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Wagoner J, Herring S, Hsiang TY, Ianevski A, Biering SB, Xu S, Hoffmann M, Pöhlmann S, Gale M, Aittokallio T, Schiffer JT, White JM, Polyak SJ. Combinations of Host- and Virus-Targeting Antiviral Drugs Confer Synergistic Suppression of SARS-CoV-2. Microbiol Spectr 2022; 10:e0333122. [PMID: 36190406 PMCID: PMC9718484 DOI: 10.1128/spectrum.03331-22] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 02/08/2023] Open
Abstract
Three directly acting antivirals (DAAs) demonstrated substantial reduction in COVID-19 hospitalizations and deaths in clinical trials. However, these agents did not completely prevent severe illness and are associated with cases of rebound illness and viral shedding. Combination regimens can enhance antiviral potency, reduce the emergence of drug-resistant variants, and lower the dose of each component in the combination. Concurrently targeting virus entry and virus replication offers opportunities to discover synergistic drug combinations. While combination antiviral drug treatments are standard for chronic RNA virus infections, no antiviral combination therapy has been approved for SARS-CoV-2. Here, we demonstrate that combining host-targeting antivirals (HTAs) that target TMPRSS2 and hence SARS-CoV-2 entry, with the DAA molnupiravir, which targets SARS-CoV-2 replication, synergistically suppresses SARS-CoV-2 infection in Calu-3 lung epithelial cells. Strong synergy was observed when molnupiravir, an oral drug, was combined with three TMPRSS2 (HTA) oral or inhaled inhibitors: camostat, avoralstat, or nafamostat. The combination of camostat plus molnupiravir was also effective against the beta and delta variants of concern. The pyrimidine biosynthesis inhibitor brequinar combined with molnupiravir also conferred robust synergistic inhibition. These HTA+DAA combinations had similar potency to the synergistic all-DAA combination of molnupiravir plus nirmatrelvir, the protease inhibitor found in paxlovid. Pharmacodynamic modeling allowed estimates of antiviral potency at all possible concentrations of each agent within plausible therapeutic ranges, suggesting possible in vivo efficacy. The triple combination of camostat, brequinar, and molnupiravir further increased antiviral potency. These findings support the development of HTA+DAA combinations for pandemic response and preparedness. IMPORTANCE Imagine a future viral pandemic where if you test positive for the new virus, you can quickly take some medicines at home for a few days so that you do not get too sick. To date, only single drugs have been approved for outpatient use against SARS-CoV-2, and we are learning that these have some limitations and may succumb to drug resistance. Here, we show that combinations of two oral drugs are better than the single ones in blocking SARS-CoV-2, and we use mathematical modeling to show that these drug combinations are likely to work in people. We also show that a combination of three oral drugs works even better at eradicating the virus. Our findings therefore bode well for the development of oral drug cocktails for at home use at the first sign of an infection by a coronavirus or other emerging viral pathogens.
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Affiliation(s)
- Jessica Wagoner
- Virology Division, Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Shawn Herring
- Virology Division, Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Tien-Ying Hsiang
- Department of Immunology, University of Washington, Seattle, Washington, USA
| | - Aleksandr Ianevski
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
| | - Scott B. Biering
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California—Berkeley, Berkeley, California, USA
| | - Shuang Xu
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Markus Hoffmann
- Infection Biology Unit, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, University of Göttingen, Göttingen, Germany
| | - Stefan Pöhlmann
- Infection Biology Unit, German Primate Center, Leibniz Institute for Primate Research, Göttingen, Germany
- Faculty of Biology and Psychology, University of Göttingen, Göttingen, Germany
| | - Michael Gale
- Department of Immunology, University of Washington, Seattle, Washington, USA
| | - Tero Aittokallio
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
- Oslo Centre for Biostatistics and Epidemiology, University of Oslo and Oslo University Hospital, Oslo, Norway
| | - Joshua T. Schiffer
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
- Division of Allergy and Infectious Disease, University of Washington, Seattle, Washington, USA
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Judith M. White
- Department of Cell Biology, University of Virginia, Charlottesville, Virginia, USA
- Department of Microbiology, University of Virginia, Charlottesville, Virginia, USA
| | - Stephen J. Polyak
- Virology Division, Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
- Department of Microbiology, University of Washington, Seattle, Washington, USA
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Herring S, Oda JM, Wagoner J, Kirchmeier D, O'Connor A, Nelson EA, Huang Q, Liang Y, DeWald LE, Johansen LM, Glass PJ, Olinger GG, Ianevski A, Aittokallio T, Paine MF, Fink SL, White JM, Polyak SJ. Inhibition of Arenaviruses by Combinations of Orally Available Approved Drugs. Antimicrob Agents Chemother 2021; 65:e01146-20. [PMID: 33468464 PMCID: PMC8097473 DOI: 10.1128/aac.01146-20] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 12/24/2020] [Indexed: 02/07/2023] Open
Abstract
