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Treatment of acute kidney injury with cast nephropathy

Carl Walther, Amber S Podoll, Kevin W Finkel

    Clinical Nephrology
    |April 15, 2014
    PubMed

    Insights

    Multiple myeloma patients with kidney injury need better treatments. While newer chemotherapy is promising, extended high cut-off hemodialysis (HCO-HD) shows potential for removing harmful proteins, but requires more study.

    Area of Science:

    • Nephrology
    • Oncology
    • Renal Medicine

    Background:

    • Multiple myeloma frequently causes renal disease, primarily acute kidney injury (AKI) from cast nephropathy.
    • AKI in myeloma significantly worsens patient survival and limits treatment options, highlighting the need for effective therapies.
    • Cast nephropathy arises from filtered free light chains (FLCs) and Tamm-Horsfall protein (THP) aggregation, causing tubular obstruction.

    Purpose of the Study:

    • To review the role of extracorporeal therapies in managing cast nephropathy in multiple myeloma.
    • To evaluate the efficacy of extended high cut-off hemodialysis (HCO-HD) compared to previous methods like therapeutic plasma exchange (TPE).

    Main Methods:

    • Review of existing literature on extracorporeal therapies for myeloma kidney.
    • Analysis of trials involving therapeutic plasma exchange (TPE) and extended high cut-off hemodialysis (HCO-HD).

    Main Results:

    • Therapeutic plasma exchange (TPE) has not demonstrated clear renal benefits in larger trials.
    • Extended high cut-off hemodialysis (HCO-HD) shows encouraging results in preliminary studies for removing FLCs.
    • No randomized trials currently confirm HCO-HD's benefit when added to modern chemotherapy regimens.

    Conclusions:

    • Rapid reduction of FLCs is crucial for renal recovery in cast nephropathy.
    • While HCO-HD is a promising extracorporeal therapy for FLC removal, its role as standard care alongside chemotherapy is not yet established.
    • Further randomized trials are necessary to validate the benefits of HCO-HD in multiple myeloma patients with renal disease.

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