Archives d'anatomie microscopique et de morphologie experimentale最新文献_第8页

The constituent oocytal layers of the avian germ and the origin of the primordial germ cell yolk. 禽胚的卵母细胞组成层和原始生殖细胞蛋黄的起源。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

M Callebaut

{"title":"The constituent oocytal layers of the avian germ and the origin of the primordial germ cell yolk.","authors":"M Callebaut","doi":"","DOIUrl":"","url":null,"abstract":"By radioactive or trypan blue induced fluorescence yolk labelling (used at certain developmental stages as intravital cytoplasmic markers), it can be demonstrated that the constituent yolk layers of quail blastoderms are formed when the precursor oocyte is growing from 3 to approximately 18 mm (rapid growth period). A previous study ( Callebaut , 1974) and the present study demonstrate that 2 cytoplasmic regions, each with a different constitution and behaviour, can be discerned in the avian germinal disc: 1) a deep and paraxial region, containing yolk that has been in contact with the t.i.c.o.s. (3H-thymidine incorporating cytoplasmic organelles) during oogenesis; 2) a superficial and peripheral region, which has not been in contact with the t.i.c.o. material and which penetrates into the first region along with the cleavage furrows. In the large blastomeres, the originally superficial ooplasm surrounds the deep ooplasm. The area centralis of the unincubated blastoderm must be considered as a heterogeneous cell population, containing both deep and superficial material in variable amounts. After laying and incubation, extra-embryonic tissues such as yolk endoderm and margin of overgrowth develop in the superficial and peripheral region. The embryonic mesoderm also develops from the latter. The yolk, which will be incorporated in the primordial germ cells (germinal yolk), derives only from the original deep and paraxial region of the oocytal germinal disc, i.e. from the region which has been in contact with the t.i.c.o.s. The germinal yolk plasm can be traced in the deep paraxial region of the oocytal germinal disc, in the central region of the unincubated blastoderm, in the endophyll (early primitive streak stage) and finally in the primordial germ cells (P.G.C.s.) at the moment of their separation from the endophyll wall (early somite stage). Thus our results provide evidence for the existence of a germ cell plasm in the avian postlampbrush oocyte.","PeriodicalId":75532,"journal":{"name":"Archives d'anatomie microscopique et de morphologie experimentale","volume":"72 3","pages":"199-214"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17732307","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

Total thymectomy in the early chick embryo. 早期鸡胚全胸腺切除术。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

C S Martin

引用次数: 0

[Ultrastructural study of embryonic development in Grantia compressa F. (Porifera, Calcarea)]. [花椒(Grantia compressa F.， Porifera, Calcarea)胚胎发育的超微结构研究]。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

M F Gallissian

引用次数: 0

[Elongation of mouse spinal cord axons in isogenic grafts of the sciatic nerve, skeletal muscle and submaxillary gland]. [小鼠脊髓轴突在坐骨神经、骨骼肌和颌下腺等基因移植中的伸长]。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

J C Horvat

{"title":"[Elongation of mouse spinal cord axons in isogenic grafts of the sciatic nerve, skeletal muscle and submaxillary gland].","authors":"J C Horvat","doi":"","DOIUrl":"","url":null,"abstract":"Isografts of sciatic nerve, skeletal muscle, submaxillary gland and, as control experiments, of optice nerve, were transplanted into the non transected spinal cord of young albino mice, through a punctiform pial aperture. Under these conditions, local cellular reactions were reduced and the sensori motor behavior of the operated animals remained apparently undisturbed throughout the experimental period. Within a few days, axonal sprouts issuing mainly from the terminal clubs of intraspinal nerve fibres severed by the grafting procedure were seen elongating and growing into--and presumably throughout--the nervous as well as the muscular and glandular transplants. The Schwann cells of these grafts, either sedentary or migrating towards the cord and intermingling with host reactive glial cells, appeared to guide the growth of the axonal sprouts they ensheathed (from day 3 to day 10) and generally myelinated (as early as day 6). Optic nerve transplants, lacking Schwann cells, were never reinnervated. Furthermore, in control microinjuries without grafting, limited growth of axonal sprouts was observed only when a few host Schwann cells were present. Mouse spinal neurons, therefore, demonstrate a marked capacity for regrowth when minimal damage to the spinal cord is associated with an adequate supply of Schwann cells. In contrast, host as well as transplanted glial cells, were unable, at least when they were not associated with Schwannian elements, to promote regenerative expression of these central neurons.","PeriodicalId":75532,"journal":{"name":"Archives d'anatomie microscopique et de morphologie experimentale","volume":"72 4","pages":"251-72"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17730933","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

