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

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Acid-base balance in plasmatic, pericardial and peritoneal fluids in 2 species of amphibians. 2种两栖动物血浆、心包液和腹膜液的酸碱平衡。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-08-01
P Dejours, J Armand
{"title":"Acid-base balance in plasmatic, pericardial and peritoneal fluids in 2 species of amphibians.","authors":"P Dejours,&nbsp;J Armand","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The carbonic acid-base balance and the concentrations of Na and Cl were studied in 3 fluids, plasmatic, pericardial and peritoneal, sampled from 2 species of amphibians: Pleurodeles waltl and Xenopus laevis. In Pleurodeles the pericardial and peritoneal fluids are in a state of marked metabolic alkalosis, the carbonate alkalinity being up to 10 times higher in the serosal fluids than in the plasma, whereas PCO2's are very close in the 3 fluids. The Cl concentration is markedly lower in the serosal fluids than in the plasma. In Xenopus, the metabolic alkalosis of the serosal fluids also exists, but to a much lower extent than in Pleurodeles. These observations lead to further researches in the field of morphometry, physicochemistry and physiology.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 8","pages":"693-7"},"PeriodicalIF":0.0,"publicationDate":"1996-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19912688","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 dose rate on carcinogenesis after exposure of rats to low doses of neutron irradiation]. [剂量率对低剂量中子辐照大鼠致癌性的影响]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
M Morin, F Allin, S Altmeyer
{"title":"[Effects of dose rate on carcinogenesis after exposure of rats to low doses of neutron irradiation].","authors":"M Morin,&nbsp;F Allin,&nbsp;S Altmeyer","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In this experiment we compared the efficiency of fission neutrons of californium 252 at doses of 25 or 53 mGy in function of the dose rate. Two groups of male Sprague-Dawley rats were exposed at 100 or 420 days of age to fission neutrons with dose rates of 950 or 760 microGy/h for 26 or 33 h, and 2 other groups were irradiated over a year from 3 months to 15 months of age with dose rates of 3.58 or 7.72 microGy/h. The 4 groups of animals were compared with a control group of 501 rats. The reduction of effectiveness on cancer induction that we have previously shown at low dose rate with rats exposed to gamma rays or to alpha particles was not observed for low dose rate exposure with fission neutrons.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"633-6"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19972401","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
[I. The biology of unconventional, transmissible agents or prions]. [我。非传统的、可传播的媒介或朊病毒的生物学]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
D Dormont
{"title":"[I. The biology of unconventional, transmissible agents or prions].","authors":"D Dormont","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"549-53"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973061","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
T-type calcium current is expressed in dedifferentiated adult rat ventricular cells in primary culture. t型钙电流在原代培养的成年大鼠去分化心室细胞中表达。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
N Fares, J P Gomez, D Potreau
{"title":"T-type calcium current is expressed in dedifferentiated adult rat ventricular cells in primary culture.","authors":"N Fares,&nbsp;J P Gomez,&nbsp;D Potreau","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ventricular myocytes isolated from the heart of adult rats were able do dedifferentiate within 7 days in primary culture using a medium containing 10% fetal calf serum. Calcium current was recorded in these cells by means of the whole cell patch clamp technique and compared to the calcium current obtained in freshly isolated myocytes and in non dedifferentiated cultured myocytes. In dedifferentiated cardiomyocytes, both T-type (ICa-T) and L-type (ICa-L) calcium current components were recorded while only L-type was observed in freshly isolated and in non dedifferentiated cultured myocytes. ICa-T was separated from ICa-L through its voltage dependence and its pharmacology. These results demonstrate that ICa-T which has been shown to be present at the neonatal stage but absent in adult ventricular cells can be reexpressed when adult cells were dedifferentiated in culture. Its possible involvement in development of cardiac cells and in electrophysiological properties leading to spontaneous activity is discussed.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"569-76"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973064","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
[Ethyl 4-methyloctanoate, major component of male pherome in Oryctes rhinoceros (L.) (Coleoptera, Dynastidae)]. [4-甲基辛酸乙酯，角犀牛雄性信息素的主要成分[鞘翅目，朝科]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
J P Morin, D Rochat, C Malosse, M Lettere, R D de Chenon, H Wibwo, C Descoins
{"title":"[Ethyl 4-methyloctanoate, major component of male pherome in Oryctes rhinoceros (L.) (Coleoptera, Dynastidae)].","authors":"J P Morin,&nbsp;D Rochat,&nbsp;C Malosse,&nbsp;M Lettere,&nbsp;R D de Chenon,&nbsp;H Wibwo,&nbsp;C Descoins","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ethyl 4-methyloctanoate, which has already been described in Oryctes monoceros, has been identified, using extracts of effluvia collected from males, as being a major component of the male pheromone of O. rhinoceros. Field trials have been carried out in North Sumatra, Indonesia. Ethyl 4-methyloctanoate synthesized in the laboratory and released at 10 mg/d resulted in the capture of 6.8 insects per week per trap, whereas ethyl chrysanthemate (40 mg/d), an allelochemical compound once used as an attractant, only led to the capture of 0.3 insects, and the control none at all. The insects captured with the pheromone were 81% females, the majority being sexually mature. Discovery of this compound opens up new prospects for O. rhinoceros control.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"595-602"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973065","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
[C virus of Drosophila and dynamics of host population]. [果蝇C病毒与宿主种群动态]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
M Thomas-Orillard, S Legendre
