Abstract

The length of the renal papilla determines urinary concentrating capacity. Angiotensin II (A II) may play a role in development and maintenance of the papilla, as suggested by the papillary atresia found in knockout mice lacking A II. the pathogenesis of this papillary atresia is not understood. It has not been reproduced by disruption of either AT1A [Agtr1A] or AT2 A II receptor genes on mixed genetic backgrounds, although Agtr1A (-/-) mice have a concentrating defect. AT1A deficient mice with a >97% C57 BL/6 genetic background [B6Agtr1A (-/)] have a concentrating defect at 4 months of age, and develop papillary atresia by 8 months. Exclusion of subtle papillary abnormalities in Agtr1A (-/-) mice, and examination of the time course of the papillary changes to B6Agtr1A (-/-) has been difficult using standard methods. We propose to use MRM to better visualize the renal papillary in these mouse models

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
3P41RR005959-09S1
Application #
6122323
Study Section
Project Start
1999-02-01
Project End
1999-08-31
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
9
Fiscal Year
1999
Total Cost
Indirect Cost

  Institution

Name
Duke University
Department
Type
DUNS #
071723621
City
Durham
State
NC
Country
United States
Zip Code
27705

  Publications

Tang, Xinyan; Jing, Liufang; Richardson, William J et al. (2016) Identifying molecular phenotype of nucleus pulposus cells in human intervertebral disc with aging and degeneration. J Orthop Res 34:1316-26
Hodgkinson, Conrad P; Bareja, Akshay; Gomez, José A et al. (2016) Emerging Concepts in Paracrine Mechanisms in Regenerative Cardiovascular Medicine and Biology. Circ Res 118:95-107
Roos, Justus E; McAdams, Holman P; Kaushik, S Sivaram et al. (2015) Hyperpolarized Gas MR Imaging: Technique and Applications. Magn Reson Imaging Clin N Am 23:217-29
He, Mu; Robertson, Scott H; Kaushik, S Sivaram et al. (2015) Dose and pulse sequence considerations for hyperpolarized (129)Xe ventilation MRI. Magn Reson Imaging 33:877-85
Schmeckpeper, Jeffrey; Verma, Amanda; Yin, Lucy et al. (2015) Inhibition of Wnt6 by Sfrp2 regulates adult cardiac progenitor cell differentiation by differential modulation of Wnt pathways. J Mol Cell Cardiol 85:215-25
Huang, Lingling; Walter, Vonn; Hayes, D Neil et al. (2014) Hedgehog-GLI signaling inhibition suppresses tumor growth in squamous lung cancer. Clin Cancer Res 20:1566-75
Huang, Jing; Guo, Jian; Beigi, Farideh et al. (2014) HASF is a stem cell paracrine factor that activates PKC epsilon mediated cytoprotection. J Mol Cell Cardiol 66:157-64
Yuan, Ying; Gilmore, John H; Geng, Xiujuan et al. (2014) FMEM: functional mixed effects modeling for the analysis of longitudinal white matter Tract data. Neuroimage 84:753-64
He, Mu; Kaushik, S Sivaram; Robertson, Scott H et al. (2014) Extending semiautomatic ventilation defect analysis for hyperpolarized (129)Xe ventilation MRI. Acad Radiol 21:1530-41
van Rhoon, Gerard C; Samaras, Theodoros; Yarmolenko, Pavel S et al. (2013) CEM43°C thermal dose thresholds: a potential guide for magnetic resonance radiofrequency exposure levels? Eur Radiol 23:2215-27

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