During the midgestation of mammalian embryonic development (E9.5-E15.5), the newly formed embryonic heart is required to grow rapidly in cell number and size and undergoes a series of morphological and functional changes in response to the increasing volume of circulating blood. The proliferating cardiomyocytes form a distinct loose interwoven meshwork of myocardial fibers, the so-called ventricular trabeculae, in E9.5 ventricular chambers. By E14.5, these trabecular structures become more compact toward the epicardial surface, and the intertrabecular recesses are reduced to capillaries. The significant reduction of trabeculation is closely associated with the myocardium growth arrest that leads to an early embryonic lethality. On the other hand, the abnormal enhancement of growth activity of myocardium leads to the failure of myocardial compaction, which is likely the cause of a severe pediatric cardiac disease, Noncompaction of the Ventricular Myocardium, in humans. However, there is little known about the underlying molecular and cellular mechanism. Recently, we found that a member of transforming growth factor beta superfamily, Bone Morphogenetic Protein-10 (BMP10), may be a novel peptide growth factor involved in the cardiac ventricular trabeculation and compaction during the midgestation stages. This proposal is designed to test our hypothesis that BMP-l0 is critical to the cardiac growth and ventricular trabeculation-compaction using both in vitro and in vivo analyses. We propose to: 1) Assess the role of BMP-10 in enhancing embryonic cardiomyocyte proliferation using two cardiomyocyte growth assays in vitro; 2) Determine the BMP-10 dependency of cardiomyocyte proliferation; 3) Analyze the role of BMP-10 in cardiac development by generating BMP-10- deficient mice; 4) Further define the role of BMP-10 using a transgenic approach. We believe that our effort will shed light on further understanding of cardiac development and some forms of congenital cardiac defects.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL070259-02
Application #
6623300
Study Section
Cardiovascular and Pulmonary Research A Study Section (CVA)
Program Officer
Schramm, Charlene A
Project Start
2002-04-01
Project End
2006-03-31
Budget Start
2003-04-01
Budget End
2004-03-31
Support Year
2
Fiscal Year
2003
Total Cost
$335,250
Indirect Cost
Name
Indiana University-Purdue University at Indianapolis
Department
Pediatrics
Type
Schools of Medicine
DUNS #
603007902
City
Indianapolis
State
IN
Country
United States
Zip Code
46202
Liu, Ying; Chen, Hanying; Shou, Weinian (2018) Potential Common Pathogenic Pathways for the Left Ventricular Noncompaction Cardiomyopathy (LVNC). Pediatr Cardiol 39:1099-1106
Zhang, Wenjun; Chen, Hanying; Qu, Xiuxia et al. (2013) Molecular mechanism of ventricular trabeculation/compaction and the pathogenesis of the left ventricular noncompaction cardiomyopathy (LVNC). Am J Med Genet C Semin Med Genet 163C:144-56
Li, Deqiang; Zhang, Wenjun; Liu, Ying et al. (2012) Lack of plakoglobin in epidermis leads to keratoderma. J Biol Chem 287:10435-43
Li, Deqiang; Hallett, Mark A; Zhu, Wuqiang et al. (2011) Dishevelled-associated activator of morphogenesis 1 (Daam1) is required for heart morphogenesis. Development 138:303-15
Zhang, Wenjun; Chen, Hanying; Wang, Yong et al. (2011) Tbx20 transcription factor is a downstream mediator for bone morphogenetic protein-10 in regulating cardiac ventricular wall development and function. J Biol Chem 286:36820-9
Maruyama, Mitsunori; Li, Bai-Yan; Chen, Hanying et al. (2011) FKBP12 is a critical regulator of the heart rhythm and the cardiac voltage-gated sodium current in mice. Circ Res 108:1042-52
Chen, Hanying; Zhang, Wenjun; Li, Deqiang et al. (2009) Analysis of ventricular hypertrabeculation and noncompaction using genetically engineered mouse models. Pediatr Cardiol 30:626-34
Chen, Qian; Chen, Hanying; Zheng, Dawei et al. (2009) Smad7 is required for the development and function of the heart. J Biol Chem 284:292-300
Zhang, Wenjun; Chan, Rebecca J; Chen, Hanying et al. (2009) Negative regulation of Stat3 by activating PTPN11 mutants contributes to the pathogenesis of Noonan syndrome and juvenile myelomonocytic leukemia. J Biol Chem 284:22353-63
Li, Yu; Yan, Jingliang; De, Pradip et al. (2007) Rap1a null mice have altered myeloid cell functions suggesting distinct roles for the closely related Rap1a and 1b proteins. J Immunol 179:8322-31

Showing the most recent 10 out of 17 publications