Neglected diseases caused by arenaviruses such as Lassa virus (LASV) and filoviruses like Ebola virus (EBOV) primarily afflict resource-limited countries, where antiviral drug development is often minimal. Previous studies have shown that many approved drugs developed for other clinical indications inhibit EBOV and LASV and that combinations of these drugs provide synergistic suppression of EBOV, often by blocking discrete steps in virus entry. We hypothesize that repurposing of combinations of orally administered approved drugs provides effective suppression of arenaviruses. In this report, we demonstrate that arbidol, an approved influenza antiviral previously shown to inhibit EBOV, LASV, and many other viruses, inhibits murine leukemia virus (MLV) reporter viruses pseudotyped with the fusion glycoproteins (GPs) of other arenaviruses (Junin virus [JUNV], lymphocytic choriomeningitis virus [LCMV], and Pichinde virus [PICV]). Arbidol and other approved drugs, including aripiprazole, amodiaquine, sertraline, and niclosamide, also inhibit infection of cells by infectious PICV, and arbidol, sertraline, and niclosamide inhibit infectious LASV. Combining arbidol with aripiprazole or sertraline results in the synergistic suppression of LASV and JUNV GP-bearing pseudoviruses. This proof-of-concept study shows that arenavirus infection in vitro can be synergistically inhibited by combinations of approved drugs. This approach may lead to a proactive strategy with which to prepare for and control known and new arenavirus outbreaks.
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Affiliation(s)
- Shawn Herring
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Jessica M Oda
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Jessica Wagoner
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Delaney Kirchmeier
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Aidan O'Connor
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Elizabeth A Nelson
- Department of Cell Biology, University of Virginia, Charlottesville, Virginia, USA
| | - Qinfeng Huang
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Twin Cities, Minnesota, USA
| | - Yuying Liang
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Twin Cities, Minnesota, USA
| | - Lisa Evans DeWald
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | | | - Pamela J Glass
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | | | - Aleksandr Ianevski
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
| | - Tero Aittokallio
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland
- Oslo Centre for Biostatistics and Epidemiology (OCBE), University of Oslo, Oslo, Norway
- Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - Mary F Paine
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington, USA
| | - Susan L Fink
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Judith M White
- Department of Cell Biology, University of Virginia, Charlottesville, Virginia, USA
- Department of Microbiology, University of Virginia, Charlottesville, Virginia, USA
| | - Stephen J Polyak
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
- Department of Global Health, University of Washington, Seattle, Washington, USA
- Department of Microbiology, University of Washington, Seattle, Washington, USA
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Affiliation(s)
- Michael Todosow
- Brookhaven National Laboratory, P.O. Box 5000 Upton, New York 11973
| | - A. Galperin
- Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - S. Herring
- Idaho National Engineering and Environmental Laboratory Idaho Falls, Idaho
| | - M. Kazimi
- Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - T. Downar
- Purdue University, West Lafayette, Indiana
| | - A. Morozov
- Russian Research Centre-Kurchatov Institute, Moscow, Russia
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Affiliation(s)
- S Herring
- Grifols Biologicals Incorporated, Los Angeles, CA 90032, USA.
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Yeh K, Popowics T, Rafferty K, Herring S, Egbert M. The effects of tooth extraction on alveolar bone biomechanics in the miniature pig, Sus scrofa. Arch Oral Biol 2010; 55:663-9. [PMID: 20580345 DOI: 10.1016/j.archoralbio.2010.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2010] [Revised: 05/21/2010] [Accepted: 05/24/2010] [Indexed: 11/17/2022]
Abstract
OBJECTIVE This study investigated the role of occlusion in the development of biomechanical properties of alveolar bone in the miniature pig, Sus scrofa. The hypothesis tested was that the tissues supporting an occluding tooth would show greater stiffness and less strain than that of a non-occluding tooth. DESIGN Maxillary teeth opposing the erupting lower first molar (M(1)) were extracted on one side. Occlusion developed on the contralateral side. Serially administered fluorochrome labels tracked bone mineralisation apposition rate (MAR). A terminal experiment measured in vivo buccal alveolar bone strain on occluding and non-occluding sides during mastication. Ex vivo alveolar strains during occlusal loading were subsequently measured using a materials testing machine (MTS/Sintech). Whole specimen stiffness and principal strains were calculated. RESULTS MAR tended to be higher on the extraction side during occlusion. In vivo buccal shear strains were higher in the alveolar bone of the occluding side vs. the extraction side (mean of 471 microvarepsilon vs. 281 microvarepsilon, respectively; p=0.04); however, ex vivo shear strains showed no significant differences between sides. Stiffness differed between extraction and occlusion side specimens, significantly so in the low load range (344 vs. 668 MPa, respectively; p=0.04). CONCLUSIONS Greater in vivo shear strains may indicate more forceful chews on the occluding side, whereas the similarity in ex vivo bone strain magnitude suggests a similarity in alveolar bone structure and occlusal load transmission regardless of occlusal status. The big overall change in specimen stiffness that was observed was likely attributable to differences in the periodontal ligament rather than alveolar bone.
