“Cellular phenotyping and application of cytometry for diagnostics...
Transcript of “Cellular phenotyping and application of cytometry for diagnostics...
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“Cellular phenotyping and application of cytometry for diagnostics purposes”
Part I
dr n. med. Karolina Bukowska-Straková
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Flow cytometry (abbreviated: FCM) is a technique for counting and examining microscopic particles, such as cells and chromosomes, by suspending them in a stream of fluid and passing them by an electronic detection apparatus. It allows simultaneous multiparametric analysis of the physical and/or chemical characteristics of up to thousands of particles per second. Flow cytometry is routinely used in the diagnosis of health disorders, especially blood cancers, but has many other applications in both research and clinical practice. A common variation is to physically sort particles based on their properties, so as to purify populations of interest.
Flow cytometry - wikipedia definition ;-)
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Forward scatter - FSC
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Forward scatter - FSC
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Forward scatter - FSC
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Forward scatter - FSC
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Side scatter - SSC
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Side scatter - SSC
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FSC versus SSC
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Monoclonal antibodies – Monoclonal antibodies – conjugated with fluorochromeconjugated with fluorochrome
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Monoclonal antibodies (mAbs or moAbs)Monoclonal antibodies (mAbs or moAbs)
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Monoclonal antibodies (mAbs or moAbs):Monoclonal antibodies (mAbs or moAbs):
- made by identical immune cells that are all clones of a unique parent cell
- monospecific → monovalent affinity bind to the same epitope.
José M. Casasnovas, Mykol Larvie and Thilo StehleThe EMBO Journal (1999) 18, 2911 - 2922
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Monoclonal antibodies (mAbs or moAbs):Monoclonal antibodies (mAbs or moAbs):
The same: isotype, allotype, idiotype Idiotype -differences in Ag recognition
Isotype -different heavy chains:µ, δ, γ, ε, αor light chains:κ, λ
Allotype- Individual
differences in amino acid sequence
(polymorphisms)
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Fluorochrome excitationFluorochrome excitation
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Flow cytometry
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Lasers / fluorochroms
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Fluorochrome chooseFluorochrome choose
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Mean fluorescence intensity
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Data presentation
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Our instrument – LSR II 10 colors
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Immunophenotyping of leukocytes
• Flow cytometric immunophenotyping with (monoclonal) antibodies
allows the recognition of leukocyte subsets.
• The CD nomenclature has created clarity in the field of membrane
bound leukocyte antigens (but not for intracellular markers)
• These CD antibodies recognise many different types of markers
(lineage specific, differentiation stage specific, etc) and thereby allow
the recognition of many different (immature and mature) leukocyte
subsets.
• Usage of multiparameter analyses allow the dissection of
differentiation and maturation pathways as well as the detecion of
specific proteins (see: Van Lochem et al. Cytometry 2004;60B:1-13).
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Immature markers T-cell markers
CD34: precursor marker CD1: common thymocyte marker
TdT: terminal deoxnucleotidyl transferase CD2: pan-T-cell marker
CD117: myeloid precursor marker CD4: helper T-cell marker
HLA-DR: precursor cells (and APC cell) CD8: cytotoxic T-cell marker
CD3: mature T-cell marker
B-cell markers TCR: T-cell receptor
CD10: immature B-cell marker
CD19: pan-B-cell marker Myeloid markers
CD20: mature B-cell marker CD13 and CD33: pan-myeloid
SmIg: membrane bound Ig CD14: monocytic marker
CyIg: cytoplasmic Ig CD15: granulocytic marker
Classical leukocyte markers
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Hematopoiesis
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Physiologicalbalance of hematopoiesis
Its regulation depends on:cytokines, celluler interactions, transcription and metabolic factors
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Hematopoietic cells may be missing or do not function properly
Immuno-deficiencies
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Flow cytometry in primary immunodeficiency
Flow cytometric immunphenotyping and functional studies of blood / bone marrow / other material
Targeted analysis of immune cells: 1) are all cells present in normal frequencies;2) do they have all relevant proteins expressed;3) is their function normal?
