Showing posts with label Stress Experiment. Show all posts

Wednesday, May 13, 2015

5 12 2015 TTh 310 Lab qPCR Results

Yesterday the Tuesday Thursday 310 lab ran their qPCRs for Actin, HSP70, and glutamine synthetase. I'm posting the results from their run here before posting it to Canvas.

Group 3-4
Amplification:

Melt Curve:

Group 5-6
Amplification:

Melt Curve:

Group 7-8
Amplification:

Melt Curve:

Group 9-10
Amplification:

Melt Curve:

Group 11 - 12
Amplification:

Melt Curve:

You can also see the data files for the groups here: 3-4, 5-6, 7-8, 9-10, 11-12. The raw data file can be found here.

Monday, May 11, 2015

5 8 2015 cDNA creation and Primer Check

On Friday I created cDNA using a complicated system calculate concentration and volume of RNA needed to produce equivalent concentrations of cDNA across the board.

First I need to get updated concentrations on all the RNA samples to calculate the volume needed for cDNA creation.

Sample ID	Date	ng/ul	A260	A280	260/280	260/230
42715ST1	5/8/2015	385.82	9.646	5.076	1.9	0.94
42715ST2	5/8/2015	287.1	7.178	3.929	1.83	0.71
42715ST3	5/8/2015	267.75	6.694	3.623	1.85	0.89
42715ST4	5/8/2015	322.48	8.062	4.324	1.86	0.77
42715ST5	5/8/2015	244.87	6.122	3.424	1.79	0.66
42715HT1	5/8/2015	172.11	4.303	2.502	1.72	0.57
42715HT2	5/8/2015	323.01	8.075	4.359	1.85	0.75
42715HT3	5/8/2015	141.12	3.528	1.808	1.95	1.5
42715HT4	5/8/2015	177.02	4.425	2.597	1.7	0.59
42715HT5	5/8/2015	294.26	7.357	4.019	1.83	0.72
42815SM1	5/8/2015	110.13	2.753	1.482	1.86	0.96
42815SM2	5/8/2015	43.08	1.077	0.624	1.73	0.57
42815SM3	5/8/2015	38.87	0.972	0.638	1.52	0.42
42815SM4	5/8/2015	112.83	2.821	1.738	1.62	0.42
42815SM5	5/8/2015	67.16	1.679	1.047	1.6	0.36
42815HM1	5/8/2015	52.7	1.318	0.758	1.74	0.75
42815HM2	5/8/2015	72.28	1.807	1.202	1.5	0.35
42815HM3	5/8/2015	59.05	1.476	1.043	1.42	0.26
42815HM4	5/8/2015	82.5	2.062	1.27	1.62	0.34
42815HM5	5/8/2015	128.42	3.21	1.911	1.68	0.4

Per Sam's instructions on the genefish wiki:

Use as much RNA as possible (up to 1ug); max volume of RNA = 17.75uL. Generally, identify the RNA sample with the lowest concentration and multiply by 17.75uL. Use this quantity (ug) of RNA for each and every sample.
Transfer calculated volume(s) of RNA to 0.5mL snap cap tubes or PCR plate. Adjust volumes of individual samples to 17.75uL with H2O.
Add appropriate amount of primer to sample. Use 0.25ug primer per 1ug of RNA in sample (= 0.5uL of Promega oligo dT Cat#C1101 in this example). Total volume (RNA + primers) should equal 18.25uL.

Sample SM3 was the lowest concentration on the table. To use a max of 17.75 ul of RNA I could only produce 690 ng of RNA with SM3. I set the bar to 690 ng and made the following calculations of RNA, Water, and Primer needed. SM2 and SM3 still ended up producing a volume larger than desired due to me having to use a 1:10 dilution of primer to account for the less than optimum concentration of RNA. Instead of using the standard 0.5 ul of oligo Primer, I used 0.345 which I diluted in a 1:10 ratio. For the 1:10 dilution I added 7.6 ul of oligo primer to 76 ul of water to generation 22 reactions worth of primer.

Sample ID	ng/ul	ul RNA for 690 ng	ul h20 for 17.90	1:10 primer ul	total volume
42715ST1	385.82	1.79	13.01	3.45	18.25
42715ST2	287.1	2.40	12.39	3.45	18.25
42715ST3	267.75	2.58	12.22	3.45	18.25
42715ST4	322.48	2.14	12.66	3.45	18.25
42715ST5	244.87	2.82	11.98	3.45	18.25
42715HT1	172.11	4.01	10.79	3.45	18.25
42715HT2	323.01	2.14	12.66	3.45	18.25
42715HT3	141.12	4.89	9.91	3.45	18.25
42715HT4	177.02	3.90	10.90	3.45	18.25
42715HT5	294.26	2.34	12.45	3.45	18.25
42815SM1	110.13	6.27	8.53	3.45	18.25
42815SM2	43.08	16.02	0.00	3.45	19.47
42815SM3	38.87	17.75	0.00	3.45	21.20
42815SM4	112.83	6.12	8.68	3.45	18.25
42815SM5	67.16	10.27	4.52	3.45	18.25
42815HM1	52.7	13.09	1.70	3.45	18.25
42815HM2	72.28	9.55	5.25	3.45	18.25
42815HM3	59.05	11.69	3.11	3.45	18.25
42815HM4	82.5	8.36	6.43	3.45	18.25
42815HM5	128.42	5.37	9.42	3.45	18.25