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Affiliation(s)
- K Yeh
- Department of Oral Biology, University of Washington, Seattle, WA 98195, United States
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Affiliation(s)
- R J Echemendia
- Psychological and Neurobehavioral Associates, Inc, 204 East Calder Way, St 205, State College, Pennsylvania 16801, USA.
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Herring S, Gray K, Taffe J, Tonge B, Sweeney D, Einfeld S. Behaviour and emotional problems in toddlers with pervasive developmental disorders and developmental delay: associations with parental mental health and family functioning. J Intellect Disabil Res 2006; 50:874-82. [PMID: 17100948 DOI: 10.1111/j.1365-2788.2006.00904.x] [Citation(s) in RCA: 256] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
BACKGROUND Behavioural and emotional problems occur at a high rate in children and adolescents with intellectual disability, often from a young age. Some studies have indicated that children and adolescents with autism present with even higher rates. Less is known about the presentation, development and family impact of these difficulties in young children with autism. This study aimed to explore these issues in toddlers with pervasive developmental disorders (PDDs), those with delay without a PDD, and their families. METHODS Participants were 123 children aged 20-51 months, referred to a developmental assessment clinic. Parents completed a checklist on child behavioural and emotional problems, and individual questionnaires on family functioning, their own mental health, and stress in relation to parenting their child. The child's language and cognitive skills, adaptive functioning and behaviour were assessed by standardized measures. Measures were repeated 1 year postdiagnosis. Behavioural and emotional problems in young children with a PDD were compared with those in children with developmental delay without a PDD, and their impact on parental outcomes explored over time. RESULTS Initial and follow-up measures of child behaviour and emotional problems, parent mental health problems, parent stress and family functioning were significantly correlated, providing some evidence of stability over time. Child emotional and behavioural problems contributed significantly more to mother stress, parent mental health problems, and perceived family dysfunction than child diagnosis (PDD/non-PDD), delay or gender. Compared with mothers, all fathers reported significantly less stress in relation to parenting their child. CONCLUSION Results highlighted the importance of addressing emotional and behavioural problems in very young children with autism and/or developmental delay. The need for early support and intervention for mothers, fathers and families in this context was also evidenced. As research has shown that behavioural and emotional problems persist into adolescence and young adulthood, understanding of these issues in very young children and their parents has important implications for intervention and long-term outcomes.
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Affiliation(s)
- S Herring
- Monash University, Centre for Developmental Psychiatry & Psychology, School of Psychology, Psychiatry & Psychological Medicine, Clayton, Vic., Australia
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Stathopoulos C, Ahel I, Ali K, Ambrogelly A, Becker H, Bunjun S, Feng L, Herring S, Jacquin-Becker C, Kobayashi H, Korencic D, Krett B, Mejlhede N, Min B, Nakano H, Namgoong S, Polycarpo C, Raczniak G, Rinehart J, Rosas-Sandoval G, Ruan B, Sabina J, Sauerwald A, Toogood H, Tumbula-Hansen D, Ibba M, Söll D. Aminoacyl-tRNA synthesis: a postgenomic perspective. Cold Spring Harb Symp Quant Biol 2003; 66:175-83. [PMID: 12762020 DOI: 10.1101/sqb.2001.66.175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- C Stathopoulos
- Departments of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520-8114, USA
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9
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Boss E, Twardowski MS, Herring S. Shape of the particulate beam attenuation spectrum and its inversion to obtain the shape of the particulate size distribution. Appl Opt 2001; 40:4885-4893. [PMID: 18360531 DOI: 10.1364/ao.40.004885] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The link between the spectral shape of the beam attenuation spectrum and the shape of the particle size distribution (PSD) of oceanic particles is revisited to evaluate the extent to which one can be predicted from the other. Assuming a hyperbolic (power-law) PSD, N(D) ? D(-xi), past studies have found for an infinite distribution of nonabsorbing spheres with a constant index of refraction that the attenuation spectrum is hyperbolic and that the attenuation spectral slope gamma is related to the PSD slope xi by xi = gamma + 3. Here we add a correction to this model because of the finite size of the biggest particle in the population. This inversion model is given by xi = gamma + 3 - 0.5 exp(-6gamma). In most oceanic observations xi > 3, and the deviation between these two models is negligible. To test the robustness of this inversion, we perturbed its assumptions by allowing for populations of particles that are nonspherical, or absorbing, or with an index of refraction that changes with wavelength. We found the model to provide a good fit for the range of parameters most often encountered in the ocean. In addition, we found that the particulate attenuation spectrum, c(p)(lambda), is well described by a hyperbolic relation to the wavelength c(p) ? lambda(-gamma) throughout the range of the investigated parameters, even when the inversion model does not apply. This implies that knowledge of the particulate attenuation at two visible wavelengths could provide, to a high degree of accuracy, the particulate attenuation at other wavelengths in the visible spectrum.
