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  • 1
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    Prion-induced amyloid heart disease with high blood infectivity in transgenic mice (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-07-11
    Description: We investigated extraneural manifestations in scrapie-infected transgenic mice expressing prion protein lacking the glycophosphatydylinositol membrane anchor. In the brain, blood, and heart, both abnormal protease-resistant prion protein (PrPres) and prion infectivity were readily detected by immunoblot and by inoculation into nontransgenic recipients. The titer of infectious scrapie in blood plasma exceeded 10(7) 50% infectious doses per milliliter. The hearts of these transgenic mice contained PrPres-positive amyloid deposits that led to myocardial stiffness and cardiac disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1820586/" 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/PMC1820586/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trifilo, Matthew J -- Yajima, Toshitaka -- Gu, Yusu -- Dalton, Nancy -- Peterson, Kirk L -- Race, Richard E -- Meade-White, Kimberly -- Portis, John L -- Masliah, Eliezer -- Knowlton, Kirk U -- Chesebro, Bruce -- Oldstone, Michael B A -- 5R01HL66424-04/HL/NHLBI NIH HHS/ -- AGO4342/PHS HHS/ -- NS041219-05/NS/NINDS NIH HHS/ -- P01 AG004342/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 2006 Jul 7;313(5783):94-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Viral-Immunobiology Laboratory, Departments of Molecular and Integrative Neurosciences and Infectology, Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16825571" target="_blank"〉PubMed〈/a〉
    Keywords: Amyloid/*analysis ; Amyloidosis/blood/etiology/*pathology/physiopathology ; Animals ; Blotting, Western ; Cardiac Catheterization ; Coronary Vessels/chemistry/pathology ; Disease Models, Animal ; Glycosylphosphatidylinositols ; Heart Diseases/blood/etiology/*pathology/physiopathology ; Heart Function Tests ; Immunohistochemistry ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Microcirculation/chemistry/pathology ; Myocardial Contraction ; Myocardium/*chemistry/*pathology ; PrPC Proteins/chemistry ; PrPSc Proteins/*analysis/blood ; Scrapie/blood/*pathology/physiopathology ; Staining and Labeling ; Time Factors
    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
    Electronic Resource
    Electronic Resource
    A model of carbon dioxide assimilation in Chlamydomonas reinhardii (1985)
    Springer
    Planta 164 (1985), S. 308-320 
    Details
    ISSN: 1432-2048
    Keywords: Bicarbonate transport ; Carbon dioxide concentrating system ; Chlamydomonas ; Chlorophyta ; Mutant (Chlamydomonas) ; Photosynthesis (modeling)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A simple model of photosynthetic CO2 assimilation in Chlamydomonas has been developed in order to evaluate whether a CO2-concentrating system could explain the photosynthetic characteristics of this alga (high apparent affinity for CO2, low photorespiration, little O2 inhibition of photosynthesis, and low CO2 compensation concentration). Similarly, the model was developed to evaluate whether the proposed defects in the CO2-concentrating system of two Chlamydomonas mutants were consistent with their observed photosynthetic characteristics. The model treats a Chlamydomonas cell as a single compartment with two carbon inputs: passive diffusion of CO2, and active transport of HCO 3 - . Internal inorganic carbon was considered to have two potential fates: assimilation to fixed carbon via ribulose 1,5-bisphosphate carboxylase-oxygenase or exiting the cell by either passive CO2 diffusion or reversal of HCO 3 - transport. Published values for kinetic parameters were used where possible. The model accurately reproduced the CO2-response curves of photosynthesis for wild-type Chlamydomonas, the two mutants defective in the CO2-concentrating system, and a double mutant constructed by crossing these two mutants. The model also predicts steady-state internal inorganic-carbon concentrations in reasonable agreement with measured values in all four cases. Carbon dioxide compensation concentrations for wild-type Chlamydomonas were accurately predicted by the model and those predicted for the mutants were in qualitative agreement with measured values. The model also allowed calculation of approximate energy costs of the CO2-concentrating system. These calculations indicate that the system may be no more energy-costly than C4 photosynthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00402942
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