Difference between revisions of "Team:FJNU-China/InterLab"

 
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<li ><a href="https://2018.igem.org/Team:FJNU-China/Design">Design</a></li>
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<!-- Interlab -->
 
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             <h2 >Overview</h2>
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             <h2 style="color: white;text-shadow: 0 0 20px skyblue;">Overview</h2>
             <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam eu sem tempor, varius quam at, luctus dui. Mauris magna metus, dapibus nec turpis vel, semper malesuada ante. Vestibulum id metus ac nisl bibendum scelerisque non non purus. Suspendisse varius nibh non aliquet sagittis. In tincidunt orci sit amet elementum vestibulum. Vivamus fermentum in arcu in aliquam. Quisque aliquam porta odio in fringilla. Vivamus nisl leo, blandit at bibendum eu, tristique eget risus. Integer aliquet quam ut elit suscipit, id interdum neque porttitor. Integer faucibus ligula.</p>
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             <p>&nbsp;&nbsp;In our project, the InterLab goal is to explore whether we can use standardized absolute cell counts or colony forming units (CFU) instead of OD to reduce lab-to-lab variability in fluorescence measurements.</p>
            <p>Vestibulum quis quam ut magna consequat faucibus. Pellentesque eget nisi a mi suscipit tincidunt. Ut tempus dictum risus. Pellentesque viverra sagittis quam at mattis. Suspendisse potenti. Aliquam sit amet gravida nibh, facilisis gravida odio. Phasellus auctor velit at lacus blandit, commodo iaculis justo viverra. Etiam vitae est arcu. Mauris vel congue dolor. Aliquam eget mi mi. Fusce quam tortor, commodo ac dui quis, bibendum viverra erat. Maecenas mattis lectus enim, quis tincidunt dui molestie euismod. Curabitur et diam tristique, accumsan nunc eu, hendrerit tellus.</p>
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             <hr>
 
             <hr>
             <h2 >Protocol</h2>
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             <h2 style="color: white;text-shadow: 0 0 20px skyblue;" > Materials</h2>
             <p >Nullam hendrerit justo non leo aliquet imperdiet. Etiam in sagittis lectus. Suspendisse ultrices placerat accumsan. Mauris quis dapibus orci. In dapibus velit blandit pharetra tincidunt. Quisque non sapien nec lacus condimentum facilisis ut iaculis enim. Sed viverra interdum bibendum. Donec ac sollicitudin dolor. Sed fringilla vitae lacus at rutrum. Phasellus congue vestibulum ligula sed consequat.</p>
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             <p ><span style="font-size:20px;font-weight:bold;">Strain used</span></br><span style=" font-style:italic;">Escherichia coli</span>&nbsp;&nbsp;DH5α</p>
             <p>Vestibulum consectetur scelerisque lacus, ac fermentum lorem convallis sed. Nam odio tortor, dictum quis malesuada at, pellentesque vitae orci. Vivamus elementum, felis eu auctor lobortis, diam velit egestas lacus, quis fermentum metus ante quis urna. Sed at facilisis libero. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Vestibulum bibendum blandit dolor. Nunc orci dolor, molestie nec nibh in, hendrerit tincidunt ante. Vivamus sem augue, hendrerit non sapien in, mollis ornare augue.</p>
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             <p ><span style="font-size:20px;font-weight:bold;">Plasmid used</span></br>Negative control: BBa_R0040  Plate 7 Well 2D </br>
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Positive control: BBa_I20270  Plate 7 Well 2B  </br>
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Test Device 1: BBa_J364000  Plate 7 Well 2F  </br>
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Test Device 2: BBa_J364001  Plate 7 Well 2H  </br>
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Test Device 3: BBa_J364002  Plate 7 Well 2J  </br>
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Test Device 4: BBa_J364007  Plate 7 Well 2L  </br>
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Test Device 5: BBa_J364008  Plate 7 Well 2N  <br>
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Test Device 6: BBa_J364009  Plate 7 Well 2P
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</p>
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            <p ><span style="font-size:20px;font-weight:bold;">Machine</span></br>Molecular Devices SpectraMax i3x
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             <hr>
 