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Abstract
The kinetics of J-aggregate formation has been studied for two chromophores, tetrakis-4-sulfonatophenylporphine in an acid medium and pseudoisocyanine on a polyvinylsulfonate template. The assembly processes differ both in their sensitivity to initiation protocols and in the reaction profiles they produce. The porphyrin's assembly kinetics, for example, displays an induction period unlike that of the cyanine dye. Two kinetic models are presented. For the porphyrin, an autocatalytic pathway in which the formation of an aggregation nucleus is rate-determining appears to be applicable; for the pseudoisocyanine dye, an equation derived for diffusion-limited aggregation of a fractal object satisfactorily fits the data. These models are shown to be useful for the analysis of kinetic data obtained for several biologically important aggregation processes.
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Affiliation(s)
- R F Pasternack
- Department of Chemistry, Swarthmore College, Swarthmore Pennsylvania 19081, USA
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Abstract
Eggs of two small Australian lizards, Lampropholis guichenoti and Bassiana duperreyi, were incubated to hatching at 25 degrees C and 30 degrees C. Incubation periods were significantly longer at 25 degrees C in both species, and temperature had a greater effect on the incubation period of B. duperreyi (41.0 days at 25 degrees C; 23.1 days at 30 degrees C) than L. guichenoti (40.1 days at 25 degrees C; 27.7 days at 30 degrees C). Patterns of oxygen consumption were similar in both species at both temperatures, being sigmoidal in shape with a fall in the rate of oxygen consumption just prior to hatching. The higher incubation temperature resulted in higher peak and higher prehatch rates of oxygen consumption in both species. Total amount of oxygen consumed during incubation was independent of temperature in B. duperreyi, in which approximately 50 ml oxygen was consumed at both temperatures, but eggs of L. guichenoti incubated at 30 degrees C consumed significantly more (32.6 ml) than eggs incubated at 25 degrees C (28.5 ml). Hatchling mass was unaffected by either incubation temperature or the amount of water absorbed by eggs during incubation in both species. The energetic production cost of hatchling B. duperreyi (3.52 kJ x g(-1)) was independent of incubation temperature, whereas in L. guichenoti the production cost was greater at 30 degrees C (4.00 kJ x g(-1)) than at 25 degrees C (3.47 kJ g(-1)). Snout-vent lengths and mass of hatchlings were unaffected by incubation temperature in both species, but hatchling B. duperreyi incubated at 30 degrees C had longer tails (29.3 mm) than those from eggs incubated at 25 degrees C (26.2 mm). These results indicate that incubation temperature can affect the quality of hatchling lizards in terms of embryonic energy consumption and hatchling morphology.
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Affiliation(s)
- D T Booth
- Department of Zoology and Entomology, The University of Queensland, Australia.
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Horlander JC, Boyle N, Manam R, Schenk M, Herring S, Kwo PY, Lumeng L, Chalasani N. Vaccination against hepatitis B in patients with chronic liver disease awaiting liver transplantation. Am J Med Sci 1999; 318:304-7. [PMID: 10555092 DOI: 10.1097/00000441-199911000-00004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Most transplant centers in the United States immunize patients awaiting liver transplantation against hepatitis B to prevent acquisition of hepatitis B through transplantation (de novo hepatitis B). A recent study showed that only 16% of patients with cirrhosis awaiting liver transplantation responded to single-dose recombinant vaccine. METHODS We studied the immunogenicity of double-dose recombinant vaccine in patients with cirrhosis awaiting liver transplantation. RESULTS Over a 4-year period (January 1994 to December 1997), 140 patients with cirrhosis without past or current hepatitis B infection were given double-dose recombinant vaccine (40 microg of Engerix B; SmithKline Beecham, Philadelphia, PA) at 0, 1 to 2, and 2 to 4 months. Hepatitis B surface antibody (HBsAb) was measured 1 to 3 months after completing vaccination. The response rate was 37%. However, HBsAb titers became undetectable in 35% of the responders during the post-transplant follow-up period. One hundred and thirty-seven patients underwent 144 liver transplantation procedures during the study period, and 3 patients developed de novo hepatitis B (2.2%). Livers transplanted from hepatitis B core antibody (HBcAb)-positive donors was the source of de novo hepatitis B in all cases. Two of the 3 patients who developed de novo hepatitis B were immunized before transplantation and one of them was a responder. CONCLUSION Although the response rate to double-dose recombinant vaccines is higher than the previously reported response to single-dose vaccine, it still is less than optimal.
