Search PubMed⌕ Search

Biomedical subjects

H A Neumann

Publications and source records attributed to H A Neumann.

At least 127 records · Page 7Linked to original sources
PubMed1982

Effect of interferon on pluripotent hemopoietic progenitors (CFU-GEMM) derived from human bone marrow.

A culture assay for multilineage hemopoietic progenitors (CFU-GEMM) that form mixed hematopoietic colonies containing granulocytes, erythroblasts, megakaryocytes and macrophages was described. The effect of human leukocyte interferon on multilineage hemopoietic progenitors was examined. Leukocyte interferon does reduce the plating efficiency of noncommitted precursors (CFU-GEMM) in a dose related fashion. A reduction of the plating efficiency of mixed hemopoietic colonies was observed even when interferon was added 72 hours after initiation of the cultures.

Bone Marrow Cells↗
PubMed1982

[Immunoglobulin deposits in vascular walls in cutaneous lupus erythematosus. Immunofluorescence study].

This paper reports an immunofluorescence (IF) study of the skin of 16 patients with chronic discoid localised lupus erythematosus and 5 patients with cutaneous disseminated lupus erythematosus. In the majority of the cases (18), we have found immunoglobulin and complement deposits not only along the dermoepidermal junction, but also in the blood vessel walls. In these deposits there was a predominance of IgM. It appears that an immune complex vasculitis in the skin can be found in patients from the entire lupus erythematosus spectrum. The discovery of immunoglobulins and complement deposits in the blood vessel walls of the involved skin of patients with discoid lupus erythematosus, suggests that it can be considered as an important (and even characteristic) feature of the disease.

Adult↗
PubMed1982

Cytotoxic T-cell clones derived from pluripotent stem cells (CFU-GEMM) of patients with Hodgkin's lymphoma.

Pluripotent stem cells (CFU-GEMM) give rise to multilineage hemopoietic colonies in culture. The cellular composition revealed that mixed colonies contain cells of different myeloid lineages and mononuclear cells with T-cell surface antigens. T lymphocytes of primary colonies and replated secondary clones from 5 patients with Hodgkin's lymphoma (stage I--II) were identified by their reaction with the monoclonal antibody OKT-8. Replated secondary clones do act functionally as cytotoxic cells using K562 as target cells. Evidence for a common progenitor of myeloid and lymphoid cells is provided by analysis of individual secondary colonies with the use of OKT-3, OKT-4, OKT-8, VIM-D5, and IgM + D antibodies for each individual clone. Primary mixed and replated secondary colonies revealed OKT-8-positive cells. No reaction with OKT-3, OKT-4, VIM-D 5, or IgM + D was observed. In mixed colonies grown from putative bone marrow transplant donors, only OKT-3-positive cells could be observed. Secondary replated colonies did not stain for OKT-8 and failed to lyse 51Cr-labeled K562 cells.

Antibodies, Monoclonal↗
PubMed1981

The presence of beta2 microglobulin on the membrane of the keratinocyte in premalignant skin disorders.

Beta2 Microglobulin, the invariable light chain of the histocompatibility antigen, has proved to be absent on the cell surface of basal cell carcinoma. In actinically damaged skin and in patients with a past history of arsenic ingestion changes can be observed on the epidermal cell membrane which can predict malignancy before cell dysregulation is visible. The epidermis in the basal cell naevus syndrome behaves in this respect as normal epidermis and the spontaneous tumour growth cannot be explained by a predisposing defect in the HLA-antigens of the epidermal cell surface.

Arsenic↗
PubMed1981

Hepatitis B surface antigen deposition in the blood vessel walls of urticarial lesions in acute hepatitis B.

Urticaria is known to occur in the pre-icteric phase of acute viral hepatitis. Often such urticaria is a symptom of a serum sickness-like syndrome which can be a prodrome of viral hepatis. Immune complexes are thought to be pathogenetic in this condition. In this paper we present two patients with a serum sickness-like syndrome, urticaria and hepatitis B. By immunofluorescence techniques Hepatitis B surface antigen, CIq and C3 could be demonstrated in the blood vessels of the superficial dermis. These findings are consistent with the immune complex hypothesis.

Adult↗
PubMed1981

Adverse reactions of the skin to metoprolol and other beta-adrenoreceptor-blocking agents.

Oral provocation tests revealed the relation between long-term oral use of metoprolol and development of psoriasiform and/or eczematous skin lesions in 3 patients. The clinical and histopathological findings in 1 case are described more in detail and are discussed. The data in the recent literature, with respect to side effects of skin due to different beta-blocking agents, are summarized. In addition, some aspects dealing with possible mechanism in the side effects of beta-blocking agents are briefly discussed. Since beta-blocking agents may cause similar side effects, as described during practolol treatment, on should still be alert to this possibility during long-term treatment with (new) beta-blocking agents, which may allow us to prevent serious damage that might occur in different organs.

Adrenergic beta-Antagonists↗
PubMed1981

Granulomatous secondary syphilis coinciding with PUVA treatment in a patient with psoriasis: an apparent failure of PUVA therapy.

A 39-year-old man is described who has been suffering from psoriasis for many years. Because of the extensive involvement of the skin he was treated with PUVA therapy, initially with a good result. A second course of PUVA treatment was unsuccessful. Histopathological examination of the (persisting) skin lesions at this time showed clear granulomatous infiltration, in addition to psoriatic changes. Based on history, serological and dark-field examination, a secondary syphilis was diagnosed. The possible influence of PUVA therapy is discussed.

Adult↗
PubMed1980

Pyodermite végétante of Hallopeau. Immunofluorescence studies performed in an early disease stage.

A 50-year-old woman with autoimmune thyroiditis had an eruption resembling pyodermite végétante as described initially by Hallopeau. Direct immunofluorescence microscopy studies indicated deposition of IgG and C3 in the intercellular area of the epidermis. Circulating IgG antibodies to the intercellular areas of stratified epithelial tissue were demonstrable on indirect immunofluorescence microscopy. Treatment with prednisone and azathioprine resulted in the disappearance of vetetating lesions and in healing, with postinflammatory hyperpigmentation. Immunofluorescence microscopy studies, in an early stage of the disease, are of great value in the diagnosis of pyodermite végétante of Hallopeau. Our findings support the view that pyodermite végétante of Hallopeau belongs immunologically to the pemphigus group.

Animals↗