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Wen S, Wang L. Cadmium neurotoxicity and therapeutic strategies. J Biochem Mol Toxicol 2024; 38:e23670. [PMID: 38432689 DOI: 10.1002/jbt.23670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/26/2024] [Accepted: 02/23/2024] [Indexed: 03/05/2024]
Abstract
Cadmium (Cd) is a multitarget, carcinogenic, nonessential environmental pollutant. Due to its toxic effects at very low concentrations, lengthy biological half-life, and low excretion rate, exposure to Cd carries a concern. Prolonged exposure to Cd causes severe injury to the nervous system of both humans and animals. Nevertheless, the precise mechanisms responsible for the neurotoxic effects of Cd have yet to be fully elucidated. The accurate chemical mechanism potentially entails the destruction of metal-ion homeostasis, inducing oxidative stress, apoptosis, and autophagy. Here we review the evidence of the neurotoxic effects of Cd and corresponding strategies to protect against Cd-induced central nervous system injury.
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Affiliation(s)
- Shuangquan Wen
- Suzhou Chien-Shiung Institute of Technology, Taicang, China
- Veterinarian Clinical Diagnosis Study Group, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Liang Wang
- Suzhou Chien-Shiung Institute of Technology, Taicang, China
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2
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Fukui K, Yamamoto T, Murakawa T, Baba S, Kumasaka T, Yano T. Catalytic mechanism of the zinc-dependent MutL endonuclease reaction. Life Sci Alliance 2023; 6:e202302001. [PMID: 37487639 PMCID: PMC10366529 DOI: 10.26508/lsa.202302001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/26/2023] Open
Abstract
DNA mismatch repair endonuclease MutL binds two zinc ions. However, the endonuclease activity of MutL is drastically enhanced by other divalent metals such as manganese, implying that MutL binds another catalytic metal at some site other than the zinc-binding sites. Here, we solved the crystal structure of the endonuclease domain of Aquifex aeolicus MutL in the manganese- or cadmium-bound form, revealing that these metals compete with zinc at the same sites. Mass spectrometry revealed that the MutL yielded 5'-phosphate and 3'-OH products, which is characteristic of the two-metal-ion mechanism. Crystallographic analyses also showed that the position and flexibility of a highly conserved Arg of A. aeolicus MutL altered depending on the presence of zinc/manganese or the specific inhibitor cadmium. Site-directed mutagenesis revealed that the Arg was critical for the catalysis. We propose that zinc ion and its binding sites are physiologically of catalytic importance and that the two-metal-ion mechanism works in the reaction, where the Arg plays a catalytic role. Our results also provide a mechanistic insight into the inhibitory effect of a mutagen/carcinogen, cadmium, on MutL.
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Affiliation(s)
- Kenji Fukui
- Department of Biochemistry, Faculty of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Tatsuya Yamamoto
- Bioorganic Research Institute, Suntory Foundation for Life Sciences, Kyoto, Japan
| | - Takeshi Murakawa
- Department of Biochemistry, Faculty of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
| | - Seiki Baba
- Structural Biology Division, Japan Synchrotron Radiation Research Institute (JASRI), Hyogo, Japan
| | - Takashi Kumasaka
- Structural Biology Division, Japan Synchrotron Radiation Research Institute (JASRI), Hyogo, Japan
| | - Takato Yano
- Department of Biochemistry, Faculty of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan
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3
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Oleic Acid Facilitates Cd Excretion by Increasing the Abundance of Burkholderia in Cd-Exposed Mice. Int J Mol Sci 2022; 23:ijms232314718. [PMID: 36499044 PMCID: PMC9741113 DOI: 10.3390/ijms232314718] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022] Open
Abstract
As a global pollutant, cadmium (Cd) can easily enter the body through food chains, threatening human health. Most Cd is initially absorbed in the gut, with the gut microbiota playing a pivotal role in reducing Cd absorption and accumulation. This study assessed the effects of three fatty acids on Cd accumulation and toxicity in Cd-exposed mice. The results showed that oleic acid (OA) was the most effective in facilitating Cd excretion in mice among these fatty acids. The use of OA led to reduced Cd accumulation in the organs and increased Cd content in the feces. The metagenomic analysis of the gut microbiota showed that the genus Burkholderia was the most significantly restored by OA in Cd-exposed mice. Burkholderia cepacia, as the type species for the genus Burkholderia, also exhibited strong Cd tolerance after treatment with OA. Furthermore, the electron microscopy analysis showed that most of the Cd was adsorbed on the surface of B. cepacia, where the extracellular polymeric substances (EPSs) secreted by B. cepacia play a key role, displaying a strong capacity for Cd adsorption. The peak at 2355 cm-1 and the total sulfhydryl group content of EPSs showed significant increases following co-treatment with Cd and OA. The results demonstrated the potential roles that gut Burkholderia may play in OA-mediated Cd excretion in mice.
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4
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Liang F, Hu J, Liu B, Li L, Yang X, Bai C, Tan X. New Evidence of Semi-Mangrove Plant Barringtonia racemosa in Soil Clean-Up: Tolerance and Absorption of Lead and Cadmium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12947. [PMID: 36232247 PMCID: PMC9566725 DOI: 10.3390/ijerph191912947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/04/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Mangrove plants play an important role in the remediation of heavy-metal-contaminated estuarine and coastal areas; Barringtonia racemosa is a typical semi-mangrove plant. However, the effect of heavy metal stress on this plant has not been explored. In this study, tolerance characteristics and the accumulation profile of cadmium (Cd) and lead (Pb) in B. racemosa were evaluated. The results indicated that B. racemosa exhibited a high tolerance in single Cd/Pb and Cd + Pb stress, with a significant increase in biomass yield in all treatment groups, a significant increase in plant height, leaf area, chlorophyll and carotenoid content in most treatment groups and without significant reduction of SOD, POD, MDA, proline content, Chl a, Chl b, Chl a + b, Car, ratio of Chl a:b and ratio of Car:Chl (a + b). Cd and Pb mainly accumulated in the root (≥93.43%) and the content of Cd and Pb in B. racemosa was root > stem > leaf. Pb showed antagonistic effects on the Cd accumulation in the roots and Cd showed antagonistic or synergistic effects on the Pb accumulation in the roots, which depended on the concentration of Cd and Pb. There was a significant synergistic effect of Cd and Pb enrichment under a low Cd and Pb concentration treatment. Thus, phytoremediation could potentially use B. racemosa for Cd and Pb.
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Affiliation(s)
- Fang Liang
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Ju Hu
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Bing Liu
- Forestry of College, Guangxi University, Nanning 530001, China
| | - Lin Li
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
| | - Xiuling Yang
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
| | - Caihong Bai
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Xiaohui Tan
- Guangxi Subtropical Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530001, China
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Tsutakawa SE, Bacolla A, Katsonis P, Bralić A, Hamdan SM, Lichtarge O, Tainer JA, Tsai CL. Decoding Cancer Variants of Unknown Significance for Helicase-Nuclease-RPA Complexes Orchestrating DNA Repair During Transcription and Replication. Front Mol Biosci 2021; 8:791792. [PMID: 34966786 PMCID: PMC8710748 DOI: 10.3389/fmolb.2021.791792] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 11/16/2021] [Indexed: 01/13/2023] Open
Abstract
All tumors have DNA mutations, and a predictive understanding of those mutations could inform clinical treatments. However, 40% of the mutations are variants of unknown significance (VUS), with the challenge being to objectively predict whether a VUS is pathogenic and supports the tumor or whether it is benign. To objectively decode VUS, we mapped cancer sequence data and evolutionary trace (ET) scores onto crystallography and cryo-electron microscopy structures with variant impacts quantitated by evolutionary action (EA) measures. As tumors depend on helicases and nucleases to deal with transcription/replication stress, we targeted helicase–nuclease–RPA complexes: (1) XPB-XPD (within TFIIH), XPF-ERCC1, XPG, and RPA for transcription and nucleotide excision repair pathways and (2) BLM, EXO5, and RPA plus DNA2 for stalled replication fork restart. As validation, EA scoring predicts severe effects for most disease mutations, but disease mutants with low ET scores not only are likely destabilizing but also disrupt sophisticated allosteric mechanisms. For sites of disease mutations and VUS predicted to be severe, we found strong co-localization to ordered regions. Rare discrepancies highlighted the different survival requirements between disease and tumor mutations, as well as the value of examining proteins within complexes. In a genome-wide analysis of 33 cancer types, we found correlation between the number of mutations in each tumor and which pathways or functional processes in which the mutations occur, revealing different mutagenic routes to tumorigenesis. We also found upregulation of ancient genes including BLM, which supports a non-random and concerted cancer process: reversion to a unicellular, proliferation-uncontrolled, status by breaking multicellular constraints on cell division. Together, these genes and global analyses challenge the binary “driver” and “passenger” mutation paradigm, support a gradient impact as revealed by EA scoring from moderate to severe at a single gene level, and indicate reduced regulation as well as activity. The objective quantitative assessment of VUS scoring and gene overexpression in the context of functional interactions and pathways provides insights for biology, oncology, and precision medicine.
