maintrac^®- diagnostics – prior to, during, and after cancer therapy

maintrac^® is a blood test that allows us to detect cells which have left the tumor and entered the bloodstream.

Some of these so-called circulating (epithelial) tumor cells (CETCs / CTCs) may be responsible for metastases (metastatic spread) occurring, and thus responsible for further progression of the disease.

Using the maintrac^® cell count, the extent to which a treatment is proving successful can be monitored. For this assessment, the number of circulating cells is determined before therapy start, and is compared with the number of cells over the course of therapy. The resulting progression of results gives an indication of whether cells are being destroyed by the cancer therapy, i.e. whether the patient is responding to the treatment. Should this not be the case, there is the possibility of testing other substances directly on the circulating tumor cells.

Some substances are only effective in the treatment of cancer if the tumor exhibits certain properties. maintrac^® can determine whether these therapy-relevant properties are exhibited in the tumor cells.

Only 15 ml of EDTA blood needs to be taken from the patient by the treating physician, or in the specialized medical laboratory Dr. Pachmann, which is then subsequently analyzed in the diagnostic laboratory.

maintrac^® helps each individual patient to find a unique, personalized and effective therapy, allowing for the success of the therapy to be monitored.

Methodology of the maintrac^® analysis

Due to the high sensitivity of the techniques involved, CETCs / CTCs can be detected shortly after a primary tumor has been diagnosed, and as such a therapy decision can be made in good time. This early detection relies mainly on the fact that maintrac^® is highly-sensitive because the cells from the blood sample are analyzed in real-time, contrasting with other methods where cells tend to be fixed, isolated or enriched. This allows a quantitative determination of CETCs / CTCs even in the early stages of disease, and not only once a metastatic stage has been reached.

1. In addition to circulating epithelial cells, white blood cells (leukocytes) are also found in blood. After lysis of the erythrocytes (disintegration of the red blood cells), the blood is tested for the presence of epithelial cells. On the surface of epithelial cells, a cell-surface protein (EpCAM) can be found, which is marked in the maintrac^® process using a fluorescent antibody.
2. At the same time, propidium iodide is added, which can penetrate the cell membrane of dead cells, allowing for dead (red/green stained) and living (green stained) cells to be distinguished from one another.
3. Using a fluorescence microscope, the marked cells can now automatically be identified and counted.
4. If the maintrac^® diagnostic process is employed several times at defined time intervals, results can give a reflection of therapy success and tumor activity over the course of patient progress.