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Biomedical subjects

J Ring

Publications and source records attributed to J Ring.

At least 487 records · Page 27Linked to original sources

[Therapy of atopic eczema].

When a decision is being made on the therapy of atopic eczema, the complex pathogenetic interactions involved in this disease have to be taken into consideration. The acute inflammatory changes respond to short-term glucocorticoid steroid treatment (topical); long-term steroid therapy should be avoided. In chronic lichen-type lesions, non-steroid topical applications can be helpful. Frequent acute infections of the skin require the application of antimicrobials. Intense pruritus is treated by antihistamines (possibly also H2-antagonists). Due to the well-known psychosomatic influence in this disease, careful counseling of the patient (and if a child, of the family) is necessary. Pathogenetically relevant allergic reactions of the immediate type can be treated successfully in some cases by hyposensitization. Prophylactic measures include allergen avoidance (climate therapy, no pets, well-established food allergens etc.). Possible new perspectives may be seen in the development of agents acting at the disturbed T-cell regulation, as well as by the introduction of mast-cell-blocking substances. The basis of every therapeutic approach in atopic eczema is, however, intensive skin care, using emollients and oil baths, especially during the remission phase.

Administration, Topical↗

[Diffuse melanosis with generalized and ocular metastasis in malignant melanoma].

In a 48-year-old female patient 9 months after excision of a nodular melanoma on the back, multiple cutaneous, subcutaneous and lymph node metastases developed. Thereafter diffuse melanosis developed together with ocular metastatic involvement during immunochemotherapy with BCG and dacarbazine (DTIC). Most of the cutaneous metastases disappeared spontaneously with halo formation, while new nodes formed. The patient survived with disseminated melanoma more than 2 1/2 years without cytostatic therapy, before she died from intestinal metastases.

Combined Modality Therapy↗

[Allergic vasculitis caused by vitamin B6].

A patient developed extensive bulloushaemorrhagic lesions on the lower legs after taking analgesic preparations. Allergologic tests yielded an Arthus-type reaction with vitamin B6. The histological and immunofluorescence examination of a lesional and test site biopsy showed the picture of a superficial and deep vasculitis with deposits of C3 at the basement membrane of dermal venules.

Aged↗

A selective inhibitor of thromboxane biosynthesis enhances immediate and inhibits late cutaneous allergic reactions in man.

Thromboxanes may be involved in late cutaneous reactions (LCRs). A new selective inhibitor of thromboxane biosynthesis was studied for its effect on immediate skin test reactions (WFRs) and LCRs in nine adult nonatopic volunteers (open study) and eight adult atopic patients (double-blind study vs. placebo). WFRs and LCRs were elicited by intradermal injections of 25 micrograms of compound 48/80 and 200 IU of rabbit anti-human IgE antibodies, and the patients' receiving injections of 0.32, 1.6, 8, 40, and 200 IU of anti-IgE antibodies. Dazoxiben (100 mg orally three times once every 4 hr) increased the diameter of wheals (p less than 0.005 in volunteers; p less than 0.05 in six patients receiving no additional drug treatment), favored their dispersion (lymphangitis/pseudopodia), and caused systemic reactions (headache, chills) in at least two out of eight patients. Edema formation during LCRs was markedly depressed in 13 out of 16 persons. Flare diameter and erythemata during LCRs were not altered. These data suggest a role of thromboxanes and their natural antagonists (e.g., prostacyclin) in the regulation of allergic inflammatory processes.

Adult↗

Decreased release of lysosomal enzymes from peripheral leukocytes of patients with atopic dermatitis.

Peripheral blood leukocytes from fifteen patients with atopic dermatitis and ten normal nonatopic volunteers were incubated with various stimuli in vitro, and the release of the lysosomal beta-glucuronidase into the supernatant was measured. beta-Glucuronidase release was significantly reduced in patients with severe atopic dermatitis after stimulation with aggregated IgG, horse antihuman lymphocyte globulin (ALG), zymosan, and yeast-activated serum. There was an indirect correlation (r = -0.83) between aggregated IgG-induced beta-glucuronidase release and the intensity of clinical symptoms; however, there was no correlation with serum IgE levels. The enzyme release measured was not caused by cellular lysis, except for high concentrations of antilymphocyte globulin, as determined by lactic dehydrogenase (LDH) activity in the supernatant. It is concluded that lysosomal enzyme release defects might be involved in the well-known decreased resistance to infections in patients with atopic dermatitis.

Adolescent↗

Plasma histamine concentrations in atopic eczema.

Plasma histamine concentrations were determined using a radio-enzymatic assay in fifty-four patients suffering from atopic eczema and in thirty-nine controls (contact dermatitis, psoriasis and normal non-atopic healthy volunteers). While in none of the controls histamine levels in plasma exceeded 1 ng/ml, seventeen out of fifty-four patients with atopic eczema showed increased plasma histamine concentrations ranging between 1.2 and 5.2 ng/ml. Elevated plasma histamine levels were found mostly in patients with severe eczema and high serum IgE levels. Longitudinal studies in seven patients revealed normal plasma histamine values during clinical remission.

Adolescent↗

[Contact sensitization to an antiperspirant with the active ingredient propantheline bromide].

In five patients developing axillary contact dermatitis subsequent to the use of an antiperspirant containing propantheline bromide patch testing was performed. Three patients reacted to propantheline bromide. The other two patients exhibited positive patch test reactions to the proprietary product; in these cases, the active ingredient was not tested individually. In all five patients, in addition to the antiperspirant, at least one other contact allergen was identified. In case of localized adverse reactions due to topical treatment of hyperhidrosis axillaris patch testing is recommended. If contact allergy to propantheline bromide is revealed, one should be aware of cross sensitization to methantheline bromide.

Adult↗

[Anaphylaxis following ingestion of coffee, chronic urticaria and analgesics idiosyncrasy].

In a 45-year-old woman with chronic urticaria anaphylactoid reactions occurred after (1) ingestion of coffee and (2) taking an analgesic drug. Prick testing in the patient and passive cutaneous anaphylaxis with coffee extract in the monkey Macacus nemestrinus were positive. With regard to further prick tests and oral provocation tests there is conclusive evidence that anaphylactic hypersensitivity to coffee was co-existing with idiosyncrasy to acetylsalicylic acid, indomethacne, metamizole (dipyrone), and caffeine.

Analgesics↗

[The problem of dextran intolerance and its specific prevention with hapten inhibition. A part of the history of applied immunology].

Dextrans are used in clinical medicine since more than 35 years. One of the main problems of dextran application are severe incompatibility reactions of the anaphylactoid type. Lethal cases have been reported. In the early fifties antibodies against high molecular weight dextrans have been described in patients with incompatibility reactions as well as in normals. By the introduction of new dextrans (produced by B. Leuconostoc mesenteroides B 512) with lower molecular weight and less branching newer solutions were developed without immunogenicity. When, in the early seventies, cases of severe incompatibility reactions to those dextrans were reported, nonimmunological mechanisms were discussed as e.g. direct mediator release--as in the model of rat dextran hypersensitivity--or direct complement activation via the alternative pathway.

Allergy and Immunology↗