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Affiliation(s)
- Susan E Tsutakawa
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Albino Bacolla
- Department of Molecular and Cellular Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Panagiotis Katsonis
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Amer Bralić
- Laboratory of DNA Replication and Recombination, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Samir M Hamdan
- Laboratory of DNA Replication and Recombination, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Olivier Lichtarge
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, United States
| | - John A Tainer
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA, United States.,Department of Molecular and Cellular Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States.,Department of Cancer Biology, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Chi-Lin Tsai
- Department of Molecular and Cellular Oncology, University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
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Ozturk M, Metin M, Altay V, De Filippis L, Ünal BT, Khursheed A, Gul A, Hasanuzzaman M, Nahar K, Kawano T, Caparrós PG. Molecular Biology of Cadmium Toxicity in Saccharomyces cerevisiae. Biol Trace Elem Res 2021; 199:4832-4846. [PMID: 33462792 DOI: 10.1007/s12011-021-02584-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/08/2021] [Indexed: 02/08/2023]
Abstract
Cadmium (Cd) is a toxic heavy metal mainly originating from industrial activities and causes environmental pollution. To better understand its toxicity and pollution remediation, we must understand the effects of Cd on living beings. Saccharomyces cerevisiae (budding yeast) is an eukaryotic unicellular model organism. It has provided much scientific knowledge about cellular and molecular biology in addition to its economic benefits. Effects associated with copper and zinc, sulfur and selenium metabolism, calcium (Ca2+) balance/signaling, and structure of phospholipids as a result of exposure to cadmium have been evaluated. In yeast as a result of cadmium stress, "mitogen-activated protein kinase," "high osmolarity glycerol," and "cell wall integrity" pathways have been reported to activate different signaling pathways. In addition, abnormalities and changes in protein structure, ribosomes, cell cycle disruption, and reactive oxygen species (ROS) following cadmium cytotoxicity have also been detailed. Moreover, the key OLE1 gene that encodes for delta-9 FA desaturase in relation to cadmium toxicity has been discussed in more detail. Keeping all these studies in mind, an attempt has been made to evaluate published cellular and molecular toxicity data related to Cd stress, and specifically published on S. cerevisiae.
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Affiliation(s)
- Munir Ozturk
- Department of Botany and Centre for Environmental Studies, Ege University, Izmir, Turkey.
| | - Mert Metin
- Graduate School of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Volkan Altay
- Department of Biology, Faculty of Science and Arts, Hatay Mustafa Kemal University, Antakya, Hatay, Turkey
| | - Luigi De Filippis
- School of Life Sciences, University of Technology Sydney, Sydney, 123, Australia
| | - Bengu Turkyilmaz Ünal
- Faculty of Science and Arts, Department of Biotechnology, Nigde Omer Halisdemir University, Nigde, Turkey
| | - Anum Khursheed
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Alvina Gul
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences & Technology, Islamabad, Pakistan
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - Kamuran Nahar
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
| | - Tomonori Kawano
- Graduate School of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Pedro García Caparrós
- Agronomy Department of Superior School Engineering, University of Almería, Ctra. Sacramento s/n, La Cañadade San Urbano, 04120, Almería, Spain
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7
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Dai SD, Wang S, Qin YN, Zhu JC. Multiomics Landscape Uncovers the Molecular Mechanism of the Malignant Evolution of Lung Adenocarcinoma Cells to Chronic Low Dose Cadmium Exposure. Front Oncol 2021; 11:654687. [PMID: 34858801 PMCID: PMC8631903 DOI: 10.3389/fonc.2021.654687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 10/26/2021] [Indexed: 11/23/2022] Open
Abstract
Cadmium (Cd) from cigarette smoke and polluted air can lead to lung adenocarcinoma after long-term inhalation. However, most studies are based on short-term exposure to this toxic metal at high concentrations. Here, we investigate the effects of long-term exposure of A549 cells (lung adenocarcinoma) to cadmium at low concentrations using morphological and multiomics analyses. First, we treated A549 cells continuously with CdCl2 at 1μM for 8 months and found that CdCl2 promoted cellular migration and invasion. After that, we applied transmission electron and fluorescence microscopies and did not observe significant morphological changes in Golgi apparatus, endoplasmic reticulum, lysosomes, or mitochondria on Cd treated cells; microfilaments, in contrast, accumulated in lamellipodium and adhesion plaques, which suggested that Cd enhanced cellular activity. Second, by using whole-exome sequencing (WES) we detected 4222 unique SNPs in Cd-treated cells, which included 382 unique non-synonymous mutation sites. The corresponding mutated genes, after GO and KEGG enrichments, were involved mainly in cell adhesion, movement, and metabolic pathways. Third, by RNA-seq analysis, we showed that 1250 genes (784 up and 466 down), 1623 mRNAs (1023 up and 591 down), and 679 lncRNAs (375 up and 304 down) were expressed differently. Furthermore, GO enrichment of these RNA-seq results suggested that most differentially expressed genes were related to cell adhesion and organization of the extracellular matrix in biological process terms; KEGG enrichment revealed that the differentially expressed genes took part in 26 pathways, among which the metabolic pathway was the most significant. These findings could be important for unveiling mechanisms of Cd-related cancers and for developing cancer therapies in the future.
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Affiliation(s)
- Shun-Dong Dai
- Department of Pathology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Shuang Wang
- Department of Pathology, Shenyang Red Cross Hospital, Shenyang, China
| | - Ya-Nan Qin
- Department of Pathology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Jin-Chao Zhu
- Department of Pathology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
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Wang Z, Kong F, Fu L, Li Y, Li M, Yu Z. Responses of Asian clams (Corbicula fluminea) to low concentration cadmium stress: Whether the depuration phase restores physiological characteristics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 284:117182. [PMID: 33901982 DOI: 10.1016/j.envpol.2021.117182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/21/2021] [Accepted: 04/14/2021] [Indexed: 06/12/2023]
Abstract
The effect of low concentration Cd stress on bivalves is unclear. In this study, Asian clams (Corbicula fluminea) were continuously exposed to 0, 0.05, 0.10, and 0.20 mg/L Cd for 14 d (exposure phase) and to artificial freshwater for 7 d (depuration phase). A total of 16 variables were measured to explore the toxic effects on C. fluminea. All physiological characteristics were significantly inhibited in the treatments (p < 0.05), and the negative effects of Cd did not return to normal levels in the short term. Tissue damage was found in the feet and gills of C. fluminea in all the treatments. On the 7th day (D7), enzyme activity in all the treatments was significantly higher (p < 0.05) than in the control group. Acetylcholinesterase, superoxide dismutase, and catalase activities were enhanced on D14 in all the treatments. However, only glutathione S-transferase activity was significantly higher in all the treatments (p < 0.05) than in the control group on D21. The instability of the enzymes indicated that the adaptability of C. fluminea became stronger throughout the experiment. In each group, the maximum bioaccumulation of Cd followed the order: 0.20 mg/L > 0.05 mg/L > 0.10 mg/L, which might be caused by the filtration capacity of C. fluminea in the 0.05-mg/L group, which was higher than that of the 0.10-mg/L group. Thus, low Cd concentrations effect the physiological characteristics, tissue health, and antioxidant system of C. fluminea and may require a long recovery time to be restored to normal levels.
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Affiliation(s)
- Zhen Wang
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China
| | - Fanlong Kong
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China
| | - Lingtao Fu
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China
| | - Yue Li
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China
| | - Minghui Li
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China
| | - Zhengda Yu
- College of Environmental Sciences and Engineering, Qingdao University, Qingdao, 266071, China.
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Hammel M, Tainer JA. X-ray scattering reveals disordered linkers and dynamic interfaces in complexes and mechanisms for DNA double-strand break repair impacting cell and cancer biology. Protein Sci 2021; 30:1735-1756. [PMID: 34056803 PMCID: PMC8376411 DOI: 10.1002/pro.4133] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 05/23/2021] [Accepted: 05/25/2021] [Indexed: 12/17/2022]
Abstract
Evolutionary selection ensures specificity and efficiency in dynamic metastable macromolecular machines that repair DNA damage without releasing toxic and mutagenic intermediates. Here we examine non‐homologous end joining (NHEJ) as the primary conserved DNA double‐strand break (DSB) repair process in human cells. NHEJ has exemplary key roles in networks determining the development, outcome of cancer treatments by DSB‐inducing agents, generation of antibody and T‐cell receptor diversity, and innate immune response for RNA viruses. We determine mechanistic insights into NHEJ structural biochemistry focusing upon advanced small angle X‐ray scattering (SAXS) results combined with X‐ray crystallography (MX) and cryo‐electron microscopy (cryo‐EM). SAXS coupled to atomic structures enables integrated structural biology for objective quantitative assessment of conformational ensembles and assemblies in solution, intra‐molecular distances, structural similarity, functional disorder, conformational switching, and flexibility. Importantly, NHEJ complexes in solution undergo larger allosteric transitions than seen in their cryo‐EM or MX structures. In the long‐range synaptic complex, X‐ray repair cross‐complementing 4 (XRCC4) plus XRCC4‐like‐factor (XLF) form a flexible bridge and linchpin for DNA ends bound to KU heterodimer (Ku70/80) and DNA‐PKcs (DNA‐dependent protein kinase catalytic subunit). Upon binding two DNA ends, auto‐phosphorylation opens DNA‐PKcs dimer licensing NHEJ via concerted conformational transformations of XLF‐XRCC4, XLF–Ku80, and LigIVBRCT–Ku70 interfaces. Integrated structures reveal multifunctional roles for disordered linkers and modular dynamic interfaces promoting DSB end processing and alignment into the short‐range complex for ligation by LigIV. Integrated findings define dynamic assemblies fundamental to designing separation‐of‐function mutants and allosteric inhibitors targeting conformational transitions in multifunctional complexes.
