NO, nitrosonium ions, nitroxide ions, nitrosothiols and iron-nitrosyls in biology: a chemist's perspective

doi:10.1016/S0165-6147(00)88968-3

Trends in Pharmacological Sciences

Volume 16, Issue 1, January 1995, Pages 18-22

https://doi.org/10.1016/S0165-6147(00)88968-3 Get rights and content

Abstract

The multiplicity of biological functions thus far attributed to NO has led to suggestions that some effects might be mediated by other, related species instead. The radical nature of NO cannot account for its cytotoxicity, but its reaction with Superoxide to form peroxynitite and highly reactive hydroxyl radicals may be important in this context. The ease with which NO can react with and destroy FeS clusters is also an important factor. Nitrosonium and nitroxide ions can be produced in vivo and will react under conditions that are physiologically relevant. Both could, in theory, serve in cell signalling or as cytotoxic agents. More direct experimental evidence for their involvement is needed before we can confidently assign them specific biological roles. In this article, Anthony Butler, Frederick Flitney and Lyn Williams discuss the chemistry of NO and related species.

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Acute exposure to ozone causes oxidative stress, characterized by increases in nitric oxide (NO) and other reactive nitrogen species in the lung. NO has been shown to modify thiols generating S-nitrosothiols (SNOs); this results in altered protein function. In macrophages this can lead to changes in inflammatory activity which impact the resolution of inflammation. As SNO formation is dependent on the redox state of both the NO donor and the recipient thiol, the local microenvironment plays a key role in its regulation. This dictates not only the chemical feasibility of SNO formation but also mechanisms by which they may form. In these studies, we compared the ability of the SNO donors, ethyl nitrite (ENO), which targets both hydrophobic and hydrophilic thiols, SNO-propanamide (SNOPPM) which targets hydrophobic thiols, and S-nitroso-N-acetylcysteine. (SNAC) which targets hydrophilic thiols. to modify macrophage activation following ozone exposure. Mice were treated with air or ozone (0.8 ppm, 3 h) followed 1 h later by intranasal administration of ENO, SNOPPM or SNAC (1–500 μM) or appropriate controls. Mice were euthanized 48 h later. Each of the SNO donors reduced ozone-induced inflammation and modified the phenotype of macrophages both within the lung lining fluid and the tissue. ENO and SNOPPM were more effective than SNAC. These findings suggest that the hydrophobic SNO thiol pool targeted by SNOPPM and ENO plays a major role in regulating macrophage phenotype following ozone induced injury.
Roles and current applications of S-nitrosoglutathione in anti-infective biomaterials
2022, Materials Today Bio
Citation Excerpt :
Third, endogenous GSNO was demonstrated to promote the production of vascular endothelial growth factor (VEGF), regulate angiogenesis, and prevent embolization of the vasculature [30–32]. Fourth, GSNO differs from most of the other RSNOs because of its effective direct contribution to the S-nitrosation of enzymes containing sulfhydryl, during which the thiol groups are blocked on the enzymes reversibly [33,34], and lastly GSNO is relatively easier to synthesize and purify [27]. Therefore, GSNO is a desirable agent for endogenous NO production.
Bacterial infections can compromise the physical and biological functionalities of humans and pose a huge economical and psychological burden on infected patients. Nitric oxide (NO) is a broad-spectrum antimicrobial agent, whose mechanism of action is not affected by bacterial resistance. S-nitrosoglutathione (GSNO), an endogenous donor and carrier of NO, has gained increasing attention because of its potent antibacterial activity and efficient biocompatibility. Significant breakthroughs have been made in the application of GSNO in biomaterials. This review is based on the existing evidence that comprehensively summarizes the progress of antimicrobial GSNO applications focusing on their anti-infective performance, underlying antibacterial mechanisms, and application in anti-infective biomaterials. We provide an accurate overview of the roles and applications of GSNO in antibacterial biomaterials and shed new light on the avenues for future studies.
The emerging roles of nitric oxide in ferroptosis and pyroptosis of tumor cells
2022, Life Sciences
Citation Excerpt :
One explanation is that NO molecule generates NO+, which directly forms thiol compound with protein cysteine sulfhydryl group. Another interpretation depends on its role as free radicals [52–54]. In addition to direct reaction, S-nitrosylation is achieved mainly through transnitrosylation because of the instability of NO. The specific process is as follows:
Tumor cells can develop resistance to cell death which is divided into necrosis and programmed cell death (PCD). PCD, including apoptosis, autophagy, ferroptosis, pyroptosis, and necroptosis. Ferroptosis and pyroptosis, two new forms of cell death, have gradually been of interest to researchers. Boosting ferroptosis and pyroptosis of tumor cells could be a potential cancer therapy. Nitric oxide (NO) is a ubiquitous, lipophilic, highly diffusible, free-radical signaling molecule that plays various roles in tumorigenesis. In addition, NO also has regulatory mechanisms through S-nitrosylation that do not depend on the classic NO/sGC/cGMP signaling. The current tumor treatment strategy for NO is to promote cell death through promoting S-nitrosylation-induced apoptosis while multiple drawbacks dampen this tumor therapy. However, numerous studies have suggested that suppression of NO is perceived to active ferroptosis and pyroptosis, which could be a better anti-tumor treatment. In this review, ferroptosis and pyroptosis are described in detail. We summarize that NO influences ferroptosis and pyroptosis and infer that S-nitrosylation mediates ferroptosis- and pyroptosis-related signaling pathways. It could be a potential cancer therapy different from NO-induced apoptosis of tumor cells. Finally, the information shows the drugs that manipulate endogenous production and exogenous delivery of NO to modulate the levels of S-nitrosylation.
