[Comment on the short report by H. Krause and E.-I. Grussendorf: Syntopy of Bowen disease and mustard gas scar].
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Aged↗
Biomedical subjects
H Krause
Publications and source records attributed to H Krause.
Ca(2+)-induced reversible translocation of phospholipase A2 between the cytosol and the membrane fraction of rat liver macrophages.
In cell-free extracts of rat liver macrophages (Kupffer cells) phospholipase A2 was found to be rapidly associated with the particulate fraction in a Ca(2+)-dependent manner at Ca2+ concentrations of 0.1-1.0 microM. This is also the range of the levels of intracellular Ca2+ reported for basal and various stimulated conditions. After translocation, phospholipase A2 could be released from the membranes in the presence of Ca2+ chelators, increasing the specific activity of phospholipase A2 in the supernatant fraction. These findings support the view that translocation is a regulatory mechanism of phospholipase A2 by bringing the enzyme to its substrate. Unlike the situation with protein kinase C, Mg2+ exerted little effect on phospholipase A2 translocation, indicating that this process is regulated in vivo mainly by fluctuations of the intracellular Ca2+ content.
Animals↗
Synergistic effect of magnesium and calcium ions in the activation of phospholipase A2 of liver macrophages.
In cell-free extracts of rat liver macrophages (Kupffer cells) phospholipase A2 was found to be strongly activated at free Ca2+ concentrations from 100 nM to 1 microM in the presence of 4 mM free Mg2+. This is within the range of intracellular free Ca2+ reported for basal and various stimulated conditions, respectively. Ca2+ alone increased phospholipase A2 activity at high Ca2+ concentrations (1 mM) whereas Mg2+ alone had only little stimulatory effect. Calmodulin does not seem to participate in the regulation of phospholipase A2 although it relieved the inhibition of phospholipase A2 activity by calmodulin antagonists.
Animals↗
Molecular organization, ontogeny and expression of murine alpha beta and gamma delta T cell receptors.
T lymphocytes recognize antigens via transmembrane heterodimers, their T cell receptors (TCR). T cells express either TCR alpha beta or TCR gamma delta isotypes. Several molecular mechanisms are employed to diversify the TCR repertoire. Ontogeny, transcriptional regulation, and control of TCR expression will be discussed.
Animals↗
[Radiologic picture production and communication in the hospital. Quantitative framework and analysis].
To obtain an overall impression of the quantitative distribution and the communication structure of the conventional situation still in force in the area of radiological picture production and communication in the hospital, a comprehensive study was carried out against the background of the planned implementation of a picture archiving and communication system (PACS). In the present paper the total production rate of X-ray pictures, the equivalent amount of digital storage capacity, the topology of picture communication lines and their picture transfer rates and the temporal distribution on demand of archived prediagnosis X-ray pictures are detailed.
Germany↗
[Early and late complications of toxic and allergic origin following sclerotherapy in hemorrhoids].
The various disorders occurring after sclerotherapy for hemorrhoids comprise excessive local reactions, necrosis followed by hemorrhage and allergic reactions. Symptoms, prevention and therapy of these adverse effects are detailed.
Drug Hypersensitivity↗
[Presence of methadone in apocrine sweat of the human].
The presence of methadone was investigated in 24-h perspiration samples obtained from patients receiving daily maintenance doses of the drug. The samples were collected from the axillary region. The concentrations measured by radioimmunoassay ranged from 8.3 ng/cm2 per 24 h up to 25.3 ng/cm2 per 24 h. The concentrations determined by RIA are the sum of methadone and its metabolites. The presence of the drug in the perspiration samples were also revealed by GC/MS.
Adult↗
Intrahospital transport of critically ill patients.
Severe complications sometimes occur in critically ill patients during intrahospital transport. Possible causes may be inadequate ventilation, insufficient monitoring, interrupted application of vasoactive drugs, or disconnections and accidental extubation. We constructed a transport unit equipped with a respirator; capnometer; monitor to measure ECG, arterial and intracranial pressures, and temperature; and two syringe pumps that can be connected easily to the patient's bed. Gas is supplied by cylinders with oxygen and air. Electrical power is supplied by two accumulators connected to recharger and transformer devices that deliver 220 V (110 V). Since this transfer unit was introduced, we have had no unanticipated problems during intrahospital ICU patient transport.
Critical Care↗
Arachidonate metabolism in macrophages is affected by albumin.
The incorporation of externally added arachidonic acid into membrane lipids of cultured liver macrophages was found to be strongly inhibited by albumin. Furthermore this protein increased the appearance of radiolabelled arachidonic acid in cell media from [3H] arachidonic acid-prelabelled cells but inhibited almost totally the stimulus-induced formation of prostanoids. Analysis of the membrane lipids revealed that in the presence of albumin arachidonic acid was released to almost the same percentage from all phospholipids, independently of the stimulus. In contrast, in the absence of albumin a significant loss of arachidonic acid was observed for phosphatidylcholine and phosphatidyl-inositol only and the degree of the decrease in label was dependent on the stimulus. Although the exact mechanisms for these actions of albumin are not yet known this protein clearly exerts an inhibitory effect on arachidonic acid incorporation into membrane lipids as well as on the synthesis of different eicosanoids in macrophages; on the other hand albumin leads to an enhanced appearance of arachidonic acid in the cell media. Therefore this protein may be able to control the level of free arachidonic acid within and outside the cell and thereby the conversion of arachidonic acid into eicosanoids.
Albumins↗
Use of molecular cloned viral genomes for studies into interrelationship between type D retroviruses from monkey and human cells.
