Electrical impedance myography as a biomarker to assess ALS progression.
Electrical impedance myography as a biomarker to assess ALS progression.
复制标题
DOI:
10.3109/17482968.2012.688837
复制
发表时间:
2012-09
期刊:
影响因子:
--
通讯作者:
Shefner JM
中科院分区:
文献类型:
--
作者:
Rutkove SB;Caress JB;Cartwright MS;Burns TM;Warder J;David WS;Goyal N;Maragakis NJ;Clawson L;Benatar M;Usher S;Sharma KR;Gautam S;Narayanaswami P;Raynor EM;Watson ML;Shefner JM
Electrical impedance myography (EIM), a non-invasive, electrophysiological technique, has preliminarily shown value as an ALS biomarker. Here we perform a multicenter study to further assess EIM’s potential for tracking ALS. ALS patients were enrolled across eight sites. Each subject underwent EIM, handheld dynamometry (HHD), and the ALS Functional Rating Scale-revised (ALSFRS-R) regularly. Techniques were compared by assessing the coefficient of variation (CoV) in the rate of decline and each technique’s correlation to survival. Results showed that in the 60 patients followed for one year, EIM phase measured from the most rapidly progressing muscle in each patient had a CoV in the rate of decline of 0.62, compared to HHD (0.82) and the ALSFRS-R (0.74). Restricting the measurements to the first six months gave a CoV of 0.55 for EIM, 0.93 for HHD, and 0.84 for ALSFRS-R. For both time-periods, all three measures correlated with survival. Based on these data, a six-month clinical trial designed to detect a 20% treatment effect with 80% power using EIM would require only 95 patients/arm compared to the ALSFRS-R, which would require 220 subjects/arm. In conclusion, EIM can serve as a useful ALS biomarker that offers the prospect of greatly accelerating phase 2 clinical trials.
登录
查看更多内容
影响因子:
4.3
作者:
Tarulli, Andrew W.;Duggal, Naven;Esper, Gregory J.;Garmirian, Lindsay P.;Fogerson, Patricia M.;Lin, Connie H.;Rutkove, Seward B.
通讯作者:
Rutkove, Seward B.
影响因子:
4.4
作者:
Cedarbaum, JM;Stambler, N;Nakanishi, A
通讯作者:
Nakanishi, A
影响因子:
3.4
作者:
Rutkove, Seward B.;Shefner, Jeremy M.;Darras, Basil T.
通讯作者:
Darras, Basil T.
影响因子:
48
作者:
Aggarwal, Swati P.;Zinman, Lorne;Simpson, Elizabeth;McKinley, Jane;Jackson, Katherine E.;Pinto, Hanika;Kaufman, Petra;Conwit, Robin A.;Schoenfeld, David;Shefner, Jeremy;Cudkowicz, Merit
通讯作者:
Cudkowicz, Merit
影响因子:
3.4
作者:
Rutkove, Seward B.
通讯作者:
Rutkove, Seward B.