+big data aus der PCR Analyse. Durch grosse Vergleichs Datensätze und der digitalen Auswertung können bessere Ergebnisse erzielt werden. Weil dann das Thema Mustererkennung hinzu kommt. Dazu muss es aber erst mal zu Massen Screening kommen..also Erstattung. Henne-Ei
The ACS guidelines (Wolf, et al., 2018) do not recommend the SEPT9 DNA test, based upon concerns about poor specificity compared with recommended screening options and the limited base of evidence in asymptomatic, screening populations. In addition, the ACS noted that there has been no microsimulation modeling of the current version of the test to estimate its benefit, a benefit‐harm ratio, or a screening interval for regular testing, which also has not been established by the manufacturer. In addition, methylated Sept9 is a novel blood test for CRC early detection with no comparable screening tests from which to infer a benefit in terms of critical outcomes (CRC mortality or incidence reduction), as there are for the included screening test options. The ACS guidelines note that the test has not been cleared by the FDA for unrestricted use in general routine screening.
Und ProColon 2.0 ist besser offensichtlich auch in Stage I und II
Molnar and colleagues (2015) noted that many countries have implemented various CRC screening programs, but have not achieved the desired compliance. Colonoscopy -- considered the gold standard for CRC screening -- has its limitations as well as the other techniques used, such as irrigoscopy, sigmoidoscopy, fecal blood and hemoglobin tests. The biomarker septin 9 has been found to be hyper-methylated in nearly 100 % of tissue neoplasia specimens and detected in circulating DNA fractions of CRC patients. A commercially available assay for septin 9 has been developed with moderate sensitivity (approximately 70 %) and specificity (approximately 90 %) and a 2nd generation assay, Epi proColon 2.0 (Epigenomics AG), shows increased sensitivity (approximately 92 %). The performance of the assay proved to be independent of tumor site and reaches a high sensitivity of 77 %, even in early cancer stages (I and II). Furthermore, septin 9 was recently used in follow-up studies for detection of early recurrence of CRC. The authors evaluated the opportunities, known limitations and future perspectives of the recently introduced Epi proColon(®) 2.0 test, which is based on the detection of aberrantly methylated DNA of the v2 region of the septin 9 gene in plasma.
Jin and associates (2015) evaluated the performance of the Epi proColon 2.0 test for the detection of CRC, and compared it with FIT. A total of 135 patients with CRC, 169 with adenomatous polyps, 81 with hyperplastic polyps, and 91 healthy controls were included. In all patients, peripheral blood samples were taken for SEPT9 testing using Epi proColon 2.0 test. For 177 patients, both SEPT9 and FIT were performed. The sensitivity and specificity of SEPT9 for CRC were 74.8 % (95 % CI: 67.0 to 81.6 %) and 87.4 % (versus non-CRC, 95 % CI: 83.5 to 90.6 %), respectively. SEPT9 was positive in 66.7 % of stage I, 82.6 % of stage II, 84.1 % of stage III, and 100 % of stage IV CRCs. The sensitivity of SEPT9 for advanced adenomas was 27.4 % (95 % CI: 18.7 to 37.6%). The sensitivity and specificity of FIT for CRC was 58.0 % (95 % CI: 46.1 to 69.2 %) and 82.4 % (95 % CI: 74.4 to 88.7 %), respectively. SEPT9 showed better performance in CRC detection than FIT, but similar among advanced adenomas. The authors concluded that with improved performance characteristics in detecting CRC, the 2nd-generation SEPT9 assay could play an important role in CRC screening and early detection. |