1
|
Levitskiy OA, Aglamazova OI, Grishin YK, Magdesieva TV. Reductive opening of a cyclopropane ring in the Ni(II) coordination environment: a route to functionalized dehydroalanine and cysteine derivatives. Beilstein J Org Chem 2022; 18:1166-1176. [PMID: 36128429 PMCID: PMC9475196 DOI: 10.3762/bjoc.18.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/24/2022] [Indexed: 11/23/2022] Open
Abstract
The involvement of an α,α-cyclopropanated amino acid in the chiral Ni(II) coordination environment in the form of a Schiff base is considered as a route to electrochemical broadening of the donor-acceptor cyclopropane concept in combination with chirality induction in the targeted products. A tendency to the reductive ring-opening and the follow-up reaction paths of thus formed radical anions influenced by substituents in the cyclopropane ring are discussed. Optimization of the reaction conditions opens a route to the non-proteinogenic amino acid derivatives containing an α-β or β-γ double C=C bond in the side chain; the regioselectivity can be tuned by the addition of Lewis acids. One-pot combination of the reductive ring opening and subsequent addition of thiols allows obtaining the cysteine derivatives in practical yields and with high stereoselectivity at the removed β-stereocenter.
Collapse
Affiliation(s)
- Oleg A Levitskiy
- Lomonosov Moscow State University, Dept. of Chemistry, Leninskie Gory 1/3, Moscow 119991, Russian Federation
| | - Olga I Aglamazova
- Lomonosov Moscow State University, Dept. of Chemistry, Leninskie Gory 1/3, Moscow 119991, Russian Federation
| | - Yuri K Grishin
- Lomonosov Moscow State University, Dept. of Chemistry, Leninskie Gory 1/3, Moscow 119991, Russian Federation
| | - Tatiana V Magdesieva
- Lomonosov Moscow State University, Dept. of Chemistry, Leninskie Gory 1/3, Moscow 119991, Russian Federation
| |
Collapse
|
2
|
Levitskiy OA, Aglamazova OI, Dmitrieva AV, Soloshonok VA, Moriwaki H, Grishin YK, Magdesieva TV. Stereoselective arylthiolation of dehydroalanine in the NiII coordination environment: the stereoinductor of choice. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
3
|
Stereoselective arylthiolation of dehydroalanine in the NiII coordination environment: the stereoinductor of choice. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.04.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
4
|
Evaluation resistance levels of the PCL/Gt nanofiber mats during exposure to PAHs for use in the occupational setting. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0896-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
5
|
Hulst AG, Verstappen DRW, van der Riet-Van Oeveren D, Vermeulen NPE, Noort D. Mass spectrometric identification of isocyanate-induced modifications of keratins in human skin. Chem Biol Interact 2015; 237:141-50. [PMID: 26070416 DOI: 10.1016/j.cbi.2015.06.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 05/13/2015] [Accepted: 06/03/2015] [Indexed: 11/24/2022]
Abstract
In the current paper we show that exposure of human callus to isocyanates leads to covalent modifications within keratin proteins. Mass spectrometric analyses of pronase digests of keratin isolated from exposed callus show that both mono- and di-adducts (for di-isocyanates) are predominantly formed on the ε-amino group of lysine. In addition, numerous modified tryptic keratin fragments were identified, demonstrating rather random lysine modification. Interestingly, preliminary experiments demonstrate that in case of MDI a similar lysine di-adduct was formed with lung elastin. Our data support the hypothesis that skin sensitization through antigenic modifications of skin proteins by isocyanates could play a role in occupational isocyanate-induced asthma. It is further envisaged that the elucidated adducts will also have great potential for use as biomarkers to assess skin exposure to isocyanates. Advantageously, the various lysine adducts display the presence of a characteristic daughter fragment at m/z 173.1 [lysine-NCO](+), enabling generic and rapid screening for exposure to isocyanates.
Collapse
Affiliation(s)
- Albert G Hulst
- TNO, Department of CBRN Protection, P.O. Box 45, 2280 AA Rijswijk, The Netherlands
| | - Daan R W Verstappen
- TNO, Department of CBRN Protection, P.O. Box 45, 2280 AA Rijswijk, The Netherlands; Section of Molecular Toxicology, AIMMS, VU University, Amsterdam, The Netherlands
| | | | - Nico P E Vermeulen
- Section of Molecular Toxicology, AIMMS, VU University, Amsterdam, The Netherlands
| | - Daan Noort
- TNO, Department of CBRN Protection, P.O. Box 45, 2280 AA Rijswijk, The Netherlands.
