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Articles 15871 - 15882 of 15882
Full-Text Articles in Entire DC Network
A Microinjected Monoclonal Antibody Against Human Dna Polymerase-Alpha Inhibits Dna Replication In Human, Hamster, And Mouse Cell Lines., L Kaczmarek, M R Miller, R A Hammond, W E Mercer
A Microinjected Monoclonal Antibody Against Human Dna Polymerase-Alpha Inhibits Dna Replication In Human, Hamster, And Mouse Cell Lines., L Kaczmarek, M R Miller, R A Hammond, W E Mercer
Faculty & Staff Scholarship
No abstract provided.
Recognition And Characterization Of Stage-Specific Oocyst/Sporozoite Antigens Of Toxoplasma Gondii By Human Antisera., Lloyd H. Kasper, Patricia L. Ware
Recognition And Characterization Of Stage-Specific Oocyst/Sporozoite Antigens Of Toxoplasma Gondii By Human Antisera., Lloyd H. Kasper, Patricia L. Ware
Dartmouth Scholarship
Human infection with Toxoplasma gondii is presumed due to the ingestion of either tissue cysts containing bradyzoites or oocyst/sporozoites that are excreted in the feces of infected cats. The incidence of human infection in the general population by either of these routes is unknown. We have previously described unique stage-specific oocyst/sporozoite antigens identified by murine hybridoma monoclonal antibodies. We obtained acute and convalescent antitoxoplasma antisera from patients in an epidemiologically well-documented outbreak of oocyst-transmitted infection associated with the ingestion of contaminated water. An enzyme-linked immunosorbent assay comparing equal numbers of tachyzoites (invasive stage) and oocyst/sporozoite (excreted stage) indicated that these …
The Frequency Of Vestibular Disorders In Developmentally Delayed Preschoolers With Otitis Media., Roseann C Schaaf
The Frequency Of Vestibular Disorders In Developmentally Delayed Preschoolers With Otitis Media., Roseann C Schaaf
Department of Occupational Therapy Faculty Papers
This study investigated the frequency of vestibular disorders in developmentally disabled preschoolers who did and who did not have a history of otitis media. Fifteen children with a history of otitis media and fifteen children with no history of otitis media were given two tests for vestibular functioning: the Southern California Postrotary Nystagmus Test (SCPNT) and the Lateral Labyrinthine Righting Reaction (LLRR), acting on the head. The scores on these tests were dichotomized, and a correlation between these two tests as measures of vestibular function was obtained. Because this correlation did not reach a satisfactory level, two a satisfactory level, …
Heterogeneity Of Clonogenic Cells In Acute Myeloblastic Leukemia., Kert D. Sabbath, Edward D. Ball, Peter Larcom, Roger B. Davis, James D. Griffin
Heterogeneity Of Clonogenic Cells In Acute Myeloblastic Leukemia., Kert D. Sabbath, Edward D. Ball, Peter Larcom, Roger B. Davis, James D. Griffin
Dartmouth Scholarship
The expression of differentiation-associated surface antigens by the clonogenic leukemic cells from 20 patients with acute myeloblastic leukemia (AML) was studied with a panel of seven cytotoxic monoclonal antibodies (anti-Ia, -MY9, -PM-81, -AML-2-23, -Mol, -Mo2, and -MY3). The surface antigen phenotypes of the clonogenic cells were compared with the phenotypes of the whole leukemic cell population, and with the phenotypes of normal hematopoietic progenitor cells. In each case the clonogenic leukemic cells were found within a distinct subpopulation that was less "differentiated" than the total cell population. Clonogenic leukemic cells from different patients could be divided into three phenotype groups. …
Genetics And Epidemiology Of Gallbladder Disease In New World Native Peoples, K M Weiss, R E Ferrell, C L Hanis, P N Styne
Genetics And Epidemiology Of Gallbladder Disease In New World Native Peoples, K M Weiss, R E Ferrell, C L Hanis, P N Styne
Faculty, Staff and Student Publications
Native peoples of the New World, including Amerindians and admixed Latin Americans such as Mexican-Americans, are highly susceptible to diseases of the gallbladder. These include cholesterol cholelithiasis (gallstones) and its complications, as well as cancer of the gallbladder. Although there is clearly some necessary dietary or other environmental risk factor involved, the pattern of disease prevalence is geographically associated with the distribution of genes of aboriginal Amerindian origin, and levels of risk generally correspond to the degree of Amerindian admixture. This pattern differs from that generally associated with Westernization, which suggests a gene-environment interaction, and that within an admixed population …
Inhibition Of T Lymphocyte Mitogenesis By 1,25-Dihydroxyvitamin D3 (Calcitriol)., William F.C. Rigby, Terryl Stacy, Michael W. Fanger
Inhibition Of T Lymphocyte Mitogenesis By 1,25-Dihydroxyvitamin D3 (Calcitriol)., William F.C. Rigby, Terryl Stacy, Michael W. Fanger
Dartmouth Scholarship
Recent studies have suggested that vitamin D may have other important biologic activities in addition to its well-characterized role in the maintenance of calcium homeostasis. Discovery of cytosolic receptors for vitamin D in human peripheral blood monocytes and lectin-stimulated lymphocytes prompted us to study the effects of 1,25-dihydroxyvitamin D3 (calcitriol), the most biologically active metabolite of vitamin D, upon phytohemagglutinin (PHA)-induced lymphocyte blast transformation. We have found that calcitriol is a potent inhibitor of PHA-induced lymphocyte proliferation, achieving 70% inhibition of tritiated thymidine incorporation after 72 h in culture. Furthermore, calcitriol suppressed interleukin-2 (IL-2) production by PHA-stimulated peripheral blood mononuclear …
