Abstract：
:Chemoreception in marine invertebrates mediates a variety of ecologically important behaviors including defense, reproduction, larval settlement and recruitment, and feeding. The sensory pathways that regulate deposit-feeding activity by polychaetes living in sedimentary habitats are of particular interest because such feeding has profound effects on the physical and chemical properties of the habitat. Nevertheless, little is known concerning the molecular mechanisms of chemical signal transduction associated with deposit feeding and other behaviors in polychaetes. Chemosensory-based feeding behaviors are typically regulated by G-protein-coupled signal transduction pathways. However, the presence and role of such pathways have not been demonstrated in marine polychaetes. Methodologies involving degenerate primer-based reverse transcription with the polymerase chain reaction and rapid amplification of cDNA ends were used to identify and characterize a Galphaq subunit expressed in the feeding palps of the spionid polychaete Dipolydora quadrilobata. The D. quadrilobata Galphaq protein had high sequence similarity with previously reported Galphaq subunits from both invertebrate and vertebrate taxa. Immunhistochemistry and immunocytochemistry were used with confocal laser scanning microscopy and transmission electron microscopy to visualize the distribution of a Galphaq antibody in whole worms and in cilia of the feeding palps. Galphaq immunoreactivity was concentrated in the nuchal organs, food-groove cilia, and lateral/abfrontal cilia of the feeding palps. Because these structures are known to be involved in chemoreception, we propose that Galphaq isolated from D. quadrilobata is a key component of chemosensory signal transduction pathways in this species.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Tsie MS,Rawson PD,Lindsay SMdoi
10.1007/s00441-008-0660-2subject
Has Abstractpub_date
2008-09-01 00:00:00pages
469-80issue
3eissn
0302-766Xissn
1432-0878journal_volume
333pub_type
杂志文章abstract：:With regard to the protein content, as analysed cytophotometrically, of hepatocytes from rats kept under a 12L 12D photoperiod (photophase 7:00-19:00), the following facts have been established: 1) Hepatocytes of different classes of ploidy all demonstrate, more or less equally, daily variations in protein content and...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00221865
更新日期：1986-01-01 00:00:00
abstract：:Cyclooxygenase-2 (COX-2) is a recently discovered isoform of cyclooxygenase that is inducible by various types of inflammatory stimuli. Although this enzyme is considered to play a major role in inflammation processes by catalyzing the production of prostaglandins, the precise location, distribution, and regulation of...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410000296
更新日期：2001-02-01 00:00:00
abstract：:The ultrastructure of the rectal papillae of the parasitoid hymenopteran, Nasonia vitripennis (Walk), is described. These organs in this insect consist of four distinct cell types arranged as a closed, hollow cone. The majority of the cells are present in the raised cone, and are characterised by large numbers of mito...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00220008
更新日期：1975-08-25 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410051132
更新日期：1998-09-01 00:00:00
abstract：:The lymphatic organization and its relationship to the vascular system in the rat small intestine was studied by scanning electron microscopy of corrosion casts and freeze-fractured tissues, and by light microscopy of injected preparations. The villus possessed 3-10 or more central lacteals depending upon the villous ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00218204
更新日期：1987-05-01 00:00:00
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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
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00224373
更新日期：1978-02-24 00:00:00
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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
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00222304
更新日期：1988-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00216522
更新日期：1984-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00218994
更新日期：1986-01-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00229618
更新日期：1978-03-13 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-005-1134-4
更新日期：2005-09-01 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
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-020-03319-1
更新日期：2021-01-06 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00209272
更新日期：1978-05-29 00:00:00
abstract：:Developmental alterations of paranodal fiber segments have not been investigated systematically in human nerve fibers at the light- and electron-microscopic level. We have therefore analyzed developmental changes in the fine structure of the paranode in 43 human sural nerves during the axonal growth period up to 5 yea...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00333704
更新日期：1993-09-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00220613
更新日期：1977-02-14 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00215176
更新日期：1976-04-09 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00225806
更新日期：1988-11-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00236418
更新日期：1979-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00221087
更新日期：1977-02-09 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00221758
更新日期：1988-07-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00219555
更新日期：1978-07-10 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s00441-017-2612-1
更新日期：2017-08-01 00:00:00
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journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00236082
更新日期：1979-07-17 00:00:00
abstract：:To obtain more information concerning the origin of dendritic reticulum cells, the development of germinal centers in the spleens of rabbits was investigated by conventional light microscopy, enzyme histochemistry, and electron microscopy. Washed sheep erythrocytes were used as antigen. Splenic tissue was examined on ...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00237632
更新日期：1980-01-01 00:00:00
abstract：:In Syrian hamsters (Mesocricetus auratus), oxytocin (OXT) activity within the medial preoptic-anterior hypothalamus (MPOA-AH) and the ventromedial hypothalamus (VMH) plays an important role in the expression of sexual receptivity. Immunocytochemical analysis with OXT-specific antibodies was used to identify the distri...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/s004410050993
更新日期：1998-02-01 00:00:00
abstract：:Transplantation of a small fragment of the ileum beneath the kidney capsule in syngenic mice results in the formation of a cyst lined with proliferating intestinal epithelium. The duration of the cell cycle in the epithelium was determined (using tritiated thymidine and the FLM method) as 14.5 h, as compared with 11.5...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00221125
更新日期：1977-02-02 00:00:00
abstract：:Immunoreactivity for calcitonin gene-related peptide is demonstrated for the first time in neuroepithelial bodies in the lung of newborn cats after Bouin fixation and embedding in paraffin. The intense staining clearly identifies these bodies at the level of bronchioli and alveoli. Occasionally, single neuroepithelial...
journal_title：Cell and tissue research
pub_type： 杂志文章
doi：10.1007/BF00215517
更新日期：1987-08-01 00:00:00
