Biomedical subjects

A Demulder

Publications and source records attributed to A Demulder.

22 records · Page 2Linked to original sources

PubMed1987

[Comparative study of the diagnostic contribution of C-terminal and medio-regional determination of parathyroid hormone in man].

In this study, we compared serum parathyrin radioimmunoassay values obtained with three commercially available kits in a series of normal subjects, patients on dialysis, patients with primary hyperparathyroidism and with hypercalcemia due to malignancy. The calcium of these subjects was simultaneously evaluated. Two of these three kits measure two different C-terminal portions of the molecule and the third the mid region of PTH. The Behring and Byk kits were most efficient in that the results were obtained rapidly. The mid region assay is not more contributive than the C-terminal assays. Among these, the Behringer kit seems to produce the best diagnostic discrimination when the PTH and calcium are coupled. As far as the diagnostic specificity is considered, the latter kit seems however less efficient than the two others.

Chemical Phenomena↗

PubMedDate not supplied

Multinucleated cells formed in vitro from Paget's bone marrow express viral antigens.

Paget's disease of bone is characterized by large numbers of osteoclasts that have viral-like nuclear and/or cytoplasmic inclusions. Pagetic osteoclasts express respiratory syncytial viral (RSV) and measles viral (MV) nucleocapsid antigens. The data suggest a possible viral etiology for Paget's disease. However, studies to characterize further the putative viral inclusions in Paget's osteoclasts have been severely hampered by the extreme difficulty in isolating large numbers of osteoclasts from pagetic bone. The recent demonstration that osteoclast-like multinucleated cells (MNC), that had certain characteristics of pagetic osteoclasts formed in marrow cultures from Paget's patients, may permit studies to describe this virus further. Therefore, we have cultured marrow samples from involved and uninvolved bones from Paget's patients and from normal subjects to determine if the MNC formed in these cultures express viral antigens. RSV and/or MV antigens were expressed in the mononuclear cells and/or the MNC formed in 12 of 12 marrow cultures from active lesions of patients with Paget's disease, with 40-50% of the cells expressing viral antigens. In contrast, less than 5% of cells isolated from cultures from normal subjects expressed RSV and/or MV. These results suggest that MNC formed in long-term marrow cultures from patients with Paget's disease frequently express paramyxoviral antigens and are very similar to pagetic osteoclasts. Thus, these marrow cultures may be useful for further characterizing the virus in Paget's disease.

Aged↗

PubMedDate not supplied

Recurrent viral associated hemophagocytic syndrome in a child with Langerhans cell histiocytosis.

Langerhans cell histiocytosis (LCH) with subsequent viral-associated hemophagocytic syndrome (VAHS) or secondary hemophagocytic lymphohistiocytosis (HLH) is extremely rare. A 15-month-old girl with disseminated LCH experienced three episodes of VAHS during maintenance therapy. Viral infection, with influenza A, herpes simplex, and adenovirus, respectively, was documented at each episode. She recovered each time after interruption of maintenance therapy. The occurrence of fever and pancytopenia in patients with chemotherapy-treated LCH can be associated with VAHS and not with relapsing LCH.

Adenoviruses, Human↗

PubMedDate not supplied

Triflusal versus acetylsalicylic acid: a double-blind study for the prophylaxis of deep vein thrombosis after hip surgery.

The authors report the results of a randomised double-blind study comparing the antithrombotic activity of a new anti-platelet drug (Triflusal) with that of acetylsalicylic acid (ASA). 99 patients who underwent hip surgery were included in the study (total hip replacement, osteosynthesis of a pertrochanter fracture or Moore's prosthesis for intracapsular fracture of the femoral neck). Of the 48 patients having received Triflusal, 7 (14.5%) developed deep vein thrombosis as indicated by 125I-fibrinogen isotopic scanning and confirmed by phlebography. Of the 51 patients treated with ASA, 11 (21.6%) presented the same complication as diagnosed by the same techniques. This difference is not statistically significant, considering the number of cases studied. Nevertheless, Triflusal appears to provide prevention of thromboembolic risk to patients who have undergone hip surgery, particularly total hip replacement.

Adult↗