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Thyroid Hormone (TH) Controls The Remodeling Of The Pancreas And The Liver, Part B

ABSTRACT: Thyroid hormone (TH) controls the remodeling of the pancreas and the liver. TH-induces dedifferentiation of the exocrine pancreas to a progenitor state (Proc. Nat. Acad Sci. 105, 8962-8967 (2008)) and it remodels the endocrine pancreas (Dev. Biol. 328, 384-391 (2009)). The redifferentiated frog pancreas resembles closely the pancreas of other typical vertebrates. Two pancreas arrays were carried out. The first one studied gene expression changes at different developmental stages of Xenopus laevis during metamorphosis. The second array studies gene expression changes at varying times after the addition of TH to premetamorphic tadpoles. Keywords: co-expression design,development or differentiation design,reference design,time series design

ORGANISM(S): Xenopus laevis

PROVIDER: GSE16017 | GEO | 2010/01/01

SECONDARY ACCESSION(S): PRJNA123083

REPOSITORIES: GEO

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Thyroid Hormone (TH) Controls The Remodeling Of The Pancreas And The Liver, Part A

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Thyroid Hormone (TH) Controls The Remodeling Of The Pancreas And The Liver, Part C

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2010-05-16 | E-GEOD-16018 | biostudies-arrayexpress

Thyroid Hormone (TH) Controls The Remodeling Of The Pancreas And The Liver, Part B

Project description:Thyroid hormone (TH) controls the remodeling of the pancreas and the liver. TH-induces dedifferentiation of the exocrine pancreas to a progenitor state (Proc. Nat. Acad Sci. 105, 8962-8967 (2008)) and it remodels the endocrine pancreas (Dev. Biol. 328, 384-391 (2009)). The redifferentiated frog pancreas resembles closely the pancreas of other typical vertebrates. Two pancreas arrays were carried out. The first one studied gene expression changes at different developmental stages of Xenopus laevis during metamorphosis. The second array studies gene expression changes at varying times after the addition of TH to premetamorphic tadpoles. Keywords: co-expression design,development or differentiation design,reference design,time series design Overall design: Thyroid hormone (TH) controls remodeling of the liver. The microarray was carried out to identify changes in gene expression at different stages of development during metamorphosis. This is part 2, done on the 22K Xenopus platform version 1. This dataset was from livers of Xenopus tadpoles (NF52, NF62, and NF66). Each was made in triplicate. Samples in all 3 parts of the study received the same thyroid hormone levels.

2010-05-16 | E-GEOD-16017 | biostudies-arrayexpress

Thyroid Hormone (TH) Controls The Remodeling Of The Pancreas And The Liver, Part A

Project description:Thyroid hormone (TH) controls the remodeling of the pancreas and the liver. TH-induces dedifferentiation of the exocrine pancreas to a progenitor state (Proc. Nat. Acad Sci. 105, 8962-8967 (2008)) and it remodels the endocrine pancreas (Dev. Biol. 328, 384-391 (2009)). The redifferentiated frog pancreas resembles closely the pancreas of other typical vertebrates. Two pancreas arrays were carried out. The first one studied gene expression changes at different developmental stages of Xenopus laevis during metamorphosis. The second array studies gene expression changes at varying times after the addition of TH to premetamorphic tadpoles. Keywords: cell cycle design,co-expression design,reference design,time series design Thyroid hormone (TH) controls remodeling of the pancreas. The micro array was carried out to identify changes in gene expression between the tadpole and frog pancreas. This is part 1, done on the 44K Xenopus platform. This dataset was used only for one pancreas experiment with several data points (control, 12h, 24h, 48h and frog). Each was made in triplicate. Samples in all 3 parts of the study received the same thyroid hormone levels.

