pinhas p. schachter1 m.d., suhail ayesh2 phd, tamar schneider2,
DESCRIPTION
Expression of kinase genes in primary hyperparathyroidism; Adenoma versus hyperplastic parathyroid tissue. Pinhas P. Schachter1 M.D., Suhail Ayesh2 PhD, Tamar Schneider2, Morris Laster M.D., Abraham Czerniak1 M.D. and Abraham Hochberg2. Background. - PowerPoint PPT PresentationTRANSCRIPT
Expression of kinase genes in primary Expression of kinase genes in primary hyperparathyroidism;hyperparathyroidism;Adenoma versus hyperplastic parathyroid Adenoma versus hyperplastic parathyroid tissuetissue
Pinhas P. Schachter1 M.D., Suhail Ayesh2 PhD, Tamar Schneider2,
Morris Laster M.D., Abraham Czerniak1 M.D. and Abraham Hochberg2
BackgroundBackground
Differentiation between parathyroid hyperplasia and adenoma is difficult and based on the surgeon’s skill. Microarrays and other sophisticated research tools generate information about differential gene expression in various tissues.
Exploration of genes that express differentially in one tissue will enable identification and perhaps development of new methods of preoperative or intraoperative diagnosis.
MethodsMethods
• RNA was extracted from parathyroid hyperplasia and adenoma tissue and hybridized to a microarray containing 359 human cDNAs of known kinase genes.
• Signals of exposure were scanned and quantified with Atlas – Image, version 2, software for digital image analysis. The program generates a color schematic comparison view and numerical data in a tabular format for further analysis.
Expression of kinase genes In Adenoma Expression of kinase genes In Adenoma Parathyroid TissueParathyroid Tissue
Expression of kinase genes In hyperplasia Parathyroid Expression of kinase genes In hyperplasia Parathyroid TissueTissue
The first row data format in text modeThe first row data format in text mode
The second excel format of dataThe second excel format of data
The third access format after classeficationThe third access format after classefication
Table 1 Genes expressed in Parathyroid hyperplasia onlyTable 1 Genes expressed in Parathyroid hyperplasia only
Table 2 Genes expressed in Parathyroid adenoma onlyTable 2 Genes expressed in Parathyroid adenoma only
Table 3 Genes up regulated in Parathyroid adenomaTable 3 Genes up regulated in Parathyroid adenoma
Table 4 Genes down regulated in Parathyroid adenomaTable 4 Genes down regulated in Parathyroid adenoma
Table 5 Genes categories by functionTable 5 Genes categories by function
ConclusionConclusion
The ratio values that are considered significant (<0.5 or >1.5) suggest that genes up-regulated in parathyroid adenoma are those responsible for angiogenesis and production of blood vessels. Genes down-regulated in parathyroid adenoma and expressed in hyperplasia are related to a decrease in apoptosis. Moreover, an interesting gene expressed only in the hyperplasia sample is increased in relation to in vivo proliferation activities
http://research.dfci.harvard.edu/korsmeyer/MLL.htmhttp://research.dfci.harvard.edu/korsmeyer/MLL.htm
• MLL translocations specify a distinct gene expression profile that distinguishes a unique leukemia Scott A. Armstrong1–4, Jane E. Staunton5, Lewis B.
Silverman1,3,4, Rob Pieters6, Monique L. den Boer6, Mark
D. Minden7, Stephen E. Sallan1,3,4, Eric S. Lander5, Todd R. Golub1,3,4,5* & Stanley J. Korsmeyer2,4,8*
*These authors contributed equally to this work.
AbstractAbstract• Acute lymphoblastic leukemias carrying a chromosomal translocation
involving the mixed-lineage leukemia gene (MLL, ALL1, HRX) have a particularly poor prognosis. Here we show that they have a characteristic, highly distinct gene expression profile that is consistent with an early hematopoietic progenitor expressing select multilineage markers and individual HOX genes.
Clustering algorithms reveal that lymphoblastic leukemias with MLL translocations can clearly be separated from conventional acute lymphoblastic and acute myelogenous leukemias.
We propose that they constitute a distinct disease, denoted here as MLL, and show that the differences in gene expression are robust enough to classify leukemias correctly as MLL, acute lymphoblastic leukemia or acute myelogenous leukemia.
Establishing that MLL is a unique entity is critical, as it mandates the examination of
selectively expressed genes for urgently needed molecular targets.
Genes that distinguish ALL from MLL. The 100 genes that Genes that distinguish ALL from MLL. The 100 genes that are most highly correlated with the class distinctionare most highly correlated with the class distinction
Selected early lymphocyte gene expression in ALL and Selected early lymphocyte gene expression in ALL and MLLMLL
Selected HOX gene expression in ALL and MLLSelected HOX gene expression in ALL and MLL
Comparison of gene expression between ALL, Mll and AML Comparison of gene expression between ALL, Mll and AML
ALL (red), MLL (blue), AML (yellow)ALL (red), MLL (blue), AML (yellow)
Genes that are specifically expressed in MLL, ALL or MLLGenes that are specifically expressed in MLL, ALL or MLL
Classification of ALL, MLL and AML on the basis of their gene Classification of ALL, MLL and AML on the basis of their gene expression profile. The error rate in class prediction (y axis) is plotted expression profile. The error rate in class prediction (y axis) is plotted
against the number of genes used to build the model (x axis).against the number of genes used to build the model (x axis).