Abstract:
:Immunocytochemistry was used to determine if photoperiod and/or sex have any effect on the pattern of the luteinizing hormone-releasing hormone (LHRH) system in the brain of the Japanese quail. Immunopositive perikarya were found within three major areas of the brain: the rostral paraolfactory lobe, the preoptic, and the septal region. A quantitative analysis of LHRH cell numbers was performed on male and female quail after two photoperiodic treatments: sexually mature birds exposed to 24 weeks of 20 h light: 4 h darkness (20L:4D), and birds with a regressed reproductive system (induced by transfer from a photoregime of 20L:4D to 25 short days of 8L:16D). Two-way analysis of variance showed that short-day males display significantly (p less than 0.05) more immunopositive perikarya (607 +/- 134) than long-day males (291 +/- 114), short-day females (293 +/- 103) or long-day females (330 +/- 92). The density of LHRH-immunoreactive nerve fibres and the intensity of the immunostaining in the median eminence were always greater in long-day sexually mature quail (male and female) than in animals exposed to 25 days of 8L:16D. These results demonstrate that the LHRH system of the quail is influenced by photoperiod and mirrors sexual differentiation.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Foster RG,Panzica GC,Parry DM,Viglietti-Panzica Cdoi
10.1007/BF00222289subject
Has Abstractpub_date
1988-08-01 00:00:00pages
327-35issue
2eissn
0302-766Xissn
1432-0878journal_volume
253pub_type
杂志文章abstract::In the compound eye of Notonecta glauca, the backswimmer, there is a small ventral region in which the rhabdoms differ in structure from those in the other parts of the eye. Here, among other unusual features, there is a special orientation of the microvilli of the central rhabdomeres, i.e., in most of the median eye ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00222373
更新日期:1983-01-01 00:00:00
abstract::Bone morphogenetic proteins (BMPs) induce cartilage and bone formation at both bony and non-bony sites. We examined the possibility whether BMP-2 induces differentiation of osteoblast progenitors into chondroblast lineage cells using organ culture and cell culture prepared from the calvaria of newborn mouse. BMP-2 sti...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410050562
更新日期:1996-04-01 00:00:00
abstract::The skeletal body muscle of vertebrates is derived from segmentally arranged mesodermal structures, the somites. Only the dorsal epithelial half of the somite, the dermomyotome, gives rise to muscle cells during normal development. Head muscle takes its origin from the somites, the unsegmented paraxial head mesoderm a...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s004410051281
更新日期:1999-04-01 00:00:00
abstract::Whether an axon will regenerate after it is cut depends on the balance between the intrinisic ability of the axon to regrow and the permissiveness of the environment surrounding it. The permissiveness of the environment is determined by the glial cells at the site of injury, and in the CNS both oligodendrocytes and as...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s004410050943
更新日期:1997-11-01 00:00:00
abstract::The two calcium antagonistic agents lanthanum and tetracaine cause severe disturbances in the secretory process of the exocrine pancreas, including inhibition of the rate of protein synthesis and exocytosis. The former effect resulted mainly from the inhibition of amino acid transport. Lanthanum in a concentration up ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00227029
更新日期:1977-05-10 00:00:00
abstract::The effect of pilocarpine and food uptake on the rate of incorporation of [3H]-leucine in vivo was measured by means of quantitative radioautography in three exocrine cells of the rat: the acinar and the granular duct cells of the submandibular and the acinar cells of the parotid gland. The three cell types react diff...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00219936
更新日期:1975-12-18 00:00:00
abstract::Nucleoside di-phosphate kinase enzyme (NDPK) isoforms, encoded by the nm23 family of genes, may be involved in various cellular differentiation and proliferation processes. We have therefore analyzed the expression of nm23-M1, -M2, -M3, and -M4 during embryonic mouse development. In situ hybridization data has reveale...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-005-0036-9
更新日期:2005-12-01 00:00:00
abstract::Interstitial cells of Cajal (ICC) are morphologically and functionally intercalated between the elements of the enteric nervous system and the smooth muscle cells (SMCs) in the musculature of the digestive tract. Kit immunohistochemistry reliably identifies the location of these cells and provides information on chang...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-010-0957-9