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Primary immunodeficiencies (PID)
Combined T and B-cell defectsPredominantly antibody deficiencies
Diseases of immune dysregulaton
Other well defined immunodeficiency syndromes
Congenital defects in fagocyte number or/and function
Defects in innate immunityDNA repair defects
Complement deficiencies
Alternative complement pathway defects
Regulatoty proteins of complement
Periodic fever syndromes
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Peripheral blood lymphocyte subpopulations
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Enumeration of lymphocyte subsets in PB healthy control
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Enumeration of lymphocyte subsets in PB SCID T-B+NK- (common γ chain)
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David Vetter – bubble boy
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Enumeration of lymphocyte subsets in PB SCID T-B-NK- (ADA deficiency)
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Enumeration of lymphocyte subsets in PB XLA patient
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CSFE, 10 min, 37C
wash free CSFE
Culture with Ag/mitogen
Lymphocytes
Proliferation assay
culture
Signal from unstimulated cells
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CSFE, 10 min, 37C
wash free CSFE
Culture with Ag/mitogen
Lymphocytes
Proliferation assay
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Chronic granulomatous disease → NADPH oxidase
Medical Immunology 2006 5:4
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CGD anti-gp91phox
Healthy
X-linked CGD
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+
Reactive oxygen species – FCM measurement(superoxide anion)
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Reactive oxygen species – FC measurement(hydrogen peroxide)
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Hematopoietic cells may undergo malignant transformation into an abnormally proliferating
leukemic cells
LeukemiaLymphoma
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Leukemias and Lymphomas
Leukemias (acute or chronic) and lymphomas can be regarded as malignant counterparts of
normal hematopoietic cells in different maturation stages.
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B-ALL
T-ALL
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M0 minimally differentiated acute myeloblastic leukemia M1 acute myeloblastic leukemia, without maturationM2 acute myeloblastic leukemia, with granulocytic maturation M3 promyelocytic, or acute promyelocytic leukemia (APL) M4 acute myelomonocytic leukemia
M4eo myelomonocytic together with bone marrow eosinophilia M5 (M5a) acute monoblastic leukemia
(M5b) acute monocytic leukemia M6 (M6a) acute erythroid leukemias, including erythroleukemia
(M6b) very rare pure erythroid leukemia M7 acute megakaryoblastic leukemia
AML - AML - Acute myeloid leukemia
ALLALL -Acute lymphoblastic leukemiaB-ALL from B lineageT-ALL from T lineage
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Flow cytometry in hematology
Immunophenotyping plays an important role in establishing the diagnosis and classifying hematopoietic malignancies and is a basic
investigation, which precisely defines the lineage and stage of differentiation of malignantly transformed
hematopoietic cells.
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CD45 expressionPB vs normal BM
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Pro-B-cell
CD34TdT
CD22
Pre-B-I-cell(Pre-pre-B-cell)CD34TdTCD10bright
CD19
CD22CD45dim
Pre-B-II-cell(Pre-B-cell)
(TdT)CD10CD19CD20-/dim
CD22CD45CyIgµ
Immature B-cell(tr. Pre-B-cell)
CD10dim
CD19CD20CD22CD45bright
SmIgµ
Mature B-cell
CD19CD20CD22bright
CD45bright
SmIgµ
Plasma cell
CD19
CD45Cy/SmIg
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Pro-B-cell
CD34TdT
CD22
Pre-B-I-cell(Pre-pre-B-cell)CD34TdTCD10bright
CD19
CD22CD45dim
Pre-B-II-cell(Pre-B-cell)
(TdT)CD10CD19CD20-/dim
CD22CD45CyIgµ
Immature B-cell(tr. Pre-B-cell)
CD10dim
CD19CD20CD22CD45bright
SmIgµ
Mature B-cell
CD19CD20CD22bright
CD45bright
SmIgµ
Plasma cell
CD19
CD45Cy/SmIg
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Pro-B-cell Pre-B-I-cell(Pre-pre-B-cell)
Pre-B-II-cell(Pre-B-cell)
Immature B-cell(tr. Pre-B-cell)
Mature B-cell Plasma cell
Normal B-celldevelopment
Regenerating B cell precursor in bone marrowafter cytotoxic treatment
Physiological shift in B-cell compartment
Age-related shifts inB-cell compartment of elderly individuals
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Lymphoid differentiation
1.
2.
3. 4. 5. 6. 7. 8. 9. 10.1. AUL2. proB ALL3. cALL4. preB ALL5. Trans. preB6. B-CLL7. HCL8. BL, DLBL, MALT9. LPL10. MM
11. Immature T-ALL12. c T-ALL13. Mature T-ALL14. T-LGL15. NK-LGL
11. 12.
13. 14.
15.
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Myeloid differentiation
A. Plesa, 2008
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Myelo/monoblastCD34CD117HLA-DRCD13CD33
Pro-monocyte
HLA-DRCD13high
CD33high
CD11bCD15dim
Monocyte
HLA-DRCD13high
CD33high
CD11bCD15dim
CD14
Macrophage
HLA-DRCD13CD33CD11b
CD14
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Myelo/monoblastCD34CD117HLA-DRCD13CD33
Promyelocyte
CD117
CD13high
CD33high
CD15
Myelocyte
CD13dim
CD33dim
CD15CD11b
Neutrophil
CD13high
CD33CD15CD11bhigh
CD16high
Metamyelocyte
CD13CD33dim
CD15CD11bCD16
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Myeloid differentiation
0.
0. AML-M01. AML-M12. AML-M23. AML-M34. AML-M45. AML-M56. AML-M67. AML-M7
1.
2. 3.
4. 5.
6.
7.
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Thank you for your attention =)