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  • Structure-Activity Relationship  (9)
  • American Association for the Advancement of Science (AAAS)  (9)
  • Springer Nature
  • 2000-2004
  • 1995-1999
  • 1980-1984  (9)
  • 1940-1944
  • 1980  (9)
Collection
Publisher
  • American Association for the Advancement of Science (AAAS)  (9)
  • Springer Nature
Years
  • 2000-2004
  • 1995-1999
  • 1980-1984  (9)
  • 1940-1944
Year
  • 1
    Publication Date: 1980-11-07
    Description: An analog of luteinizing hormone-releasing hormone containing a gamma-lactam as a conformational constraint has been prepared with the use of a novel cyclization of a methionine sulfonium salt. The analog is more active as a luteinizing hormone-releasing hormone agonist that the parent hormone, and provides evidence for a bioactive conformation containing a beta-turn.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freidinger, R M -- Veber, D F -- Perlow, D S -- Brooks, J R -- Saperstein, R -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):656-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001627" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Biological Assay ; Cells, Cultured ; Female ; *Gonadotropin-Releasing Hormone/analogs & derivatives ; Hydrogen Bonding ; Lactams ; Protein Conformation ; Rats ; Structure-Activity Relationship
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-06-27
    Description: A discussion of drug-receptor theory is used to show that the three-dimensional structure, or shape, of molecules is important for biological activity. The computer-assisted molecular modeling system at Merck is described, and it is shown that this system is useful for generating and storing molecular structures, determining preferred conformation, comparing molecular shapes, and computing molecular properties. Applications of the system to the study of anti-inflammatory drugs, somatostatin-like compounds, and dihydrofolate reductase inhibitors are summarized.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gund, P -- Andose, J D -- Rhodes, J B -- Smith, G M -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1425-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6104357" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arachidonic Acids ; Binding Sites ; Computers ; Cyclooxygenase Inhibitors ; Humans ; Indomethacin ; *Models, Molecular ; *Models, Structural ; *Molecular Conformation ; *Pharmaceutical Preparations ; Receptors, Drug/metabolism ; Somatostatin/analogs & derivatives ; Structure-Activity Relationship
    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: 1980-01-18
    Description: When unilamellar vesicles were administered subcutaneously in mice, the half-time for the destruction of the vesicles varied from 12 to 600 hours, depending on their composition. The vesicles tested consisted of distearoyl phosphatidylcholine, cholesterol, and certain sugar and amino-sugar derivatives of cholesterol. Vesicle with amino-sugar derivatives showed the greatest longevity and became localized with high specificity in aggregates of polymorphonuclear leukocytes. A substantial delay between the time that the vesicles broke open and the time that labels contained in the vesicles were excreted suggests that the vesicles undergo endocytosis before destruction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mauk, M R -- Gamble, R C -- Baldeschwieler, J D -- New York, N.Y. -- Science. 1980 Jan 18;207(4428):309-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350660" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cholesterol/analogs & derivatives ; Endocytosis ; Liposomes/*therapeutic use ; Lysosomes/metabolism ; Metabolic Clearance Rate ; Mice ; Neutrophils/*metabolism ; Phosphatidylcholines ; Structure-Activity Relationship
    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: 1980-04-25
    Description: A high incidence of tumor regression was observed in guinea pigs bearing transplantable, line-10 hepatocellular carcinomas when synthetic muramyl dipeptides combined with trehalose dimycolate in oil-in-water emulsions were injected directly into the tumors. These compounds are promising candidates to replace viable bacillus Calmette-Guerin in cancer immunotherapy in humans and animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McLaughlin, C A -- Schwartzman, S M -- Horner, B L -- Jones, G H -- Moffatt, J G -- Nestor, J J Jr -- Tegg, D -- New York, N.Y. -- Science. 1980 Apr 25;208(4442):415-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7189295" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylmuramyl-Alanyl-Isoglutamine/administration & dosage/*therapeutic use ; Animals ; Cord Factors/administration & dosage/*therapeutic use ; Drug Combinations ; Emulsions ; Glycolipids/*therapeutic use ; Glycopeptides/*therapeutic use ; Immunotherapy ; Liver Neoplasms, Experimental/*therapy ; Lymphatic Metastasis ; Structure-Activity Relationship
    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: 1980-02-22
