{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T18:22:29Z","timestamp":1770834149420,"version":"3.50.1"},"reference-count":41,"publisher":"The Company of Biologists","license":[{"start":{"date-parts":[[2018,1,1]],"date-time":"2018-01-01T00:00:00Z","timestamp":1514764800000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/www.biologists.com\/user-licence-1-1\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institues of Health","doi-asserted-by":"crossref","award":["HL-110951"],"award-info":[{"award-number":["HL-110951"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>c-Abl tyrosine kinase participates in the regulation of various cellular functions including cell proliferation, adhesion, migration, smooth muscle contraction, and cancer progression. However, knowledge regarding transcriptional regulation of c-Abl is surprisingly limited. Sp1 is a founding member of the Sp1 transcription factor family that has been implicated in housekeeping gene expression, tumor cell proliferation, and differentiation. Here, knockdown and rescue of Sp1 affected growth factor-mediated c-Abl expression in cells. c-Abl promoter activity was also affected by Sp1 knockdown. This is the first evidence to suggest that Sp1 is an important transcription factor to regulate c-Abl expression. In addition, Sp1 phosphorylation at Thr-453 and Thr-739 has been proposed to regulate its activity in drosophila cells. We unexpectedly found that growth factors did not induce Sp1 phosphorylation at these two residues. In contrast, growth factor stimulation upregulated Sp1 expression. Intriguingly, ERK1\/2 inhibition reduced expression of Sp1 and c-Abl. Furthermore, c-Abl knockdown diminished ERK1\/2 phosphorylation and Sp1 expression. Taken together, these studies suggest that Sp1 can modulate c-Abl expression at transcription level. Conversely, c-Abl affects ERK1\/2 activation and Sp1 expression in cells.<\/jats:p>","DOI":"10.1242\/jcs.222380","type":"journal-article","created":{"date-parts":[[2018,12,17]],"date-time":"2018-12-17T15:29:27Z","timestamp":1545060567000},"source":"Crossref","is-referenced-by-count":6,"title":["Specific protein 1, c-Abl, and ERK1\/2 form a regulatory loop"],"prefix":"10.1242","author":[{"given":"Jiaoyue","family":"Long","sequence":"first","affiliation":[{"name":"Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guoning","family":"Liao","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yinna","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7339-9249","authenticated-orcid":false,"given":"Dale D.","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Molecular and Cellular Physiology, Albany Medical College, Albany, New York, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","published-online":{"date-parts":[[2018,1,1]]},"reference":[{"key":"2021042422373785300_JCS222380C1","doi-asserted-by":"publisher","first-page":"37","DOI":"10.1016\/j.mce.2018.04.007","article-title":"Estrogen receptor beta signaling inhibits PDGF induced human airway smooth muscle proliferation","volume":"476","author":"Ambhore","year":"2018","journal-title":"Mol. 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