Marital interaction and depression.

[Correction Notice: An erratum for this article was reported in Vol 99(4) of Journal of Abnormal Psychology (see record 2008-10491-001). In this article, the measures in Table 1 were incorrectly listed. The third and fourth measures ought to read "Wife DAS" and "Husband DAS," respectively.] In this article, patterns of marital interaction as a function of depression and marital satisfaction are examined. The purpose of the study was to separate dysfunctional marital interaction patterns that were unique to depression from those that were associated with marital distress. The presence or absence of a depressed wife was crossed with level of marital satisfaction (distressed or nondistressed) to produce four groups of subject couples. Couples in which the wife was depressed exhibited more depressive behavior than did nondepressed couples, but only during discussion of a high conflict (as opposed to neutral) topic. Sex&×&Depression Level&×&Marital Satisfaction interactions were found for aggressive behavior: Depressed women in nondistressed relationships exhibited behavior that was characteristic of maritally distressed couples (high rates of aggression). In contrast, the husbands of these women exhibited behavior that one would expect in happily married couples (low rates of aggression). We failed to replicate previous findings that depressive behavior served a coercive function, although distressed couples, regardless of depression status, exhibited all the usual signs of negative dysfunctional interaction. [An erratum for this article will appear in Journal of Abnormal Psychology, 1990 (Nov), Vol 99(4). The measures in Table 1 were incorrectly listed in the original article.] (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The adrenomedullary venous vasculature as a target for endothelins: comparison of the porcine and bovine central adrenomedullary veins

BACKGROUND/AIMS: Liver fibrosis is mainly evaluated by qualitative histological examination. Although histological semi-quantitative scores and quantitative determination with image analysis are now possible, these methods have not been fully validated and compared. Therefore, we evaluated these two methods prospectively in 243 patients with chronic liver disease. METHODS: The semi-quantitative fibrosis score was evaluated by two independent pathologists, using the Knodell fibrosis score and a 6-grade score derived from the Metavir score; the area of fibrosis was measured by image analysis. The serum levels of hyaluronate, N-terminal peptide of procollagen III, laminin, transforming growth factor-beta1, alpha2-macroglobulin, apolipoprotein A1, PGA score and prothrombin index were measured. RESULTS: There was a good correlation between the semi-quantitative fibrosis score and the area of fibrosis (r=0.84, p<10(-4)). Using multiple regression analysis, the semi-quantitative score was predicted by the 8 serum markers with R2=0.69 (R2=0.59 for hyaluronate at the 1st step) while the area of fibrosis was predicted with R2=0.79 (R2=0.76 for hyaluronate at the 1st step), and the Knodell fibrosis score was predicted with R2=0.65 (R2=0.31 for hyaluronate at the 1st step). CONCLUSIONS: The area of fibrosis, as determined by image analysis, and the semi-quantitative score are well correlated. However, for serum markers the correlation is higher with the area of fibrosis than with the semi-quantitative score. Other characteristics such as reproducibility, rapidity, simplicity, adaptability, and exhaustiveness also favor image analysis.     

An overview of pharmacoepidemiology

Pharmacoepidemiology is the application of epidemiological principles and methods to the study of drug effects in human populations. The goal of this discipline is to characterize, control and predict the effects and uses of pharmacological treatment modalities. Pharmacoepidemiology is also concerned with the economic impact and health benefits of unintended drug effects. The increasing importance of pharmacoepidemiology has been created by the need to develop a more accurate portrait of how drugs are used in the general population. Sophisticated and potent drug therapies require surveillance beyond the scope of the carefully controlled clinical trials of Phases I, II and III. Case-control and cohort studies, which allow scientists to evaluate the effects of patient variables on clinical outcomes, provide a wealth of information regarding the study of unexpected drug effects, drug utilization, treatment costs and the individualization of therapy.     

Investigation of membrane disruption in the reaction catalyzed by cholesterol oxidase

Dye leakage experiments were undertaken to investigate the membrane disruption properties of cholesterol oxidase. Inspection of the X-ray crystal structures of cholesterol oxidase suggested that an active-site "lid" opens in order to bind substrate [Li, J., Vrielink, A., Brick, P., & Blow, D. M. (1993) Biochemistry 32, 11507-11515]. We tested whether the interaction of the putative active-site lid with the membrane was sufficiently disruptive of the membrane structure to cause leakage or lysis of the cell membrane. Vesicles (100 nm) composed of egg phosphatidylcholine, 2-palmitoyl-3-oleoyl-1-sn-phosphatidylethanolamine, and 2-palmitoyl-3-oleoyl-1-sn-phosphatidylcholine were used in this study to mimic biomembranes. To separate the effects of membrane binding from conversion of cholesterol to cholest-4-en-3-one, the active-site mutant E361Q was utilized. In the reaction catalyzed by E361Q, isomerization of the cholest-5-en-3-one intermediate is suppressed and cholest-5-en-3-one is the major product isolated. Furthermore, E361Q produces cholest-5-en-3-one 20-fold more slowly than wild type produces cholest-4-en-3-one from cholesterol. Wild-type and E361Q cholesterol oxidases bind to vesicles with an apparent K(D) of approximately 25 microM, as measured by quenching of intrinsic tryptophan fluorescence, irrespective of headgroup size and cholesterol content. Membrane disruption was measured by leakage of the encapsulated marker carboxyfluorescein. Leakage was observed with cholesterol-containing vesicles and wild-type enzyme only; the rate of leakage was dependent on the rate of cholest-4-en-3-one production. E361Q did not induce membrane disruption, regardless of vesicle type tested. Thus, binding of cholesterol oxidase to the membrane and partitioning of cholesterol into the active site does not sufficiently perturb the bilayer to cause leakage of vesicle contents. Formation of the product cholest-4-en-3-one, however, does increase membrane permeability. Expansion of the lipid bilayer upon conversion of cholesterol to cholest-4-en-3-one is the likely cause of this increased permeability.     

A sharper look at gloss

Summary & Conclusions  The goniphotometer/glossmeter based on the LDA detector has been developed into a portable and robust instrument with exceptionally high resolution of the light distribution near the specular angle. The LDA detector combined with the read-out circuitry and associated software made it possible to select the appropriate sets of photodiode sensors to calculate indices of peak specular reflectance; gloss; haze and distinctness of image. The data, including full reflected light distribution curves, can be stored and subsequently downloaded to a computer for display or analysis.