Tag Archives: withering syndrome

qPCR – Check New Withering Syndrome p18RK7 Plasmid Standard Curve Dilution

This is a qPCR to test the fresh p18RK7 dilution I made earlier today, and verify it works well (i.e. linear spread, good R^2 value, same Cqs as previous curve dilution, etc.).

Master mix calcs were re-used from previous standard curve check (Google Sheet): 20161128 – qPCR WS p18RK7 Curve Check

I made three separate master mixes to check the curve three times.

All samples were run in duplicate. Plate layout, cycling params, etc. are in the qPCR Report (see Results below).

Baseline threshold was manually set to 580, as previously determined by Lisa for this assay.

Results:

qPCR Report (PDF): Sam_2017-07-03 09-34-31_CC009827.pdf
qPCR Data File (CFX): Sam_2017-07-03 09-34-31_CC009827.pcrd

Curve looks good! Will use this one going forward. Will store in the withering syndrome standard curve box in the FSH 240 4C.

 

ALL MIXES

 

Share

Sample Prep – Withering Syndrome p18RK7 Plasmid Standard Curve Dilution

The last dilution I made was jacked up, so I made a new one today.

Used the 3e7 dilution of p18RK7 from 20161128 as the “stock” to make serial, 1:10 dilutions (final volume of 1000uL in each tube).

I prepared the dilution series using lab-made Low TE Buffer (pH=8.0). The original dilution worksheet below was set up by Nate Wight many, many, moons ago.

Dilution calcs (Google Sheet): 20160316 – WS p18RK7 plasmid dilution table

Will test out the new curve dilution shortly.

Share

Sample Prep – Withering Syndrome p18RK7 Plasmid Standard Curve Dilution

The withering syndrome standard curve on my last two qPCRs has been wonky, so I’m making a new curve.

Used the 3e7 dilution of p18RK7 from 20161128 as the “stock” to make serial, 1:10 dilutions (final volume of 1000uL in each tube).

I prepared the dilution series using IDTE (pH=8.0; IDT) Buffer. The original dilution worksheet below was set up by Nate Wight many, many, moons ago.

Dilution calcs (Google Sheet): 20160316 – WS p18RK7 plasmid dilution table

Will test out the new curve dilution shortly.

Share

DNase Treatment – Water Filter RNA from 20161130

Continued preparation of this RNA to assess withering syndrome viability in the water column. I treated the RNA I isolated on 20161130 using the Turbo DNA-free (Ambion) DNase kit, according to their protocol.

Added the following to each sample:

  • 2.5μL 10x buffer
  • 1.5μL H2O
  • 1μL DNase

Incubated @ 37C for 1hr.

Added 0.1 volumes (2.5μL) of DNase Inactivation reagent and incubated at RT for 2mins (with mixing). Pelleted inactivation reagent: 10,000g, 2mins, RT. Transferred supe to new tube.

Samples were labelled as “DNased RNA”, their existing sample name (see below), and stored @ -80C.

Sample names:

  • T0A
  • T0B
  • T1A
  • T1B
  • T1A C
  • T1B C
  • T3A
  • T3B
  • T7A
  • T7B
  • T7A C
  • T7B C
Share

RNA Isolation – Abalone Water Filters

Lisa provided me with a set of water filters stored in 1mL RNAzol RT @ -80C to isolate RNA from. This is an attempt to assess withering syndrome viability from within the water.

The samples were thawed and briefly homogenized (as best I could) with a disposable plastic pestle. The samples were then processed according to the manufacturer’s protocol for total RNA isolation. Samples were resuspended in 20μL of 0.1%-DEPC H2O.

Samples were stored @ -80C. Will DNase next week.

The sample names are as follows (the ‘C’ is short for “Control”, per Lisa):

  • T0A
  • T0B
  • T1A
  • T1A C
  • T1B C
  • T3A
  • T3B
  • T7A
  • T7B
  • T7A C
  • T7B C

 

Share

Sample Prep – Withering Syndrome p18RK7 Plasmid Standard Curve Dilution

Lisa recently ran a qPCR and noticed that the standard curve had drifted quite a bit and was no longer usable, so I’m making more.

Used NcoI-linearized p18RK7 abalone withering syndrome plasmid (from 20120726) to make a fresh dilution series. The plasmid was most recently re-assessed and successfully used for a new standard curve on 20160316. As such, I re-used the dilution calculations from 20160316 (see sheet below).

I prepared the dilution series using IDTE (pH=8.0; IDT) Buffer. The dilution worksheet below was set up by Nate Wight many, many, moons ago.

