GA Lx V2 Dysbiosis Test Instruction Manual

INSTRUCTIONS FOR USE (IFU)
Dysbios is Test Lx v2 – 96 Tests
2156 (2157, 2158, 2801)
Rev is ion 9

V2 Dysbiosis Test

https://qrco.de/bcP5cH

Scan the QR-code or type in the link below to watch the GA-map® Dysbiosis Test Lx v2 – Lab Instruction Video!
Standard terms and conditions for use of assay product
By opening the packaging containing this Assay Product (which contains fluorescently labeled microsphere beads authorized by Luminex Corporation) or using this Assay Product in any manner, you are consenting and agreeing to be bound by the following terms and conditions.
You are also agreeing that the following terms and conditions constitute a legally valid and binding contract that is enforceable against you. If you do not agree to all of the terms and conditions set forth below, you must promptly return this Assay Product for a full refund prior to using it in any manner.
You, the customer, acquire the right under Luminex Corporation’s patent rights, if any, to use this Assay Product or any portion of this Assay Product, including without limitation the microsphere beads contained herein, only with Luminex Corporation’s fluorescent analytical test instrumentation marketed under the name Luminex Instrument.
Full statement: https://www.luminexcorp.com/eu/end-user-terms-and- conditions/
Please note: The test is for research use only in the US – not for use in diagnostic procedures.
**** Genetic Analysis AS Ulvenveien 80 0581 Oslo, Norway

PRODUCT INFORMATION

DEFINITIONS OF SYMBOLS

on IVDs

WARNINGS AND PRECAUTIONS
Fecal samples should be treated as potentially infectious material and require the use of BSL-2 grade laboratory equipment and precautions. This involves the use of appropriate PPE, biological safety cabinet, proper waste disposal and risk-minimizing routines for sample handling.
Appropriate skin and eye protection should be worn during usage of the DNA isolation kit (mag™ maxi, LGC genomics). Do not use bleach for decontamination of liquid waste from the extraction process.
The operators must have general skills in molecular biology laboratory techniques to perform the GAmap® Dysbiosis Test Lx v2.
PRINCIPLE OF ANALYSIS
The GA-map® Dysbiosis Test Lx v2 is a diagnostic test that maps the intestinal microbiota profile for a selected set of bacteria and allows diagnosis of dysbiosis of patients in a clinical setting.
The GA-map® platform uses probes that target variable regions (V3 to V9) of the bacterial 16S rRNA gene to characterize and identify bacteria present (Casén C et al. (2015) Aliment Pharmacol Ther.). The targets are identified in a molecular multiplex assay that utilizes the Single Nucleotide Primer Extension (SNuPE) technology patented by Professor Knut Rudi (US6617138). A unique algorithm takes advantage of all the data generated by the detection of the SnuPE products to determine dysbiosis level in the sample. The algorithm is incorporated in the GA-map® Analyzer software that accompanies the test.
INTENDED USE
GA-map® Dysbiosis Test Lx v2 is intended to be used as a fecal gut microbiota DNA analysis tool to identify and characterize dysbiosis in adults.
Indications for use

• Determine if a patient is non-dysbiotic or dysbiotic (and degree of dysbiosis) according to cut-off given in the GA-map® Dysbiosis Test Lx v2.
  In patients where organic disorders have been ruled out, the test can be used for identification of dysbiosis in:

  • IBS patients
  • IBD patients
  • symptomatic non-IBD patients (patients with negative colonoscopy results)

• Establish a gut microbiota profile given bacteria levels compared to a normobiotic reference in:

  • IBS patients
  • IBD patients
  • Symptomatic non-IBD patients (patients with negative colonoscopy results)
  • patients with functional gastrointestinal disorders

• Monitor dysbiosis during treatment of IBS or non – IBD or IBD.

CONTENT OF THE REAGENT KIT
The volumes provided in the GA-map® Dysbiosis Test Lx v2 kit are sufficient for 96 reactions, including controls. The reagents are provided in two boxes; Box A and Box B.

SHELF LIFE AND STORAGE OF REAGENT KIT
The shelf life of the reagent kit is set to 18 months from date of production. The expiry date is indicated on the box label and the content should not be used after the expiry date. The kit can be reused maximum five times.

• The GA-map® PCR MasterMix and End-Labeling MasterMix are provided in two aliquots with three freeze-thaw cycles.
  ** The GA-map® Hybridization buffer and Detection buffer should be equilibrated to ambient temperature before use.

GENERAL ASSAY INFORMATION

PROCEDURE OUTLINE
The GA-map® Dysbiosis Test Lx v2 lab procedure is divided into six main steps, which are described in more detail in the Lab Procedure section. The outline and instructions must be followed carefully. SAMPLE STORAGE
The recommended storage conditions for fecal samples collected on Copan eNAT™ buffer.

