Protein Information

Name cytochrome c
Synonyms CYC; CYCS; Cytochrome C; HCS; Cytochrome Cs

Compound Information

Name sodium azide
CAS sodium azide

Reference List

PubMed Abstract RScore(About this table)
16951741 Kambayashi Y, Hitomi Y, Kodama N, Kubo M, Okuda J, Takemoto K, Shibamori M, Takigawa T, Ogino K: pH profile of cytochrome c-catalyzed tyrosine nitration. Acta Biochim Pol. 2006;53(3):577-84. Epub 2006 Sep 4.

The cytochromec-catalyzed nitration of tyrosine was inhibited by catalase, sodium azide, cystein, and uric acid.
7(0,0,0,7) Details
16540393 Chen Q, Lesnefsky EJ: Depletion of cardiolipin and cytochrome c during ischemia increases hydrogen peroxide production from the electron transport chain. Free Radic Biol Med. 2006 Mar 15;40(6):976-82. Epub 2005 Nov 8.

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11500038 Das N, Gupta S, Mazumdar S: Direct observation of release of cytochrome c from lipid-encapsulated protein by peroxide and superoxide: a possible mechanism for drug-induced apoptosis. Biochem Biophys Res Commun. 2001 Aug 17;286(2):311-4.

The protein encapsulated inside vesicles did not form complex with sodium azide solution added externally.
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10707086 Goldstein JC, Waterhouse NJ, Juin P, Evan GI, Green DR: The coordinate release of cytochrome c during apoptosis is rapid, complete and kinetically invariant. Nat Cell Biol. 2000 Mar;2(3):156-62.

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7622786 Goyal N, Srivastava VM: Oxidation and reduction of cytochrome c by mitochondrial enzymes of Setaria cervi. J Helminthol. 1995 Mar;69(1):13-7.

Sodium azide activated the reductases but substantially inhibited the oxidase activity.
3(0,0,0,3) Details
14709344 Grammatopoulos TN, Morris K, Bachar C, Moore S, Andres R, Weyhenmeyer JA: Angiotensin II attenuates chemical hypoxia-induced caspase-3 activation in primary cortical neuronal cultures. Brain Res Bull. 2004 Jan 15;62(4):297-303.

In this study we determined whether caspase-3 is required in mouse cortical neurons for sodium azide-mediated apoptosis.
Levels of cytochrome-c release and caspase-3 cleavage were assayed by Western analysis.
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17056004 Mubarakshina M, Khorobrykh S, Ivanov B: Oxygen reduction in chloroplast thylakoids results in production of hydrogen peroxide inside the membrane. Biochim Biophys Acta. 2006 Nov;1757(11):1496-503. Epub 2006 Sep 20.

Hydrogen peroxide production in isolated pea thylakoids was studied in the presence of cytochrome c to prevent disproportionation of superoxide radicals outside of the thylakoid membranes.
Neither the presence of a superoxide dismutase inhibitor, potassium cyanide or sodium azide, in the thylakoid suspension, nor unstacking of the thylakoids appreciably affected the partitioning of electrons to hydrogen peroxide production.
2(0,0,0,2) Details
10597238 Suzuki S, Higuchi M, Proske RJ, Oridate N, Hong WK, Lotan R: Implication of mitochondria-derived reactive oxygen species, cytochrome C and caspase-3 in N-(4-hydroxyphenyl) retinamide-induced apoptosis in cervical carcinoma cells. Oncogene. 1999 Nov 4;18(46):6380-7.

2(0,0,0,2) Details
19349686 Brooks C, Wei Q, Cho SG, Dong Z: Regulation of mitochondrial dynamics in acute kidney injury in cell culture and rodent models. J Clin Invest. 2009 May;119(5):1275-85. doi: 10.1172/JCI37829. Epub 2009 Apr 6.


Following either ATP depletion or cisplatin treatment of rat renal tubular cells, mitochondrial fragmentation was observed prior to cytochrome c release and apoptosis.
1(0,0,0,1) Details
15500948 Ding X, Xu Q, Liu F, Zhou P, Gu Y, Zeng J, An J, Dai W, Li X: Hematoporphyrin monomethyl ether photodynamic damage on HeLa cells by means of reactive oxygen species production and cytosolic free calcium concentration elevation. Cancer Lett. 2004 Dec 8;216(1):43-54.

