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In our recent observation, neonatal exposure to estradiol-17\u03b2 (E2) in the female rat revealed increase in cyclooxygenase 2 (COX-2) level, sexually dimorphic nucleus (SDN)-pre-optic area (POA) size and down-regulation of synaptogenesis related genes in POA in the adult stage. In the present study, using the same animal model, the protein profile of control and neonatally E2-treated POA was compared by 1D-SDS-PAGE, and the protein that shows a change in abundance was identified by LC-MS\/MS analysis. Results indicated that there was a single protein band, which was down-regulation in E2-treated POA and it was identified as spectrin alpha chain, non-erythrocytic 1 (SPTAN1). Consistently, the down-regulation of SPTAN1 expression was also confirmed by reverse transcription polymerase chain reaction (RT-PCR) and Western blot analysis. The SPTAN1 was identified as a cytoskeletal protein that is involved in stabilization of the plasma membrane and organizes intracellular organelles, and it has been implicated in cellular functions including DNA repair and cell cycle regulation. The evidence shows that any mutation in spectrins causes impairment of synaptogenesis and other neurological disorders. Also, protein-protein interaction analysis of SPTAN1 revealed a strong association with proteins such as kirrel, actinin, alpha 4 (ACTN4) and vinculin (VCL) which are implicated in sexual behavior, masculinization and defeminization. Our results indicate that SPTAN1 expression in the developing rat brain is sexually dimorphic, and we suggest that this gene may mediate E2-17\u03b2-induced masculinization and defeminization, and disrupted reproductive function in the adult stage.<\/jats:p>","DOI":"10.1515\/hmbci-2016-0008","type":"journal-article","created":{"date-parts":[[2016,5,11]],"date-time":"2016-05-11T06:02:43Z","timestamp":1462946563000},"page":"165-172","source":"Crossref","is-referenced-by-count":5,"title":["Proteomic identification of non-erythrocytic alpha-spectrin-1 down-regulation in the pre-optic area of neonatally estradiol-17\u03b2 treated female adult rats"],"prefix":"10.1515","volume":"26","author":[{"given":"Vijayakumar","family":"Govindaraj","sequence":"first","affiliation":[{"name":"Department of Biochemistry , Indian Institute of Science , Bangalore \u2013 560012, India, Phone: +91-80-22932308,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Addicam Jagannadha","family":"Rao","sequence":"additional","affiliation":[{"name":"Department of Biochemistry , Indian Institute of Science , Bangalore, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"374","published-online":{"date-parts":[[2016,5,11]]},"reference":[{"key":"2025121207153421422_j_hmbci-2016-0008_ref_001_w2aab3b8c11b1b7b1ab2b2b1Aa","doi-asserted-by":"crossref","unstructured":"McCarthy MM, Nugent BM. 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