Gamma Interferon Induces Monocytoid Differentiation In The Hl-60 Cell Line., Edward D. Ball, Paul M. Guyre, Li Shen, John M. Glynn, Charles R. Maliszewski, Paul E. Baker, Michael W. Fanger
Gamma Interferon Induces Monocytoid Differentiation In The Hl-60 Cell Line., Edward D. Ball, Paul M. Guyre, Li Shen, John M. Glynn, Charles R. Maliszewski, Paul E. Baker, Michael W. Fanger
Dartmouth Scholarship
We investigated the ability of purified, recombinant DNA-derived interferons (IFN) to induce phenotypic changes in cells of the HL-60 promyelocytic leukemia cell line. Changes in cell surface markers detected by monoclonal antibodies as well as morphologic, histochemical, and functional changes were monitored. We found that gamma-IFN, but not alpha- or beta-IFN, induced the expression of antigens characteristic of monocytes and granulocytes (AML-2-23, 63D3, and 61D3), as well as changes in morphology consistent with monocytoid differentiation. These included induction of alpha-naphthyl acetate esterase, increased cell size, and a decrease in azurophilic granules. The gamma-IFN dose dependency and time course of the …
Recombinant Immune Interferon Increases Immunoglobulin G Fc Receptors On Cultured Human Mononuclear Phagocytes, Paul M. Guyre, Peter M. Morganelli, Renee Miller
Recombinant Immune Interferon Increases Immunoglobulin G Fc Receptors On Cultured Human Mononuclear Phagocytes, Paul M. Guyre, Peter M. Morganelli, Renee Miller
Dartmouth Scholarship
Although recent studies suggest that interferons can increase the number of IgG Fc receptor (FcR gamma) sites on mouse macrophages, direct assessment of similar effects on human mononuclear phagocytes is lacking. We therefore measured the specific binding of 125I- and fluorescein-labeled IgG1 to human monocytes and leukemic cell lines after culture in vitro with highly purified human interferons. We report that natural and recombinant human gamma-interferon causes a dramatic (nearly 10-fold) increase in the number of FcR gamma on normal human monocytes and on the human cell lines HL-60 and U-937. Alpha and beta-interferons cause a modest but significant increase …
The Roles Of Dna Polymerases Alpha, Beta, And Gamma In Dna Repair Synthesis Induced In Hamster And Human Cells By Different Dna Damaging Agents., M. R. Miller, D. N. Chinault
The Roles Of Dna Polymerases Alpha, Beta, And Gamma In Dna Repair Synthesis Induced In Hamster And Human Cells By Different Dna Damaging Agents., M. R. Miller, D. N. Chinault
Faculty & Staff Scholarship
No abstract provided.
Microtubule Dynamics And Glutathione Metabolism In Phagocytizing Human Polymorphonuclear Leukocytes., B R Burchill, J M Oliver, C B Pearson, E D Leinbach, R D Berlin
Microtubule Dynamics And Glutathione Metabolism In Phagocytizing Human Polymorphonuclear Leukocytes., B R Burchill, J M Oliver, C B Pearson, E D Leinbach, R D Berlin
SoM Articles
Glutathione oxidants such as tertiary butyl hydroperoxide were shown previously to prevent microtubule assembly and cause breakdown of preassembled cytoplasmic microtubules in human polymorphonuclear leukocytes. The objectives of the present study were to determine the temporal relationship between the attachment and ingestion of phagocytic particles and the assembly of microtubules, and simultaneously to quantify the levels of reduced glutathione and products of its oxidation as potential physiological regulators of assembly. Polymorphonuclear leukocytes from human peripheral blood were induced to phagocytize opsonized zymosan at 30 degrees C. Microtubule assembly was assessed in the electron microscope by direct counts of microtubules in …
Patterns Of Fatty Acid Release From Endogenous Substrates By Human Platelet Homogenates And Membranes, A Derksen, P Cohen
Patterns Of Fatty Acid Release From Endogenous Substrates By Human Platelet Homogenates And Membranes, A Derksen, P Cohen
Faculty, Staff and Students Publications
We describe a method for measuring the release of fatty acids from endogenous substrates of human platelet homogenates and membranes. The method depends on the availability of lipids whose fatty acids are odd-chained and therefore suitable as internal reference compounds that, at the time of lipid extraction, can be added to an incubation to permit subsequent quantification of the content of free fatty acids or fatty acids esterified to specific lipids. We found four types of lipolytic activities in human platelets. In homogenates at pH 4.0 a triglyceride lipase operated as shown by the synchrony of triglyceride degradation and release …
Chemotactic Factor Inactivator In Normal Human Serum., J L Berenberg, P A Ward
Chemotactic Factor Inactivator In Normal Human Serum., J L Berenberg, P A Ward
SoM Articles
Normal human serum contains an inactivator of chemotactic factors for neutrophilic leukocytes. The chemotactic factor inactivator (CF-I) remains soluble when serum is fractionated with ammonium sulfate (at 45% saturation), directly and irreversibly inactivates chemotactic factors, and it has a broad spectrum of activity as indicated by its inactivation of the chemotactic fragments of human C3 and C5 (third and fifth components of complement), C5̅6̅7̅, and the bacterial chemotactic factor derived from Escherichia coli. CF-I appears as a biphasic activity according to preparative techniques of sucrose density ultracentrifugation, electrophoresis, and gel filtration. Studies on the interaction of CF-I with the radiotagged …