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Biological structures and morphogenesis最新文献

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On the fine structure and complex carbohydrate cytochemistry of the rabbit parotid gland. 兔腮腺精细结构及复杂碳水化合物细胞化学研究。
Biological structures and morphogenesis Pub Date : 1992-01-01
G Menghi, A M Bondi, L Marchetti, L Fumagalli
{"title":"On the fine structure and complex carbohydrate cytochemistry of the rabbit parotid gland.","authors":"G Menghi,&nbsp;A M Bondi,&nbsp;L Marchetti,&nbsp;L Fumagalli","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The parotid gland of the rabbit, a lagomorph species, was studied by ultrastructural techniques and carbohydrate ultracytochemical stainings. The rabbit parotid gland is a peculiar mixed gland consisting of serous and mucous secretory cells due to their histochemical properties supported by biochemical findings. Acinar cells exhibit heterogeneous features of secretory granules with different electrondensity and occasional presence of subunits. Intercalated duct cells show nuclei with deep indentation and apical granules partly similar to acinar secretory products. Striated ducts are characterized by three different cell populations, namely \"light cells\" with small secretory granules, \"dark cells\" rich of scattered mitochondria and typical striated cells. The presence of differentiated cell types within striated duct segments lends credence to the idea that, in addition to the role in electrolyte transport, some ductal cells may be involved in secretion and/or absorption of glycosylated products.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"4 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12557203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hermaphroditism in young mouse chimeras. 幼鼠嵌合体的雌雄同体现象。
Biological structures and morphogenesis Pub Date : 1992-01-01
E Jankowska-Steifer, E T Mystkowska, W Ozdzenski
{"title":"Hermaphroditism in young mouse chimeras.","authors":"E Jankowska-Steifer,&nbsp;E T Mystkowska,&nbsp;W Ozdzenski","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Among 23 5-day old mouse chimeras, 11 were sex chimeras. Four of them were hermaphrodites, six were males and one was female. In the gonads of three hermaphrodites fragments of ovarian tissue were very small. Growing oocytes were observed not only in ovotestes but also in testes. The course of transformation of ovotestes into testes is discussed.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"4 3","pages":"78-80"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12472980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dose-dependent vitamin D3, 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3-induced hypercalcemia and hyperphosphatemia, and the correlative changes in the activity of ultimobranchial and parathyroid glands of the toad, Bufo andersoni Boulenger. 剂量依赖性维生素D3、25-羟基维生素D3和1,25-二羟基维生素D3诱导蟾蜍高钙血症和高磷血症及甲状旁腺和鳃旁腺活性的相关变化
Biological structures and morphogenesis Pub Date : 1992-01-01
K Swarup, A K Pandey, N Hasan, V K Das
{"title":"Dose-dependent vitamin D3, 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3-induced hypercalcemia and hyperphosphatemia, and the correlative changes in the activity of ultimobranchial and parathyroid glands of the toad, Bufo andersoni Boulenger.","authors":"K Swarup,&nbsp;A K Pandey,&nbsp;N Hasan,&nbsp;V K Das","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Vitamin D3, 25(OH) vitamin D3 and 1,25 (OH)2D3 were administered daily to unfed male Bufo andersoni for 15 days which resulted in a significant hypercalcemia and hyperphosphatemia in a dose-dependent fashion. 1,25(OH)2D3 is more potent than the other metabolites. The treatment activated ultimobranchial gland but induced degenerative changes in parathyroid of the toads.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"4 4","pages":"174-81"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12512753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution of dopamine immunoreactive systems in brain stem and spinal cord of the chameleon. 多巴胺免疫反应系统在变色龙脑干和脊髓中的分布。
Biological structures and morphogenesis Pub Date : 1990-01-01
M Bennis, A Calas, M Geffard, H Gamrani
{"title":"Distribution of dopamine immunoreactive systems in brain stem and spinal cord of the chameleon.","authors":"M Bennis,&nbsp;A Calas,&nbsp;M Geffard,&nbsp;H Gamrani","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An immunohistochemical method, using glutaraldehyde fixation and a highly specific monoclonal antibody recently synthetized against dopamine (DA)-glutaraldehyde protein conjugate, permitted direct visualization of DA structures in the brainstem and spinal cord of a reptile (Chameleon). DA-immunoreactive cell bodies occurred in some contiguous areas of the midbrain tegmentum. The first one was located in the ventral tegmental area. Some somata intermingled with the oculomotor nucleus. The second group was the large round or oval DA-Immunostained neurons located in the substantia nigra. More caudally, a third group of round or fusiform DA-cell bodies was seen in an homologous area of