Results 101 to 110 of about 15,789 (195)

Heart regeneration in adult Xenopus tropicalis after apical resection

Cell & Bioscience, 2017
Background Myocardium regeneration in adult mammals is very limited, but has enormous therapeutic potentials. However, we are far from complete understanding the cellular and molecular mechanisms by which heart tissue can regenerate.
Souqi Liao, Wenyan Dong, Luocheng Lv, Hongyan Guo, Jifeng Yang, Hui Zhao, Ruijin Huang, Ziqiang Yuan, Yilin Chen, Shanshan Feng, Xin Zheng, Junqi Huang, Weihuan Huang, Xufeng Qi, Dongqing Cai   +14 more
doaj   +1 more source

The genomic environment around the Aromatase gene: evolutionary insights [PDF]

, 2005
Background The cytochrome P450 aromatase (CYP19), catalyses the aromatisation of androgens to estrogens, a key mechanism in vertebrate reproductive physiology. A current evolutionary hypothesis suggests that CYP19 gene arose at the origin of vertebrates,
Reis-Henriques Maria A, Santos Miguel M, Castro L Filipe C   +2 more
core   +2 more sources

Escaping Constraints to Innovate: Maternal Neofunctionalization in a HoxB4 Duplicate

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 346, Issue 2, Page 141-151, March 2026.
Whole‐genome duplication in Xenopus laevis generated duplicated Hox genes that are largely constrained in sequence and developmental expression. However, HoxB4L uniquely acquired maternal expression through cis‐regulatory and protein structural divergence, illustrating how gene duplication enables transcription factors to escape pleiotropic constraints
Júlia de Lima Carvalho, José Caetano Silva‐Filho, Janaina Lima de Oliveira   +2 more
wiley   +1 more source

Molecular Characterization of Thyroid Hormone Receptors (TRs) and their Responsiveness to T3 in Microhyla fissipes [PDF]

, 2018
To explore and enrich the molecular mechanisms of thyroid hormone receptors (TRs) in the metamorphosis of amphibians, the cDNA sequences of TR alpha and TR beta in Microhyla fissipes were cloned and characterized.
Jiang, Jianping, Liu, Lusha, Wang, Xungang, Zhang, Mengjie   +3 more
core   +1 more source

Introns as Protective Buffers Against Transposable Elements Invasion During Genome Gigantism in a Newt

Genes to Cells, Volume 31, Issue 2, March 2026.
In the giant Pleurodeles waltl genome, introns serve as “structural buffers,” absorbing transposable elements (TEs) to protect coding exons. While this enables “gene body inflation,” persistent TE accumulation eventually leads to transcriptional silencing and functional collapse, or “burst,” of the gene architecture.
Kazuto Bou, Kiyokazu Agata
wiley   +1 more source

Pinopsin Regulates Melatonin Production and Daily Locomotor Activity: Functional Insights From Gene‐Edited Xenopus Tadpoles

Journal of Pineal Research, Volume 78, Issue 2, March 2026.
ABSTRACT Circadian rhythm alignment depends on environmental light detection via opsins. Pinopsin, originally identified in the pineal organ of birds and later in amphibian pineal complex and eyes, may play a role in this process, though its function has not been genetically tested.
Neda Heshami, Ricardo D. Romero, Flavio S. J. de Souza, Gabriel E. Bertolesi, Sarah McFarlane   +4 more
wiley   +1 more source

Xenopus tropicalis Agote

Xenopus tropicalis (Gray, 1864) (Fig. 12C) MATERIAL EXAMINED. — Togo • 4 ♀; Agoté; MNHN-RA-2006.2172-2175. DESCRIPTION. — Medium to large frog (SVL 40-56 mm ♀), with flattened body. Snout rounded. Head very small, wider than long (HW 26-29% SVL; HL 21-26% SVL). Very small eyes and eyelids (EL 1.4-1.6 mm diameter); a very small subocular tentacle, about
Segniagbeto, Gabriel Hoinsoudé, Ohler, Annemarie, Rödel, Mark-Oliver, Luiselli, Luca, Dubois, Alain   +4 more
openaire   +1 more source

Xenopus fraseri: Mr. Fraser, where did your frog come from? [PDF]

, 2019
A comprehensive, accurate, and revisable alpha taxonomy is crucial for biodiversity studies, but is challenging when data from reference specimens are difficult to collect or observe.
Blackburn, D., Cauret, C., Evans, B., Furman, B., Gansauge, M., Greenbaum, E., Gvoždík, V., Meyer, M., Ofori-Boateng, C., Stanley, E., Streicher, J., Tinsley, R.   +11 more
core   +1 more source

A Short Report on Melanocyte/Melanoma Culture, Senescence, and Reproducibility

Pigment Cell &Melanoma Research, Volume 39, Issue 2, March 2026.
Culture phenotype is determined by the balance between variable physiology and implemented stability measures, ensuring robust and reproducible pigmentation, proliferation, metabolism, and differentiation data. ABSTRACT At the 2025 ESPCR (European Society for Pigment Cell Research) meeting in Erlangen, a workshop on “Pigment Cell Models: Sensitivity ...
Lionel Larue, ESPCR Working Group, Duarte C. Barral, Veronique Delmas, Sara Egea‐Rodriguez, Daniel Aldea, Heather C. Etchevers, Marie‐Dominique Galibert, Robert N. Kelsh, Luisa Lanfrancone, Michele Madigan, Pedro Moura‐Alves, Richard M. White, Anja Bosserhoff   +13 more
wiley   +1 more source

Exploring nervous system transcriptomes during embryogenesis and metamorphosis in Xenopus tropicalis using EST analysis

BMC Genomics, 2007
Background The western African clawed frog Xenopus tropicalis is an anuran amphibian species now used as model in vertebrate comparative genomics. It provides the same advantages as Xenopus laevis but is diploid and has a smaller genome of 1.7 Gbp ...
Wegnez Maurice, Perron Muriel, Demeneix Barbara A, Coen Laurent, Thuret Raphaël, Fierro Ana C, Gyapay Gabor, Weissenbach Jean, Wincker Patrick, Mazabraud André, Pollet Nicolas   +10 more
doaj   +1 more source