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Dihydro-alpha-lipoic acid has more potent cytotoxicity than alpha-lipoic acid *

Abstract  Alpha-lipoic acid has been shown to possess cancer-cell-killing activity via activation of the apoptosis pathway. In this study, the cytotoxic activities of alpha-lipoic and dihydro-alpha-lipoic acid were compared in HL-60 cells. The cell-killing activity of dihydro-alpha-lipoic acid was higher than that of alpha-lipoic acid. Both alpha-lipoic and dihydro-alpha-lipoic acid induced caspase-3 cleavage and internucleosomal DNA fragmentation in treated cells. On the other hand, apparent necrotic or late-stage apoptotic cell populations could be detected in dihydro-alpha-lipoic acid cells but not in those treated with alpha-lipoic acid. Moreover, dihydro-alpha-lipoic acid, but not alpha-lipoic acid, induced marked mitochondrial permeability transition. Antioxidants could not prevent dihydro-alpha-lipoic- or alpha-lipoic-acid-induced cell death. In addition, dihydro-alpha-lipoic and alpha-lipoic acid did not up-regulate cellular reactive oxygen level. These results indicated that dihydro-alpha-lipoic acid exerts more potent cytotoxicity than alpha-lipoic acid through different cytotoxic actions.

* Legal Disclaimer: Chelation and Hyperbaric Therapy, Stem Cell Therapy, and other treatments and modalities mentioned or referred to in this web site are medical techniques that may or may not be considered “mainstream”. As with any medical treatment, results will vary among individuals, and there is no implication or guarantee that you will heal or achieve the same outcome as patients herein.

As with any procedure, there could be pain or other substantial risks involved. These concerns should be discussed with your health care provider prior to any treatment so that you have proper informed consent and understand that there are no guarantees to healing.

THE INFORMATION IN THIS WEBSITE IS OFFERED FOR GENERAL EDUCATIONAL PURPOSES ONLY AND DOES NOT IMPLY OR GIVE MEDICAL ADVICE. No Doctor/Patient relationship shall be deemed to have arisen simply by reading the information contained on these pages, and you should consult with your personal physician/care giver regarding your medical treatment before undergoing any sort of treatment or therapy.

Published on 02-26-2010
Authors: Masao Yamasaki, Akiko Kawabe, Kentaro Nishimoto, Harishkumar Madhyastha, Yoichi Sakakibara, Masahito Suiko, Takeaki Okamoto, Taiji Suda, Kenzo Uehira and Kazuo Nishiyama
Source: In Vitro Cellular & Developmental Biology - Animal Volume 45, Numbers 5-6 / Май 2009 г., стр. 275-280