Journal ArticleDOI
Sarcoma viruses carrying ras oncogenes induce differentiation-associated properties in a neuronal cell line
Makoto Noda,Minoru S.H. Ko,Akihiko Ogura,Ding Gan Liu,Takehiko Amano,Toshiya Takano,Yoji Ikawa +6 more
TLDR
It is found that Ki- and Ha-MSV mimic some, if not all, of the activities of NGF in PC12 cells, and there is evidence that the viral oncogenes, v-Ki-ras and v-Ha-ras, are responsible for this phenomenon.Abstract:
The growth-promoting and/or differentiation-blocking activities of Kirsten (Ki-MSV) or Harvey murine sarcoma virus (Ha-MSV) on various types of cells in vitro are well documented. Here we report an unexpected effect of these viruses on a rat phaeochromocytoma cell line, PC12. PC12 cells, which multiply indefinitely in growth medium, are known to respond to nerve growth factor (NGF) by cessation of cell division and expression of several properties resembling those of differentiated sympathetic neurones. We have found that Ki- and Ha-MSV mimic some, if not all, of the activities of NGF in PC12 cells, and there is evidence that the viral oncogenes, v-Ki-ras and v-Ha-ras, are responsible for this phenomenon. This system may be of value for studying the mechanism of action of the v-ras genes as well as the regulatory mechanism of growth and differentiation in neuronal cells.read more
Citations
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Journal Article
ras Oncogenes in Human Cancer: A Review
TL;DR: It appeared that ras gene mutations can be found in a variety of tumor types, although the incidence varies greatly and some evidence that environmental agents may be involved in the induction of the mutations.
Journal ArticleDOI
Specificity of receptor tyrosine kinase signaling: Transient versus sustained extracellular signal-regulated kinase activation
TL;DR: Experiments with PC12 cells suggest that the duration of ERK activation is critical for cell signaling decisions, and the extracellular signal-regulated kinase (ERK-regulated) MAPK pathway may be sufficient for these cellular responses.
Journal ArticleDOI
Small GTP-Binding Proteins
TL;DR: In this review, functions of small G proteins and their modes of activation and action are described.
Journal ArticleDOI
Tumor suppressor genes.
TL;DR: Oncogenes are yielding their place at center stage to a second group of actors, the tumor suppressor genes, which promise to teach us equally important lessons about the molecular mechanisms of cancer pathogenesis.
Journal ArticleDOI
Growth factors and cancer
TL;DR: Signaling pathways that mediate the normal functions of growth factors are commonly subverted in cancer, and oncogenes appear to replace the actions of one set of these growth factors.
References
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Journal ArticleDOI
A new and rapid colorimetric determination of acetylcholinesterase activity.
TL;DR: A photometric method for determining acetylcholinesterase activity of tissue extracts, homogenates, cell suspensions, etc., has been described and Kinetic constants determined by this system for erythrocyte eholinesterases are presented.
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Establishment of a noradrenergic clonal line of rat adrenal pheochromocytoma cells which respond to nerve growth factor.
TL;DR: A single cell clonal line which responds reversibly to nerve growth factor (NGF) has been established from a transplantable rat adrenal pheochromocytoma and should be a useful model system for neurobiological and neurochemical studies.
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In yeast, RAS proteins are controlling elements of adenylate cyclase
T. Toda,Isao Uno,Tatsuo Ishikawa,Scott Powers,Tohru Kataoka,Daniel Broek,Scott J. Cameron,James R. Broach,Kunihiro Matsumoto,Michael Wigler +9 more
TL;DR: S. cerevisiae strains containing RAS2val19, a Ras2 gene with a missense mutation analogous to one that activates the transforming potential of mammalian ras genes, have growth and biochemical properties strikingly similar to yeast strains carrying IAC or bcy1.
Journal ArticleDOI
Nerve growth factor-induced increase in electrical excitability and acetylcholine sensitivity of a rat pheochromocytoma cell line
TL;DR: A cloned line of rat pheochromocytoma cells (PC12) which responds to nerve growth factor by cessation of division and extension of neurone-like processes, is shown to develop electrical excitability and greatly increased acetylcholine sensitivity in the presence of NGF, implying that NGF influences the physiological differentiation of certain neural crest derivatives.
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The Biology and Mechanism of Action of Nerve Growth Factor
Bruce A. Yankner,Eric M. Shooter +1 more
TL;DR: The role of NGF and Neuronal Survival, and the Mechanism of action, are examined in the context of the development of the nervous system.