LM DNA Kit Product Insert

LM DNA Kit Product Insert
Immucor Transplant Diagnostics, Inc.
550 West Avenue, Stamford, CT 06902 USA
Tel: (203) 328-9500 or (888) 329-0255, Fax: (203) 328-9599
WWW.IMMUCOR.COM
Product Documentation available at: www.Immucor.com
PRODUCT
INSERT
LIFECODES ® HLA-SSO TYPING KITS
For RESEARCH USE ONLY, NOT FOR USE IN DIAGNOSTIC PROCEDURES
TABLE OF CONTENTS
Definition of Symbols………………..……………..
1
Reagents by Catalog Number………..…………...
2
Directions for Use…………………………………
A.
4
Purify Genomic DNA…………………..…
4
B. Amplification……………………………….
4
Summary and Explanation………………..……..
3
C. Hybridization………………………………..
5
Principles of the Procedure……………………..…
3
D. Analyze with Luminex Instrument………
6
Reagents……………………………………………….
3
Results…………………………………………….….
6
A. Identification…………………….…………...
3
Quality Control…………………………………..…
7
B. Warnings and Cautions……………….…….
3
Limitation of the Procedure………………..……
7
C. Storage Instructions…………………….…
3
Troubleshooting……………………………………
7
D. Purification or Treatment for Use………….
3
Expected Values……………………………………
8
E. Instability Indications…………………..……
3
Instrument Requirements…………………………
3
References…………………………………………..
8
Specimen Collection and Preparation…………
3
Limited License Information………….…………
8
Procedure……………………………………………
4
Trademarks Used……………………………..……
8
A. Materials Provided………………………………
4
Appendix A…………………………………..………
9
B. Materials, Reagents and Equipment required,
but not provided………………………………
4
Gel Electrophoresis………………………………
9
Gel Interpretation………………………….………
9
C. Additional Materials to be provided by the User
4
DEFINITION OF SYMBOLS (Product Labels and Supplemental Documents)
Batch Code
Catalog
Number
Temperature
limitations
Upper limit of
temperature
Use By
Date
Keep away
from light
Sufficient for N
Tests
Do Not Freeze
Caution –
See
instructions
for Use
Consult
instructions
for use
Manufacturer
Danger
Page 1 of 9
LC1436RUO.4 (05/15)
KITS/REAGENTS BY CATALOG NUMBER
LCT-DQAB LIFECODES HLA-DQA1/B1 SSO Typing Kit, Catalog # 628930R
LC-DQAB LIFECODES HLA-DQA1/B1 Typing Kit for use with Luminex
Reagent
MX-DQAB
BM-DQAB
DS
TAQ
Product # 200210-50R
Product Number Fill volume
LIFECODES HLA DQA1/B1 Master Mix
LIFECODES HLA DQA1/B1 Probe Mix
‡
Dilution Solution
LIFECODES Taq Polymerase
Storage
50
200200
870 µL
2 to 8°C
200201
810 µL
2 to 8°C
Protect From Light
628515
19.7 mL
18 to 30ºC
628076
25 µL
-10ºC to -30ºC
Sufficient for 50
samples
General Purpose
Reagent
LCT-DPAB LIFECODES HLA-DPA1/B1 SSO Typing Kit, Catalog # 628936R
LC-DPAB LIFECODES HLA-DPA1/B1 Typing Kit for use with Luminex
Reagent
Product # 200110-50R
Product Number Fill volume
Storage
MX-DPAB
LIFECODES HLA DPA1/B1Master Mix
200100
870 µL
2 to 8°C
BM-DPAB
LIFECODES HLA DPA1/B1 Probe Mix
200101
810 µL
2 to 8°C
Protect From Light
Dilution Solution
628515
19.7 mL
18 to 30ºC
628076
25 µL
-10ºC to -30ºC
DS
TAQ
LIFECODES Taq Polymerase
50
Sufficient for 50
samples
General Purpose
Reagent
LCT-DQA LIFECODES HLA-DQA1 SSO Typing Kit, Catalog # 628933
LM-DQA LIFECODES HLA-DQA Typing Kit for use with Luminex
Reagent
Product # 628061R
Product Number Fill volume
Storage
MX-DQA
LIFECODES HLA DQA Master Mix
628062
420 µL
2 to 8°C
BM-DQA
LIFECODES HLA DQA Probe Mix ‡
628063
360 µL
2 to 8°C
Protect From Light
DS
Dilution Solution
628155
9.9 mL
18 to 30ºC
TAQ
LIFECODES Taq Polymerase
628076
25 µL
-10ºC to -30ºC
20
Sufficient for 20
samples
General Purpose
Reagent
LCT-DPB LIFECODES HLA-DPB1 SSO Typing Kit, Catalog # 628937
LM-DPB LIFECODES HLA-DPB Typing Kit for use with Luminex
Reagent
Product # 628910 R
Product Number Fill volume
Storage
MX-DPB
LIFECODES HLA DPB Master Mix
628903
420 µL
2 to 8°C
BM-DPB
LIFECODES HLA DPB Probe Mix ‡
628902
360 µL
2 to 8°C
Protect From Light
DS
Dilution Solution
628155
9.9 mL
18 to 30ºC
TAQ
LIFECODES Taq Polymerase
628076
25 µL
-10ºC to -30ºC
20
Sufficient for 20
samples
General Purpose
Reagent
‡
Probe Mixes are light sensitive: keep exposure to light at a minimum.