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Affiliation(s)
- J C Horlander
- Department of Medicine, Indiana University School of Medicine, Indianapolis 46202, USA
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13
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Steiner D, El-Guebaly L, Herring S, Khater H, Mogahed E, Thayer R, Tillack M. ARIES-RS safety design and analysis. Fusion Engineering and Design 1997. [DOI: 10.1016/s0920-3796(97)00116-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Marks L, Teng S, Artun J, Herring S. Reaction strains on the condylar neck during mastication and maximum muscle stimulation in different condylar positions: an experimental study in the miniature pig. J Dent Res 1997; 76:1412-20. [PMID: 9207775 DOI: 10.1177/00220345970760071201] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Most researchers agree that the primate temporomandibular joint (TMJ) is loaded compressively during function and that condylar position must play a role in mediating such loads. However, the precise nature of that role remains unclear. Using a pig model in this study, we attempted to analyze strain on the neck of the condyle during normal mastication and during simulated function in different condylar positions. Miniature three-element rosette strain gauges were bonded to the lateral surface of the condylar neck in 4 female miniature pigs (one per condyle). Measurements of strain were made during normal mastication and with the pigs under general anesthesia during maximum stimulation of the masseter and temporalis muscles in each of five condylar positions--centric occlusion, centric relation, anterior, relaxed and wide open--established through use of acrylic splints. Condylar position was evaluated by superimposition of lateral and dorsoventral cephalograms, with measurement of horizontal and vertical changes in location of implants placed on the zygomatic arch. As in primates, the TMJ was found to be load-bearing during mastication, with compressive strain oriented approximately perpendicular to the occlusal plane. In 3 pigs, strain was higher during balancing than during working function. During stimulation, the TMJ reaction strains were significantly lower with the condyles in the anterior position compared with the other positions, and the compressive strain was directed more anteriorly along the neck of the condyle in that position.
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Affiliation(s)
- L Marks
- University of Washington Department of Orthodontics, Seattle, USA
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15
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Drangsholt MT, LeResche L, Ramsey DS, Herring S, Dworkin SF. Comments on pediatric internal derangements. Am J Orthod Dentofacial Orthop 1994; 105:38A-39A. [PMID: 8185736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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16
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Farley JR, Hall SL, Herring S, Libanati C, Wergedal JE. Reference standards for quantification of skeletal alkaline phosphatase activity in serum by heat inactivation and lectin precipitation. Clin Chem 1993; 39:1878-84. [PMID: 8375064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Putative standards of skeletal alkaline phosphatase (ALP) (from bone, bone cells, osteosarcoma cells, and Pagetic serum) and hepatic ALP (from cholestatic serum and bile) were used to compare three methods for quantifying skeletal ALP activity in serum: heat inactivation, precipitation with wheat germ agglutinin (WGA), and precipitation with concanavalin A (Con A). All the skeletal ALP standards were similarly sensitive to heat inactivation, as were the hepatic ALP standards. Heat inactivation separated skeletal from hepatic ALP by a 50% difference in remaining ALP activities (e.g., 23% and 74% remaining skeletal and hepatic ALP activities after 30 min at 52 degrees C). Differential precipitations with WGA and with Con A were less efficient at separating skeletal from hepatic ALP (maximum differences of < 30% remaining ALP activity). Although both types of hepatic ALP standard (cholestatic serum and bile) were precipitated with similar efficiencies by WGA and Con A, the skeletal ALP standards were not (e.g., at 2.7 g/L, WGA precipitated 78-86% of the ALP activity in Pagetic serum, but only 49% of the ALP activity in extracts of human bone). These data suggest that heat inactivation is preferable to precipitation with WGA or Con A for quantifying skeletal ALP activity in serum: it better separates skeletal from hepatic ALP activity and is not sensitive to glycosyl heterogeneity.
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, CA
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17
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Farley JR, Hall SL, Herring S, Libanati C, Wergedal JE. Reference standards for quantification of skeletal alkaline phosphatase activity in serum by heat inactivation and lectin precipitation. Clin Chem 1993. [DOI: 10.1093/clinchem/39.9.1878] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Putative standards of skeletal alkaline phosphatase (ALP) (from bone, bone cells, osteosarcoma cells, and Pagetic serum) and hepatic ALP (from cholestatic serum and bile) were used to compare three methods for quantifying skeletal ALP activity in serum: heat inactivation, precipitation with wheat germ agglutinin (WGA), and precipitation with concanavalin A (Con A). All the skeletal ALP standards were similarly sensitive to heat inactivation, as were the hepatic ALP standards. Heat inactivation separated skeletal from hepatic ALP by a 50% difference in remaining ALP activities (e.g., 23% and 74% remaining skeletal and hepatic ALP activities after 30 min at 52 degrees C). Differential precipitations with WGA and with Con A were less efficient at separating skeletal from hepatic ALP (maximum differences of < 30% remaining ALP activity). Although both types of hepatic ALP standard (cholestatic serum and bile) were precipitated with similar efficiencies by WGA and Con A, the skeletal ALP standards were not (e.g., at 2.7 g/L, WGA precipitated 78-86% of the ALP activity in Pagetic serum, but only 49% of the ALP activity in extracts of human bone). These data suggest that heat inactivation is preferable to precipitation with WGA or Con A for quantifying skeletal ALP activity in serum: it better separates skeletal from hepatic ALP activity and is not sensitive to glycosyl heterogeneity.
