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Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie最新文献

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[Modulation of Leydig cell activity by Sertoli cell: an in vitro study]. [支持细胞对间质细胞活性的调节:体外研究]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-17
J Reventos, M Benahmed, E Tabone, J M Saez
{"title":"[Modulation of Leydig cell activity by Sertoli cell: an in vitro study].","authors":"J Reventos,&nbsp;M Benahmed,&nbsp;E Tabone,&nbsp;J M Saez","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In vivo studies indicate that FSH can modulate Leydig cells steroidogenic activity. However, in the testis only Sertoli cells contain specific FSH receptors. In order to clarify the mechanism by which FSH exerts this effect on testicular steroidogenesis, purified Pig Leydig and Sertoli cells were cultured alone or in co-culture. Leydig cell activity has been evaluated by two parameters: 1. hCG-stimulated testosterone secretion. 2. LH/hCG binding sites. FSH does not stimulate these two parameters of purified Leydig cells when cultured alone. On the other hand, when Leydig cells are co-cultured with Sertoli cells, FSH significantly increases these two parameters of Leydig cell function. These results suggest that the effect of FSH on Leydig cells is not direct but mediated by Sertoli cells.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 2","pages":"123-6"},"PeriodicalIF":0.0,"publicationDate":"1983-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17363286","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
[Effect of temperature on the hemagglutinating activity of peanut lectin]. [温度对花生凝集素血凝活性的影响]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-17
M Caron, A Faure
{"title":"[Effect of temperature on the hemagglutinating activity of peanut lectin].","authors":"M Caron,&nbsp;A Faure","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 2","pages":"115-8"},"PeriodicalIF":0.0,"publicationDate":"1983-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17464305","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
[Characteristics of testosterone binding to plasma proteins during the sexual cycle in a seasonally-reproductive animal, the male viviparous lizard]. [季节性繁殖动物(雄性胎生蜥蜴)性周期中睾酮与血浆蛋白结合的特征]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
J P Braux, J P Dufaure
{"title":"[Characteristics of testosterone binding to plasma proteins during the sexual cycle in a seasonally-reproductive animal, the male viviparous lizard].","authors":"J P Braux,&nbsp;J P Dufaure","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Plasma testosterone binding activity was determined by an equilibrium dialysis method in the male of Lacerta vivipara during the annual cycle of activity (from March to September). Capacity showed significant variations during the sexual cycle although affinity remained constant. The variations of capacity were then compared with plasma testosterone levels measured by radioimmunoassay and plasma proteins content measured by the Lowry method. The three parameters showed parallel seasonal evolution except in May-June when binding activity increased although plasma testosterone and protein levels fell. The physiological meaning of this conspicuous phenomenon is discussed=an active mechanism of strengthening of the atrophy of accessory sexual organs is hypothesized. Furthermore, the increase of the binding activity which occurs in autumn and is parallel to the levels of testosterone must prevent these accessory organs from a full resumption of activity before the retreat since the lizard is a hibernating animal. These results emphasize the key role played by specific plasma binding proteins in the modulation of steroid hormone action.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"59-62"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17463640","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
[Free and peptide amino acid composition in the seminal fluid of the carp (Cyprinus carpio)]. [鲤鱼精液中的游离氨基酸和多肽氨基酸组成]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
Y Menezo, M G Plouidy, R Billard
{"title":"[Free and peptide amino acid composition in the seminal fluid of the carp (Cyprinus carpio)].","authors":"Y Menezo,&nbsp;M G Plouidy,&nbsp;R Billard","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Free and peptidic amino acids were measured in the seminal plasma of carp. Some acids such as glutamic acid and glutamine, taurine, glycine and proline were exceptionally abundant, while others like lysine, arginine and histidine were found in small amounts. Generally, the amino acid level was higher in carp seminal plasma than in that of other Vertebrate species. As this level was systematically higher than in the blood plasma, it is supposed that there was neoformation of an original fluid in the genital tract.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"67-70"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17464302","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
[Presence of high-affinity binding sites for thyroliberin in human pituitary adenomas secreting prolactin]. [在分泌催乳素的人垂体腺瘤中存在甲状腺素高亲和力结合位点]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
M Le Dafniet, A M Brandi, D Bression, J Racadot, F Peillon
{"title":"[Presence of high-affinity binding sites for thyroliberin in human pituitary adenomas secreting prolactin].","authors":"M Le Dafniet,&nbsp;A M Brandi,&nbsp;D Bression,&nbsp;J Racadot,&nbsp;F Peillon","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Specific high affinity binding sites for thyrotropin-releasing hormone (TRH) were demonstrated on cellular membranes from human prolactin-secreting adenomas in spite of the lack of in vivo prolactin response to TRH. One binding site was characterized. The mean value for the Kd from four adenomas was 64.8 +/- 12.5 nM. The maximal number of binding sites varied from one adenoma to another (from 80 to 450 fmoles/mg membrane proteins).</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"43-6"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17363285","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