CAUTION: Do not use components past their expiration dates.
Page 2 of 9
LC1436RUO.4 (05/15)
SUMMARY AND EXPLANATION
DNA-based HLA typing using PCR amplified DNA is a common laboratory procedure. PCR amplification of DNA is used as the means to enrich for a selected
DNA region. For HLA typing, a subsequent assay is utilized to determine the properties of the amplified DNA. Several types of assays, such as SSP (1), direct
SSOP (2), RFLP (3) and reverse SSOP dot blot technologies (4), have been used in HLA typing. Like SSOP and reverse dot blot methods, LIFECODES HLASSO Typing kits utilize sequence-specific oligonucleotides (SSOs) to identify which HLA alleles are present in a PCR amplified sample. It is the set of SSOs
employed, not the methodologies that determines the ability to distinguish among the various alleles present in the PCR amplification. Whereas reverse dot blot
and SSOP methods employ enzyme labels and colorimetric substrates that require subsequent development, the LIFECODES assay is a homogenous multiplex
system. That is, all SSOs are analyzed simultaneously and the entire assay is carried out in a single reaction vessel with the addition of a single reagent.
PRINCIPLES OF THE PROCEDURE
The LIFECODES HLA-SSO Typing procedure is based on the hybridization of labeled single stranded PCR product to SSO probes. Amplification of DNA using
PCR typically employs equimolar amounts of both forward and reverse primer to generate a double-stranded DNA product. However, if the amount of one primer
is in excess relative to the other, the reaction will generate some single-stranded DNA product in addition to double-stranded product. During the initial cycles of
the LIFECODES amplification step, double-stranded DNA is generated. Once the limiting primer is exhausted, the remaining primer uses the double-stranded
product as a template for generation of single-stranded DNA. This method generates both double stranded and single stranded products that upon denaturation,
will both participate in the hybridization reaction.
Each of the different probes may be homologous to a sequence within the amplified DNA that is unique to an allele or group of alleles. In other words, these
probes are designed so that each probe preferentially hybridizes to a complementary region that may or may not be present in the amplified DNA. In addition,
the amplified DNA is also hybridized to one or more Consensus probes homologous to sequences present in all the alleles of a locus. SSO Typing can be
affected by the type of biological material, method of purification, amount and integrity of genomic DNA. Therefore, the signal obtained for the Consensus
probe(s) can serve as an indicator of the success of the amplification and hybridization procedures. Also, the signal obtained with the Consensus probe can be
used to normalize the signal of the allele specific probes and correct for variations in the amount of amplified product in the hybridization reaction. The analysis
of the results generated from the SSO typing can be used to determine the presence or absence of particular DNA sequences in amplified DNA and to identify
the possible alleles in the sample.