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Affiliation(s)
- Michal Hammel
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - John A Tainer
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California, USA.,Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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10
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Identification and functional analysis of cadmium-binding protein in the visceral mass of Crassostrea gigas. Sci Rep 2021; 11:11306. [PMID: 34050239 PMCID: PMC8163822 DOI: 10.1038/s41598-021-90882-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 05/18/2021] [Indexed: 02/05/2023] Open
Abstract
The Pacific oyster, Crassostrea gigas, is a traditional food worldwide. The soft body of the oyster can easily accumulate heavy metals such as cadmium (Cd). To clarify the molecular mechanism of Cd accumulation in the viscera of C. gigas, we identified Cd-binding proteins. 5,10,15,20-Tetraphenyl-21H,23H-porphinetetrasulfonic acid, disulfuric acid, tetrahydrate, and Cd-binding competition experiments using immobilized metal ion affinity chromatography revealed the binding of water-soluble high molecular weight proteins to Cd, including C. gigas protein disulfide isomerase (cgPDI). Liquid chromatography-tandem mass spectrometry (LC-MS/MS) analyses revealed two CGHC motifs in cgPDI. The binding between Cd and rcgPDI was confirmed through a Cd-binding experiment using the TPPS method. Isothermal titration calorimetry (ITC) revealed the binding of two Cd ions to one molecule of rcgPDI. Circular dichroism (CD) spectrum and tryptophan fluorescence analyses demonstrated that the rcgPDI bound to Cd. The binding markedly changed the two-dimensional or three-dimensional structures. The activity of rcgPDI measured by a PDI Activity Assay Kit was more affected by the addition of Cd than by human PDI. Immunological analyses indicated that C. gigas contained cgPDI at a concentration of 1.0 nmol/g (viscera wet weight). The combination of ITC and quantification results revealed that Cd-binding to cgPDI accounted for 20% of the total bound Cd in the visceral mass. The findings provide new insights into the defense mechanisms of invertebrates against Cd.
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11
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Mani R, Rose S, Suresh A, Sambantham S, Anandan B, Ibrahim M, Meena B. Cellular alterations and damage to the renal tissue of marine catfish Arius arius following Cd exposure and the possible sequestrant role of Metallothionein. MARINE POLLUTION BULLETIN 2021; 163:111930. [PMID: 33373888 DOI: 10.1016/j.marpolbul.2020.111930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 06/12/2023]
Abstract
Cd is a non-degradable heavy metal pollutant with no known biological role. When taken up by living organisms from the environment, it causes extensive tissue damage. Here, we studied the effects of exposure to 20 mg/L-1CdCl2for 0, 24, 48, and 72 h on the renal tissue of marine catfish Arius arius. Cd uptake, metallothionein (MT) induction, microarchitectural alterations, DNA fragmentation, and caspase-3 activity were studied. Cd and MT levels were time-dependent and positively correlated. The diameter of the Bowman's capsule and tubules was significantly increased. Meanwhile, the density, diameter, and volume of the glomerulus as well as the density and volume of tubules decreased. Cd induced apoptosis though elevatedcaspase-3 activity. These results support the notion that exposure to sublethal Cd levels induces oxidative stress, leading to structural and functional impairment of the kidneys. Cd uptake and MT induction can serve as useful environmental biomarkers.
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Affiliation(s)
- Ramalingam Mani
- Department of Biotechnology, St. Peter's University, Chennai 600 054, India; Department of Biochemistry and Cell Biology, Vision Research Foundation, Sankara Nethralaya, Chennai 600 006, India
| | - Sumit Rose
- Department of Zoology, Presidency College (Autonomous), Chennai 600 005, India
| | - Ayothi Suresh
- Department of Zoology, Presidency College (Autonomous), Chennai 600 005, India
| | | | | | - Muhammed Ibrahim
- Department of Anatomy, Dr. ALMPG IBMS, University of Madras, Chennai, Tamil Nadu, India
| | - Boominathan Meena
- Department of Zoology, Presidency College (Autonomous), Chennai 600 005, India.
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12
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Dai F, Luo G, Li Z, Wei X, Wang Z, Lin S, Tang C. Physiological and transcriptomic analyses of mulberry (Morus atropurpurea) response to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 205:111298. [PMID: 32950806 DOI: 10.1016/j.ecoenv.2020.111298] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/02/2020] [Accepted: 09/04/2020] [Indexed: 06/11/2023]
Abstract
Mulberry (Morus atropurpurea) is an economically important woody tree and has great potential for the remediation of heavy metals. To investigate how cadmium accumulates and its detoxification in mulberry, we assessed the physiological and transcriptomic effects of cadmium contamination and as well as its chemical forms and subcellular distribution. Cadmium significantly inhibited mulberry plant growth and primarily accumulated in mulberry roots. Antioxidant enzymes were induced by cadmium in all tissues of mulberry. Subcellular fractionation analyses of cadmium indicated that the majority was compartmentalized in soluble fraction in roots while it mainly located in cell wall in leaves and stems. The greatest amount of the cadmium was integrated with proteins and pectates in all mulberry tissues. RNA-seq transcriptomic analyses of mulberry roots revealed that various metabolic pathways involved in cadmium stress response such as RNA regulation, hormone metabolism, and response to stress, secondary metabolism, as well as signaling, protein metabolism, transport, and cell-wall metabolism. These results will increase our understanding of the molecular mechanisms of cadmium detoxification in mulberry and provide new insights into engineering woody plants for phytoremediation.
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Affiliation(s)
- Fanwei Dai
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Guoqing Luo
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhiyi Li
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xu Wei
- University of Florida, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Zhenjiang Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Sen Lin
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Cuiming Tang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China.
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Dai F, Luo G, Li Z, Wei X, Wang Z, Lin S, Tang C. Physiological and transcriptomic analyses of mulberry (Morus atropurpurea) response to cadmium stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020. [PMID: 32950806 DOI: 10.artn11129810.1016/j.ecoenv.2020.111298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Mulberry (Morus atropurpurea) is an economically important woody tree and has great potential for the remediation of heavy metals. To investigate how cadmium accumulates and its detoxification in mulberry, we assessed the physiological and transcriptomic effects of cadmium contamination and as well as its chemical forms and subcellular distribution. Cadmium significantly inhibited mulberry plant growth and primarily accumulated in mulberry roots. Antioxidant enzymes were induced by cadmium in all tissues of mulberry. Subcellular fractionation analyses of cadmium indicated that the majority was compartmentalized in soluble fraction in roots while it mainly located in cell wall in leaves and stems. The greatest amount of the cadmium was integrated with proteins and pectates in all mulberry tissues. RNA-seq transcriptomic analyses of mulberry roots revealed that various metabolic pathways involved in cadmium stress response such as RNA regulation, hormone metabolism, and response to stress, secondary metabolism, as well as signaling, protein metabolism, transport, and cell-wall metabolism. These results will increase our understanding of the molecular mechanisms of cadmium detoxification in mulberry and provide new insights into engineering woody plants for phytoremediation.
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Affiliation(s)
- Fanwei Dai
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Guoqing Luo
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Zhiyi Li
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Xu Wei
- University of Florida, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Zhenjiang Wang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China
| | - Sen Lin
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Cuiming Tang
- Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China; Key Laboratory of Urban Agriculture in South China, Ministry of Agriculture, Guangzhou, China.
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Kadiene EU, Ouddane B, Gong HY, Kim MS, Lee JS, Pan YJ, Hwang JS, Souissi S. Differential gene expression profile of male and female copepods in response to cadmium exposure. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 204:111048. [PMID: 32758697 DOI: 10.1016/j.ecoenv.2020.111048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 06/11/2023]
Abstract
In this study, the whole transcriptome and sex-specific differential gene expression of the copepod Pseudodiaptomus annandalei exposed to cadmium (Cd) were investigated. P. annandalei were exposed to 40 μg/L Cd from the naupliar stage to male and female adults. High-throughput transcriptome sequencing (RNA-seq) was performed with copepod samples using an Illumina Hiseq™ 2000 platform. TransDecoder analysis found 32,625 putative open reading frame contigs. At p-values of <0.001, a total of 4756 differentially expressed genes (DEGs) (2216 up-regulated and 2540 down-regulated genes) were found in male copepods. Whereas a total of 2879 DEGs (2007 up-regulated and 872 down-regulated genes) were found in female copepods. A few selected cellular stress response genes, involved in xenobiotic metabolism, energy metabolism, growth, and development as a result of Cd exposure in the copepods were discussed. The study showed that most of these processes were changed in a sex-specific manner, accounting for the different sensitivities of male and female copepods. Results suggest and reinforce that sex is an important factor to be considered in ecotoxicogenomics.
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Affiliation(s)
- Esther U Kadiene
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, F-59000, Lille, France; Institute of Marine Biology, National Taiwan Ocean University, 20224, Keelung, Taiwan
| | - Baghdad Ouddane
- Université de Lille, Equipe Physico-Chimie de L'Environnement, Laboratoire LASIR UMR CNRS 8516, 59655, Villeneuve D'Ascq Cedex, France
| | - Hong-Yi Gong
- Department of Aquaculture, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Min-Sub Kim
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Yen-Ju Pan
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, F-59000, Lille, France; Department of Aquaculture, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Jiang-Shiou Hwang
- Institute of Marine Biology, National Taiwan Ocean University, 20224, Keelung, Taiwan; Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan.
| | - Sami Souissi
- Univ. Lille, CNRS, Univ. Littoral Côte D'Opale, UMR 8187 - LOG - Laboratoire D'Océanologie et de Géosciences, F-59000, Lille, France.
