We have obtained well-labeled monkey fetuses using intravenous injections of 3H thymidine (3HT) into the pregnant female on a known day of gestation. Retinal sections have been double-labeled for cell birthdate (3HT autoradiography) and cell markers (immunocytochemistry). Currently three series are being collected at Fd45, Fd55 and Fd72, with 4-5 fetuses in each series. This material will provide an invaluable resource for the analysis of retinal growth and for determining the sequence of cell generation and differentiation within subpopulations of retinal neurons. An analysis of double-labeled dopamine amacrine cells has shown that these large cells are born somewhere in the middle of the amacrine types. They are never heavily labeled for 3HT, which would show that they are the first to be generated; the first amacrine cells to be generated are large amacrines which contain the neurotransmitter GABA. However, dopamine amacrines are significantly more labeled than other amacrines, putting them in the middle of the cascade of amacrine generation.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
5P51RR000166-38
Application #
6116309
Study Section
Project Start
1999-05-01
Project End
2000-04-30
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
38
Fiscal Year
1999
Total Cost
Indirect Cost
Name
University of Washington
Department
Type
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195
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