Spatiotemporal distribution patterns of oligosaccharides during early embryogenesis in the starfish Patiria pectinifera

Doihara, Takuya; Miguchi, Yuji; Miyawaki, Kyojy; Shimokawa, Tetsuya; Hamada, Fumihiko; Kobayashi, Naoto; Matsuda, Seiji

doi:10.1007/s00427-009-0280-1

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…The underlying molecular mechanisms and its control by signaling pathways is currently not known. Extracellular matrix proteins assembled as basement membranes play a fundamental role in morphogenesis and organogenesis (Ekblom et al, 1985; Doihara et al, 2009; Mitsunaga-Nagatsubo et al, 2009; Tsang et al, 2010). Hemocytes are known to produce and secrete proteins used for stabilizing basement membranes around other tissues.…”

Section: Discussionmentioning

confidence: 99%

Hematopoiesis at the onset of metamorphosis: terminal differentiation and dissociation of the Drosophila lymph gland

2011

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The D. melanogaster hematopoietic organ, called lymph gland, proliferates and differentiates throughout the larval period. The lymph gland of the late larva is comprised of a large primary lobe and several smaller secondary lobes. Differentiation into two types of hemocytes, plasmatocytes and crystal cells, is confined to the outer layer (cortical zone) of the primary lobe; the center of the primary lobe (medullary zone), as well as the secondary lobes, contain only proliferating prohemocytes. A small cluster of prohemocytes located at the posterior tip of the primary lobe serves as a signaling center (PSC) that inhibits precocious differentiation of the medullary zone. The larval lymph gland is stabilized by layers of extracellular matrix (basement membranes) that surround individual hemocytes, groups of hemocytes, as well as the lymph gland as a whole. In this paper we investigated the events shaping the lymph gland in the early pupa. The lymph gland dissociates and hemocytes disperse during the first 12h after puparium formation (APF), leaving behind empty husks of basement membrane. Prior to lymph gland dissociation, cells of the medullary zone differentiate, expressing the early differentiation marker Peroxidasin, as well as, in part, the late differentiation marker P1. Cells of the PSC spread out throughout the pupal lymph gland prior to their dispersal. Cells of the secondary lobes undergo a rapid phase of proliferation that lasts until 8h APF, followed by expression of Peroxidasin, and dispersal. These hemocytes do not express P1, indicating that they disperse prior to full maturation.

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Section: Discussionmentioning

confidence: 99%

Hematopoiesis at the onset of metamorphosis: terminal differentiation and dissociation of the Drosophila lymph gland

2011

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Morphological Maturation Level of the Esophagus Is Associated With the Number of Circumesophageal Muscle Fibers During Archenteron Formation in the Starfish Patiria (Asterina) pectinifera

Miguchi

Takata²,

Doihara³

et al. 2010

The Biological Bulletin

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In echinoderms, the circumesophageal muscle is mesodermal in origin. Several studies of sea urchins have reported that the molecular events of myogenesis occur during the differentiation of the circumesophageal muscle in early embryogenesis. In contrast, few detailed reports have examined the differentiation of the circumesophageal muscle in larval starfish. Here, we examined the temporal-numeric distribution and differentiation of esophagus circular muscle fibers in the starfish Patiria pectinifera by using rhodamine-phalloidin staining. Muscle fibers were not detected in mouth-forming larvae, but a mean of about 10 muscle fibers was observed in 48-h larvae, and about 26 bundles were observed after 60 h. During the next 12 h, the number of muscle fiber bundles increased slightly to about 31 bundles and was stable until 96 h.

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Spatiotemporal distribution patterns of oligosaccharides during early embryogenesis in the starfish Patiria pectinifera

Cited by 2 publications

References 19 publications

Hematopoiesis at the onset of metamorphosis: terminal differentiation and dissociation of the Drosophila lymph gland

Hematopoiesis at the onset of metamorphosis: terminal differentiation and dissociation of the Drosophila lymph gland

Morphological Maturation Level of the Esophagus Is Associated With the Number of Circumesophageal Muscle Fibers During Archenteron Formation in the Starfish Patiria (Asterina) pectinifera

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