Abstract：
:To investigate the mechanisms whereby annular gap junctions in the papillary cells of the enamel organ are degraded intracellularly, continuously growing rat incisors were examined by electron microscopy of routine thin sections as well as for the cytochemical localization of inorganic trimetaphosphatase activity. Routine thin-section analysis revealed small flat or undulated gap junctions, hemi-annular gap junctions between an invaginated cell process and a cell body, and fully internalized cytoplasmic annular gap junctions. Both hemi-annular and annular gap junctions usually contain various organelles and/or inclusions, such as mitochondria, endoplasmic reticulum, ribosomes, vesicles, and lysosomes in the cytoplasm confined by the junctional membranes. Annular gap junctions are sometimes fused with vesicular or tubulovesicular structures. Cytochemistry of inorganic trimetaphosphatase activity revealed an intense enzymatic reaction within a system of tubular structures and round or oval dense bodies. Both structures are believed to correspond to primary lysosomes. A part of the Golgi apparatus also shows a weak reaction. Although hemi-annular gap junctions never show enzymatic reaction, annular gap junctions sometimes contain reaction products throughout their interior cytoplasm and inclusions. Fusion of annular gap-junctional membranes with reaction-positive tubular structures is also observed. In one instance, revealed in serial sections, an annular gap junction was encircled entirely by a reaction-positive structure. These results suggest that cytoplasmic annular gap junctions are formed by endocytosis of hemi-annular gap junctional membranes from the cell surface and then degraded intracellularly by lysosomal enzymes.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Sasaki T,Garant PRdoi
10.1007/BF00215192subject
Has Abstractpub_date
1986-01-01 00:00:00pages
523-30issue
3eissn
0302-766Xissn
1432-0878journal_volume
246pub_type
杂志文章abstract：:The effects of progesterone pretreatment on in vivo 3H-estrogen uptake by five anterior pituitary cell types was analyzed by means of a quantitative autoradiographic-immunocytochemical technique. Male and female rats castrated for 14 days show nuclear concentration of label in all five cell types one h after injection...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00236250
更新日期：1981-01-01 00:00:00
abstract：:We have developed a primary cell culture system of antennal mechanoreceptor neurons from early-stage pupal sphinx moth Manduca sexta. Dissociated neurons from the moth antennae differentiated, grew and survived for several weeks in a conditioned culture medium. Bipolar neurons with soma diameters of 10-25 microns from...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410051358
更新日期：1999-08-01 00:00:00
abstract：:Bone resorption by mononucleated cells was studied in the acellular bone of a teleost fish (Oreochromis niloticus) by histological and enzyme histochemical observations and by transmission electron microscopy. Bone resorbing cells (osteoclasts) were identified by their location at the sites of bone resorption, their f...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050782
更新日期：1997-02-01 00:00:00
abstract：:Four months after the selective ablation of inner hair cells by carboplatin, the interdental cell epithelium exhibited dilated intercellular spaces and cytosolic vacuoles not seen in controls. In addition, the wide, often electron-lucent phalanges observed in the interdental cells of the normal chinchilla collapsed in...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410000253
更新日期：2000-10-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00214559
更新日期：1985-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-012-1349-0
更新日期：2012-04-01 00:00:00
abstract：:The oxyntic mucosa of the mammalian stomach is rich in endocrine cells, such as ECL cells, A-like cells, somatostatin cells, D1/P cells and, in some species, enterochromaffin cells. The various endocrine cell types can be distinguished on the basis of their characteristic cytoplasmic granules and vesicles. The ECL cel...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050707
更新日期：1996-12-01 00:00:00
abstract：:The structure of the two integumental layers comprising the carapace of female D. magna was examined at several points through the molt cycle. The epicuticle and procuticle are simple in organisation; pore canalsare absent but intracuticular fibres are present, forming complexes with invaginations of the epidermal pla...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00214213
更新日期：1976-06-14 00:00:00
abstract：:The immunoreactive CRF-neurons of the rat hypothalamus have been examined immunohistochemically employing anti-rat CRF serum. These neurons are confined to the paraventricular nucleus, dorsomedial-lateral hypothalamic area, and suprachiasmatic nucleus, and are, respectively, also immunoreactive to anti-Met-enk, -alpha...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00216347
更新日期：1985-01-01 00:00:00
abstract：:The spleen of the oriental fire-bellied toad, Bombina orientalis, consists of well-developed white pulp, separated from the lymphocytic marginal zone by the connective tissue boundary layer. Injection of peroxidase-conjugated rabbit anti-peroxidase revealed that these immune complexes were localized on the surface of ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00297553
更新日期：1993-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00237886
更新日期：1980-01-01 00:00:00
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 ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-013-1788-2
更新日期：2014-04-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章,评审
doi：10.1007/s00441-019-03057-z
更新日期：2019-09-01 00:00:00