1. Added the water first

2. Added the RNA

3. Added the primer to each reaction tube.

4. Incubated in the Thermocycler for 5 minutes at 70 C

5. Immediately transferred to ice after completion.

Then I made up the reverse transcriptase master mix:

Reagents	Volume ul	Reactions X22
M-MLV RT Buffer	5	110
10 mM dNTPs	1.25	27.5
M-MLV RT	0.345	7.59
H20	0.155	3.41
Total Volume	6.75	148.5

1.Added 6.75 ul of the master mix to each tube.

2. Ran the following program on the thermocycler.

Amplify	42 C	1 hr
Inactivate	95 C	3 min

During the program run I picked up the new primers from the science depot in the med school.

I rehydrated the primer stock with Nanopure H20 since no TE was available. I determined the rehydration volume based on the nanoMolar concentrations. I then made working stock from these rehydrated stocks using a 1:10 dilution of 10 ul primer to 90 ul Nanopure H20.

Once the cDNA amplification was complete I ran a Primer/cDNA check using a qPCR and all the primers we are using for 310 lab.

Primers:

Superoxide dismutase (SD)

Glutamine synthetase (GS)

Citrate synthase (CS)

HSP70 (HSP)

Actin (ACT)

I made a Master Mix for 6 reactions for each of the 5 primers.

	Volume	Reactions X6
Ssofast Evagreen MM	10	60
FWD Primer	0.5	3
REV Primer	0.5	3
Nuclease Free H2O	8	48

I ran a template control and a positive control (Fidalgo seed oysters extracted on 3/23/2015 with a concentration of 167.3 ng/ul) for each primer as well as 4 cDNA samples I produced.

Plate layout:

8	9	10	11	12
SD	GS	CS	HSP	ACT
C-	C-	C-	C-	C-
C+	C+	C+	C+	C+
42715ST1	42715HT1	42715SM1	42715HM1	42715ST5
42715ST2	42715HT2	42715SM2	42715HM2	42715HT5
42715ST3	42715HT3	42715SM3	42715HM3	42715SM5
42715ST4	42715HT4	42715SM4	42715HM4	42715HM5

I ran the following program:

Sybr New Plate+Sybr cDNA 55 melt 2
Step	Temperature	Time
Initiation	95 C	10 min
Elongation	95 C	15 sec
	55 C	15 sec
Read
	72 C	15 sec
Read
Repeat Elongation 40 times
Termination	95 C	1 min
	55 C	1 sec
Melt Curve Manual ramp 0.2C per sec Read 0.5 C	65 - 95 C	30 sec
	21 C	10 min
End

You can see the amplification curves below:

Melt Curves:

The 3 melt curve peaks correlate with HSP70, Actin, and Glutamine synthetase primers working with the cDNA. The Superoxide dismutase and the citrate synthase primers did not work for the cDNA.

You can see the raw qPCR data here.

Moving forward, the 310 students will be running their samples using the primers today and tomorrow. I'll update the notebook with their data and some graphs to hopefully produce some interesting info about stress resilience mechanisms in the olys.

Thursday, April 23, 2015

4 23 2015 Heat/Mechanical Shock 24 Hour Time Point

Today I completed the 24 hour time point collection and the collection of the controls for the experiment. Tonight I ran out of liquid nitrogen before doing the control groups. I put them on ice and placed them in the -80 ASAP.

Heat Stress

24 hours post exposure 8 animals each pop staggered by 1 hour
- N pop first, H pop next, S pop last
- collected with ethanol flame sterilized forceps and scissors
  - tools kept in 100% EtOH
  - ran through EtOH flame
  - allow EtOH to burn off
  - Collect tissue
  - replace in 100% EtOH
  - wipe occasionally with paper towel and resterilize
- ctenidia sample (50-100 mg) homogenized in 1 ml RNAzol stored at -80°C
- 2nd ctenidia sample in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- mantle sample in 1.5 ml screw cap tube dropped into liquid nitrogen -80°C
- remaining tissue placed in 15 ml conical with 75% EtOH at -20°C
- shells placed in labeled plastic bags so correspond to sample including oyster id

