scholarly journals Programmed Cell Death Mechanisms and Pheocromocytomas: Recent Advances in PC12 Cells

10.5772/26313 ◽  
2011 ◽  
Author(s):  
Davide Cervia ◽  
Cristiana Perrott
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Pc12 Cells ◽  
Recent Advances ◽  
Cell Death Mechanisms

scholarly journals Nerve growth factor withdrawal-induced cell death in neuronal PC12 cells resembles that in sympathetic neurons.

1992 ◽  
Vol 119 (6) ◽  
pp. 1669-1680 ◽  
Author(s):  
P W Mesner ◽  
T R Winters ◽  
S H Green
Keyword(s):  
Cell Death ◽  
Protein Synthesis ◽  
Nerve Growth Factor ◽  
Growth Factor ◽  
Programmed Cell Death ◽  
Pc12 Cells ◽  
Sympathetic Neurons ◽  
Nerve Growth ◽  
Neuronal Pc12 Cells ◽  
New Protein

Previous studies have shown that in neuronal cells the developmental phenomenon of programmed cell death is an active process, requiring synthesis of both RNA and protein. This presumably reflects a requirement for novel gene products to effect cell death. It is shown here that the death of nerve growth factor-deprived neuronal PC12 cells occurs at the same rate as that of rat sympathetic neurons and, like rat sympathetic neurons, involves new transcription and translation. In nerve growth factor-deprived neuronal PC12 cells, a decline in metabolic activity, assessed by uptake of [3H]2-deoxyglucose, precedes the decline in cell number, assessed by counts of trypan blue-excluding cells. Both declines are prevented by actinomycin D and anisomycin. In contrast, the death of nonneuronal (chromaffin-like) PC12 cells is not inhibited by transcription or translation inhibitors and thus does not require new protein synthesis. DNA fragmentation by internucleosomal cleavage does not appear to be a consistent or significant aspect of cell death in sympathetic neurons, neuronal PC12 cells, or nonneuronal PC12 cells, notwithstanding that the putative nuclease inhibitor aurintricarboxylic acid protects sympathetic neurons, as well as neuronal and nonneuronal PC12 cells, from death induced by trophic factor removal. Both phenotypic classes of PC12 cells respond to aurintricarboxylic acid with similar dose-response characteristics. Our results indicate that programmed cell death in neuronal PC12 cells, but not in nonneuronal PC12 cells, resembles programmed cell death in sympathetic neurons in significant mechanistic aspects: time course, role of new protein synthesis, and lack of a significant degree of DNA fragmentation.

scholarly journals EXPERIMENTAL MODELING OF APOPTOSIS UNDER CONDITIONS OF STABLE STRONTIUM EXPOSURE

2019 ◽  
Vol 21 (1) ◽  
pp. 137-140
Author(s):  
O. V. Dolgikh ◽  
N. V. Zaitseva ◽  
D. G. Dianova ◽  
A. V. Krivtsov ◽  
K. D. Starkova ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Cell Death ◽  
Programmed Cell Death ◽  
Annexin V ◽  
Fold Increase ◽  
Apoptosis Markers ◽  
Stable Strontium ◽  
Cell Death Mechanisms ◽  
Apoptotic Pathways ◽  
And Control

Apoptosis is defined as a highly regulated form of programmed cell death with typical morphological and biochemical features. A variety of factors, including heavy metals, may influence the intensity of programmed cell death. The aim of the work was to simulate apoptosis in an in vitrosystem under the conditions of stable strontium exposure. The children’s population consuming drinking water with high strontium (Sr2+) content (n = 49) was observed. The level of lymphocyte apoptosis was determined with flow cytometry technique, by means of labeled annexin V-FITC conjugate (AnnV-FITC) and propidium iodide (PI) staining. AnnV-FITC+PI- cells were regarded as early apoptotic forms, whereas late apoptotic and/or necrotic cells were AnnV-FITC+PI+. The isolated leukocytes were incubated with Sr2+ at a concentration of 7.0 mg/l, the maximal permitted concentration (MPC) for water of aqueous objects, for 4 hours at 37 ºC. Expression of CD95 and p53 apoptosis markers was performed by flow cytometry using labeled monoclonal antibodies.In vitroexposure to strontium was associated with significantly decreased expression of apoptosisregulating factors, i.e., membrane marker CD95 and intracellular transcription protein p53, 1.56- and 1.68-fold, respectively. Meanwhile, we revealed a significantly (4.68-fold) decreased amounts of AnnV-FITC+PI--cells, as well as a statistically significant (1.35-fold) increase of the AnnV-FITC+PI+-cells. Moreover, the amounts of AnnV-FITC+ PI--lymphocytes in all samples were below the physiological ranges and control values. The number of samples with higher contents of AnnV-FITC+PI+-lymphocyte exceeding the established standards and control values, was 30.8%. Thus, it has been experimentally proven that strontium, at a concentration corresponding to MPC for water objects may significantly inhibit cell death along apoptotic pathways, with switching to necrotic cell death mechanisms, according to phosphatidylserine contents, as detected by annexin V binding test. The data have revealed an ability of strontium to have a significant effect upon the parameters of regulation and maintenance of cellular homeostasis, by influencing the apoptosis intensity, due to shifting a balance towards necrosis and reducing expression of apoptosis-regulating factors. The results of this study may be used in order to identify some marker indexes of immune disorders potentially induced by external influence of strontium upon human health under specific environmental factors.

Induction of Bip mRNA upon Programmed Cell Death of Differentiated PC12 Cells as Well as Rat Sympathetic Neurons

1997 ◽  
Vol 121 (1) ◽  
pp. 122-127 ◽  
Author(s):  
T. Aoki ◽  
T. Koike ◽  
T. Nakano ◽  
K. Shibahara ◽  
S. Kondo ◽  
...  
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Pc12 Cells ◽  
Sympathetic Neurons ◽  
Differentiated Pc12 Cells

Programmed cell death in periodontitis: recent advances and future perspectives

Oral Diseases ◽  
2016 ◽  
Vol 23 (5) ◽  
pp. 609-619 ◽  
Author(s):  
B Song ◽  
T Zhou ◽  
WL Yang ◽  
J Liu ◽  
LQ Shao
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Future Perspectives ◽  
Recent Advances

scholarly journals Cell Death: Mechanisms and Pathways in Cancer Cells

2018 ◽  
Vol 1 (1) ◽  
pp. 12-23
Author(s):  
Diego Fernández-Lázaro ◽  
◽  
César Ignacio Fernández-Lázaro ◽  
Martínez Alfredo Córdova ◽  
◽  
...  
Keyword(s):  
Cell Death ◽  
Programmed Cell Death ◽  
Cancer Cells ◽  
Biological Process ◽  
Morphological Characteristics ◽  
The Body ◽  
Frequent Form ◽  
Different Types ◽  
Cell Death Mechanisms

Programmed cell death is an essential physiological and biological process for the proper development and functioning of the organism. Apoptosis is the term that describes the most frequent form of programmed cell death and derives from the morphological characteristics of this type of death caused by cellular suicide. Apoptosis is highly regulated to maintain homeostasis in the body, since its imbalances by increasing and decreasing lead to different types of diseases. In this review, we aim to describe the mechanisms of cell death and the pathways through apoptosis is initiated, transmitted, regulated, and executed.

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