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, CA
| | - S L Hall
- Department of Medicine, Loma Linda University, CA
| | - S Herring
- Department of Medicine, Loma Linda University, CA
| | - C Libanati
- Department of Medicine, Loma Linda University, CA
| | - J E Wergedal
- Department of Medicine, Loma Linda University, CA
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18
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Abstract
Previous in vitro studies have shown that the effect of fluoride to increase avian osteoblast-like cell proliferation was dependent on the phosphate concentration. In vitro studies have further revealed that fluoride could also have direct effects on osteoblast-like cells to increase phosphate uptake and transiently increase cytosolic calcium. The current studies were intended to determine whether fluoride could increase net 45Ca uptake by human osteosarcoma (SaOS-2) cells and, if so, whether those effects would also be phosphate dependent. The results of these studies indicate that fluoride increased net 45Ca uptake by SaOS-2 cells, with biphasic dose and time dependencies. After 30 minutes of exposure, net 45Ca uptake was increased to a greater extent by 50 microM fluoride (217 +/- 16% of control, P < 0.001) than by 200 microM fluoride; and the stimulatory effect of 100 microM fluoride on net 45Ca uptake was greater after 20 minutes (187 +/- 22% of control, P < 0.001) than after 60 minutes (122 +/- 7% of control, P < 0.05). These effects of fluoride to increase net 45Ca uptake were dependent on the phosphate concentration in the medium. Fluoride had no effect on net 45Ca uptake in medium containing 0.4 mM phosphate, but increased net 45Ca uptake in medium containing 1.2 or 2.0 mM phosphate (P < 0.005). As the phosphate concentration was increased, the biphasic fluoride dose-response curve was shifted to a lower range of fluoride concentrations.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, California
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19
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Abstract
Although the primary skeletal action of exogenous calcitonin is to inhibit bone resorption, calcitonin also has effects on bone formation. In-vitro data indicate that the latter may include direct effects on bone cells of osteoblastic lineage. In the current studies, we examined the effects of calcitonin on cyclic adenosine monophosphate (cAMP) and PGE2 synthesis and 45Ca uptake in human osteosarcoma cells, specifically, TE-85 cells and subpopulations of SaOS-2 cells with low-, intermediate-, and high-steady-state levels of skeletal alkaline phosphatase (ALP) activity. Since previous in-vivo studies had shown that calcitonin could acutely decrease skeletal ALP activity in rat periosteal osteoblasts, we also measured the effects of calcitonin treatment on ALP specific activity. Neither salmon nor human calcitonin altered the net synthesis of cAMP or PGE2 by SaOS-2 cells, but human calcitonin gene-related peptide increased both (P < .001 and P < .005, respectively). Both salmon and human calcitonin had short-term effects to alter ALP activity in TE-85 and SaOS-2 cells. The effects were different in SaOS-2 subpopulations with different pretreatment ALP levels. Four hours of exposure to salmon calcitonin had dose-dependent, biphasic effects on ALP levels in SaOS-2 cells with intermediate pretreatment ALP levels, increasing ALP at doses between 0.16 and 1.6 nmol/L (P < .005) and decreasing ALP at higher concentrations (P < .05). Both salmon and human calcitonin, but not human calcitonin gene-related peptide, also had short-term effects to increase net 45Ca uptake by SaOS-2 cells; these effects were dose-dependent and long-lasting.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, CA
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20
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Affiliation(s)
- C McAuley
- Alpha Therapeutic Corporation, Los Angeles, CA 90032
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21
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Sola OM, Herring S, Zhang G, Huang X, Hayashida N, Haines LC, Thomas R, Kakulas BA, Sauvage LR. Significance of the biopsy site of the latissimus dorsi muscle for fiber typing. J Heart Lung Transplant 1992; 11:S315-9. [PMID: 1420223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The use of the latissimus dorsi muscle for cardiomyoplasty requires accurate assessment of the outcome of methods used to convert fast fibers to slow fibers. A knowledge of the normal distribution pattern of slow fibers within the latissimus dorsi is necessary for this endeavor. Fresh latissimus dorsi and teres major muscle tissues from seven pigs, one rabbit, two sheep, one monkey, and four dogs were studied with myosin adenosine triphosphatase staining. Fiber counts were made visually. With the exception of the rabbit, the distribution patterns were similar for all species: (1) intersegmentally--the number of slow fibers decreased steadily from the teres major to the anterior edge of the lateral segment; (2) intrasegmentally--slow fibers were more frequent in the deep layer than the superficial layer; and (3) intrasegmentally--the slow fibers tended to cluster in rosette formations around the neurovascular bundles. These patterns of distribution indicate the need for careful location of biopsies to ensure valid comparison of the amount of slow fibers in tissue before and after treatment.