For the LIFECODES HLA-SSO Typing procedure, probes are attached to Luminex Microspheres designed for use with the Luminex Instrument. Up to 100
different populations of Luminex Microspheres can be mixed together and analyzed by the Luminex Instrument because each population of microspheres can be
distinguished by its unique fluorescence signature or color. A different SSO probe can be attached to each color microsphere. Therefore, a mixture of several
probes can be distinguished from each other by virtue of their association with particular color microspheres. The Luminex Instrument is also able to quantify the
relative amounts of labeled PCR product hybridizing to each Luminex Microsphere. Therefore, the relative signal obtained with the SSO probes in the
LIFECODES assay, as with other SSOP methods, can be used to assign the probes as having positive or negative reactivity with the amplified DNA sample (see
Results section). This in turn provides the information needed to determine the HLA phenotype of the sample.
REAGENTS
A. Identification
See tables in Reagents by Catalog Number section for complete listing of products and catalog numbers.
B. Warnings or Cautions
1.
2.
3.
4.
For Research Use Only. Not for use in diagnostic procedures.
Separate pipettes should be designated for Pre-PCR manipulations as well as for Post-PCR manipulations.
Biohazard: All biological and blood samples should be treated as potentially infectious. Use Universal Precautions when handling.
Dilution Solution, Probe mixes, Taq Polymerase and R-Phycoerythrin Conjugated Streptavidin contain hazardous compounds. Avoid contact
with skin and eyes and dispose of all materials after use according to local regulations. See Material Safety Data Sheets for additional
information.
C. Storage Instructions
1.
2.
3.
Refer to kit component packaging label for proper storage temperatures.
Probe mixes and R-Phycoerythrin Conjugated Streptavidin are light sensitive, KEEP FROM LIGHT; DO NOT FREEZE.
Do not use components past their expiration date.
D. Purification or Treatment Required for Use
See “Specimen Collection and Preparation.”
E. Instability Indications
1.
2.
If salts have precipitated out of solution during shipping or storage, resolubilize completely prior to use by vortexing at room temperature
(18 to 30°C).
Do not use R-Phycoerythrin Conjugated Streptavidin that has been frozen during shipment or storage.
INSTRUMENT REQUIREMENTS
1.
2.
Luminex Instrument and XY Platform (Product Number 888300, 888310)
The following Thermal Cyclers have been validated: 96-Well GeneAmp® PCR System 9700 set to MAX mode (Base Cat # N8050200, Gold Block Cat
#4314878), Veriti™ 96-Well Thermal Cycler set to 9700 MAX mode (Cat #4375786). Refer to Table 2 for maximum ramp speeds.
SPECIMEN COLLECTION AND PREPARATION
a.
b.
c.
d.
e.
f.
g.
Human DNA can be purified from Whole blood, Buffy coats and Buccal swabs using a validated method that meets the criteria below.
DNA extracted from blood preserved in EDTA and ACD (Acid Citrate Dextrose) have been tested and shown to yield expected performance
in this assay. DNA extracted from blood preserved in heparin cannot be used in this assay. Other preservatives have not been tested.
The isolated DNA should be in 10 mM TRIS, pH 8.0-9.0, or in nuclease free water. If a chelating agent such as EDTA is present the final
concentration of the chelating agent should not exceed 0.5 mM.
The presence of alcohol, detergents or salts may adversely affect DNA amplification.
Final DNA concentration should be 10 to 200 ng/µL.
Absorbance measurements of the DNA sample at 260 and 280nm should give a ratio of 1.65 to 2.0.
DNA can be used immediately after isolation or stored at –20ºC for up to 1 year. Repeated freeze/thawing should be avoided since this can
result in DNA degradation.
Page 3 of 9
LC1436RUO.4 (05/15)
PROCEDURE
A. Materials Provided
(See tables in Reagents by Catalog Number section for specific information)
•
Threshold Table(s), Probe Hit Chart(s)
Appropriate Master Mix (MX)
•
LIFECODES Taq Polymerase* (LIFECODES Cat. No 628076)
Appropriate Probe Mix (BM)
Dilution Solution (DS)
•
•
•
B. Materials, Required, but Not Provided
The following are recommended for use with the kit:
Luminex Sheath Fluid (1x LIFECODES Cat. No. 628005)
Nuclease-free water (LIFECODES Cat. No. 757003; 20mL)
®
PCR tubes and caps - Corning Thermowell Tube Strips
(Costar® Cat. No. 6542, LIFECODES Cat. No. 888640) or
®
Corning Thermowell PCR 96 well plates (Cat. No.