             <hr>
             <h2 >Result</h2>
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            <p style="margin-bottom: 5px;">Integer pulvinar leo id risus pellentesque vestibulum. Sed diam libero, sodales eget sapien vel, porttitor bibendum enim. Donec sed nibh vitae lorem porttitor blandit in nec ante. </p>
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             <h2 style="color: white;text-shadow: 0 0 20px skyblue;">Methods</h2>
             <div>
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             <p>&nbsp;&nbsp;We followed this <a href="https://static.igem.org/mediawiki/2018/3/3e/T--FJNU-China--Interlab-Protocol.pdf">protocol</a> to do the Interlab Study.</br>&nbsp;&nbsp;All of the calibration measurements have been performed at least three independent experiments. We transformed 8 plasmids into <span style="font-style:italic;">E.coli DH5α</span> competent cells, picked 2 colonies from each plate, and  cultured the colonies into 5 mL LB medium supplemented with chloramphenicol when necessary. After culturing the cells overnight at 37°C and 220 rpm, we used plate reader to measure the Abs600 and fluorescence of samples at 0 and 6 hours.</p>
            <img src="https://static.igem.org/mediawiki/2017/8/8b/ED_OG_Interlab_Fig1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
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            <p style="margin-bottom: 5px;">Integer pulvinar leo id risus pellentesque vestibulum. Sed diam libero, sodales eget sapien vel, porttitor bibendum enim. Donec sed nibh vitae lorem porttitor blandit in nec ante. </p>
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            <img src="https://static.igem.org/mediawiki/2017/8/8b/ED_OG_Interlab_Fig1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
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            <p style="margin-bottom: 5px;">Integer pulvinar leo id risus pellentesque vestibulum. Sed diam libero, sodales eget sapien vel, porttitor bibendum enim. Donec sed nibh vitae lorem porttitor blandit in nec ante. </p>
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            <img src="https://static.igem.org/mediawiki/2017/8/8b/ED_OG_Interlab_Fig1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
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            <p style="margin-bottom: 5px;">Integer pulvinar leo id risus pellentesque vestibulum. Sed diam libero, sodales eget sapien vel, porttitor bibendum enim. Donec sed nibh vitae lorem porttitor blandit in nec ante. </p>
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            <img src="https://static.igem.org/mediawiki/2017/8/8b/ED_OG_Interlab_Fig1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
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             <hr>
 
             <hr>
             <h2 >Analyse</h2>
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            <p style="margin-bottom: 5px;">Suspendisse a orci facilisis, dignissim tortor vitae, ultrices mi. Vestibulum a iaculis lacus. Phasellus vitae convallis ligula, nec volutpat tellus. Vivamus scelerisque mollis nisl, nec vehicula elit egestas a. Sed luctus metus id mi gravida, faucibus convallis neque pretium. Maecenas quis sapien ut leo fringilla tempor vitae sit amet leo. Donec imperdiet tempus placerat. Pellentesque pulvinar ultrices nunc sed ultrices. Morbi vel mi pretium, fermentum lacus et, viverra tellus. Phasellus sodales libero nec dui convallis, sit amet fermentum sapien auctor. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Sed eu elementum nibh, quis varius libero.</p>
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             <h2 style="color: white;text-shadow: 0 0 20px blue;">Result</h2>
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          <p ><span style="font-size:20px;font-weight:bold;">Calibration</span></br>Calibration 1: OD600 reference point</p>
             <img src="https://static.igem.org/mediawiki/2017/8/8b/ED_OG_Interlab_Fig1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
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             <img src="https://static.igem.org/mediawiki/2018/3/3a/T--FJNU-China--Interlab-table1.png"  style="display:block; margin:0 auto;padding-bottom: 2em;">
 
              
 
