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J Clin Apher. 2016 Dec;31(6):535-544. doi: 10.1002/jca.21446. Epub 2016 Jan 23.

Immunoadsorption therapy for dilated cardiomyopathy using tryptophan column-A prospective, multicenter, randomized, within-patient and parallel-group comparative study to evaluate efficacy and safety.

Author information

1
Department of Cardiology, Sakakibara Heart Institute, Fuchu, Japan.
2
Department of Cardiology, Kitasato Institute Hospital, Tokyo, Japan.
3
Department of Nephrology, Kitasato Institute Hospital, Tokyo, Japan.
4
Medical Education Center, Keio University School of Medicine, Tokyo, Japan.
5
Cardiovascular Division of Medicine, National Cardiovascular Research Center, Suita, Japan.
6
Department of Cardio-Angiology, Kitasato University School of Medicine, Sagamihara, Japan.

Abstract

Over the past few decades, several cardiac autoantibodies have been reported in sera from patients with dilated cardiomyopathy (DCM). Immunoadsorption (IA) therapy is one of the therapeutic tools to remove such autoantibodies. The objective of this study was to investigate functional effects of IA therapy using a tryptophan column in severe DCM patients. Of 49 patients enrolled, 44 were randomized from 10 sites in Japan. IA therapy was conducted in 40 patients with DCM (refractory to standard therapy for heart failure, New York Heart Association [NYHA] class III/IV, left ventricular ejection fraction [LVEF] <30%). Mean echocardiographic LVEF was significantly improved (23.8 ± 1.3% to 25.9 ± 1.3%, P = 0.0015). However, mean radionuclide LVEF over 3 months of IA therapy was not significantly improved (20.8 ± 1.1% to 21.9 ± 1%, P = 0.0605). The cardiothoracic ratio was also significantly decreased (P = 0.0010). NYHA functional class (P < 0.0001), subjective symptoms assessed by a quality of life questionnaire (P = 0.0022), maximum oxygen consumption (P = 0.0074), and 6-minute walk distance (P = 0.0050) were improved after IA therapy. Subgroup analysis revealed improvement of echocardiographic LVEF in patients with higher baseline autoantibody scores but not in those with lower scores. IA therapy improved subjective symptoms and exercise capacity in patients with refractory heart failure resulting from DCM. Favorable effect on cardiac function was noted in patients with higher autoantibody scores. J. Clin. Apheresis 31:535-544, 2016.

KEYWORDS:

antibodies; dilated cardiomyopathy; heart failure; immune system

PMID:
26801483
PMCID:
PMC5123585
DOI:
10.1002/jca.21446
[Indexed for MEDLINE]
Free PMC Article

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