Long-term outcome in chronic schizophrenia.
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Antipsychotic Agents↗
Biomedical subjects
F Schwartz
Publications and source records attributed to F Schwartz.
Microalbuminuria immunoassay based on antibodies covalently conjugated to Eupergit C-coated beads.
OBJECTIVE: To develop a reliable, simple, and sensitive assay for microalbuminuria, based on covalent attachment of anti-HSA to oxirane-bearing polymethylmethacrylate beads (Eupergit CB6200). RESEARCH DESIGN AND METHODS: Anti-HSA antibodies were coupled to CB6200 beads by reaction of their amino groups with the oxirane groups of the matrix. The capability of the beads to bind HSA from standard solutions or urine was evaluated and compared with the state of the art ELISA test. RESULTS: The new bead immunoassay is sensitive and linear in the range of 1-25 mg/L, which is considered the low microalbuminuria range. When HSA levels in urine were tested, the intra- and interassay CV values ranged between 2.7 and 3.9% and between 5.6 and 6.6%, respectively. The long-term storage stability of the antibodies covalently bound on the beads was higher than of the same antibodies adsorbed on ELISA plates. After 16 wk of storage, the CV was about 7.3% with the bead assay, compared with 14% obtained for the ELISA test under the same experimental conditions. CONCLUSIONS: A new procedure for microalbuminuria assay was developed, with Eupergit CB6200 beads as a solid support for covalent binding of the first antibody. Accuracy, sensitivity, reproducibility, and precision of the bead immunoassay were similar to those of commonly used immunoassays, as exemplified by the analysis of HSA in 53 clinical urine samples. The bead assay retains a low degree of variability over long storage periods, and the beads may be reapplied after a simple acid-washing procedure.
Albuminuria↗
A dominant positive and negative selectable gene for use in mammalian cells.
We have constructed three different fusion genes containing the herpes simplex virus thymidine kinase (HSV tk) and the bacterial neomycin phosphotransferase (neo) genes. All three fusion genes utilize the HSV tk promoter but differ at the junction of their components. We have determined if the fusion genes are bifunctional by introducing them into mammalian cells and testing for function of the individual components. One of the fusion genes, TNFUS 69, produced a bicistronic message and a fusion protein that has TK and NEO protein functions. This and other fusion genes of a similar nature could serve as dominant positive and negative selectable markers in mammalian cells.
Amino Acid Sequence↗
Laterality in schizophrenia. A reaction time study.
A laterality study in schizophrenia was carried out by measuring reaction time (RT) in a baseline condition and while subjects were engaged in a concurrent task. In the baseline condition, a clinical measure of psychoticism was associated with differential slowing with the right hand in schizophrenic dextrals but not in a control group of affective dextrals. The concurrent task suppressed the effect of psychoticism on RT performance. The results suggest that left-hemisphere deficits in schizophrenia are state dependent, and so not necessarily due to cortical dysfunction.
Adult↗
Negative symptoms and reaction time in schizophrenia.
This study explored the association of negative symptoms and reaction time. Negative symptoms were specifically associated with reaction time slowing and variability in schizophrenics, but not in affective disorders. The finding of specificity did not extend to other measures of the deficit syndrome nor to motor performance. An abbreviated version of the negative symptom scale was especially effective in separating groups.
Adult↗
A community-based hospice program.
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Community Health Nursing↗
Teaching employees breast self examination. Factors that may influence practice.
Breast self examination is a widely known technique used for detection of breast lumps. Many women do not practice monthly breast self examination, although it has been proven that with early detection the prognosis of breast cancer can be improved greatly. When tend to be taught, or learn about, breast self examination at an early age. The educational techniques used during the instruction can influence the practice of BSE later on. Health professionals can make a difference in the practice of BSE by communicating the value of this detection technique. BSE is a viable breast cancer detection technique that employees can be taught easily in employee wellness programs by health professionals.
Adult↗
[Incidence of insulin-dependent diabetes in six to sixteen year old school children in Lorraine].
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Adolescent↗
Enhanced activity of immobilized dimethylmaleic anhydride-protected poly- and monoclonal antibodies.
The effect of reversible protection of the free amino groups of poly- and monoclonal antibodies by dimethylmaleic anhydride on their binding activity following immobilization onto various carriers was studied. The treatment with dimethylmaleic anhydride resulted in a 1.6-1.8-fold increase in the activity of immobilized goat anti-mouse immunoglobulin antibody immobilized onto different epoxy containing carriers and a 3-10.7-fold increase in the activity of immobilized monoclonal antibodies specific for carboxypeptidase A. The increase in activity was most pronounced at low antigen to carrier loads and over a wide range of modifier to protein ratios. The application of reversible protection of antibodies may permit the development of highly active immobilized antibody preparations for use in immunoaffinity purification.
Animals↗
Enzymic oxidation of monoclonal antibodies by soluble and immobilized bifunctional enzyme complexes.
Site-specific modification of monoclonal antibodies was achieved by oxidation of the carbohydrate moieties of antibodies which are located remote from the antigen binding sites. Sialic acid and galactose are terminal sugars of these carbohydrate chains. Concomitant treatment of the antibodies with neuraminidase and galactose oxidase generated aldehyde groups in the oligosaccharide moieties of immunoglobulins which reacted selectively with amino or hydrazide groups of the matrix. Subsequent immobilization of neuraminidase and galactose oxidase on Eupergit C-adipic dihydrazide proved to be an efficient and selective system for the enzymic oxidation of the monoclonal antibodies without impairing their immunological activity. Oriented immobilization of enzymically oxidized monoclonal antibodies on hydrazide or amino Eupergit C derivatives thus leads to the formation of antibody matrix conjugates which possess high antigen-binding activities.