Sample material| Storage temperature| Maximum storage time| Maximum freeze- thaw cycles
---|---|---|---
Fecal sample on eNAT™ buffer| RT (<40°C)*| 14 days| NA
2-8°C**| 4 weeks| NA
<-15°C| Prolonged storage| 2

• Samples on eNAT™ buffer should be kept at +4°C after reception.
  **For storage >4 weeks, the tubes should be frozen ≤-15°C.
  The sample intermediates are products of the different steps in the lab procedure. The procedure can be paused at several different steps, as indicated by the maximum storage time of the sample intermediates. The procedure description also contains several “procedure can be paused” symbols, which indicate possibility for overnight pauses.

Sample intermediate| Storage temperature| Maximum storage time| Maximum freeze- thaw cycles
---|---|---|---
gDNA undiluted and 1:50 dilution| 2-8°C| 3 weeks| NA
<-15°C| Prolonged storage| 9
16S rRNA PCR product| 2-8°C| 48 hours| NA
16S rRNA PCR product, ExoI/rSAP-treated| 2-8°C| 7 days| NA
End-Labeling product| 2-8°C| 2.5 hours| NA
<-15°C| 2 weeks| 1
Hybridization product| RT, protected from light| 24 hours (Luminex® 200™)| NA
4 hours (MAGPIX®)| NA

ASSAY QUALITY CONTROL SCHEME
An overview of the different controls included in the assay (both required and optional) is given in the table below.

bacterial 16S rRNA gene
GA-map® Kit ctrl neg| QCC33| Included in kit| Step 2 – Amplification of the bacterial 16S rRNA gene
PCR control negative| QCC05| The water used to dilute gDNA| Step 2 – Amplification of the bacterial 16S rRNA gene
GA-map® End-Labeling ctrl neg| QCC29| Included in kit| Step 5 – End-Labeling of probe set
GA-map® End-Labeling ctrl pos| QCC30| Included in kit| Step 5 – End-Labeling of probe set
GA-map® Hybridization ctrl| HYC01| Included in kit| Step 6 – Hybridization and signal detection

PLATE SETUP
The figures below illustrate the recommended arrangement of assay controls in the 96-well plates. The patient samples can be placed in any other well on the plate. All steps should be performed by working in columns, from column 1 to column 12, and an 8-channel pipette should be used whenever applicable. The naming of assay controls is especially important during step 6 of the assay, as the resultgenerating software requires these controls to perform data QC.

GENERAL PROCEDURE NOTES

• Before start, it is recommended that the user confirms that required equipment, materials and reagents are available for each step of the procedure.
• A plate setup with controls and samples should be prepared for each step of the procedure and reagent volumes should be calculated according to the sample number.
• Appendix 4 – GA-map® Dysbiosis Test Lx v2 Run log (available upon request) can be used for plate setup and volume calculation.
• Components from different lots of the GA-map® Dysbiosis Test Lx v2 kit should not be mixed.
• Reagents from Box A, except for enzymes, should be thawed on ice/cooling block before use and kept on ice/cooling block during handling.
• All enzymes should be kept on a freezing block during handling. Due to high viscosity, theenzymes should be briefly spun down (not vortexed) before use, then slowly aspirated withoutpipetting up and down.
• The buffers from Box B should be kept at ambient temperature (15 to 25°C).
• Before use, all reagent tubes except enzymes should be vortexed at 2800 rpm for 3 seconds and briefly spun down.
• For all centrifugation steps (tubes and plates), unless otherwise specified, use a brief spin down up to 100 x g.
• In steps 2-5, the 96-well plates and reagents should be kept on ice/cooling block.
• In step 6, the 96-well plate and reagents except for the GA-map® Hybridization ctrl (HYC01) should be kept at ambient temperatures.

MATERIALS REQUIRED BUT NOT PROVIDED
Refer to Appendix 6 Installation Guide for a detailed list of required equipment,  materials, and reagents. The lab should be equipped as recommended in the Installation Guide.

EXTRACTION VALIDATION

VALIDATION OF NEW INSTRUMENTS AND REAGENT KITS FOR EXTRACTION
In order to validate a new extraction procedure, a selection of samples with varying DI-scores must be extracted at both sites and analyzed together. Contact your local distributor or Genetic Analysis to order an extraction validation package.