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Suitability of a Cellulose-Based Nanomaterial for the Remediation of Heavy Metal Contaminated Freshwaters: A Case-Study Showing the Recovery of Cadmium Induced DNA Integrity Loss, Cell Proliferation Increase, Nuclear Morphology and Chromosomal Alterations on Dreissena polymorpha. NANOMATERIALS 2020; 10:nano10091837. [PMID: 32938003 PMCID: PMC7558755 DOI: 10.3390/nano10091837] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/03/2020] [Accepted: 09/10/2020] [Indexed: 12/13/2022]
Abstract
The contamination of freshwaters by heavy metals represents a great problem, posing a threat for human and environmental health. Cadmium is classified as carcinogen to humans and its mechanism of carcinogenicity includes genotoxic events. In this study a recently developed eco-friendly cellulose-based nanosponge (CNS) was investigated as a candidate in freshwater nano-remediation process. For this purpose, CdCl2 (0.05 mg L−1) contaminated artificial freshwater (AFW) was treated with CNS (1.25 g L−1 for 2 h), and cellular responses were analyzed before and after CNS treatment in Dreissena polymorpha hemocytes. A control group (AFW) and a negative control group (CNS in AFW) were also tested. DNA primary damage was evaluated by Comet assay while chromosomal damage and cell proliferation were assessed by Cytome assay. AFW exposed to CNS did not cause any genotoxic effect in zebra mussel hemocytes. Moreover, DNA damage and cell proliferation induced by Cd(II) turned down to control level after 2 days when CNS were used. A reduction of Cd(II)-induced micronuclei and nuclear abnormalities was also observed. CNS was thus found to be a safe and effective candidate in cadmium remediation process being efficient in metal sequestering, restoring cellular damage exerted by Cd(II) exposure, without altering cellular physiological activity.
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Shi Y, Gaurab P, Wang W, Yan J, Sun Z, Zhang Y, Liu J, Liu X, Zheng D. Interaction effect of polycyclic aromatic hydrocarbon metabolites and cadmium on semen quality in nonsmokers. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:33990-33997. [PMID: 32557064 DOI: 10.1007/s11356-020-09617-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Both cadmium (Cd) and polycyclic aromatic hydrocarbons (PAHs) are known reproductive toxicants, but their co-exposure and interaction effect on semen quality particularly in nonsmokers remain unknown. We included 333 nonsmoking men and analyzed their urine and semen samples for heavy metals and PAH metabolites. Restricted cubic spline models were used to explore the dose-response relationship between each OH-PAHs, Cd, and semen quality parameters; the generalized linear model was performed to examine the interaction of each urinary OH-PAH metabolite and Cd concentration on semen quality. Also, stratified analysis was applied to further illustrate the independent effect of PAHs on semen quality parameters in low and high concentration Cd subgroups. The dose-response and interaction effect of PAHs and Cd on male semen quality was observed. Stratified analysis in the high concentration Cd subgroup showed a negative association of 1-OHPyr concentration with semen motility. Our findings indicate that Cd not only modifies the association between PAHs and semen quality but can also exacerbate the toxic effect of pyrene on semen quality parameters. However, further studies with larger samples are needed to confirm the findings.
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Affiliation(s)
- Yihao Shi
- MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Pokhrel Gaurab
- Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Wangcheng Wang
- MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Jianqiao Yan
- MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Zhongyang Sun
- MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Yucong Zhang
- Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Jihong Liu
- Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Xiaming Liu
- Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Dan Zheng
- MOE Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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17
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Lu Q, Zou X, Liu J, Liang Z, Shim H, Qiu R, Wang S. Inhibitory effects of metal ions on reductive dechlorination of polychlorinated biphenyls and perchloroethene in distinct organohalide-respiring bacteria. ENVIRONMENT INTERNATIONAL 2020; 135:105373. [PMID: 31841802 DOI: 10.1016/j.envint.2019.105373] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 11/27/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
Bioremediation of sites co-contaminated with organohalides and metal pollutants may have unsatisfactory performance, since metal ions can potentially inhibit organohalide respiration. To understand the detailed impact of metals on organohalide respiration, we tested the effects of four metal ions (i.e., Cu2+, Cd2+, Cr3+ and Pb2+), as well as their mixtures, on reductive dechlorination of perchloroethene (PCE) and polychlorinated biphenyls (PCBs) in three different cultures, including a pure culture of Dehalococcoides mccartyi CG1, a Dehalococcoides-containing microcosm and a Dehalococcoides-Geobacter coculture. Results showed that the inhibitive impact on organohalide respiration depended on both the type and concentration of metal ions. Interestingly, the metal ions might indirectly inhibit organohalide respiration through affecting non-dechlorinating populations in the Dehalococcoides-containing microcosm. Nonetheless, compared to the CG1 pure culture, the Dehalococcoides-containing microcosm had higher tolerance to the individual metal ions. In addition, no synergistic inhibition was observed for reductive dechlorination of PCE and PCBs in cultures amended with metal ion mixtures. These results provide insights into the impact of metal ions on organohalide respiration, which may be helpful for future in situ bioremediation of organohalide-metal co-contaminated sites.
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Affiliation(s)
- Qihong Lu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; Environmental Microbiome Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510275, China
| | - Xueqi Zou
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jinting Liu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Zhiwei Liang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Hojae Shim
- Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, 999078, Macau
| | - Rongliang Qiu
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China.
| | - Shanquan Wang
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China; Environmental Microbiome Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China.
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18
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Cadmium(II) complexes of a hydrazone ligand: Synthesis, characterization, DNA binding, cyto- and genotoxicity studies. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Chen R, Zhao X, Jiao J, Li Y, Wei M. Surface-Modified Biochar with Polydentate Binding Sites for the Removal of Cadmium. Int J Mol Sci 2019; 20:ijms20071775. [PMID: 30974840 PMCID: PMC6479704 DOI: 10.3390/ijms20071775] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/03/2019] [Accepted: 04/08/2019] [Indexed: 12/18/2022] Open
Abstract
In this study, a surface chemical-modified rice husk biochar with abundant amino groups and disulfide bonds for the removal of cadmium was prepared using cystamine dihydrochloride as a modification ligand and glutaraldehyde as a crosslinker. The biochars were characterized by Fourier transform infrared spectrometry (FTIR), elemental analysis, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), thermogravimetry analysis (TGA), and nitrogen sorption (BET) before and after modification. The adsorption properties of the modified biochars for Cd (II) were investigated in detail via adsorption isotherm models, adsorption kinetics models, and selective adsorption experiments. The surfaces of the cystamine-modified biochars with granular nanopolymers of sufficient functional groups of primary amine and disulfide linkage rendered the biochar surface more conducive to electrostatic attraction and surface complexation. The theoretical maximum adsorption capacity of the modified biochars (81.02 mg g-1) was almost 10-fold greater than that of the raw biochars (8.347 mg g-1) for Cd (II). Besides, the cystamine-modified biochars had a better affinity for Cd (II) compared to other heavy metals (Zn, As, Cd, Co, Ni, Cr), showing six-fold greater affinity for Cd (II) than Zn2+. The results of this study indicate that the modification of biochars derived from rice husks shows great potential in the removal of Cd (II) from contaminated water.
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Affiliation(s)
- Rongqi Chen
- College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an 271018, Shandong, China.
| | - Xi Zhao
- Ji'nan Academy of Agricultural Sciences, Ji'nan 250316, Shandong, China.
| | - Juan Jiao
- College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an 271018, Shandong, China.
| | - Yan Li
- College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an 271018, Shandong, China.
- State Key Laboratory of Crop Biology (Shandong Collaborative), Tai'an 271018, Shandong, China.
- Innovation Center of Fruit & Vegetable Quality and Efficient Production, Tai'an 271018, Shandong, China.
- Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Tai'an 271018, Shandong, China.
| | - Min Wei
- College of Horticultural Science and Engineering, Shandong Agricultural University, Tai'an 271018, Shandong, China.
- State Key Laboratory of Crop Biology (Shandong Collaborative), Tai'an 271018, Shandong, China.
- Innovation Center of Fruit & Vegetable Quality and Efficient Production, Tai'an 271018, Shandong, China.
- Scientific Observing and Experimental Station of Environment Controlled Agricultural Engineering in Huang-Huai-Hai Region, Ministry of Agriculture, Tai'an 271018, Shandong, China.
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The mutagen and carcinogen cadmium is a high-affinity inhibitor of the zinc-dependent MutLα endonuclease. Proc Natl Acad Sci U S A 2018; 115:7314-7319. [PMID: 29941579 PMCID: PMC6048502 DOI: 10.1073/pnas.1807319115] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
MutLα (MLH1-PMS2 heterodimer) is an endonuclease that acts during an early step of eukaryotic mismatch repair. We show that human MutLα endonuclease copurifies with two equivalents of bound zinc, at least one of which resides within the endonuclease active site. We also show that cadmium, a known inhibitor of zinc-dependent enzymes and a potent mutagen and carcinogen, is a high-affinity inhibitor of MutLα endonuclease and that exogenous MutLα significantly reverses the mismatch repair defect in cadmium-treated human cell nuclear extract or nuclear extract prepared from cadmium-treated cells. Because the mutagenic action of cadmium is largely due to the selective inhibition of mismatch repair, these findings suggest that MutLα is a primary cadmium target for mutagenesis and presumably, carcinogenesis as well. MutLα (MLH1-PMS2 heterodimer), which acts as a strand-directed endonuclease during the initiation of eukaryotic mismatch repair, has been postulated to function as a zinc-dependent enzyme [Kosinski J, Plotz G, Guarné A, Bujnicki JM, Friedhoff P (2008) J Mol Biol 382:610–627]. We show that human MutLα copurifies with two bound zinc ions, at least one of which resides within the endonuclease active site, and that bound zinc is required for endonuclease function. Mutagenic action of the carcinogen cadmium, a known inhibitor of zinc-dependent enzymes, is largely due to selective inhibition of mismatch repair [Jin YH, et al. (2003) Nat Genet 34:326–329]. We show that cadmium is a potent inhibitor (apparent Ki ∼ 200 nM) of MutLα endonuclease and that cadmium inhibition is reversed by zinc. We also show that inhibition of mismatch repair in cadmium-treated nuclear extract is significantly reversed by exogenous MutLα but not by MutSα (MSH2-MSH6 heterodimer) and that MutLα reversal depends on integrity of the endonuclease active site. Exogenous MutLα also partially rescues the mismatch repair defect in nuclear extract prepared from cells exposed to cadmium. These findings indicate that targeted inhibition of MutLα endonuclease contributes to cadmium inhibition of mismatch repair. This effect may play a role in the mechanism of cadmium carcinogenesis.
