Biomedical subjects

W Mempel

Publications and source records attributed to W Mempel.

At least 109 records · Page 6Linked to original sources

PubMed1980

Recognition of a positive MLC reaction after four hours.

EMT indicator cells were incubated for 1 h in the supernatant of a 3 h MLC. Their electrophoretic mobility was then measured by an analytical, carrier-free electrophoresis system. The alteration of their mobility against a medium-standard was calculated in per cent and correlated with the conventional measured MLR-cpm. According to our results the correlation of the two quantities is statistically highly significant. This method could enable recognition of a positive or negative MLC after only 4 h. This fact could be of great importance for histocompatibility testing and transplantation.

Cell Movement↗

PubMed1978

In vitro stimulation with mitogen and antigen in patients with monoclonal gammopathy.

Peripheral blood lymphocytes from 32 patients with defined paraproteinaemia (16 IgG, 9 IgA and 7 IgM) and from 15 healthy donors were studied for their in vitro response to various stimuli, including for unspecific mitogens such as Phytohaemagglutinin (PHA), Pokeweed mitogen (PWM) and Concanavalin A (ConA) as well as specific antigens such as purified Tuberculin, Candida, Varidase, Tetanus Toxoid, Vaccinia antigen and Vaccinia-control antigen. Mitogens and antigens were lyophilized in Microtiter plates. The lymphocytes of all tested patient-groups responded (measured by H3-Thymidin-uptake) significantly lower towards the unspecific mitogens than those of the control group. If the patients' lymphocytes were stimulated by the specific antigens, their in vitro response was significantly diminished to candida and vaccinia. Macroglobulinaemia showed significantly lower response to ConA if compared to myelomas of IgG- and IgA-type. No correlation was found between mitogen and antigen response and the serum concentration of the paraproteins or immunoglobulins. The results show that monoclonal gammopathy and especially macroglobulinaemia are associated with abnormalities of the cellular immunity which correlates with the clinical observation of increased fungal and viral infections.

Adult↗

PubMed1975

LD typing in man using cells frozen and stored in microtiter plates.

A method of freezing LD typing cells in microtiter plates was developed. Two times 10(5) lymphocytes in a small volume (15 mul) with a low DMSO concentration (5%) were directly frozen in a --70 degrees C freezer. These cells were used in the mixed lymphocyte culture after thawing by diluting step-by-step with serum and culture medium without washing. The kinetics obtained with cells frozen in microtiter plates were comparable to those with fresh cells. Typing for LD determinants was performed in a group of unrelated persons in a family study using the LD homozygous reference cell Pi frozen in microtiter plates.

Epitopes↗

PubMed1975