RE: Surprise surprise.2 Aug 2024 10:32
Moab,
1)
It is currently understood (please see 94 peer reviewed articles) that primary tumors shed tumor cells. These cells ( which are whole intact living tumor cells that "if" captured can be presented for downstream analysis. Thus providing Protein, DNA & RNA samples that are equal to tissue biopsy) circulate in the blood stream. Hence they are called Circulating Tumor Cells (CTC's).
The blood stream is an inhospitable environment for these CTC's, as such in most cases they are destroyed before they are able to seed at secondary sites in the body.
2)
In such a case that the CTC's are able survive and seed at a secondary site then these secondary (or metastatic) tumors shed CTC's and these circulate within the inhospitable enviroment that is the blood stream etc etc.
3)
Should a cancer change or evolve (for example to avoid a Tcell response), then the CTC's that it sheds can be captured in the same way. Allowing for a comparison to be made to the primary or secondary tumor (evolution).
So, Parsortix is totally is a reliable means of capturing CTC's from the blood stream whether that be from case 1 or 2 or even 3. Note but If the blood stream has already destroyed the CTC's then clearly there isn't any remaining CTC's that can be captured. However, if there are CTC's yet to have been destroyed then Parsortix captures some which can be presented for downstream analysis.
I see your point but you are presuming that CTC's only come from the metstatsic sites? This is not the case, CTC's are present before and after a secondary tumor appears. So tumors shed CTC's and Parsortix captures them. My Point is there is a lack of complimentary analysis but that is and will change over time. Angle are having to do all the leg work of producing reliable kits, test, reagents etc to prove the purpose.
Parsortix works. It is the downstream analysis that needs to measure up! Just my opinion but the current NGS are not good enough presently. So Angle are working on carving out an overhaul with one of these NGS companies. Maybe Illumina?
You know, cars and trucks have replaced horse and carts and barges!