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Bakti F, Sasse C, Heinekamp T, Pócsi I, Braus GH. Heavy Metal-Induced Expression of PcaA Provides Cadmium Tolerance to Aspergillus fumigatus and Supports Its Virulence in the Galleria mellonella Model. Front Microbiol 2018; 9:744. [PMID: 29706948 PMCID: PMC5909057 DOI: 10.3389/fmicb.2018.00744] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/29/2018] [Indexed: 11/23/2022] Open
Abstract
Most of the metal transporters in Aspergillus fumigatus are yet uncharacterized. Their role in fungal metabolism and virulence remains unclear. This paper describes the novel PIB-type cation ATPase PcaA, which links metal homeostasis and heavy metal tolerance in the opportunistic human pathogen A. fumigatus. The protein possesses conserved ATPase motif and shares 51% amino acid sequence identity with the Saccharomyces cerevisiae cadmium exporter Pca1p. A pcaA deletion, an overexpression and a gfp-pcaA complementation strain of A. fumigatus were constructed and their heavy metal susceptibilities were studied. The pcaA knock out strain showed drastically decreased cadmium tolerance, however, its growth was not affected by the exposure to high concentrations of copper, iron, zinc, or silver ions. Although the lack of PcaA had no effect on copper adaption, we demonstrated that not only cadmium but also copper ions are able to induce the transcription of pcaA in A. fumigatus wild type Af293. Similarly, cadmium and copper ions could induce the copper exporting ATPase crpA. These data imply a general response on the transcriptomic level to heavy metals in A. fumigatus through the induction of detoxification systems. Confocal microscopy of the gfp-pcaA complementation strain expressing functional GFP-PcaA supports the predicted membrane localization of PcaA. The GFP-PcaA fusion protein is located in the plasma membrane of A. fumigatus in the presence of cadmium ions. Virulence assays support a function of PcaA for virulence of A. fumigatus in the Galleria mellonella wax moth larvae model, which might be linked to the elimination of reactive oxygen species.
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Affiliation(s)
- Fruzsina Bakti
- Institute for Microbiology and Genetics, Department of Molecular Microbiology and Genetics, Goettingen Center for Molecular Biosciences, University of Göttingen, Göttingen, Germany.,Department of Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Christoph Sasse
- Institute for Microbiology and Genetics, Department of Molecular Microbiology and Genetics, Goettingen Center for Molecular Biosciences, University of Göttingen, Göttingen, Germany
| | - Thorsten Heinekamp
- Department of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute, Jena, Germany
| | - István Pócsi
- Department of Biotechnology and Microbiology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Gerhard H Braus
- Institute for Microbiology and Genetics, Department of Molecular Microbiology and Genetics, Goettingen Center for Molecular Biosciences, University of Göttingen, Göttingen, Germany
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22
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Eftekhari-Sis B, Malekan F, Younesi Araghi H. CdSe quantum dots capped with p-nitrophenyldiazenylphenyloxadiazole: a nanosensor for Cd2+ ions in aqueous media. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0478] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A nanosensor based on p-nitrophenyldiazenylphenyloxadiazole (NDPO) capped CdSe quantum dots (QDs) was developed for Cd2+ ions in aqueous solutions. The nanosensor exhibited a high selectivity for cadmium ions and showed linear correlation with Cd2+ ions concentration in the range of 0.05–1.0 mmol/L. The prepared NDPO capped CdSe QDs were characterized by TEM, SEM, EDX, and FTIR techniques.
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Affiliation(s)
- Bagher Eftekhari-Sis
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
| | - Fatemeh Malekan
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
| | - Hessamaddin Younesi Araghi
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
- Department of Chemistry, University of Maragheh, Maragheh 55181-83111, Iran
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23
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Surface Engineered Magnetic Biosorbents for Water Treatment. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2018. [DOI: 10.1007/978-3-319-92111-2_9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Kumar S, Sharma RP, Venugopalan P, Aree T. Synthesis, characterization and single crystal X-ray structure determination of three cadmium(II) complexes derived from picric acid and p-nitrobenzoic acid in the presence and absence of nitrogen donor ligand N-(hydroxyethyl)ethylenediamine. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.09.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ubani-Rex OA, Saliu JK, Bello TH. Biochemical Effects of the Toxic Interaction of Copper, Lead and Cadmium on Clarias gariepinus. J Health Pollut 2017; 7:38-48. [PMID: 30524839 PMCID: PMC6221451 DOI: 10.5696/2156-9614-7.16.38] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 10/18/2017] [Indexed: 04/18/2023]
Abstract
BACKGROUND The presence of heavy metals in the aquatic environment is a concern because of potential toxicity and threats to plant and animal life. OBJECTIVE The present study evaluated the joint action toxicity and biochemical effects of sublethal concentrations of copper (Cu), lead (Pb) and cadmium (Cd) against Clarias gariepinus over a period of 28 days. METHODS We procured fingerlings (weight: 5-8 g; length: 4.5-6.0 cm) and juveniles (weight: 20-25 g; length: 14.5-17.5 cm) from a commercial fish farm in Bariga, Lagos state, Nigeria. Test toxicants were selected from the analyzed heavy metals in the field based on their deviation from World Health Organization, Federal Environmental Protection Agency and United States Environmental Protection Agency standards. Fish were randomly loaded into a 4-L glass aquaria for the bioassay per toxicant concentration of two replicates and untreated control (dechlorinated tap water). RESULTS The derived 96 hour lethal concentration 50 (LC50) value of Cu (2.11 mg/L) was the most toxic followed by Cd (24.18 mg/L) and Pb (34.48 mg/L), which was the least toxic of the singly tested pollutants. The analysis of dose-response data of the joint action toxicity of Cu and Cd, and Cu and Pb determined 96 hour LC50 values of 1.804 mg/L and 2.15 mg/L, respectively. The interactions between the mixture of Cu:Cd conformed with the model of synergism (synergistic ratio (SR)>1 and relative toxic units (RTU)>1), while the interaction between Cu:Pb was found to be antagonistic (SR<1), with an SR value of 0.98. The biochemical effects study revealed that malondialdehyde (MDA) levels decreased significantly (P<0.05) in the exposed fish, reduced glutathione was not significant at (P<0.05), and levels of superoxide dismutase (SOD), catalase, glucose and cholesterol were significantly different (P<0.05). DISCUSSION The observed increased in the glutathione level in the Cu:Cd mixture and a corresponding decrease in MDA concentration in the liver of test animals revealed the ability of fish to overcome the effects of lipid peroxidation in this group because the Cu ion is displaced by Cd, and the fish were able to catalyze the breakdown of hydrogen peroxide via the Fenton reaction. CONCLUSIONS Further studies on the joint action toxicity of heavy metals are needed in order to further determine their concentration in the local environment. ETHICS APPROVAL Study protocols were approved by the Health Research Ethics Committee of the University of Lagos.
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Affiliation(s)
| | - Joseph Kayode Saliu
- Ecotoxicology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria
| | - Taiwo Hassan Bello
- Ecotoxicology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria
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Paswan S, Bharty M, Chaudhari U, Chaurasia R, Butcher R, Jasinski J. Syntheses, spectral and structural characterization of Cd(II) complexes of 5-(thiophen-2-yl)-1,3,4-oxadiazole-2-thione, 2-thiohydantoin and 2-thenoyltrifluoroacetone. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Qayyum MA, Shah MH. Study of trace metal imbalances in the blood, scalp hair and nails of oral cancer patients from Pakistan. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 593-594:191-201. [PMID: 28343039 DOI: 10.1016/j.scitotenv.2017.03.169] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 03/17/2017] [Accepted: 03/18/2017] [Indexed: 06/06/2023]
Abstract
Oral cancer is an important cause of cancer morbidity and mortality globally and exposure to trace metals alongside tobacco, alcohol and HPV are the important etiological factors in its development. Selected essential and toxic trace metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were measured in the blood, scalp hair and nails of oral cancer patients and counterpart controls by atomic absorption spectrometry. Mean concentrations of Cd, Ni and Pb were found to be significantly higher (p<0.05) and those of Cu, Fe and Zn were considerably lower in the blood, scalp hair and nails of the patients than the controls. Most of the metal concentrations exhibited higher dispersion and asymmetry in the blood, scalp hair and nails of the patients compared with the controls. The correlation study revealed significantly diverse relationships among the metals in blood, scalp hair and nails of both donor groups. Variations in the metal levels were also noted for various stages (I, II, III & IV) as well as the types (adenocarcinoma and squamous cell carcinoma) of oral cancer. Multivariate cluster analysis of the metal levels in the patients were also significantly dissimilar than the controls. The study evidenced considerably divergent variations in the metal levels in oral cancer patients in comparison with the controls.
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Affiliation(s)
| | - Munir H Shah
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.
