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  • 1
    Publication Date: 1991-05-03
    Description: The imaging of living specimens in water by x-ray microscopy can be greatly enhanced with the use of an intense flash x-ray source and sophisticated technologies for reading x-ray images. A subnanosecond [corrected] x-ray pulse from a laser-produced plasma was used to record the x-ray image of living sea urchin sperm in an x-ray resist. The resist relief was visualized at high resolution by atomic-force microscopy. Internal structure of the sperm head was evident, and the carbon density in a flagellum was estimated from the relief height.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tomie, T -- Shimizu, H -- Majima, T -- Yamada, M -- Kanayama, T -- Kondo, H -- Yano, M -- Ono, M -- New York, N.Y. -- Science. 1991 May 3;252(5006):691-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Electrotechnical Laboratory, Ibaraki, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2024121" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/ultrastructure ; Male ; Methylmethacrylates ; Microscopy/*methods ; Mitochondria/ultrastructure ; *Sea Urchins ; Seawater ; Sperm Tail/*ultrastructure ; X-Rays
    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
    Publication Date: 1992-07-17
    Description: N-type calcium channels are omega-conotoxin (omega-CgTx)-sensitive, voltage-dependent ion channels involved in the control of neurotransmitter release from neurons. Multiple subtypes of voltage-dependent calcium channel complexes exist, and it is the alpha 1 subunit of the complex that forms the pore through which calcium enters the cell. The primary structures of human neuronal calcium channel alpha 1B subunits were deduced by the characterization of overlapping complementary DNAs. Two forms (alpha 1B-1 and alpha 1B-2) were identified in human neuroblastoma (IMR32) cells and in the central nervous system, but not in skeletal muscle or aorta tissues. The alpha 1B-1 subunit directs the recombinant expression of N-type calcium channel activity when it is transiently co-expressed with human neuronal beta 2 and alpha 2b subunits in mammalian HEK293 cells. The recombinant channel was irreversibly blocked by omega-CgTx but was insensitive to dihydropyridines. The alpha 1B-1 alpha 2b beta 2-transfected cells displayed a single class of saturable, high-affinity (dissociation constant = 55 pM) omega-CgTx binding sites. Co-expression of the beta 2 subunit was necessary for N-type channel activity, whereas the alpha 2b subunit appeared to modulate the expression of the channel. The heterogeneity of alpha 1B subunits, along with the heterogeneity of alpha 2 and beta subunits, is consistent with multiple, biophysically distinct N-type calcium channels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Williams, M E -- Brust, P F -- Feldman, D H -- Patthi, S -- Simerson, S -- Maroufi, A -- McCue, A F -- Velicelebi, G -- Ellis, S B -- Harpold, M M -- New York, N.Y. -- Science. 1992 Jul 17;257(5068):389-95.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉SIBIA, Inc., La Jolla, CA 92037.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1321501" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Calcium/metabolism ; Calcium Channels/*drug effects/*genetics/*metabolism ; Cell Line ; Female ; Humans ; Male ; Membrane Potentials ; Molecular Sequence Data ; Neuroblastoma/metabolism ; Peptides, Cyclic/*pharmacology ; Sequence Alignment ; Sequence Homology, Nucleic Acid ; Transfection ; omega-Conotoxin GVIA
    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
    Publication Date: 1992-11-13
