Noi/NOTES/2014-2-28: Difference between revisions
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>Noi mNo edit summary |
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Starting material: 200ul for blood, plasma, serum or buffy coat | Starting material: 200ul for blood, plasma, serum or buffy coat | ||
==== Procedures ==== | ==== Procedures ==== | ||
:: - Pipet 20 µl QIAGEN Protease (or proteinase K) into the bottom of a 1.5 ml tube | |||
:: - Add 200 µl sample to the tube. If the volume of sample less than 200ul, adjust volume with PBS | |||
:: - Add 200 µl Buffer AL to the sample. Mix by pulse-vortexing for 15 s | |||
:: - Incubate at 56°C for 10 min | |||
:: - Briefly spin down the tube before adding 200ul 100% EtOH. Mix again by pulse-vortexing for 15 s and briefly spin down | |||
:: - Transfer spnt to QIAamp Mini spin column & centrifuge at 6,000xg for 1 min | |||
:: - Transfer QIAamp Mini spin column in a clean 2 ml collection tube | |||
:: - Add 500 µl Buffer AW1 & centrifuge at 6,000xg for 1 min | |||
:: - Transfer QIAamp Mini spin column in a clean 2 ml collection tube | |||
:: - Add 500 µl Buffer AW2 & centrifuge at 20,000xg for 3min | |||
:: - Transfer the QIAamp Mini spin column in a new 2 ml collection tube and centrifuge at 20,000xg for 1 min (full speed) | |||
:: - Place the QIAamp Mini spin column in a clean 1.5 ml tube & add appropriate volume of Buffer AE or distilled water (manual recommends 200ul). | |||
:: - Incubate at RT for 5 min & centrifuge at 6,000xg for 1 min | |||
<br> | <br> | ||
=== 2. NucleoSpin® Plasma XS kit === | === 2. NucleoSpin® Plasma XS kit === | ||
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Elution volume: 5–30 μL | Elution volume: 5–30 μL | ||
Average yield: 0.1–100 ng per mL plasma | Average yield: 0.1–100 ng per mL plasma | ||
DNA size range: 50-1000bp | |||
DNA yield from human plasma: DNA amounts from less than 0.1 ng DNA per mL of plasma up to several 100 ng DNA per mL of plasma have been reported | DNA yield from human plasma: DNA amounts from less than 0.1 ng DNA per mL of plasma up to several 100 ng DNA per mL of plasma have been reported | ||
==== Procedures ==== | |||
* To remove residual cells, centrifuge plasma/serum at >11,000xg for 3 min | |||
:: - Add240ul of plasma/serum to 1.5mL tube. | |||
:: - Add 20ul '''proteinase K''' to plasma/serum sample | |||
:: - Mix and incubate at 37C for 10min | |||
:: - Add 1.5 volume (360ul) of '''buffer BB''' (keep sample:binding buffer ration 1:1.5 v/v) | |||
:: - Invert the tube 3x and vortex for 3s. Spin down the tube briefly. | |||
:: - Load 600ul of the mixture to a Nucleospin Plasma XS column | |||
:: - Centrifuge at 2,000xg for 30s. Centrifuge at higher speed at 11,000xg for further 5s. | |||
:: - Transfer Nucleospin column to a new collecting tube | |||
:: - Add 500ul of '''buffer WB''' onto the column. Centrifuge at 11,000xg for 30s. | |||
:: - Place column into new collecting tube | |||
:: - Add 250ul of '''buffer WB''' to the column. Centrifuge at 11,000xg for 3min | |||
:: - Place column to 1.5mL tube | |||
:: - Add 20ul '''Elution buffer''' to the column (range 5-30ul) | |||
:: - Centrifuge at 11,000xg for 30s | |||
:: - Incubate eluted DNA with open lid at 90C for 8min to remove residual ethanol | |||
== Bead-based methods == | == Bead-based methods == | ||
=== 3. ChargeSwitch® gDNA 1 ml Serum kit === | === 3. ChargeSwitch® gDNA 1 ml Serum kit === |
Revision as of 19:43, 2 March 2014
MONOD test on human plasma/serum
- Note from Dr. Zhang
- " We will get some human plasma and serum from cancer center for the MONOD project. This would be different from all the BSPP experiments we did before, as we are dealing with circulating cell-free DNA from human patients.
- One major challenge is to recover enough DNA for BSPP, as the yield of DNA extraction from plasma/serum is very low in general, and seems to be quite variable depending on the DNA extraction kits (we don’t want whole blood or buffy coats as they contain mostly white blood cells).
- We will received a set of four tubes of plasma from one individual, and another four tubes of serum from another. Each tube has roughly 200ul of biofluid.
- I’ve ordered four kits (QIAamp blood mini, Lifetech ChargeSwitch, Clontech Nucleospin, ZymoBead). Our first step is to determine the yields with these kits, and for the bead-based kits, to try direct bisulfite conversion of DNA on the beads without washing and elution.