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Osman W, Shonouda M. X-ray metal assessment and ovarian ultrastructure alterations of the beetle, Blaps polycresta (Coleoptera, Tenebrionidae), inhabiting polluted soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:14867-14876. [PMID: 28477258 DOI: 10.1007/s11356-017-9095-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 04/24/2017] [Indexed: 06/07/2023]
Abstract
X-ray analysis was applied to estimate the percentages of heavy metals in ovarian tissues of the tenebrionid beetle, Blaps polycresta. Calcium, phosphorus, sulfur, cadmium, copper, and zinc were the most common detected metals in ovaries of insects collected from reference and polluted sites. Only cadmium showed significantly higher percentages in the polluted ovaries compared with the reference ones. Ultrastructure investigation revealed severe alterations in polluted ovaries both in the tropharium and in the vitellarium. Contraction of nuclear membrane of trophocytes was observed; therefore, cavities and spaces appeared in the cytoplasm followed by nuclear pyknosis. In the vitellarium, fragmentation of chromatin materials in nuclei of the follicular cells was detected. The cytoplasm was poor in the rough endoplasmic reticulum and mitochondria. Damage of yolk bodies occurred in addition to break off in the layer of microvilli. Accumulation of electron-dense vesicles and multivesicular bodies were observed in both reference and polluted ovaries. These alterations in ovarian ultrastructure of B. polycresta show the severe impact of cadmium pollution on cell organelles of insects and could be used as an interesting tool for monitoring heavy metals inside the body organs due to soil pollution.
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Affiliation(s)
- Wafaa Osman
- Department of Zoology, Faculty of Science, Alexandria University, Alexandria, Egypt.
| | - Mourad Shonouda
- Department of Zoology, Faculty of Science, Alexandria University, Alexandria, Egypt
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Chalmers ZR, Connelly CF, Fabrizio D, Gay L, Ali SM, Ennis R, Schrock A, Campbell B, Shlien A, Chmielecki J, Huang F, He Y, Sun J, Tabori U, Kennedy M, Lieber DS, Roels S, White J, Otto GA, Ross JS, Garraway L, Miller VA, Stephens PJ, Frampton GM. Analysis of 100,000 human cancer genomes reveals the landscape of tumor mutational burden. Genome Med 2017; 9:34. [PMID: 28420421 PMCID: PMC5395719 DOI: 10.1186/s13073-017-0424-2] [Citation(s) in RCA: 2192] [Impact Index Per Article: 313.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 03/18/2017] [Indexed: 12/13/2022] Open
Abstract
Background High tumor mutational burden (TMB) is an emerging biomarker of sensitivity to immune checkpoint inhibitors and has been shown to be more significantly associated with response to PD-1 and PD-L1 blockade immunotherapy than PD-1 or PD-L1 expression, as measured by immunohistochemistry (IHC). The distribution of TMB and the subset of patients with high TMB has not been well characterized in the majority of cancer types. Methods In this study, we compare TMB measured by a targeted comprehensive genomic profiling (CGP) assay to TMB measured by exome sequencing and simulate the expected variance in TMB when sequencing less than the whole exome. We then describe the distribution of TMB across a diverse cohort of 100,000 cancer cases and test for association between somatic alterations and TMB in over 100 tumor types. Results We demonstrate that measurements of TMB from comprehensive genomic profiling are strongly reflective of measurements from whole exome sequencing and model that below 0.5 Mb the variance in measurement increases significantly. We find that a subset of patients exhibits high TMB across almost all types of cancer, including many rare tumor types, and characterize the relationship between high TMB and microsatellite instability status. We find that TMB increases significantly with age, showing a 2.4-fold difference between age 10 and age 90 years. Finally, we investigate the molecular basis of TMB and identify genes and mutations associated with TMB level. We identify a cluster of somatic mutations in the promoter of the gene PMS2, which occur in 10% of skin cancers and are highly associated with increased TMB. Conclusions These results show that a CGP assay targeting ~1.1 Mb of coding genome can accurately assess TMB compared with sequencing the whole exome. Using this method, we find that many disease types have a substantial portion of patients with high TMB who might benefit from immunotherapy. Finally, we identify novel, recurrent promoter mutations in PMS2, which may be another example of regulatory mutations contributing to tumorigenesis. Electronic supplementary material The online version of this article (doi:10.1186/s13073-017-0424-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | - David Fabrizio
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Laurie Gay
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Siraj M Ali
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Riley Ennis
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Alexa Schrock
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | | | - Adam Shlien
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | | | - Franklin Huang
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA
| | - Yuting He
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - James Sun
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Uri Tabori
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Mark Kennedy
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Daniel S Lieber
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Steven Roels
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Jared White
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Geoffrey A Otto
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Jeffrey S Ross
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
| | - Levi Garraway
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts, USA.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Vincent A Miller
- Foundation Medicine Inc., 150 Second St., Cambridge, MA, 02141, USA
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Khan N, Afridi HI, Kazi TG, Arain MB, Bilal M, Akhtar A, Khan M. Correlation of Cadmium and Magnesium in the Blood and Serum Samples of Smokers and Non-Smokers Chronic Leukemia Patients. Biol Trace Elem Res 2017; 176:81-88. [PMID: 27511371 DOI: 10.1007/s12011-016-0816-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 08/01/2016] [Indexed: 12/13/2022]
Abstract
It was studied that cancer-causing processes are related with the disproportions of essential and toxic elements in body tissues and fluid. The purpose of the current study was to evaluate the levels of magnesium (Mg) and cadmium (Cd) in serum and blood samples of smokers and nonsmokers who have chronic myeloid (CML) and lymphocytic (CLL) leukemia, age ranged 31-50 years. For comparative study, age-matched smokers and nonsmoker males were chosen as controls/referents. The levels of elements in patient were analyzed before any treatment by atomic absorption spectrophotometer, after microwave assisted acid digestion. The validation of the method was done by using certified reference materials of serum and blood samples. The resulted data indicated that the adult male smokers and nonsmokers have two- to fourfold higher levels of Cd in the blood and sera samples as compared to the referents (p < 0.01), whereas two- to threefold lower levels of Mg was found in blood and serum samples of both types of leukemia patients as related to referent values. The resulted data indicates significant negative correlation among Mg and Cd in leukemia patients and smoker referents. Further studies are needed to clarify the role of these elements in pathogenesis of chronic leukemia.
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Affiliation(s)
- Noman Khan
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Hasan Imran Afridi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
| | - Tasneem Gul Kazi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Muhammad Balal Arain
- Department of Chemistry, Abdul Wali Khan University, Mardan 23200, Mardan, PK, 23200, Pakistan
| | - Muhammad Bilal
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Asma Akhtar
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
| | - Mustafa Khan
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan
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Skalny AV, Simashkova NV, Klyushnik TP, Grabeklis AR, Bjørklund G, Skalnaya MG, Nikonorov AA, Tinkov AA. Hair toxic and essential trace elements in children with autism spectrum disorder. Metab Brain Dis 2017; 32:195-202. [PMID: 27581303 DOI: 10.1007/s11011-016-9899-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/19/2016] [Indexed: 02/08/2023]
Abstract
The objective of the study was to investigate hair trace elements content in children suffering from autism spectrum disorder (ASD). A total of 74 ASD children and 74 sex- and age-matched controls divided into two age groups (2-4 and 5-9 years) were investigated. Hair trace elements content was assessed using inductively coupled plasma mass spectrometry. A general cohort of ASD children was characterized by 29 %, 41 %, and 24 % lower hair levels of chromium (Cr), iodine (I), and vanadium (V), respectively, whereas the level of selenium (Se) exceeded the respective control values by 31 %. In ASD children aged 2-4 years hair Cr, I and V content was 68 %, 36 % and 41 % lower than in the controls. Older ASD children were characterized by 45 % increase in hair Se levels. In a general cohort of ASD children hair beryllium (Be) and tin (Sn) levels were 50 % and 34 % lower than the control values. In the first age group (2-4 years) of ASD children 34 %, 42 %, and 73 % lower levels of arsenic (As), boron (B), and Be were detected. In the second age group of ASD children only a nearly significant 25 % decrease in hair lead (Pb) was detected. Surprisingly, no significant group difference in hair mercury (Hg), zinc (Zn), and copper (Cu) content was detected. Generally, the results of the present study demonstrate that children with ASD are characterized by lower values in hair of not only essential but also toxic trace elements.
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Affiliation(s)
- Anatoly V Skalny
- All-Russian Research Institute of Medicinal and Aromatic Plants, Moscow, Russia.
- Orenburg State University, Orenburg, Russia.
- Yaroslavl State University, Yaroslavl, Russia.
