Culture media which contain either substances that can induce meiosis (meiosis-inducing substances, MIS) or prevent meiosis (meiosis-preventing substances, MPS) can be obtained from different experiments. MIS is present in culture media in which tissues of ovaries with germ cells in meiosis, or fetal epididymis, or puberal epididymis and testes, have grown. MIS is apparently species-nonspecific since media containing MIS obtained from puberal bulls induce meiosis in indifferent fetal mouse testes. MPS is secreted into the culture media of minced fetal mouse testes. Meiosis si prevented or greatly inhibited in fetal mouse ovaries, when they are cultured in such media. It was concluded that MIS was present in mesonephric derived tissues in gonads in which meiosis occurred. Moreover, MPS within the testicular tissue (within the testicular cords ?) might participate in preventing meiosis in the fetal testis. However, a negative « MIS-activity-test » result was obtained in an experiment with rabbit gonads : meiosis was not induced in fetal gonads by infant ovarian tissue containing germ cells in meiosis. This led to comparative investigations of gonads from species in which the onset of meiosis and gonadal sex differentiation coincide in time, « simultaneous meiosis », and those, like the rabbit, in which the onset of meiosis in the female is delayed,
{"title":"Regulation of meiosis in mammals","authors":"A. Byskov","doi":"10.1051/RND:19790809","DOIUrl":"https://doi.org/10.1051/RND:19790809","url":null,"abstract":"Culture media which contain either substances that can induce meiosis (meiosis-inducing substances, MIS) or prevent meiosis (meiosis-preventing substances, MPS) can be obtained from different experiments. MIS is present in culture media in which tissues of ovaries with germ cells in meiosis, or fetal epididymis, or puberal epididymis and testes, have grown. MIS is apparently species-nonspecific since media containing MIS obtained from puberal bulls induce meiosis in indifferent fetal mouse testes. MPS is secreted into the culture media of minced fetal mouse testes. Meiosis si prevented or greatly inhibited in fetal mouse ovaries, when they are cultured in such media. It was concluded that MIS was present in mesonephric derived tissues in gonads in which meiosis occurred. Moreover, MPS within the testicular tissue (within the testicular cords ?) might participate in preventing meiosis in the fetal testis. However, a negative « MIS-activity-test » result was obtained in an experiment with rabbit gonads : meiosis was not induced in fetal gonads by infant ovarian tissue containing germ cells in meiosis. This led to comparative investigations of gonads from species in which the onset of meiosis and gonadal sex differentiation coincide in time, « simultaneous meiosis », and those, like the rabbit, in which the onset of meiosis in the female is delayed,","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"2 1","pages":"1251-1261"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89520699","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}
{"title":"L'organe pinéal du Brochet (Esox lucius, L.). I. Etude anatomique et cytologique","authors":"J. Falcon","doi":"10.1051/RND:19790313","DOIUrl":"https://doi.org/10.1051/RND:19790313","url":null,"abstract":"","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"30 1","pages":"445-465"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85294437","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}
rone (AFT) and maternal peripheral plasma testosterone were radioimmunologically assayed. (1) In 57-day male fetuses, UAPT level was 3 to 4 ng/mi ; it dropped to 0.5 to 1 ng/ml near 75 days and stayed at that level until term. This content in female fetuses remained at about 1 ng/mi throughout gestation (fig. 1). (2) During the second-half of gestation, UVPT content was generally lower than UAPT content, whatever the fetal sex (table 1). (3) AFT level was clearly lower than UAPT or UVPT level ; it stayed under the sensitivity limit of the assay method in most of the female fetuses. The AFT concentration curve in male fetuses was parallel to that of UAPT (fig. 2). The correlation coefficient (r = 0.71) (fig. 3), together with the relatively large quantities of AFT in 37 to 50-day male fetuses, suggested that the fetal testis could secrete testosterone at a very early stage when the Leydig cells were not yet recognizable. (4) There was no relation between maternal testosteronemia and the sex of the conceptus at any time during gestation (fig. 4).
