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  • 1
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    Regulation of lymphoid-specific immunoglobulin mu heavy chain gene enhancer by ETS-domain proteins (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-07-02
    Description: The enhancer for the immunoglobulin mu heavy chain gene (IgH) activates a heterologous gene at the pre-B cell stage of B lymphocyte differentiation. A lymphoid-specific element, microB, is necessary for enhancer function in pre-B cells. A microB binding protein is encoded by the PU.1/Spi-1 proto-oncogene. Another sequence element, microA, was identified in the mu enhancer that binds the product of the ets-1 proto-oncogene. The microA motif was required for microB-dependent enhancer activity, which suggests that a minimal B cell-specific enhancer is composed of both the PU.1 and Ets-1 binding sites. Co-expression of both PU.1 and Ets-1 in nonlymphoid cells trans-activated reporter plasmids that contained the minimal mu enhancer. These results implicate two members of the Ets family in the activation of IgH gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelsen, B -- Tian, G -- Erman, B -- Gregoire, J -- Maki, R -- Graves, B -- Sen, R -- 1K04GM00563/GM/NIGMS NIH HHS/ -- GM38663/GM/NIGMS NIH HHS/ -- GM38925/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1993 Jul 2;261(5117):82-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rosenstiel Research Center, Brandeis University, Waltham, MA 02254.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8316859" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/cytology/*metabolism ; Base Sequence ; Binding Sites ; Cell Differentiation ; Cell Line ; DNA-Binding Proteins/*genetics/metabolism ; *Enhancer Elements, Genetic ; Female ; Genes, Immunoglobulin ; Humans ; Immunoglobulin mu-Chains/*genetics ; Molecular Sequence Data ; Mutation ; Proto-Oncogene Protein c-ets-1 ; Proto-Oncogene Proteins/*genetics/metabolism ; Proto-Oncogene Proteins c-ets ; Retroviridae Proteins, Oncogenic ; Transcription Factors/*genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Maternal rescue of transforming growth factor-beta 1 null mice (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-06-24
    Description: Maternal sources of transforming growth factor-beta 1 (TGF-beta 1) are shown here to contribute to the normal appearance and perinatal survival of TGF-beta 1 null newborn mice. Labeled TGF-beta 1 crossed the placenta and was recovered intact from various tissues after oral administration to mouse pups. TGF beta-1 protein was also detected in cells recovered from breast milk. In immunohistochemical analyses, TGF-beta 1 null embryos and null newborn pups born to TGF-beta 1 heterozygotes stained positive for TGF-beta 1, whereas those born to a null female were negative and had severe cardiac abnormalities. These results suggest an important role for maternal sources of TGF-beta 1 during development and, more generally, provide evidence for maternal rescue of targeted gene disruption in the fetus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Letterio, J J -- Geiser, A G -- Kulkarni, A B -- Roche, N S -- Sporn, M B -- Roberts, A B -- New York, N.Y. -- Science. 1994 Jun 24;264(5167):1936-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chemoprevention, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8009224" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Embryonic and Fetal Development ; Female ; Fetus/*metabolism ; Heart Defects, Congenital/etiology ; Heterozygote ; Homozygote ; *Maternal-Fetal Exchange ; Mice ; Milk/chemistry ; Pregnancy ; Transforming Growth Factor beta/analysis/biosynthesis/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Identification of ras oncogene mutations in the stool of patients with curable colorectal tumors (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-04-03
    Description: Colorectal (CR) tumors are usually curable if detected before metastasis. Because genetic alterations are associated with the development of these tumors, mutant genes may be found in the stool of individuals with CR neoplasms. The stools of nine patients whose tumors contained mutations of K-ras were analyzed. In eight of the nine cases, the ras mutations were detectable in DNA purified from the stool. These patients included those with benign and malignant neoplasms from proximal and distal colonic epithelium. Thus, colorectal tumors can be detected by a noninvasive method based on the molecular pathogenesis of the disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sidransky, D -- Tokino, T -- Hamilton, S R -- Kinzler, K W -- Levin, B -- Frost, P -- Vogelstein, B -- CA06973/CA/NCI NIH HHS/ -- CA35494/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Apr 3;256(5053):102-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Oncology, Johns Hopkins University, Baltimore, MD 21231.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1566048" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Amino Acid Sequence ; Base Sequence ; Blotting, Southern ; Carcinoma/diagnosis/*genetics/pathology ; Colonic Neoplasms/diagnosis/*genetics/pathology ; DNA, Neoplasm/genetics/*isolation & purification ; Feces/chemistry ; Female ; *Genes, ras ; Humans ; Male ; Middle Aged ; Molecular Sequence Data ; *Mutation ; Oligodeoxyribonucleotides ; Polymerase Chain Reaction ; Prognosis ; Rectal Neoplasms/diagnosis/*genetics/pathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Population dynamics of the United States and the Soviet Union (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-03-30
