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Hb electrophoresis by CE
Samples processed on CE and HPLC
Heterozygous A/C
Hb A2
Hb A Hb C
N
Anh. Car.
A
C+A2
Alc.
N
A0
A1A1
C
A0
Ac.
Heterozygous A/D-PunjabAFSC control overlaying
Hb A Hb D
Hb A2
Anh. Car.
A
A2
Alc.
N
D
A0
A1
Ac.
N
D1+A1
D0+A0
Heterozygous A/E
Hb A
Hb A2
Hb E
Anh. Car.
A
E+A2
Alc.
N
A0
A1A1+E1
Ac.
N
A0+E
Heterozygous S/C
S
N
C
Alc.
Anh. Car.
N
Ac.
A0
A1F(traces)
SC
AFSC control overlaying
Hb CHb S
Hb F
Hb A2
Beta thalassemia
Hb A
Hb A2
Anarh. C.
A0+A2A1
Alk. Ac.
N N
A2
A
Alpha thalassemia with Hb H
Hb A
Hb A2Hb H
Hb Bart’s (Baby’s blood)
Hb A
Hb F
Hb Bart’s
Alk.
N
A
Anh. Car.
H
A2
Alk Ac
Hb Bart’s
Hb Bart’sHb F
Hb F
Alpha Globin mutation
300 points with 15 zones Curve
Hemoglobin Analysis by Capillary2 Electrophoresis (Sebia)
Thalassemia Research Center
Institute of Science and Technology for Research and Development
Mahidol University
Nakhonpathom, Thailand.
Wantana C. Artittaya I. Thongperm M.
Oct 31’ 2006
Hb type Cases
Normal 45
Beta-thal heterozygote 39
Hb E- heterozygote 45
Hb E- heterozygote/ Alpha thal-1 heterozygote ๒๘
Hb E- heterozygote/ Hb H disease (EA Bart’s disease) ๑๔
Beta-thal/HbE disease ๓๕
Hb H disease 25
Hb H-CS disease ๙
Hb CS homozygote 8
Hb CS heterozygote 6
Alpha thal-1 heterozygote 36
Alpha thal-2 heterozygote 30
Total Samples Analyses
Hb CS : Hb Constant Spring (wait for DNA Analysis 20 cases)
Normal Subject
Alpha thal 1 heterozygote
Alpha Thal2 heterozygote
Beta thal heterozygote
Hb E heterozygote
Hb E heterozygote/ alpha thal1 heterozygote (‐‐SEA type)
Homozygous Hb E
Beta thal/E Disease
Hb H –CS Disease
CSEA Bart’s Disease
Hb Constant Spring heterozygote
Hb Constant Spring homozygote
Normal E trait Homo E b-trait Beta/E
Genotype
2.0
4.0
6.0
8.0
% Hb
A2_
Sebia
HbA2 levels in cases with beta‐thalassemia disorders
Normal, Beta‐Trait, Alpha1‐Trait, Alpha2‐Trait
E‐Trait
Levels of HbA in normal and all heterozygotes
Normal, Beta‐Trait, Alpha1‐Trait, Alpha2‐Trait
Hb E ‐Trait
HbF levels in normal and thalassemia‐trait
Levels of HbF in all thalassemic diseases
Hb H‐Disease, Hb H‐CS Disease
Homo E
Beta/E‐Disease
HbA2 and HbE in normal and thalassemia‐trait
E‐Trait
Beta‐Trait
Normal, Alpha1‐Trait, Alpha2‐Trait
HbA2 and Hb E in all disease cases
Homo E
Beta/E‐Disease
Hb H Disease, Hb H‐CS Disease
Cord Blood
CAPILLARYS / HPLC
COMPARISON
PATTERN
CAPILLARYS HPLC
Clarity of the pattern +++ -
Normal sample
HPLC CAPILLARYS
GLYCATED FORMS
CAPILLARYS HPLC
Glycated formsThey are included with
the correspondingHemoglobin
All glycated fractions are separated
Interferences of glycated forms
No interferences for the quantification
Interference of glycated HbS on HbA2
value
Peak quantification
More accurate.All subfractions are included in the main
peak
All main peaks do not include the glycated
forms. (Normally all subfractions have to be included
in each corresponding main peak).
VALUES
CAPILLARYS HPLC
HbF value on normal samples
< 0.5 %
Higher than CAPILLARYS value due to glycated form
of HbA
HbA2 on normal samples = =
HbE Separated from HbA2Not separated from
HbA2.