    Description: Linkage analysis of ten Utah kindreds and one Texas kindred with multiple cases of cutaneous malignant melanoma (CMM) provided evidence that a locus for familial melanoma susceptibility is in the chromosomal region 9p13-p22. The genetic markers analyzed reside in a candidate region on chromosome 9p21, previously implicated by the presence of homozygous deletions in melanoma tumors and by the presence of a germline deletion in an individual with eight independent melanomas. Multipoint linkage analysis was performed between the familial melanoma susceptibility locus (MLM) and two short tandem repeat markers, D9S126 and the interferon-alpha (IFNA) gene, which reside in the region of somatic loss in melanoma tumors. An analysis incorporating a partially penetrant dominant melanoma susceptibility locus places MLM near IFNA and D9S126 with a maximum location score of 12.71. Therefore, the region frequently deleted in melanoma tumors on 9p21 presumably contains a locus that plays a critical role in predisposition to familial melanoma.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cannon-Albright, L A -- Goldgar, D E -- Meyer, L J -- Lewis, C M -- Anderson, D E -- Fountain, J W -- Hegi, M E -- Wiseman, R W -- Petty, E M -- Bale, A E -- CA 42014/CA/NCI NIH HHS/ -- CA 48711/CA/NCI NIH HHS/ -- RR 00064/RR/NCRR NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1992 Nov 13;258(5085):1148-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City 84132.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1439824" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Adult ; Aged ; Aged, 80 and over ; Base Sequence ; Child ; Chromosome Aberrations ; *Chromosomes, Human, Pair 9 ; Dysplastic Nevus Syndrome/genetics ; Female ; Genes, Tumor Suppressor ; Genetic Markers ; Humans ; Lod Score ; Male ; Melanoma/*genetics ; Middle Aged ; Molecular Sequence Data ; Pedigree ; Skin Neoplasms/*genetics ; Texas ; Utah
    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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  • 4
    Publication Date: 1990-07-13
    Description: Von Recklinghausen neurofibromatosis (NF1) is a common autosomal dominant disorder characterized by abnormalities in multiple tissues derived from the neural crest. No reliable cellular phenotypic marker has been identified, which has hampered direct efforts to identify the gene. The chromosome location of the NF1 gene has been previously mapped genetically to 17q11.2, and data from two NF1 patients with balanced translocations in this region have further narrowed the candidate interval. The use of chromosome jumping and yeast artificial chromosome technology has now led to the identification of a large (approximately 13 kilobases) ubiquitously expressed transcript (denoted NF1LT) from this region that is definitely interrupted by one and most likely by both translocations. Previously identified candidate genes, which failed to show abnormalities in NF1 patients, are apparently located within introns of NF1LT, on the antisense strand. A new mutation patient with NF1 has been identified with a de novo 0.5-kilobase insertion in the NF1LT gene. These observations, together with the high spontaneous mutation rate of NF1 (which is consistent with a large locus), suggest that NF1LT represents the elusive NF1 gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, M R -- Marchuk, D A -- Andersen, L B -- Letcher, R -- Odeh, H M -- Saulino, A M -- Fountain, J W -- Brereton, A -- Nicholson, J -- Mitchell, A L -- NS23410/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1990 Jul 13;249(4965):181-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Ann Arbor, MI.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2134734" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Amino Acid Sequence ; Animals ; Base Sequence ; Blotting, Northern ; Blotting, Southern ; Cell Line ; Cloning, Molecular ; DNA, Neoplasm/genetics ; Gene Expression Regulation, Neoplastic ; Humans ; Hybrid Cells ; Male ; Mice ; Molecular Sequence Data ; Mutation ; Neurofibromatosis 1/*genetics ; Protein Biosynthesis ; RNA, Neoplasm/*genetics ; Transcription, Genetic ; *Translocation, Genetic ; Tumor Cells, Cultured
    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
    Publication Date: 1990-02-09
