This is a revised version of a Program Project renewal, concerned with the developmental biology of the lung. The revised proposal has been altered in response to the reviewers' comments. The theme of the grant, is now and has been the exploration of molecular mechanisms regulating epithelial cell differentiation in the developing lung. The four projects of the original grant have produced 27 manuscripts, most co-authored by several project leaders. Two new faculty with expertise in transgenic and gene knockout technology have been added. The four projects continue themes begun in the initial grant, but are more focused in their hypotheses and goals. Each project examines a distinct mechanism of gene regulation in the developing lung. Project 1 defines the transcriptional regulation and function of a gene, discovered by us. It is the only well-defined marker of the alveolar type 1 cell and is likely a regulator of ion and/or water transport in lung and brain epithelia. Project 2 explores a new hypothesis that the change in oxygen concentration occurring at birth is an important regulator of gene expression in the perinatal lung and defines molecular mechanisms of this regulation. Project 4 examines the relationship between embryonic lung cell proliferation and differentiation, focusing on the pRb family of proteins, an E2F transcription factor we have cloned, and CPB/p300 a new co-activator of gene transcription. Project 5 explores the relation between pattern formation and lung cell differentiation, examining the role that the fibroblast family of growth factors and receptors, Hox genes, and sonic hedgehog play in regulating epithelial-mesenchymal interactions that guide embryonic lung development. While each project deals with a different mechanism of gene regulation, the extensive interactions of the investigators, the shared reagents and experimental systems together with the focus on epithelial cell differentiation, provide a unique opportunity to study interactive aspects of lung cell gene regulation.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Program Projects (P01)
Project #
2P01HL047049-06A1
Application #
2372859
Study Section
Heart, Lung, and Blood Initial Review Group (HLBP)
Project Start
1992-01-21
Project End
2002-06-30
Budget Start
1997-07-01
Budget End
1998-06-30
Support Year
6
Fiscal Year
1997
Total Cost
Indirect Cost
Name
Boston University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
604483045
City
Boston
State
MA
Country
United States
Zip Code
02118
Cushing, Leah; Costinean, Stefan; Xu, Wei et al. (2015) Disruption of miR-29 Leads to Aberrant Differentiation of Smooth Muscle Cells Selectively Associated with Distal Lung Vasculature. PLoS Genet 11:e1005238
Cushing, Leah; Jiang, Zhihua; Kuang, Pingping et al. (2015) The roles of microRNAs and protein components of the microRNA pathway in lung development and diseases. Am J Respir Cell Mol Biol 52:397-408
Mori, Munemasa; Mahoney, John E; Stupnikov, Maria R et al. (2015) Notch3-Jagged signaling controls the pool of undifferentiated airway progenitors. Development 142:258-67
Tagne, Jean-Bosco; Mohtar, Omar R; Campbell, Joshua D et al. (2015) Transcription factor and microRNA interactions in lung cells: an inhibitory link between NK2 homeobox 1, miR-200c and the developmental and oncogenic factors Nfib and Myb. Respir Res 16:22
Guha, Arjun; Vasconcelos, Michelle; Zhao, Rui et al. (2014) Analysis of Notch signaling-dependent gene expression in developing airways reveals diversity of Clara cells. PLoS One 9:e88848
Mahoney, John E; Mori, Munemasa; Szymaniak, Aleksander D et al. (2014) The hippo pathway effector Yap controls patterning and differentiation of airway epithelial progenitors. Dev Cell 30:137-50
Jiang, Zhihua; Cushing, Leah; Ai, Xingbin et al. (2014) miR-326 is downstream of Sonic hedgehog signaling and regulates the expression of Gli2 and smoothened. Am J Respir Cell Mol Biol 51:273-83
Jean, Jyh-Chang; George, Elizabeth; Kaestner, Klaus H et al. (2013) Transcription factor Klf4, induced in the lung by oxygen at birth, regulates perinatal fibroblast and myofibroblast differentiation. PLoS One 8:e54806
Tagne, Jean-Bosco; Gupta, Sumeet; Gower, Adam C et al. (2012) Genome-wide analyses of Nkx2-1 binding to transcriptional target genes uncover novel regulatory patterns conserved in lung development and tumors. PLoS One 7:e29907
Sommer, Cesar A; Christodoulou, Constantina; Gianotti-Sommer, Andreia et al. (2012) Residual expression of reprogramming factors affects the transcriptional program and epigenetic signatures of induced pluripotent stem cells. PLoS One 7:e51711

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