{"title":"[C virus of Drosophila and dynamics of host population].","authors":"M Thomas-Orillard,&nbsp;S Legendre","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Drosophila melanogaster populations are naturally infected by the Drosophila C virus (DCV). Ingestion of this non-hereditary virus early in the life-cycle has a positive effect. Demographic parameters measured on DCV-free and DCV-infected populations of the same genotype enabled us to compute the population growth rates (multiplication rates) by means of matrix models. The DCV-infected sample had a larger growth rate both for low and high larval densities. Since it is not possible to experiment on a mixed population where DCV-free and DCV-infected individuals live together, a model combining competition and contamination was used. Simulations showed that coexistence of free and infected animals can occur. Such a result leads us to question the relation between population growth rate and fitness.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"615-21"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973066","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
[Reccurent abortions: unpublished syndrome suggesting the explanation of fetal death]. [反复流产:未发表的胎儿死亡综合征的解释]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
A P Netter, Y Boutaleb, J P Hallez, H N Minh, R Bessis, A E Lambert
{"title":"[Reccurent abortions: unpublished syndrome suggesting the explanation of fetal death].","authors":"A P Netter,&nbsp;Y Boutaleb,&nbsp;J P Hallez,&nbsp;H N Minh,&nbsp;R Bessis,&nbsp;A E Lambert","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A report is given of 8 cases of recurrent \"idiopathic\" abortions sharing in common the following features, unreported so far: (1) high uterine arterial impedance; (2) decrease in endometrial thickness, in spite of normal hormonal and endometrial cycle at biopsy; (3) a history of previous curettages. Such a syndrome could be consistent with the existence of a narrow peripheral symphysis of the uterine cavity, unaffecting its shape at hysterography.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"637-8"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19972402","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
[II. On current state of knowledge concerning bovine spongiform encephalopathy (mad cow disease)]. [II。关于牛海绵状脑病(疯牛病)的知识现状]。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
C Pilet
{"title":"[II. On current state of knowledge concerning bovine spongiform encephalopathy (mad cow disease)].","authors":"C Pilet","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"555-7"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973062","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
Structural organization, chromosomal localization, expression and phylogenetic evaluation of mouse glutathione peroxidase encoding genes. 小鼠谷胱甘肽过氧化物酶编码基因的结构组织、染色体定位、表达及系统发育评价。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
J P Dufaure, J J Lareyre, V Schwaab, M G Mattei, J R Drevet
{"title":"Structural organization, chromosomal localization, expression and phylogenetic evaluation of mouse glutathione peroxidase encoding genes.","authors":"J P Dufaure,&nbsp;J J Lareyre,&nbsp;V Schwaab,&nbsp;M G Mattei,&nbsp;J R Drevet","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We have reported earlier the cloning and the chromosomal localization of 2 GPX-encoding sequences expressed differentially within the mouse epididymis, gpx5 and gpx3. Here, we have mapped on the mouse chromosomes the third known murine GPX-encoding gene, the cytosolic GPX or gpx1. We have compared the degree of identity of the 3 GPX proteins, the respective organization of the 3 corresponding single copy genes and, using degenerated oligonucleotides designed in highly conserved domains of the proteins, we have analyzed the expression of GPX-encoding genes in the mouse epididymis as well as in control tissues known to express GPX proteins (the liver for GPX1 and the kidney for GPX3). The 3 genes characterized to date were found expressed in each of the tissues tested but in a highly tissue-restricted manner. Nucleotidic sequences comparisons were carried out on GPX-encoding sequences from various species and were used to draw a dendrogram. Phylogenetic evaluation of the sequence information, as well as the chromosomal localizations, suggest that the GPX genes have evolved by duplication events followed by random insertions from a single ancestral gene.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"559-68"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973063","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
Cerebrospinal fluid metabolic profiles in multiple sclerosis and degenerative dementias obtained by high resolution proton magnetic resonance spectroscopy. 通过高分辨率质子磁共振波谱获得多发性硬化症和退行性痴呆的脑脊液代谢谱。
Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie Pub Date : 1996-07-01
F Nicoli, J Vion-Dury, S Confort-Gouny, S Maillet, J L Gastaut, P J Cozzone
{"title":"Cerebrospinal fluid metabolic profiles in multiple sclerosis and degenerative dementias obtained by high resolution proton magnetic resonance spectroscopy.","authors":"F Nicoli,&nbsp;J Vion-Dury,&nbsp;S Confort-Gouny,&nbsp;S Maillet,&nbsp;J L Gastaut,&nbsp;P J Cozzone","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We have analyzed the cerebrospinal fluid (CSF) of 19 patients with multiple sclerosis (MS), 12 patients with degenerative dementia and 17 control patients using in vitro high resolution proton magnetic resonance spectroscopy (MRS) at 400 MHz. The CSF metabolic profile is slightly modified in MS patients (increased lactate and fructose concentrations, decreased creatinine and phenylalanine concentrations) and is not correlated with the intensity of the intrathecal inflammation. Proton MRS of CSF does not differentiate relapsing-remitting MS and primary progressive MS. We have not detected any specific abnormal resonance in native or lyophilized CSF. The CSF metabolic profile of demented patients is much more altered (increased concentration of lactate, pyruvate, alanine, lysine, valine, leucine-isoleucine, tyrosine, glutamine) and is in agreement with a brain oxidative metabolism impairment as already described in Alzheimer's disease. Unassigned abnormal but non specific or constant resonances have been detected on MR spectra of demented patients. CSF inositol concentration is also increased in the CSF of patients with Alzheimer's disease. In vitro high resolution proton MRS of the CSF constitutes a new and original way to explore CSF for the differential and/or early diagnosis of dementias, as a complement to in vivo proton cerebral MRS.</p>","PeriodicalId":10555,"journal":{"name":"Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie","volume":"319 7","pages":"623-31"},"PeriodicalIF":0.0,"publicationDate":"1996-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19973067","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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