SAMPLE COLLECTION

SAMPLING PROCEDURE
The recommended sampling procedure with Copan eNAT™ tubes is described below. “Dry” samples (without buffer) can also be used. Contact Genetic Analysis for information on this. Other types of transport buffers/reagents may lead to a bias in the results  nd are not validated for use with the GAmap® Dysbiosis Test Lx v2.
For validation of sampling methods, please contact Genetic Analysis for more information.
Materials:

• eNAT™ tube w/ regular FLOQSwab from Copan, cat no: 608CS01R (1ml) or 606CS01R (2ml)
• Fecal sampling container, e.g. sampling tray or Med Auxil sampling paper (sterile/clean).

Procedure:

1. Sampling can be performed at any convenient place, at any time of the day.

2. Sampling shall be done from one single bowel movement.

3. Collect the fecal sample in a collecting unit. Do not mix urine with the fecal sample, and never collect the sample directly from the toilet.

4. Open the package containing sample tube and swab and remove the swab stick holding above the red line to avoid contamination.

5. Dip the swab into the sample and roll until the swab is saturated with a thin layer of material.
   Do not over-saturate the swab! Only a small amount of sample material is needed for analysis.

6. Place the swab inside the sample tube and break off the top part of the stick (above the red line). Securely close the tube by tightening the cap and shake until the sample appears homogenous.

7. Mark the tube with name/ID and sampling date.

8. Secure the sample by placing the tube into a secondary container (tube or bag with absorbing unit).

9. Place the secured sample in the addressed envelope/bag/box and ship the sample as directed.

SAMPLE RECEIPT AT SITE OF ANALYSIS
Upon receipt of fecal samples, the shipment should be checked for leakage from the tubes or damage, and visually assessed for presence of mucus and blood.
Samples collected on eNAT™ buffer should be stored at 2-8°C or at ambient temperatures (<40°C) until analysis. If the time from sampling to analysis exceeds the recommended time frames (see the Sample Storage section), the sample tube should be frozen at ≤-15°C upon receipt.

LABORATORY PROCEDURE

STEP 1 – GENOMIC DNA EXTRACTION
Equipment, materials, and reagents for extraction with mag™ maxi DNA purification kit (LGC genomics) No reagents from the GA-map® Dysbiosis Test Lx v2 kit are required for this step. Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.
Disposable materials required:

• Lysing Matrix-E tubes
• Tube for Lysis mix
• Plastic for the DNA extraction robot
• Adhesive PCR plate seal
• Microtiter sealing tape
• Microtiter plate w/ seal for gDNA dilution
• Reagent reservoir

Reagents required:

• Extraction control negative (Lysis Buffer BLM from DNA extraction reagent kit)
• DNA extraction reagent kit, including ethanol and acetone
• Water for dilution of gDNA

Preparing the sample and reagents for gDNA extraction
Note: Protease from LGC DNA isolation kit must be prepared in accordance with LGC DNA isolation kit instruction before use. Thaw on ice before use. The BLM2 buffer must be prepared by adding acetone in accordance with LGC DNA isolation kit instruction before use.

1. If frozen, samples on Copan eNAT™ tubes should be thawed for ≥15 minutes.
2. Vortex the sample tubes to make feces homogeneous.
3. If using 1ml Copan eNAT™ tubes: Add 200µl Elution buffer to the Lysing Matrix-E tubes and then transfer 400µl sample from the Copan tubes to the Lysing Matrix-E tubes, using a pipette with wide orifice tips. Use the decapper for opening and closing of the Matrix-E tube screw caps.
   OR:
   If using 2ml Copan eNAT™ tubes: Transfer 600µl sample from the Copan tubes to the Lysing Matrix-E tubes, using a pipette with wide orifice tips. Use the decapper for opening and closing of the Matrix-E tube screw caps.

Performing gDNA extraction

1. Process the Lysing Matrix-E tubes with samples twice in the bead beater at 1800 rpm for 40 seconds with a 40 second pause between runs. Ensure that the racks are balanced.

2. Centrifuge samples at 1300 x g for 5 minutes in the plate centrifuge for Lysing Matrix-E tubes.

3. Prepare Lysis mix according to table below. Mix by pipetting.
   Note: The negative extraction control is included from the lysis step. Remember to prepare Lysis protease mix also for this control. Component in Lysing mix| µl per well
   ---|---
   Lysis buffer BLM (LGC Genomics)| 250
   Protease (LGC Genomics)| 20
   Total volume| 270

4. Transfer 270µl Lysis mix to all wells of a deep well plate according to plate setup.

5. Transfer 250µl sample supernatant from the centrifuged samples to the wells with Lysis mix, using a pipette with wide orifice tips. Use the decapper for opening and closing of the MatrixE tube screw caps.
   Remember to add 250µl Lysis buffer BLM as negative extraction control.
   Mix well by pipetting.

