関: propidium iodide

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/09/22 20:28:14」(JST)

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Propidium iodide (or PI) is an intercalating agent and a fluorescent molecule with a molecular mass of 668.4 Da that can be used to stain cells. When PI is bound to nucleic acids, the fluorescence excitation maximum is 535 nm and the emission maximum is 617 nm. Excitation energy can be supplied with a xenon or mercury-arc lamp or with the 488 line of an argon-ion laser.^[1] Propidium iodide is used as a DNA stain for both flow cytometry, to evaluate cell viability or DNA content in cell cycle analysis,^[2] and microscopy to visualise the nucleus and other DNA containing organelles. It can be used to differentiate necrotic, apoptotic and normal cells.^[3]

Propidium Iodide is the most commonly used dye to quantitatively assess DNA content.^[4]^{[citation needed]}

Propidium iodide (PI) binds to DNA by intercalating between the bases with little or no sequence preference and with a stoichiometry of one dye per 4–5 base pairs of DNA. PI also binds to RNA, necessitating treatment with nucleases to distinguish between RNA and DNA staining.^[5] Once the dye is bound to nucleic acids, its fluorescence is enhanced 20- to 30-fold, the fluorescence excitation maximum is shifted ~30–40 nm to the red and the fluorescence emission maximum is shifted ~15 nm to the blue. Although its molar absorptivity (extinction coefficient) is relatively low, PI exhibits a sufficiently large Stokes shift to allow simultaneous detection of nuclear DNA and fluorescein-labeled antibodies, provided the proper optical filters are used. PI is suitable for fluorescence microscopy, confocal laser scanning microscopy, flow cytometry, and fluorometry.

PI is membrane impermeant and generally excluded from viable cells. PI is commonly used for identifying dead cells in a population and as a counterstain in multicolor fluorescent techniques.^[6] The counterstaining protocols below are compatible with a wide range of cytological labeling techniques—direct or indirect antibody-based detection methods, mRNA in situ hybridization, or staining with fluorescent reagents specific for cellular structures. These protocols can be modified for tissue staining.

A typical use of propidium iodide in plant biology is to stain the cell wall. Especially useful for Arabidopsis thaliana seedling root tissue observed by confocal microscopy, it increases visibility of the outlines of cells in the root tip. This red fluorescent background is useful to determine the sub-localization of a gene of interest expressed as a Green Fluorescent Protein fusion.

Also, propidium iodide is used as a stain in animal cells. For example, in Apodemus sylvaticus, more commonly known as the wood mouse, it can be used to indicate the location of the nuclear region by emitting its characteristic red fluorescence.^[7]

References[edit source | edit]

^ http://probes.invitrogen.com/media/pis/mp01304.pdf
^ http://www.biolegend.com/propidium-iodide-solution-2651.html
^ Lecoeur H (2002). "Nuclear apoptosis detection by flow cytometry: influence of endogenous endonucleases". Exp. Cell Res. 277 (1): 1–14. doi:10.1006/excr.2002.5537. PMID 12061813.
^ Cancer Research UK. 2004. Cell Cycle Analysis - Propidium Iodide. http://science.cancerresearchuk.org/sci/facs/facs_major_apps/cell_cycle_analysis/propidium_iodide/?version=1
^ Suzuki T, Fujikura K, Higashiyama T, Takata K (1 January 1997). "DNA staining for fluorescence and laser confocal microscopy". J. Histochem. Cytochem. 45 (1): 49–53. doi:10.1177/002215549704500107. PMID 9010468.
^ Moore A, Donahue CJ, Bauer KD, Mather JP (1998). "Simultaneous measurement of cell cycle and apoptotic cell death". Methods Cell Biol. 57: 265–78. doi:10.1016/S0091-679X(08)61584-8. PMID 9648110.
^ Moore, Harry et al., Exceptional sperm cooperation in Wood Mouse.Nature 418, 174-177 (2002).

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Salidroside inhibits endogenous hydrogen peroxide induced cytotoxicity of endothelial cells

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… MTT, SOD, MDA, and GSH assays were performed, together with Hoechst 33258 staining and flow cytometric analysis using Annexin-V and propidium (PI) label. …
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… Pristimerin-induced apoptosis was evaluated using Western blotting for caspase-3, -8, -9, and poly (ADP-ribose) polymerase expression and flow cytometric analysis for propidium iodide labeling. …
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Photodynamic Therapy in Combination with Talaporfin Sodium Induces Mitochondrial Apoptotic Cell Death Accompanied with Necrosis in Glioma Cells

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… Specifically, cell death modalities were observed in NPe6-PDT treated T98G cells, including signs of apoptosis (activation of caspase-3, expression of phosphatidylserine, and DNA fragmentation) and necrosis (stainability of propidium iodide). …
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「プロピジウム」

Propidium iodide
Identifiers
CAS number	25535-16-4
PubChem	104981
ChemSpider	94732
ChEBI	CHEBI:51240
ChEMBL	CHEMBL345124
Jmol-3D images	Image 1
	SMILES CC[N+](C)(CC)CCC[n+]1c2cc(ccc2c3ccc(cc3c1c4ccccc4)N)N.[I-].[I-] ;
	InChI InChI=1S/C27H33N4.2HI/c1-4-31(3,5-2)17-9-16-30-26-19-22(29)13-15-24(26)23-14-12-21(28)18-25(23)27(30)20-10-7-6-8-11-20;;/h6-8,10-15,18-19,29H,4-5,9,16-17,28H2,1-3H3;21H/q+1;;/p-1 ; Key: XJMOSONTPMZWPB-UHFFFAOYSA-M InChI=1/C27H33N4.2HI/c1-4-31(3,5-2)17-9-16-30-26-19-22(29)13-15-24(26)23-14-12-21(28)18-25(23)27(30)20-10-7-6-8-11-20;;/h6-8,10-15,18-19,29H,4-5,9,16-17,28H2,1-3H3;21H/q+1;;/p-1; Key: XJMOSONTPMZWPB-REWHXWOFAB ;
Properties
Molecular formula	C27H34I2N4
Molar mass	668.3946
	(verify) (what is: /?); Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
	Infobox references

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英: propidium
関: ヨウ化プロピジウム

[1] ttp://probes.invitrogen.com/media/pis/mp01304.pdf

[2] ttp://www.biolegend.com/propidium-iodide-solution-2651.html

[3] Lecoeur H (2002). "Nuclear apoptosis detection by flow cytometry: influence of endogenous endonucleases". Exp. Cell Res. 277 (1): 1–14. doi:10.1006/excr.2002.5537. PMID 12061813.

[4] Cancer Research UK. 2004. Cell Cycle Analysis - Propidium Iodide. http://science.cancerresearchuk.org/sci/facs/facs_major_apps/cell_cycle_analysis/propidium_iodide/?version=1

[5] Suzuki T, Fujikura K, Higashiyama T, Takata K (1 January 1997). "DNA staining for fluorescence and laser confocal microscopy". J. Histochem. Cytochem. 45 (1): 49–53. doi:10.1177/002215549704500107. PMID 9010468.

[6] Moore A, Donahue CJ, Bauer KD, Mather JP (1998). "Simultaneous measurement of cell cycle and apoptotic cell death". Methods Cell Biol. 57: 265–78. doi:10.1016/S0091-679X(08)61584-8. PMID 9648110.

[7] Moore, Harry et al., Exceptional sperm cooperation in Wood Mouse.Nature 418, 174-177 (2002).

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