[Quantitative and qualitative analysis of the effects of various doses of beta-irradiation (50-5000 rads) on epidermal cells of embryos and larvae of Pleurodeles waltlii Mich. (Amphibia, Urodela)]. 不同剂量(50-5000拉德)辐照对华氏侧耳胚和幼虫表皮细胞影响的定量和定性分析。(有尾类,两栖类)]。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

M Guyot-Lenfant, J P Labrousse, C L Gallien

引用次数: 0

Immunofluorescent localisation of somatostatin-like cells in the esophagus of a protochordate. 原脊索动物食道中生长抑素样细胞的免疫荧光定位。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

M Pestarino

引用次数: 0

[Cicatrization of the skin of the 7-day-old chick embryo cultured in vitro]. [体外培养7日龄鸡胚皮肤愈合]。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

A Thevenet

{"title":"[Cicatrization of the skin of the 7-day-old chick embryo cultured in vitro].","authors":"A Thevenet","doi":"","DOIUrl":"","url":null,"abstract":"A morphological study of in vitro wound healing has been performed by light, transmission and scanning electron microscopy in dorsal thoraco-lumbar skin of 7-day chick embryos. A circular wound, 750 microns in diameter, was punched out of dorsal skin, removing epidermis and the underlying dense dermis. Wound closure was completed within 96 to 120 hours. Feather bud development was not observed at the wound site. The epidermis began to migrate some 24 h after the wounding; the migration of peridermal cells preceded that of basal epidermal cells by some 12 hours. Mechanisms of the epidermal migration were similar to those observed in situ during wound healing of the integument in 5-day chick embryos (THEVENET, 1981), Superficial epithelization of bare dermis occurred as soon as 12 h after the injury. Cytoplasm of dermal cells exhibited many microtubules and a dilated rough endoplasmic reticulum. During the first 48 h, the epidermal cells established direct contacts and zones of close parallel apposition with epithelized dermal cell processes. The basement membrane lamina densa was maintained at the edges of the wound without retraction or ruffling. It was reconstituted concomitantly with the epidermal migration within 72 h. Cytoplasm of migratory epidermal and epithelized dermal cells exhibited many cytoskeleton structures.","PeriodicalId":75532,"journal":{"name":"Archives d'anatomie microscopique et de morphologie experimentale","volume":"72 1","pages":"23-46"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17693939","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

Tubulated bodies in teleost (Pimelodus maculatus) endothelial cells. 硬骨鱼内皮细胞的管状体。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

S Ferri, A Sesso

引用次数: 0

Effects of early hypophysectomy in the aging rat ovary. Ultrastructural study on regression and on delayed epithelial proliferation in the interstitial tissue. 早期垂体切除术对衰老大鼠卵巢的影响。间质组织退化和延迟上皮增生的超微结构研究。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

M Crumeyrolle-Arias, D Scheib

{"title":"Effects of early hypophysectomy in the aging rat ovary. Ultrastructural study on regression and on delayed epithelial proliferation in the interstitial tissue.","authors":"M Crumeyrolle-Arias, D Scheib","doi":"","DOIUrl":"","url":null,"abstract":"This report describes the fine structure of the \"wheel\" cells and of epithelial structures which both characterize the interstitial tissue of hypophysectomized and intact senescent rats. The regressive changes induced in normal ovarian interstitial cells of 25-26 day-old hypophysectomized rats were studied from 7 days to 15 months after the operation. They mainly consist in a rapid cytoplasmic dedifferentiation of these steroidogenic cells which, by one month after hypophysectomy, could be only identified by their specific nuclear pattern (\"wheel\" cells). Further changes of their organelles are only quantitative. These interstitial cells become perennial cells with no ultrastructural signs of senescence. In one year-old animals, the presence of both epithelial testis-like tubes and epithelial cellular cords provides evidence that these structures represent two different morphological arrangements for a similar cellular aspect. Unlike established \"wheel\" cells, these epithelial structures are evolutive and the thickening of their basement membrane can be considered as an age criterion. The follicular origin of the testis-like tubes and the complex formation of the cords are discussed in the light of our previous photonic study and compared with similar structures occurring in the senile rat ovary and in other situations.","PeriodicalId":75532,"journal":{"name":"Archives d'anatomie microscopique et de morphologie experimentale","volume":"72 2","pages":"117-31"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17706138","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

[Toxic and teratogenic effects of the ammonium salt of fosamine on the development of quail and chick embryos]. [亚硝胺铵盐对鹌鹑和鸡胚胎发育的毒性和致畸作用]。

Archives d'anatomie microscopique et de morphologie experimentale Pub Date : 1983-01-01

Y Lutz-Ostertag

引用次数: 0