6. Cover the plate with adhesive PCR plate seal. Make sure the plate is thoroughly sealed.

7. Carefully place the deep well plate to float in the water bath and incubate at 65°C for 15 minutes.

8. During the incubation, finalize preparation of buffer plates according to the table below and the plate setup. Seal the plates with microtiter sealing tape until use.
   Plate Type| Plate #| Content| Volume
   ---|---|---|---
   Deep well plate| 1| MagMAX particles (vortex thoroughly before  Ethanol| 20µl
   200µl
   2| Washing buffer BLM 1| 720µl
   3| Washing buffer BLM 2| 720µl
   4| Washing buffer BLM 2| 720µl
   Elution plate| 5| Elution buffer BLM| 200µl
   Elution plate| 6| Tip comb placed in KF microplate| N/A

9. Remove the deep well plate from the water bath. If any drop of buffer is visible under the plate seal after incubation, pulse spin before removing the film.

10. Add 400µl treated sample to plate#1 according to plate setup, using a pipette with wide orifice tips. Mix well by pipetting.

11. Turn on the DNA extraction robot, find the GA-map® program1 and press Start. The robot will request plate#6 first, then plate#5 and so on. Unseal the plates before placing them in the machine. The procedure will take approximately 40 minutes.

12. When completed, remove plate#5 (elution plate). Seal the plate with microtiter sealing tape and centrifuge the plate for 1 minute at 1000 x g. Place the plate on ice/cooling block.

13. Discard plates #1, #2, #3, #4, and #6.

14. From plate#5, transfer 100µl of the eluted gDNA (avoid transferring the brown debris in the bottom) into a 96-well microtiter plate.

15. Dilute the gDNA 1:50 by mixing 5µl gDNA and 245µl nuclease free water. Mix well.

If pausing at this step, the gDNA can be stored at 2-8℃ for up to 3 weeks (or alternatively at ≤-20℃ for long term storage).

STEP 2 – AMPLIFICATION OF THE BACTERIAL 16S RRNA GENE
Equipment, materials, and reagents
GA-map® Dysbiosis Test Lx v2 kit reagents required for this step are listed in the table below.

use, keep on ice during handling.
GA-map® Kit ctrl pos (QCC23)
GA-map® Kit ctrl neg (QCC33)
GA-map® PCR polymerase| GA-map® Dysbiosis Test Lx v2, Box A| Keep on a freezing block during handling.

Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.

Disposable materials and reagents required:

• Microcentrifuge tube for PCR mix
• Microtiter plate for PCR with suitable lids or seal
• Microtiter sealing tape
• PCR control negative (same water as used for gDNA dilution in Step 1)

Performing the amplification of bacterial 16S rRNA gene

1. Keep thawed reagents and the diluted gDNA on ice/cooling block.

2. Prepare the PCR mix according to the table below. Mix by vortexing and briefly spin down.
   Component in PCR mix| µl per well
   ---|---
   GA-map® PCR MasterMix| 19.25
   GA-map® PCR polymerase| 0.75
   Total volume| 20.0

3. Dispense 20µl of the PCR mix into the microtiter plate according to plate setup. Cover plate with microtiter sealing tape if relocating to a different room. Keep on ice/cooling block.

4. Add samples and controls to the PCR plate according to plate setup:
   – 5µl of the 1:50 diluted gDNA (samples and extraction control)
   – 5µl of the kit controls and PCR control negative

5. Mix well by pipetting.

6. Seal the plate.

7. The plate can be vortexed to ensure proper mixing.

8. Briefly pulse spin the plate up to 100 x g.

9. Initiate the PCR-program and load the plate on the thermal cycler.

If pausing at this step, the PCR-product can be stored at 2-8°C for up to 48 hours.
STEP 3 – QUANTIFICATION OF PCR PRODUCT
The quality of the PCR product must be assessed to ensure optimal performance in further downstream processes. This quality control step is important for the functionality of the GA-map® Dysbiosis Test Lx v2. The following method for dsDNA quantification is recommended. Other systems must be validated for use with the GA-map® Dysbiosis Test Lx v2.
Equipment, materials, and reagents
Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.
Disposable materials and reagents required:

• Reagent reservoir
• Tubes/plates for DNA quantification
• Assay kit for DNA quantification

Performing the quantification of PCR product

1. Vortex and briefly spin down the 96-well plate containing 16S rRNA PCR product.

2. Keep PCR product on ice/cooling block.

3. erform the quantification of PCR product according to applicable assay User Guide.
   a. Use 10µl of each standard
   b. Use 2µl of the PCR product for each sample

4. Perform QC according to the requirements described below.

QC requirements
The PCR yield should be within the concentration limits presented below. The PCR yield should be within the concentration limits presented below.

See Troubleshooting section if PCR product is confirmed to be outside the lower or upper limits.

