Distribution and dynamics of nematocyte populations in Hydra attenuata
نویسندگان
چکیده
منابع مشابه
Cell cycle kinetics and development of Hydra attenuata. III. Nerve and nematocyte differentiation.
The differentiation of nerve cells and nematocytes in Hydra attenuata has been investigated by labelling interstitial cell precursors with PHJthymidine and following by autoradiography the appearance of labelled, newly differentiated cells. Nematocyte differentiation occurs only in the gastric region where labelled nematoblasts appear 12 h and labelled nematocytes 72—96 h after addition of ["Hj...
متن کاملCommitment during nematocyte differentiation in Hydra.
Nematocytes in Hydra differentiate from interstitial stem cells. Desmonemes differentiate mainly in the distal half of the body column while stenoteles differentiate predominantly in the proximal half. This difference was used to determine the timing of nematocyte-type commitment in the differentiation pathway. Cells were transferred from distal or proximal regions to all positions in the body ...
متن کاملStem cell growth and differentiation in Hydra attenuata. II. Regulation of nerve and nematocyte differentiation in multiclone aggregates.
The differentiation of nerve cells and nematocytes from interstitial stem cells in Hydra has been investigated under conditions of changing stem cell density. Interstitial stem cells were cultured in a feeder layer system consisting of aggregates of nitrogen mustard-inactivated tissue. The aggregates were seeded with varying numbers of stem cells from 10 to 400 per aggregate; between 4 and 7 da...
متن کاملRegulation of interstitial cell differentiation in Hydra attenuata. V. Inability of regenerating head to support nematocyte differentiation.
Nematocyte differentiation was examined during head regeneration in Hydra attenuata. Nematocyte precursors were found to decrease in head-regenerating tissue. This decrease could not be attributed to decreased stem cell commitment or to altered cellular kinetics. The nematocyte precursors could be 'rescued' by regrafting a head onto the initially regenerating tissue only prior to the time at wh...
متن کاملOrganophosphate nerve agent toxicity in Hydra attenuata.
The toxicity for analogues of sarin (GB), soman (GD), and VX was evaluated using Hydra attenuata as a model organism. The organophosphate nerve agent analogue simulants used in this investigation included the following: isopropyl p-nitrophenyl methylphosphonate (for GB); pinacolyl p-nitrophenyl methylphosphonate (for GD); and diisopropyl S-(2-diisopropylaminoethyl)phosphorothioate, diethyl S-(2...
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ژورنال
عنوان ژورنال: Journal of Cell Science
سال: 1976
ISSN: 1477-9137,0021-9533
DOI: 10.1242/jcs.21.1.15