Results 41 to 50 of about 5,285 (203)

Extraocular Photoreception in Optic Lobes, Suckers, and Skin of Octopus vulgaris

Integrative Zoology, EarlyView.
Evidence of extra‐ocular photoreception in Octopus vulgaris (a) Diagram of the O. vulgaris different tissues considered: SPB, sucker proximal big; SPL, sucker proximal large; SM, sucker medium; SD, sucker distal; SK, skin; OL, optic lobes; RT, retina; (b‐d) Gene expression analysis of Ov‐GRK1 (red), Ov‐retinochrome (green), Ov‐rhodopsin (blue) mRNA ...
Valeria Maselli, Al‐Sayed Al‐Soudy, Mariangela Norcia, Stefania Galdiero, Sara Palladino, Emanuela Cirillo, Gianluca Polese, Anna Di Cosmo   +7 more
wiley   +1 more source

3D model of amphioxus steroid receptor complexed with estradiol [PDF]

, 2009
The origins of signaling by vertebrate steroids are not fully understood. An important advance was the report that an estrogen-binding steroid receptor [SR] is present in amphioxus, a basal chordate with a similar body plan as vertebrates.
Michael E. Baker, David J. Chang
core  

Ancestral vascular lumen formation via basal cell surfaces. [PDF]

PLoS ONE, 2009
The cardiovascular system of bilaterians developed from a common ancestor. However, no endothelial cells exist in invertebrates demonstrating that primitive cardiovascular tubes do not require this vertebrate-specific cell type in order to form.
Tomás Kucera, Boris Strilić, Kathrin Regener, Michael Schubert, Vincent Laudet, Eckhard Lammert   +5 more
doaj   +1 more source

Amphioxus and the evolution of head segmentation [PDF]

Integrative and Comparative Biology, 2008
Whether or not the vertebrate head is fundamentally segmented has been controversial for over 150 years. Beginning in the late 19th century, segmentalist theories proposed that the vertebrate head evolved from an amphioxus-like ancestor in which mesodermal somites extended the full length of the body with remnants of segmentation persisting as the ...
Linda Z, Holland, Nicholas D, Holland, Edwin, Gilland   +2 more
openaire   +2 more sources

Characterization of dermatan sulfate and chondroitin sulfate profiles during brain regeneration in Styela plicata

The FEBS Journal, EarlyView.
Adult ascidians are capable of regenerating their entire brains following injury, and glycosaminoglycans have been shown to either promote or inhibit neuritogenesis. In this study, dermatan 2,6‐disulfate (D2,6S) was identified as the predominant complex carbohydrate in the ascidian brain.
Taynan Motta Portal, Samara de Oliveira Pimentel, Bruno da Costa Rodrigues, Mauro Sérgio Gonçalves Pavão, Rodrigo Nunes da Fonseca, Cintia Monteiro de Barros   +5 more
wiley   +1 more source

Motif analysis of amphioxus, lamprey and invertebrate estrogen receptors and amphioxus and human estrogen-related receptors: Towards a better understanding of estrogen receptor evolution [PDF]

, 2008
*Background.* The origins of steroid-dependent regulation of the vertebrate estrogen receptor (ER) are poorly understood. Genes with statistically significant sequence similarity to vertebrate ERs have been found in lamprey, a basal vertebrate, and ...
Michael E. Baker, Charlie Chandsawangbhuwana   +1 more
core  

Expression of corticoid‐regulatory genes in the gills of Atlantic salmon (Salmo salar) parr and smolt and during salinity acclimation

Journal of Fish Biology, EarlyView.
Abstract In teleost fishes, cortisol is the major corticoid and has both glucocorticoid and mineralocorticoid actions. However, how fish tissues discriminate between these distinct corticosteroid actions is unclear. In mammals, the major factors responsible for intracellular corticosteroid regulation are glucocorticoid receptors (grs) and the ...
Makoto Kusakabe, Takashi Yada, Graham Young, Amy M. Regish, Stephen D. McCormick   +4 more
wiley   +1 more source

Molecular insights into electroreceptor ribbon synapses from differential gene expression in sturgeon lateral line organs

Journal of Anatomy, Volume 248, Issue 5, Page 784-805, May 2026.
The expression of various genes involved in synapse development, stability and/or function was studied in developing mechanosensory neuromasts and electrosensory ampullary organs in sterlet sturgeon. Most were shared, including Slc17a8, Slc1a3 and Nrxn3, but Cbln18 was neuromast‐restricted and Tulp1 was ampullary organ‐restricted.
Alexander S. Campbell, Martin Minařík, David Buckley, Tanmay Anand, David Gela, Martin Pšenička, Clare V. H. Baker   +6 more
wiley   +1 more source

Origin and diversification of steroids: Co-evolution of enzymes and nuclear receptors [PDF]

, 2010
Recent sequencing of amphioxus and sea urchin genomes has provided important data for understanding the origins of enzymes that synthesize adrenal and sex steroids and the receptors that mediate physiological response to these vertebrate steroids ...
Michael E. Baker
core  

Molecular asymmetry in the cephalochordate embryo revealed by single-blastomere transcriptome profiling.

PLoS Genetics, 2020
Studies in various animals have shown that asymmetrically localized maternal transcripts play important roles in axial patterning and cell fate specification in early embryos.
Che-Yi Lin, Mei-Yeh Jade Lu, Jia-Xing Yue, Kun-Lung Li, Yann Le Pétillon, Luok Wen Yong, Yi-Hua Chen, Fu-Yu Tsai, Yu-Feng Lyu, Cheng-Yi Chen, Sheng-Ping L Hwang, Yi-Hsien Su, Jr-Kai Yu   +12 more
doaj   +1 more source