| |
Collapse
|
6
|
Jiang R, French JE, Stober VP, Kang-Sickel JCC, Zou F, Nylander-French LA. Single-nucleotide polymorphisms associated with skin naphthyl-keratin adduct levels in workers exposed to naphthalene. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:857-864. [PMID: 22391508 PMCID: PMC3385430 DOI: 10.1289/ehp.1104304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 03/05/2012] [Indexed: 05/31/2023]
Abstract
BACKGROUND Individual genetic variation that results in differences in systemic response to xenobiotic exposure is not accounted for as a predictor of outcome in current exposure assessment models. OBJECTIVE We developed a strategy to investigate individual differences in single-nucleotide polymorphisms (SNPs) as genetic markers associated with naphthyl-keratin adduct (NKA) levels measured in the skin of workers exposed to naphthalene. METHODS The SNP-association analysis was conducted in PLINK using candidate-gene analysis and genome-wide analysis. We identified significant SNP-NKA associations and investigated the potential impact of these SNPs along with personal and workplace factors on NKA levels using a multiple linear regression model and the Pratt index. RESULTS In candidate-gene analysis, a SNP (rs4852279) located near the CYP26B1 gene contributed to the 2-naphthyl-keratin adduct (2NKA) level. In the multiple linear regression model, the SNP rs4852279, dermal exposure, exposure time, task replacing foam, age, and ethnicity all were significant predictors of 2NKA level. In genome-wide analysis, no single SNP reached genome-wide significance for NKA levels (all p ≥ 1.05 × 10(-5)). Pathway and network analyses of SNPs associated with NKA levels were predicted to be involved in the regulation of cellular processes and homeostasis. CONCLUSIONS These results provide evidence that a quantitative biomarker can be used as an intermediate phenotype when investigating the association between genetic markers and exposure-dose relationship in a small, well-characterized exposed worker population.
Collapse
Affiliation(s)
- Rong Jiang
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina 27599-7431, USA
| | | | | | | | | | | |
Collapse
|
7
|
Verstappen DRW, Hulst AG, Fidder A, Vermeulen NPE, Noort D. Interactions of organophosphates with keratins in the cornified epithelium of human skin. Chem Biol Interact 2012; 197:93-102. [PMID: 22521715 DOI: 10.1016/j.cbi.2012.04.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 04/03/2012] [Accepted: 04/04/2012] [Indexed: 11/25/2022]
Abstract
Methods to unequivocally assess and quantify exposure to organophosphate anti-cholinesterase agents are highly valuable, either from a biomonitoring or a forensic perspective. Since for both OP pesticides and various nerve agents the skin is a predominant route of entry, we hypothesized that proteins in the skin might represent an ideal source of unequivocal and persistent biomarkers for exposure to these compounds. In this exploratory study we show that keratin proteins in human skin are relevant binding sites for organophosphates. The thick cornified epithelium of human plantar skin (callus) was exposed to a selection of relevant organophosphorus compounds and keratin proteins were subsequently extracted. After carboxymethylation of cysteine residues, enzymatic digestion of the keratins with pronase and trypsin was performed and the resulting amino acid and peptides were analyzed to assess whether covalent adducts had formed. LC-tandem MS analysis of the pronase digests demonstrated that tyrosine and to a lesser extent serine residues were selectively modified by organophosphate pesticides (both phosphorothioates and the corresponding oxon forms) under physiological conditions. In addition, modification of tyrosine with the nerve agent VX was unequivocally assessed. In order to elucidate specific binding sites, LC-tandem MS analysis of trypsin digests showed two separate tryptic keratin fragments, i.e. LASY*LDK and SLY*GLGGSK, with Y* the modified tyrosine residues, originating from keratin 1/6 and keratin 10, respectively. These preliminary findings, revealing novel binding targets for anti-cholinesterase organophosphates, will form a firm basis for the development of novel (non-invasive) methods for assessment of exposure to organophosphates. Whether this binding will also have biological implications remains an issue for further investigations.
Collapse
Affiliation(s)
- Daan R W Verstappen
- TNO Earth, Environmental and Life Sciences, Department of CBRN Protection, P.O. Box 45, 2280 AA, Rijswijk, The Netherlands
| | | | | | | | | |
Collapse
|
8
|
Lee SH, Miyamoto K, Goto T, Oe T. Non-invasive proteomic analysis of human skin keratins: Screening of methionine oxidation in keratins by mass spectrometry. J Proteomics 2011; 75:435-49. [DOI: 10.1016/j.jprot.2011.08.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 08/10/2011] [Accepted: 08/13/2011] [Indexed: 01/23/2023]
|
9
|
Kang-Sickel JCC, Butler MA, Frame L, Serdar B, Chao YCE, Egeghy P, Rappaport SM, Toennis CA, Li W, Borisova T, French JE, Nylander-French LA. The utility of naphthyl-keratin adducts as biomarkers for jet-fuel exposure. Biomarkers 2011; 16:590-9. [PMID: 21961652 DOI: 10.3109/1354750x.2011.611598] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We investigated the association between biomarkers of dermal exposure, naphthyl-keratin adducts (NKA), and urine naphthalene biomarker levels in 105 workers routinely exposed to jet-fuel. A moderate correlation was observed between NKA and urine naphthalene levels (p = 0.061). The NKA, post-exposure breath naphthalene, and male gender were associated with an increase, while CYP2E1*6 DD and GSTT1-plus (++/+-) genotypes were associated with a decrease in urine naphthalene level (p < 0.0001). The NKA show great promise as biomarkers for dermal exposure to naphthalene. Further studies are warranted to characterize the relationship between NKA, other exposure biomarkers, and/or biomarkers of biological effects due to naphthalene and/or PAH exposure.