    Description: Population growth in the United States and the Soviet Union is slowing. Since the 1970s, labor force growth in both countries is slowing even more than population growth, and both countries are aging. Economic effects of slowing growth can be compensated for by increased participation in the labor force and increased productivity and by adjustments in the military forces. Economic flexibility and policy choices will determine how successfully the trend to slower population growth will be accommodated.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Torrey, B B -- Kingkade, W W -- New York, N.Y. -- Science. 1990 Mar 30;247(4950):1548-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for International Research, U.S. Bureau of the Census, Washington DC 20233.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2321015" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Aged ; Female ; Fertility ; Humans ; Male ; Middle Aged ; *Population Dynamics ; Ussr ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Protection against mucoid Pseudomonas aeruginosa in rodent models of endobronchial infections (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-08-03
    Description: Chronic endobronchial infection with mucoid Pseudomonas aeruginosa accounts for much of the morbidity and mortality in patients with cystic fibrosis (CF). Reduced morbidity is observed when infection is absent. Clinical investigations have implicated opsonizing antibody specific for the mucoid exopolysaccharide (MEP) surrounding these bacteria as a potential immunologic protective mechanism, whereas nonopsonizing antibody to MEP is not protective. Mice and rats immunized with doses of MEP that elicited opsonizing antibody had reduced levels of infection compared with nonimmune controls after intratracheal challenge with mucoid P. aeruginosa enmeshed in agar beads. Doses of MEP that elicited nonopsonizing antibody were not protective. Parallel experiments in which passive transfer of polyclonal and monoclonal opsonizing and nonopsonizing antibody were used yielded similar results. These data indicate that MEP-specific opsonizing antibody can protect against chronic P. aeruginosa infection in this model of disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pier, G B -- Small, G J -- Warren, H B -- AI 22534/AI/NIAID NIH HHS/ -- AI 22806/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1990 Aug 3;249(4968):537-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Animal Resource Center, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2116663" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*therapeutic use ; Cystic Fibrosis/complications ; Disease Models, Animal ; Female ; Immunization, Passive ; Lung/pathology ; Polysaccharides, Bacterial/*immunology ; Pseudomonas Infections/*immunology/pathology/prevention & control ; Pseudomonas aeruginosa/immunology ; Rats
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    A genetic test of the natal homing versus social facilitation models for green turtle migration (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-05-11
    Description: Female green turtles exhibit strong nest-site fidelity as adults, but whether the nesting beach is the natal site is not known. Under the natal homing hypothesis, females return to their natal beach to nest, whereas under the social facilitation model, virgin females follow experienced breeders to nesting beaches and after a "favorable" nesting experience, fix on that site for future nestings. Differences shown in mitochondrial DNA genotype frequency among green turtle colonies in the Caribbean Sea and Atlantic Ocean are consistent with natal homing expectations and indicate that social facilitation to nonnatal sites is rare.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meylan, A B -- Bowen, B W -- Avise, J C -- New York, N.Y. -- Science. 1990 May 11;248(4956):724-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Natural Resources, Florida Marine Research Institute, Petersburgh 33701.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2333522" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA, Mitochondrial/*genetics ; Female ; Genotype ; Models, Psychological ; *Orientation ; *Social Facilitation ; Turtles/genetics/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Regulation of progesterone receptor-mediated transcription by phosphorylation (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-12-21
    Description: The progesterone receptor (PR) in the chicken oviduct is a phosphoprotein that regulates gene transcription in the presence of progesterone. Treatment with progesterone in vivo stimulates phosphorylation of the progesterone receptor. With transient transfection assays, the present work has tested whether phosphorylation participates in the regulation of PR-mediated transcription. Treatment with 8-bromo-cyclic adenosine monophosphate (8-Br cAMP), a stimulator of cAMP-dependent protein kinase [protein kinase A (PKA)], mimicked progesterone-dependent, receptor-mediated transcription in the absence of progesterone. Inhibition of PKA blocked hormone action. Treatment with okadaic acid, an inhibitor of protein phosphatases 1 and 2A, stimulated transcription in a manner similar to that of progesterone. These observations suggest that phosphorylation of the PR or other proteins in the transcription complex can modulate PR-mediated transcription in vivo.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Denner, L A -- Weigel, N L -- Maxwell, B L -- Schrader, W T -- O'Malley, B W -- HD-07857/HD/NICHD NIH HHS/ -- HD-22061/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1990 Dec 21;250(4988):1740-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2176746" target="_blank"〉PubMed〈/a〉
