GSBS Student Publications

Title

Mutually dependent response elements in the cis-regulatory region of the neurotensin/neuromedin N gene integrate environmental stimuli in PC12 cells

GSBS Program

Biochemistry & Molecular Pharmacology

Publication Date

1990-05-01

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Molecular Genetics and Microbiology

Document Type

Article

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

The expression of the gene encoding the neuroendocrine peptides neurotensin (NT) and neuromedin N is strictly dependent on simultaneous exposure to multiple inducers in PC12 pheochromocytoma cells. NT peptide and NT/N mRNA levels are synergistically induced by combinations of NGF, dexamethasone, activators of adenylate cyclase, and lithium ion. We have used transient transfection assays to delineate the rat NT/N gene sequences necessary for this complex regulation. Progressive deletions of the 5' flanking region revealed that sequences between -216 and +56 are sufficient to confer the full spectrum of responses exhibited by the endogenous gene to a reporter gene. Detailed mutational analysis of this region indicates that it is composed of an array of inducible cis-regulatory sequences, including AP-1, cAMP response, and glucocorticoid response elements. Specific mutation of either the AP-1 site or each of two cAMP response elements indicates that they are functionally interdependent. This array of response elements serves to integrate multiple environmental stimuli into a unified transcriptional response.

DOI of Published Version

10.1016/0896-6273(90)90205-T

Source

Neuron. 1990 May;4(5):783-95.

Journal/Book/Conference Title

Neuron

Related Resources

Link to article in PubMed

PubMed ID

2344411

Link to Full Text

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