Alternative splicing transcription of Megalobrama amblycephala HIF prolyl hydroxylase PHD3 and up-regulation of PHD3 by HIF-1α

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• 作者：Nan Chen^a ; ¹ ; Cui-Hong Huang^a ; ¹ ; Bo-Xiang Chen^a ; ^d ; Hong Liu^a ; ^b ; Wei-Min Wang^a ; Yasmeen Gul^c ; Huan-Ling Wang^a ; ^b ; ^{hbauwhl@hotmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Megalobrama amblycephala ; PHD3 ; Alternative splicing transcription ; Hypoxia
• 刊名：Biochemical and Biophysical Research Communications
• 出版年：2016
• 出版时间：15 January 2016
• 年：2016
• 卷：469
• 期：3
• 页码：737-742
• 全文大小：929 K

文摘

PHD3 is a hydroxylase that hydroxylates prolyl residues on hypoxia-inducible factors (HIFs) in mammals. In this study, the full-length cDNA and promoter sequences of Megalobrama amblycephala PHD3 gene were isolated by a modified RACE method. PHD3 cDNA was 1622 bp in length, including an ORF of 717 bp encoding 238 amino acid residues. The semi-quantitative PCR results suggested that PHD3 was highly expressed in liver in the normal condition, while after hypoxia treatment this gene was significantly increased in all analyzed tissues. PHD3 was detected only in the initial stages of M. amblycephala embryo development. In addition, the presence of another alternatively processed PHD3 transcript, designated PHD3Δ1 was observed in the process of analyzing the expression of PHD3. Both PHD3 and PHD3Δ1 were up-regulated under hypoxia, and had five the hypoxia response elements (HREs) by in silico scanning on the promoter. Further luciferase assay indicated that all HREs significantly responded to hypoxia. Taken together, these results suggest that PHD3 plays important roles in hypoxia response and early embryo development of M. amblycephala.