- RUDN University, Moscow, Russia.
| | - Natalia V Simashkova
- Scientific Center for Mental Health, Russian Academy of Medical Sciences, Moscow, Russia
| | - Tatiana P Klyushnik
- Scientific Center for Mental Health, Russian Academy of Medical Sciences, Moscow, Russia
| | | | - Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway
| | - Margarita G Skalnaya
- RUDN University, Moscow, Russia
- Russian Society of Trace Elements in Medicine, Moscow, Russia
| | - Alexandr A Nikonorov
- Orenburg State University, Orenburg, Russia
- Department of Biochemistry, Orenburg State Medical University, Orenburg, Russia
| | - Alexey A Tinkov
- Orenburg State University, Orenburg, Russia
- Yaroslavl State University, Yaroslavl, Russia
- RUDN University, Moscow, Russia
- Department of Biochemistry, Orenburg State Medical University, Orenburg, Russia
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Cuéllar-Cruz M, Lucio-Hernández D, Martínez-Ángeles I, Demitri N, Polentarutti M, Rosales-Hoz MJ, Moreno A. Biosynthesis of micro- and nanocrystals of Pb (II), Hg (II) and Cd (II) sulfides in four Candida species: a comparative study of in vivo and in vitro approaches. Microb Biotechnol 2017; 10:405-424. [PMID: 28093869 PMCID: PMC5328821 DOI: 10.1111/1751-7915.12485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Revised: 11/13/2016] [Accepted: 11/14/2016] [Indexed: 02/04/2023] Open
Abstract
Nature produces biominerals (biogenic minerals) that are synthesized as complex structures, in terms of their physicochemical properties. These biominerals are composed of minerals and biological macromolecules. They are produced by living organisms and are usually formed through a combination of chemical, biochemical and biophysical processes. Microorganisms like Candida in the presence of heavy metals can biomineralize those metals to form microcrystals (MCs) and nanocrystals (NCs). In this work, MCs and NCs of PbS, HgS or HgCl2 as well as CdS are synthesized both in vitro (gels) and in vivo by four Candida species. Our in vivo results show that, in the presence of Pb2+, Candida cells are able to replicate and form extracellular PbS MCs, whereas in the presence of Hg2+ and Cd2+, they did synthesize intercellular MCs from HgS or HgCl2 and CdS NCs respectively. The MCs and NCs biologically obtained in Candida were compared with those PbS, HgS and CdS crystals synthetically obtained in vitro through the gel method (grown either in agarose or in sodium metasilicate hydrogels). This is, to our knowledge, the first time that the biosynthesis of the various MCs and NCs (presented in several species of Candida) has been reported. This biosynthesis is differentially regulated in each of these pathogens, which allows them to adapt and survive in different physiological and environmental habitats.
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Affiliation(s)
- Mayra Cuéllar-Cruz
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, C.P. 36050, Guanajuato, México
| | - Daniela Lucio-Hernández
- Departamento de Biología, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Col. Noria Alta, C.P. 36050, Guanajuato, México
| | - Isabel Martínez-Ángeles
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, Ciudad de México, 04510, México
| | - Nicola Demitri
- Elettra - Sincrotone Trieste, S.S. 14 km 163.5 in Area Science Park, 34149, Basovizza - Trieste, Italy
| | - Maurizio Polentarutti
- Elettra - Sincrotone Trieste, S.S. 14 km 163.5 in Area Science Park, 34149, Basovizza - Trieste, Italy
| | - María J Rosales-Hoz
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del I.P.N., Apdo. Postal 14-740, 07000, México, D.F, México
| | - Abel Moreno
- Departamento de Química de Biomacromoléculas, Instituto de Química, Universidad Nacional Autónoma de México, Av. Universidad 3000, Ciudad Universitaria, Ciudad de México, 04510, México
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Sheng Y, Wang Y, Yang X, Zhang B, He X, Xu W, Huang K. Cadmium tolerant characteristic of a newly isolated Lactococcus lactis subsp. lactis. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 48:183-190. [PMID: 27816003 DOI: 10.1016/j.etap.2016.10.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
Environmental contamination caused by heavy metals poses a major threat to the wildlife and human health for their toxicity and intrinsically persistent nature. Some specific food grade bacteria have properties that enable them to eliminate heavy metals from food and water. Lactococcus lactis subsp. lactis, newly isolated from pickles, is a cadmium (Cd) tolerant bacteria. Cd resistant properties of the lactis was evaluated under different Cd stresses. Cd accumulation in different cellular parts was determined by ICP-MS and cell morphology changes were measured by SEM-EDS and TEM-EDS. In addition, functional groups associated with Cd resistance were detected by infrared spectroscopic analysis. The results indicated that Cd mainly accumulated in the cell surface structures including cytoderm and cytomembrane. Functional groups such as OH and NH2 in the cell surface played essential roles in Cd biosorption. The elements of O, P, S, and N of polysaccharide, membrane protein and phosphatidate in the cell surface structures might be responsible for Cd biosorption for their strong electronegativity. This study indicated that ultrastructural analysis can be a supplemental method to study heavy metal resistance mechanism of microorganism and the newly isolated lactococcus lactis subsp. lactis has great potential to be applied to decontamination of heavy metals.
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Affiliation(s)
- Yao Sheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Ying Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xuan Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Boyang Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaoyun He
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China.
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Sheng Y, Yang X, Lian Y, Zhang B, He X, Xu W, Huang K. Characterization of a cadmium resistance Lactococcus lactis subsp. lactis strain by antioxidant assays and proteome profiles methods. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2016; 46:286-291. [PMID: 27522548 DOI: 10.1016/j.etap.2016.08.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 08/03/2016] [Accepted: 08/04/2016] [Indexed: 05/28/2023]
Abstract
Heavy metal contamination poses a major threat to the environment and human health for their potential toxicity and non-biodegradable properties. At present, some probiotics bacteria are reported to have great potential to eliminate heavy metals from food and water. In this study, resistance properties of a newly isolated Lactococcus lactis subsp. lactis for cadmium were studied by antioxidant assays and proteomics analysis. Antioxidant capacity of this strain was significantly activated under cadmium stress indicated by Fenton reaction, DPPH assay, SOD assay and GSH assay. Intracellular antioxidant enzyme systems, such as superoxide dismutase, glutathione reductase and catalase were suggested to play vital roles in the activated antioxidant capacity. The up-regulated cadA was associated with the activated P-type ATPases that plays an important role in cadmium resistance. Proteomics analysis identified 12 over-expressed proteins under 50mg/L cadmium stress and these proteins are abundant in oxidative stress response and energy metabolism regulation, which were considered as consequences as cadmium resistance of the strain. Thus, the probiotics Lactococcus lactis subsp. lactis may resist cadmium stress through antioxidant approach and enhanced energy metabolism. The food grade lactis strain may be applied in metal decontamination in environment and food/feed.
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Affiliation(s)
- Yao Sheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xuan Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yuanyuan Lian
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Boyang Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Xiaoyun He
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Wentao Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China
| | - Kunlun Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China; The Supervision, Inspection and Testing Center of Genetically Modified Organisms, Ministry of Agriculture, Beijing 100083, China.
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Adamkovicova M, Toman R, Martiniakova M, Omelka R, Babosova R, Krajcovicova V, Grosskopf B, Massanyi P. Sperm motility and morphology changes in rats exposed to cadmium and diazinon. Reprod Biol Endocrinol 2016; 14:42. [PMID: 27503218 PMCID: PMC4977869 DOI: 10.1186/s12958-016-0177-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 07/28/2016] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Humans are ubiquitously exposed to multiple environmental contaminants. Consequences of combined action on the reproductive system remain unknown. This study aimed to assess single and joint effects of cadmium and diazinon exposure on sperm quality parameters. METHODS Male adult Wistar rats were randomized into 4 groups of ten animals each. Group A was used as a control, animals from group B were exposed to cadmium (30 mg/L), rats from group C were administered with diazinon (40 mg/L), and rats from group D were exposed simultaneously to cadmium (30 mg/L) and diazinon (40 mg/L) via drinking water for 90 days. Sperm morphology and motility were evaluated using a bright field microscope and a computer-assisted semen analysis. RESULTS The percentage of motile spermatozoa and morphologically normal sperm was markedly reduced in rats from the group B. Rats from the C group showed an increase in velocity parameters, amplitude of lateral head displacement, decrease in beat-cross frequency, and an increase in abnormal sperm morphology. Simultaneous coexposure to cadmium and diazinon increased distance and velocity parameters, and amplitude of lateral head displacement. Reductions were observed in straightness, linearity, wobble, and beat-cross frequency. The decreased normal sperm morphology rates were related to defects of the sperm tail. CONCLUSIONS Exposure to cadmium and diazinon at relatively low doses impairs sperm quality and can reduce male fertility. Cadmium and diazinon caused significant changes on sperm morphology with varying effects on motility patterns. These parameters were significantly higher in the group D as compared to the group C. The findings have important implications for reproductive risk assessment of combined exposures to multiple chemicals.
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Affiliation(s)
- Maria Adamkovicova
- Department of Botany and Genetics, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Robert Toman
- Department of Veterinary Disciplines, Slovak University of Agriculture, 949 76 Nitra, Slovakia
| | - Monika Martiniakova
- Department of Zoology and Anthropology, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Radoslav Omelka
- Department of Botany and Genetics, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Ramona Babosova
- Department of Zoology and Anthropology, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Vladimira Krajcovicova
- Department of Botany and Genetics, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Birgit Grosskopf
- Institute of Zoology and Anthropology, Georg-August University, 37 073 Göttingen, Germany
| | - Peter Massanyi
- Department of Animal Physiology, Slovak University of Agriculture, 949 76 Nitra, Slovakia
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Mechanistic insight into cadmium-induced inactivation of the Bloom protein. Sci Rep 2016; 6:26225. [PMID: 27194376 PMCID: PMC4872126 DOI: 10.1038/srep26225] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 04/25/2016] [Indexed: 11/08/2022] Open
Abstract
Cadmium is a toxic metal that inactivates DNA-repair proteins via multiple mechanisms, including zinc substitution. In this study, we investigated the effect of Cd(2+) on the Bloom protein (BLM), a DNA-repair helicase carrying a zinc-binding domain (ZBD) and playing a critical role to ensure genomic stability. One characteristics of BLM-deficient cells is the elevated rate of sister chromatid exchanges, a phenomenon that is also induced by Cd(2+). Here, we show that Cd(2+) strongly inhibits both ATPase and helicase activities of BLM. Cd(2+) primarily prevents BLM-DNA interaction via its binding to sulfhydryl groups of solvent-exposed cysteine residues and, concomitantly, promotes the formation of large BLM multimers/aggregates. In contrast to previously described Cd(2+) effects on other zinc-containing DNA-repair proteins, the ZBD appears to play a minor role in the Cd(2+)-mediated inhibition. While the Cd(2+)-dependent formation of inactive multimers and the defect of DNA-binding were fully reversible upon addition of EDTA, the inhibition of the DNA unwinding activity was not counteracted by EDTA, indicating another mechanism of inhibition by Cd(2+) relative to the targeting of a catalytic residue. Altogether, our results provide new clues for understanding the mechanism behind the ZBD-independent inactivation of BLM by Cd(2+) leading to accumulation of DNA double-strand breaks.