{"title":"Testosterone levels in umbilical cord blood, maternal peripheral plasma and amniotic fluid of the crab-eating monkey (Macaca fascicularis)","authors":"D. Dang, N. Meusy‐Dessolle","doi":"10.1051/RND:19790815","DOIUrl":"https://doi.org/10.1051/RND:19790815","url":null,"abstract":"rone (AFT) and maternal peripheral plasma testosterone were radioimmunologically assayed. (1) In 57-day male fetuses, UAPT level was 3 to 4 ng/mi ; it dropped to 0.5 to 1 ng/ml near 75 days and stayed at that level until term. This content in female fetuses remained at about 1 ng/mi throughout gestation (fig. 1). (2) During the second-half of gestation, UVPT content was generally lower than UAPT content, whatever the fetal sex (table 1). (3) AFT level was clearly lower than UAPT or UVPT level ; it stayed under the sensitivity limit of the assay method in most of the female fetuses. The AFT concentration curve in male fetuses was parallel to that of UAPT (fig. 2). The correlation coefficient (r = 0.71) (fig. 3), together with the relatively large quantities of AFT in 37 to 50-day male fetuses, suggested that the fetal testis could secrete testosterone at a very early stage when the Leydig cells were not yet recognizable. (4) There was no relation between maternal testosteronemia and the sex of the conceptus at any time during gestation (fig. 4).","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"06 1","pages":"1307-1316"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85984396","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}
{"title":"Ontogeny of responsiveness to gonadotrophins and prostaglandin E in the neonatal rat ovary","authors":"S. Lamprecht, B. Funkenstein, A. Nimrod","doi":"10.1051/RND:19790819","DOIUrl":"https://doi.org/10.1051/RND:19790819","url":null,"abstract":"","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"43 1","pages":"1351-1361"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79449911","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}
Summary. As in normal animals, the Sertoli cell population in pubescent pigs was composed of two morphological cell types : numerous cells with a light nucleus (type A) and some small cells with a dark nucleus (type B). This report studies the transformations occurring in this population during the 4 months following hypophysectomy. The various cellular components had different rhythms of modification ; no general, continuous involution of the components was observed. The nucleolar complex appearing in the nucleus was composed of three elements and persisted during the whole period studied. The majo-rity of A-cell cytoplasmic components disappeared during the post-operative period, except for some lysosomes which developed and the Golgi apparatus which persisted. The cellular junctions between Sertoli cells and those facing the remaining germ cells were unmodified. Three or 4 months after hypophysectomy, the whole of the membranous and ribosomal systems was reorganized and developed. Microtubules and microfilaments gradually disappeared. In some cases the specialized inter-Sertoli cell junctions lost their microfilamentary component. The B-cells had an extremely condensed aspect 1 month after hypophysectomy. Three or 4 months after the operation, cytoplasmic ramifications and the presence of numerous ribosomes apparently indicated a change in B-cell metabolism. The microfilaments disappeared gradually. In both cell types, the large lipid droplet persisted ; it was always found against the nucleus and often in a basal position.
{"title":"Sertoli cell ultrastructure. II. Morphological effects of hypophysectomy in pubescent pigs","authors":"M. Chevalier","doi":"10.1051/RND:19790504","DOIUrl":"https://doi.org/10.1051/RND:19790504","url":null,"abstract":"Summary. As in normal animals, the Sertoli cell population in pubescent pigs was composed of two morphological cell types : numerous cells with a light nucleus (type A) and some small cells with a dark nucleus (type B). This report studies the transformations occurring in this population during the 4 months following hypophysectomy. The various cellular components had different rhythms of modification ; no general, continuous involution of the components was observed. The nucleolar complex appearing in the nucleus was composed of three elements and persisted during the whole period studied. The majo-rity of A-cell cytoplasmic components disappeared during the post-operative period, except for some lysosomes which developed and the Golgi apparatus which persisted. The cellular junctions between Sertoli cells and those facing the remaining germ cells were unmodified. Three or 4 months after hypophysectomy, the whole of the membranous and ribosomal systems was reorganized and developed. Microtubules and microfilaments gradually disappeared. In some cases the specialized inter-Sertoli cell junctions lost their microfilamentary component. The B-cells had an extremely condensed aspect 1 month after hypophysectomy. Three or 4 months after the operation, cytoplasmic ramifications and the presence of numerous ribosomes apparently indicated a change in B-cell metabolism. The microfilaments disappeared gradually. In both cell types, the large lipid droplet persisted ; it was always found against the nucleus and often in a basal position.","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"62 1","pages":"583-596"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90466186","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}
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Colostrum de vache : composition minérale et activité de la phosphatase alcaline G. Linden, B. Maraval
