Induction and quantitation of the RI cAMP-binding protein in clonal mouse neuroblastoma cell lines: evidence that the increase in RI is not linked to neurite outgrowth. 1988

A Y Liu, and Z Lin, and V Kamalakannan, and K Y Chen
Department of Biological Sciences, Rutgers--State University of New Jersey, Piscataway 08855.

This is a study of the regulation of expression of the RI cAMP-binding protein in mouse neuroblastoma cells as it relates to neurotransmitter phenotype and neurite outgrowth. Dibutyryl cAMP was used to promote differentiation of the cholinergic NS-20, the adrenergic N1E-115, the neurotransmitter-inactive N-18, and the neurite-minus N1A-103 mouse neuroblastoma cells. The amount of the RI cAMP-binding protein was quantitated by photoaffinity labeling of the 47,000-dalton RI protein with 8-N3-[32P]cAMP and by Western blot, ELISA, and immunocytochemistry. Our results showed that dibutyryl cAMP induced the RI cAMP-binding protein by three to fivefold in each of the four neuroblastoma cell lines examined. The increased expression of the RI cAMP-binding protein was not linked to neurite outgrowth, a parameter of morphological differentiation in the neuroblastoma cells. Thus, the RI cAMP-binding protein can be induced in the neurite-minus N1A-103 neuroblastoma round cells; further, 8-bromo-cAMP effected neurite outgrowth without inducing the RI cAMP-binding protein in the neurite-positive cell lines. Indirect immunocytochemistry of RI showed a cytoplasmic localization with little evidence of nuclear staining. The increase in RI cAMP-binding protein coincided with an increase in the cAMP-phosphodiesterase and a decrease in cAMP-dependent phosphotransferase activity in the mouse neuroblastoma cells.(ABSTRACT TRUNCATED AT 250 WORDS)

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D009363 Neoplasm Proteins Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or progression of NEOPLASMS. Some neoplasm proteins are tumor antigens (ANTIGENS, NEOPLASM), i.e. they induce an immune reaction to their tumor. Many neoplasm proteins have been characterized and are used as tumor markers (BIOMARKERS, TUMOR) when they are detectable in cells and body fluids as monitors for the presence or growth of tumors. Abnormal expression of ONCOGENE PROTEINS is involved in neoplastic transformation, whereas the loss of expression of TUMOR SUPPRESSOR PROTEINS is involved with the loss of growth control and progression of the neoplasm. Proteins, Neoplasm
D009447 Neuroblastoma A common neoplasm of early childhood arising from neural crest cells in the sympathetic nervous system, and characterized by diverse clinical behavior, ranging from spontaneous remission to rapid metastatic progression and death. This tumor is the most common intraabdominal malignancy of childhood, but it may also arise from thorax, neck, or rarely occur in the central nervous system. Histologic features include uniform round cells with hyperchromatic nuclei arranged in nests and separated by fibrovascular septa. Neuroblastomas may be associated with the opsoclonus-myoclonus syndrome. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2099-2101; Curr Opin Oncol 1998 Jan;10(1):43-51) Neuroblastomas
D002352 Carrier Proteins Proteins that bind or transport specific substances in the blood, within the cell, or across cell membranes. Binding Proteins,Carrier Protein,Transport Protein,Transport Proteins,Binding Protein,Protein, Carrier,Proteins, Carrier
D002373 Cyclic AMP Receptor Protein A transcriptional regulator in prokaryotes which, when activated by binding cyclic AMP, acts at several promoters. Cyclic AMP receptor protein was originally identified as a catabolite gene activator protein. It was subsequently shown to regulate several functions unrelated to catabolism, and to be both a negative and a positive regulator of transcription. Cell surface cyclic AMP receptors are not included (CYCLIC AMP RECEPTORS), nor are the eukaryotic cytoplasmic cyclic AMP receptor proteins, which are the regulatory subunits of CYCLIC AMP-DEPENDENT PROTEIN KINASES. Catabolic Gene Activators,Catabolite Activator Protein,Catabolite Gene Activator Protein,Catabolite Gene Activator Proteins,Activator Protein, Catabolite,Activator Proteins, Catabolite,Activator, Catabolic Gene,Activators, Catabolic Gene,Catabolic Gene Activator,Catabolite Activator Proteins,Catabolite Regulator Protein,Catabolite Regulator Proteins,Cyclic AMP Receptor Proteins,Gene Activator, Catabolic,Gene Activators, Catabolic,Protein, Catabolite Activator,Protein, Catabolite Regulator,Proteins, Catabolite Activator,Proteins, Catabolite Regulator,Regulator Protein, Catabolite,Regulator Proteins, Catabolite,cAMP Receptor Protein,cAMP Receptor Proteins,Protein, cAMP Receptor,Proteins, cAMP Receptor,Receptor Protein, cAMP,Receptor Proteins, cAMP
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D002999 Clone Cells A group of genetically identical cells all descended from a single common ancestral cell by mitosis in eukaryotes or by binary fission in prokaryotes. Clone cells also include populations of recombinant DNA molecules all carrying the same inserted sequence. (From King & Stansfield, Dictionary of Genetics, 4th ed) Clones,Cell, Clone,Cells, Clone,Clone,Clone Cell
D003600 Cytosol Intracellular fluid from the cytoplasm after removal of ORGANELLES and other insoluble cytoplasmic components. Cytosols
D003994 Bucladesine A cyclic nucleotide derivative that mimics the action of endogenous CYCLIC AMP and is capable of permeating the cell membrane. It has vasodilator properties and is used as a cardiac stimulant. (From Merck Index, 11th ed) Dibutyryl Adenosine-3',5'-Monophosphate,Dibutyryl Cyclic AMP,(But)(2) cAMP,Bucladesine, Barium (1:1) Salt,Bucladesine, Disodium Salt,Bucladesine, Monosodium Salt,Bucladesine, Sodium Salt,DBcAMP,Dibutyryl Adenosine 3,5 Monophosphate,N',O'-Dibutyryl-cAMP,N(6),0(2')-Dibutyryl Cyclic AMP,AMP, Dibutyryl Cyclic,Adenosine-3',5'-Monophosphate, Dibutyryl,Cyclic AMP, Dibutyryl,Dibutyryl Adenosine 3',5' Monophosphate,Disodium Salt Bucladesine,Monosodium Salt Bucladesine,N',O' Dibutyryl cAMP,Sodium Salt Bucladesine
D006656 Protamine Kinase An aspect of protein kinase (EC 2.7.1.37) in which serine residues in protamines and histones are phosphorylated in the presence of ATP. Histone Kinase,Kinase, Histone,Kinase, Protamine

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