Nitric oxide and its derivatives in the cancer battlefield
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Elevated levels of reactive nitrogen species, alteration in redox balance and deregulated redox signaling are common hallmarks of cancer progression and chemoresistance. However, depending on the cellular context, distinct reactive nitrogen species are also hypothesized to mediate cytotoxic activity and are thus used in anticancer therapies. We present here the dual face of nitric oxide and its derivatives in cancer biology. Main derivatives of nitric oxide, such as nitrogen dioxide and peroxynitrite cause cell death by inducing protein and lipid peroxidation and/or DNA damage. Moreover, they control the activity of important protein players within the pro- and anti-apoptotic signaling pathways. Thus, the control of intracellular reactive nitrogen species may become a sophisticated tool in anticancer strategies.
Characterization of human triosephosphate isomerase S-nitrosylation
2018, Nitric Oxide - Biology and Chemistry
Triosephosphate isomerase (TPI), the glycolytic enzyme that catalyzes the isomerization of dihydroxyacetone phosphate (DHAP) to glyceraldehyde-3-phosphate (G3P), has been frequently identified as a target of S-nitrosylation by proteomic studies. However, the effect of S-nitrosylation on its activity has only been explored in plants and algae. Here, we describe the in vitro S-nitrosylation of human TPI (hTPI), and the effect of the modification on its enzymatic parameters. NO-incorporation into the enzyme cysteine residues occurred by a time-dependent S-transnitrosylation from both, S-nitrosocysteine (CySNO) and S-nitrosoglutathione (GSNO), with CySNO being the more efficient NO-donor. Both X-ray crystal structure and mass spectrometry analyses showed that only Cys217 was S-nitrosylated. hTPI S-nitrosylation produced a 30% inhibition of the Vmax of the DHAP conversion to G3P, without affecting the Km for DHAP. This is the first study describing features of human TPI S-nitrosylation.
Role of estrogen and levodopa in 1-methyl-4-pheny-l-1, 2, 3, 6-tetrahydropyridine (mptp)-induced cognitive deficit in Parkinsonian ovariectomized mice model: A comparative study
2017, Journal of Chemical Neuroanatomy
Parkinson’s disease (PD) is one of the most common neurodegenerative disease found in the aging population. Currently, many studies are being conducted to find a suitable and effective cure for PD, with an emphasis on the use of herbal plants.
In this study, the neuroprotective effects of estrogen was evaluated in the 1-methyl-4-phe-nyl-1,2,3,6-tetrahydropyridine (MPTP) model of PD with cognitive deficit and compared to Levodopa (LD), a well reported neuroprotective agent used for treating PD. Twenty-four Swiss albino mice were randomly divided into four groups: Control, MPTP, MPTP + LD and MPTP + estrogen. The behavioral recovery in both LD and estrogen treated mice were investigated using the rotarod, foot printing, narrow beam walking test and hanging tests. Non-motor behavioral recovery in both LD and estrogen treated were investigated using the Y-maze and Morris water maze. Furthermore, we performed the biochemical test i.e. catalase, lipid and nitrite in prefrontal cortex as well as nigrostriatal region of mouse brain. We also performed the acetylcholine esterase activity in prefrontal cortex and nigrostriatal region of mice brain. The recovery of dopamine neurons in the substantia nigra (SN) region was estimated by immunostaining of tyrosine hydroxylase (TH).
Estrogen treatment restored all the deficits induced by MPTP more effectively than levodopa. Estrogen treatment recovered the number of TH-positive cells in both the SN region. Treatment with Estrogen significantly increased the levels of catalase, decreased the level of lipid and nitite in both region SN as well as prefrontal cortex region. Notably, the effect of estrogen was greater than that elicited by levodopa. Acetylcholine esterase activity was significantly increased in MPTP and it was found to be decreased by the treatment of estrogen as well as levodopa, although decrease in the activity was highly significant in estrogen treated group.
Our result suggested that estrogen treatment significantly reduced the MPTP induced neurotoxicity as evident by decrease in oxidative damage, physiological abnormalities and immunohistochemical changes in the Parkinsonian mouse with cognitive deficit as compared to levodopa treatment.

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Trends in Pharmacological Sciences

ViewpointNO, nitrosonium ions, nitroxide ions, nitrosothiols and iron-nitrosyls in biology: a chemist's perspective

Abstract

Nature

Nature

Nature

Br. J. Pharmacol.

Biochemistry

Biochem. Biophys. Res. Commun.

J. Exp. Med.

Chem. Res. Toxicol.

J. Biol. Chem.

Biochim. Biophys. Acta

Nature

Nature

Biochim. Biophys. Acta

J. Org. Chem.

J. Chem. Soc. Chem. Comm.

J. Pharmacol. Exp. Ther.

J. Pharmacol. Exp. Ther.

Nature

J. Chem. Soc. Perkin Trans.

Viewpoint
NO, nitrosonium ions, nitroxide ions, nitrosothiols and iron-nitrosyls in biology: a chemist's perspective