Langzeitwirkung von CHEMOS im Hirn von Ratten’/Zeitschrift: Metabolic Brain Disease/10/08

Patienten:..“Nebel im Hirn…“..“Gedächtnisverlust“..

Study suggests way to offset chemobrain memory loss

Cancer patients have complained for years about the mental fog known as chemobrain. New research shows that injections of N-acetyl cysteine (NAC) can prevent the memory loss that breast cancer chemotherapy drugs induce.

Cognitive dysfunction induced by chronic administration of common cancer chemotherapeutics in rats <
Zeitschrift Metabolic Brain Disease
Verlag Springer Netherlands

ISSN 0885-7490 (Print) 1573-7365 (Online)
Heft Volume 23, Number 3 / September 2008
Kategorie Original Paper
DOI 10.1007/s11011-008-9100-y

Seiten 325-333

Fachgebiete Biomedizin & Life Sciences

SpringerLink Date Samstag, 9. August 2008

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Original Paper

Cognitive dysfunction induced by chronic administration of common cancer chemotherapeutics in rats

Gregory W. Konat1 , Michal Kraszpulski1, Isaac James1, Han-Ting Zhang2 and Jame Abraham3

(1) Department of Neurobiology and Anatomy, West Virginia University School of Medicine, 4052 HSCN, P.O. Box 9128, Morgantown, WV 26506-9128, USA

(2) Department of Behavioral Medicine and Psychiatry, West Virginia University School of Medicine, Morgantown, WV, USA

(3) Mary Babb Randolph Cancer Center, West Virginia University School of Medicine, Morgantown, WV, USA

Received: 13 March 2008 Accepted: 8 June 2008 Published online: 9 August 2008

Abstract Although cognitive dysfunction manifested by severe memory and attention deficits has been reported in up to 70% of cancer patients undergoing chemotherapy, the mechanisms of this serious side effect have not been defined. In particular, it has not been decisively resolved whether the dysfunction is attributable to the chemotherapy or to the malignancy itself. In the present study we tested whether cognitive dysfunction can be induced in an experimental setting by the administration of commonly used chemotherapeutics to rats. Female 10 month old Sprague–Dawley rats were injected intraperitoneally with a combination of 2.5 mg/kg of adriamycin (ADR) and 25 mg/kg of cytoxan (CTX). A total of four doses were given at weekly intervals. The control group was treated with saline only. No mortality and no apparent morbidity were observed in either group. However, the chemotherapeutic treatment severely impaired memory function of rats as measured by a passive avoidance test. This memory deficiency was fully prevented by the administration of an antioxidant, N-acetyl cysteine (NAC) injected subcutaneously three times a week at 200 mg/kg in the course of chemotherapeutic treatment. These results indicate that chemotherapeutic agents alone, i.e., in the absence of malignancy, damage the brain resulting in memory dysfunction. Moreover, the results strongly indicate that the damaging effect is mediated by oxidative stress, as memory dysfunction is preventable by the co-administration of NAC.

Keywords Adriamycin – Cytoxan – N-Acetyl cysteine – Memory impairment

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Gregory W. Konat

Email: gkonat@wvu.edu

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