Co-suppresion of endogenous Hdc expression by the heterologous transgene, pHdc-eGFP, in Drosophila melanogaster

Presentation Type

Poster/Portfolio

Presenter Major(s)

Biomedical Sciences

Mentor Information

Martin Burg, burgm@gvsu.edu

Department

Biomedical Sciences

Location

Henry Hall Atrium 89

Start Date

13-4-2011 10:00 AM

End Date

13-4-2011 11:00 AM

Keywords

Life Science

Abstract

The Hdc gene encodes the enzyme Histidine decarboxylase, which is responsible for histamine synthesis. Previous work has identified a region of the Hdc gene that induces expression in histaminergic neurons. Using a pHdc-eGFP transgene, which induces the expression of eGFP in histaminergic neurons, immunocytochemical analysis of larval brain tissue in pHdc-eGFP bearing flies has indicated that four copies of this pHdc-eGFP transgene induces a loss of histamine immunoreactivity in otherwise normal flies. Transpositions of the original pHdc-eGFP transgenes were performed to determine whether differently positioned pHdc-eGFP transgenes can still cause this co-suppression effect on Hdc expression. Histamine immunocytochemistry will be conducted on the newly generated 4-copy flies to confirm whether the suppression of Hdc is due to the specific location of the pHdc-eGFP transgene or due to the number of transgene copies in the Drosophila genome.

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Apr 13th, 10:00 AM Apr 13th, 11:00 AM

Co-suppresion of endogenous Hdc expression by the heterologous transgene, pHdc-eGFP, in Drosophila melanogaster

Henry Hall Atrium 89

The Hdc gene encodes the enzyme Histidine decarboxylase, which is responsible for histamine synthesis. Previous work has identified a region of the Hdc gene that induces expression in histaminergic neurons. Using a pHdc-eGFP transgene, which induces the expression of eGFP in histaminergic neurons, immunocytochemical analysis of larval brain tissue in pHdc-eGFP bearing flies has indicated that four copies of this pHdc-eGFP transgene induces a loss of histamine immunoreactivity in otherwise normal flies. Transpositions of the original pHdc-eGFP transgenes were performed to determine whether differently positioned pHdc-eGFP transgenes can still cause this co-suppression effect on Hdc expression. Histamine immunocytochemistry will be conducted on the newly generated 4-copy flies to confirm whether the suppression of Hdc is due to the specific location of the pHdc-eGFP transgene or due to the number of transgene copies in the Drosophila genome.