Factors affecting expression and transcription of uncoupling protein 2 gene
| Autor: | Masaru Murakami, Manami Matsumura, Rajesh Jha, Mayuko Ikeda, Hiroyuki Sadakane, Tohru Matsui, Doo Hyun Kim, Masayuki Funaba, Zhicheng Diao, Yuka Nishikiori |
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| Rok vydání: | 2020 |
| Předmět: |
uncoupling protein 2
XBP1 JUNB medicine.disease_cause Biochemistry Ion Channels Mitochondrial Proteins Mice Transcription (biology) expression medicine Animals Transcription factor chemistry.chemical_classification Reactive oxygen species Full Paper General Veterinary Chemistry Endoplasmic reticulum Cell biology Oxidative Stress Unfolded protein response Cattle transcription Reactive Oxygen Species Oxidative stress |
| Zdroj: | The Journal of Veterinary Medical Science |
| ISSN: | 1347-7439 0916-7250 |
| DOI: | 10.1292/jvms.20-0444 |
| Popis: | Previous studies suggest a negative relationship between hepatic oxidative stress and productivity in beef cattle. Uncoupling protein 2 (UCP2) is involved in the disappearance of reactive oxygen species, suggesting the defensive role of UCP2 against oxidative stress. The present study examined the relationship between oxidative stress and expression levels of UCP2/Ucp2 in cultured human and mouse liver-derived cells. We also explored factors regulating bovine Ucp2 transcription. As oxidative stress inducers, hydrogen peroxide, ethanol, and cumene hydroperoxide (CmHP) were used. Expression levels of hemoxygenase 1 (HMOX1), a representative gene induced by oxidative stress, were not affected by any oxidative stress inducers in HepG2 human liver-derived cells. The levels of UCP2 mRNA were also unaffected by the oxidative stress inducers. Treatment with CmHP increased expression of Hmox1 in Hepa1-6 mouse liver-derived cells, but Ucp2 expression was not changed. Stimulus screening for regulator of transcription (SSRT) revealed that expression of p50 or p65, transcription factors conferring response to oxidative stress, did not stimulate bovine Ucp2 transcrition in HepG2 cells. SSRT also showed 11 molecules that induced Ucp2 transcription more than 4-fold; among them, endoplasmic reticulum (ER) stress-related transcription factors such as XBP1, c-JUN, JUNB, and C/EBPβ were identified. However, treatment with ER stress inducers did not increase Ucp2 expression in HepG2 and Hepa1-6 cells. The present results suggest that 1) neither oxidative stress nor ER stress induces Ucp2 expression in liver-derived cells, and 2) Ucp2 transcription is stimulated by several transcription factors. |
| Databáze: | OpenAIRE |
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