®
CLS6551) or Themoscientific AB Gene Superplate 96-well
PCR plate (Cat. No. AB-2100)
Costar® plate (Costar® Cat. No. 6509, LIFECODES Cat. No.
888630)
•
•
•
•
•
•
•
Thermowell Clear Polyethylene Tape (Costar® No. 6524
(LIFECODES Cat. No. 888635 )
R-Phycoerythrin Conjugated Streptavidin (SA-PE), 1mg/mL
(LIFECODES Cat No. 628511)
Luminex Calibration Kits (Luminex 100/200 Calibration Kit,
Luminex 100/200 Performance Verification Kit, LIFECODES
Cat. Nos. 628018 and 628019 respectively)
C. Additional Materials to be provided by the user
Vortex Mixer
Silicone compression Mat. Axygen Scientific , # CM-FLAT, or equivalent
Bath Sonicator
Microcentrifuge Barrier filter tips
Pipettors, Multichannel pipettors and tips (1-20µL, 20-200µL, 1000µL)
Spreadsheet analysis software
Heat Block
70% Isopropanol or 20% Bleach
Retainer tray – Applied Biosystems #403081 (for use with the 9700 thermal cycler only)
•
•
•
•
•
•
•
•
•
DIRECTIONS FOR USE
NOTES:
•
•
•
•
•
•
•
Probe mixes and SA-PE are light sensitive: keep away from light and do not freeze.
Warm beads at 55º to 60ºC for at least 5 -10 minutes to thoroughly solubilize components in probe mixture.
Sonicate briefly (~15 sec), then vortex probe mix for about 15 seconds to thoroughly suspend the beads.
Take extreme caution in the aliquoting process, using calibrated pipettes. Failure to do so may result in reagent loss and sample
failure.
All temperatures must be precisely maintained. Fluctuations as little as +/- 0.5°C can affect results.
At the hybridization stage, samples should not remain in the diluted state at 56°C for more than 5 minutes (see Results section).
It is recommended to assay the amplified samples as soon as possible. If the samples cannot be run on the Luminex Instrument the
same day, the amplified product can be stored up to 3 days at 2-8ºC prior to use. For longer storage, store at –20ºC up to one
week until ready to assay. The amplified product can only be frozen and thawed once. Repeated freezing and thawing will
result in degradation of amplified samples and will yield poor results if assayed.
A. Purify genomic DNA, using method of choice; final concentration should be 10 to 200 ng/µL. Adjust, if necessary, with nuclease
free water. Keep all samples at similar concentrations.
B. DNA amplification (PCR)
1. Allow the Master Mix to warm to room temperature (18 to 30°C).
2. Gently vortex for approximately 10 seconds. This will ensure the salts are in solution. Spin briefly (5 – 10 seconds) in microcentrfuge to
bring contents to the bottom of the tube.
3. Using Table 1 below, prepare the components for amplification for n+1 reactions using the indicated amount of each component per
reaction (except for DNA). Bring to a final volume of 20µL per reaction with nuclease free water. Gently vortex.
4. Pipette the appropriate amount of Genomic DNA (40 to 120ng) into the PCR tubes.
5. Aliquot the amplification mix into the PCR tubes containing the genomic DNA. (The total volume of amplification mix and genomic DNA
should equal 20µL for each sample reaction.)
6. Cap tubes tightly to prevent evaporation during PCR.
7. Place samples in the thermal cycler and run program, see Table 2 and 3.
Page 4 of 9
LC1436RUO.4 (05/15)
Table 1. Reaction Components for Amplification
Component
Amount per PCR sample reaction
LIFECODES Master Mix
6µL
Genomic DNA 10-200ng/µL
Total of ~80ng
LIFECODES Taq Polymerase
0.2µL (1U)
Nuclease-free water
To 20µL final volume
Table 2. Thermal Cycler Conditions for Amplification
Thermal Cycler
Mode (Ramp speed)
MAX mode
GeneAmp® PCR System 9700
(3.9°C/sec)
9700 MAX mode
Veriti™ 96-Well Thermal Cycler
(3.9°C/sec)
Table 3. Thermal Cycler Conditions for Amplification
Step
Temperature and Incubation Time
# of Cycles
1
95º C for 3 min
1
95º C for 15 sec
2
60º C for 30 sec
12
72º C for 30 sec
95º C for 10 sec
3
63º C for 30 sec
28
72º C for 30 sec
4
72º C for 2 min
1
5
4º C forever
1
Note: To be sure of sample amplification, refer to Product Gel Electrophoresis (Appendix A).
