Abstract:
:The electron-dense tracers ferritin, and iron-dextran, and the protein horseradish peroxidase, have been used to investigate the ultrastructural basis of permeability in the upper and lower segments of the Malpighian tubules of Glomeris marginata. All these materials were able to cross the basal lamina and enter the tubule lumen of the upper segment, and it was established that horseradish peroxidase was able to enter the channels which interrupt the apical junctions. In the upper segment, ferritin, iron-dextran, and horseradish peroxidase are taken up and accumulated within intracellular vesicles. In the lower segment ferritin and iron-dextran enter the cells but become generally distributed over the cytoplasm, as well as entering membrane-bounded vacoules. The behaviour of horseradish peroxidase could not be assessed by owing to the presence of endogenous peroxidase activity in the cells. After fixation by direct application of glutaraldehyde to the undissected tubules, the extracellular spaces contained large numbers of membrane-bounded vesicles. The significance of these observations is discussed in relation to the physiological activities of the tubules.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Johnson IT,Riegel JAdoi
10.1007/BF00219837subject
Has Abstractpub_date
1977-09-05 00:00:00pages
549-56issue
4eissn
0302-766Xissn
1432-0878journal_volume
182pub_type
杂志文章abstract::This report describes a phenotyping study of differentiating human skeletal muscle cells in tissue culture. Satellite cells (adult myoblasts), isolated from biopsy material, showed a proliferative behaviour in high-nutrition medium, but fused to form myotubes when grown in low-nutrition medium. The expression and stru...
journal_title:Cell and tissue research
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abstract::Elastic cartilage-derived cells cultured two-dimensionally with FGF2 and corticosteroid produce gel-type masses that become mature cartilage when injected into a subcutaneous pocket. This unique method has previously been clinically applied for treatments of nasal augmentation. However, the components of the gel-type ...
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abstract::During the first postnatal weeks of the developing rodent retina, rhodopsin can be detected in a number of neuron-like cells in the inner retina. In the present study, we aim to characterize the morphology, number and staining characteristics of this peculiar population. Misplaced rhodopsin-positive cells (MRCs) were ...
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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abstract::Neuropeptide F in invertebrates is a homolog of neuropeptide Y in mammals and it is a member of FMRFamide-related peptides. In arthropods, such as insects, there are two types of neuropeptide F comprising long neuropeptide F (NPF) and short neuropeptide F (sNPF). Both NPFs are known to play a crucial role in the regul...
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1987-02-01 00:00:00
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journal_title:Cell and tissue research
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journal_title:Cell and tissue research
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更新日期:1982-01-01 00:00:00
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journal_title:Cell and tissue research
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更新日期:2011-09-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1990-02-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1981-01-01 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
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更新日期:1994-09-01 00:00:00