Real-Time Reverse Transcriptase PCR for the Detection of Bluetongue Virus

Oligo name
Sequence (5′–3′)
Working concentration (μM)
Primer Hofm_BTV_IVI_F2
TGG AYA AAG CRA TGT CAA A
20
Primer Hofm_BTV_IVI_R2
ACR TCA TCA CGA AAC GCT TC
20
Probe Hofm_BTV_IVI_Pa
FAM-ARG CTG CAT TCG CAT CGT ACG C-Tamra
5
aProbe labeled with FAM (carboxyfluorescein) fluorophore and Tamra quencher
 
8.
Aerosol-resistant pipette tips.
 
9.
Adhesive PCR film.
 
10.
Marker pens (waterproof) and adhesive labels.
 

2.2 Equipment

1.
PCR cabinet.
 
2.
Calibrated pipettes.
 
3.
Freezer (−5 to −30 °C).
 
4.
Refrigerator (1–8 °C).
 
5.
Ice bucket with ice.
 
6.
Large capacity centrifuge.
 
7.
Real-time PCR machine.
 

3 Methods

3.1 Sample Preparation

1.
dsRNA from BTV test samples should be prepared as per standard methods (e.g., Qiagen/Roche viral nucleic acid extraction kits) and stored at −50 to −90 °C. BTV negative and positive control samples of known origin should also be prepared (see Note 2 ).
 

3.2 Assay Setup

1.
In a PCR clean room, prepare the one-step real-time RT-PCR reaction master mix according to Table 2. Sufficient volume of the master mix should be prepared to allow for testing of the required number of samples (see Note 3 ).
Table 2
Composition of the master mix for one-step real-time RT-PCR
Master mix composition
Volume for 1 reaction (μl)
2× Superscript III RT-PCR reaction mix
12.5
Primer Hofm_BTV_IVI_F2 (20 μM)a
0.5
Primer Hofm_BTV_IVI_R2 (20 μM)a
0.5
Probe Hofm_BTV_IVI_P (5 μM)a
1.0
RNase-free water
2.5
2.5 μM ROX l
0.5
50 mM MgSO4
1.0
Superscript III RT/Platinum Taq
0.5
Total volume
19
aThe final concentration of the primers and probe per reaction is 0.4 μM and 0.2 μM, respectively
 
2.
Working in a clean laminar flow cabinet (see Note 4 ), add all reagents to a suitable container (e.g., microcentrifuge tube) allowing for the total volume of reagents (see Note 5 ). Mix the reagents gently with a pipette. Once outside the PCR clean room, maintain the master mix on ice and shielded from light.
 
Mar 17, 2017 | Posted by in GENERAL | Comments Off on Real-Time Reverse Transcriptase PCR for the Detection of Bluetongue Virus

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