Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Atlas of Gene Expression at Microanatomical Resolution of the Submandibular Salivary Gland

ABSTRACT: The goal of this study was to generate a spatiotemporal atlas of gene expression in the developing salivary gland. This will allow us to identify changes in gene expression that may result in the formation of the different domains of the salivary gland. At least 4 microarrays per location per time point were collected. The originating samples are rather small, so many clefts, ducts and buds had to be pooled to generate enough aRNA for hybridization. Supplementary file: cluster heat map from anova 0.05 passing entities, E12.5 main bud vs E15 main bud (averaged readings)

ORGANISM(S): Mus musculus

SUBMITTER: Kurt Musselmann

PROVIDER: E-GEOD-22828 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Publications

Salivary gland gene expression atlas identifies a new regulator of branching morphogenesis.

Musselmann K K Green J A JA Sone K K Hsu J C JC Bothwell I R IR Johnson S A SA Harunaga J S JS Wei Z Z Yamada K M KM

Journal of dental research 20110627 9

During organ development, local changes in gene expression govern morphogenesis and cell fate. We have generated a microanatomical atlas of epithelial gene expression of embryonic salivary glands. The mouse submandibular salivary gland first appears as a single mass of epithelial cells surrounded by mesenchyme, and it undergoes rapid branching morphogenesis to form a complex secretory organ with acini connected to an extensive ductal system. Using laser capture microdissection, we collected samp ...[more]

PMID: 21709141

Similar Datasets

Project description:In addressing R. microplus - A. marginale interactions, we propose and test three linked hypotheses. The first is that the tick gene response is organ specific: the midgut gene regulation is unique during feeding and during acquisition of A. marginale as compared to the salivary gland. This distinction is relevant as the two organs serve very different roles in the transmission biology of A. marginale with early survival and replication within the midgut epithelium, composed of highly phagocytic cells, required for initial colonization while a second round of replication in the salivary gland acini, composed of highly secretory cells, is required for transmission of an infectious dose in the saliva. Importantly, both the midgut epithelium and salivary glands have been identified as separate and distinct barriers for transmission of A. marginale and thus represent two potential sites where transmission could be blocked. The second hypothesis to be tested is that the salivary gland transcriptome is temporally dynamic. Initiation of tick attachment and feeding involves secretion of a virtual pharmacopeia including lytic enzymes, anticoagulants, and inhibitors of the mammalian innate immune and nocioceptive systems. Concomitantly, the acini provide an environment where A. marginale replicates >100 fold and are secreted into the saliva. Prior studies show that duration of feeding is a critical component of transmission efficiency, with increased efficiency positively correlated with time of tick feeding. The third hypothesis to be tested is that A. marginale colonization does not significantly modulate the tick midgut and salivary gland transcriptome. This hypothesis is based on observations by ourselves and others that tick infection does not impart a significant fitness cost on the vector. This is in contrast to other bacterial and protozoal pathogens that have dramatic effects on success of tick attachment, engorgement, and survival. A. marginale, similar to other tick-borne pathogens in the Family Anaplasmataceeae, is believed to have evolved from an arthropod-specific bacterium with relatively late adaptation to specific niches in mammalian hosts. Consequently, we predict that A. marginale is well adapted to its tick vector and utilizes the normal signaling pathways of the feeding tick with few, if any, effects on the midgut and salivary gland transcriptome. In this manuscript, we report the testing of these three hypotheses and present the results in context of the vector-pathogen-mammalian host interaction at the time of transmission. A Roche NimbleGen high-density gene expression microarray was custom designed based on the expressed sequence tag (EST) database, B. microplus Gene Index Version 2 (BmiGI V2) for R. microplus. The expression level of 14,447 R. microplus genes was analyzed from total RNA extracted from 10 different tick tissue samples; 30 arrays were included since triplicates of each different sample were analyzed as follow: unfed (midgut and salivary glands), blood feeding (2 days midgut and 2, 6 and 9 days salivary glands), A. marginale-infected blood feeding (2 days midgut and 2, 6 and 9 days salivary glands).

Dataset Information

Atlas of Gene Expression at Microanatomical Resolution of the Submandibular Salivary Gland

Publications

Salivary gland gene expression atlas identifies a new regulator of branching morphogenesis.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets