A New Therapeutic Approach to Dialysis Amyloidosis: Intensive Removal of β₂‐Microglobulin with Adsorbent Column

Abstract

Amyloidosis, in which amyloid protein consists of beta 2-microglobulin (beta 2-M), is both a common and a serious complication of long-term hemodialysis. The mechanism of its development is not completely understood. Since beta 2-M is an amyloid protein, it is essential to try to remove as much of it as possible. A specific adsorbent of beta 2-M has been developed for use in direct hemoperfusion. The adsorbent is a porous cellulose bead to which hydrophobic organic compound is bound covalently. A combination of a high-flux membrane dialyzer and an adsorption column (BM-01) would make it possible to efficiently eliminate beta 2-M. Dialysis with a combination of direct hemoperfusion (DHP) and an adsorption column led to the elimination of more than 200-300 mg of beta 2-M. We observed 5 patients who received treatment with this column (BM-01) in combination with high-flux dialysis 3 times a week for periods of 1 week (3 patients), 6 months (1 patient), or 14 months (1 patient). It is demonstrated that the adsorbent column (BM-01) provides an intensive method to eliminate beta 2-M from the blood with no serious adverse effect. It thus has the potential to suppress the progression of dialysis amyloidosis. The use of this adsorbent column (BM-01) in combination with a high-flux dialyzer may present an improved approach to removing beta 2-M from the body.