{"title":"Colostrum de vache : composition minrale et activit de la phosphatase alcaline","authors":"G. Linden, B. Maraval","doi":"10.1051/RND:19790302","DOIUrl":"https://doi.org/10.1051/RND:19790302","url":null,"abstract":"HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Colostrum de vache : composition minérale et activité de la phosphatase alcaline G. Linden, B. Maraval","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80819632","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}
{"title":"Influence d'une élévation de température sur l'évolution de l'aminoacidémie et de l'ammoniémie après le repas chez la truite arc en ciel (Salmo gairdneri R.)","authors":"B. Fauconneau, P. Luquet","doi":"10.1051/RND:19790708","DOIUrl":"https://doi.org/10.1051/RND:19790708","url":null,"abstract":"","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"66 1","pages":"1063-1079"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77960446","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}
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Les cycles alimentaires des Vipères européennes dans des conditions semi-naturelles H. Saint-Girons
{"title":"Les cycles alimentaires des Vipères européennes dans des conditions semi-naturelles","authors":"H. Saint-Girons","doi":"10.1051/RND:19790111","DOIUrl":"https://doi.org/10.1051/RND:19790111","url":null,"abstract":"HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Les cycles alimentaires des Vipères européennes dans des conditions semi-naturelles H. Saint-Girons","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"35 1","pages":"125-134"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85626232","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}
{"title":"Dosage des strognes libres et conjugus dans le plasma priphrique de vache cyclique","authors":"A. López-Sebastián, J. De","doi":"10.1051/RND:19791006","DOIUrl":"https://doi.org/10.1051/RND:19791006","url":null,"abstract":"","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80841266","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}
J. Grizard, P. Patureau-Mirand, M. Tissier, O. Bernard, G. Bayle, A. Brelurut, J. Leroux
This 2 x 2 factorial experiment (table 1) was carried out in the autumn on 22 Limousine ewes during pregnancy and lactation. The animals bore or were suckling twins. The experimental treatments included 2 levels of energy intake during 7 weeks prepartum (high : H ; low : B) and 2 states of body reserves at 8 weeks prepartum (fat : G ; lean : M). Jugular blood samples were taken from ewes at 34, 20 and 6 days prepartum, and from lambs at lambing and at 6 hrs., 24 hrs., 12 days and 24 days after lambing. Blood glucose, urea and free amino acids and plasma insulin were recorded. Reducing dietary energy supply did not change lamb birth weight in autumn (fig. 1 A). It contrasted with a large diminution in the spring (Grizard et al., 1979a, b). There was a decrease of glucose and of some non-essential free amino acids (alanine, glutamate, proline, citrulline) in the blood of the ewes. Most of the non-essential free amino acids decreased during the first day of life in the blood of lambs (fig. 2A). Reducing body reserves resulted in an increase of glucose and glutamine but in a decrease of some other free amino acids (glutamate, ornithine, histidine) in the blood of ewes (fig. 1 B). It increased daily weight gain during the first 3 weeks of life in lambs (fig. 2B). At the beginning of life, plasma insulin in lambs seemed to be related to birthweight and to blood glucose in the mothers.
{"title":"Influence du niveau des apports énergétiques pendant la fin de la gestation sur l'insulinémie et l'aminoacidémie des brebis et de leurs agneaux","authors":"J. Grizard, P. Patureau-Mirand, M. Tissier, O. Bernard, G. Bayle, A. Brelurut, J. Leroux","doi":"10.1051/RND:19790207","DOIUrl":"https://doi.org/10.1051/RND:19790207","url":null,"abstract":"This 2 x 2 factorial experiment (table 1) was carried out in the autumn on 22 Limousine ewes during pregnancy and lactation. The animals bore or were suckling twins. The experimental treatments included 2 levels of energy intake during 7 weeks prepartum (high : H ; low : B) and 2 states of body reserves at 8 weeks prepartum (fat : G ; lean : M). Jugular blood samples were taken from ewes at 34, 20 and 6 days prepartum, and from lambs at lambing and at 6 hrs., 24 hrs., 12 days and 24 days after lambing. Blood glucose, urea and free amino acids and plasma insulin were recorded. Reducing dietary energy supply did not change lamb birth weight in autumn (fig. 1 A). It contrasted with a large diminution in the spring (Grizard et al., 1979a, b). There was a decrease of glucose and of some non-essential free amino acids (alanine, glutamate, proline, citrulline) in the blood of the ewes. Most of the non-essential free amino acids decreased during the first day of life in the blood of lambs (fig. 2A). Reducing body reserves resulted in an increase of glucose and glutamine but in a decrease of some other free amino acids (glutamate, ornithine, histidine) in the blood of ewes (fig. 1 B). It increased daily weight gain during the first 3 weeks of life in lambs (fig. 2B). At the beginning of life, plasma insulin in lambs seemed to be related to birthweight and to blood glucose in the mothers.","PeriodicalId":7885,"journal":{"name":"Annales De Biologie Animale Biochimie Biophysique","volume":"11 1","pages":"199-205"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85793914","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}
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