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| Jayapal J. Manikandan; Renji Reghunathan; Alirio Jose Melendez; Peter Natesan Pushparaj. |
| Receptors for the constant (Fc) region of immunoglobulin G, play an important role in linking the humoral and cellular arms of immune response. Three different classes of receptors have been defined, FcγRI (CD64), FcγRII (CD 32), and FcγRIII (CD16). We have previously shown that in a human monocyte model (IFNγ-primed U937 cells), FcγRI and FcγRII stimulation trigger two very distinct intracellular signalling pathways. Here we show for the first time, the use of oligonucleotide microarrays to investigate the overall gene-expression profile of human monocytes triggered with FcγRI or FcγRII. Our data indicate that several interesting genes are differentially expressed in response... |
| Tipo: Poster |
Palavras-chave: Immunology; Molecular Cell Biology; Bioinformatics. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1149/version/1 |
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| Peter Natesan Pushparaj; Jayapal J. Manikandan; Alirio Jose A. J. Melendez. |
| Severe acute respiratory syndrome (SARS) emerged in 2003, as a new epidemic form of life-threatening infection. As of 26th September 2003, there were 8422 cases of SARS from 29 countries with 908 deaths (WHO). However, the pathogenesis of SARS is poorly understood. To understand the host response to this pathogen, we profiled the gene expression patterns of peripheral blood mononuclear cells (PBMC) from SARS patients compared to healthy controls using one of the latest techniques, high density oligonucleotide expression probe array (HG-Focus array, Gene Chip, Affymetrix, Santa Clara, CA). High-density oligonucleotide microarray is a promising approach for high throughput analysis. It has been extensively
used in many areas of biomedical... |
| Tipo: Poster |
Palavras-chave: Immunology; Molecular Cell Biology; Bioinformatics. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1145/version/1 |
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| Jayapal J. Manikandan; Peter Natesan P. N. Pushparaj; Alirio Jose A. J. Melendez. |
| Systemic anaphylaxis is considered to be a typical immediate hypersensitivity response, determined by the activation of immune cells,
via antigen-induced aggregation of IgE-sensitized FcεRI cells. Perhaps most the important cells, in the immediate hypersensitivity responses, are mast cells. We have previously shown that SPHK1 plays a key role in the intracellular signaling pathways triggered by FceRI aggregation on human
mast cells. More recently, we performed a genome-wide gene expression profiling of human mast cells, sensitized with IgE alone, or stimulated by FcεRI aggregation. We found that sphingosine kinase 1 (SPHK1) was one
of genes activated at the earlier stages of mast cell... |
| Tipo: Poster |
Palavras-chave: Immunology; Molecular Cell Biology; Pharmacology. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1147/version/1 |
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| Jayapal J. Manikandan; Alirio Jose P. N. Melendez; Peter Natesan A. J. Pushparaj. |
| Mast cell activation, mediates type-1 allergic responses, one of the most powerful reactions of the immune system. However, mast cells activation is becoming increasingly linked to inflammatory, autoimmunity, and to adaptive immunity by regulating T-cell activation.
Here we analyzed the gene expression pattern in IgE-sensitized and FcεRI aggregation on human mast cells. Our data revealed coordinated changes in gene expression. We observed increased expression of gene-transcripts involved in allergic, innate and adaptive
immune responses. Among the most prominent findings is the increased expression of transcripts encoding for MIP3a, SPARCL1, AREG, IL18, CCL1, TNFRSF9, IL1b, CX3CR1, PTGER3, MIF, MMP12, ADORA3,... |
| Tipo: Poster |
Palavras-chave: Immunology; Molecular Cell Biology; Pharmacology; Bioinformatics. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1150/version/1 |
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