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Hernandez-Verdu PD, Legrand C. Différentiation du trophoblaste au cours du développement in vitro d'embryon de Souris. Development 1971. [DOI: 10.1242/dev.25.2.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Differentiation of the trophoblast during in vitro development of the mouse embryo
Mouse embryos obtained at the presomitic stage develop in vitro up to 70 h. During the first 24 h development remains comparable in vitro and in utero. Afterwards, the chronology of embryonic development is modified and in our successful prolonged experiments (70 h culture), foetal organogenesis reaches a stage corresponding only to 1½ days in utero. In some instances a chorioallantoic circulation has been observed in the umbilical cord.
The three trophoblast cell types present in egg-cylinders at 8 days post coitum, develop in the same way in utero or in vitro. After 48 h culture electron microscopy shows that numerous annulate lamellae appear in the nuclei and in the cytoplasm of some of the giant cells. The syncytium does not differentiate between the trophoblast and the allantoic mesoderm. The haemo-trichorial placental barrier does not differentiate in vitro, although foetal capillaries form.
In vitro, the endoderm cells (from the splanchnopleure or from the omphalopleure) actively proliferate and form an homogeneous substance located between the giant and the polyhedric trophoblast cells.
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Hernandez-Verdun D, Legrand C. [Differentiation of the trophoblast during in vitro development of the mouse embryo]. JOURNAL OF EMBRYOLOGY AND EXPERIMENTAL MORPHOLOGY 1971; 25:175-87. [PMID: 5088018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Legrand C, Panigel M. [Ultrastructure of intravascular cells in uteroplacental spiral arteries at the beginning of gestation in the baboon, Papio cynocephalus]. COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L'ACADEMIE DES SCIENCES. SERIE D: SCIENCES NATURELLES 1971; 272:429-32. [PMID: 4995089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Legrand C. [Influence of hypothyroidism on growth in length and histological differentiation of the femur of the rat fetus at the end of the pregnancy]. ARCHIVES D'ANATOMIE MICROSCOPIQUE ET DE MORPHOLOGIE EXPERIMENTALE 1969; 58:291-310. [PMID: 5393878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Legrand C. [Ultrastructure of the endovascular trophoblast in the rat Mus norvegicus albinus]. COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L'ACADEMIE DES SCIENCES. SERIE D: SCIENCES NATURELLES 1969; 268:2095-7. [PMID: 4980350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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