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Volume 73 (1996 - 199･･･
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Volume 73, Issue 5
Displaying 1-6 of 6 articles from this issue
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Shiro MORI1996 Volume 73 Issue 5 Pages 219-227
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: The distribution and morphology of neuropeptide Y-like immunoreactive (NPY+) neurons in area 17 were studied in 4 chimpanzees (15 to 56 years old) with the aid of immunocytochemical methods. The NPY+ neurons were not pyramidal, but were either multipolar, bipolar, or bitufted in shape. They occurred most frequently in layer 6 and the subjacent white matter, they were sparser in the supragranular layers, and were few in layer 4. The NPY+ somata in the supragranular layers were significantly smaller than those in the infragranular layers. The axon of NPY cells originated either from the soma or from the primary dendrite. The distribution and morphology of NPY+ neurons were not different between the youngest and the oldest chimpanzee. The oval shape of NPY+ neurons, however, changed slightly with aging to a more circular shape. The density of NPY+ fibers was laminar-dependent. A distinct plexus extended through the upper part of layer 4 and the lowest aspect of layer 3. A thin fiber band was found in the lowest part of layer 4. Some NPY+ axons vertically traversed the cortex between pia and white matter. In the superficial layers, “snarls” of fibers appeared.View full abstractDownload PDF (2831K) -
Tatsumi OSHIKAWA, Ryoko BABA, Mamoru FUJITA1996 Volume 73 Issue 5 Pages 229-245
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: Apical endocytosis in the absorptive cells of the suckling rat jejunum was examined in vivo using the intraluminal injection of a range of different lectin-horseradish peroxidase (HRP) conjugates.
Con A-HRP, PNA-HRP, LCA-HRP and RCA120-HRP bound strongly to components of the glycocalyx on the plasma membrane of the microvilli, apical coated pits and the small tubular pits at the base of the microvilli of the absorptive cells. The lectin-conjugates on the plasma membranes were endocytosed from the coated pits and small tubular pits, and then transported into coated vesicles, vesicles and small tubules. Lectin-HRP conjugates were later found within the intercellular space. In contrast, SBA-HRP and DBA-HRP bound weakly to the plasma membranes. The absorptive cells demonstrated little uptake or transepithelial transport.
When WGA-HRP was injected into the intestinal lumen in vivo, the jejunum absorptive cells formed a deep and wide apical invagination at the base of the microvilli. WGA-HRP bound strongly to the components of the glycocalyx on the plasma membranes of the microvilli, the deep and wide apical invaginations, the apical coated pits and the small tubular pits. The WGA-HRP conjugate was also found in the coated vesicles, tubules, early endosomes, late endosomes, multivesicular bodies and lysosomes, and within the intercellular space. The lectin-HRP conjugate on the plasma membranes however was almost entirely transported into the early endosomes, late endosomes, multivesicular bodies and lysosomes.
Therefore, lectin-HRP conjugates may bind to the glycocalyx component on the apical membrane domains, thus resulting in different membrane formations of apical endocytosis by adsorption to the apical plasma membrane specific glycoconjugates in the absorptive cells of the suckling rat jejunum. In addition, WGA induces deep and wide invaginations in the dynamic (not static) membrane domain of the apical plasma membrane in the suckling rat jejunum in vivo.View full abstractDownload PDF (8363K) -
Junji ITO1996 Volume 73 Issue 5 Pages 247-251
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: Morphological study of the muscles of the lower extremity is necessary for the analysis of the muscular function and its relation with locomotion. In this study, the muscle weight of the lower extremities from 11 adult Japanese cadavers (6 males and 5 females, aged from 50 to 91 years old) were measured. The morphological characteristic of the human lower extremity is discussed based on the relative muscular weight. The largest muscles were the gluteus maximus (the extensor at the hip joint), the vasti muscles (the extensor at the knee joint) and the soleus (the plantarflexor at the ankle joint). These results reveal that the muscles acting on one joint are developed in the human lower extremity and that these muscles have important roles in human locomotion.View full abstractDownload PDF (1102K) -
M. ÇIMEN, E. GÜRSOY, C. KALOGLU1996 Volume 73 Issue 5 Pages 253-263
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: In this study carried out on the development of arteriovenous anastomoses (AVAs) in Rattus norvegicus species, the fetus was followed up 10 days after post coitum (pc). The sections obtained from the fetuses of 10-20-day rats were subjected to the usual processes for examination under the light microscope. Various staining processes were applied on the preparations and the simple and glomus types of AVAs determined in the mesenchyme of fetuses observed to birth every day. The regions with AVAs were then photographed by photomicroscopy and evaluated. From the 10-day embryo to birth, an increase in the smooth muscles in the wall structure of simple anastomoses was observed. It was however very difficult to follow up this increase in glomus anastomoses because the wall structure is more complicated. Their morphology was examined and compared with that in literature.View full abstractDownload PDF (3897K) -
Renato MASSAHARU HASSUNUMA, Rumio TAGA1996 Volume 73 Issue 5 Pages 265-271
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: The authors studied the rat sublingual glands growth in the period of 2 to 40 days of the postnatal life. The allometric coefficients for the gland mass growth and morphometrically evaluated volume of different gland components in relation to body mass growth, and for the parenchymal volume growth in relation to stroma volume growth, were calculated by the Wald non parametric method, modified by Bartlett. The allometric analysis showed that the gland mass, the mucous cells volume, the serous cells volume, the duct volume and the stroma volume exhibited statistically significant allometric growths with monophasic pattern and allometric coefficient of 0.93,1.11,0.76,0.86 and 1.00, respectively. The analysis of the confidence intervals for these various k values, permitted to conclude that the differential growth of the gland mass is isometric, of the mucous cells volume is positive, of the serous cells and duct are negative and of the stroma volume is isometric.View full abstractDownload PDF (1329K) -
Norio KAWAI1996 Volume 73 Issue 5 Pages 273-281
Published: December 20, 1996
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSSummary: Mobility of anionic residue-containing molecules on 3T3 and simian virus 40-transformed 3T3 (SV40-3T3) cell surfaces was ultrastructurally examined using polycationic ferritin(CF)particles in Vitro. CF-binding experiments at 4°Cshowed continuous distribution of CF particles on entire surfaces of both cells. When 3T3 cells were incubated with CF at 37°C, cell membrane-bound CF particles were rearranged to form clusters in sparse cultures. Almost all CFs on the ventral cell surface were present in clusters. Clustering rate and size were smaller on the dorso-lateral surface in high cell density than on the same region in low density. On the ventral in high density, CFs distributed in clusters or singly at broader zone than in sparse cultures. In the case of sparse cultures on dishes from which confluent 3T3 cells had been removed, the CF distribution pattern was similar to that in high density. On the other hand, its density-dependent change was hardly found in both surfaces of transformed counterparts. The clustering was remarkable on all cell surface areas and tended to differ regionally. The distribution pattern was similar to those in sparse 3T3 cell cultures. These results show cell density-, membrane region- and extracellular matrix-dependent mobility of anionic residue-containing molecules on the 3T3 cell membrane, and remarkably high, a little region-dependent, and density- and matrix-independent mobility in SV40-3T3cells, suggesting relation of the mobility to cell-cell communication.View full abstractDownload PDF (3298K)
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