STEP 4 – CLEAN-UP OF PCR PRODUCT
Equipment, materials, and reagents
GA-map® Dysbiosis Test Lx v2 kit reagents required for this step are listed in the table below.

GA-map® ExoI

Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.

Disposable materials and reagents required:

• Microcentrifuge tube for Exo I/rSAP mix
• Reagent reservoir

Performing clean-up of PCR product

1. Vortex and briefly spin down the 96-well plate containing 16S rRNA PCR product.

2. Keep reagents and the PCR product on ice/cooling block.
   Component in ExoI/rSAP mix| µl per µl PCR product| Example: µl per well when using 23µl PCR product
   ---|---|---
   GA-map® rSAP| 0.2| 4.6
   GA-map® ExoI| 0.2| 4.6
   Total volume| 0.4| 9.2

3. Prepare Exol/rSAP mix according to the table below. Mix by pipetting and briefly spin down.

4. Transfer the Exol/rSAP mix to a reagent reservoir.

5. Add the appropriate volume to the PCR products, mix well by pipetting. The extraction and PCR controls are not required for the downstream steps, and do not need Exol/rSAP mix.

6. Seal the plate.
   Note: Due to the viscosity of the ExoI and rSAP enzymes, additional mixing of the plate using a vortexer is recommended. Insufficient mixing may lead to a bias in the results.

7. Briefly pulse spin the plate to 100 x g.

8. Initiate the clean-up program and load the plate on the thermal cycler.

If pausing at this step, the ExoI/rSAP-treated PCR product can be stored at 2-8°C for up to 7 days.
STEP 5 – END-LABELING OF PROBE SET
Equipment, materials, and reagents
GA-map® Dysbiosis Test Lx v2 kit reagents required for this step are listed in the table below.

ice before use, keep on ice during handling
GA-map® Biotin
GA-map® End-Labeling ctrl pos (QCC30)
GA-map® End-Labeling ctrl neg (QCC29)
GA-map® End-Labeling polymerase| GA-map® Dysbiosis Test Lx v2, Box A| Keep on a freezing block during handling

Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.
Disposable materials and reagents required:

• Microcentrifuge tube for End-labeling mix
• New microtiter plate for End-labeling with suitable lids or seal
• Microtiter sealing tape

Performing End-Labeling of probe set

1. Vortex and briefly spin down the 96-well plate containing ExoI/rSAP-treated PCR product.

2. Keep thawed reagents and the ExoI/rSAP-treated PCR product on ice/cooling block.

3. Prepare End-Labeling mix according to the table below. Mix by vortexing and briefly spin down.

4. Dispense 20µl of the End-Labeling mix into a microtiter plate according to plate setup. Cover plate with microtiter sealing tape if relocating to a different room. Keep on ice/cooling block.

5. Add samples and controls to the End-Labeling plate according to plate setup:
   – 5µl of the ExoI/rSAP-treated PCR samples and kit controls
   – 5µl of the End-Labeling controls

6. Mix well by pipetting.

7. Seal the plate.

8. Briefly pulse spin the plate to 100 x g.

9. Initiate the End-Labeling program and load the plate on the thermal cycler.

10. While the samples are in the thermal cycler, proceed to preparation for Step 6 – Hybridization and Signal detection.

11. Directly after completion of the End-Labeling program, transfer the PCR plate from the cycler to a freezing block.

NOTE: The End-Labeling product is labile. To prevent unspecific signals, keep the End-Labeling product on a freezing block during handling and storage. Ensure that the time between EndLabeling (this step) and Hybridization (next step) is less than2.5 hours.
Alternatively, if stopping at this step, the End-labeling product can be stored at -20°C for up to two weeks.

STEP 6 – HYBRIDIZATION AND SIGNAL DETECTION
Equipment, materials, and reagents
GA-map® Dysbiosis Test Lx v2 kit reagents required for this step are listed in the table below.

ice before use, keep on ice during handling
GA-map® Biotin
GA-map® End-Labeling ctrl pos (QCC30)
GA-map® End-Labeling ctrl neg (QCC29)
GA-map® End-Labeling polymerase| GA-map® Dysbiosis Test Lx v2, Box A| Keep on a freezing block during handling

Refer to Appendix 6 Installation Guide for specifications for equipment, materials, and reagents required in this step, in addition to workstation setup. Disposable materials and reagents required are also listed below.
Disposable materials and reagents required:

• Microcentrifuge tubes for Hybridization bead mix and Reporter mix
• Hybridization plate
• Two sealing films for Hybridization plate
• Reagent reservoir

Performing Hybridization and SAPE-labeling
NOTE! All reagents required for this step (except for the GA-map® Hybridization ctrl) are to be kept at ambient temperature. The hybridization plate should also be kept at ambient temperature during preparation and during the buffer exchange steps. Lower temperatures may lead to a drop in signal intensities.

