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Abstract

Regulation of delta FosB and FosB-like proteins by electroconvulsive seizure and cocaine treatments.

J Chen, H E Nye, M B Kelz, N Hiroi, Y Nakabeppu, B T Hope and E J Nestler
Molecular Pharmacology November 1995, 48 (5) 880-889;
J Chen
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H E Nye
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M B Kelz
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N Hiroi
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Y Nakabeppu
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B T Hope
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E J Nestler
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Abstract

Previous work has shown that c-Fos and several Fos-like proteins or Fras (Fos-related antigens) are induced acutely in brain in response to a wide variety of stimuli. In contrast, several stimuli induce apparently distinct Fos-like proteins, termed chronic Fras, after chronic administration. We show that delta FosB, a truncated splice variant of FosB, responds like the other acute Fras: it is induced rapidly and transiently in cerebral cortex after acute electroconvulsive seizure (ECS) and in striatum after acute cocaine but does not accumulate after chronic ECS or cocaine treatment. Although the chronic Fras are immunochemically related to delta FosB, they can be distinguished from delta FosB based on their temporal properties in that they are induced after chronic ECS and cocaine treatments only. Moreover, the chronic Fras and delta FosB can be distinguished by their migration patterns on one- and two-dimensional gel electrophoresis. The chronic Fras, therefore, appear to be novel FosB-related proteins. We also provide evidence that the chronic Fras heterodimerize primarily with Jun-D and Jun-B, as opposed to c-Jun. The possibility that AP-1 complexes containing the chronic Fras function as negative regulators of AP-1 mediated transcription is discussed.

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Molecular Pharmacology
Vol. 48, Issue 5
1 Nov 1995
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Abstract

Regulation of delta FosB and FosB-like proteins by electroconvulsive seizure and cocaine treatments.

J Chen, H E Nye, M B Kelz, N Hiroi, Y Nakabeppu, B T Hope and E J Nestler
Molecular Pharmacology November 1, 1995, 48 (5) 880-889;

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Abstract

Regulation of delta FosB and FosB-like proteins by electroconvulsive seizure and cocaine treatments.

J Chen, H E Nye, M B Kelz, N Hiroi, Y Nakabeppu, B T Hope and E J Nestler
Molecular Pharmacology November 1, 1995, 48 (5) 880-889;
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