfected with different miMeasure constructs (M12-22) including the negative control (miMeasure construct without binding site). The negative control equals to 1.

Table1

table 1: used binding sites and their features
sequencebinding site featureName/number
ctcagtttactagtgccatttgttcperfect binding site against miRsAgM12
ctcagtttactagacgcatttgttcmiMeasure with randomised nucleotides 10-12M13
ctcagtttactagtaacatttgttcmiMeasure with randomised nucleotides 10-12M14
ctcagtttactagacggatttgttcmiMeasure with randomised nucleotides 9-12M15
ctcagtttactagatgtatttgttcmiMeasure with randomised nucleotides 9-12M16
ctcagtttactagtggcatttgttcmiMeasure with mutated nucleotide 10M17
ctcagtttactagtgacatttgttcmiMeasure with mutated nucleotide 10M18
ctcagtttactagtaccatttgttcmiMeasure with mutated nucleotide 9M20
ctcagttatgtagtgccatttgttcmiMeasure with mutated nucleotide 9M22


miraPCR: analysis of endogenous miRNA

Hela and Huh7 cells were transfected with the constructs miM-r12, miM-r22, miM-1.3-7 and miM-3.1-8 (see table2). These constructs contain binding sites against miR-122. Since Huh7 cells express miR-122, the constructs will be affected in the Huh7 cells without cotransfecting any miRNAs, whereas miR-122 were cotransfected for the Hela cells. The transfection is done with lipofectamin. 70ng of total DNA is used and for Hela cells the miRNA to miMeasure construct ratio was 2:1. The cells were imaged one day after trasnfection with the Leica confocal microspe. The result shows the ratio between GFP and BFP normalized to the negative control, where miMeasure constructs without binding sites are transfected. The miMeasure construct with one perfect binding site is also transfected.



Table2

table 2: raPCR designed binding sites and their features
binding site featureName/number
miMeasure with 3 aligned perfect binding sitesmiM-1.3-7
miMeasure with two imperfect binding sitesmiM-3.1-8
miMeasure with randomised nucleotides 9-12miM-r12
miMeasure with randomised nucleotides 9-22miM-r22

Retrieved from "http://2010.igem.org/Team:Heidelberg/Notebook/miMeasure"