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The transcriptomic effect of induced LRIG1 expression in NPC cells

ABSTRACT: As LRIG1 known to be a negative regulator of EGFR, we postulate that restored LRIG1 expression will change the transcription profile through the regulation of EGFR as well as its downstream signal cascades. Thus, we conducted a time-course microarray study to examine the effect of restored LRIG1 expression in NPC line, TW01-LG1/a, which the LRIG1 expression is under the control of a promoter with Doxycycline response element.

ORGANISM(S): Homo sapiens

PROVIDER: GSE37349 | GEO | 2013/05/02

SECONDARY ACCESSION(S): PRJNA159723

REPOSITORIES: GEO

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The transcriptomic effect of induced LRIG1 expression in NPC cells

Project description:As LRIG1 known to be a negative regulator of EGFR, we postulate that restored LRIG1 expression will change the transcription profile through the regulation of EGFR as well as its downstream signal cascades. Thus, we conducted a time-course microarray study to examine the effect of restored LRIG1 expression in NPC line, TW01-LG1/a, which the LRIG1 expression is under the control of a promoter with Doxycycline response element. We established stable transfectants of the LRIG1 gene in the TW01 cells which the expression of LRIG1 protein was barely detectable. To control the expression of LRIG1, the coding sequences were placed under the control of a promoter with doxycycline (Dox)-response element using the Tetoff system. Thus the LRIG1 expression could be turn on by removing Dox from the culture medium. Cellular total RNA were harvested along a time course of 12, 24, 36, and 48 hr following LRIG1 turn on expression, and then subjected to exon array analysis (Affymatrix Human Gene 1.0 ST), using the LRIG1 non-expressing sample (with Dox) as control for all comparison. For each time-point, a biological replicate was included.

2013-05-02 | E-GEOD-37349 | biostudies-arrayexpress

LRIG1 is a gatekeeper to exit from quiescence in adult neural stem cells

Project description:Adult neural stem cells (NSCs) must tightly regulate quiescence and proliferation. Single cell analysis has suggested a continuum of cell states as NSCs exit quiescence. Here we capture and characterize in vitro primed quiescent NSCs and identify LRIG1 as an important regulator. We show that BMP-4 signaling induces a dormant non-cycling quiescent state (d-qNSCs), whereas combined BMP-4/FGF-2 signalling induces a distinct primed quiescent state poised for cell cycle re-entry. Primed quiescent NSCs (p-qNSCs) are defined by high levels of LRIG1 and CD9, as well as an interferon response signature, and can efficiently engraft into the adult subventricular zone (SVZ) niche. Genetic disruption of Lrig1 in vivo within the SVZ NSCs leads an enhanced proliferation. Mechanistically, LRIG1 primes quiescent NSCs for cell cycle re-entry and EGFR responsiveness by enabling EGFR protein levels to increase but limiting signaling activation. LRIG1 is therefore an important functional regulator of NSC exit from quiescence.

2021-03-18 | GSE168189 | GEO

Gene expression data of nasopharyngeal carcinoma (NPC) cell and Podoplanin (PDPN) siRNA treatment

Project description:Podoplanin, a transmembrane sialomucin-like glycoprotein, is now widely used as a marker for lymphatic endothelial cells and fibroblastic reticular cells in lymphoid organs, but its study in nasopharyngeal carcinoma (NPC) is still limited. The aims of this study were t characterize the role of PDPN in NPC. Our results showed that PDPN was expressed in most TW01 NPC cells. PDPN knockdown by siRNA decreased NPC cell proliferation, migration, and invasion. Knocking down PDPN results in suppression of NPC cell proliferation, migration, and invasion. PDPN may serve as a potential chemotherapeutic target for NPC treatment in the future.

2019-03-19 | GSE128502 | GEO

RNA-seq analysis of Lrig1+ and Lrig1- CD4+ T cells in mouse spleen

Project description:Regulatory T cell (Treg) is the immune-suppressive T cell subset and the crucial component for preventing autoimmunity. The molecules defining the suppressive population of T cells phenotypically and functionally remain to be discovered. In this study, we report that Lrig1 is highly expressed in suppressive CD4+ T cell populations. We performed RNA-seq analysis of CD4+Lrig1+ and CD4+Lrig1- T cells from mouse splenocytes to analyze the genes involeved in the suppressive function of T cells.