Type D retroviruses constitute a group of RNA tumor viruses so far isolated exclusively from primates. 4 groups of isolates are known to date (Mason-Pfizer virus, agents of simian acquired immunodeficiency syndrome--SAIDS, endogenous viruses of Old World and New World monkeys, and some isolates from cell lines--PMF virus). The members of the latter group are well characterized at protein-chemical and immunological levels. Briefly described in this paper are the results of our studies into the molecular structure of the viral genome of PMFV in relation to other members of the group (SAIDS-retrovirus/NE, MPMV, and SRV-1).
Animals↗
Molecular cloning of a type D retrovirus from human cells (PMFV) and its homology to simian acquired immunodeficiency type D retroviruses.
Unintegrated circular proviral DNA of a type D retrovirus (PMFV) isolated from a permanent human cell line was molecularly cloned in the bacteriophage vector L47.1 and subcloned in the plasmid vector pGEM-2. A restriction endonuclease map of PMFV DNA was established using 10 different enzymes for single and multiple digestions of closed circular and cloned DNA molecules. By restriction endonuclease analysis cloned PMFV DNA represented full-length viral DNA with one long terminal repeat (LTR). The comparison of the physical map of cloned PMFV to those of other cloned type D retroviruses revealed closest homology to the map of retrovirus D/New England (pD398) and SAIDS retrovirus type 1 (SRV-1). The relatedness of PMFV to further type D retroviruses (Mason-Pfizer monkey virus, MPMV; SAIDS retrovirus type 2, SRV-2) was also demonstrated by cross-hybridization of cloned DNAs under different stringencies (i) using full-length genomic probes of PMFV, MPMV, and SRV-2 and (ii) by DNA sequence analysis of regions of the group specific antigen (gag) protease (prt), polymerase (pol), and envelope (env) genes.
Blotting, Southern↗
Measurement of lysozyme in human body fluids: comparison of various enzyme immunoassay techniques and their diagnostic application.
Three variants of the immunoenzymometric assay of human lysozyme with HRP-labeled antibodies were compared. The highest sensitivity (with a detection limit of 0.2 micrograms lysozyme/L) was achieved by a one-step assay lasting 2 h. Between-batch precision for the techniques was 6-11%. Lysozyme reference values were determined in serum, cerebrospinal fluid and urine. In serum they are age-dependent and in urine sex-dependent when related to creatinine excretion. Serum lysozyme is increased in only 57% of the patients with active rheumatoid arthritis and is also unreliable for indicating remission. In Crohn's disease the serum lysozyme reflects activity better, but it does not exceed the diagnostic value of alpha-1-acidic glycoprotein (orosomucoid). The lysozyme quantification in cerebrospinal fluid is useful in distinguishing between viral or bacterial meningitis.
Acute Disease↗
Evaluation of type D retroviruses as diagnostic tools in HIV infections.
A type D retrovirus isolated from a permanent human cell line (PMFV) was employed as diagnostic reagent both in Southern transfer hybridization experiments using the cloned genome as a probe and in immunoblot analysis using SDS disrupted virus particles. Hybridization experiments performed under conditions of different stringencies revealed a close homology of PMFV to SAIDS type D retroviruses of serotype 1 (SRV-1, SAIDS retrovirus D/NE), a related homology to the prototype type D virus (MPMV) and to viruses of serotype 2 (SRV-2), but no homology to the endogenous type D retrovirus of squirrel monkeys (SMRV) and the human AIDS virus (HIV-1). Antigens of PMFV showed cross-reactivity only to antibodies of a SAIDS infected macaque, but no reaction to anti HIV-antibodies of seropositive patients. Thus, the type D virus isolated from a human cell line and closely related to SAIDS type D viruses of macaques is not related to the AIDS virus in humans.
Acquired Immunodeficiency Syndrome↗
[Syphilis in HIV infection. 2 cases of neurosyphilis].
In HIV-infected people the course of syphilis is altered and aggressive. Besides seronegativity Neurosyphilis can manifest premature and as a outcome of failed penicillin-therapy in secondary syphilis. Two cases of neurosyphilis are reported and discussed. The usefulness of spinal fluid analysis is pointed out. Recommendations for diagnostics and therapy are given.
AIDS Serodiagnosis↗
[Comparative observations of internal and external quality controls in the districts of Neubrandenburg and Rostock].
A useful combination of results from internal quality control and external quality assessment is possible only if the statistical procedures of both systems involve the same limits to accept control data. These limits are shown. For 45 laboratories expected quality groups QG-T are calculated from results of internal quality control. Quality groups QG-RVL are calculated from results of external quality control assessment. In 30 cases the great difference of QG-T and QG-RVL is supposed to be caused by inaccurate performance of internal quality control.
Germany, East↗
[A computer-controlled study design for measuring H-reflexes in the human].
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Computer Systems↗
[Diagnostic value of cerebrospinal fluid in childhood hydrocephalus and hydroma].
A statistical analysis of 212 patients with infantile pressure hydrocephalus and 61 with infantile subdural hydromas shows that there are no significant differences in the investigated liquor parameters (cell count, differential sediment, total protein, electrophoresis) that permit differentiation between the two. The significant increase found in the beta-tau fraction by liquor electrophoresis in the hydrocephalus patients is unsuitable for use as a differential diagnostic criterion on account of its poor discrimination. The results of liquor examinations following drainage operations are dealt with separately, and a liquor syndrome found as a rule in liquor taken from a Rickham reservoir is described.
Cerebrospinal Fluid↗
[Determination of proteins in the cerebrospinal fluid by means of immunologic methods].
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Cerebrospinal Fluid Proteins↗