✦ LIBER ✦

Presence of thyroid hormones in ascidian larvae and their involvement in metamorphosis

✍ Scribed by Patricolo, Eleonora ;Cammarata, Matteo ;D?Agati, Paolo

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 453 KB
Volume: 290
Category: Article
ISSN: 0022-104X
DOI: 10.1002/jez.1084

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

In this study we investigated the presence and localization of thyroxine in Ciona intestinalis larvae and its involvement in metamorphosis. To date, the mechanisms regulating the metamorphosis of ascidians remain largely unknown. In vivo treatment of swimming larvae with exogenous L‐thyroxine and thiourea, and in vitro experiments utilizing high performance liquid chromatography, radioimmunoassay, and immunoperoxidase staining demonstrate the presence of thyroxine at the larval stage. This suggests that this hormone may participate in the control of metamorphosis and thus play a different role from that observed in adults. J. Exp. Zool. 290:426–430, 2001. © 2001 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

Interdependence of corticosterone and th

Interdependence of corticosterone and thyroid hormones in toad larvae (Bufo boreas). II. Regulation of corticosterone and thyroid hormones

✍ Hayes, Tyrone B. ;Wu, Tzu Hao 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 937 KB

## Abstract Typically, the role of corticosterone (B) in metamorphosis is considered secondary to that of thyroid hormone, with B having only enhancing effects. In the current study, we demonstrate that the relationship between the thyroid hormones and B is much more complex and that thyroxine (T~4

Regulation of metamorphosis in ascidians

Regulation of metamorphosis in ascidians involves NO/cGMP signaling and HSP90

✍ Bishop, Cory D. ;Bates, William R. ;Brandhorst, Bruce P. 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 369 KB

## Abstract Treatment of larvae of the ascidians __Boltenia villosa__ (Family: Pyuridae) and __Cnemidocarpa finmarkiensis__ (Family: Styelidae) with drugs that inhibit the function of the molecular chaperone HSP90 increased the frequency of tail resorption, the primary morphogenetic event of metamo

Photorefractoriness in European starling

Photorefractoriness in European starlings: Associated hypothalamic changes and the involvement of thyroid hormones and prolactin

✍ Nicholls, T. J. ;Goldsmith, A. R. ;Dawson, A. 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 512 KB

Responsivity to photostimulation in previously photorefractory European starlings is caused by subjection to short daylengths and is characterized by a marked activation of the hypothalamus in terms of synthesis of gonadotropin releasing hormone. This active hypothalamic state is amplified for a tim

Changes in intestinal and hepatic thyroi

Changes in intestinal and hepatic thyroid hormone deiodination during spontaneous metamorphosis of the sea lamprey,Petromyzon marinus

✍ Eales, J. Geoffrey; McLeese, Jennifer M.; Holmes, John A.; Youson, John H. 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 126 KB 👁 1 views

We measured microsomal low-K m outer-ring deiodination (ORD) and inner-ring deiodination (IRD) activities for thyroxine (T 4 ) and 3,5,3′-triiodothyronine (T 3 ) in intestine and liver in nonmetamorphosing (undersized) larvae, immediately premetamorphic larvae, animals in stages 1-7 of metamorphosis

Xanthohumol, a prenylated chalcone from

Xanthohumol, a prenylated chalcone from hops, modulates hepatic expression of genes involved in thyroid hormone distribution and metabolism

✍ Branislav Radović; Ragna Hussong; Clarissa Gerhäuser; Walter Meinl; Norbert Fran 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 354 KB

## Abstract In the present study, we analyzed the influence of xanthohumol (XN) on thyroid hormone (TH) distribution and metabolism in rats. A potent and selective competition of XN for thyroxine (T4) binding to transthyretin (IC~50~=1 μM at 1.7 nM [^125^I]T4) was found in human and rat sera __in v