C. Hybridization
•
•
1.
2.
3.
4.
5.
Be sure hybridization buffer components of the LIFECODES probe mix are solubilized and that the beads are thoroughly
suspended.
Turn on the Luminex Instrument and XY Platform to allow for 30 minute warm-up.
Warm probe mix in a 55º to 60ºC heat block for at least 5 -10 minutes to thoroughly solubilize components in probe mixture.
Sonicate briefly (~15 sec), then vortex probe mix for about 15 seconds to thoroughly suspend the beads.
Combine 15 µL of the appropriate probe mix with 5 µL of locus specific PCR product into each well of a thermal cycler 96 well plate
(Costar® No. 6509). . When aliquoting probe mix to more than 10 wells, gently vortex probe mix after each set of ten. Seal plate with
polyethylene tape (Costar® No. 6524).
Place silicone compression mat on top of plate prior to hybridization.
Hybridize samples under the following incubation conditions:
Table 4. Thermal Cycler Conditions For Hybridization
97ºC for 2 minutes
47ºC for 10 minutes
56ºC for 8 minutes
56ºC HOLD
•
6.
7.
Ensure that the detection laser on the Luminex Instrument is turned on at least 30 minutes before the hybridization ends.
While the samples are hybridizing, prepare a 200:1 Dilution Solution/SA-PE mixture. Combine 170µL Dilution Solution (DS) and
0.85µL 1mg/mL SA-PE per sample. It is recommended to make enough Dilution Solution Mixture for n+1 samples to account for
pipetting loss. (See Table 5).
Keep Dilution Solution/ SA-PE mixture in the dark, at room temperature; SA-PE is light sensitive! The Dilution Solution may be
warmed at 45ºC for 5 minutes and vortexed upon arrival to ensure all components are in solution. Dilution solution must be at room
temperature (18 to 30°C) before making the mixture. Prepare prior to use and discard any remaining portion.
Page 5 of 9
LC1436RUO.4 (05/15)
Table 5. Dilution Solution Preparation Volumes
# of Samples
1
5
10
20
50
Dilution Solution (DS)
170µL
850µL
1700µL
3400µL
8500µL
SA-PE
0.85µL
4.25µL
8.5µL
17µL
42.5µL
Note: DO NOT CANCEL HYBRIDIZATION PROGRAM BEFORE REMOVING THE TRAY FROM THE THERMAL CYCLER!
8. At the 56ºC hold, while the tray is on the thermal cycler, dilute each sample with 170µL of the prepared Dilution Solution/ SA-PE
mixture. It is critical to dilute all samples within 5 minutes (following the 8 minute 56°C HOLD step).
9. Remove the sample tray from the thermal cycler and place in the Luminex Instrument.
D. Analyze sample using the Luminex Instrument*
For best results, assay the samples immediately using the Luminex Instrument. Samples can be read up to 30 minutes after being diluted.
If not read immediately, protect samples from light.
1. Turn on the Luminex Instrument between 30 minutes and 4 hours before assaying the samples.
2. Prior to analyzing the samples on the Luminex Instrument, set up a Batch Run by which the samples will be analyzed.
a) Select Create a New Batch from the File menu.
•
For example, if analyzing for HLA-DPB1, add Batch for HLA-DPB1.
•
The Batch Template is provided and is named, in this case, HLA-DPB1.
•
Please note that the template versions are lot number specific and correspond to the kit lot numbers.
•
Follow the stepwise instructions that appear on the screen for creating batches.
•
When naming the batch, do not include commas in the name because information after a comma will be lost upon exportation of
the data.
3.
