Lineage-related cytotoxicity and clonogenic profile of 1,4-benzoquinone-exposed hematopoietic stem and progenitor cells

Chow, Paik Wah; Hamid, Zariyantey Abdul; Chan, Kok Meng; Inayat-Hussain, Salmaan H.; Rajab, Nor Fadilah

doi:10.1016/j.taap.2015.01.016

Cited by 21 publications

(26 citation statements)

References 52 publications

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“…While the carcinogenic [ 20 , 21 ] and hemato-toxic [ 22 – 24 ] effects of benzene are known, it is not clear if exposure to this aromatic also contributes to cardiovascular disease. To begin to examine this, we first assessed the level of circulating angiogenic cells (Flk + /Sca + ) in mice inhaling volatile benzene.…”

Section: Resultsmentioning

confidence: 99%

Benzene exposure is associated with cardiovascular disease risk

et al. 2017

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Benzene is a ubiquitous, volatile pollutant present at high concentrations in toxins (e.g. tobacco smoke) known to increase cardiovascular disease (CVD) risk. Despite its prevalence, the cardiovascular effects of benzene have rarely been studied. Hence, we examined whether exposure to benzene is associated with increased CVD risk. The effects of benzene exposure in mice were assessed by direct inhalation, while the effects of benzene exposure in humans was assessed in 210 individuals with mild to high CVD risk by measuring urinary levels of the benzene metabolite trans,trans-muconic acid (t,t-MA). Generalized linear models were used to assess the association between benzene exposure and CVD risk. Mice inhaling volatile benzene had significantly reduced levels of circulating angiogenic cells (Flk-1+/Sca-1+) as well as an increased levels of plasma low-density lipoprotein (LDL) compared with control mice breathing filtered air. In the human cohort, urinary levels of t,t-MA were inversely associated several populations of circulating angiogenic cells (CD31+/34+/45+, CD31+/34+/45+/AC133–, CD34+/45+/AC133+). Although t,t-MA was not associated with plasma markers of inflammation or thrombosis, t,t-MA levels were higher in smokers and in individuals with dyslipidemia. In smokers, t,t-MA levels were positively associated with urinary metabolites of nicotine (cotinine) and acrolein (3-hydroxymercapturic acid). Levels of t,t-MA were also associated with CVD risk as assessed using the Framingham Risk Score and this association was independent of smoking. Thus, benzene exposure is associated with increased CVD risk and deficits in circulating angiogenic cells in both smokers and non-smokers.

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Section: Resultsmentioning

confidence: 99%

Benzene exposure is associated with cardiovascular disease risk

et al. 2017

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“…A very recent study showed that 1,4-benzoquinone (BQ) induced cell apoptosis in a concentration-dependent manner in mouse bone marrow cells [ 36 ]. However, another study reported that TCBQ induced oxidative stress but not apoptosis in male Kunming mice [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluating the Effects of Tetrachloro-1,4-benzoquinone, an Active Metabolite of Pentachlorophenol, on the Growth of Human Breast Cancer Cells

Ling

Gao

Yang

2016

Journal of Toxicology

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Tetrachloro-1,4-benzoquinone (TCBQ), an active metabolite of pentachlorophenol (PCP), is genotoxic and potentially carcinogenic. As an electrophilic and oxidative molecule, TCBQ can conjugate with deoxyguanosine in DNA molecules and/or impose oxidative stress in cells. In the current study, we investigated the effects of TCBQ on intracellular ROS production, apoptosis, and cytotoxicity against three different subtypes of human breast cancer cells. Luminal A subtype MCF7 (ER+, PR+, HER2−) cells maintained the highest intracellular ROS level and were subjected to TCBQ-induced ROS reduction, apoptosis, and cytotoxicity. HER2 subtype Sk-Br-3 (ER−, PR−, HER2+) cells possessed the lowest intracellular ROS level. TCBQ promoted ROS production, inhibited apoptosis, and elevated cytotoxicity (due to necrosis) against Sk-Br-3 cells. Triple-negative/basal-like subtype MDA-MB-231 cells were less sensitive towards TCBQ treatment. Therefore, the effect of prolonged exposure to PCP and its active metabolites on cancer growth is highly cancer-cell-type specific.

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“…Apoptosis is an important mechanism involving benzene and its metabolites, including 1,4‐BQ. Previous studies showed that 1,4‐BQ caused apoptosis in primary cells and cell lines, such as mouse bone marrow cells, 30 U937, 15 and AHH‐1 31 . Caspase‐8 and caspase‐9 mediate apoptosis in the death receptor pathway and mitochondrial pathway, respectively.…”

Section: Discussionmentioning

confidence: 99%

l‐Carnitine protects against 1,4‐benzoquinone‐induced apoptosis and DNA damage by suppressing oxidative stress and promoting fatty acid oxidation in K562 cells

Sun

Man

et al. 2020

Environmental Toxicology

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Widespread occupational and environmental exposure to benzene is unavoidable and poses a public health threat. Studies of potential interventions to prevent or relieve benzene toxicity are, thus, essential. Research has shown l‐carnitine (LC) has beneficial effects against various pathological processes and diseases. LC possesses antioxidant activities and participates in fatty acid oxidation (FAO). In this study, we investigated whether 1,4‐benzoquinone (1,4‐BQ) affects LC levels and the FAO pathway, as well as analyzed the influence of LC on the cytotoxic effects of 1,4‐BQ. We found that 1,4‐BQ significantly decreased LC levels and downregulated Cpt1a, Cpt2, Crat, Hadha, Acaa2, and Acadvl mRNA expression in K562 cells. Subsequent assays confirmed that 1,4‐BQ decreased cell viability and increased apoptosis and caspase‐3, ‐8, and ‐9 activities. It also induced obvious oxidative stress and DNA damage, including an increase in the levels of reactive oxygen species and malondialdehyde, tail DNA%, and olive tail moment. Additionally, the mitochondrial membrane potential was significantly reduced. Cotreatment with LC (500 μmol/L) relieved these alterations by reducing oxidative stress and increasing the protein expression levels of Cpt1a and Hadha, particularly in the 20 μmol/L 1,4‐BQ group. Thus, our results demonstrate that 1,4‐BQ causes cytotoxicity, reduces LC levels, and downregulates the FAO genes. In contrast, LC exhibits protective effects against 1,4‐BQ‐induced apoptosis and DNA damage by decreasing oxidative stress and promoting the FAO pathway.

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Lineage-related cytotoxicity and clonogenic profile of 1,4-benzoquinone-exposed hematopoietic stem and progenitor cells

Cited by 21 publications

References 52 publications

Benzene exposure is associated with cardiovascular disease risk

Benzene exposure is associated with cardiovascular disease risk

Evaluating the Effects of Tetrachloro-1,4-benzoquinone, an Active Metabolite of Pentachlorophenol, on the Growth of Human Breast Cancer Cells

l‐Carnitine protects against 1,4‐benzoquinone‐induced apoptosis and DNA damage by suppressing oxidative stress and promoting fatty acid oxidation in K562 cells

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