    Description: Extracts of fresh-frozen bovine neurohypophysis were purified by chromatographic techniques to isolate and characterize the components that produce natriuresis in nondiuretic dogs. Two compounds with natiuretic properties similar to those of synthetic arginine vasopressin accounted for most of the natriuretic activity and appeared to be the prevalent vasopressin-like molecules in the extract. These peptides were Ala-Gly-[Arg8]-vasopressin and Val-Asp-[Arg8]-vasopressin; the natriuretic potency of each appeared to be similar to synthetic arginine vasopressin and could be observed with doses in the range of 50 picomoles. In the dog the most conspicuous difference between synthetic arginine vasopressin and the new vasopressin peptides was the smaller pressor responses to natriuretic doses of the new compounds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gitelman, H J -- Klapper, D G -- Alderman, F R -- Blythe, W B -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):893-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355269" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Arginine Vasopressin/analogs & derivatives/*metabolism/pharmacology ; Biological Assay ; Blood Pressure/drug effects ; Cattle ; Dogs ; Male ; Natriuresis/*drug effects ; Pituitary Gland, Posterior/*metabolism ; Protein Precursors/metabolism ; Structure-Activity Relationship
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-10
    Description: Tissue-cultured rat myoballs were examined electrophysiologically with a suction pipette, which was used for voltage clamping and internal perfusion. The lidocaine derivative QX-314 caused a time- and membrane potentia-dependent block of acetylcholine-induced current only when applied from the extracellular membrane surface. The same compounds caused a use-dependent block of the sodium channel only from the intracellular membrane surface. These experiments demonstrate a fundamental asymmetry of the acetylcholine receptor-channel complex.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Horn, R -- Brodwick, M S -- Dickey, W D -- CA-19017/CA/NCI NIH HHS/ -- NS-12961/NS/NINDS NIH HHS/ -- NS-13778/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):205-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6251552" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylcholine/*metabolism ; Animals ; *Ion Channels/drug effects ; Lidocaine/*analogs & derivatives/pharmacology ; Membrane Potentials/drug effects ; Membrane Proteins ; Motor Endplate/*ultrastructure ; Neuromuscular Junction/*ultrastructure ; Rats ; *Receptors, Cholinergic ; Sodium/metabolism ; Structure-Activity Relationship
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-07
    Description: In most higher organisms, DNA is modified after synthesis by the enzymatic conversion of many cytosine residues to 5-methylcytosine. For several years, control of gene activity by DNA methylation has been recognized as a logically attractive possibility, but experimental support has proved elusive. However, there is now reason to believe, from recent studies, that DNA methylation is a key element in the hierarchy of control mechanisms that govern vertebrate gene function and differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Razin, A -- Riggs, A D -- GM20483/GM/NIGMS NIH HHS/ -- GM25825/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):604-10.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6254144" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Differentiation ; DNA/*physiology ; DNA (Cytosine-5-)-Methyltransferase/*metabolism ; DNA Restriction Enzymes/metabolism ; Deoxycytosine Nucleotides/*metabolism ; Deoxyribonucleoproteins/metabolism ; Gene Expression Regulation ; Methylation ; Methyltransferases/*metabolism ; Nucleosomes/ultrastructure ; Protein Binding ; Structure-Activity Relationship ; Substrate Specificity ; Tissue Distribution
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-01
    Description: The tear gas ethyl bromoacetate is a fruity-smelling alkylating agent that blocks the ability of the frog nose to respond to esters and a variety of other odorants, but leaves sensitivity to amines unimpaired. Lachrymators and chemical warfare agents of other functional types such as sulfides (mustard gas) and amines (nitrogen mustards) may have similarly specific actions that will enable their use as chemical probes of the sense of smell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Criswell, D W -- McClure, F L -- Schaefer, R -- Brower, K R -- New York, N.Y. -- Science. 1980 Oct;210(4468):425-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6968976" target="_blank"〉PubMed〈/a〉
    Keywords: Alkylating Agents/*pharmacology ; Amines ; Animals ; Chemical Warfare Agents/*pharmacology ; Esters ; Membrane Potentials/drug effects ; Rana pipiens ; Smell/*drug effects/physiology ; Structure-Activity Relationship
    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: 1980-08-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haseltine, W A -- Lo, K M -- D'Andrea, A D -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):929-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7403858" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Benzopyrenes/*pharmacology ; Carcinogens ; *DNA, Bacterial ; Dose-Response Relationship, Drug ; Epoxy Compounds ; Hydrolysis ; Lac Operon ; Mutagens ; Stereoisomerism ; Structure-Activity Relationship
    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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