T-2 Toxin Induces Epiphyseal Plate Lesions via Decreased SECISBP2-Mediated Selenoprotein Expression in DA Rats, Exacerbated by Selenium Deficiency
| Autor: | Jian Sun, Zixin Min, Yuanxu Guo, Dongxian Guo, Yitong Zhao, Fujun Zhang, Yan Han, Wenxiang Zhao, Peng Xu, Huang Huang, Mengyao Sun, Nannan Zhong, Shemin Lu, Safdar Hussain |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Cartilage Articular medicine.medical_specialty Epiphyseal plate T2 toxin Biomedical Engineering chemistry.chemical_element Physical Therapy Sports Therapy and Rehabilitation medicine.disease_cause 03 medical and health sciences Selenium 0302 clinical medicine Basic Science Selenium deficiency Internal medicine medicine Immunology and Allergy Animals Growth Plate Selenoproteins 030203 arthritis & rheumatology chemistry.chemical_classification Kashin-Beck Disease Kashin–Beck disease Toxin RNA-Binding Proteins medicine.disease Rats Disease Models Animal T-2 Toxin 030104 developmental biology medicine.anatomical_structure Endocrinology chemistry Selenoprotein Mycotoxin T2 |
| Zdroj: | Cartilage |
| ISSN: | 1947-6043 |
| Popis: | Objective Both selenium (Se) deficiency and mycotoxin T2 lead to epiphyseal plate lesions, similar to Kashin-Beck disease (KBD). However, regulation of selenoproteins synthesis mediated by SECISBP2, in response to these 2 environmental factors, remained unclear. The present study proposed to explore the mechanism behind the cartilage degradation resulting from Se deficiency and mycotoxin T2 exposure. Design Deep chondrocyte necrosis and epiphyseal plate lesions were replicated in Dark Agouti (DA) rats by feeding them T2 toxin/Se deficiency artificial synthetic diet for 2 months. Results Se deficiency led to decreased expression of COL2α1, while T2 treatment reduced the heparan sulfate 6-O-sulfotransferase 2 (HS6ST2) expression, both of which affected the cartilage extracellular matrix metabolism in the rat models. The expression of Col2α1, Acan, Hs6st2, Secisbp2, Gpx1, and Gpx4 were all significantly decreased in cartilage tissues from DA rats, fed a Se-deficient diet or exposed to T2 toxin, contrary to Adamts4, whose expression was increased in both conditions. In addition, T2 treatment led to the decreased expression of SBP2, GPX1, GPX4, and total GPXs activity in C28/I2 cells. Conclusion DA rats exposed to T2 toxin and/or Se-deficient conditions serve as the perfect model of KBD. The 2 environmental risk factors of KBD, which serve as a “double whammy,” can intensify the extracellular matrix metabolic imbalance and the antioxidant activity of chondrocytes, leading to articular cartilage degradation and epiphyseal plate abnormalities similar to those observed in KBD. |
| Databáze: | OpenAIRE |
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