Sodium azide (the singlet oxygen quencher) or D-mannitol (the hydroxyl radical scavenger) could protect HeLa cells from the apoptosis and necrosis induced by HMME-PDT, showing that reactive oxygen species (ROS), such as singlet oxygen and hydroxyl radical, played a decisive role in HMME-PDT-induced HeLa cells death.
Cytochrome C (Cyto C) release from mitochondria into cytosol and Caspase-3 activation after HMME-PDT were inhibited by BAPTA/AM (an intracellular calcium chelator).
1(0,0,0,1) Details
11193033 Benitez-Bribiesca L, Gomez-Camarillo M, Castellanos-Juarez E, Mravko E, Sanchez-Suarez P: Morphologic, biochemical and molecular mitochondrial changes during reperfusion phase following brief renal ischemia. Ann N Y Acad Sci. 2000;926:165-79.

Ischemia/reperfusion of organs and cells induces apoptosis through a complicated series of changes in mitochondria, mainly the generation of oxygen free radicals, permeability transitions, calcium translocations, and release of apoptogenic factors such as cytochrome c and Bcl-2 family members.
A model of chemical hypoxia with intra-arterial 50 mM sodium azide served as comparison, allowing free blood flow for 30, 60, 120 and 180 min.
1(0,0,0,1) Details
20036216 Hur J, Lee P, Kim MJ, Kim Y, Cho YW: Ischemia-activated microglia induces neuronal injury via activation of gp91phox NADPH oxidase. Biochem Biophys Res Commun. 2010 Jan 15;391(3):1526-30. Epub 2009 Dec 28.


MCM-treated SH-SY5Y cells showed reduced the viability, increased caspase-3 activity, decreased Bcl-2/Bax ratio, and increased cytochrome c release, increased inflammatory cytokines, and increased reactive oxygen species (ROS) generation.
1(0,0,0,1) Details
20203294 Ranzato E, Biffo S, Burlando B: Selective Ascorbate Toxicity to Malignant Mesothelioma: A Redox Trojan Mechanism. Am J Respir Cell Mol Biol. 2010 Mar 4.

Ascorbate transport inhibitors phloretin, sodium azide and ouabain did not reduce ascorbate toxicity .
Mesothelioma cells showed much higher superoxide production (revealed by cytochrome c reduction assay) and NOX4 expression (revealed by Western blot) than mesothelial cells.
1(0,0,0,1) Details
12590362 Ho KJ, Liu TK, Huang TS, Lu FJ: Humic acid mediates iron release from ferritin and promotes lipid peroxidation in vitro: a possible mechanism for humic acid-induced cytotoxicity. Arch Toxicol. 2003 Feb;77(2):100-9. Epub 2002 Dec 17.

In addition, the increase in HA-induced lipid peroxidation is partially inhibited by sodium azide (a singlet oxygen scavenger) or disodium 4,5-dihydroxy-1,3-benzene-disulfonic acid (a superoxide scavenger), reflecting the involvement of singlet oxygen and superoxide in the process of lipid peroxidation.
The addition of HA into a reaction system has been shown to generate superoxide in a dose-dependent manner by the superoxide dismutase-inhibitable cytochrome c reduction assay.
1(0,0,0,1) Details
10408245 Kunimoto S, Nosaka C, Takeuchi T: Stimulation of cellular XTT reduction by cytochrome oxidase inhibitors. . Biol Pharm Bull. 1999 Jun;22(6):660-1.


It is suggested that XTT reduction is coupled with the respiratory chain via cytochrome c, which is located between complexes III and IV (cytochrome oxidase).
1(0,0,0,1) Details
15004018 Wang J, Wei Q, Wang CY, Hill WD, Hess DC, Dong Z: Minocycline up-regulates Bcl-2 and protects against cell death in mitochondria. J Biol Chem. 2004 May 7;279(19):19948-54. Epub 2004 Mar 5.