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Affiliation(s)
- O M Sola
- Hope Heart Institute, Seattle, WA 98122
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22
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Abstract
Pursuing the hypothesis that quantitation of skeletal alkaline phosphatase (ALP) activity in canine serum would provide an index of the rate of bone formation, we compared three methods for isoenzyme-specific identification of skeletal ALP activity in canine serum: heat inactivation, wheat germ agglutinin (WGA) precipitation, and concanavalin A (ConA) precipitation. ALP isoenzyme activities were extracted from canine bone, intestine, and liver, diluted into heat-inactivated canine serum (i.e., serum without ALP activity), and used as calibrators of ALP isoenzyme activities. Differential sensitivity to inhibition by 10 mM L-homoarginine was used to distinguish intestinal ALP activity from hepatic and skeletal ALP activities (i.e., 9, 80, and 72% inhibition, respectively). To allow resolution of skeletal ALP activity from hepatic ALP activity, we tested two established methods (heat inactivation and WGA precipitation) and a novel method, ConA precipitation. The organ-derived skeletal and hepatic ALP isoenzyme activities were used to compare these three methods with respect to linearity, isoenzyme separation, and precision. All three methods were linear, but the WGA and ConA methods afforded greater isoenzyme separation and precision. The relative extent of isoenzyme separation (i.e., the difference in percentage remaining skeletal and hepatic ALP isoenzyme activities) averaged 23, 40, and 47% remaining ALP activity for the heat, WGA, and ConA methods, respectively. However, when these methods were applied to the quantitation of skeletal ALP activity in sera from 10 young and 10 adult beagles, the WGA method was found to be unacceptable because most of the results fell outside the range of the WGA assay calibrators (i.e., greater than 100% skeletal ALP activity). The heat and ConA methods showed that the amount of skeletal ALP activity in the beagle sera decreased with age, both as ALP activity per liter and as percentage of total serum ALP activity (p less than 0.001 for each). Skeletal ALP activity levels determined by ConA were correlated with values determined by heat inactivation (r = 0.87, p less than 0.001) but not with WGA-determined levels (r = 0.26). Intestinal ALP activity was detected in only 1 of these 20 sera. We conclude that ConA precipitation can be used for quantitation of skeletal ALP activity in beagle serum.
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, California
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23
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Abstract
In a series of four studies, adult female Swiss-Webster mice were used to measure the effects of salmon calcitonin on two biochemical indices of local and systematic bone formation: (1) skeletal alkaline phosphatase activity--in serum and in extracts of calvaria and tibiae, and (2) calvarial collagenase-digestible protein synthesis--measured, acutely, in vitro. Subcutaneous calcitonin doses ranged from 50 to 400 mU/mouse/day (0.95-18.1 U/kg/day), and treatment schedules were continuous (daily) for 2-14 days, acute, or intermittent (2 days/week for 6 weeks). The effects of calcitonin on these bone formation indices (skeletal alkaline phosphatase and collagenase-digestible protein synthesis) were biphasic with respect to dose and treatment time, being increased in response to short-term, low-dose treatment, but not long-term, continuous treatment. The effects of long-term intermittent calcitonin treatment were dose-dependent increases in skeletal alkaline phosphatase in calvaria and serum (r = 0.948, P less than 0.02, and r = 0.960, P less than 0.01, respectively).
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, California
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24
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Sze A, Sviatoslavsky I, Sawan M, Gierszewski P, Hollies R, Sharafat S, Herring S. Organic coolant for ARIES-III. Fusion Engineering and Design 1991. [DOI: 10.1016/0920-3796(91)90160-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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25
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Farley JR, Hall SL, Herring S, Tarbaux NM, Matsuyama T, Wergedal JE. Skeletal alkaline phosphatase specific activity is an index of the osteoblastic phenotype in subpopulations of the human osteosarcoma cell line SaOS-2. Metabolism 1991; 40:664-71. [PMID: 1651438 DOI: 10.1016/0026-0495(91)90081-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
During continuous culture with serial passage, the human osteosarcoma cell line SaOS-2 showed a time-dependent decrease in skeletal alkaline phosphatase (ALP) activity. Because this was indicative of heterogeneity, subpopulations of SaOS-2 cells were isolated from replicate low-density cultures. The subpopulations were less heterogeneous and more stable (with respect to ALP) than the parent population. ALP specific activity in the subpopulations ranged from 0.05 to 2.3 U/mg protein, and cytochemical analyses indicated multiple steady-state levels of ALP activity per cell. The amount of ALP activity in SaOS-2 subpopulations was proportional to collagen production ([3H]proline incorporation into collagenase-digestible protein; r = .84, P less than .005), and to parathyroid hormone (PTH)-linked synthesis of cyclic adenosine monophosphate (cAMP) (r = .88, P less than .01). From these data, we inferred that ALP activity in SaOS-2 cells can provide a useful index of the osteoblastic phenotype, and that ALP activity, collagen production, and PTH-linked adenylate cyclase were coordinately regulated in these osteoblast-like osteosarcoma cells (ie, selection of subpopulations for ALP activity coselected for collagen synthesis and PTH-linked synthesis of cAMP). Further comparative studies showed that micromolar fluoride concentrations stimulated cell proliferation ([3H]thymidine incorporation into DNA) in low-ALP SaOS-2 subpopulations, but not in high-ALP cells (P less than .001), and that this differential sensitivity to fluoride was associated with an inverse correlation between fluoride-sensitive acid phosphatase and ALP activities (r = -.91, P less than .001).