2023-07-16 | GSE236988 | GEO

cDNA microarray analysis of miR-1 transfected HeLa and NPC-TW01 cells

Project description:To investigate the mechanisms of miR-1 inducing apoptosis, we performed cDNA expression microarray analysis to identify the candidate miR-1 regulating genes that are involved in apoptosis. NPC-TW01 cells were transfected with miR-1 or miR-negative control for 40 hours, their total RNA were isolated from the cells and hybridized to an Agilent human whole genome oligo 4 x 44 K microarray. HeLa cells were transfected with miR-1 or miR-negative control for 40 hours, their total RNA were isolated from the cells and hybridized to an Agilent human whole genome oligo 4 x 44 K microarray.

2011-04-13 | E-GEOD-28522 | biostudies-arrayexpress

Expression analysis of Lrig1-eGFP+ve and -ve cells from small intestine

Project description:Expression profiling array of Lrig1 expressing and non-expressing cells isolated by flow cytometry from the intestinal epithelium of Lrig1:eGFPiresCreERT2 (Lrig1 KI) animals.

2013-08-15 | E-MTAB-1602 | biostudies-arrayexpress

Mouse Mist1 and Lrig1 apc tumors

Project description:Mouse Mist1 and Lrig1 apc tumors

| PRJNA804102 | ENA

Copy number variation analysis of nasopharyngeal carcinoma cell lines

Project description:To analyze the global copy number aberrations of two nasopharyngeal carcinoma cell lines, TW01 and HONE1. Global copy number aberrations were analyzed by using high-resolution oligoarray CGH on two NPC cell lines, TW01 and HONE1. The overviews of array CGH profiles reveal high similarity between both NPC cell lines, but the degree of copy-number alterations were more severe in TW01 than in HONE1. There were 1204 and 1513 genes with copy-number gain (CNVs with aberration score > 0.5 and number of contiguous probes ≥ 3) in TW01 and HONE1, respectively. Among them, 850 were commonly amplified in both cell lines (Gain-TH). There were 3525 genes and 926 genes with copy-number loss (CNVs with aberration score < 0.5 and number of contiguous probe ≥ 3) in TW01 and HONE1, respectively. Among them, 582 were commonly deleted in both cell lines (Loss-TH). The most prominent CNVs observed including gain on 3q26.2-q26.31, loss on 3p21.2-q12.1, 9p24.3-p21.3, and nearly the whole Y chromosome.

2010-03-09 | GSE15172 | GEO

Expression profiling of nasopharyngeal carcinoma cell lines

Project description:To identify the deregulated genes which may involved in the carcinogenesis of nasopharyngeal carcinoma (NPC). To identify potential tumor suppressor genes / oncogenes of NPC, we have employed whole genome microarray expression profiling as a discovery platform to analyze two NPC cell lines, TW01 and HONE1. For the purpose to filter out differential genes may not related to carcinogenesis of NPC, a gene expression database for premalignant nasopharyngeal epithelial cells was obtained from NP460hTert cells, and we used the commercial universal human RNA (stratagene) as common reference for all microarray experiments. A total of 1272 genes were commonly up-regulated (fold change > 2) and 1810 genes were commonly down-regulated (fold change < 0.5) in TW01 and HONE1 cell lines, whereas not deregulated in NP460hTert cells.

2010-03-09 | GSE15170 | GEO

RNA-seq data of nasopharyngeal carcinoma (NPC) cell and GO-PEG_erlotinib treatment

Project description:graphene oxide (GO) is found to be a promising novel anti-cancer drug carrier. Erlotinib, a tyrosine kinase inhibitor (TKI) acting on the epidermal growth factor receptor (EGFR), has been proved for locally advanced or metastatic non-small cell lung cancer (NSCLC) and in combination with gemcitabine for locally advanced or metastatic pancreatic cancer in 2004, but its study in nasopharyngeal carcinoma (NPC) is still limited. We designed functionalized GO, polyethylene glycol-coated GO (GO-PEG), as drug carriers, which was loaded with erlotinib and showed promising anticancer effect on NPC cells. Our results showed that GO-PEG-erlotinib effectively suppressed NPC cell proliferation, migration, and invasion, likely by several mechanisms. GO-PEG-erlotinib may be the potential therapeutic agents for treating NPC in the future.

2021-12-27 | GSE151195 | GEO

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