Dilution calcs (Google Sheet): 20160316 – WS p18RK7 plasmid dilution table

Share

DNA Extraction – Ava Withering Syndrome Transmission Study Feces

Isolated DNA from 36 fecal samples provided by Ava. Fecal samples were on filters stored at -80C. Samples were thawed slightly to allow unrolling of the filters. Feces was transferred to pre-weighed tubes and then weighed.

DNA was extracted using the QIAmp Fast DNA Stool Mini Kit (Qiagen) following the manufacturer’s protocol with the following options:

  • Samples were incubated at 95C to maximize cell lysis
  • Followed “human DNA analysis” protocol for remainder of protocol (to maximize sample recovery)
  • Eluted DNA with 100μL Buffer ATE

Samples were stored at 4C in FSH240 in the boxes “Ava WS Transmission DNA Extractions by Sam Box 2″. See the master spreadsheet at the bottom of this post for specific sample locations within this box.

Samples will be quantified tomorrow.

See two pictures below for potential anomalous samples.

This sample had a date of 9/24/15. Possibly incorrect, as no other samples have this date.

 

 

This sample contained no feces at all. Additionally, the filter was a different type than all the other fecal samples. It looks like a water sample filter. Collected liquid from filter and processed that.

 

Master spreadsheet for these, and future, samples for this project (Google Sheet): Ava WS Transmission DNA Extractions

Share

DNA Extraction – Ava Withering Syndrome Transmission Study Feces

Isolated DNA from 4 fecal samples provided by Ava. Fecal samples were on filters stored at -80C. Samples were thawed slightly to allow unrolling of the filters. Feces was transferred to pre-weighed tubes and then weighed.

DNA was extracted using the QIAmp Fast DNA Stool Mini Kit (Qiagen) following the manufacturer’s protocol with the following options:

  • Samples were incubated at 95C to maximize cell lysis
  • Followed “human DNA analysis” protocol for remainder of protocol (to maximize sample recovery)
  • Eluted DNA with 100μL Buffer ATE

Samples were stored at 4C in FSH240 in the boxes “Ava WS Transmission DNA Extractions by Sam Box 2″. See the master spreadsheet at the bottom of this post for specific sample locations within this box.

Master spreadsheet for these, and future, samples for this project (Google Sheet): Ava WS Transmission DNA Extractions

Share

DNA Extraction & Quantification – Ava Withering Syndrome Transmission Study Tissues

Isolated DNA from 35 tissue samples provided by Ava. Presumably, the tissues were digestive gland and I believe they were preserved in ethanol. The list of samples are listed below.

DNA was extracted using the QIAmp Fast DNA Stool Mini Kit (Qiagen) following the manufacturer’s protocol with the following options:

  • Samples were briefly homogenized (due to their stiffness resulting from ethanol fixation) in the InhibitEX Buffer using disposable plastic pestles.
  • Homogenized tissue was incubated at 95C to maximize cell lysis
  • Followed “human DNA analysis” protocol for remainder of protocol (to maximize sample recovery)
  • Eluted DNA with 100μL Buffer ATE

After extraction, the samples were quantified using the Roberts Lab Qubit 3.0 (Life Technologies) using the Qubit ds DNA BR reagents. Used 1μL of each sample.

Samples were stored at 4C in FSH240 in the boxes “Ava WS Transmission DNA Extractions by Sam Box 2″. See the master spreadsheet at the bottom of this post for specific sample locations within this box.

Results:

Raw Qubit Readout (Google Sheet): 20160817_DNA_quant_Qubit_Ava_abalone_WS

Master spreadsheet for these, and future, samples for this project (Google Sheet): Ava WS Transmission DNA Extractions

Share

DNA Extraction – Ava Withering Syndrome Transmission Study Tissues

Isolated DNA from 30 tissue samples provided by Ava. Presumably, the tissues were digestive gland and I believe they were preserved in ethanol. The list of samples are listed below.

DNA was extracted using the QIAmp Fast DNA Stool Mini Kit (Qiagen) following the manufacturer’s protocol with the following options:

  • Samples were briefly homogenized (due to their stiffness resulting from ethanol fixation) in the InhibitEX Buffer using disposable plastic pestles.
  • Homogenized tissue was incubated at 95C to maximize cell lysis
  • Followed “human DNA analysis” protocol for remainder of protocol (to maximize sample recovery)
  • Eluted DNA with 100μL Buffer ATE

Samples will be quantified later today.

Samples were stored at 4C in FSH240 in the boxes “Ava WS Transmission DNA Extractions by Sam Box 1 & Box 2″. See the master spreadsheet at the bottom of this post for specific sample locations within this box.

Master spreadsheet for these, and future, samples for this project (Google Sheet): Ava WS Transmission DNA Extractions

Share