1. Make sure the Luminex detection instrument is calibrated and ready for use.

2. Vortex and briefly spin down the 96-well plate containing End-Labeling product. Keep on ice block.

3. Prepare the Hybridization bead mix according to the table below.
   Note! The GA-map® Bead set must be resuspended by vortexing for ≥10 seconds. Component in Hybridization bead mix| µl per well
   ---|---
   GA-map® Hybridization Buffer| 32.2
   GA-map® Hybridization ctrl (HYC01)| 7
   GA-map® Bead set| 0.8
   Total volume| 40

4. Resuspend the prepared Hybridization bead mix by vortexing for 10 seconds.

5. Dispense 40µl of the Hybridization bead mix in Hybridization plate accordng to plate setup. Vortex the Hybridization bead mix thoroughly between each 24 wells.

6. Transfer 10µl of the End-Labeling product to the Hybridization plate according to plate setup.
   Mix well by pipetting.
   Note: Due to the different salt concentrations of the reaction components, additional mixing is recommended. Mix by pipetting up and down minimum 6 times upon distribution of the EndLabeling product.
   Insufficient mixing may lead to a bias in the results.

7. Cover the plate with a sealing film for Hybridization plate.

8. Initiate the Hybridization program and load the plate into the thermal cycler. Set a timer to 18 minutes. *Program the instrument for ∞ time at SAPE incubation stage.

9. Prepare the Reporter mix according to the table below.
   Component in Reporter mix| µl per well
   ---|---
   GA-map® Hybridization Buffer| 23.8
   GA-map® SAPE| 1.2
   Total volume| 25

10. After completion of the 18 minutes (Denaturation and Hybridization stages of the thermal cycler program), keep the plate at 45°C in the thermal cycler and add 25 µl of the Reporter mix to each well. Mix gently by pipetting.

11. Cover the plate with a new sealing film for Hybridization plate, close the lid and leave the program running for an additional 30 minutes (SAPE incubation stage of the thermal cycler program). Use a timer.

Preparation for signal detection

1. While the plate is incubating, prepare for scan on the Luminex detection instrument:
   a. In xPONENT, create a new batch from the correct protocol, depending on the type of Luminex instrument: Luminex® 200 TM : “GA-map Dysb. Test Lx v2” version 1.0 (Appendix 3, available upon request)
   MAGPIX®: “GA-map Dysb. Test Lx v2_MP” version 1.0 (Appendix 5, available upon request)
   b. Include the lot number of the GA-map® Dysbiosis Test Lx v2 reagent kit in the batch name. This is required if assistance or troubleshooting by GA Support is needed.
   c. Import sample and control IDs to the respective wells and optional additional information.
   d. Note that some wells in the first and last column are reserved for controls: ensure the names of the control IDs are correct.
   e. Make sure the sample and control IDs correspond to the correct positions on the plate.
   Note! The buffer exchange is a time sensitive step. Limit the time the wells are left without buffer to ≤3 minutes. Beads drying out may lead to signal loss!

2. When the 30 minutes SAPE incubation stage has completed, take the plate out of the thermal cycler and place it on a ring magnet plate for 60 seconds.

3. After the beads have collected on the side of the wells, carefully remove all the hybridization/ reporter solution.

4. Remove the plate from the ring magnet plate and add 75µl of GA-map® Detection Buffer to each well. Mix by pipetting until all beads are resuspended (approximately 10 times).
   Note! Insufficient resuspension after buffer exchange may lead to low bead count errors.
   Perform a visual check of the plate to ensure the beads are properly resuspended. In case of a visible band of beads across the wells, repeat the resuspension process in step 4 above.
   Prior to scan, the Hybridization-product can be stored at ambient temperature in the dark (resuspend the beads by pipetting up and down a few times before continuing the process):
   Luminex® 200TM: plate can be stored for up to 24 hours prior to scan
   MAGPIX®: plate can be stored for up to 4 hours prior to scan

5. Move the plate to the Luminex detection instrument.

6. Click the Run button to start analysis and confirm by pressing OK.

7. When the run is complete, export the results in a .csv format:
   a. From the Results > Saved Batches tab, select the batch and click Exp Results.
   b. Save file in the comma separated values (.csv) format. The file can be processed in the GA-map® Analyzer software for quality check and patient result generation. Do not open the file in Excel before analysis, as this may corrupt the file!