    Description: Nerve growth factor (NGF) is synthesized in male germ cells. The NGF receptor (NGFR) mRNA was found in the Sertoli cells of rat testis. Hypophysectomy increased both NGFR mRNA in testis and the number of NGFR hybridizing cells in seminiferous tubules. This was suppressed by treatment with chorionic gonadotropin or testosterone, but not with follicle-stimulating hormone. The NGFR mRNA also increased after destruction of Leydig cells or blocking of the androgen receptor. This suggests that NGF produced by male germ cells regulates testicular function in an androgen-modulated fashion by mediating an interaction germ and Sertoli cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Persson, H -- Ayer-Le Lievre, C -- Soder, O -- Villar, M J -- Metsis, M -- Olson, L -- Ritzen, M -- Hokfelt, T -- New York, N.Y. -- Science. 1990 Feb 9;247(4943):704-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medical Chemistry, Karolinska Institute, Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2154035" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chorionic Gonadotropin/pharmacology ; DNA Probes ; Down-Regulation/*drug effects ; Follicle Stimulating Hormone/pharmacology ; Gene Expression Regulation/*drug effects ; Hypophysectomy ; Leydig Cells/drug effects/physiology ; Male ; Mesylates/pharmacology ; Nucleic Acid Hybridization ; RNA, Messenger/*genetics ; Rats ; Rats, Inbred Strains ; Receptors, Androgen/physiology ; Receptors, Cell Surface/*genetics ; Receptors, Nerve Growth Factor ; Sertoli Cells/*metabolism ; Testis/metabolism ; Testosterone/*pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 6
    Publication Date: 1991-05-17
    Description: Two of the first human immunodeficiency virus type-1 (HIV-1) strains isolated were authenticated by reanalyzing original cultured samples stored at the Collection Nationale de Culture des Microorganismes as well as uncultured primary material. Cloned polymerase chain reaction products were used to analyze coding sequences of the V3 loop in the gp120 glycoprotein. The original isolate HIV-1 Bru, formerly called LAV, was derived from patient BRU. HIV-1 Lai was derived from patient LAI and contaminated a HIV-1 Bru culture between 20 July and 3 August 1983. The culture became, in effect, HIV-1 Lai, identifiable by a unique motif in the V3 loop. Because of this contamination two, rather than one, HIV-1 isolates were sent to the Laboratory of Tumor Cell Biology at the National Cancer Institute on 23 September 1983. Original HIV-1 Bru was indeed present in the sample marked JBB/LAV. However the M2T-/B sample harbored HIV-1 Lai, a strain capable of growing on established cell lines. The striking similarity between HIV-1 Lai (formerly LAV-Bru) and HTLV-3B sequences remains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wain-Hobson, S -- Vartanian, J P -- Henry, M -- Chenciner, N -- Cheynier, R -- Delassus, S -- Martins, L P -- Sala, M -- Nugeyre, M T -- Guetard, D -- New York, N.Y. -- Science. 1991 May 17;252(5008):961-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire de Retrovirologie Moleculaire, Institut Pasteur, Paris.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2035026" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; Acquired Immunodeficiency Syndrome/*microbiology/pathology ; Amino Acid Sequence ; Base Sequence ; Biopsy ; Cell Line ; Cloning, Molecular ; DNA, Viral/genetics/isolation & purification ; France ; HIV Envelope Protein gp120/*genetics ; HIV-1/classification/genetics/growth & development/*isolation & purification ; Humans ; Lymph Nodes/microbiology/pathology ; Male ; Molecular Sequence Data ; National Institutes of Health (U.S.) ; Oligonucleotide Probes ; Polymerase Chain Reaction/methods ; Sequence Homology, Nucleic Acid ; United States ; Virology/methods
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  • 7
    Publication Date: 1990-08-17
    Description: In 1988 to 1989, 698 adult cadavers in Abidjan's two largest morgues were studied, representing 38 to 43% of all adult deaths in the city over the study period, and 6 to 7% of annual deaths. Forty-one percent of male and 32% of female cadavers were infected with human immunodeficiency virus (HIV). Fifteen percent of adult male and 13% of adult female annual deaths are due to acquired immunodeficiency syndrome (AIDS). In Abidjan, AIDS is the leading cause of death and years of potential life lost in adult men, followed by unintentional injuries and tuberculosis. In women, AIDS is the second leading cause of death and premature mortality, after deaths related to pregnancy and abortion. AIDS-specific and AIDS-proportional mortality rates may be higher in other African cities where AIDS has been found for a longer time than in Abidjan.