Spatiotemporal clustering of cell death in the avian forebrain proliferative zone

Charvet, Christine J.; Striedter, Georg F.

doi:10.1387/ijdb.072455cc

Cited by 9 publications

(6 citation statements)

References 49 publications

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“…Nevertheless, these results indicate that immature spermatogonial cysts are responsive to exogenous stimulation only after their in vivo exit from G 0 and entry into the cell cycle, findings which, in broad terms, resemble those reported for mature resting mammalian T lymphocytes [37,38] and frog splenocytes [39] which also only become susceptible to apoptosis once they have exited from G 0 and begun to proliferate. Taken together, these observations in Squalus support, in principle, the notion that the pathways of cell death and the proliferation are coupled [40][41][42][43].…”

Section: Discussionsupporting

confidence: 69%

Fetal bovine serum simultaneously stimulates apoptosis and DNA synthesis in premeiotic stages of spermatogenesis in spiny dogfish (Squalus acanthias) in vitro: modulation by androgen and spermatogenic activity status

McClusky

2008

Apoptosis

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Using the simple cystic spermatogenesis in the shark testis as a model, we previously reported the relative resistance of immature spermatogonia (stem cell and early-stage spermatogonia) to apoptosis in the normal testis and after spermatoxicant exposure in vivo. Apoptosis was monitored by fluorescence image analysis of living cysts, using the validated acridine orange (AO) vital staining technique. Findings show that FBS simultaneously stimulates both apoptosis and [(3)H]thymidine incorporation in immature spermatogonial clones in a concentration-dependent manner in vitro. Furthermore, androgen inhibits apoptosis and increases cyst viability, more so with 10% FBS than with 1% FBS. All the effects were as a function of spermatogenic activity status but were distinct in early-stage spermatogonial cysts isolated from testes awakening from the previous winter spermatogenic arrest period. Results are discussed in the context of the alternating germ-Sertoli cell population kinetics of early-stage spermatogonial cysts in Squalus acanthias's protracted testicular cycle.

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Section: Discussionsupporting

confidence: 69%

Fetal bovine serum simultaneously stimulates apoptosis and DNA synthesis in premeiotic stages of spermatogenesis in spiny dogfish (Squalus acanthias) in vitro: modulation by androgen and spermatogenic activity status

McClusky

2008

Apoptosis

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“…; Navascués et al. ; Charvet & Striedter, ), mouse (Rodríguez‐Gallardo et al. ) and rat (Horsburgh & Sefton, ).…”

Section: Discussionmentioning

confidence: 99%

Chronotopographical distribution patterns of cell death and of lectin‐positive macrophages/microglial cells during the visual system ontogeny of the small‐spotted catshark Scyliorhinus canicula

Bejarano-Escobar

Blasco²,

Durán

et al. 2013

Journal of Anatomy

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The patterns of distribution of TUNEL-positive bodies and of lectin-positive phagocytes were investigated in the developing visual system of the small-spotted catshark Scyliorhinus canicula, from the optic vesicle stage to adulthood. During early stages of development, TUNEL-staining was mainly found in the protruding dorsal part of the optic cup and in the presumptive optic chiasm. Furthermore, TUNEL-positive bodies were also detected during detachment of the embryonic lens. Coinciding with the developmental period during which ganglion cells began to differentiate, an area of programmed cell death occurred in the distal optic stalk and in the retinal pigment epithelium that surrounds the optic nerve head. The topographical distribution of TUNELpositive bodies in the differentiating retina recapitulated the sequence of maturation of the various layers and cell types following a vitreal-to-scleral gradient. Lectin-positive cells apparently entered the retina by the optic nerve head when the retinal layering was almost complete. As development proceeded, these labelled cells migrated parallel to the axon fascicles of the optic fiber layer and then reached more external layers by radial migration. In the mature retina, lectin-positive cells were confined to the optic fiber layer, ganglion cell layer and inner plexiform layer. No evident correlation was found between the chronotopographical pattern of distribution of TUNEL-positive bodies and the pattern of distribution of lectin-labelled macrophages/microglial cells during the shark′s visual system ontogeny.

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“…Indeed, T. guttata is considered to be an exceptional model with which to study adult neurogenesis in the central nervous system (for a review, see Charvet & Striedter, ). Thus, the major period of telencephalic neurogenesis ends approximately 1 week after hatching, although a limited amount of telencephalic neurogenesis is detected in the adult tissue (Dewulf & Bottjer, ; Charvet & Striedter, , ; Striedter & Charvet, ). Moreover, this species also contains undifferentiated progenitor cells that contribute to an overall greater number of neurons in song‐control nuclei (Dewulf & Bottjer, ), even during the juvenile period.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

“…The zebra finch ( Taeniopygia guttata , Vieillot 1817) is well known for its vocal learning abilities. These abilities depend on progenitor cells located in the ventricular zone of the telencephalon that give rise to song‐control neurons that contribute to the construction of brain areas important for song‐learning (Dewulf & Bottjer, ; Charvet & Striedter, , ). Therefore, T. guttata is considered an excellent model with which to study postnatal neurogenesis in the central nervous system.…”

Section: Introductionmentioning

confidence: 99%

Retinal histogenesis in an altricial avian species, the zebra finch (Taeniopygia guttata,Vieillot 1817)

et al. 2018

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Comparative developmental studies have shown that the retina of altricial fish and mammals is incompletely developed at birth, and that, during the first days of life, maturation proceeds rapidly. In contrast, precocial fish and mammals are born with fully differentiated retinas. Concerning birds, knowledge about retinal development is generally restricted to a single order of precocial birds, Galliformes, due to the fact that both the chicken and the Japanese quail are considered model systems. However, comparison of embryonic pre-hatchling retinal development between altricial and precocial birds has been poorly explored. The purpose of this study was to examine the morphogenesis and histogenesis of the retina in the altricial zebra finch (Taeniopygia guttata, Vieillot 1817) and compare the results with those from previous studies in the precocial chicken. Several maturational features (morphogenesis of the optic vesicle and optic cup, appearance of the first differentiated neurons, the period in which the non-apical cell divisions are observable, and the emergence of the plexiform layers) were found to occur at later stages in the zebra finch than in the chicken. At hatching, the retina of T. guttata showed the typical cytoarchitecture of the mature tissue, although features of immaturity were still observable, such as a ganglion cell layer containing many thick cells, very thin plexiform layers, and poorly developed photoreceptors. Moreover, abundant mitotic activity was detected in the entire retina, even in the regions where the layering was complete. The circumferential marginal zone was very prominent and showed abundant mitotic activity. The partially undifferentiated stage of maturation at hatching makes the T. guttata retina an appropriate model with which to study avian postnatal retinal neurogenesis.

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Spatiotemporal clustering of cell death in the avian forebrain proliferative zone

Cited by 9 publications

References 49 publications

Fetal bovine serum simultaneously stimulates apoptosis and DNA synthesis in premeiotic stages of spermatogenesis in spiny dogfish (Squalus acanthias) in vitro: modulation by androgen and spermatogenic activity status

Fetal bovine serum simultaneously stimulates apoptosis and DNA synthesis in premeiotic stages of spermatogenesis in spiny dogfish (Squalus acanthias) in vitro: modulation by androgen and spermatogenic activity status

Chronotopographical distribution patterns of cell death and of lectin‐positive macrophages/microglial cells during the visual system ontogeny of the small‐spotted catshark Scyliorhinus canicula

Retinal histogenesis in an altricial avian species, the zebra finch (Taeniopygia guttata,Vieillot 1817)

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