8. Remove the plate and discard it according to local regulations.

RESULT GENERATION AND INTERPRETATION

GA-MAP® ANALYZER
The GA-map® Analyzer, part no. 2801, allows quality check and patient sample result generation from data generated with the GA-map® Dysbiosis Test Lx v2 assay on a Luminex signal detection instrument.
Refer to the GA-map® Analyzer Software Manual for use of the software.
DATA QC AND RESULT GENERATION
The GA-map® Analyzer software performs the following tasks:

1. Plate QC check: The GA-map® Analyzer software checks that all the required quality controls are present in the uploaded csv file and that the plate QC parameters are met.
   It is therefore important to use the controls and names specified in the Plate setup section. If the plate QC check does not pass, the plate, including all samples, is invalid.

2. Sample QC check: If the plate is found valid, the individual samples are evaluated. Samples that do not meet the raw data signaling level QC parameters will be flagged as invalid.

3. Data normalization and result generation for each sample:
   a. DI score
   b. Bacteria Abundance Scores
   c. Bacteria profiles

4. Report generation: Patient reports in the form of an xml-file can be generated.

Please refer to the GA-map® Analyzer Software Manual for detailed instructions on how to use the software and generate reports.
INTERPRETATION OF RESULTS
A report template in a suitable format is required for presentation of the data in the xml-file. The xmlfile contains information which in a readable report can be presented in the following three levels:
Dysbiosis Index scale: To determine the degree of dysbiosis compared to a normal healthy reference population, the test result is given as a Dysbiosis Index score (DI) consisting of five levels ranging from 1 to 5, where 1 and 2 are non- dysbiotic and 3 to 5 are dysbiotic. DI score 3 is considered mildly dysbiotic, while scores 4 to 5 are severely dysbiotic. The DI scale is CE- marked.
Bacteria Profiles: Five different functional profiles, as well as bacteria diversity, are reported, each representing a set of unique bacteria signatures. The profiles are reported as either Balance or Imbalance followed by a comment. The bacteria diversity is reported as either Low or Expected.
Bacteria Abundance Table: The Bacteria Abundance Score of 48 preselected bacteria markers relative to the value of a normal healthy reference population. The relative abundance of each bacteria marker can be normal, reduced, or elevated.

PERFORMANCE CHARACTERISTICS

ANALYTICAL PERFORMANCE CHARACTERISTICS
Precision: Precision analysis for GA-map® Dysbiosis Test Lx v2 show acceptable levels of repeatability and reproducibility. All samples had a standard deviation ≤0.2 for DI score.
DIAGNOSTIC PERFORMANCE CHARACTERISTICS
An independent validation study has been performed to investigate the classification performance of GA-map® Dysbiosis Test Lx v2. The validation study comprised a total of 213 IBD and non-IBD samples from fecal sample recruitment hospitals in Norway, Sweden and Denmark. A separate clinical validation on a healthy normal cohort collected in Germany was performed using 54 fecal samples. All samples were from unique feces donors not included in previous development of GA-map® Dysbiosis Test Lx v2.
The performance characteristics (distribution of normobiotic and dysbiotic per patient category) are shown below.

| IBD| non-IBD| Healthy normal
---|---|---|---
No of samples DI>2| 87| 65| 9
No of samples DI<2| 33| 28| 45
Total no of samples| 120| 93| 54
% DI>2| 73| 70| 17
% DI<2| 28| 30| 83

LIMITATIONS

• GA-map® Dysbiosis Test Lx v2 has not been documented for use to discriminate between IBS, IBD, and other types of gastro-intestinal disorders.
• GA-map® Dysbiosis Test Lx v2 is intended for use with patients at the age between 18 and 70 years.
• Repeated freeze-thaw cycles of the fecal sample may change microbiota composition.
• The analysis method, including the sample collection and extraction method, must be performed as described to generate valid GA-map® Dysbiosis Test Lx v2 results. Alternative methods require validation.

TROUBLESHOOTING

TOO HIGH/LOW DNA CONCENTRATION FOR PATIENT SAMPLE
If the PCR quantification results for a single patient sample is outside the accepted range, the sample in question must be re-analyzed, either from PCR through preparing a new dilution or performing a new extraction. In case of repeated failure for the same sample upon re-extraction, the patient must be asked to donate a new sample.
TOO HIGH/LOW DNA CONCENTRATION FOR CONTROL SAMPLE
If the PCR quantification results for GA-map® Kit ctrl pos (QCC23), the GA- map® Kit ctrl neg (QCC33) and/or the PCR control negative (QCC05) are outside the accepted range, the PCR setup should be repeated from the amplification step. A failed kit control suggests a failure in the amplification itself (e.g. PCR master mix or temperature cycling), not with the extracted gDNA samples.
If the PCR quantification results for extraction control (QCC02) is outside the accepted range, the analysis should be repeated from genomic gDNA extraction.
DROPLETS OBSERVED ON PLATE AFTER SCAN
If observed splash between wells during the plate scan, a re-run from step 5 End-labeling or step 6 Hybridization if the End-labeling product is still valid is recommended to exclude possibility for sample contamination. If the splash between wells during the scan persists, perform following actions:

