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Biomedical subjects

M Zeher

Publications and source records attributed to M Zeher.

13 recordsLinked to original sources
PubMed1991

Macrophage containing factor XIII subunit a in salivary glands of patients with Sjögren's syndrome.

Minor labial salivary glands obtained at biopsy from patients with Sjögren's syndrome were investigated by immunomorphological methods for the presence of monocyte-derived macrophages. According to our observations published earlier the immunomorphological detection of factor XIII subunit a is a useful marker for recognizing cells of monocyte/macrophage lineage. Factor XIII subunit a was detected by a highly sensitive immunoperoxidase staining, and cells containing this coagulation enzyme were characterized by double immunofluorescence stainings. Factor XIII subunit a+ cells were found to be highly accumulated at the interface of normal tissue and peritubular infiltrate. In double immunofluorescence labelling systems factor XIII subunit a+ cells were simultaneously labelled by RFD7 and Dako-antimacrophage monoclonal antibodies. They also expressed HLA-DR antigen as revealed by a reaction with RFDR2 monoclonal antibody. The results suggest that monocyte-derived tissue macrophages are present in salivary glands of patients with Sjögren's syndrome and have a characteristic distribution. It can be assumed that they have a role in the demarcation of peritubular inflammation and thus have an effect on the progression of the disease.

Adult↗
PubMed1990

[Reflections on non-differentiated collagenosis or non-differentiated autoimmune syndrome].

The authors review the Non-Differentiated Collagenosis (NDC) described by Gyula Petrányi 29 years ago, and try to establish whether it is still necessary to maintain this clinical picture. Relying on data from special literature and on their own findings, the authors conclude that the maintenance of the NDC terminology is justified by the fact that poly-systemic autoimmune diseases take time to develop and that at certain stages of this development it is almost impossible to make a firm decision as to which clinical picture the process will lead to. The authors discuss the clinical and immunological features of NDC, the implications for the patients and things to be done in order to recognise the NDC disease process. They also emphasize a more frequent occurrence of the features of NDC than is generally stated, and that such patients need regular, competent and devoted medical attention.

Autoimmune Diseases↗
PubMed1990

Activation antigens in patients with Sjögren's syndrome.

We report findings of a study of two receptors on mononuclear cells from patients with Sjögren's syndrome (SS). The two receptors, interleukin-2 receptor (IL-2), transferrin receptor (TfR), were identified using monoclonal antibodies anti-IL-2 and OKT9. We found that the IL-2 and TfR positive cells were significantly higher on mononuclear cells (MC) from peripheral blood (PB) of patients with SS than in healthy controls. The study revealed that the IL-2 and TfR positivity reflects systemic immune activation and correlates closely with the activity of SS.

Adult↗
PubMed1989

[Forme fruste of Hunter's disease].

We report on a 19-year-old girl with hepatosplenomegaly and possible hematological disease. We suspected Gaucher's disease on account of histological and biochemical evidence found in specimens from the liver, spleen, and bone marrow. 18 months later, pebbled skin developed on her neck and upper back. Histological examination revealed large amounts of mucous material between the collagen bundles deep in the dermis, which proved to be dermatan sulfate. The clinical and histological symptoms are characteristic for Hunter's disease.

Adult↗
PubMed1988

Function of monocytes in patients with systemic sclerosis.

Functions of monocytes from the peripheral blood of 23 patients with systemic sclerosis were investigated in vitro. The yeast phagocytosis, opsonized yeast phagocytosis and binding of EA (erythrocyte-antibody) particles were found to be normal. A depressed chemotactic response was demonstrated against a zymosan-activated, complement-derived chemotactic factor. In 12 cases, monocytes were cultured for 168 hours. By the 5th and 7th days, the initially depressed chemotactic activity of monocytes returned to normal as compared to controls. This fact supports the speculation that the decreased chemotaxis cannot be caused by an intrinsic abnormality of monocytes/macrophages in systemic sclerosis.

Adult↗
PubMed1987

Polymorphonuclear neutrophil function in systemic sclerosis.

In vitro functions of polymorphonuclear (PMN) neutrophils were studied in 20 patients with progressive systemic sclerosis (PSS). An increase in the basal chemiluminescence (CL) activity of peripheral blood PMNs was found, suggesting that these cells had been preactivated in vivo. Patients with more extensive skin disease or signs of disease progression tended to have higher basal CL values. Active oxygen products during the respiratory burst may increase the extent of inflammatory and fibrotic processes and could be involved in the endothelial injury in PSS. The stimulatory capacity of CL response was normal in our study. No alterations were found in the opsonised yeast phagocytic activity of granulocytes when compared with control values. The binding of erythrocyte-antibody particles was found also to be normal. A depressed chemotactic activity of PMN cells against zymosan activated serum was also shown. The cause of the decreased chemotaxis of PMNs remains to be elucidated.

Adult↗
PubMed1987

Altered monocyte functions in patients with angioimmunoblastic lymphadenopathy.

Monocyte function was investigated in ten patients with angioimmunoblastic lymphadenopathy (AILD). Although spontaneous migration, phagocytosis and opsonisation of monocytes were unimpaired, the chemotactic response and erythrocyte-antibody-rosette (EA-rosette) formation were decreased significantly. The migratory response of normal monocytes was inhibited on preincubation with serum from AILD patients. It is suggested that the immune abnormality in AILD, previously thought to involve T-B and natural killer lymphocytes, extends to the monocyte-macrophage system.

Adult↗
PubMedDate not supplied

CD5 positivity on peripheral blood B lymphocytes in patients with primary Sjögren's syndrome.

The increased number of the CD5+ (Leu 1) B cells in 9 of 17 patients with primary Sjögren's syndrome (SS) were found in this study. The percentage of CD5+ B cells that demonstrated an increased number of these cells was more than 45% in patients with pSS, and the normal level 26.3 +/- 8.8% in control subjects. The ratio of the CD5+ B cells was higher if the pSS was in the active stage.

Antigens, CD↗