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SHH is downstream of immediate early genes and is targeted by chemotherapy on a specific enhancer [CUT&Tag, ATAC-seq]

ABSTRACT: Sonic Hedgehog (SHH) signaling is a key regulator of embryonic development and tissue homeostasis, and is involved in gastrointestinal (GI) cancer progression. Here we show that SHH gene expression is down-regulated by chemotherapy drugs. The 139Kb upstream enhancer is specifically targeted by the immediate early gene EGR1.

ORGANISM(S): Homo sapiens

PROVIDER: GSE183663 | GEO | 2021/12/31

REPOSITORIES: GEO

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SHH is downstream of immediate early genes and is targeted by chemotherapy on a specific enhancer [RNA-seq]

Project description:Sonic Hedgehog (SHH) signaling is a key regulator of embryonic development and tissue homeostasis, and is involved in gastrointestinal (GI) cancer progression. Here we show that SHH gene expression is down-regulated by chemotherapy drugs.

2021-12-31 | GSE183977 | GEO

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Transcription profiling by array of rat cerebellar granular neuronal precursor cells plated with Sonic Hedgehog (Shh) and then treated with the PKA activator DBA

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Posterior Second Heart Field (pSHF) transcriptomes of wild-type and Shh mutant mouse embryos

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Posterior Second Heart Field (pSHF) transcriptomes of wild-type and Shh mutant mouse embryos

Project description:To understand Sonic hedgehog homolog (Shh)-mediated molecular networks in the posterior second heart field (pSHF), we have employed whole genome microarray expression profiling as a discovery platform to identify genes with Shh-dependent expressional changes. We microdissected the pSHF from E9.5 embryos and compared the Shh mutant samples with than of wild-type using Agilent 4x44k Mouse Whole Genome Arrays (n = 4 WT pools and 4 Shh - /- pools). Microdissected pSHF from E9.5 mouse embryos was molecularly verified by real-time PCR. Shh mutant embryos were compared with wild-type embryos. Four independnet pools of RNAs from each biological group were measured on 1-color Agilent Mouse Whole Genome Arrays (n = 3 WT pools and 4 Shh -/- pools).

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Expression data at 24 hours after the blocking of Shh signaling in tooth germs at embryonic day 14

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Polarized Dock Activity Drives Shh-Mediated Axon Guidance

Project description:In the developing spinal cord, Sonic hedgehog (Shh) attracts commissural axons toward the floor plate. How Shh regulates the cytoskeletal remodeling that underlies growth cone turning is unknown. We found that Shh-mediated growth cone turning requires the activity of Docks, which are unconventional GEFs. Knockdown of Dock3 and 4, or their binding partner ELMO1 and 2, abolished commissural axon attraction by Shh in vitro. Dock3/4 and ELMO1/2 were also required for correct commissural axon guidance in vivo. Polarized Dock activity was sufficient to induce axon turning, indicating that Docks are instructive for axon guidance. Mechanistically, we show that Dock and ELMO interact with Boc, the Shh receptor, and that this interaction is reduced upon Shh stimulation. Furthermore, Shh stimulation translocates ELMO to the growth cone periphery and activates Rac1. This identifies Dock/ELMO as an effector complex of non-canonical Shh signaling and demonstrates the instructive role of GEFs in axon guidance.

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Expression data at 24 hours after the blocking of Shh signaling in tooth germs at embryonic day 14

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2011-02-22 | E-GEOD-27429 | biostudies-arrayexpress

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