•
For further instructions on creating batches and multibatches, refer to the Luminex User’s Manual
b) Click the eject icon to eject the plate holder. Place the 96 well thermal cycler plate containing the samples in the XYP heater
block present on the plate holder.
c) Click the Retract icon. The samples are now ready to be analyzed. A prime step should be performed before starting the run.
d) After the samples have been run through the instrument, a sanitization step with 70% Isopropanol or 20% household bleach
should be performed followed by two wash steps. The instrument can be turned off at this point if it is not going to be used for the
remainder of the day.
After a batch is complete, the data is exported as a comma separated values (csv) file. These files are named ‘OUTPUT.CSV’ and
saved in a folder with the Batch Name. This data is then available for making typing assignments as described below.
*Refer to Luminex User’s Manual for instrument operation, including daily startup, calibration, maintenance, and shutdown procedures.
RESULTS
Sample typing can be done as follows:
The generated CSV files can be opened and the data processed with common spreadsheet programs such as Microsoft Excel, Lotus 123,
Corel Quattro Pro, or similar software. Analysis is comprised of the following steps:
1) Verify that the Number of Events for each SSO in each sample is at least 60. This information is found in the DataType: Count section
of the CSV file.
2) Determine that the values for the Consensus probes for each sample are above their minimum Median Fluorescent Intensity or MFI.
The minimum thresholds are lot specific and can be found in the Threshold Table.
Caution:
•
To obtain reliable results, there must be sufficient data gathered by the Luminex Instrument.
•
Collect at least 60 events for HLA-DQA1 (Part # 628933) and HLA-DPB1 (Part # 628937).
•
Collect at least 40 events for HLA-DQA1/B1 (Part # 628930R) and HLA-DPA1/B1 (Part # 628936R).
3)
4)
Subtract the Background Control value for each probe from the sample values producing the background corrected data set.
Background Control values are found in the Threshold Table and are lot specific. Background values are average MFI values for each
bead to compensate for background noise due to bead variation.
For each sample, divide the background-corrected data for each probe by the background-corrected value for the corresponding
consensus probe producing the normalized data set.
MFI (Probe) – MFI (Control blank for probe)
MFI (Consensus) – MFI (Control blank for consensus)
5)
6)
For each probe, record the normalized value on the Threshold Table Worksheet.
Once all values have been assigned, the probe hit pattern (i.e., the combination of all positive and negative assignments for a given
sample) can be compared with the Probe Hit Table(s) provided.
Caution:
•
There is a separate threshold table for each locus and each probe mix.
•
These threshold tables are Lot-specific; be certain that the Lot # on the threshold tables matches the Lot # in the typing kit.
Page 6 of 9
LC1436RUO.4 (05/15)
•
•
If a normalized value for a particular probe falls above the maximum threshold for a negative assignment and below the minimum value
for a positive assignment, the sample should be considered as indeterminate for this probe. The sample should be typed, first assuming
the value to be negative and then again assuming the value to be positive.
See EXPECTED VALUES section for further information on threshold values.
QUALITY CONTROL
It is recommended that one negative and positive control be run with each test, such as a water blank and a previously typed sample respectively. Consensus
SSO probes, listed on the Threshold Table, hybridize to their respective locus specific alleles. Values obtained with the Consensus SSOs from positive controls
should exceed the threshold value for the SSO as set forth in the Threshold Table Worksheet. Values obtained with the Consensus SSOs from water blanks
should be below the threshold value for the SSO as set forth in the Threshold Table Worksheet.
The LIFECODES Probe Mix(es) contain one or more consensus SSO probes identified in the typing kit worksheets. These consensus probes hybridize to all
alleles and act as internal controls to verify amplification and to confirm that hybridizations occurred. If the minimum value is not obtained for these SSOs, the
sample may not produce the correct typing and the sample test should be repeated.
The assay should be run as recommended in the package insert as well as performed with any other quality control procedures that are in accordance with local,
state, federal and/or accreditation agencies requirements.
LIMITATIONS OF THE PROCEDURE
The PCR conditions and assay conditions described require precisely controlled conditions. Deviations from these parameters may lead to product failure.
All instruments must be calibrated according to manufacturer’s recommendations and operated within manufacture’s prescribed parameters.
1)
2)
3)
4)
5)
Beads must be pre-warmed and well suspended prior to use. This ensures that the hybridization buffer components are in solution.
47ºC and 56ºC incubations require a high degree of accuracy (+/- 0.5ºC). A thermal cycler should be employed. Temperature should be verified,
within wells of the 96 well thermal cycler plate, using a thermocouple (e.g., Bio-Rad, Model VPT-0300 or equivalent). The temperature within
wells and among wells should not vary more than +/- 0.5ºC.
Time at 56ºC is critical and should not exceed a total of 13 minutes. This includes the 8-minute incubation plus no more than 5 minutes to dilute
all the samples with Dilution Solution/ SA-PE mixture.
Once diluted, the samples are stable at room temperature (18 to 30°C) for up to 2 hours (protect from light). Since a full 96-well plate can take up
to 1.5 hrs. To run through the Luminex Instrument, the analysis should be started no more than 30 minutes after dilution to ensure that the last
sample is analyzed within the 2 hr. limit.
Do not mix components from other kits and lots.
Due to the complex nature of HLA typing, qualified personnel should review data interpretation and typing assignments.
TROUBLESHOOTING
PROBLEM
Low Bead Count
POSSIBLE CAUSE
Probe Mix not well suspended
Instrument not
functioning properly
Low DNA
SOLUTION
Prewarm, sonicate and vortex probe mix and repeat
assay.
Calibrate Instrument. (Refer to Luminex IS User’s
manual.)
Remove and sonicate needle. Perform backflush.
Call Immucor Transplant Diagnostics, Inc. if problem
persists. (888) 329-0255
Check DNA concentration and purity.
Salts in Master Mix are out of
solution
Heat Master Mix at 37ºC for 5 minutes, vortex gently
and spin down briefly.
Out of Calibration
Sample flow path blocked
CON Threshold
Failure
Sample failed to amplify
or amplified poorly*
Poor Taq Polymerase
Amplification conditions not within specific parameters
Low Median Fluorescent Intensity Value (MFI)
Multiple SSO
failures or sample
fails to yield a HLA
typing result
Allele specific
amplification
Amplification conditions not
within specific parameters
Use LIFECODES Taq Polymerase Catalog # 628076.
Run Thermal profile on Thermal cycler to verify
parameters are within specified parameters.
Warm dilution solution at 45ºC for 5 minutes before
use and vortex. Store at room temperature.
Replace R-Phycoerythrin Conjugated Streptavidin.
Run Thermal profile on Thermal cycler to verify
parameters are within specified parameters.
DNA sample contaminated
Re-isolate DNA from Blood sample.
DNA partially degraded
Evaporation during hybridization step
If not using an entire plate, leave one row empty on
each side of samples to be assayed to allow plate to
be sealed tightly.
* PCR amplification can be verified by gel electrophoresis (See Appendix A).
Page 7 of 9
LC1436RUO.4 (05/15)
EXPECTED VALUES
Values typically can be resolved as positive and negative. In some rare instances, the values may be indeterminate. An “indeterminate value”
represents a range in which neither positive nor negative values have been observed. If a sample contains indeterminate values for a
particular SSO probe, the sample should be typed with the probe as a negative and again with the probe as a positive. Three cases can arise:
1. One of the choices (i.e. Positive or Negative) provides a match.
2.
3.
•
•
•
Both choices provide matches.
•
Sample can be re-assayed, or the alleles obtained from both typings can be reported.
Neither choice produces a match.
•
In this instance, there are likely to be other probes that were incorrectly assigned. This sample needs to be re-assayed and
possibly re-amplified.
If more than two probes are indeterminate, the sample should be re-assayed.
If a probe hit pattern does not produce an HLA type, the sample should be re-amplified and re-assayed. It may also be necessary to
re-isolate DNA from the sample and reamplify and reassay.
As noted in the Limitations of the Procedure section, it is critical to precisely follow the protocol. Any deviations can lead to sample
typing failure.
REFERENCES
1.
2.
Olerup, O., et al. (1992) Tissue Antigens 39:225
Saiki, RK., et al. (1986) Nature 324: 163
3.
4.
Maeda, M., et al. (1989) Tissue Antigens 34: 290
Bugawan, TL., et al. (1990) Immunogenetics 32: 231
LIMITED LICENSES
Taq polymerase is manufactured for Immucor Transplant Diagnostics by Promega Corp. It is licensed to Promega under U.S. Patent Nos.
