How to diagnose mould allergy? Comparison of skin prick tests with specific IgE results.

BACKGROUND: Diagnosis of mould allergy is complicated due to the heterogeneity of the test material and the decrease in the number of commercial mould skin test solutions that are currently available. OBJECTIVES: The aim of this study was to compare skin prick tests (SPT) from different manufacturers to one another and concurrently with sIgE tests for Aspergillus fumigatus (Asp f), Cladosporium herbarum (Cla h), Penicillium chrysogenum (Pen ch), Alternaria alternata (Alt a) and Aspergillus versicolor (Asp v) to ascertain a feasible diagnostic procedure for mould sensitization. METHODS: In this multi-centre study, 168 patients with mould exposure and/or mould-induced respiratory symptoms were included. Mould SPT solutions were analysed biochemically and tested in duplicate on patients' arms. Specific IgE (sIgE) concentrations to corresponding mould species and mould mix (mx1) were measured by ImmunoCAP. SPTs in accordance with one another and with sIgE were further considered. The test efficiency was calculated using receiver-operating characteristic (ROC) analysis. RESULTS: Mould sensitization was more frequently detected by the SPT (90 of 168) than by the sIgE tests (56 of 168). Concordances of double SPT positives were only sufficient (≥ 80%) for environmental allergens, two Asp f and three Alt a SPT solutions, whereas all other mould solutions revealed concordances < 80%. The antigen content of SPT solutions was positively associated with concordant SPT double values as well as with sIgE. Taking sIgE as the 'positive standard', all mould SPT solutions revealed test efficiencies > 80%, but varied up to 20% in sensitivity and positive predictive value with the exception of Alt a. CONCLUSIONS: SPT solutions are sensitive and essential diagnostic tools for the detection of mould sensitization. Our recommendation for diagnosis would be to test at least Alt a, Asp f and Pen ch using SPT and additional sIgE test to mx1.

[Double sensitization to PR10 and PR-14 proteins]. / Doppelsensibilisierung auf PR-10- und PR-14-Proteine.

A patient with mild oral allergy syndrome presented with a history of anaphylaxis induced by both hazelnuts and peaches. The ensuing work-up showed a double sensitization to proteins in both pathogenesis-related group 10 (e.g. Bet v1, Cor a1, Pru p1) and 14 (e.g. Pru p3, Cor a8). Such double sensitization profiles are increasingly being recognized in Europe.

[Anaphylaxis to PR-10 proteins (Bet v1 homologues)]. / Anaphylaxie auf PR-10-Proteine (Bet v1-Homologe).

Secondary food allergies to PR-10 proteins (Bet v1 homologues) are the most common food allergies in Germany. Clinically they present with an oral allergy syndrome (intraoral pruritus and perhaps swelling). When drinks containing PR-10 proteins are rapidly consumed, for example after sporting activities, large concentrations of allergen can be reached without any intraoral symptoms and then lead to anaphylaxis. This phenomenon has often been described for soja milk and occurred in our case with an apple drink with 60% fruit concentration. It seems likely that such cases of anaphylaxis are not adequately represented in the anaphylaxis registry.

Human endothelial cell septins: SEPT11 is an interaction partner of SEPT5.

The septin SEPT11 is a novel member of the highly conserved septin family. Septins are cytoskeletal GTPases, which form heteropolymeric complexes. They are involved in cytokinesis and other cellular processes, such as vesicle trafficking and exocytosis. SEPT11 has strong homology to SEPT8. Previously, we identified the interaction of SEPT5 and SEPT8. Using the yeast two-hybrid system, we now demonstrate that SEPT11 partners with SEPT5. The molecular interaction of SEPT11 with SEPT5 was verified by coprecipitation of SEPT5 and SEPT11 from lysates of the human T-cell leukaemia cell line JURKAT and by fluorescence resonance energy transfer. The interaction between SEPT5 and SEPT11 requires the GTP-binding domain and the C-terminal extension. Western analysis in various mouse and human tissues revealed that expression of SEPT11 is restricted to the same tissues as those expressing SEPT5, suggesting that SEPT11 and SEPT5 are components of a cell-specific septin complex. SEPT5, which is expressed in human umbilical vein endothelial cells (HUVECs), has been reported to play an important role in exocytosis. We now report that HUVECs also express SEPT11. Given the interactivity between SEPT5 and SEPT11 as shown above and their coexpression in HUVECs, it may be that a complex formed by these two proteins is involved in the exocytosis mechanism in HUVECs.