    Keywords: 8-Bromo Cyclic Adenosine Monophosphate/pharmacology ; Animals ; Cell Line ; Chickens ; Female ; Gene Expression Regulation ; Kinetics ; Oviducts/metabolism ; Phosphoprotein Phosphatases/antagonists & inhibitors ; Phosphorylation ; Progesterone/*pharmacology ; Receptors, Progesterone/*metabolism ; *Transcription, Genetic/drug effects ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Linkage of early-onset familial breast cancer to chromosome 17q21 (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-12-21
    Description: Human breast cancer is usually caused by genetic alterations of somatic cells of the breast, but occasionally, susceptibility to the disease is inherited. Mapping the genes responsible for inherited breast cancer may also allow the identification of early lesions that are critical for the development of breast cancer in the general population. Chromosome 17q21 appears to be the locale of a gene for inherited susceptibility to breast cancer in families with early-onset disease. Genetic analysis yields a lod score (logarithm of the likelihood ratio for linkage) of 5.98 for linkage of breast cancer susceptibility to D17S74 in early-onset families and negative lod scores in families with late-onset disease. Likelihood ratios in favor of linkage heterogeneity among families ranged between 2000:1 and greater than 10(6):1 on the basis of multipoint analysis of four loci in the region.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, J M -- Lee, M K -- Newman, B -- Morrow, J E -- Anderson, L A -- Huey, B -- King, M C -- CA27632/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1990 Dec 21;250(4988):1684-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Public Health, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2270482" target="_blank"〉PubMed〈/a〉
    Keywords: Breast Neoplasms/diagnosis/etiology/*genetics ; Chromosome Mapping ; *Chromosomes, Human, Pair 17 ; Female ; Humans ; Male ; Pedigree ; Polymorphism, Genetic ; Pregnancy ; Risk Factors
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Requirement of human renal water channel aquaporin-2 for vasopressin-dependent concentration of urine (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-04-01
    Description: Concentration of urine in mammals is regulated by the antidiuretic hormone vasopressin. Binding of vasopressin to its V2 receptor leads to the insertion of water channels in apical membranes of principal cells in collecting ducts. In nephrogenic diabetes insipidus (NDI), the kidney fails to concentrate urine in response to vasopressin. A male patient with an autosomal recessive form of NDI was found to be a compound heterozygote for two mutations in the gene encoding aquaporin-2, a water channel. Functional expression studies in Xenopus oocytes revealed that each mutation resulted in nonfunctional water channel proteins. Thus, aquaporin-2 is essential for vasopressin-dependent concentration of urine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deen, P M -- Verdijk, M A -- Knoers, N V -- Wieringa, B -- Monnens, L A -- van Os, C H -- van Oost, B A -- New York, N.Y. -- Science. 1994 Apr 1;264(5155):92-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Physiology, University of Nijmegen, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8140421" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Aquaporin 2 ; Aquaporin 6 ; *Aquaporins ; Base Sequence ; Cloning, Molecular ; Deamino Arginine Vasopressin/*pharmacology ; Diabetes Insipidus/*genetics/physiopathology ; Female ; Genes, Recessive ; Heterozygote ; Humans ; Kidney/metabolism/*physiology ; *Kidney Concentrating Ability ; Male ; Membrane Proteins/chemistry/genetics/*physiology ; Molecular Sequence Data ; Oocytes ; Pedigree ; Point Mutation ; Protein Structure, Secondary ; RNA, Complementary/genetics ; Water/metabolism ; Xenopus laevis
    Print ISSN: 0036-8075
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  • 10
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    Natural vertical transmission of western equine encephalomyelitis virus in mosquitoes (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-02-04
    Description: The mechanism by which western equine encephalomyelitis (WEE) virus and other mosquito-borne alphaviruses (Togaviridae) survive during periods of vector inactivity is unknown. Recently, three strains of WEE virus were isolated from adult Aedes dorsalis collected as larvae from a salt marsh in a coastal region of California. This provides evidence of vertical transmission of WEE virus in mosquitoes in nature. Vertical transmission in Ae. dorsalis and closely related mosquito species may be an important mechanism for the maintenance of WEE virus in temperate regions in North America where horizontal transmission of the virus is seasonal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fulhorst, C F -- Hardy, J L -- Eldridge, B F -- Presser, S B -- Reeves, W C -- AI-03028/AI/NIAID NIH HHS/ -- AI-26154/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Feb 4;263(5147):676-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Public Health, University of California, Berkeley 94720.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8303276" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*microbiology ; Animals ; California ; Encephalitis Virus, Western Equine/isolation & purification/*physiology ; Encephalomyelitis, Equine/transmission ; Female ; Insect Vectors/*microbiology ; Larva/microbiology ; Male ; Seasons
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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