Abstract:
:The fine structure of spermatids has been examined in Calliactis, Protanthea, Gonactinia and Parazoanthus (Cnidaria, Anthozoa). The sperm cells are relatively simple and lack distinct acrosomes. Their nuclei, spherical in the zoanthid, in the actinians are slendertipped cones. Condensation of the chromatin is interpreted in terms of progressive coiling of densely-stained filaments and the elimination of nucleoplasm. Nuclear elongation occurs in the absence of microtubules. A well-developed centriolar complex is attached to the nuclear envelope by fibres and in this area (that of a shallow fossa in actinian spern) the nuclear membranes seem to be thickened. The centrioles are surrounded by a mitochondrial collar, especially pronounced in Calliactis. In contact with the mitochondria and nucleus is a ring of lipid-containing vesicles 300-700 nm in diameter. A system of densely-staining vesicles 150-300 nm in size corresponds to the "pro-acrosomal vesicles" described for other coelenterates. They are scattered in the peripheral cytoplasm and are regarded as derivatives of the endoplasmic reticulum. Problems of organelle function and of differentiation during spermiogenesis are discussed.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Lyke EB,Robson EAdoi
10.1007/BF00222065subject
Has Abstractpub_date
1975-01-01 00:00:00pages
185-205issue
2eissn
0302-766Xissn
1432-0878journal_volume
157pub_type
杂志文章abstract::The position, structure and function of the valves within the lateral sinus of the medical leech, Hirudo medicinalis, are described on the basis of vital, light- and electron microscopy. In this species the valvular apparatus consists of multiple elongated fir cone-shaped fibrous villi surrounding the orifices of the ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00399522
更新日期:1976-09-20 00:00:00
abstract::Considerable evidence indicates that the state of ocular connective tissues and their response in glaucomatous disease affect the degree of glaucoma damage. Both experimental and clinical data suggest that improved diagnostic and prognostic information can be derived from the assessment of the mechanical responsivenes...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s00441-013-1603-0
更新日期:2013-08-01 00:00:00
abstract::The smooth muscle of rabbit portal vein was studied by electron microscopy with particular emphasis on the mechanical linkage between the muscle cells and on the distribution of connective tissue. The media of this vein is composed of inner circular and outer longitudinal muscle layers which are orientated almost perp...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00237614
更新日期:1980-01-01 00:00:00
abstract::An antiserum against the octapeptide Pea-CAH-I, a member of the adipokinetic hormone/red pigment-concentrating hormone family, has been produced for immunocytochemical staining in insects and various other invertebrate species. The anti-Pea-CAH-I serum stains the glandular corpora cardiaca cells of those insect specie...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050601
更新日期:1996-06-01 00:00:00
abstract::In Rana temporaria tadpoles, fluorescent fibres appear in the prospective eminentia mediana, the pars intermedia and the pars distalis at Gosner's stage 25. During prometamorphosis the amount of fluorescent material increases around the developing primary capillary plexus in the eminentia mediana. In the pars intermed...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00220236
更新日期:1976-09-01 00:00:00
abstract::Striated rootlets in ciliated cells are conical banded structures composed of longitudinally aligned filaments. The formation of striated rootlets during ciliognesis in the human oviduct epithelium was studied by electron microscopy. Primitive rootlets appeared at the proximal side of basal bodies before or at the sam...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050905
更新日期:1997-10-01 00:00:00
abstract::A culture technique for the in vitro growth and differentiation of antennal cells of Mamestra brassicae is described. The morphology of the growing cells is described. At least five morphological cell types can be distinguished in the cultures. Neuronal cells (type A) were characterized morphologically and immunocytoc...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050884
更新日期:1997-08-01 00:00:00
abstract::Iron loading of hepatocytes was followed through the stages (1-7) of metamorphosis in lamprey (Petromyzon marinus L.) using light- and electron-microscopic histochemistry. Iron is present in ferric and ferrous forms in the hepatocytes of larval lampreys in levels that can only be detected in the electron microscope. D...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00217405
更新日期:1983-01-01 00:00:00
abstract::Antibodies against cartilage proteins are highly prevalent in the sera and synovial fluids of rheumatoid arthritis (RA) patients and also precede disease induction in various spontaneous and induced animal models of arthritis. These antibodies play an important role in the induction and perpetuation of the clinical di...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s00441-009-0816-8
更新日期:2010-01-01 00:00:00
abstract::The saccular membranes of trout (Oncorhynchus mykiss) and turbot (Scophthalmus maximus) were examined to characterize specialized epithelial cells that might be responsible for ion exchange. The approach for localizing cell types was new for this tissue, as observations were made with a stereomicroscope and a light mi...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050851
更新日期:1997-07-01 00:00:00
abstract::In marine cartilaginous fish, reabsorption of filtered urea by the kidney is essential for retaining a large amount of urea in their body. However, the mechanism for urea reabsorption is poorly understood due to the complexity of the kidney. To address this problem, we focused on elephant fish (Callorhinchus milii) fo...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-015-2234-4
更新日期:2015-12-01 00:00:00
abstract::Membrane-coating granules of the epithelium of the hamster cheek pouch displayed a lamellated internal structure consisting of alternating thick and thin electron dense bands separated by translucent bands of equal width. The repeat distance of the contents was 8.5 nm +/- sd. 0.7 nm and the thickness of the major elec...