Heterozygous HbE + heterozygous Constant Spring
HPLC CAPILLARYS
VARIANTS, Hb BART’s & HbH
CAPILLARYS(more than 50 variants
identified)
HPLC(about 45 variants
identified)
Main variants All detected. All detected
Rare variantsPossible
superimposition withthe main peaks
Possible superimposition with
the main peaks
Constant Spring Well detected Sometimes difficult to detect
Hb Bart’sand HbH
Detected and quantified
Detected but not quantified due to overevaluation by
glycated form of HbA
Hb H –CS Disease
CHARACTERISTICS
CAPILLARYS HPLC
Throughput 34 samples / hour 10 samples / hour
Primary tubeYes,
after sedimentationand plasma removal.
Not possible to test whole blood
Yes,on whole blood
Plasma Protein interferences
No, analysis on red blood cells only
Possible interferences, eg
Bilirubin at the level of Hb Bart’s
Reproducibility Very Good Very Good
Cap Piercing No Yes
Case comparison between LPLC, HPLC and CE
Meditop – Sebia Distributor MeetingBangkok – November 2007
Based on our experience in Thailand, we can say that the advantages of Capillary Electrophoresis (CE) vs Low Pressure Liquid Chromatography (LPLC) and High Performance Liquid Chromatography (HPLC) are:
1. CE can separate and quantify the various types of alpha-thalassemia and beta-thalassemia: it gives % Hb H, % Hb Bart’s and % Hb CS.
LPLC and HPLC cannot separate Hb H from Hb Bart’sand cannot show their percentage, so they can be used only to analyse Beta-thalassemia.
Chromatogram of EA Bart’s diseaseLPLC vs CE
Chromatogram of Beta thal / Hb E diseaseLPLC vs CE
Chromatogram of Beta thal / Hb E diseaseHPLC vs CE
Chromatogram of Hb H diseaseLPLC vs CE
Chromatogram of Hb H disease (case with blood transfusion history) HPLC vs CE
Chromatogram of Hb Bart’s hydrop fetalisHPLC vs CE
Chromatogram of Hb H disease (newborn)HPLC vs CE
2. CE can separate exactly Hb E from Hb A2 and allows to quantify the percentage of Hb E, which is important in case of blood transfusion.
CE can distinguish Homozygous Hb E disease from Beta-thalassemia with Hb Edisease, which is especially useful in cord blood analysis, whereas LPLC and HPLC cannot separate Hb E from Hb A2 nor quantify them.
Chromatogram separating Hb E and Hb A2 (HPLC vs CE)
Chromatogram separating Hb E & Hb A2 (case with blood transfusion history) (LPLC vs CE)
3. CE can distinguish between Hb A๒ and other Hb A๒ variants as well as quantify their concentrations, whereas LPLC and HPLC cannot always either separate or quantify them.
LPLC and HPLC can show misleading results: a high Hb A2 concentration in Alpha and Delta-thalassemia (actually normal Beta-globin gene) leads to a false positive of Beta-thalassemia.
Chromatogram separating Hb A2 variants(HPLC vs CE)
4. CE has high sensitivity and specificity: it detects Hb Constant Spring as effectively as DNA analysis.
CE can quantify Hb CS even at concentrations of less than ๐.๑%, whereas HPLC and LPLC cannot quantify it at all.
Chromatogram of Hb CS heterozygoteLPLC vs CE
Chromatogram of Hb E trait / Hb CSHPLC vs CE
5. Using CE, the slight difference of migration between Hb S and Hb D allows the user to easily distinguish between them by overlaying the electropherogram with a reference curve memorized in the CE software.
Chromatogram of Hb S heterozygoteLPLC vs CE
6. CE throughput is 34 samples/hr for Hb typing, whereas LPLC throughput is 6 samples/hr and HPLC throughput is 9 samples/hr. So, CE analyzer does the work of 6 LPLC analyzers or 4 HPLC analyzers, and does it much better.
Capillarys II allows:
-Throughput of up to 34 samples/hr for Hb typing
-up to 150,000 graphs and results stored on the hard disk
-Quality control features (L-J chart, statistics)
- Bi-directional and network capabilities
-Customized reports
Feature comparison between Capillarys II, Hb Gold, Variant I and Variant II
Features Capillarys II Hb Gold Variant I Variant II
Throughput 34 samples/hr
6 samples/hr
9 samples/hr
9 samples/hr
Data storage capacity
150,000 samples
99 samples No storagecapacity
Previous &Current sample
Ability to separate & quantify Hb E and Hb A2
Yes No No No
Ability to quantify Hb H, Hb Bart’s & Hb CS
Yes No No No
Feature comparison between Capillarys II, Hb Gold, Variant I and Variant II
Features Capillarys II Hb Gold Variant I Variant II
Q.C., L-J chart, statistics
Yes No No No
Analytical capability
1.Protein electrophoresis2.Immunotyping3.CDT (Carbohydrate deficient transferrin)4.HR (High resolution protein electrophoresis)
HbA1C HbA1C HbA1C
Network capabilities
Yes No No No