Abstract |
Dimethylthiourea ( DMTU), a potent hydroxyl radical scavenger, affords protection against cisplatin (CDDP)-induced acute renal failure (ARF). Since the suppression of oxidative stress and the enhancement of heat shock proteins (HSPs) are both reported to protect against CDDP-induced renal damage, we tested whether increased HSP expression is involved in the underlying mechanisms of the DMTU-induced renal protection. We examined the effect of DMTU treatment on the expression of HSPs in the kidney until day 5 following a single injection of CDDP (5 mg/kg BW). DMTU significantly inhibited the CDDP-induced increments of serum creatinine, the number of 8-hydroxyl-2'-deoxyguanosine (8-OHdG)- and terminal deoxynucleotidyl transferase nick-end labeling (TUNEL)-positive tubular cells, and tubular damage score (p<0.05). CDDP significantly increased renal abundances of HO-1, HSP60, HSP72 and HSP90 at days 1, 3, and 5. DMTU significantly augmented only the expression of HSP60 expression mainly in the cytoplasm of the proximal tubular cells at days 1 and 3 in CDDP-induced ARF. DMTU also inhibited the CDDP-induced increment of Bax, a pro-apoptotic protein, in the fraction of organelles/membranes at day 3. The findings suggest that DMTU may afford protection against CDDP-induced ARF, partially through the early induction of cytoplasmic HSP60, thereby preventing the Bax-mediated apoptosis in renal tubular cells.
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Authors | Takayuki Tsuji, Akihiko Kato, Hideo Yasuda, Takehiko Miyaji, Jinghui Luo, Yukitoshi Sakao, Hideaki Ito, Yoshihide Fujigaki, Akira Hishida |
Journal | Toxicology and applied pharmacology
(Toxicol Appl Pharmacol)
Vol. 234
Issue 2
Pg. 202-8
(Jan 15 2009)
ISSN: 1096-0333 [Electronic] United States |
PMID | 18992762
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antineoplastic Agents
- Heat-Shock Proteins
- Proto-Oncogene Proteins c-bcl-2
- bcl-2-Associated X Protein
- 1,3-dimethylthiourea
- Heme Oxygenase-1
- Thiourea
- Cisplatin
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Topics |
- Acute Kidney Injury
(chemically induced, metabolism, prevention & control)
- Animals
- Antineoplastic Agents
(antagonists & inhibitors, toxicity)
- Blotting, Western
- Cisplatin
(antagonists & inhibitors, toxicity)
- Heat-Shock Proteins
(biosynthesis)
- Heme Oxygenase-1
(metabolism)
- Immunohistochemistry
- In Situ Nick-End Labeling
- Kidney
(drug effects, metabolism)
- Male
- Proto-Oncogene Proteins c-bcl-2
(biosynthesis, genetics)
- Rats
- Rats, Sprague-Dawley
- Thiourea
(analogs & derivatives, pharmacology)
- bcl-2-Associated X Protein
(biosynthesis, genetics)
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