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  • Animals  (5)
  • American Association for the Advancement of Science (AAAS)  (5)
  • 1995-1999  (3)
  • 1985-1989  (2)
  • 1
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    Early neocortical regionalization in the absence of thalamic innervation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-08-07
    Description: There is a long-standing controversy regarding the mechanisms that generate the functional subdivisions of the cerebral neocortex. One model proposes that thalamic axonal input specifies these subdivisions; the competing model postulates that patterning mechanisms intrinsic to the dorsal telencephalon generate neocortical regions. Gbx-2 mutant mice, whose thalamic differentiation is disrupted, were investigated. Despite the lack of cortical innervation by thalamic axons, neocortical region-specific gene expression (Cadherin-6, EphA-7, Id-2, and RZR-beta) developed normally. This provides evidence that patterning mechanisms intrinsic to the neocortex specify the basic organization of its functional subdivisions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miyashita-Lin, E M -- Hevner, R -- Wassarman, K M -- Martinez, S -- Rubenstein, J L -- NS34661-01A1/NS/NINDS NIH HHS/ -- R01 MH49428-01/MH/NIMH NIH HHS/ -- R01 MH51561-01A1/MH/NIMH NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Aug 6;285(5429):906-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nina Ireland Laboratory of Developmental Neurobiology, Department of Psychiatry, School of Medicine, University of California San Francisco, San Francisco, CA 94143-0984, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10436162" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/chemistry/*physiology ; Cadherins/genetics ; Calbindin 2 ; Carbocyanines ; DNA-Binding Proteins/genetics ; Gene Expression ; Homeodomain Proteins/genetics/physiology ; Immunohistochemistry ; In Situ Hybridization ; Inhibitor of Differentiation Proteins ; Lymphoid Enhancer-Binding Factor 1 ; Mice ; Mutation ; Neocortex/anatomy & histology/*embryology/growth & development/metabolism ; Nerve Fibers/physiology/ultrastructure ; Proteins/genetics ; Receptors, Cell Surface/genetics ; Receptors, Cytoplasmic and Nuclear/genetics ; Receptors, Melatonin ; S100 Calcium Binding Protein G/analysis ; Steroid 17-alpha-Hydroxylase/analysis ; Telencephalon/embryology/growth & development/physiology ; Thalamus/anatomy & histology/*embryology/growth & development/metabolism ; Transcription Factors/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Physiological constraint on feeding behavior: intestinal membrane disaccharidases of the starling (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-02-10
    Description: Animals clearly choose what they eat and can even choose among chemically different sugars. The physiological and biochemical mechanisms that constrain feeding choices are largely unknown. In this study, European starlings (Sturnus vulgaris) preferred mixture solutions of D-glucose plus D-fructose to equimolar (double molar caloric value) solutions of sucrose. Intubation feeding of sucrose did not increase blood glucose levels. Sucrose is a useless energy source for these birds because they lack a single digestive enzyme (sucrase) on the small intestinal brush border membrane. However, the membranes possessed separate maltase and isomaltase disaccharidases. This expression pattern and expression patterns of membrane disaccharidases among mammals suggest a role for intestinal enzymes in the coevolutionary interactions between vertebrates and their plant food sources.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martinez del Rio, C -- Stevens, B R -- DK-38715/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1989 Feb 10;243(4892):794-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Florida, Gainesville 32611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2916126" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Birds/*physiology ; Disaccharidases/physiology ; Disaccharides/metabolism ; Feeding Behavior/*physiology ; Intestinal Mucosa/enzymology ; Intestines/*physiology ; Microvilli/enzymology ; Sucrase/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Size variation in Middle Pleistocene humans (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-08-22
    Description: It has been suggested that European Middle Pleistocene humans, Neandertals, and prehistoric modern humans had a greater sexual dimorphism than modern humans. Analysis of body size variation and cranial capacity variation in the large sample from the Sima de los Huesos site in Spain showed instead that the sexual dimorphism is comparable in Middle Pleistocene and modern populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arsuaga, J L -- Carretero, J M -- Lorenzo, C -- Gracia, A -- Martinez, I -- Bermudez de Castro, J M -- Carbonell, E -- New York, N.Y. -- Science. 1997 Aug 22;277(5329):1086-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departamento de Paleontologia, Instituto de Geologia Economica, Facultad de Ciencias Geologicas, Universidad Complutense de Madrid, Ciudad Universitaria 28040 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9262474" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Body Constitution ; Female ; *Fossils ; Hominidae/*anatomy & histology ; Humans ; Male ; *Sex Characteristics ; Skull/*anatomy & histology ; Spain
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    A hominid from the lower Pleistocene of Atapuerca, Spain: possible ancestor to Neandertals and modern humans (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-30
    Description: Human fossil remains recovered from the TD6 level (Aurora stratum) of the lower Pleistocene cave site of Gran Dolina, Sierra de Atapuerca, Spain, exhibit a unique combination of cranial, mandibular, and dental traits and are suggested as a new species of Homo-H. antecessor sp. nov. The fully modern midfacial morphology of the fossils antedates other evidence of this feature by about 650, 000 years. The midfacial and subnasal morphology of modern humans may be a retention of a juvenile pattern that was not yet present in H. ergaster. Homo antecessor may represent the last common ancestor for Neandertals and modern humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bermudez de Castro, J M -- Arsuaga, J L -- Carbonell, E -- Rosas, A -- Martinez, I -- Mosquera, M -- New York, N.Y. -- Science. 1997 May 30;276(5317):1392-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Museo Nacional de Ciencias Naturales, Consejo Superior de Investigaciones Cientificas (CSIC), Departamento de Paleobiologia, J. Gutierrez Abascal 2, 28006 Madrid, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9162001" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Child ; Dentition ; Facial Bones ; *Fossils ; *Hominidae/classification ; Humans ; Mandible ; Skull ; Spain
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Neuronal pp60c-src contains a six-amino acid insertion relative to its non-neuronal counterpart (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-07-24
    Description: Neuronal cells express a pp60c-src variant that displays an altered electrophoretic mobility and a different V8 peptide pattern relative to pp60c-src expressed in tissues of non-neuronal origin. To determine whether the neuronal form of pp60c-src is encoded by a brain-specific messenger RNA, a mouse brain complementary DNA (cDNA) library was screened with a chicken c-src probe and a 3.8-kilobase c-src cDNA clone was isolated. This clone encodes a 60-kilodalton protein that differs from chicken or human pp60c-src primarily in having six extra amino acids (Arg-Lys-Val-Asp-Val-Arg) within the NH2-terminal 16 kilodaltons of the molecule. S1 nuclease protection analysis confirmed that brain c-src RNA contains an 18-nucleotide insertion at the position of the extra six amino acids. This insertion occurs at a position that corresponds to a splice junction in the chicken and human c-src genes. The isolated c-src cDNA clone encodes a protein that displays an identical V8 peptide pattern to that observed in pp60c-src isolated from tissues of neuronal origin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martinez, R -- Mathey-Prevot, B -- Bernards, A -- Baltimore, D -- P0I CA38497/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1987 Jul 24;237(4813):411-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2440106" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Brain/enzymology ; Chickens ; Cloning, Molecular ; DNA/metabolism ; DNA Restriction Enzymes ; DNA Transposable Elements ; Humans ; Isoenzymes/*genetics ; Mice ; Neurons/*enzymology ; Protein Kinases/*genetics ; Proto-Oncogene Proteins/*genetics ; Proto-Oncogene Proteins pp60(c-src) ; Sequence Homology, Nucleic Acid ; Species Specificity
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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