Analysis of double-stranded RNA and virus-like particles in trichothecene-producing strains ofFusarium graminearum.

Double-stranded RNAs (dsRNAs) have been found in two isolates of the plant pathogenic fungus Fusarium graminearum which produce trichothecene mycotoxins. The isolates 8.2 and 19.2 had dsRNAs in the size of about 2.0 kb and 6.0 kb, respectively, which were associated with capsid proteins and persisted within the cytoplasm of the infected host cells as encapsidated virus-like particles (VLPs). The dsRNAs contained in the VLP pellets were the same size as the dsRNA isolated in total nucleic acid preparations. In the VLP pellets the isolate 19.2 had a second dsRNA with the size of about 1.6 kb. After mycovirus purification one icosahedral particle of about 28 nm in diameter from the isolate 8.2 and two icosahedral particles of about 28 nm and 38 to 40 nm in diameter from the isolate 19.2 could be identified with electron microscopy. SDS-PAGE analysis of the VLPs from the isolate 8.2 revealed one major protein component of approximately 65 kDa, while the isolate 19.2 had two major protein bands at about 94 kDa and 105 kDa. Both isolates were studied for potential trichothecene production. Tox5 PCR showed a 658 bp fragment in each isolate. In addition, both strains were able to produce the trichothecenes deoxynivalenol (DON), the derivatives acetyl-DON (3-A-DON, 15-A-DON) and nivalenol (NIV) in vitro.

[Intensified after-care--a method for improving occupational reintegration after myocardial infarct and/or bypass operation]. / Intensivierte Nachsorge (INA)--ein Verfahren zur Verbesserung der beruflichen Reintegration nach Herzinfarkt und/oder Bypassoperation.

Occupational reintegration after coronary heart disease of patients who are insured by the German workers pension (Arbeiterrentenversicherung) succeeds in 40-60% of the recorded cases. Patients who were not able to return to work after finishing their regular cardiac rehabilitation took part in a program called "Intensivierte Nachsorge (INA)". INA is an interdisciplinary support program, taking place twice a week for a whole day over a period of six weeks. On the remaining three days patients were either progressively reintegrated into their working place or stayed at home. The results of the INA group were compared to those of a control group. Two years after patients had terminated the cardiac rehabilitation, statistically significant effects could still be found: 70.2% of the INA group had returned to work compared to 52.6% of the control group. This is a difference of 17.6%. After the results had been corrected by considering age differences between the two groups, the control group had a recalculated return to work rate of 57.4%. A significant difference of 12.8% could still be identified with respect to the INA group. Support programs which follow regular cardiac rehabilitation seem to be specially suitable for older patients with highly perceived job strain, because our results showed that these patients had lower return to work rates. 44.2% of the INA group and 21.9% of the control group were progressively reintegrated into their work place. Two years after their regular rehabilitation 36.3% of the INA group patients took part in ambulatory heart groups compared with 10.4% of the control group. It was also found that patients of the INA group showed improvements in activities of daily life. The INA program however does not seem to have an influence on behavioral components such as eating habits, relaxation, and smoking as well as on the psychological status. The physical fitness measured in watt x min at the beginning of the INA program (T1) was 589.46 +/- 255.03 in the control group. This number increased to 598.32 +/- 276.01 six months after regular rehabilitation (T3) and continued to rise to 661.15 +/- 362.01 after two years (T4). In the INA group the numbers were as follows: 658.13 +/- 263.63 at T1, 751.83 +/- 318.15 at T3, and 717.93 +/- 336.76 at T4. The differences between the groups are significant at T1 and T3, whereas at T4 there is no significant difference. It should also be stated that the lipid parameters indicated no differences between the groups except for the triglyceride values which were significantly lower statistically in the INA group than in the control group.

[Evaluation of the effectiveness of an ambulatory after-care rehabilitation program]. / Effektevaluation eines ambulanten nachstationären Rehabilitationsprogramms.