2010-05-16 | E-GEOD-16074 | biostudies-arrayexpress

Thyroid hormone induced changes in Xenopus laevis tadpole brain

Project description:Premetamorphic Xenopus laevis tadpoles brain ventricle cells respond to thyroid hormone by proliferation and subsequent differentiation. The goal of this experiment is to identify the genes involved in the TH-induced proliferation pathway in tadpole brain and compare it to TH-induced proliferation and differentiation program in tadpole limb. Xenopus tadpoles (NF54) were treated with 1 mM methimazole in 0.1 X MMR solution for 1 week to block the endogenous TH production and reduce the TH present in the system of the tadpole. They were then treated with 100 nM T3 in 1 mM methimazole and 0.1 x MMR for another 24h and 48h or without T3 for 48h (control group). Brains from the tadpoles were dissected at the end of the experiment. Keywords: development or differentiation design,organism part comparison design,reference design,replicate design,time series design

2005-10-04 | GSE3402 | GEO

Thyroid hormone induced resorption of tail in Xenopus laevis tadpole

Project description:Premetamorphic Xenopus laevis tadpole tail respond to thyroid hormone by resorption. The goal of this experiment is to identify the genes involved in the TH-induced resorption tadpole tail and compare it to TH-induced proliferation and differentiation program in tadpole limb and brain. Xenopus tadpoles (NF54) were treated with 100 nM T3 in 0.1 x MMR for another 24h and 48h or without T3 for 48h (control group). NF 61 tadpoles were in 0.1 X MMR till they reached NF stage 62. The tails were dissected after the experiment. Keywords: development or differentiation design,organism part comparison design,reference design,replicate design,time series design

2005-10-04 | GSE3405 | GEO

Thyroid hormone induced changes in Xenopus laevis tadpole limb bud

Project description:Premetamorphic Xenopus laevis tadpoles limb bud cells respond to thyroid hormone by proliferation and subsequent differentiation. The goal of this experiment is to identify the genes involved in the TH-induced proliferation pathway in developing tadpole limb bud and compare it to TH-induced proliferation and differentiation program in tadpole brain. Xenopus tadpoles (NF54) were treated with 1 mM methimazole in 0.1 X MMR solution for 1 week to block the endogenous TH production and reduce the TH present in the system of the tadpole. They were then treated with 100 nM T3 in 1 mM methimazole and 0.1 x MMR for another 24h and 48h or without T3 for 48h (control group). Limb buds were dissected at the end of the experiment. Keywords: development or differentiation design,organism part comparison design,reference design,replicate design,time series design

2005-10-04 | GSE3404 | GEO

Transcription profiling of brains, hindlimbs and tails of Xenopus laevis tadpoles after treatment with thyroid hormone

Project description:Premetamorphic Xenopus laevis tadpole tail respond to thyroid hormone by resorption. The goal of this experiment is to identify the genes involved in the TH-induced resorption tadpole tail and compare it to TH-induced proliferation and differentiation program in tadpole limb and brain. Xenopus tadpoles (NF54) were treated with 100 nM T3(triioodthyronine) in 0.1 x MMR for another 24h and 48h or without T3 for 48h (control group). NF 61 tadpoles were in 0.1 X MMR till they reached NF stage 62. The tails were dissected after the experiment.

2006-11-08 | E-MNIA-94 | biostudies-arrayexpress

Impact of exposure to environmentally-relevant concentrations of ionic silver and nanosilver on thyroid hormone-dependent postembryonic development of the North American bullfrog (Rana catesbeiana)

Project description:Nanoparticles (<100 nm) are engineered to have unique physico-chemical properties compared to their larger counterparts. Nanosilver (nAg) is the most prevalent nanoparticle in consumer products due to its strong antimicrobial action. While nAg toxicity at high concentrations has been well described, the potential for sublethal effects at or below regulatory guidelines is relatively unknown. Amphibian metamorphosis is mediated by thyroid hormone (TH) and can be precociously induced by the addition of exogenous hormone. Low concentrations of nAg have been shown to disrupt TH-dependent responses in cultured premetamorphic Rana catesbeiana tadpole tail fin. The present study examined the effects of exposure to an environmentally relevant concentration (6 µg/L) of either nAg or ionic silver (iAg) on premetamorphic tadpoles in the absence and presence of exogenous TH. Disruption of thyroid hormone-mediated signalling in brain and liver transcriptomes was evaluated using the MAGEX cDNA microarray.

2017-03-31 | GSE56523 | GEO

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