              
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          </br><p >Calibration 2: Particle Standard Curve</p>
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          <p ><span style="font-size:20px;font-weight:bold;">Cell measurement</span></p>
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            <h2 style="color: white;text-shadow: 0 0 20px skyblue;">Analysis</h2>
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            <p style="margin-bottom: 5px;">&nbsp;&nbsp;A standard curve in a linear relationship can be obtained by calibration experiments. </br>
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By comparing and analyzing the fluorescence values and absorbance values at 0 and 6 hours, we can draw the following conclusions: the negative control and the positive control showed significant differences of fluorescence values at 6 h. Among the six different test equipment, the device 4 has the strongest fluorescence, while device 3 has the lowest fluorescence.
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</p>
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            <h2 >Discussion</h2>
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            <p style="margin-bottom: 5px;">&nbsp;&nbsp;&nbsp;&nbsp;During the experiment, we encountered two problems.</br>
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&nbsp;&nbsp;1. In the cell measurement experiment, we need to dilute the cultures further to a target Abs600 of OD 0.02, but there are always errors in the actual operation. We cannot accurately dilute the solution to OD 0.02.  So we hope that the protocol can provide acceptable error range.</br>
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&nbsp;&nbsp;2. In the second calibration experiment, the particle standard curve log graph is not a straight line. We guess that it is due to pipetting error or the time to add the sample is too long.
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</p>
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          <hr>
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            <h3>Reference</h3>
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            <p style="margin-bottom: 5px;font-size:15px;">1.Beal J, Haddock-Angelli T, Gershater M, de Mora K, Lizarazo M, Hollenhorst J, et al. (2016) Reproducibility of Fluorescent Expression from Engineered Biological Constructs in E. coli. PLoS ONE 11(3): e0150182. </br>
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2.https://2018.igem.org/Measurement/InterLab</br>
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3.http://parts.igem.org/Part:BBa_J61002
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Latest revision as of 03:58, 18 October 2018

Interlab

Overview

  In our project, the InterLab goal is to explore whether we can use standardized absolute cell counts or colony forming units (CFU) instead of OD to reduce lab-to-lab variability in fluorescence measurements.


Materials

Strain used
Escherichia coli  DH5α

Plasmid used
Negative control: BBa_R0040 Plate 7 Well 2D
Positive control: BBa_I20270 Plate 7 Well 2B
Test Device 1: BBa_J364000 Plate 7 Well 2F
Test Device 2: BBa_J364001 Plate 7 Well 2H
Test Device 3: BBa_J364002 Plate 7 Well 2J
Test Device 4: BBa_J364007 Plate 7 Well 2L
Test Device 5: BBa_J364008 Plate 7 Well 2N
Test Device 6: BBa_J364009 Plate 7 Well 2P

Machine
Molecular Devices SpectraMax i3x


Methods

  We followed this protocol to do the Interlab Study.
  All of the calibration measurements have been performed at least three independent experiments. We transformed 8 plasmids into E.coli DH5α competent cells, picked 2 colonies from each plate, and cultured the colonies into 5 mL LB medium supplemented with chloramphenicol when necessary. After culturing the cells overnight at 37°C and 220 rpm, we used plate reader to measure the Abs600 and fluorescence of samples at 0 and 6 hours.


Result

Calibration
Calibration 1: OD600 reference point


Calibration 2: Particle Standard Curve

Cell measurement


Analysis

  A standard curve in a linear relationship can be obtained by calibration experiments.
By comparing and analyzing the fluorescence values and absorbance values at 0 and 6 hours, we can draw the following conclusions: the negative control and the positive control showed significant differences of fluorescence values at 6 h. Among the six different test equipment, the device 4 has the strongest fluorescence, while device 3 has the lowest fluorescence.

Discussion

    During the experiment, we encountered two problems.
  1. In the cell measurement experiment, we need to dilute the cultures further to a target Abs600 of OD 0.02, but there are always errors in the actual operation. We cannot accurately dilute the solution to OD 0.02. So we hope that the protocol can provide acceptable error range.
  2. In the second calibration experiment, the particle standard curve log graph is not a straight line. We guess that it is due to pipetting error or the time to add the sample is too long.


Reference

1.Beal J, Haddock-Angelli T, Gershater M, de Mora K, Lizarazo M, Hollenhorst J, et al. (2016) Reproducibility of Fluorescent Expression from Engineered Biological Constructs in E. coli. PLoS ONE 11(3): e0150182.
2.https://2018.igem.org/Measurement/InterLab
3.http://parts.igem.org/Part:BBa_J61002