Difference between revisions of "Part:BBa K817021"
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<partinfo>BBa_K817021 SequenceAndFeatures</partinfo>
 
<partinfo>BBa_K817021 SequenceAndFeatures</partinfo>
  
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===Functional Assay===
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===Design Notes===
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We add constitutive promoter part J23119 and RBS part B0030 in the front of K817027 and double terminator part B0015 for backward insertion.
  
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===Method===
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Previous studies have shown that Penetratin can help GLP-1 to increase its penetration rate to 5% ''in vivo''.[[#Ref1|[1]]] We used similar transwell penetration assay method done by others before.[[#Ref2|[2]]] We seeded the intestinal cells in transwells and incubated for two weeks to let them grow to form tight junctions. The transwells were put on 24 well plates and were soaked in media (DMEM). We made 10 nm GLP-1 solution mixed with different concentration of Penetratin (10 nm, 50 nm, 100 nm, 500 nm) and added it to the upper portion of transwells. After different time (1 hr, 3 hr, 5 hr, 7 hr, 9 hr) we collected small amount of media in 6 wells (the lower portion of transwells) and measured the GLP-1 concentration by ELISA. We expected to see both time course and Penetratin dose-dependent manner of GLP-1 penetration.
  
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<!-- Uncomment this to enable Functional Parameter display
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===Protocol===
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====A. Transwell Penetration Assay====
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#Seed Caco-2 intestinal epithelial cells on transwells, and incubate them until the resistance is greater than 1000 Ohm/cm<sup>2</sup> (Suggesting the cells are polarized and the tight junctions are well-formed[[#Ref3|[3]]]).
 +
#Wash the transwells with PBS for 3 times, transfer the transwells to a new 6 well plate. There are 2 mL media (DMEM) in each well of the new plate.
 +
#Add 500 μL 20 nM GLP-1 (in DMEM) to each transwell, and add 500 μL Penetratin (in DMEM) in ascending orders of concentration (20nm, 100 nm, 200 nm, 1000 nm). Start to keep time.
 +
#Collect 100 μL media in the lower wells at 1 hr, 3 hr, 5 hr, 7 hr, 9 hr, and keep the sample in -20℃ before ELISA.
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====B. ELISA====
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#Wash the wells with 250 μL Wash Buffer.
 +
#Add 100 μL Assay Buffer to each well, and add 100 μL standards in ascending orders to wells, and add samples in the remaining wells.
 +
#Incubate at 4℃ overnight.
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#Decant liquid from plate.
 +
#Wash 5 times with 250 μL Wash Buffer.
 +
#Add 200 μL Detection Conjugate in each well. Incubate 2 hr at room temperature.
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#Wash 3 times with 250 μL Wash Buffer.
 +
#Add 200 μL diluted substrate and incubate for 20 min.
 +
#Read plate on fluorescence plate reader with excitation/emission wavelength of 355 nm/460 nm.
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 +
<!-- Uncomment this to enable Functional Parameter display  
 
===Functional Parameters===
 
===Functional Parameters===
 
<partinfo>BBa_K817021 parameters</partinfo>
 
<partinfo>BBa_K817021 parameters</partinfo>
 
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Revision as of 10:47, 5 October 2012

RBS-SP1-Penetratin-Flag

The intermediate part is our basic part K817027 with RBS B0030 in the front.

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]

Design Notes

We add constitutive promoter part J23119 and RBS part B0030 in the front of K817027 and double terminator part B0015 for backward insertion.

Method

Previous studies have shown that Penetratin can help GLP-1 to increase its penetration rate to 5% in vivo.[1] We used similar transwell penetration assay method done by others before.[2] We seeded the intestinal cells in transwells and incubated for two weeks to let them grow to form tight junctions. The transwells were put on 24 well plates and were soaked in media (DMEM). We made 10 nm GLP-1 solution mixed with different concentration of Penetratin (10 nm, 50 nm, 100 nm, 500 nm) and added it to the upper portion of transwells. After different time (1 hr, 3 hr, 5 hr, 7 hr, 9 hr) we collected small amount of media in 6 wells (the lower portion of transwells) and measured the GLP-1 concentration by ELISA. We expected to see both time course and Penetratin dose-dependent manner of GLP-1 penetration.

Protocol

A. Transwell Penetration Assay

  1. Seed Caco-2 intestinal epithelial cells on transwells, and incubate them until the resistance is greater than 1000 Ohm/cm2 (Suggesting the cells are polarized and the tight junctions are well-formed[3]).
  2. Wash the transwells with PBS for 3 times, transfer the transwells to a new 6 well plate. There are 2 mL media (DMEM) in each well of the new plate.
  3. Add 500 μL 20 nM GLP-1 (in DMEM) to each transwell, and add 500 μL Penetratin (in DMEM) in ascending orders of concentration (20nm, 100 nm, 200 nm, 1000 nm). Start to keep time.
  4. Collect 100 μL media in the lower wells at 1 hr, 3 hr, 5 hr, 7 hr, 9 hr, and keep the sample in -20℃ before ELISA.

B. ELISA

  1. Wash the wells with 250 μL Wash Buffer.
  2. Add 100 μL Assay Buffer to each well, and add 100 μL standards in ascending orders to wells, and add samples in the remaining wells.
  3. Incubate at 4℃ overnight.
  4. Decant liquid from plate.
  5. Wash 5 times with 250 μL Wash Buffer.
  6. Add 200 μL Detection Conjugate in each well. Incubate 2 hr at room temperature.
  7. Wash 3 times with 250 μL Wash Buffer.
  8. Add 200 μL diluted substrate and incubate for 20 min.
  9. Read plate on fluorescence plate reader with excitation/emission wavelength of 355 nm/460 nm.