Results 41 to 50 of about 7,945 (184)

EST analysis of gene expression in early cleavage-stage sea urchin embryos [PDF]

, 1999
A set of 956 expressed sequence tags derived from 7-hour (mid-cleavage) sea urchin embryos was analyzed to assess biosynthetic functions and to illuminate the structure of the message population at this stage.
Britten, Roy J., Cameron, R. Andrew, Davidson, Eric H., Graham, Geoffrey, Hood, Leroy, Huang, Guyang Matthew, Lee, Youn-Ho   +6 more
core  

Characteristics of the Utilization of Nucleosides by Embryos of Paracentrotus lividus

Journal of Biological Chemistry, 1962
Embryos-Gametes were obtained from the gonads of sea urchins (P. lividus) collected from the area of the bay of Naples from March to July. The eggs were suspended and washed in filtered sea water. Fertilization was performed by stirring with a small amount of sperm on a glass rod at 20-22”. Fertilized eggs were allowed to develop at 18” in filtered sea
openaire   +2 more sources

Unravelling echinoid mass mortalities: a global overview of mechanisms, spatio‐temporal trends, and taxonomic insights

Biological Reviews, Volume 101, Issue 1, Page 221-236, February 2026.
ABSTRACT Mass mortality events (MMEs) have been occurring since the dawn of time. However, in contrast to terrestrial events, most marine MMEs remain undetected, largely due to the inaccessibility of many marine environments. One of the most notorious and best‐studied marine MMEs in modern times is that of the population collapse of the echinoid ...
Lisa‐Maria Schmidt, Guillermo Anderson Benaim, Omri Bronstein   +2 more
wiley   +1 more source

Spermiotoxicity and Embryotoxicity of Permethrin in the Sea Urchin Paracentrotus lividus

Bulletin of Environmental Contamination and Toxicology, 2015
The toxicity of permethrin on the fertilization and early development of sea urchin Paracentrotus lividus embryos were studied. Spermiotoxicity was evaluated on the basis of fertilization rate. Embryotoxicity was determined by comparing the frequency of normal development and malformations in embryos exposed to permethrin throughout their development ...
openaire   +2 more sources

Pigment‐Macromolecule Complexes Isolation from Sea Urchin Biomineral Waste for Coloring Materials

Chemistry–Methods, Volume 6, Issue 1, January 2026.
A methodology has been developed to extract the colored organic fraction occluded within seashell biomineral waste. Applied to sea urchin skeletons, free polyhydroxylated naphthoquinone (PHNQ) pigments and PHNQ‐macromolecule complexes are isolated. These complexes show superior pH stability in purple hues compared to free PHNQ, which shifts from red to
Claudio Ferreira, Vaskar Sardhalia, Alshaba Kakar, Romain Descamps, Lucrèce Matheron, François Ribot, Alexandre Disser, Tony Jouanneau, Elena Vasileva, Natalia Mishchenko, Nadine Nassif, Frédéric Marin, Marie Albéric   +12 more
wiley   +1 more source

Fragments of -thymosin from the sea urchin Paracentrotus lividus as potential antimicrobial peptides against staphylococcal biofilms [PDF]

, 2012
The immune mediators in echinoderms can be a potential source of novel antimicrobial peptides (AMPs) applied toward controlling pathogenic staphylococcal biofilms that are intrinsically resistant to conventional antibiotics. The peptide fraction
Arizza, V., Cusimano, M., Schillaci, D., Vitale, M.   +3 more
core   +1 more source

Skeletogenic Expression of Integrin Alpha, Talin and Npnt Genes and Npnt Role in Sea Urchin Skeletogenesis

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 346, Issue 1, Page 7-19, January 2026.
Three integrin alpha genes and the cytoskeletal adaptor talin are enriched in sea urchin skeletogenic cells during early skeletogenesis. The extracellular matrix protein nephronectin (Npnt) is expressed in the skeletogenic cells throughout skeletogenesis and supports normal skeletal growth, highlighting a potential role for cell–matrix interactions in ...
Shanduo Chen, Tsvia Gildor, Prashant Tewari, Smadar Ben‐Tabou de‐Leon   +3 more
wiley   +1 more source

Ocean acidification increases copper toxicity differentially in two key marine invertebrates with distinct acid-base responses. [PDF]

, 2016
Published onlineJournal ArticleOcean acidification (OA) is expected to indirectly impact biota living in contaminated coastal environments by altering the bioavailability and potentially toxicity of many pH-sensitive metals.
Elliot, K, Ellis, RP, Lewis, C, Newbatt, S, Vernon, E, Wilson, RW   +5 more
core   +1 more source

Recurring cryptic mass mortalities—Lessons from bioturbating echinoids under combined climatic and anthropogenic stress

Limnology and Oceanography, Volume 71, Issue 1, January 2026.
Abstract Marine mass mortality events (MMEs) are a growing source of concern globally. Affecting diverse marine ecosystems, they frequently cause significant ecological disruptions, often leading to large‐scale ecological shifts. However, in contrast to terrestrial MMEs, most marine mortalities likely occur undetected, particularly in cryptic and ...
Lisa‐Maria Schmidt, Guillermo Anderson, Shahar Malamud, Andreas Kroh, Omri Bronstein   +4 more
wiley   +1 more source

Cold Shock Compromises the Electrically Mediated Block to Polyspermy in Lytechinus variegatus Eggs

Molecular Reproduction and Development, Volume 93, Issue 1, January 2026.
ABSTRACT Exposure to low temperature prior to insemination increases the likelihood of polyspermy in Lytechinus variegatus eggs. Electrophysiological recordings reveal that cold shock partially disrupts the egg's action potential, producing a subthreshold depolarization during the fertilization response.
Pedro I. Ivonnet, Lukas Chambers, Lisa Künzi, Gabriel Garcia   +3 more
wiley   +1 more source