0000000001055373

AUTHOR

Maria Rapp

showing 4 related works from this author

A differential role of CREB phosphorylation in cAMP-inducible gene expression in the rat pineal

2000

In the rat pineal gland cAMP mediates nocturnal induction of the enzyme arylalkylamine N-acetyltransferase (AA-NAT) as well as of transcription factors such as inducible cAMP early repressor (ICER), Fos-related antigen-2 (Fra-2) and JunB. Cyclic AMP stimulates the phosphorylation of the DNA binding protein cAMP response element binding protein (CREB). While cAMP-induced CREB phosphorylation appears to be a prerequisite for AA-NAT and ICER gene expression, it is not known whether CREB phosphorylation accounts for the full cAMP response of the two genes. Furthermore, the significance of CREB phosphorylation in cAMP-activated Fra-2 and JunB transcription is unknown. In the present in vitro stu…

Transcriptional Activationendocrine systemCAMP-Responsive Element ModulatorArylamine N-AcetyltransferaseProto-Oncogene Proteins c-junJUNBBlotting WesternNerve Tissue ProteinsFos-Related Antigen-2CREBPineal GlandGene Expression Regulation EnzymologicCyclic AMP Response Element ModulatorRats Sprague-DawleyOkadaic AcidGene expressionAnimalsRNA MessengerEnzyme InhibitorsPhosphorylationCyclic AMP Response Element-Binding ProteineducationMolecular BiologyTranscription factorRegulation of gene expressioneducation.field_of_studybiologyReverse Transcriptase Polymerase Chain ReactionGeneral NeuroscienceMolecular biologyRatsDNA-Binding ProteinsRepressor ProteinsBucladesinebiology.proteinPhosphorylationNeurology (clinical)CREB1Proto-Oncogene Proteins c-fosSignal TransductionTranscription FactorsDevelopmental BiologyBrain Research
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Serine/Threonine Phosphatase Inhibitors Decrease Adrenergic Arylalkylamine N -Acetyltransferase Induction in the Rat Pineal Gland

2001

Adrenergic regulation of the pineal enzyme serotonin N-acetyltransferase [arylalkylamine N-acetyltransferase (AA-NAT); EC 2.3.1.87] accounts for the circadian rhythm in melatonin formation. In the present study, the role of protein phosphatases in the adrenergic regulation of rat pineal AA-NAT was investigated using specific inhibitors. In cultured pineals, the serine/threonine phosphatase type 1 and type 2A inhibitors okadaic acid and calyculin A significantly decreased adrenergically or cAMP-induced AA-NAT activity, whereas the serine/threonine phosphatase type 2B inhibitor cypermethrin and tyrosine phosphatase inhibitor dephostatin were ineffective. Reverse transcriptase-polymerase chain…

chemistry.chemical_classificationendocrine systemmedicine.medical_specialtyEndocrine and Autonomic SystemsEndocrinology Diabetes and MetabolismfungiPhosphataseAdrenergicProtein tyrosine phosphataseOkadaic acidBiologyMolecular biologySerineCellular and Molecular Neurosciencechemistry.chemical_compoundEndocrinologyEnzymeEndocrinologychemistryInternal medicineArylalkylaminemedicineThreonineJournal of Neuroendocrinology
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Focal Transcriptional Activity of Murine Cytomegalovirus during Latency in the Lungs

1999

ABSTRACT Interstitial pneumonia is a frequent and critical manifestation of human cytomegalovirus (CMV) disease in immunocompromised patients, in particular in recipients of bone marrow transplantation. Previous work in the murine CMV infection model has identified the lungs as a major organ site of CMV latency and recurrence. It was open to question whether the viral genome is transcriptionally silent or active during latency. Transcription could be latency associated and thus be part of the latency phenotype. Alternatively, transcriptional activity could reflect episodes of reactivation. We demonstrate here that transcription of the immediate-early (IE) transcription unit ie1-ie3 selectiv…

Human cytomegalovirusMaleMuromegalovirusTranscription GeneticRNA SplicingImmunologyReplicationBiologyMicrobiologyTransactivationExonMiceMuromegalovirusTranscription (biology)Bone MarrowRecurrenceVirologyVirus latencyGene expressionmedicineAnimalsGeneGenes Immediate-EarlyLungExonsmedicine.diseasebiology.organism_classificationVirologyVirus LatencyInsect ScienceImmunologyDNA ViralFemale
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Circadian rhythm in NO synthase I transcript expression and its photoperiodic regulation in the rat pineal gland.

2001

The photoneural regulation of nitric oxide synthase type I (NOS I) expression in the rat pineal was investigated using semiquantitative RT-PCR. NOS I transcript expression exhibited a daily rhythm with peak values during the night hours. The daily rhythm in NOS I transcript expression persisted under constant dark conditions and was abolished under constant light conditions. The extent of nocturnal NOS I expression was found to be dependent on the photoperiod. It was attenuated under 20 h light and 4 h dark (L:D 20:4) compared with 12 h light and 12 h dark (L:D 12:12). The present findings indicate that, in the rat pineal, NOS I transcript expression exhibits a true circadian rhythm. Furthe…

medicine.medical_specialtyArylamine N-AcetyltransferasePhotoperiodNitric Oxide Synthase Type IBiologyPineal GlandGene Expression Regulation EnzymologicRats Sprague-DawleyTranscription (biology)Internal medicineGene expressionmedicineAnimalsCircadian rhythmRNA MessengerMuridaephotoperiodismRegulation of gene expressionGeneral Neurosciencebiology.organism_classificationCircadian RhythmRatsNitric oxide synthaseEndocrinologybiology.proteinNitric Oxide SynthaseEndocrine glandNeuroreport
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