Collapse
Affiliation(s)
- Juei-Chuan C Kang-Sickel
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Kang-Sickel JCC, Stober VP, French JE, Nylander-French LA. Exposure to naphthalene induces naphthyl-keratin adducts in human epidermis in vitro and in vivo. Biomarkers 2010; 15:488-97. [PMID: 20500019 PMCID: PMC2923669 DOI: 10.3109/1354750x.2010.485700] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We observed naphthyl-keratin adducts and dose-related metabolic enzyme induction at the mRNA level in reconstructed human epidermis in vitro after exposure to naphthalene. Immunofluorescence detection of 2-naphthyl-keratin-1 adducts confirmed the metabolism of naphthalene and adduction of keratin. We also observed naphthyl-keratin adducts in dermal tape-strip samples collected from naphthalene-exposed workers at levels ranging from 0.004 to 6.104 pmol adduct microg(-1) keratin. We have demonstrated the ability of the human skin to metabolize naphthalene and to form naphthyl-keratin adducts both in vitro and in vivo. The results indicate the potential use of keratin adducts as biomarkers of dermal exposure.
Collapse
Affiliation(s)
- Juei-chuan C. Kang-Sickel
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Vandy P. Stober
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - John E. French
- Host Susceptibility Branch, National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Leena A. Nylander-French
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| |
Collapse
|
11
|
Lin CY, Wheelock AM, Morin D, Baldwin RM, Lee MG, Taff A, Plopper C, Buckpitt A, Rohde A. Toxicity and metabolism of methylnaphthalenes: comparison with naphthalene and 1-nitronaphthalene. Toxicology 2009; 260:16-27. [PMID: 19464565 DOI: 10.1016/j.tox.2009.03.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2008] [Revised: 03/01/2009] [Accepted: 03/02/2009] [Indexed: 11/16/2022]
Abstract
Naphthalene and close structural analogues have been shown to cause necrosis of bronchiolar epithelial cells in mice by both inhalation exposure and by systemic administration. Cancer bioassays of naphthalene in mice have demonstrated a slight increase in bronchiolar/alveolar adenomas in female mice, and in inflammation and metaplasia of the olfactory epithelium in the nasal cavity. Similar work in rats demonstrated a significant, and concentration-dependent increase in the incidence of respiratory epithelial adenomas and neuroblastomas in the nasal epithelium of both male and female rats. Although the studies on the acute toxicity of the methylnaphthalene derivatives are more limited, it appears that the species selective toxicity associated with naphthalene administration also is observed with methylnaphthalenes. Chronic administration of the methylnaphthalenes, however, failed to demonstrate the same oncogenic potential as that observed with naphthalene. The information available on the isopropylnaphthalene derivatives suggests that they are not cytotoxic. Like the methylnaphthalenes, 1-nitronaphthalene causes lesions in both Clara and ciliated cells. However, the species selective lung toxicity observed in the mouse with both naphthalene and the methylnaphthalenes is not seen with 1-nitronaphthalene. With 1-nitronaphthalene, the rat is far more susceptible to parenteral administration of the compound than mice. The wide-spread distribution of these compounds in the environment and the high potential for low level exposure to humans supports a need for further work on the mechanisms of toxicity in animal models with attention to whether these processes are applicable to humans. Although it is tempting to suppose that the toxicity and mechanisms of toxicity of the alkylnaphthalenes and nitronaphthalenes are similar to naphthalene, there is sufficient published literature to suggest that this may not be the case. Certainly the enzymes involved in the metabolic activation of each of these substrates are likely to differ. The available data showing extensive oxidation of the aromatic nucleus of naphthalene, nitronaphthalene and the methylnaphthalenes (with some oxidation of the methyl group) contrast with the isopropylnaphthalene derivatives, where the major metabolites involve side chain oxidation. Overall, these data support the view that ring epoxidation is a key step in the process involved in cytotoxicity. Whether the epoxide itself or a downstream metabolite mediates the toxic effects is still not clear even with naphthalene, the best studied of this group of compounds. Additional work is needed in several areas to further assess the potential human health consequences of exposure to these agents. These studies should involve the definition of the extent and severity of methylnaphthalene toxicity after single dose exposures with attention to both the nasal and respiratory epithelia. The cytochromes P450 responsible for the initial activation of these agents in rodents with subsequent complimentary studies in primate models should help determine whether key metabolic processes responsible for toxicity occur also in primates. Finally, the precise involvement of reactive metabolite formation and adduction of cellular proteins in toxicity will be important in not only assessing the potential for human toxicity, but also in developing an understanding of the genetic and environmental factors which could alter the toxicity of these agents.
Collapse
Affiliation(s)
- Ching Yu Lin
- Department of Molecular Biosciences and Anatomy, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | | | | | | | | | | | | | | | | |
Collapse
|