[Inhibition of the uterine binding of estrogens by unsaturated fatty acids in immature female rats]. [不饱和脂肪酸对未成熟雌性大鼠子宫雌激素结合的抑制作用]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
F Clerc-Hofmann, G Vallette, C Secco-Millet, N Christeff, C Benassayag, E A Nunez
{"title":"[Inhibition of the uterine binding of estrogens by unsaturated fatty acids in immature female rats].","authors":"F Clerc-Hofmann,&nbsp;G Vallette,&nbsp;C Secco-Millet,&nbsp;N Christeff,&nbsp;C Benassayag,&nbsp;E A Nunez","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We demonstrate that the interactions between the uterine cytosol proteins of 24 day old Rats and estradiol-17 beta (E2) are significantly influenced by physiological concentrations of non esterified fatty acids (2. 10(-4)M). We show that the specific binding of the hormone to the 8S uterine receptor, is markedly inhibited (50-80%) by the unsaturated fatty acids. The observed inhibition is a function both of acid dose and acid unsaturation degree. The polyunsaturated arachidonic and docosahexaenoic acids are the strongest inhibitors, whereas the saturated palmitic and stearic acids do not displace the E2 from the 8S receptor.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"53-8"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17463639","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
[Permeability to strontium ions and excitation-contraction coupling in skeletal muscle of frogs]. [青蛙骨骼肌对锶离子的渗透性和兴奋-收缩耦合]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
C Cognard, G Raymond
{"title":"[Permeability to strontium ions and excitation-contraction coupling in skeletal muscle of frogs].","authors":"C Cognard,&nbsp;G Raymond","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Electrical and mechanical activities of frog skeletal muscle fibres were simultaneously investigated under conditions which allow the development of a strontium permeability. It was shown that the contraction elicited by a long lasting Sr response depends upon two mechanisms: a potential dependent one, and a mechanism which is related to the entry of Sr ions into the cell through the tubular membrane.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"71-6"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17464304","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
[Serum potentiation of hemolysis induced in vitro by adriamycin in man]. [阿霉素对人体外溶血的血清增强作用]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
J Y Follézou, M Bizon, J Gicquel
{"title":"[Serum potentiation of hemolysis induced in vitro by adriamycin in man].","authors":"J Y Follézou,&nbsp;M Bizon,&nbsp;J Gicquel","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Human red cells lysis produced by adriamycin in vitro was investigated both in phosphate medium pH7 and in human serum. Drug induced hemolysis, that appeared with concentrations markedly above plasmatic levels seen in therapeutic, was stongly enhanced by serum. It is the first relations of modulation through a human serum factor of a biological action of adriamycin.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"25-8"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17463636","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
[Study of the transfer of immunostimulation from the mother to the young mouse using 2 immunostimulants and the PFC test]. [使用2种免疫刺激剂和PFC试验从母鼠向幼鼠传递免疫刺激的研究]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
F Gendre, B Huart, P Binder, P Deschaux, R Fontanges
{"title":"[Study of the transfer of immunostimulation from the mother to the young mouse using 2 immunostimulants and the PFC test].","authors":"F Gendre,&nbsp;B Huart,&nbsp;P Binder,&nbsp;P Deschaux,&nbsp;R Fontanges","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Pregnant Mice were stimulated with two substances, an antibronchitic lysate (LAB) and diethyldithiocarbamate (DTC). PFC response was studied in mothers and their offspring for 6 weeks after birth. An increase in PFC response was noted in the immunostimulated adult Mice. In the newborn Mice, the number of PFC increased between the 1st and 6th week. In comparison with controls, PFC response appeared later in the newborns to LAB-stimulated mothers and earlier in those to DTC-stimulated mothers.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"15-8"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17463635","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
[Demonstration of pulsatile secretion of somatostatin in the third cerebral ventricle of unanesthetized rats]. [未麻醉大鼠第三脑室生长抑素脉动性分泌的证明]。
Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1983-01-10
S Arancibia, J Epelbaum, G Alonso, I Assenmacher
{"title":"[Demonstration of pulsatile secretion of somatostatin in the third cerebral ventricle of unanesthetized rats].","authors":"S Arancibia,&nbsp;J Epelbaum,&nbsp;G Alonso,&nbsp;I Assenmacher","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Using a specially designed push-pull cannula stereotaxically implanted into the 3rd ventricle, a pulsatile secretion of IR-SRIF with a circhoral periodicity was detected in male rats. At 30 min. to 1 h 1/2 intervals the secretion rate of the neuropeptide rose from a baseline rate of 14.5 +/- 0.5 pg/10 min., corresponding to a baseline concentration of 60 +/- 2 pg/ml to peaks of 50 +/- 5 pg/10 min. or 210 +/- 22 pg/ml, respectively. This pulsatile pattern was restricted to rats where histological examination showed no dilation pictures of the ventricle. The possible origin and function of intra-ventricular IR-SRIF are discussed.</p>","PeriodicalId":10622,"journal":{"name":"Comptes rendus des seances de l'Academie des sciences. Serie III, Sciences de la vie","volume":"296 1","pages":"47-52"},"PeriodicalIF":0.0,"publicationDate":"1983-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17199064","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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