5,338,671 and 5,587,287 and their corresponding foreign patents. The purchase of this product includes a limited, non-transferable license
under U.S. patent 5,981,180 or its foreign counterparts, owned by Luminex Corporation,
MANUFACTURER INFORMATION:
Manufacturer: Immucor Transplant Diagnostics, Inc., 550 West Avenue, Stamford, CT 06902. Phone: 203-328-9500, 888-329-0255
Fax: 203-328-9599
European Technical Service: Phone: +32/3 385 4791
This document last revised and issued: Rev 4; 15 MAY 2015
TRADEMARKS USED
AB Gene®
Costar®
Microseal™
IDNA™ Agarose
GelStar™
Luminex®
Gene Amp®
Veriti™
LIFECODES®
AB Gene House
Corning Incorporated
Bio-Rad Laboratories, Inc.
Lonza Group, Ltd.
Lonza Group, Ltd.
Page 8 of 9
Luminex Corporation
Roche Molecular System
Applied Biosystem
Immucor Inc.
LC1436RUO.4 (05/15)
APPENDIX A
Gel Electrophoresis
The PCR reactions performed in the LIFECODES HLA-SSO Typing Kits are designed to produce both double and single stranded products, which are the
predominant products that hybridize to the SSOs. For quality assurance or to trouble shoot an experiment it might be necessary to perform gel electrophoresis to
examine the PCR reaction for the presence of amplified DNA.
Materials Required (as listed or equivalent)
•
•
•
•
•
•
Electrophoresis Grade Agarose (Lonza Group, Ltd. IDNA®
Agarose No. 50170)
Electrophoresis apparatus/power supply
1X Gel Buffer (40xTAE, Promega No. V4281)
GelStar® Nucleic Acid Gel Stain (Lonza Group, Ltd. No.50535)
UV Transilluminator (ChromatoVUE, UVP Inc. Model TM36)
Photographic imaging system
The relative migration of the single stranded product is dependent upon the gel concentration and buffer system employed. Approximate migrations for each
amplification are listed below for samples run in a 2% Agarose gel in 1X TAE buffer.
Electrophoresis Conditions
Note: Not applicable for HLA-DQA1/B1 (Part # 628930R) and HLA-DPA1/B1 (Part # 628936R) as individual bands cannot be distinguished in
combination multiplex.
1.
2.
Remove GelStar® Nucleic Acid Stain (Lonza Group, Ltd. No.50535) from freezer to thaw. Keep in dark.
The gel used for this procedure must be 2%, i.e. for a 200ml gel bed use 4 grams of agarose to 200mL 1X TAE (Dilute from 40X TAE). Add 10µL GelStar®
Nucleic Acid Stain to the molten agarose. When pouring the gel be sure to leave ample room for DNA to run a significant distance (1 to 2 inches). USE
CAUTION: GelStar® is a potential Carcinogen.
NOTE: It is possible to run gels with 20µL of 10mg/mL Ethidium Bromide in place of GelStar® Nucleic Acid Stain. Product band intensity will be less in gels
containing Ethidium Bromide than in gels containing GelStar®. USE CAUTION: Ethidium Bromide is a known Carcinogen.
3. Keep gel in dark and allow to solidify.
4. Load a mixture of 2.5µL of each PCR product and 2.5µL 2X loading buffer with visible dye per sample, per amplification. Let gel run in the dark at
approximately 160 volts for 45 minutes or until sample runs far enough to see separate bands for single and double stranded product (bromophenol blue
band or other visible marker migrates 1 to 2 inches from wells).
5. Photograph using UV Transilluminator accompanied by a GelStar® Yellow Photographic Filter (Lonza Group, Ltd. No 50536).
CAUTION: Wear protective equipment when handling GelStar® Nucleic Acid Stain or Ethidium Bromide and when photographing gel using UV
Transilluminator.
6. Gel analysis
HLA-DPB
HLA-DQA
Double Strand(s) (bp)
~280
~280, ~240
Single Strand(s) (bp)
~180
~180, ~160
Gel Interpretation
Amplification
Non-amplification
Well
Double Stranded DNA
Single Stranded DNA
----(Bright)
--------(less bright)
Primer Band
Page 9 of 9
LC1436RUO.4 (05/15)
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