Mechanical Stress

24 hours post exposure 8 animals each pop staggered by 1 hour
- N pop first, H pop next, S pop last
- collected with ethanol flame sterilized forceps and scissors
  - tools kept in 100% EtOH
  - ran through EtOH flame
  - allow EtOH to burn off
  - Collect tissue
  - replace in 100% EtOH
  - wipe occasionally with paper towel and resterilize
- ctenidia sample (50-100 mg) homogenized in 1 ml RNAzol stored at -80°C
- 2nd ctenidia sample in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- mantle sample in 1.5 ml tube dropped into liquid nitrogen - then to -80°C
- remaining tissue placed in 15 ml conical with 75% EtOH at -20°C
- shells placed in labeled plastic bags so correspond to sample including oyster id

Controls

For controls sample 8 from each group, this should be done on day 2 as less things are going on. Protocol is the same. These oyster should have remained in holding tank-throughout and should simply be removed and sampled. There is no treatment. Using sterile techniqes.

ctenidia sample (50-100 mg) homogenized in 1 ml RNAzol stored at -80°C
2nd ctenidia sample (any remaining) in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
mantle sample (50-100 mg) in 1.5 ml tube dropped into liquid nitrogen then to -80°C
remaining tissue placed in 15 ml conical with 75% EtOH at -20°C
shells placed in labeled plastic bags so correspond to sample including oyster id

Wednesday, April 22, 2015

4 22 2015 Heat/Mechanical Shock Experiment

Today I ran the Heat and Mechanical Shock experiment on my oysters. While most groups got liquid nitrogen treatment, the mechanical H and S groups did not due to lack of Liquid N2. For those samples I placed them on ice and moved them to the -80 as soon as possible. The procedure went as follows.

Pre-Experiment

Oysters

8°C
fed daily with 5-10 ml per tank commercial shellfish diet (Isochrysis 1800 mix Marine Algae)
Partial water changes once per week (remove 5 gallons, replace with fresh 5 gallons)
- Seawater from Seattle Aquarium
Aeration with aquarium aerator/stone
circulation with underwater pump
Tanks 10 gallon plastic storage tubs (costco storage tubs)

Homogenization tubes for ctenidia prelabelled with date (42215,42315), pop (N,H,S), treatment (T,M) and time point (1, 24) or Control, and oyster # (1,2,3...)

Collection 1.5 ml tubes (screw cap) for ctenidia prelabelled with date (42215,42315), pop (N,H,S), treatment (T,M) and time point (1, 24) or Control, oyster # (1,2,3...), and tissue type (C, M)

Collection 1.5 ml tubes (screw cap) for mantle prelabelled with date (42215,42315), pop (N,H,S), treatment (T,M) and time point (1, 24) or Control, oyster # (1,2,3...), and tissue type (C, M)

15 ml conical tubes for whole oyster prelabelled with date (42215,42315), pop (N,H,S), treatment (T,M) and time point (1, 24) or Control, and oyster # (1,2,3...)

Warm fresh seawater in 500 ml beaker to 38°C by immersing it in a water bath at 38°C.

Experiment

Heat Stress

22 oysters each pop in a mesh bag were lowered (stagger each pop by 1 hour) into 500 ml of prewarmed 38°C sea water (1 hr timer started)
- N pop first, H pop next, S pop last
after 1 hour exposure heat stress ends, animals returned to 8°C water.
1 hour post exposure 8 animals sampled from each group staggered by 1 hour
- N pop first, H pop next, S pop last
- collected with ethanol flame sterilized forceps and scissors
  - tools kept in 100% EtOH
  - ran through EtOH flame
  - allow EtOH to burn off
  - Collect tissue
  - replace in 100% EtOH
  - wipe occasionally with paper towel and resterilize
- ctenidia sample (50-100 mg) homogenized in 1 ml Trizol stored at -80°C
- 2nd ctenidia sample (any remaining) in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- mantle sample (decent size) in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- remaining tissue placed in 15 ml conical with 75% EtOH at -20°C
- shells in individual labeled ziploc bags so correspond to sample including oyster id

Mechanical Stress

22 oysters from 1 pop placed in bucket in centrifuge and spun for 5 minutes at 1000 rpm. Samples staggered by 1 hour. Completed after all heat shock treatments and samples were taken.
- N pop first, H pop next, S pop last
after 5 minutes of mechanical stress, animals returned to 8°C water
1 hour post exposure 8 animals sampled from each group staggered by 1 hour
- N pop first, H pop next, S pop last
- collected with ethanol flame sterilized forceps and scissors
  - tools kept in 100% EtOH
  - ran through EtOH flame
  - allow EtOH to burn off
  - Collect tissue
  - replace in 100% EtOH
  - wipe occasionally with paper towel and resterilize
- ctenidia sample (50-100 mg) homogenized in 1 ml Trizol stored at -80°C
- 2nd ctenidia sample (any remaining) in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- mantle sample (decent size) in 1.5 ml screw cap tube dropped into liquid nitrogen then to -80°C
- remaining tissue placed in 15 ml conical with 75% EtOH at -20°C
- shells in individual labeled ziploc bags so correspond to sample including oyster id