Mechanisms underlying normal human retinal development and dystrophies are still not fully understood, despite the fact that more than half of Americans who become blind each year are diagnosed with some genetic defect. Elucidation of events in normal retinal development may allow us to understand the basis of dystrophies and their better management. Most of the information available on human retinal development emanates from avian of rodent models and few human studies are limited to tumor cell lines. No long term studies are currently possible due to limited sampling of progenitors and senescence that ensues in primary cultures. We propose an alternative strategy that will enable us to perform long term studies. The objective of this proposal is to establish age-restricted cell lines from developing (4, 8, 12 months fetal) human retinal tissues by SV-40T gene transfection and elucidate events in nearly retinal development in homogenous cell populations. We have already established a retinal cell line (Dutt et al 1994, 1996). It is accepted that retinal cells are multi- potential but is this capacity age dependent? The key questions we propose to ask: a) are the factors that determine cell fate intrinsic to progenitors and change developmentally, b) are cellular and molecular changes in micro environment of progenitors specific for cell fate decisions? We propose to test the hypothesis that cell lines generated from different ages will be developmentally restricted and will vary in their ability to generate different combinations of cells either due to 1) changes in endogenous signals (lineages), 2) changes in exogenous signals, or 3) changed ability of the progenitors to respond to signals (interaction between exogenous and endogenous cues). In this study, using cellular and molecular approaches, we will determine the role of lineages versus extracellular signals in retinal development. We propose to accomplish the following aims: 1) Establish age restricted cell lines from human developing retina by SV-40T gene transfection. 2) Determine cell lineages in progenitors from different ages to determine the role played by endogenous signals. 3) Determine the role of endogenous and exogenous signals and how they interact in cell fate determination.

Project Start
1999-08-01
Project End
2000-07-31
Budget Start
1997-10-01
Budget End
1998-09-30
Support Year
13
Fiscal Year
1999
Total Cost
Indirect Cost
Name
Morehouse School of Medicine
Department
Type
DUNS #
City
Atlanta
State
GA
Country
United States
Zip Code
30310
Wilson, Nana O; Solomon, Wesley; Anderson, Leonard et al. (2013) Pharmacologic inhibition of CXCL10 in combination with anti-malarial therapy eliminates mortality associated with murine model of cerebral malaria. PLoS One 8:e60898
Igietseme, Joseph U; Omosun, Yusuf; Partin, James et al. (2013) Prevention of Chlamydia-induced infertility by inhibition of local caspase activity. J Infect Dis 207:1095-104
Wilson, Nana; Driss, Adel; Solomon, Wesley et al. (2013) CXCL10 gene promoter polymorphism -1447A>G correlates with plasma CXCL10 levels and is associated with male susceptibility to cerebral malaria. PLoS One 8:e81329
Kim, Teayoun; Zhelyabovska, Olga; Liu, Jian et al. (2013) Generation of an inducible, cardiomyocyte-specific transgenic mouse model with PPAR ?/? overexpression. Methods Mol Biol 952:57-65
Shelton, Martin N; Huang, Ming-Bo; Ali, Syed A et al. (2012) Secretion modification region-derived peptide disrupts HIV-1 Nef's interaction with mortalin and blocks virus and Nef exosome release. J Virol 86:406-19
Campbell, Patrick E; Isayev, Olexandr; Ali, Syed A et al. (2012) Validation of a novel secretion modification region (SMR) of HIV-1 Nef using cohort sequence analysis and molecular modeling. J Mol Model 18:4603-13
Liu, Mingli; Amodu, Audu S; Pitts, Sidney et al. (2012) Heme mediated STAT3 activation in severe malaria. PLoS One 7:e34280
Wilson, Nana O; Ceesay, Fatou K; Hibbert, Jacqueline M et al. (2012) Pregnancy outcomes among patients with sickle cell disease at Korle-Bu Teaching Hospital, Accra, Ghana: retrospective cohort study. Am J Trop Med Hyg 86:936-42
Wilson, Nana O; Ceesay, Fatou K; Obed, Samuel A et al. (2011) Intermittent preventive treatment with sulfadoxine-pyrimethamine against malaria and anemia in pregnant women. Am J Trop Med Hyg 85:12-21
Lucchi, Naomi W; Jain, Vidhan; Wilson, Nana O et al. (2011) Potential serological biomarkers of cerebral malaria. Dis Markers 31:327-35

Showing the most recent 10 out of 122 publications