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  • 1
    Publication Date: 1989-05-12
    Description: Methotrexate coupled to maleylated bovine serum albumin was taken up efficiently through the "scavenger" receptors present on macrophages and led to selective killing of intracellular Leishmania mexicana amazonensis amastigotes in cultured hamster peritoneal macrophages. The drug conjugate was nearly 100 times as effective as free methotrexate in eliminating the intracellular parasites. Furthermore, in a model of experimental cutaneous leishmaniasis in hamsters, the drug conjugate brought about more than 90% reduction in the size of footpad lesions within 11 days. In contrast, the free drug at a similar concentration did not significantly affect lesion size. These studies demonstrate the potential of receptor-mediated drug delivery in the therapy of macrophage-associated diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mukhopadhyay, A -- Chaudhuri, G -- Arora, S K -- Sehgal, S -- Basu, S K -- New York, N.Y. -- Science. 1989 May 12;244(4905):705-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Microbial Technology, Chandigarh, India.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2717947" target="_blank"〉PubMed〈/a〉
    Keywords: Albumins/*administration & dosage/metabolism ; Animals ; Cells, Cultured ; Cricetinae ; Female ; Kinetics ; Leishmania mexicana/*drug effects ; Leishmaniasis/*drug therapy ; Macrophages/metabolism/*parasitology ; Male ; *Membrane Proteins ; Mesocricetus ; Methotrexate/*administration & dosage/pharmacology/therapeutic use ; *Receptors, Immunologic/metabolism ; *Receptors, Lipoprotein ; Receptors, Scavenger ; Scavenger Receptors, Class B ; Serum Albumin, Bovine
    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: 1985-08-02
    Description: Beta-galactosidase-deficient siblings in two litters of English springer spaniel puppies showed a progressive neurological impairment, dwarfism, orbital hypertelorism, and dysostosis multiplex. An excess of GM1-ganglioside was found in the brain. Three abnormal oligosaccharides were present in samples of urine, brain, liver, and cartilage. Light microscopy of selected tissue specimens revealed cytoplasmic vacuoles in neurons, circulating blood cells, macrophages, and chondrocytes. Ultrastructural studies demonstrated that these membrane-bound vacuoles were of two types--one containing lamellated membranes and the other, finely granular material. These clinical and pathological findings are similar to those observed in human patients affected by the infantile form of GM1-gangliosidosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alroy, J -- Orgad, U -- Ucci, A A -- Schelling, S H -- Schunk, K L -- Warren, C D -- Raghavan, S S -- Kolodny, E H -- HD 05515/HD/NICHD NIH HHS/ -- HD04147/HD/NICHD NIH HHS/ -- NS 21765/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1985 Aug 2;229(4712):470-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3925555" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bone Diseases, Metabolic/enzymology/genetics/*veterinary ; Dog Diseases/*enzymology/genetics/pathology ; Dogs ; Female ; G(M1) Ganglioside ; Gangliosidoses/enzymology/genetics/pathology/*veterinary ; Humans ; Lactose Intolerance/genetics/metabolism/*veterinary ; Male ; Neurons/pathology ; Oligosaccharides/metabolism ; Pedigree ; Vacuoles/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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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1985-11-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baum, M J -- Carroll, R S -- Erskine, M S -- Tobet, S A -- New York, N.Y. -- Science. 1985 Nov 22;230(4728):960-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2997925" target="_blank"〉PubMed〈/a〉
    Keywords: Estrogens, Conjugated (USP)/*pharmacology ; Female ; *Homosexuality ; Humans ; Luteinizing Hormone/*secretion ; Male
    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
    Publication Date: 1987-01-30
    Description: In seven right-handed adults, the brain electrical patterns before accurate performance differed from the patterns before inaccurate performance. Activity overlying the left frontal cortex and the motor and parietal cortices contralateral to the performing hand preceded accurate left- or right-hand performance. Additional strong activity overlying midline motor and premotor cortices preceded left-hand performance. These measurements suggest that brief, spatially distributed neural activity patterns, or "preparatory sets," in distinct cognitive, somesthetic-motor, and integrative motor areas of the human brain may be essential precursors of accurate visuomotor performance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gevins, A S -- Morgan, N H -- Bressler, S L -- Cutillo, B A -- White, R M -- Illes, J -- Greer, D S -- Doyle, J C -- Zeitlin, G M -- New York, N.Y. -- Science. 1987 Jan 30;235(4788):580-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3810158" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Cerebral Cortex/*physiology ; Cognition/physiology ; Electroencephalography ; Electrophysiology ; Functional Laterality ; Humans ; Male ; Motor Activity/physiology ; Time Factors ; Visual Perception/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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  • 5