更新日期:2010-06-01 00:00:00
abstract::Pulmonary neuroepithelial bodies (NEBs) are extensively innervated organoid groups of neuroendocrine cells that lie in the epithelium of intrapulmonary airways. Our present understanding of the morphology of NEBs is comprehensive, but direct physiological studies have so far been challenging because the extremely diff...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-005-1111-y
更新日期:2005-07-01 00:00:00
abstract::Sox2-expressing stem/progenitor cells in the anterior lobe of the pituitary gland form two types of micro-environments (niches): the marginal cell layer and dense cell clusters in the parenchyma. In relation to the mechanism of regulation of niches, juxtacrine signaling via ephrin and its receptor Eph is known to play...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-017-2646-4
更新日期:2017-10-01 00:00:00
abstract::Retinal pigment epithelial cells from chicks at various stages of development were examined by transmission electron microscopy to determine how the adult form of the zonula adhaerens, composed of subunits termed zonula adhaerens complexes, is acquired. During early stages of development, between embryonic day 4 and e...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF01740771
更新日期:1990-03-01 00:00:00
abstract::Sacciform cells containing an acidophilic, proteinaceous secretion, were identified in the epidermis of the brown trout and Arctic char. This cell type increased in number during the chronic stages of infestation by the ectoparasitic flagellate, Ichthyobodo sp., in immature brown trout, and decreased during sexual mat...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00218307
更新日期:1987-02-01 00:00:00
abstract::We chose synaptic terminals of rat rod bipolar cells as a model system to study activity-related changes in the overall morphology and the fine structure of synaptic sites. Using confocal laser scanning microscopy in conjunction with three-dimensional reconstruction and electron microscopy, we examined the effect of l...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410051174
更新日期:1998-11-01 00:00:00
abstract::An antiserum against conjugated histamine and two oligonucleotide probes that detect the mRNA encoding L-histidine decarboxylase (HDC) involved in histamine synthesis were used to study the appearance of histamine and its location in the kidneys of fetal, newborn and young postnatal rats and in the kidneys of pregnant...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00302960
更新日期:1992-02-01 00:00:00
abstract::Using a somatostatin-gold conjugate of known biological activity, high affinity binding sites for this neuropeptide were visualized at cellular resolution on cultured diencephalic astrocytes and on frozen sections of the rat diencephalon. Binding could be completely suppressed in competition experiments with surplus u...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00318767
更新日期:1991-02-01 00:00:00
abstract::Ultrastructural investigations showed that development and maintenance of smooth muscle was similar in control and aneurogenic amphibian larvae. This applies to both multi-unit and unitary smooth muscles. The gut musculature displayed a regional variation in smooth muscle morphology and a variety of intermuscular appo...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00227048
更新日期:1976-02-12 00:00:00
abstract::The course of the Nervus connectivus (N.c.), its branches, and synaptic connections within the frontal ganglion (FG) were investigated electron microscopically after cobalt iontophoresis of the N.c. The subsequent treatment of ultrathin sections with Timm's method was found to be very suitable for identifying the smal...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00235172
更新日期:1979-01-01 00:00:00
abstract::Neurosecretory pathways were examined in normal male rats by the use of the immunoperoxidase technique for the localization of neurophysin in Bouin-fixed, deparaffinized sections. Using this technique two projections of extrahypothalamic neuorosecretory fibers can be traced to the sites of origin of the choid plexuses...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00232829
更新日期:1977-03-01 00:00:00
abstract::The European shore crab Carcinus maenas and the common hermit crab Pagurus bernhardus are members of the sister taxa Brachyura and Anomura (together forming the taxon Meiura) respectively. Both species share similar coastal marine habitats and thus are confronted with similar environmental conditions. This study sets ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-012-1353-4