abstract：:The formation of secretory granules in chronically hypersecretory melanotrophs in the rat pituitary was studied. Hypersecretion was induced by treatment with the dopamine antagonist haloperidol (1.5 mg/kg daily for 7 days), which releases the normal neural dopaminergic inhibition of secretion from the melanotroph. Mor...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00319432
更新日期：1994-02-01 00:00:00
abstract：:The neural circuit that controls the hearts in the leech comprises an ensemble of synaptically interconnected cardiac motor neurons (HE cells) and cardiac interneurons (HN cells). Both the HE cells and the HN cells constitute segmentally homologous sets. We have investigated the structure of these neurons by iontophor...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00235152
更新日期：1981-01-01 00:00:00
abstract：:Immunoreactivity to the polypeptide designated "7B2" recently isolated from human and porcine pituitary glands, appears to be consistently confined to neuroendocrine and endocrine cells in various tissues. In rat gut, immunoreactive 7B2 was found in endocrine-paracrine cells. Highly labeled cells were found in the ant...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00217343
更新日期：1987-09-01 00:00:00
abstract：:The hydrozoan medusa Aglantha digitale (Müller 1776) has eight syncytical giant motor axons, up to 40 micrometers in diameter, running from the margin, up the inside of the bell towards the apex. Giant motor axons injected with Lucifer Yellow CH are connected with lateral neurons running circumferentially across the s...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF01258491
更新日期：1982-01-01 00:00:00
abstract：:Type-A spermatogonia can be found in different locations throughout the germinal epithelium of human seminiferous tubules. Generally they represent the population of germ cells adjacent to the basal lamina, but under special conditions they may be located in the adluminal compartment. This aberrant location is found n...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00216510
更新日期：1984-01-01 00:00:00
abstract：:By means of single and double immuno-enzyme cytochemical staining techniques, it was shown that the external region of the amphibian median eminence contains separate vasotocinergic and mesotocinergic nerve fibres. Moreover, it was demonstrated that the vasotocinergic fibres also contain neurophysin. In animals in whi...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00221117
更新日期：1977-02-02 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410051142
更新日期：1998-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00224374
更新日期：1978-02-24 00:00:00
abstract：:Two types of mammosomatotropes (MS), the small-granule and vesicle-granule MS, were detected in mouse adenohypophysis by electron microscopy and immunohistochemistry. Both cell-types were immunoreactive to prolactin (PRL) and growth hormone (GH) antisera. The small-granule MS contained small, round, solid secretory gr...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00225615
更新日期：1989-06-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050833
更新日期：1997-06-01 00:00:00
abstract：:Polysaccharides in the vacuolar system of an established line of monkey kidney epithelial cells, were investigated by high resolution radioautography following incorporation of 3H-fucose and by the periodic acid-thiosemicarbazide-silver proteinate staining method. Significant amounts of glycogen and glycoproteins were...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00225345
更新日期：1978-10-30 00:00:00
abstract：:Regenerated adrenocortical nodules were obtained by implanting fragments of the capsular tissue of excised adrenal glands into the musculus gracilis of rats (Belloni et al. 1990). Five months after the operation, operated rats showed a normal basal blood level of corticosterone, but a very low concentration of circula...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00318136
更新日期：1991-07-01 00:00:00
abstract：:Exposure to nicotine in smoking contributes to most unexplained male infertility but the mechanisms remain to be fully elucidated. Zinc (Zn) is an essential trace element in normal growth, development and reproduction. Zinc oxide nanoparticles (ZnONPs) are well-known antioxidants. Therefore, this work was designed to ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-018-2909-8
更新日期：2019-02-01 00:00:00
abstract：:Perinatal changes in the appearance of intramembranous particles (IMPs) of microvilli of enterocytes were analyzed quantitatively. In both the jejunum and the ileum, the IMP density on the P-face showed no significant changes from day 17 of gestation to day 5 of postnatal life. It increased between day 5 and day 12, r...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00212224
更新日期：1983-01-01 00:00:00
abstract：:Gravid females of the parasitoid fly species Ormia ochracea (Diptera: Tachinidae) rely on their sense of hearing to detect and localize their hosts, field crickets of the genus Gryllus. As in any hearing insect species, the fly's auditory system consists of a rather complex cascade of mechanical and physiological mech...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410000257
更新日期：2000-09-01 00:00:00
abstract：:Synaptogyrins are conserved components of the exocytic apparatus and function as regulators of Ca(2+)-dependent exocytosis. The synaptogyrin family comprises three isoforms: two neuronal (synaptogyrin-1 and -3) and one ubiquitous (synaptogyrin-2) form. Although the expression patterns of the exocytic proteins synaptot...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-013-1629-3
更新日期：2013-09-01 00:00:00
abstract：:Prolonged secretory stimulation of the exocrine pancreas in the rat by in vivo infusion of caerulein leads to a rapid degranulation of the organ associated with a progressive reduction in the size of the zymogen granules. During the first six to twelve hours of stimulation Golgi complexes are enlarged and several stru...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00224474
更新日期：1976-01-28 00:00:00
