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Biotech / Medical : Techniclone (TCLN)

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To: Maurice Winn who wrote (2394)8/6/1998 11:14:00 PM
From: Bob L  Read Replies (1) of 3702
 
Maurice, a small point: It may be an oversimplification to say "Rituxan will target maybe 99% of the cancer cells in strongly CD20 positive people, you get relapse as the last 1% replicate." CD20-positive cells may appear in 90 or 99% of lymphoma patients, but the antibodies in Rituxan and Bexxar do not necessarily bind well to all of those cells. It appears that the cell shape/type of the particular lymphoma is a major factor. Rituxan and Bexxar appear to bind better to follicular cells than other types. This may be a better explanation of the less than 100% response rate and eventual relapse, than assuming that there is often only 1% of remaining cancer cells.

Cell type variations may also be part of the explanation of why Oncolym doesn't produce 100% response rates, but I haven't seen written speculation on this point.
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