更新日期:2012-04-01 00:00:00
abstract::The circadian timing system is a neural network consisting of the hypothalamic suprachiasmatic nucleus, aided by the retina, other hypothalamic nuclei, autonomic regions of the spinal cord, sympathetic ganglia and the pineal gland. Extensive studies conducted over the last two decades have unravelled the principal ite...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s004410050652
更新日期:1996-09-01 00:00:00
abstract::Changes in the frequency of endocrine cells are evidence of intestinal adaptation to germ-free (GF) status. Not only the distribution of these cells along the intestine, but also the differences in intracellular content of these regulatory peptides may be explored to explain functional and structural aspects of GF int...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s004410000323
更新日期:2001-03-01 00:00:00
abstract::Denervation of radial and ulnar arteries in the growing and adult domestic fowl was achieved by unilateral sectioning of the brachial plexus. Eight weeks later the denervated arteries and those of the contralateral wing were examined with light- and electron microscopy to determine the effect of denervation on arteria...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00218955
更新日期:1987-12-01 00:00:00
abstract::High-density cultures are widely used as an in vitro model for studies of embryonic cartilage formation. In the present study we investigated the suitability of high-density cultures for the redifferentiation of dedifferentiated chondrocytes. When primary human chondrocytes were cultured in alginate beads, some cells ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-002-0562-7
更新日期:2002-06-01 00:00:00
abstract::Two dozen hybrid clones were produced by fusion of diploid embryonic stem (ES) cells positive for green fluorescent protein (GFP) with tetraploid fibroblasts derived from DD/c and C57BL-I(I)1RK mice. Cytogenetic analysis demonstrated that most cells from these hybrid clones contained near-hexaploid chromosome sets. Ad...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/s00441-010-0987-3
更新日期:2010-06-01 00:00:00
abstract::The opioid peptide dynorphin A (1-17) is the third transmitter identified in the striatonigral projection, the other two being gamma-aminobutyric acid (GABA) and substance P. The ultrastructural features of the dynorphinergic terminals in substantia nigra/pars reticulata were studied using pre-embedding immunocytochem...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00329443
更新日期:1990-07-01 00:00:00
abstract::The development of neurophysin-oxytocin and neurophysin-vasopressin containing neurons of the guinea pig was studied in vitro. Supraoptic (SO) and paraventricular (PV) nuclei were explanted from guinea pig foetuses at the 40th day of gestation and cultured in Maximov slides for nearly fifty days. The cultures were obs...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00233269
更新日期:1979-01-01 00:00:00
abstract::The larval stage of Polypodium hydriforme is planuliform and parasitic inside the growing oocytes of acipenserid fishes. The larva has inverted germ layers and a special envelope, the trophamnion, surrounding it within the host oocyte. The trophamnion is a giant unicellular provisory structure derived from the second ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00237977
更新日期:1980-01-01 00:00:00
abstract::Angiogenesis, the growth of new blood vessels, is required for a variety of normal proliferative processes. Furthermore, angiogenesis is well established as also playing an important role in neoplastic growth and metastasis. Numerous regulators of angiogenesis have been identified and characterized over the last few d...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s00441-008-0675-8
更新日期:2009-01-01 00:00:00
abstract::Transforming growth factor-β (TGFβ) is the prototype for a large family of pleiotropic factors that signal via heterotetrameric complexes of type I and type II serine/threonine kinase receptors. Important intracellular mediators of TGFβ signaling are members of the Smad family. Smad2 and 3 are activated by C-terminal ...
journal_title:Cell and tissue research
pub_type: 杂志文章,评审
doi:10.1007/s00441-011-1190-x
更新日期:2012-01-01 00:00:00
abstract::The fine structure of the kidney is studied in the sexually mature male three-spined stickleback after administration of an antiandrogen, cyproterone acetate. Under these conditions, the dedifferentiation of renal tubules is characterized by the same involutive processes as those induced by castration, with the differ...
journal_title:Cell and tissue research
pub_type: 杂志文章
doi:10.1007/BF00220324
更新日期:1976-10-13 00:00:00