The protection occurred at mitochondria, involving the suppression of Bax accumulation, outer membrane damage, and cytochrome c release.
1(0,0,0,1) Details
9509413 An SS, Kim YM: Purification and characterization of a manganese-containing superoxide dismutase from a carboxydobacterium, Pseudomonas carboxydohydrogena. Mol Cells. 1997 Dec 31;7(6):730-7.

Sodium azide, but not sodium cyanide and hydrogen peroxide, was found to inhibit the enzyme activity.
The final specific activity was 2,396 units per mg protein as determined by an assay based on a 50% decrease in the rate of cytochrome c reduction.
1(0,0,0,1) Details
8628756 Linetsky M, Ortwerth BJ: Quantitation of the reactive oxygen species generated by the UVA irradiation of ascorbic acid-glycated lens proteins. Photochem Photobiol. 1996 May;63(5):649-55.

High concentrations of sodium azide, a known singlet oxygen quencher, inhibited the photolytic destruction of both His and Trp.
Superoxide anion attained a level of 76 microM as determined by the superoxide dismutase (SOD)-dependent increase in hydrogen peroxide formation and of 52 microM by the SOD-inhibitable reduction of cytochrome c.
1(0,0,0,1) Details
17646712 Seo SN, Lee JH, Kim YM: Characterization of an iron- and manganese-containing superoxide dismutase from Methylobacillus sp. strain SK1 DSM 8269. Mol Cells. 2007 Jun 30;23(3):370-8.

Hydrogen peroxide and sodium azide, but not sodium cyanide, was found to inhibit the purified enzyme.
The final specific activity was 4,831 units per milligram protein as determined by an assay based on a 50% decrease in the rate of cytochrome c reduction.
1(0,0,0,1) Details
17045927 Lu Z, Tao Y, Zhou Z, Zhang J, Li C, Ou L, Zhao B: Mitochondrial reactive oxygen species and nitric oxide-mediated cancer cell apoptosis in 2-butylamino-2-demethoxyhypocrellin B photodynamic treatment. Free Radic Biol Med. 2006 Nov 15;41(10):1590-605. Epub 2006 Aug 30.


It was found that exposure of the cells to 2-BA-2-DMHB and irradiation resulted in a significant increase of intracellular ROS in minutes, and then followed by cytoplasmic free calcium enhancement, mitochondrial nitric oxide synthase (mtNOS) activation, cytochrome c release, and apoptotic death.
1(0,0,0,1) Details
15659779 Chun YS, Yeo EJ, Suh HJ, Park JW: Spontaneous generation of reactive oxygen species in the mixture of cyanide and glycerol. Ann N Y Acad Sci. 2004 Dec;1030:43-51.

However, sucrose and sodium azide in combination do not produce such artifacts and thus may be used as an alternative.
In this study, we demonstrate that a mixture of glycerol and cyanide reduced cytochrome c and nitroblue tetrazolium, both of which are superoxide anion indicators.
1(0,0,0,1) Details
8531024 Tesfa-Selase F, Hay RJ: Superoxide dismutase of Cryptococcus neoformans: purification and characterization. J Med Vet Mycol. 1995 Jul-Aug;33(4):253-9.

Superoxide dismutase activity was also assayed using cytochrome c.
The enzyme was inhibited by sodium dodecyl sulphate, sodium azide, o-phenanthroline, and EDTA, in descending order.
1(0,0,0,1) Details
15519459 Verdin A, Lounes-Hadj Sahraoui A, Newsam R, Robinson G, Durand R: Polycyclic aromatic hydrocarbons storage by Fusarium solani in intracellular lipid vesicles. Environ Pollut. 2005 Jan;133(2):283-91.


Sodium azide, a cytochrome c oxidation inhibitor, and the two cytoskeleton inhibitors colchicine and cytochalasin did not prevent the transport and accumulation of PAH in lipid vesicles of F. solani hyphae.
0(0,0,0,0) Details
8747893 Salman-Tabcheh S, Guerin MC, Torreilles J: Potential role of the peroxidase-dependent metabolism of serotonin in lowering the polymorphonuclear leukocyte bactericidal function. Free Radic Res. 1996 Jan;24(1):61-8.


The addition of catalase or sodium azide substantially reduced this binding.
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