Effects of an outpatient cardiological rehabilitation programme that is offered to patients following their inpatient treatment in a rehab clinic are measured and compared with the data collected from an untreated group. The study group consists of 155 cardiological patients (after heart attack, bypass operation and heart-valve prosthesis) in the treatment group as well as 136 in the non-treatment group. The outpatient programme takes place twice a week in a cardiological rehab clinic, with patients participating for a maximum period of twelve weeks. Data are collected at the beginning, the end and three months after the end of the programme from the treatment group resp. twice with a six months interval from the non-treatment group. The used outcome measures are a number of medical variables (e.g. stress ECG, BMI, blood pressure), variables concerning vocational reintegration, plus a questionnaire. This questionnaire consists of a Functional Limitation Scale, a Mood Check List, a "Health Locus of Control"-Scale as well as a number of items regarding health-related behaviour and heart complaint symptoms. The project duration was 36 months, starting in June 1993. The funding source is the "Landesversicherungsanstalt Westfalen", a regional division of the German Statutory Old Age Insurance. As data concerning vocational reintegration indicate, the programme can be a meaningful complement to a larger amount of reintegrated patients (66.9%) compared to the non-treatment group (50.2%). To estimate the long-term effects of the programme, a 24-month-follow-up was started in January 1996.

[Flexibility of cardiologic rehabilitation exemplified by the Königsfeld (Ennepetal) model]. / Flexibilisierung in der kardiologischen Rehabilitation am Beispiel des Königsfelder (Ennepetaler) Modells.

Cardiac rehabilitation makes it possible to reduce costs. Many of these possibilities and opportunities for optimization of costs reduction essentially result from the positive effects of an individually networked flexible rehabilitation treatment. A prerequisite is readiness of all those participating in the treatment process to cooperate. The Königsfeld (Ennepetal) model enables individual and differential shortening of cardiac rehabilitation, and in some of the patients a partial or complete outpatient/partially inpatient cardiac rehabilitation. In conjunction with more intensive postrehabilitation care for patients unable to work, this can lead to a major improvement in rehabilitation treatment using available resources without loss of quality and in particular without risk for patients. Consistently intensified postrehabilitation care entails the greatest possibilities of lowering costs, since saving of sickness benefit, reduction of sick pay, recommencement of work and above all prevention of early retirement are of particular economic advantage.

Risk factors for latex hypersensitivity in childhood.

As hypersensitivity to natural rubber latex (NRL) has become an increasingly recognized problem in children, identification of all groups at risk seems important. In this study hypersensitivity to NRL was evaluated in 337 children with potential risk factors. We identified by questionnaire children's underlying diseases, history of surgical procedures, evidence of atopy and patient's history of NRL-specific reactions. Hypersensitivity to NRL and other allergens relevant in the Düsseldorf area was evaluated by skin prick test and specific IgE. In 9.2% of all children hypersensitivity to NRL was observed. Significant risk factors for hypersensitivity to NRL were, among the underlying diseases, spina bifida (odds ratio 29.2), hydrocephalus internus (10.1), gastrointestinal malformation (5.2) and atopy (2.2). Surgical procedures with significant risk were the implantation of a ventriculo-peritoneal shunt (15.7) and surgery of the gastrointestinal tract (3.1). Frequency of surgical procedures correlated (p < 0.001) with risk of hypersensitivity. Frequent surgery and atopy were found to have an additional effect on the risk of hypersensitivity. Information about previous NRL-specific reactions obtained by questionnaire was of little predictive value when performing multivariate analysis. For children at high risk for hypersensitivity to NRL preoperative evaluation and, in case of hypersensitivity, preventive measures seem to be advised.

Elevated levels of interleukins IL-1 beta, IL-6 and IL-8 in naturally acquired viral rhinitis.

We studied the cytokines IL(interleukin)-1 beta, IL-4, IL-6 and IL-8 in nasal lavage samples from 20 patients with naturally acquired viral rhinitis and 5 healthy controls without nasal complaints. IL-1 beta, IL-6 and IL-8 levels in lavage fluid from the viral rhinitis patients were significantly elevated when compared to control subjects. IL-4 was not measurable in any of the samples. The cytokine levels in secretions from the healthy controls remained stable intraindividually on 5 consecutive sampling days. We suggest that cytokines such as IL-1 beta, IL-6 and IL-8, but not IL-4, are involved in the pathophysiology of the common cold.

Allergic contact reaction to dexpanthenol: lymphocyte transformation test and evidence for microsomal-dependent metabolism of the allergen.

In a patient with contact dermatitis, dexpanthenol was found to be the causative allergen. There was a positive reaction to dexpanthenol on patch testing. Controls did not show any positive reactions to dexpanthenol on patch testing. Additionally, an LTT was performed. After preincubation with dexpanthenol-modified microsomes, we observed an increase in lymphocyte proliferation to dexpanthenol, in comparison to dexpanthenol without microsomes, suggesting that microsomal metabolism plays a rôle in the pathogenesis of dexpanthenol sensitization, because microsomes are known to possess drug metabolizing enzymes such as cytochrome P450.