PMID- 24737445 OWN - NLM STAT- MEDLINE DCOM- 20141230 LR - 20201209 IS - 1791-244X (Electronic) IS - 1107-3756 (Linking) VI - 34 IP - 1 DP - 2014 Jul TI - Estrogen is a novel regulator of Tnfaip1 in mouse hippocampus. PG - 219-27 LID - 10.3892/ijmm.2014.1742 [doi] AB - Tumor necrosis factor‑induced protein 1 (Tnfaip1), also known as B12, has been previously identified as a tumor necrosis factor-alpha (TNF-alpha)-inducible protein and is involved in the cytokinesis signaling pathway, DNA synthesis, innate immunity, cell apoptosis, Alzheimer's disease (AD) and type 2 diabetic nephropathy. However, little is known regarding the expression of Tnfaip1 in various tissues or its accurate role in these physiological functions. The focus of this study was on Tnfaip1 expression in different tissues, with a high expression in mouse hippocampus being identified. The age- and gender‑related expression of Tnfaip1 in hippocampus was also investigated. The distribution of Tnfaip1 was mapped using fluorescent immunostaining. Although immunoactivity was found in the CA1, CA3 and DG subregions of the hippocampus in E17.5 and P6 mice, strong staining was only detected in the CA3 subregion in adult mice. These data suggested that Tnfaip1 expression in hippocampus may be regulated by estrogen. Further study showed that the expression of Tnfaip1 in the hippocampus was significantly increased in ovariecto-mized mice compared to Sham mice. In cultured primary hippocampal cells, Tnfaip1 showed different expression levels in different treatments of estrogen or estrogen receptor antagonists. Additional experiments demonstrated the existence of a binding site of ERbeta in the Tnfaip1 promoter region, and that ERbeta was able to upregulate Tnfaip1 expression. Our study identified a new regulatory factor and a primary regulatory mechanism of Tnfaip1 expression in hippocampus. Since both hippocampus and estrogen are crucial in AD, the results also showed a potential association between Tnfaip1 and hippocampal-related diseases, such as AD, which may be affected by the estrogen level. FAU - Liu, Hui AU - Liu H AD - Department of Life Science, Hunan Agricultural University, Changsha, Hunan 410128, P.R. China. FAU - Yang, Liping AU - Yang L AD - Department of Enviromental Science, Changsha Environmental Protection College, Changsha, Hunan 410004, P.R. China. FAU - Zhao, Yingchun AU - Zhao Y AD - Department of Biostatistics and Bioinformatics, Tulane University, New Orleans, LA 70112, USA. FAU - Zeng, Guihua AU - Zeng G AD - Department of Enviromental Science, Changsha Environmental Protection College, Changsha, Hunan 410004, P.R. China. FAU - Wu, Yaosong AU - Wu Y AD - Laboratory of Molecular Biology, Henan University of Traditional Chinese Medicine, Zhengzhou, Henan 410208, P.R. China. FAU - Chen, Yulong AU - Chen Y AD - Laboratory of Molecular Biology, Henan University of Traditional Chinese Medicine, Zhengzhou, Henan 410208, P.R. China. FAU - Zhang, Jian AU - Zhang J AD - Key Laboratory of Protein Chemistry and Developmental Biology, Ministry of Education of China, Department of Biochemistry and Molecular Biology, College of Life Science, Hunan Normal University, Changsha, Hunan 410081, P.R. China. FAU - Zeng, Qingru AU - Zeng Q AD - Department of Life Science, Hunan Agricultural University, Changsha, Hunan 410128, P.R. China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140411 PL - Greece TA - Int J Mol Med JT - International journal of molecular medicine JID - 9810955 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Estrogen Receptor beta) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Proteins) RN - 0 (Tnfaip1 protein, mouse) RN - 22X328QOC4 (Fulvestrant) RN - 4TI98Z838E (Estradiol) SB - IM MH - Adaptor Proteins, Signal Transducing MH - Administration, Oral MH - Age Factors MH - Animals MH - Embryo, Mammalian MH - Estradiol/analogs & derivatives/metabolism/*pharmacology MH - Estrogen Receptor beta/antagonists & inhibitors/*genetics/metabolism MH - Female MH - Fulvestrant MH - *Gene Expression Regulation, Developmental MH - Hippocampus/cytology/*drug effects/growth & development/metabolism MH - Intracellular Signaling Peptides and Proteins MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Neurons/cytology/*drug effects/metabolism MH - Ovariectomy MH - Primary Cell Culture MH - Promoter Regions, Genetic MH - Proteins/*genetics/metabolism MH - Sex Factors MH - Signal Transduction EDAT- 2014/04/17 06:00 MHDA- 2014/12/31 06:00 CRDT- 2014/04/17 06:00 PHST- 2013/11/02 00:00 [received] PHST- 2014/02/26 00:00 [accepted] PHST- 2014/04/17 06:00 [entrez] PHST- 2014/04/17 06:00 [pubmed] PHST- 2014/12/31 06:00 [medline] AID - 10.3892/ijmm.2014.1742 [doi] PST - ppublish SO - Int J Mol Med. 2014 Jul;34(1):219-27. doi: 10.3892/ijmm.2014.1742. Epub 2014 Apr 11.