- Please keep track of the kits when they arrive, and write up an experimental protocol based on the manuals of these kits. The materials are precious so please confirm the plan with me before processing the samples. We will do picogreen quantification and Bioanalyzer analysis to determine the yield and size distribution (cell-free DNA are fragmented in general). We can move forward with BSPP if there is enough material.
- We will received a set of four tubes of plasma from one individual, and another four tubes of serum from another. Each tube has roughly 200ul of biofluid ".
Kit | Vendor | Catalog # | Protocol | Note |
QIAamp DNA Blood Mini Kit (50) | QIAGEN | 51104 | QIAamp Blood Mini Kit Manual | Column-based method, page 26-28 |
ChargeSwitch® gDNA Serum Kit, 0.2-1 mL | Life Technologies | CS11040 | ChargeSwitch® gDNA Serum Kit Manual | Bead-based method |
NucleoSpin® Plasma XS | Fisher Scientific/Marcherey Nagel | NC9959409 | NucleoSpin® Plasma XS kit manual | Column-based method, Estimeted delivert date: 2014-03-14 |
ZymoBead™ Genomic DNA Kit | Zymo Research | D3004 | ZymoBead™ Genomic DNA Kit manual | Bead-based method |
Experimental plan
- I will confirm with Dr. Zhang about the volume of serum/plasma to use for each kit since each one uses different volume. Shall I used recommended volume of each kit and then compare the yield to normalized input?
Column-based methods
1. QIAamp DNA Blood Mini Kit
- - Resuspend lyophilized QIAGEN Protease with 1.2 ml protease solvent.
- - Use carrier DNA (e.g., poly dA, poly dT, poly dA:dT) when the sample is low-copy (i.e., when <10,000 copies are present)
Starting material: 200ul for blood, plasma, serum or buffy coat
Procedures
- - Pipet 20 µl QIAGEN Protease (or proteinase K) into the bottom of a 1.5 ml tube
- - Add 200 µl sample to the tube. If the volume of sample less than 200ul, adjust volume with PBS
- - Add 200 µl Buffer AL to the sample. Mix by pulse-vortexing for 15 s
- - Incubate at 56°C for 10 min
- - Briefly spin down the tube before adding 200ul 100% EtOH. Mix again by pulse-vortexing for 15 s and briefly spin down
- - Transfer spnt to QIAamp Mini spin column & centrifuge at 6,000xg for 1 min
- - Transfer QIAamp Mini spin column in a clean 2 ml collection tube
- - Add 500 µl Buffer AW1 & centrifuge at 6,000xg for 1 min
- - Transfer QIAamp Mini spin column in a clean 2 ml collection tube
- - Add 500 µl Buffer AW2 & centrifuge at 20,000xg for 3min
- - Transfer the QIAamp Mini spin column in a new 2 ml collection tube and centrifuge at 20,000xg for 1 min (full speed)
- - Place the QIAamp Mini spin column in a clean 1.5 ml tube & add appropriate volume of Buffer AE or distilled water (manual recommends 200ul).
- - Incubate at RT for 5 min & centrifuge at 6,000xg for 1 min
2. NucleoSpin® Plasma XS kit
Product specifications Starting material: Up to 240 μL EDTA plasma Elution volume: 5–30 μL Average yield: 0.1–100 ng per mL plasma DNA size range: 50-1000bp DNA yield from human plasma: DNA amounts from less than 0.1 ng DNA per mL of plasma up to several 100 ng DNA per mL of plasma have been reported
Procedures
- To remove residual cells, centrifuge plasma/serum at >11,000xg for 3 min
- - Add240ul of plasma/serum to 1.5mL tube.
- - Add 20ul proteinase K to plasma/serum sample
- - Mix and incubate at 37C for 10min
- - Add 1.5 volume (360ul) of buffer BB (keep sample:binding buffer ration 1:1.5 v/v)
- - Invert the tube 3x and vortex for 3s. Spin down the tube briefly.
- - Load 600ul of the mixture to a Nucleospin Plasma XS column
- - Centrifuge at 2,000xg for 30s. Centrifuge at higher speed at 11,000xg for further 5s.
- - Transfer Nucleospin column to a new collecting tube
- - Add 500ul of buffer WB onto the column. Centrifuge at 11,000xg for 30s.
- - Place column into new collecting tube
- - Add 250ul of buffer WB to the column. Centrifuge at 11,000xg for 3min
- - Place column to 1.5mL tube
- - Add 20ul Elution buffer to the column (range 5-30ul)
- - Centrifuge at 11,000xg for 30s
- - Incubate eluted DNA with open lid at 90C for 8min to remove residual ethanol
Bead-based methods
3. ChargeSwitch® gDNA 1 ml Serum kit
- - Upon receipt, store proteinase K at 4C
Product Specifications Starting Material: 0.2-1 ml of fresh or frozen human serum, with or without EDTA Elution Volume: 50 μl DNA Yield: 1-200 ng DNA Size: 50 bp-1.5 kb