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Published byAndrew Wright Modified over 9 years ago
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Dr. Derakhshandeh, PhD PND & PGD Prenatal Diagnosis Preimplantation Diagnosis
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KARYOTYPING genome mutations: changes in chromosome number changes in chromosome number
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Technique Karyotyping, conventional cytogenetics
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Down Syndrome (Trisomy 21( Trisomy 2(
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Down Syndrome (Trisomy 21(
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Trisomy 18, 47 Ch
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chromosome mutations: changes in chromosome structure
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CHANGES IN CHROMOSOME STRUCTURE Translocations Large Deletions/Insertions Inversions Duplications/Amplifications
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DiGeorge/Velo-Cardio-Facial/CATCH 22/Shprintzen Syndrome which is caused by a microdeletion on chromosome 22
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painting" probe for chromosome 4q
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A probe for the terminal part of chromosome 4q.
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probe for Steroid Sulfatase Deficiency which is caused by a microdeletion on the X chromosome. The "Xp22.3" probe signal is located at the Steroid Sulfatase region at Xp22.3. Since there are two X chromosomes and only one has the Steroid Sulfatase gene signal.
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Interphase FISH Examples 13 (green), and 21 (red) 18 (aqua), X (green), and Y (red).
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female fetus with trisomy-21 chromosomes 18 (aqua), X (green), and Y (red). chromosomes 13 (green), and 21 (red) chromosomes 13 (green), and 21 (red)
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Detection of trisomy 21 by HGQ-PCR Lanes 1–16 Serial dilutions for a normal individual and aDown’s syndrome patient HGQPCR (quantitative fluorescece)
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PND & PGD -Thalassemia/ -Thalassemia Haemophilia (A / B) HbD, G, E, S DMD/BMD SMA(I-III) CF; Fragile X, MD, HD, charct-Mari- Tooth
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PGD Translocation Inversion Deletion At least 2 independent blastromers/embryo
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A limiting Factor in PGD Chromosome abnormalities # 70-100 % Reduce the success of PGD
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Rules and legislation of PGD HLA typing A child as suitable donor to an already existing child Social sexing …
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