Olga A. Gra, Julia V. Sidorova, Eugene A. Nikitin, Alexander Y

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Presentation transcript:

Analysis of T-Cell Receptor-γ Gene Rearrangements Using Oligonucleotide Microchip  Olga A. Gra, Julia V. Sidorova, Eugene A. Nikitin, Alexander Y. Turygin, Sergey A. Surzhikov, Anait L. Melikyan, Andrey B. Sudarikov, Alexander S. Zasedatelev, Tatyana V. Nasedkina  The Journal of Molecular Diagnostics  Volume 9, Issue 2, Pages 249-257 (April 2007) DOI: 10.2353/jmoldx.2007.060087 Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 1 Scheme of the microchip for detecting T-cell clonality by rearrangements of the TCR-γ locus. Gel pads with oligonucleotides complementary to sequences of the Vγ genes of family 1 (Vγ 1-8) are shown dark gray, gel pads with oligonucleotides complementary to sequences of the Vγ genes of families 2, 3, and 4 (Vγ9, Vγ10, Vγ11) are shown light gray, and gel pads with oligonucleotides complementary to sequences of the Jγ genes are shown white. Each oligonucleotide is used in duplicate on the microchip. The Journal of Molecular Diagnostics 2007 9, 249-257DOI: (10.2353/jmoldx.2007.060087) Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 2 a: Hybridization pattern obtained on the microchip with a polyclonal sample. b: Analysis of the results. The TS is shown with a horizontal line. None of the signals exceeds the TS. The Journal of Molecular Diagnostics 2007 9, 249-257DOI: (10.2353/jmoldx.2007.060087) Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 3 a: Hybridization pattern obtained on the microchip with a clonal sample. b: Analysis of the results suggesting a clonal rearrangement of the TCR-γ locus. The TS is shown with a horizontal line. Signals from gel pads Vγ2, Vγ10, and Jγ1/2 exceed the TS and suggest a biallelic clonal rearrangement of the TCR-γ locus with the involvement of the Vγ2, Vγ10, and Jγ1/2 genes. The Journal of Molecular Diagnostics 2007 9, 249-257DOI: (10.2353/jmoldx.2007.060087) Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 4 a: Hybridization pattern obtained on the microchip with oligoclonal sample. b: Analysis using the threshold signal (TS) equal to <J> + 3 × σ (TS is shown with a horizontal line). c: Analysis using the TS equal to <J> + 4 × σ. The Journal of Molecular Diagnostics 2007 9, 249-257DOI: (10.2353/jmoldx.2007.060087) Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions

Figure 5 Sensitivity assay. Hybridization pattern (a) and analysis of the results (b) for a sample containing 10% of Jurkat cells. Signals from gel pads Vγ8, Vγ11, and Jγ1/2 exceed the TS and suggest a biallelic clonal rearrangement of the TCR-γ locus with the involvement of the Vγ8, Vγ11, and Jγ1/2 genes. Hybridization pattern (c) and analysis of the results (d) for a sample containing 5% of Jurkat cells. Only signal from gel pad Vγ11 hardly exceeds the TS; there is no sufficient data in favor of clonal rearrangement. The Journal of Molecular Diagnostics 2007 9, 249-257DOI: (10.2353/jmoldx.2007.060087) Copyright © 2007 American Society for Investigative Pathology and Association for Molecular Pathology Terms and Conditions