    Publication Date: 1987-05-29
    Description: Preneoplastic and neoplastic liver nodules and hepatocytes isolated from regenerating rat liver have been shown to be resistant to a broad range of carcinogenic agents. This phenomenon was studied by measuring the expression of the multidrug-resistant (mdr) gene in normal liver cells and in preneoplastic and neoplastic nodules and regenerating liver. Levels of messenger RNA for the mdr gene, which encodes P-glycoprotein, were elevated in both preneoplastic and neoplastic lesions. Expression of the mdr gene also reached high levels in regenerating rat liver 24 to 72 hours after partial hepatectomy. These results show that the expression of the mdr gene can be regulated in liver and is likely to be responsible for part of the multidrug-resistance phenotype of carcinogen-initiated hepatocytes and regenerating liver cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thorgeirsson, S S -- Huber, B E -- Sorrell, S -- Fojo, A -- Pastan, I -- Gottesman, M M -- New York, N.Y. -- Science. 1987 May 29;236(4805):1120-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3576227" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinogens/*pharmacology ; Drug Resistance/*genetics ; *Genes ; Humans ; Liver/drug effects ; Liver Neoplasms, Experimental/chemically induced ; Liver Regeneration/*drug effects ; Male ; Precancerous Conditions/chemically induced ; RNA, Messenger/genetics ; 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
    Publication Date: 1988-01-15
    Description: By means of a selective DNA amplification technique called polymerase chain reaction, proviral sequences of the human immunodeficiency virus (HIV-1) were identified directly in DNA isolated from peripheral blood mononuclear cells (PBMCs) of persons seropositive but not in DNA isolated from PBMCs of persons seronegative for the virus. Primer pairs from multiple regions of the HIV-1 genome were used to achieve maximum sensitivity of provirus detection. HIV-1 sequences were detected in 100% of DNA specimens from seropositive, homosexual men from whom the virus was isolated by coculture, but in none of the DNA specimens from a control group of seronegative, virus culture-negative persons. However, HIV-1 sequences were detected in 64% of DNA specimens from seropositive, virus culture-negative homosexual men. This method of DNA amplification made it possible to obtain results within 3 days, whereas virus isolation takes up to 3 to 4 weeks. The method may therefore be used to complement or replace virus isolation as a routine means of determining HIV-1 infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ou, C Y -- Kwok, S -- Mitchell, S W -- Mack, D H -- Sninsky, J J -- Krebs, J W -- Feorino, P -- Warfield, D -- Schochetman, G -- New York, N.Y. -- Science. 1988 Jan 15;239(4837):295-7.〈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/3336784" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*microbiology ; Base Sequence ; DNA, Viral/*blood ; DNA-Directed DNA Polymerase ; *Gene Amplification ; HIV/*genetics/isolation & purification ; HIV Seropositivity ; Homosexuality ; Humans ; Leukocytes, Mononuclear/*analysis ; Male ; Nucleic Acid Amplification Techniques ; Nucleic Acid Hybridization ; Virus Cultivation
    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
    Publication Date: 1988-11-11
    Description: Increasing mortality in intravenous (IV) drug users not reported to surveillance as acquired immunodeficiency syndrome (AIDS) has occurred in New York City coincident with the AIDS epidemic. From 1981 to 1986, narcotics-related deaths increased on average 32% per year from 492 in 1981 to 1996 in 1986. This increase included deaths from AIDS increasing from 0 to 905 and deaths from other causes, many of which were infectious diseases, increasing from 492 to 1091. Investigations of these deaths suggest a causal association with human immunodeficiency virus (HIV) infection. These deaths may represent a spectrum of HIV-related disease that has not been identified through AIDS surveillance and has resulted in a large underestimation of the impact of AIDS on IV drug users and blacks and Hispanics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stoneburner, R L -- Des Jarlais, D C -- Benezra, D -- Gorelkin, L -- Sotheran, J L -- Friedman, S R -- Schultz, S -- Marmor, M -- Mildvan, D -- Maslansky, R -- New York, N.Y. -- Science. 1988 Nov 11;242(4880):916-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉AIDS Research Unit, New York City Department of Health, NY 10013.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3187532" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/complications/*epidemiology/microbiology ; Cause of Death ; Endocarditis/complications ; Hiv ; HIV Seropositivity ; Homosexuality ; Humans ; Male ; New York City ; Pneumonia/complications ; Substance-Related Disorders/*complications/epidemiology/mortality ; Tuberculosis/complications
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 1989-09-29
