Biomedical subjects

R Küppers

Publications and source records attributed to R Küppers.

75 records · Page 5Linked to original sources

PubMed1992

[Detection of clonal immunoglobulin rearrangements in paraffin embedded tissues by PCR].

A polymerase chain reaction based method was established using immunoglobulin VH and VK gene rearrangements as markers to detect clonal B cell populations in paraffin embedded sections. Family specific VH and VK primers are used in separate reactions together with the corresponding J primers to amplify rearranged VH and VK genes from genomic DNA. This allows to distinguish clonal from polyclonal B cell populations in most of the cases. The method may be helpful in routine diagnosis of B cell NHL and some morphological and immunohistochemical difficult cases.

Base Sequence↗

PubMed1991

B cells of chronic lymphatic leukemia express V genes in unmutated form.

In order to investigate whether the leukemic B cells in B-CLL express immunoglobulin genes in mutated or unmutated form, independent cDNA clones of one patient with B-CLL expressing heavy and light chain V region genes were sequenced. The sequences of both the VH and V kappa clones were identical. The V genes could be assigned to known germline V genes. No somatic mutations were found. At the V kappa-J kappa border there is an insertion of N-sequences which are only rarely found in immunoglobulin light chain genes. Our study confirms other published data on V gene expression in B-CLL in that the surface immunoglobulins in these tumors are unmutated.

Antigens, Differentiation↗

PubMed1988

Investigation of the performance of the ES 600 Enzymun-Test system. A multicentre study.

The ES 600 sample-selective multibatch analyser was subjected to a multicentre evaluation in six laboratories in accordance with ECCLS guide-lines. During the 3-month trial, five Enzymun-Test diagnostics (T4, TBG, Digoxin, CEA and TSH)1) were measured at 25 degrees C. The study yielded the following results: 1. The within-series and between-series precision were very good, with mean CV's of approx. 3% and 7% respectively. 2. Recovery of the target values for three control sera was in the range +/- 5%. 3. A trend in measurements did not occur in any of the methods investigated (for series of over 240 determinations). 4. Comparison of the results with those obtained on the ES 22 Enzymun-Test system showed good agreement. 5. Within the measuring range defined by the standards, no deviations could be ascertained upon dilution of the samples. 6. Total carry-over in the instrument was below 0.05%. From studies with instruments from the first production series, it became evident that modifications were necessary to improve the reliability. A follow-up measuring programme confirmed a clear improvement in reliability and a reduction in the imprecision, particularly for results from series to series.

Carcinoembryonic Antigen↗