1. Perform Enhanced Startup Routine and follow the instructions in the xPONENT software.
2. Rinse the sample probe according to the weekly maintenance routine “Clean the sample probe” in the Luminex instrument user manual.
3. Change the sample probe if the probe rinse does not stop the spillage issue.
4. Cover the plate with a Pierceable foil for Hybridization plate to prevent spillage during plate scan if step 1 and 2 does not help and the splashing persists during plate scan. Contact GA support for recommendations of foil.

QC ERRORS IN THE GA-MAP® ANALYZER SOFTWARE
Any of the following error messages might occur when analyzing the data in the GA-map® Analyzer.

Error message| Interpretation| Possible causes| Suggested action
---|---|---|---
Kit control #1 / Kit control #2 /
End-labeling ctrl positive
not found on plate| QCC23/ QCC33/ QCC30 controls are not detected on the plate.| Incorrect naming of the Control IDs in the .csv file; see assay quality control scheme and plate setup for correct naming.
Controls are omitted from analysis or sample list; see assay quality control scheme and plate setup for  correctcontrol scheme.| Open the .csv file as a .txt file and manually correct the naming
OR
Locate the run under “Saved Batches” in the xPONENT software and select “Replay batch” using correct naming.
If one or more controls were not included in the analysis, repeat the analysis with the correct controls.
Kit control #1
and/or
Kit control #2
profile error| QCC23 and/or QCC33 controls have a DI score outside the accepted range.| Error in the 16S PCR or subsequent steps of the analysis.| Repeat the procedure from Step 2 (Amplification of the bacterial 16S rRNA gene) for all samples and controls.
End-labeling ctrl positive total signal above/below the limit| QCC30 total signal too high/low.| Error in the End-Labeling or subsequent steps of the analysis.| Repeat the procedure from Step 5 (End-Labeling of Probe set) for all samples and controls.
End-labeling ctrl negative total signal above the limit| QCC29, background signals are too high.| Error in the End-Labeling or subsequent steps of the analysis.| Repeat the procedure from Step 5 (End-Labeling of Probe set) for all samples and controls.
Hybridization error for […]| HYC01 has too high/low signal in the affected sample(s).| Error in the Hybridization step or subsequent steps of the analysis.| Repeat the procedure from Step 5 (End-Labeling of Probe set) or Step 6 (Hybridization and signal detection) for the affected samples and all controls.
Universal target error for […]| UNI05 has too low signal in the affected sample(s).| Error in the Step 2 (Amplification of the bacterial 16S rRNA gene) or subsequent steps of the analysis.| Repeat the procedure from Step 2 (Amplification of the bacterial 16S rRNA gene) for affected samples and all controls.
Low bead count for […]| One or more of the probes for given sample have bead count below the lower limit.| Too little of the GA-map® Bead set added during preparation of the Hybridization plate.
Loss of beads or incomplete resuspension of beads during the buffer exchanging step.| Repeat the procedure from Step 5 (End-Labeling of Probe set) or Step 6 (Hybridization and signal detection) for the affected samples and all controls.

APPENDICES

Appendix 1: GAmap_v1.kf2 (For MagMAX™Express-96 instrument)
Appendix 2: GAmap_v2.bdz (For KingFisher Flex instrument)
Appendix 3: GA-map Dysb.Test Lx v2[1.0].lxt2
Appendix 4: GA-map Dysbiosis Test Lx v2 Run log.xlsm
Appendix 5: GA-map Dysb.Test Lx v2_MP[1.0].lxt2
Appendix 6: GA-map® Dysbiosis Test Lx v2 Installation Guide.pdf
All appendices are available upon request from support@genetic- analysis.com
Registered names, trademarks, etc. used in this document, even when not specifically marked as such, are not to be considered unprotected by law. All trademarks and registered trademarks mentioned herein are the property of their respective owners.

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www.genetic-analysis.com
Phone: +47 48 32 16 10
E-mail: support@genetic-analysis.com
© 2021-2023 Genetic Analysis, all rights reserved.

Documents / Resources

| GA Lx V2 Dysbiosis Test [pdf] Instruction Manual
Lx V2 Dysbiosis Test, Lx V2, Dysbiosis Test, Test
---|---

References

• Home - Genetic Analysis
• Resources | GA-map® Dysbiosis Test
• Video Page
• Diasorin | Molecular Diagnostics and Immunodiagnostic Specialist

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