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉De Cock, K M -- Barrere, B -- Diaby, L -- Lafontaine, M F -- Gnaore, E -- Porter, A -- Pantobe, D -- Lafontant, G C -- Dago-Akribi, A -- Ette, M -- New York, N.Y. -- Science. 1990 Aug 17;249(4970):793-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Infectious Diseases, Centers for Disease Control, Atlanta, GA 30333.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2167515" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/epidemiology/*mortality ; Adolescent ; Adult ; Africa ; Cause of Death ; Cote d'Ivoire ; Female ; HIV Seropositivity ; HIV-1/immunology ; HIV-2/immunology ; Humans ; Male
    Print ISSN: 0036-8075
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  • 8
    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
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  • 9
    Publication Date: 1993-06-04
    Description: Biological variability of human immunodeficiency virus type-1 (HIV-1) is involved in the pathogenesis of acquired immunodeficiency syndrome (AIDS). Syncytium-inducing (SI) HIV-1 variants emerge in 50 percent of infected individuals during infection, preceding accelerated CD4+ T cell loss and rapid progression to AIDS. The V1 to V2 and V3 region of the viral envelope glycoprotein gp120 contained the major determinants of SI capacity. The configuration of a hypervariable locus in the V2 domain appeared to be predictive for non-SI to SI phenotype conversion. Early prediction of HIV-1 phenotype evolution may be useful for clinical monitoring and treatment of asymptomatic infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Groenink, M -- Fouchier, R A -- Broersen, S -- Baker, C H -- Koot, M -- van't Wout, A B -- Huisman, H G -- Miedema, F -- Tersmette, M -- Schuitemaker, H -- New York, N.Y. -- Science. 1993 Jun 4;260(5113):1513-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Clinical Viro-Immunology, Central Laboratory of the Netherlands Red Cross Blood Transfusion Service, Amsterdam.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8502996" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/microbiology ; Amino Acid Sequence ; Base Sequence ; Biological Evolution ; Consensus Sequence ; Genetic Variation ; Giant Cells/microbiology ; HIV Envelope Protein gp120/*chemistry ; HIV Seropositivity/microbiology ; HIV-1/*chemistry/*genetics/pathogenicity ; Humans ; Male ; Molecular Sequence Data ; Phenotype ; Protein Conformation ; Recombination, Genetic
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  • 10
    Publication Date: 1994-04-29
    Description: In a search for genes that regulate circadian rhythms in mammals, the progeny of mice treated with N-ethyl-N-nitrosourea (ENU) were screened for circadian clock mutations. A semidominant mutation, Clock, that lengthens circadian period and abolishes persistence of rhythmicity was identified. Clock segregated as a single gene that mapped to the midportion of mouse chromosome 5, a region syntenic to human chromosome 4. The power of ENU mutagenesis combined with the ability to clone murine genes by map position provides a generally applicable approach to study complex behavior in mammals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839659/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3839659/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vitaterna, M H -- King, D P -- Chang, A M -- Kornhauser, J M -- Lowrey, P L -- McDonald, J D -- Dove, W F -- Pinto, L H -- Turek, F W -- Takahashi, J S -- P30-CA07175/CA/NCI NIH HHS/ -- R01-DK40493/DK/NIDDK NIH HHS/ -- T32 NS071040/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- etc. -- New York, N.Y. -- Science. 1994 Apr 29;264(5159):719-25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurobiology and Physiology, Northwestern University, Evanston, IL 60208.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8171325" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Chromosome Mapping ; Chromosomes, Human, Pair 4 ; Circadian Rhythm/*genetics ; Ethylnitrosourea ; Female ; *Genes ; Genotype ; Humans ; Male ; Mice ; Mice, Inbred C57BL ; *Mutagenesis ; Phenotype
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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