μCaler MRD Solution is equipped with adapters containing dual Unique Molecular Identifiers (UMI & BMI), so as to meet the analysis requirements of ultra-low frequency mutations in plasma circulating cell-free DNA for MRD detection; in addition, this solution is designed for targeted enrichment of small Panel, integrated with upgraded and optimized hybrid capture and elution processes, and equipped with μCaler Panel designed based on innovative protocols, which can complete the whole process of capture-library preparation in same day.
Analysis of Variation Consistency in Standards
Samples were derived from Pancancer Light 800 gDNA Reference Standard (Genewell, GW-OGTM800) mixed with Human Male Genomic DNA (Promega, G1471) at the ratios of 10:0 and 1:9, respectively, to artificially mimic different mutation frequencies. Theoretical mutation frequencies at different mutation sites for the Pancancer Light 800 gDNA Reference Standard are as follows:
Figure 3. Consistency between expected allele frequency and observed allele frequency in the capture data of μCaler Panel and Traditional Panel. 30 ng simulated samples were used μCaler MRD Solution (for Illumina®) coupled with μCaler Panel and NadPrep Hybrid Capture System coupled with Traditional Panel to complete hybrid capture respectively, and sequenced on Illumina Novaseq 6000 with PE150. The detection consistency of mutations (pre-library containing UMI) was analyzed by sequencing depth from DownSampling each sample data to 80,000x before removing duplication, and the analytical filtering criteria are single-strand consensus sequences (family size ≥ 3) (SSCS ≥ 3).
Customized SNP Panels to Simulate Low Frequency Mutation Limit Detection
gDNA from two healthy donors with known mutation was mixed at ratios of 99:1, 999:1, and 9999:1 to artificially mimic samples with different mutation frequencies. Category 1 contain 19 homozygous mutation with mutation frequency of 1%, 0.1% and 0.01% respectively, and category 2 contain 11 heterozygous mutation with mutation frequency of 0.5%, 0.05% and 0.005% respectively.
Figure 4. Detection of low-frequency mutations by μCaler Panel and Traditional Panel. 50 ng simulated samples were used by μCaler MRD Solution (for Illumina®) coupled with μCaler Panel (about 3 Kb target region, covering 30 allelic loci) and NadPrep Hybrid Capture System coupled with Traditional Panel (about 42 Kb target region, covering 160 allelic loci, including the above 30 loci) respectively, and sequenced on Illumina Novaseq 6000 with PE150. Each pair of samples was subjected to the same depth (pre-library containing UMI) for three downsampling, and the detection of the mutation site was analyzed by Duplex Consensus Sequences (DCS211) as well as SSCS ≥ 3. Average valid reads supporting mutations ≥ 1 are judged as positive.
Figure 5. Comparative analysis of detection and theoretical detection for low-frequency mutations by μCaler Panel and Traditional Panel.
Note:Theoretical number of mutation is 2,750x of DCS211 depth; the distribution rule of mutation detection by 10,000 random sampling for different mutation frequencies.
Lib Prep Module
/
/
Packing No.
Color of Tube Cap
Component
Volume
1002101 (24 rxn)
Volume
1002103 (96 rxn)
Box1
EndRepair & A-Tailing Buffer
180 µL
690 µL
End Repair & A-Tailing Enzyme
120 µL
460 µL
Ligation Buffer
750 µL
2×1500 µL
DNA Ligase
65 µL
250 µL
2X HiFi PCR Master Mix
720 µL
2×1600 µL
NadPrep
