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Powell R, Bubenshchikova E, Fukuyo Y, Hsu C, Lakiza O, Nomura H, Renfrew E, Garrity D, Obara T. Wtip is required for proepicardial organ specification and cardiac left/right asymmetry in zebrafish. Mol Med Rep 2016; 14:2665-78. [PMID: 27484451 PMCID: PMC4991684 DOI: 10.3892/mmr.2016.5550] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 06/02/2016] [Indexed: 01/20/2023] Open
Abstract
Wilm's tumor 1 interacting protein (Wtip) was identified as an interacting partner of Wilm's tumor protein (WT1) in a yeast two-hybrid screen. WT1 is expressed in the proepicardial organ (PE) of the heart, and mouse and zebrafish wt1 knockout models appear to lack the PE. Wtip's role in the heart remains unexplored. In the present study, we demonstrate that wtip expression is identical in wt1a-, tcf21-, and tbx18-positive PE cells, and that Wtip protein localizes to the basal body of PE cells. We present the first genetic evidence that Wtip signaling in conjunction with WT1 is essential for PE specification in the zebrafish heart. By overexpressing wtip mRNA, we observed ectopic expression of PE markers in the cardiac and pharyngeal arch regions. Furthermore, wtip knockdown embryos showed perturbed cardiac looping and lacked the atrioventricular (AV) boundary. However, the chamber-specific markers amhc and vmhc were unaffected. Interestingly, knockdown of wtip disrupts early left-right (LR) asymmetry. Our studies uncover new roles for Wtip regulating PE cell specification and early LR asymmetry, and suggest that the PE may exert non-autonomous effects on heart looping and AV morphogenesis. The presence of cilia in the PE, and localization of Wtip in the basal body of ciliated cells, raises the possibility of cilia-mediated PE signaling in the embryonic heart.
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Affiliation(s)
- Rebecca Powell
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Ekaterina Bubenshchikova
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Yayoi Fukuyo
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Chaonan Hsu
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Olga Lakiza
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Hiroki Nomura
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
| | - Erin Renfrew
- Department of Biology, Colorado State University, Fort Collins, CO 80523, USA
| | - Deborah Garrity
- Department of Biology, Colorado State University, Fort Collins, CO 80523, USA
| | - Tomoko Obara
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma, OK 73104, USA
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Svensson LG, Blackstone EH, Rajeswaran J, Brozzi N, Leon MB, Smith CR, Mack M, Miller DC, Moses JW, Tuzcu EM, Webb JG, Kapadia S, Fontana GP, Makkar RR, Brown DL, Block PC, Guyton RA, Thourani VH, Pichard AD, Bavaria JE, Herrmann HC, Williams MR, Babaliaros V, Généreux P, Akin JJ. Comprehensive Analysis of Mortality Among Patients Undergoing TAVR. J Am Coll Cardiol 2014; 64:158-68. [DOI: 10.1016/j.jacc.2013.08.1666] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 07/30/2013] [Accepted: 08/12/2013] [Indexed: 11/30/2022]
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Svensson LG, Adams DH, Bonow RO, Kouchoukos NT, Miller DC, O'Gara PT, Shahian DM, Schaff HV, Akins CW, Bavaria JE, Blackstone EH, David TE, Desai ND, Dewey TM, D'Agostino RS, Gleason TG, Harrington KB, Kodali S, Kapadia S, Leon MB, Lima B, Lytle BW, Mack MJ, Reardon M, Reece TB, Reiss GR, Roselli EE, Smith CR, Thourani VH, Tuzcu EM, Webb J, Williams MR. Aortic Valve and Ascending Aorta Guidelines for Management and Quality Measures. Ann Thorac Surg 2013; 95:S1-66. [DOI: 10.1016/j.athoracsur.2013.01.083] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Revised: 12/24/2012] [Accepted: 01/15/2013] [Indexed: 12/31/2022]
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