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, CA
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26
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Farley JR, Wergedal JE, Hall SL, Herring S, Tarbaux NM. Calcitonin has direct effects on 3[H]-thymidine incorporation and alkaline phosphatase activity in human osteoblast-line cells. Calcif Tissue Int 1991; 48:297-301. [PMID: 2054713 DOI: 10.1007/bf02556147] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Calcitonin had direct and dose-dependent actions on human osteoblast-line cells (in serum-free monolayer culture) to increase cell proliferation and alkaline phosphatase activity/mg cell protein. Salmon calcitonin increased (human osteosarcoma) SaOS-2 cell proliferation, as evidenced by dose-dependent increases in 3[H]-thymidine incorporation into DNA (e.g., 153% of control after 20 h exposure at 0.1 nM, P less than 0.01), and MTT (thyzolyl blue) reduction/deposition (e.g., 161% of control after 72 h exposure at 0.03 nM). Continuous exposure was not required to elicit these proliferative responses. These effects were not unique to salmon calcitonin or to SaOS-2 cells. Similar effects were seen with human calcitonin (but not heat-inactivated human calcitonin) and with (human osteosarcoma) TE-85 cells and human osteoblast-line cells prepared from femoral heads. In addition to effects on cell proliferation, calcitonin also increased alkaline phosphatase-specific activity in SaOS-2 cells (e.g., 180% of control after 72 h of exposure to 0.1 nM salmon calcitonin, P less than .005).
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Affiliation(s)
- J R Farley
- Department of Medicine, Loma Linda University, CA
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27
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Vieweg V, Glick JL, Herring S, Kerler R, Godleski LS, Barber J, Yank G, Spradlin W. Absence of carbamazepine-induced hyponatremia among patients also given lithium. Am J Psychiatry 1987; 144:943-7. [PMID: 3605408 DOI: 10.1176/ajp.144.7.943] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Of 33 chronically psychotic patients in a state hospital, 17 received carbamazepine, 13 received carbamazepine and lithium, and three received carbamazepine and then the combination. There was a significant difference in serum sodium level between the patients receiving carbamazepine alone (mean +/- SD = 138.4 +/- 4.3 meq/liter) and those also receiving lithium (141.8 +/- 1.6 meq/liter). (A similar difference was seen for the patients who received the two treatments serially.) Age, sex, diagnosis, age at diagnosis, seizure disorder, antipsychotic drugs, and serum carbamazepine level did not explain this difference. The protection against hyponatremia provided by the carbamazepine-lithium combination occurred despite lithium's tendency to increase polyuria.
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Herring S, Reitan RM. Sex similarities in verbal and performance IQ deficits following unilateral cerebral lesions. J Consult Clin Psychol 1986. [PMID: 3745608 DOI: 10.1037//0022-006x.54.4.537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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30
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Abstract
Many psychologists have been interested in the development of a screening battery for cerebral dysfunction. The purpose of the present study was to identify a short screening battery, drawn from the Halstead-Reitan Battery, that had a high degree of accuracy in differential identification of brain-damage and normal children. Fifty brain-damaged children and 50 controls (age 9-14 years) were identified and subdivided into two groups of 25 children in each category. The data based on the first pair of groups (25 brain-damaged and 25 control children) were processed with a discriminant analysis with linear transformation of the results, and a weighted screening index was developed based on eight measures. This screening index had an accuracy rate of 92% in differentiating the brain-damaged subjects from the controls. The screening index then was applied to the validational groups (25 brain-damaged and 25 normal children), and an 86% accuracy rate was achieved. Computation of the screening index, which requires less than an hour of testing, is illustrated in this paper.
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Herring S, McGeady SJ, Jones JD, Mansmann HC. The maintenance of pets in allergic families. I. A survey of health beliefs. Ann Allergy 1981; 46:24-9. [PMID: 7458008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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