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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of human clinical pediatric acute lymphatic leukemai - ALL samples after in vitro exposure to Lasp (and matched controls)

ABSTRACT: Samples of pediatric acute lymphoblastic leukemia. All samples contain at least 90% blasts. Each sample was split into two flasks, one of which was exposed to 2IU/ml of L-asparaginase. The other flask served as a control. Cells were lysed at the times indicated.

ORGANISM(S): Homo sapiens

SUBMITTER: Janos Demeter

PROVIDER: E-SMDB-26 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Transcription profiling of clinical pediatric acute lymphoblastic leukemia ALL samples after in vitro exposure to Lasp (and matched controls)

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Clinical pediatric acute lymphoblastic leukemia samples after in vitro exposure to L-asparaginase

Project description:Samples of pediatric acute lymphoblastic leukemia. All samples contain at least 90% blasts. Each sample was split into two flasks, one of which was exposed to 2IU/ml of L-asparaginase. The other flask served as a control. Cells were lysed at the times indicated. Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set

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Clinical acute lymphoblastic leukemia samples (untreated) with known asparaginase LC50 values

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Transcription profiling by array of Saccharomyces cerevisiae in response to ethanol

Project description:The genome-wide transcriptional responses of the wild type laboratory strain, and two deletion strains (pmt7Δ/pmt7Δ and yhl042wΔ/yhl042wΔ) were comparatively investigated in the absence and in the presence of ethanol for two hours. Strains were cultivated in flasks at 30°C and 180 rpm in an orbital shaker till the mid-exponential phase of growth (OD600 of 0.85-0.95). The exponential cultures were then divided into two flasks and cells in one flask were grown without ethanol, whereas cells in the latter flask were treated with ethanol to have 8% (v/v) final ethanol concentration. In order to analyze the transcriptional response of each strain to ethanol, samples were collected 2 h after ethanol treatment from both treated and untreated cultures, immediately frozen in liquid nitrogen and stored at -80C until RNA isolation. All experiments were carried out in triplicate.

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Lasp-1 regulates podosome function.

Project description:Eukaryotic cells form a variety of adhesive structures to connect with their environment and to regulate cell motility. In contrast to classical focal adhesions, podosomes, highly dynamic structures of different cell types, are actively engaged in matrix remodelling and degradation. Podosomes are composed of an actin-rich core region surrounded by a ring-like structure containing signalling molecules, motor proteins as well as cytoskeleton-associated proteins. Lasp-1 is a ubiquitously expressed, actin-binding protein that is known to regulate cytoskeleton architecture and cell migration. This multidomain protein is predominantely present at focal adhesions, however, a second pool of Lasp-1 molecules is also found at lamellipodia and vesicle-like microdomains in the cytosol.In this report, we show that Lasp-1 is a novel component and regulator of podosomes. Immunofluorescence studies reveal a localization of Lasp-1 in the podosome ring structure, where it colocalizes with zyxin and vinculin. Life cell imaging experiments demonstrate that Lasp-1 is recruited in early steps of podosome assembly. A siRNA-mediated Lasp-1 knockdown in human macrophages affects podosome dynamics as well as their matrix degradation capacity. In summary, our data indicate that Lasp-1 is a novel component of podosomes and is involved in the regulation of podosomal function.

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