Abstract：
:Signal transduction elements, including protein kinase C, have been identified in mammalian spermatozoa. In order to evaluate the pattern of expression and the subcellular localization of nine different protein kinase C isoforms in the course of spermatogenesis, we utilized quantitative electron microscopy immunocytochemistry on thin sections of rat seminiferous tubules. The results indicate a progressive reduction of the protein kinase C isoforms present in the early stages of spermatogenesis, so that in late spermatids none of them is present in the nucleus, while the isoforms alpha, gamma and beta II are specifically retained in the acrosome, the isoforms beta I and zeta in the neck, and the isoform epsilon in the tail. These isoforms, except for beta II, are maintained at the same sites in spermatozoa. Western blotting analysis indicates the presence of alpha and gamma isoforms in the head subfraction, and of beta I, zeta and epsilon isoforms in the tail subfraction of spermatozoa. These findings suggest that specific protein kinase C isoforms may be functionally involved in some events of spermatozoa differentiation and, eventually, in the fertilization process.
journal_name
Eur J Cell Bioljournal_title
European journal of cell biologyauthors
Zini N,Matteucci A,Sabatelli P,Valmori A,Caramelli E,Maraldi NMsubject
Has Abstractpub_date
1997-02-01 00:00:00pages
142-50issue
2eissn
0171-9335issn
1618-1298journal_volume
72pub_type
杂志文章abstract：:The neural cell adhesion molecule (NCAM) plays a key morphoregulatory role during neural development. Patterns of NCAM expression were investigated in cultured astrocytes exhibiting distinct states of morphological differentiation. In vitro differentiation of confluent primary cultures of astrocytes was enhanced by a ...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1993-12-01 00:00:00
abstract：:The intracellular storage of zinc in Malpighian tubules of Drosophila hydei was studied by X-ray microanalysis of freeze-dried cryosections. Mass dense vacuoles in the proximal region of the anterior larval Malpighian tubule cells were found to accumulate zinc, not sodium. The zinc content was enhanced considerably af...
journal_title：European journal of cell biology
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doi：
更新日期：1990-12-01 00:00:00
abstract：:A three-dimensional cytoskeleton, morphologically composed of intermediate filaments, desmosomes, and Z-disks, remains in bovine heart Purkinje fibres after extraction with Triton X-100 and low and high ionic strength solutions. Biochemically this cytoskeleton mainly consists of skeletin (Mr approximately 55 000) and ...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1982-08-01 00:00:00
abstract：:In the presence of various commonly used buffers, phosphate-buffered saline (PBS), tris-buffered saline (TBS), Na-cacodylate, bovine serum albumin and a wide range of cytochemically active proteins (monoclonal and polyclonal IgG, concanavalin A, Ricinus communis lectin I, Helix pomatia lectin, protein A) were complexe...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1986-12-01 00:00:00
abstract：:A remarkable amount, of water is transported in the gastrointestinal (GI) organs to fulfil the secretory and absorptive functions of the GI tract. However, the molecular basis of water movement in the GI epithelial barriers is still poorly known. Important clues about the mechanisms by which water is transported in th...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：10.1078/0171-9335-00210
更新日期：2001-11-01 00:00:00
abstract：:In search for the cellular mechanisms of graviperception in basidiomycete fruit bodies, nuclear and vacuole motility was investigated in the fungus, Flammulina velutipes. In this organism, hyphal nuclei are closely linked with the actin cytoskeleton, which is involved in gravity perception. Active motion of the nuclei...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1996-10-01 00:00:00
abstract：:We have studied, at the electron microscope level, the reorganizations of nucleolar ultrastructure induced by actinomycin D (AMD) in different conditions of drug treatment associated with an inhibition of rRNA synthesis. We have analyzed in parallel the localizations of ribosomal genes, of their transcripts, of variou...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1992-06-01 00:00:00
abstract：:The mutation raised (rsd, 3-95.4) of Drosophila melanogaster causes flightlessness as a consequence of abnormalities in the fibrillar flight muscles (FFMs). In this muscle type actin III is neither synthesized nor accumulated while adult tubular muscles of rsd flies are indistinguishable from wildtype. This paper demo...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1985-01-01 00:00:00
abstract：:Differences in the carbohydrate composition were found in the jellies and the cortex of the unfertilized Xenopus laevis egg using lectins and blood group antibodies. Blood group H trisaccharide was detected in the outer jelly and "A-like" oligosaccharide was found in the inner jelly. The blood group A trisaccharide wa...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1988-10-01 00:00:00
abstract：:We describe here the cloning, expression and characterisation of centaurin-alpha2 from a rat adipocyte cDNA library. The centaurin-alpha2 cDNA contains an open reading frame, which codes for a protein of 376 amino acids with predicted mass of 43.5 kDa. Centaurin-alpha2 shares 51-59% identity with centaurin-alpha1 prot...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：10.1078/0171-9335-00242
更新日期：2002-04-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1991-08-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：10.1016/j.ejcb.2016.10.003
更新日期：2016-12-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1979-08-01 00:00:00
abstract：:Glucocorticoid hormones regulate the transcription of nuclear genes by way of their cognate receptors. In addition, these hormones also modulate mitochondrial gene transcription by mechanisms which are as yet poorly understood. Using immunofluorescence labeling and confocal laser scanning microscopy we show that the g...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：10.1078/S0171-9335(04)70033-3
更新日期：2000-05-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1995-09-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1995-03-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1983-11-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：10.1016/s0171-9335(99)80074-0
更新日期：1999-07-01 00:00:00
abstract：:In order to investigate the role of microfilaments in the crawling movements of lymphoid cells, we have analyzed the effects of botulinum C2 toxin and of cytochalasin D (cytoD) on the actin cytoskeleton and on the motility of a BW5147 T-lymphoma-derived cell line. Actin was ADP-ribosylated by C2 toxin in the living ce...
journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1995-04-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1992-08-01 00:00:00
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journal_title：European journal of cell biology
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journal_title：European journal of cell biology
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doi：
更新日期：1994-06-01 00:00:00
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journal_title：European journal of cell biology
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doi：10.1016/S0171-9335(99)80063-6
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1979-08-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1993-02-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1984-05-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1981-08-01 00:00:00
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1993-10-01 00:00:00
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journal_title：European journal of cell biology
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journal_title：European journal of cell biology
pub_type： 杂志文章
doi：
更新日期：1981-06-01 00:00:00