Amplification Primer Mix II
145 µL
650 µL
Nuclease Free Water
2.5 mL
8 mL
TE Solution
1 mL
4 mL
Box2
NadPrep SP Beads
4 mL
15 mL
Packing No. | Color of Tube Cap | Component |
Volume 1002211(24 rxn) |
Volume 1002212 (96 rxn) |
Box1 |
|
EndRepair & A-Tailing Buffer | 180 µL | 690 µL |
|
End Repair & A-Tailing Enzyme | 120 µL | 460µL | |
|
Ligation Buffer | 750 µL | 2×1500 µL | |
|
DNA Ligase | 65 µL | 250 µL | |
|
2X HiFi PCR Master Mix | 720 µL | 2×1600 µL | |
|
NadPrep M-Amplification Primer Mix (for MGI, SI) | 20 µL | 75 µL | |
|
NadPrep M-Amplification Primer Mix (for MGI, DI) | 20 µL | 75 µL | |
/ |
Nuclease Free Water | 2.5 mL | 8 mL | |
|
TE Solution | 1 mL | 4 mL | |
Box2 |
/ |
NadPrep SP Beads | 4 mL | 15 mL |
Color of Tube Cap | Component |
Volume 1103111 (24 rxn) |
Volume 1103121 (96 rxn) |
Volume 1103122 (96 rxn) |
|
NadPrep Universal UDI-Index Primer Mix # | 12×15 µL | 24×25 µL | 24×25 µL |
|
NadPrep UMI Adapter | 60 µL | 230 µL | 230 µL |
|
NadPrep Amplification Primer Mix II | 20 μL | 75 μL | 75 μL |
Color of Tube Cap | Component |
Volume 1003911 (24 rxn) |
Volume 1003921 (96 rxn) |
Volume 1003922(96 rxn) |
Volume 1003925 (96 rxn) |
Volume 1003926 (96 rxn) |
|
NadPrep M-Index (MDI) Primer Mix # | 12×15 µL | 24×25 µL | 24×25 µL | 24×25 µL | 24×25 µL |
|
NadPrep BMI-Adapter | 60 µL | 230 µL | 230 µL | 230 µL | 230 µL |
Blocker
Color of Tube Cap | Component |
Volume 1106102 (16 rxn) |
Volume 1106101 (96 rxn) |
|
μCaler NanoBlockers (for Illumina®) | 40 μL | 210 μL |
Color of Tube Cap | Component |
Volume 1106212 (16 rxn) |
Volume 1106211 (96 rxn) |
|
μCaler NanoBlockers (for MGI, DI) | 40 μL | 210 μL |
Hybrid Capture
Volume
1105202 (16 rxn)
Volume
1105201 (96 rxn)
260
μL
/
/
Packing No.
Color of Tube Cap
Component
Box 1
μHyb #1
840 μL
3×1700
μL
μHyb #2
130 μL
790
μL
Human Cot DNA
45 μL
μEnhancer
1300 μL
5×1600 μL
Box 2
Streptavidin Beads
480 μL
2.9
mL
Wash
Buffer A Pro
2×5.8
mL
3×23
mL
Wash Buffer B
2.9 mL
20
mL
Panel
Catalog | /Color of Tube Cap | Component | Volume |
1100100 |
|
μCaler Custom Panel, 24rxn | 60 μL |
Type | Product | Detail | Catalog# |
Lib Prep Module | NadPrep DNA Library Preparation Kit (for Illumina®) G24 | 24 rxn | 1002101 |
NadPrep DNA Library Preparation Kit (for Illumina®) E96 | 96 rxn | 1002103 | |
Adapter Module | NadPrep UMI Adapter Kit Set A1 (with 10 nt Index), 24 rxn | 1-12 | 1103111 |
NadPrep UMI Adapter Kit Set B1 (with 10 nt Index), 96 rxn | 1-24 | 1103121 | |
NadPrep UMI Adapter Kit Set B2 (with 10 nt Index), 96 rxn | 25-48 | 1103122 | |
NadPrep BMI Adapter (MDI) Module Set A1 (for MGI), 24 rxn | MDI 1-12 | 1003911 | |
NadPrep BMI Adapter (MDI) Module Set B1 (for MGI), 96 rxn | MDI 1-24 | 1003921 | |
NadPrep BMI Adapter (MDI) Module Set B2 (for MGI), 96 rxn | MDI 25-48 | 1003922 | |
NadPrep BMI Adapter (MDI) Module Set B3 (for MGI), 96 rxn | MDI 49-72 | 1003925 | |
NadPrep BMI Adapter (MDI) Module Set B4 (for MGI), 96 rxn | MDI 73-96 | 1003926 | |
Blocker | μCaler NanoBlockers (for Illumina®), 16 rxn | 16 rxn | 1106102 |
μCaler NanoBlockers (for Illumina®), 96 rxn | 96 rxn | 1106101 | |
μCaler NanoBlockers (for MGI, DI), 16 rxn | 16 rxn | 1106212 | |
μCaler NanoBlockers (for MGI, DI), 96 rxn | 96 rxn | 1106211 | |
Hybrid Capture | μCaler Hybrid Capture Reagents, 16 rxn | 16 rxn | 1105102 |
μCaler Hybrid Capture Reagents, 96 rxn | 96 rxn | 1105101 | |
Panel | μCaler Custom Panel, 16 rxn | 16 rxn | 1101201 |
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