Abstract |
Trimethyltin (TMT) is an organotin neurotoxicant with effects that are selectively localized to the limbic system (especially the hippocampus), which produces memory deficits and temporal lobe seizures. Galectin-3 (Gal-3) is a beta-galactoside-binding lectin that is important in cell proliferation and regulation of apoptosis. The present study evaluated the temporal expression of Gal-3 in the hippocampus of adult BALB/c mice after TMT treatment (i. p., 2.5mg/kg). Western blotting analyses showed that Gal-3 immunoreactivity began to increase days after treatment; the immunoreactivity peaked significantly within days after treatment but significantly declined between days 4 and 8. Immunohistochemical analysis indicated that Gal-3 expression was very rare in the hippocampi of vehicle-treated controls. However, Gal-3 immunoreactivity appeared between 2 and 8 days after TMT treatment and was primarily localized to the hippocampal dentate gyrus (DG), in which neuronal degeneration occurred. The immunoreactivity was detected predominantly in most of the Iba1-positive microglia and in some GFAP-positive astrocytes of the hippocampal DG. Furthermore, Gal-3 expression co-localized with the pro-inflammatory enzymes cyclooxygenase-2 and inducible nitric oxide synthase in the hippocampal DG. Therefore, we suggest that Gal-3 is involved in the inflammatory process of neurodegenerative disorder induced by organotin intoxication.
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Authors | Miyoung Yang, Juhwan Kim, Taehyub Kim, Sung-Ho Kim, Jong-Choon Kim, Jeongtae Kim, Chitoshi Takayama, Akinobu Hayashi, Hong-Gu Joo, Taekyun Shin, Changjong Moon |
Journal | Neurochemistry international
(Neurochem Int)
Vol. 61
Issue 7
Pg. 955-62
(Dec 2012)
ISSN: 1872-9754 [Electronic] England |
PMID | 23063466
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2012 Elsevier Ltd. All rights reserved. |
Chemical References |
- AIF1 protein, human
- Calcium-Binding Proteins
- DNA-Binding Proteins
- Galectin 3
- Glial Fibrillary Acidic Protein
- Microfilament Proteins
- Trimethyltin Compounds
- trimethyltin
- Nitric Oxide Synthase Type II
- Cyclooxygenase 2
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Topics |
- Animals
- Blotting, Western
- Calcium-Binding Proteins
- Cyclooxygenase 2
(metabolism)
- DNA-Binding Proteins
(metabolism)
- Galectin 3
(metabolism, physiology)
- Glial Fibrillary Acidic Protein
(metabolism)
- Hippocampus
(cytology, drug effects, enzymology, metabolism)
- Immunohistochemistry
- Male
- Mice
- Mice, Inbred BALB C
- Microfilament Proteins
- Microglia
(drug effects, metabolism)
- Nitric Oxide Synthase Type II
(metabolism)
- Trimethyltin Compounds
(pharmacology)
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