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1,308 results
  • Mother-to-embryo vitellogenin transport in a viviparous teleost Xenotoca eiseni. [Journal Article]
    Proc Natl Acad Sci U S A 2019Iida A, Arai HN, … Sano K
  • Vitellogenin (Vtg), a yolk nutrient protein that is synthesized in the livers of female animals, and subsequently carried into the ovary, contributes to vitellogenesis in oviparous animals. Thus, Vtg levels are elevated during oogenesis. In contrast, Vtg proteins have been genetically lost in viviparous mammals, thus the yolk protein is not involved in their oogenesis and embryonic development. I…
  • Gene Silencing in Chicken Brain Development. [Journal Article]
    Methods Mol Biol 2020; 2047:439-456Tsapara G, Andermatt I, Stoeckli ET
  • Despite the development of brain organoids and neural cultures derived from iPSCs (induced pluripotent stem cells), brain development can only be studied in an animal. The mouse is the most commonly used vertebrate model for the analysis of gene function because of the well-established genetic tools that are available for loss-of-function studies. However, studies of gene function during developm…
  • Vitellogenins - Yolk Gene Function and Regulation in Caenorhabditis elegans. [Review]
    Front Physiol 2019; 10:1067Perez MF, Lehner B
  • Vitellogenins are a family of yolk proteins that are by far the most abundant among oviparous animals. In the model nematode Caenorhabditis elegans, the 6 vitellogenins are among the most highly expressed genes in the adult hermaphrodite intestine, which produces copious yolk to provision eggs. In this article we review what is known about the vitellogenin genes and proteins in C. elegans, in com…
  • Enlarged Egg Size Increases Offspring Fitness of a Frog Species on the Zhoushan Archipelago of China. [Journal Article]
    Sci Rep 2019; 9(1):11653Xu F, Yang W, Li Y
  • Egg size represents maternal investment and is an important life-history trait. It also is assumed to have an effect on offspring fitness. Life-history theory predicts that oviparous animals on islands will produce enlarged eggs because of increased maternal investment to improve offspring performance to facilitate intra-specific competition. The life-history theory, developed during the 1950s, p…
  • The Embryos of Turtles Can Influence Their Own Sexual Destinies. [Journal Article]
    Curr Biol 2019; 29(16):2597-2603.e4Ye YZ, Ma L, … Du WG
  • Sessile organisms with thermally sensitive developmental trajectories are at high risk from climate change. For example, oviparous reptiles with temperature-dependent sex determination (TSD) may experience strong (potentially disastrous) shifts in offspring sex ratio if reproducing females are unable to predict incubation conditions at the time of oviposition. How then have TSD reptile taxa persi…
  • Bird embryos perceive vibratory cues of predation risk from clutch mates. [Journal Article]
    Nat Ecol Evol 2019; 3(8):1225-1232Noguera JC, Velando A
  • During development in fluctuating environments, phenotypes can be adjusted to the conditions that individuals will probably encounter later in life. As developing embryos have a limited capacity to fully capture environmental information, theory predicts that they should integrate relevant information from all reliable sources, including the social environment. In many oviparous species, embryos …
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