so called mammalian A8 and were continuous with the substantia nigra group. In the medulla oblongata, the DA-containing cells were shown in the nucleus of solitary tract and in the dorsal lateral part of the dorsal motor nucleus of the vagus. The density of this DA-Immunoreactive neurons decreased more caudally. At the medullo-spinal level and upper cervical spinal cord, a few labelled cells were distinguished near the central canal. In the spinal cord DA-immunopositive cell bodies were observed in the vicinity of the central canal and formed a continuous column that extended throughout the rostral spinal cord. The apical processes of these neurons seemed to be in contact with the lumen of the central canal. This study constitute the first visualization of the immunoreactive DA-cell bodies at the medullo-spinal level which were already described, as TH immunoreactive in other species of reptiles.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 1","pages":"13-9"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13247404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of training on fibre composition in rat gastrocnemius muscle. 训练对大鼠腓肠肌纤维组成的影响。
Biological structures and morphogenesis Pub Date : 1990-01-01
J L Morales-Lopez, E Agüera, F Miro, A M Galisteo
{"title":"Effects of training on fibre composition in rat gastrocnemius muscle.","authors":"J L Morales-Lopez,&nbsp;E Agüera,&nbsp;F Miro,&nbsp;A M Galisteo","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Forty-eight adult Wistar rats were divided into four groups for experimentation. The group I was used as a control and groups II, III and IV underwent progressive treadmill training. Samples of the red and mixed portions of m. gastrocnemius (lateral head) were stained with the histochemical technique of m-ATPase to determine the percentage of type I, IIA and IIB fibres, and with NADH-TR, in order to quantify variations in \"low-oxidative\" fibre percentages. The results showed that progressive training did not lead to statistical variations in the percentage of type I fibres. However, the proportion of type IIA fibres rose, while that of IIB fibres fell, in both cases significantly. Variations were more marked in mixed than in red Gastrocnemius muscle. A clear decrease was noted in \"low-oxidative\" fibres, which were virtually absent from red portion. This decrease was more marked, and occurred more rapidly, than in type IIB fibres.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 2","pages":"53-6"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13254088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Light and electron microscopical immunolocalization of neuropeptide Y-containing nerves in the hamster gallbladder. 仓鼠胆囊含神经肽y神经的光镜和电镜免疫定位。
Biological structures and morphogenesis Pub Date : 1990-01-01
J Gilloteaux, B J Pomerants, T R Kelly, R Menu, G Pelletier, J J Vanderhaeghen
{"title":"Light and electron microscopical immunolocalization of neuropeptide Y-containing nerves in the hamster gallbladder.","authors":"J Gilloteaux,&nbsp;B J Pomerants,&nbsp;T R Kelly,&nbsp;R Menu,&nbsp;G Pelletier,&nbsp;J J Vanderhaeghen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Neuropeptide Y (NPY)-containing nerve structures were detected in the Syrian hamster gallbladder by using peroxidase-antiperoxidase immunohistochemical staining and immunoelectron microscopic techniques. In addition, Alcian blue-P.A.S. was used to differentiate two types of surface cells in the epithelium of the gallbladder: the columnar cells and the tuft cells. NPY-immunoreactive varicose nerve fibers were detected in the adventitial layer of the arterioles, precapillary arterioles and around axial venules of mucosal folds; they were not observed in the capillary beds. Since NPY is associated with norepinephrine (NE) in the sympathetic nerves, it could prolong the adrenergic vasoconstrictive effects. We propose that NPY and NE are simultaneously released to restrict the blood flow in the subepithelial capillary beds by increasing vascular resistance thereby perturbing the absorption of water and electrolytes.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 3","pages":"89-96"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13285568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ultrastructure and permeability of immature neural and extraneural blood vessels. 未成熟神经和神经外血管的超微结构和通透性。
Biological structures and morphogenesis Pub Date : 1990-01-01
M Bertossi, L Roncali, B Nico, D Ribatti, L Mancini