    Description: Adrenal steroids bind specifically to hippocampal neurons under normal conditions and may contribute to hippocampal cell loss during aging, but little is known about the neurophysiological mechanisms by which they may change hippocampal cell functions. In the present studies, adrenal steroids have been shown to modulate a well-defined membrane conductance in hippocampal pyramidal cells. The calcium-dependent slow afterhyperpolarization is reduced in hippocampal slices from adrenalectomized rats, and it is increased after in vivo or in vitro administration of the adrenal steroid, corticosterone. Calcium action potentials are also reduced in adrenalectomized animals, indicating that the primary effect of corticosteroids may be on calcium conductance. The afterhyperpolarization component reduced by adrenalectomy is greater in aged rats than in young rats, suggesting that, with aging, there is an increased effect of corticosteroids on some calcium-mediated brain processes. Because elevated concentrations of intracellular calcium can be cytotoxic, these observations may increase the understanding of glucocorticoid involvement in brain aging as well as of the normal functions of these steroids in the brain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kerr, D S -- Campbell, L W -- Hao, S Y -- Landfield, P W -- AG04542/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1989 Sep 29;245(4925):1505-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Pharmacology, Bowman Gray School of Medicine, Winston-Salem, NC 27103.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2781293" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Adrenal Cortex Hormones/*pharmacology ; Adrenalectomy ; Aging/*physiology ; Animals ; Calcium/metabolism ; Hippocampus/*drug effects ; In Vitro Techniques ; Male ; Neurons/drug effects ; Rats ; Rats, Inbred F344 ; Tetrodotoxin/pharmacology
    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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  • 9
    Publication Date: 1989-06-09
    Description: Respondents in the 1988 General Social Survey (GSS) were asked to scan their acquaintance networks to identify all those who had been a victim of a homicide or had acquired immunodeficiency syndrome (AIDS). Estimates of the sex, race, age, and regional breakdowns for homicides in the last year and for people with AIDS were compared with official statistics. The GSS estimates for the distribution of homicide victims replicate the official statistics quite well. The GSS estimates for AIDS cases suggest that the data provided to the Centers for Disease Control may underestimate by a substantial margin the prevalence of AIDS in the white population of higher socioeconomic status, overstate the relative prevalence of the disease in the minority populations, underestimate the prevalence of the disease in the Midwest, and overstate it for the East.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Laumann, E O -- Gagnon, J H -- Michaels, S -- Michael, R T -- Coleman, J S -- N0I-HD-8-2907/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1989 Jun 9;244(4909):1186-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Sociology, University of Chicago, IL 60637.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2543079" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/*epidemiology ; Centers for Disease Control and Prevention (U.S.) ; Demography ; Female ; Humans ; Male ; Population Surveillance ; United States
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  • 10
    Publication Date: 1989-11-17
    Description: The zona pellucida surrounding mouse oocytes is an extracellular matrix composed of three sulfated glycoproteins, ZP1, ZP2, and ZP3. It has been demonstrated that a monoclonal antibody to ZP3 injected into female mice inhibits fertilization by binding to the zona pellucida and blocking sperm penetration. A complementary DNA encoding ZP3 was randomly cleaved and 200- to 1000-base pair fragments were cloned into the expression vector lambda gt11. This epitope library was screened with the aforementioned contraceptive antibody, and the positive clones were used to map the seven-amino acid epitope recognized by the antibody. Female mice were immunized with a synthetic peptide containing this B cell epitope coupled to a carrier protein to provide helper T cell epitopes. The resultant circulating antibodies to ZP3 bound to the zona pellucida of immunized animals and produced long-lasting contraception. The lack of ovarian histopathology or cellular cytotoxicity among the immunized animals may be because of the absence of zona pellucida T cell epitopes in this vaccine.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Millar, S E -- Chamow, S M -- Baur, A W -- Oliver, C -- Robey, F -- Dean, J -- New York, N.Y. -- Science. 1989 Nov 17;246(4932):935-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular and Developmental Biology, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2479101" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antigens/immunology ; Base Sequence ; Cloning, Molecular ; *Contraception ; *Contraception, Immunologic ; DNA/genetics ; *Egg Proteins ; Epitopes/analysis ; Female ; Glycoproteins/genetics/*immunology ; Male ; *Membrane Glycoproteins ; Mice ; Molecular Sequence Data ; Ovum/*physiology ; Protein Conformation ; RNA, Messenger/genetics ; *Receptors, Cell Surface ; *Vaccination ; Zona Pellucida/*physiology
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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