What's your position? the Xenopus cement gland as a paradigm of regional specification

Article Abstract:

The developmental aspects of the cement gland of the frog are discussed. The model suggests that the cement gland is induced and positioned, inside the embryo, by the overlap of three domains. Research indicates that the cement gland is formed at intermediate levels of BMP signaling. Furthermore, data indicate that its anterodorsal identity is medited by transcription factor Otx2, whereas ventrolateral identy involves the BMP4 signaling pathway.

United Kingdom, United States, Cellular signal transduction, Xenopus, Glands

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Collective specification of cellular development

Article Abstract:

This article examines cellular development from the perspectives of cellular specialization, the genetic information and differentiation pathways in living systems. Research on cellular development, collective specification, and social organization is discussed in relation to anthill organization and leaf venation. Implications of the findings for ecology and evolution are presented.

Analysis, Adaptation (Physiology), Physiological adaptation, Evolution (Biology), Evolution, Cell differentiation, Cell metabolism, Speciation

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The story of cell fusion: big lessions from little worms

Article Abstract:

This article discusses cell fusion process in metazoans as exemplified by Caenorhabditis elegans. Research findings identify the new factors involved in the developmental cell fusion, their role in the mechanism of the process and regulation leading to intercellular processes and finally organogenesis.

Caenorhabditis elegans, Cell hybridization, Organogenesis

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