Antibodies, Monoclonal↗
Enzyme-linked immunosorbent assays for determination of plasma aldosterone using highly specific polyclonal antibodies.
Two enzyme-linked immunosorbent assays were established and compared for the estimation of plasma aldosterone. In the first method immobilized aldosterone-protein complexes on the ELISA plates compete with aldosterone to be determined for the binding of certain amount of anti-aldosterone antibodies. The sensitivity of this method depends on the protein carrier used to conjugate with aldosterone. In the second method, anti-aldosterone antibodies adsorbed on ELISA plates compete for binding of known amount of the enzyme-labeled aldosterone and aldosterone to be determined. The highly specific rabbit anti-aldosterone antibodies were obtained by injection of aldosterone-oxime thyroglobulin. The detection limit of aldosterone in both methods ranged between 2-20 pg. The proposed assays are suitable for the determination of aldosterone in biological fluids compared with other reported ELISA assays, as well as with RIA.
Aldosterone↗
Effects of dioptric blur on Snellen and grating acuity.
We compared the effects of dioptric blur on Snellen acuity and grating acuity. Dioptric blur had a strong negative effect on Snellen acuity, consistent with previous studies, but had little effect on grating acuity. Between 1 and 12 D both types of acuity were reduced as a linear function of blur. However, 12 D of blur reduced grating acuity to only 6/24 (20/80), whereas letter acuity was worse than 6/300 (20/1000). We suggest that these differences are due to the presence of "spurious resolution" in which phase-reversed gratings are readily detectable. But the phase reversals so distort the relative positions of linear segments within the letters that the letters become unrecognizable. These results indicate that Snellen letters are more sensitive than gratings to a patient's refractive errors, emphasize the differences between Snellen and grating acuity, and indicate that the minimum angle of resolution (MAR) concept is not applicable to letters.
Adult↗
Effects of trihexyphenidyl on plasma chlorpromazine in young schizophrenics.
This study investigated the effects of trihexyphenidyl on chlorpromazine (CPZ) plasma levels and clinical state in 20 relatively young schizophrenic patients diagnosed using the DSM-III. Spontaneous changes in CPZ plasma levels over time were also examined. Trihexyphenidyl significantly increased CPZ plasma levels (average 41%) but did not produce clinical change. The trihexphenidyl-induced increase in CPZ plasma levels was independent of CPZ oral dosage and of CPZ plasma levels. Chlorpromazine plasma levels decreased non significantly (about 13%) over the four weeks following steady state, but there was marked inter-subject variability, and CPZ levels rose in some subjects. Although identical CPZ doses produced widely variable plasma levels, CPZ plasma levels correlated significantly with oral dose. The views that antiparkinsonian drugs interfere with neuroleptic efficacy, and do so by lowering neuroleptic plasma levels, are questioned.
Adolescent↗
Voluntary motor performance in psychotic disorders: a replication study.
Voluntary motor performance was used to investigate the hypothesis of a continuum of psychosis from depression through schizophrenia. 43 schizophrenic, 36 schizoaffective, 50 major depressive, 20 manic, and 25 nonpsychotic patient controls were tested for tapping speed, finger dexterity, hand grip strength, and neuropsychological motor performance. Sex was included as an independent variable, and the effects of psychotropic drugs were evaluated. A continuum of motor dysfunction from depression through schizophrenia was not obtained. A measure of current psychotic symptoms was not associated with motor or neuropsychological performance. Motor performance was significantly worse in schizophrenic, schizoaffective, and psychotic affective disorders, when compared to nonpsychotic affective disorders. In this final analysis, psychoticism was defined by history. The results are discussed in terms of the hypothesis that psychoticism is a trait that is independent of diagnosis.
Humans↗
[Primary pulmonary lymphoma. Current data. Apropos of 9 cases].
The authors report 9 cases of primary pulmonary lymphoma (PPL). With this report, together with the publication of recent and important studies and with the latest advances in immunology, the principal features of this rare entity are emerging from among other lymphoproliferative pathologies of the lung. As a rule, PPL is a histologically well-differentiated tumour with low malignancy and slow course. Treatment is surgical in localized forms. In extensive forms there is no firmly established treatment, but the absence of clinical symptoms permits therapeutic abstention.
Adult↗
Reaction time impairment in schizophrenia and affective illness: the role of attention.
A young but chronic group of schizophrenic and affective disorders patients was tested for simple reaction time (RT) and RT while engaged in a concurrent task. The affective disorders patients were subdivided by the presence of psychotic features. The results show that extreme slowing of RT is due to psychoticism and is not characteristic of nonpsychotic affective illness. Extreme intrasubject variability, however, was specific to schizophrenia, and may be a trait marker of the disorder.
Adult↗
Identity integration and ego pathology in disturbed adolescents.
Utilizing the Rorschach and the Wechsler, groups of borderline adolescents (n = 26) and adolescents with other personality disorders (n = 26) were compared to determine whether there were differences in magnitude and type of disturbances in ego functioning. The specific aspects of ego functioning that were studied included disturbances in identity integration, reliance on primitive defensive operations, vulnerability to regressive thinking, and lapses in reality appreciation. Results indicated that during adolescence the borderline personality represents a more severe form of character pathology than other personality disorders, as revealed by more disturbances in identity integration, a greater regression to primary-process thinking in unstructured settings, and more frequent lapses in reality testing. This contrast was most striking in the area of identity integration, where identity disturbances tended to be associated with lapses in reality testing in borderline adolescents, while there was essentially no relationship between these two indicators of ego pathology in non-borderline adolescents. This supports the notion that disturbances in identity integration, or the sense of self, form an important part of the borderline diagnosis, even during adolescence.
Adolescent↗