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::We previously demonstrated that GLUT2, a facilitated-diffusion glucose transporter isoform known to play critical roles in the regulation of systemic blood glucose level, is present at the apical ends of Müller cells in the rat retina. As a means of elucidating the ontogeny and possible role(s) of GLUT2 in the develop...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004419900099
更新日期:1999-11-01 00:00:00
abstract::The desert locust Schistocerca gregaria is a major agricultural pest in North Africa and the Middle East. As such, it has been intensely studied, in particular with respect to population dynamics, sensory processing, feeding behavior flight and locomotor control, migratory behavior, and its neuroendocrine system. Bein...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-018-2844-8
更新日期:2018-10-01 00:00:00
abstract::The functional expression of vascular cell adhesion molecule-1 (VCAM-1), intercellular adhesion molecule-1 (ICAM-1) and MAdCAM-1 in the choroid plexus is indicative of a role of this structure in the communication of the immune system with the central nervous system (CNS). In order to gain further insight into the pos...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410051287
更新日期:1999-05-01 00:00:00
abstract::Distribution of microtubules and other cytoskeletal filaments in growing skeletal muscle cells (myotubes) was studied in vitro by fluorescence microscopy using fluorescin-labeled antibodies and phalloidin, a specific antiactin drug. In the distal elongating tips of myotubes, microtubules were the major cytoskeletal el...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00214368
更新日期:1988-05-01 00:00:00
abstract::Nematocysts are characteristic organelles of the phylum Cnidaria. The free-living Platyhelminth Microstomum lineare preys on Hydra oligactis and sequesters nematocysts. All nematocyst types become phagocytosed without adherent cytoplasm by intestinal cnidophagocytes. Desmoneme and isorhiza nematocysts disappear within...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-019-03149-w
更新日期:2020-01-01 00:00:00
abstract::Transforming growth factor beta (TGF-beta) is a major member of a cytokine family with pluripotent biological activity. In the liver, TGF-beta has pathophysiological significance with respect to hepatic fibrogenesis, regulation of liver cell growth, tumor development, and induction of hepatocellular apoptosis. We show...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050740
更新日期:1997-01-01 00:00:00
abstract::Within seminiferous tubules, Sertoli cells form three types of actin-filament-containing cell junctions, viz., tight junctions, ectoplasmic specializations, and tubulobulbar complexes. These Sertoli cell junctions are involved in the formation of the blood-testis barrier, germ cell translocation, and the release of sp...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-004-0864-z
更新日期:2004-05-01 00:00:00
abstract::An immunohistochemical staining technique with the D2-40 antibody was undertaken to examine the functional and morphological features of lymphatic networks in tissue sections and whole-mount preparations of normal nasal mucosa and ethmoid sinus mucosa. In normal nasal mucosa, most lymphatic vessels were found in the s...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-006-0337-7
更新日期:2007-03-01 00:00:00
abstract::Evidence has already been adduced suggesting that an increase in microtubular number occurs in the tractus hypophyseus of rats stressed by the administration of hypertonic saline, and of rats with congenital diabetes insipidus (CDI). Since the tractus hypophyseus in these animals shows high secretory activity, it seem...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00219611
更新日期:1976-06-28 00:00:00
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journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-004-0964-9
更新日期:2004-12-01 00:00:00
abstract::The therapeutic potency of delivered mesenchymal stem cells (MSCs) in tissue engineering applications may be improved by priming cells toward a differentiated state via coculture with native, differentiated cells prior to implantation; however, there is a lack of understanding in what may be the most efficacious metho...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-011-1265-8
更新日期:2012-03-01 00:00:00
abstract::Gap junctions in the phylum Brachiopoda are shown to be of the P type as has been previously reported in invertebrates only in molluscs and possibly bryozoans. However, the mollusc gap junctions appear identical to vertebrae gap junctions in the fracture face on which particles remain, in particle spacing and in parti...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00206345
更新日期:1982-01-01 00:00:00
abstract::The interendothelial junctions of all segments of the renal vasculature have been studied in eight species using the freeze-fracture technique. Three types of junctions have been found. Combinations of tight and gap junction elements are characteristic for interlobular arteries and proximal afferent arterioles. Contin...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00217224
更新日期:1984-01-01 00:00:00
abstract::It has long been disputed whether mammalian enterochromaffin (EC-) cells contain a peptide in addition to serotonin. Previous immunohistochemical studies have provided evidence for the presence of enkephalins in EC-cells. These findings, however, are equivocal. Therefore, the problem of opioid peptides in EC-cells has...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00221752
更新日期:1988-07-01 00:00:00
abstract::Human endothelial progenitor cells (EPCs) were isolated from cord blood samples and enriched by magnetic activated cell sorting method based on the CD133 marker. Cells were incubated with different doses of bacterial lipopolysaccharide, ranging from 2, 5, 10, 50, 100, 200, 250, 500, to 1000 µg/ml, for 48 h. The cell s...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-020-03405-4
更新日期:2021-01-18 00:00:00
abstract::Studies with environmental levels of various metals typically focus on observable neurological symptoms in newborns and adults. Use of the C2C12 skeletal muscle cell line as a developmental model enabled us to test whether environmental insults prevented myotube formation or the assembly of the postsynaptic component ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-004-0878-6
更新日期:2004-05-01 00:00:00
abstract::The distribution of VIP-like perikarya and fibers was determined throughout the chick brain. The most rostral immunoreactive perikarya were found to be cerebrospinal fluid-contacting neurons in the pars medialis of the lateral septal organ. Additional data were presented supporting the idea that the lateral septal org...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00305378
更新日期:1994-01-01 00:00:00
abstract::Differentiated nongranulated (folliculo-stellate) cells were observed in the centre and periphery of the cords of cells in the pars distalis of the adult tammar wallaby (Macropus eugenii). The nongranulated cells formed follicles containing a small lumen: the cell apices were joined by junctional complexes including z...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00210898
更新日期:1982-01-01 00:00:00