{"title":"Ultrastructure and permeability of immature neural and extraneural blood vessels.","authors":"M Bertossi,&nbsp;L Roncali,&nbsp;B Nico,&nbsp;D Ribatti,&nbsp;L Mancini","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The ultrastructure and permeability to the marker horseradish peroxidase in the leptomeningeal and neural vessels of the optic lobes, and in the wing bud vessels, were compared, during early stages of chick embryo vasculogenesis, in order to ascertain whether young neural vessels, like mature ones, possess structural specificity preventing the free transport of molecules through their wall (blood-brain barrier). The results demonstrated that immature endothelia are always permeable to the tracer, since the marker passes the vessel wall through the interendothelial clefts (paracellular route) as well as by endo-exocytotic mechanisms (transcellular route). Nevertheless, the transport by vesicles is somewhat reduced in the neural vessels compared to that in the extraneural ones, suggesting that the former may be influenced by the surrounding neuropile to differentiate in a specific manner right from early development.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 1","pages":"37-44"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13247336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Variations in fibre size in the gastrocnemius muscle of rats undergoing training. 训练大鼠腓肠肌纤维大小的变化。
Biological structures and morphogenesis Pub Date : 1990-01-01
J L Morales-Lopez, E Agüera, J G Monterde, J Vivo, A M Galisteo
{"title":"Variations in fibre size in the gastrocnemius muscle of rats undergoing training.","authors":"J L Morales-Lopez,&nbsp;E Agüera,&nbsp;J G Monterde,&nbsp;J Vivo,&nbsp;A M Galisteo","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Sixty-six Wistar rats of both sexes were divided into six groups. One group was used as control, and the others underwent different training schedules. Muscle samples taken from the red and mixed portions of m. Gastrocnemius (caput lateralis) were stained with m-ATPase in order to identify fibre types I, IIA and IIB. These fibres were measured in order to determine their minimum diameter. The most notable results obtained were: a) the three types of fibre were generally larger in males than in females; b) the mean minimum diameter of fibres from the mixed portion was smaller than those of the red portion, except type IIB fibres, and c) the training schedules involved generally led to slight hypertrophy of all types of fibres, although this finding was more significant in the mixed portion of m. Gastrocnemius.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 1","pages":"27-30"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13247406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Teratogenic effects of nicotine on palate formation in mice. 尼古丁对小鼠上颚形成的致畸作用。
Biological structures and morphogenesis Pub Date : 1990-01-01
A Y Saad, L P Gartner, J L Hiatt
{"title":"Teratogenic effects of nicotine on palate formation in mice.","authors":"A Y Saad,&nbsp;L P Gartner,&nbsp;J L Hiatt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Fetuses of pregnant CD-1 mice, exposed to intraperitoneal injection of 0.1% nicotine sulfate at a dose of 1.67 mg/kg body weight/day on gestational days 6-15, were compared with control (saline injected and non-injected) fetuses to assess the effects of nicotine on fetal growth in general and palatogenesis in particular. A total of 59 pregnant females (18 experimental and 41 control) were sacrificed on the 18 th gestational day and their fetuses were examined gross morphologically and histologically (using serial sections through the head in the frontal plane). Data analysis revealed that maternal weight gain, crown-rump length, fetal weight and head dimensions were significantly reduced in nicoted treated animals when compared to those of the controls. Histological examination revealed that 9.6% of fetuses of nicotine injected mothers presented clefts of the palate, whereas none of the control fetuses had that anomaly. It was concluded that nicotine has a detrimental effect on general growth and development as well as on palatogenesis of mice.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 1","pages":"31-5"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13247334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Macroscopical and microscopical anatomy of the hippocampus in the dog. 狗海马的宏观和微观解剖。
Biological structures and morphogenesis Pub Date : 1990-01-01
I Salazar, P Fernandez Troconiz, J M Cifuentes, P Ruiz Pesini
{"title":"Macroscopical and microscopical anatomy of the hippocampus in the dog.","authors":"I Salazar,&nbsp;P Fernandez Troconiz,&nbsp;J M Cifuentes,&nbsp;P Ruiz Pesini","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In this article we have studied the topography, relationship and projection of the hippocampus in the dog by means of 1 mm thick transverse, horizontal and parasagital sections stained with Mulligan's reagent and 50 microns transverse sections (Nissl). The macroscopical disposition of this part of the CNS was completed by means of a gross dissection. Horizontal sections of 10 microns through the middle or limbic part were used to determine the general microscopic anatomy and to define the morphometry of its cells. From this point of view the Hippocampus of the dog appears to be intermediate between the rat and primates, species better studied.</p>","PeriodicalId":77037,"journal":{"name":"Biological structures and morphogenesis","volume":"3 2","pages":"45-52"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13254085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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