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Dynamic structures in DNA damage responses & cancer. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2016; 117:129-133. [PMID: 25934179 DOI: 10.1016/j.pbiomolbio.2015.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Manshian BB, Soenen SJ, Brown A, Hondow N, Wills J, Jenkins GJS, Doak SH. Genotoxic capacity of Cd/Se semiconductor quantum dots with differing surface chemistries. Mutagenesis 2015; 31:97-106. [PMID: 26275419 PMCID: PMC4696518 DOI: 10.1093/mutage/gev061] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Quantum dots (QD) have unique electronic and optical properties promoting biotechnological advances. However, our understanding of the toxicological structure–activity relationships remains limited. This study aimed to determine the biological impact of varying nanomaterial surface chemistry by assessing the interaction of QD with either a negative (carboxyl), neutral (hexadecylamine; HDA) or positive (amine) polymer coating with human lymphoblastoid TK6 cells. Following QD physico-chemical characterisation, cellular uptake was quantified by optical and electron microscopy. Cytotoxicity was evaluated and genotoxicity was characterised using the micronucleus assay (gross chromosomal damage) and the HPRT forward mutation assay (point mutagenicity). Cellular damage mechanisms were also explored, focusing on oxidative stress and mitochondrial damage. Cell uptake, cytotoxicity and genotoxicity were found to be dependent on QD surface chemistry. Carboxyl-QD demonstrated the smallest agglomerate size and greatest cellular uptake, which correlated with a dose dependent increase in cytotoxicity and genotoxicity. Amine-QD induced minimal cellular damage, while HDA-QD promoted substantial induction of cell death and genotoxicity. However, HDA-QD were not internalised by the cells and the damage they caused was most likely due to free cadmium release caused by QD dissolution. Oxidative stress and induced mitochondrial reactive oxygen species were only partially associated with cytotoxicity and genotoxicity induced by the QD, hence were not the only mechanisms of importance. Colloidal stability, nanoparticle (NP) surface chemistry, cellular uptake levels and the intrinsic characteristics of the NPs are therefore critical parameters impacting genotoxicity induced by QD.
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Affiliation(s)
- Bella B Manshian
- Institute of Life Science, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK, Biomedical NMR Unit-MoSAIC, Department of Medicine, KU Leuven, B-3000 Leuven, Belgium and
| | - Stefaan J Soenen
- Biomedical NMR Unit-MoSAIC, Department of Medicine, KU Leuven, B-3000 Leuven, Belgium and
| | - Andy Brown
- Institute for Materials Research, SCaPE, University of Leeds, Leeds LS2 9JT, UK
| | - Nicole Hondow
- Institute for Materials Research, SCaPE, University of Leeds, Leeds LS2 9JT, UK
| | - John Wills
- Institute of Life Science, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK
| | - Gareth J S Jenkins
- Institute of Life Science, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK
| | - Shareen H Doak
- Institute of Life Science, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK,
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Fuss JO, Tsai CL, Ishida JP, Tainer JA. Emerging critical roles of Fe-S clusters in DNA replication and repair. BIOCHIMICA ET BIOPHYSICA ACTA 2015; 1853:1253-71. [PMID: 25655665 PMCID: PMC4576882 DOI: 10.1016/j.bbamcr.2015.01.018] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 01/13/2015] [Accepted: 01/26/2015] [Indexed: 10/24/2022]
Abstract
Fe-S clusters are partners in the origin of life that predate cells, acetyl-CoA metabolism, DNA, and the RNA world. The double helix solved the mystery of DNA replication by base pairing for accurate copying. Yet, for genome stability necessary to life, the double helix has equally important implications for damage repair. Here we examine striking advances that uncover Fe-S cluster roles both in copying the genetic sequence by DNA polymerases and in crucial repair processes for genome maintenance, as mutational defects cause cancer and degenerative disease. Moreover, we examine an exciting, controversial role for Fe-S clusters in a third element required for life - the long-range coordination and regulation of replication and repair events. By their ability to delocalize electrons over both Fe and S centers, Fe-S clusters have unbeatable features for protein conformational control and charge transfer via double-stranded DNA that may fundamentally transform our understanding of life, replication, and repair. This article is part of a Special Issue entitled: Fe/S proteins: Analysis, structure, function, biogenesis and diseases.
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Affiliation(s)
- Jill O Fuss
- Life Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
| | - Chi-Lin Tsai
- Life Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - Justin P Ishida
- Life Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
| | - John A Tainer
- Life Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; Department of Molecular and Cellular Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX 77030, USA.
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40
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Kazi TG, Wadhwa SK, Afridi HI, Talpur FN, Tuzen M, Baig JA. Comparison of essential and toxic elements in esophagus, lung, mouth and urinary bladder male cancer patients with related to controls. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:7705-7715. [PMID: 25548013 DOI: 10.1007/s11356-014-3988-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 12/12/2014] [Indexed: 06/04/2023]
Abstract
There is a compelling evidence in support of negative associations between essential trace and toxic elements in different types of cancer. The aim of the present study was to investigate the relationship between carcinogenic (As, Cd, Ni) and anti-carcinogenic (Se, Zn) trace elements in scalp hair samples of different male cancerous patients (esophagus, lung, mouth, and urinary bladder). For comparative purposes, the scalp hair samples of healthy males of the same age group (ranged 35-65 years) as controls were analyzed. Both controls and patients have the same socioeconomic status, localities, dietary habits, and smoking locally made cigarette. The scalp hair samples were oxidized by 65% nitric acid: 30% hydrogen peroxide (2:1) ratio in microwave oven followed by atomic absorption spectrometry. The validity and accuracy of the methodology were checked using certified reference material of human hair BCR 397. The mean concentrations of As, Cd, and Ni were found to be significantly higher in scalp hair samples of patients having different cancers as compared to the controls, while reverse results were obtained in the case of Se and Zn levels (p < 0.01). The study revealed that the carcinogenic processes are significantly affecting the trace elements burden and mutual interaction of essential trace and toxic elements in the cancerous patients.
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Affiliation(s)
- Tasneem Gul Kazi
- National Center of Excellence in Analytical Chemistry, University of Sindh, 76080, Jamshoro, Pakistan,
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41
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Jin W, Huang P, Wu F, Ma LH. Ultrasensitive colorimetric assay of cadmium ion based on silver nanoparticles functionalized with 5-sulfosalicylic acid for wide practical applications. Analyst 2015; 140:3507-13. [PMID: 25831211 DOI: 10.1039/c5an00230c] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Low-level cadmium ion (Cd(2+)) exposure contributes much toward the causation of chronic disease. Due to its low permissible exposure limit, overexposures may occur even in situations where trace quantities of Cd(2+) exist. So far, no effective treatment for Cd(2+) toxicity has been reported. Prevention of further exposure is the most important step in management of patients suggestive of Cd(2+) intoxication. Development of sensors for Cd(2+) is of great interest to ensure early diagnosis and improve management. We propose here a simple, low-cost (0.1$ per sample) yet very sensitive (limit of detection is 3.0 nM) and selective colorimetric assay for rapid (2 min) determination of Cd(2+) based on 5-sulfosalicylic acid functionalized silver nanoparticles (SAA-AgNPs). This method shows excellent selectivity for Cd(2+) over the other 16 metal ions. It is also precise and highly reproducible in determining Cd(2+) in real samples such as tap water, milk, serum, and urine with recoveries ranging from 93 to 110%, indicating the wide practical application to samples suspected of Cd(2+) exposure.
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Affiliation(s)
- Weiwei Jin
- Department of Chemistry, Nanchang University, Nanchang 330031, China.
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43
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Arain SS, Kazi TG, Afridi HI, Talpur FN, Kazi AG, Brahman KD, Panhwar AH, Arain MS. Scalp hair and blood cadmium levels in association with chewing gutkha, mainpuri, and snuff, among patients with oral cancer in Pakistan. J Oral Pathol Med 2014; 44:707-13. [DOI: 10.1111/jop.12283] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Sadaf Sadia Arain
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Tasneem Gul Kazi
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Hassan Imran Afridi
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Farah Naz Talpur
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Atif Gul Kazi
- Liaquat University of Medical and Health Sciences; Jamshoro Pakistan
| | - Kapil Dev Brahman
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Abdul Haleem Panhwar
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
| | - Mariam Shahzadi Arain
- National Center of Excellence in Analytical Chemistry; University of Sindh; Jamshoro Pakistan
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44
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Han G, Ferranco A, Feng X, Chen Z, Kraatz H. Synthesis, Characterization of Some Ferrocenoyl Cysteine and Histidine Conjugates, and Their Interactions with Some Metal Ions. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402470] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Guo‐Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, P. R. China, http://rsc.guet.edu.cn/RSC/public/show.aspx?par2=0014&par=864
| | - Annaleizle Ferranco
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario M1C 1A4, Canada, http://www.utsc.utoronto.ca/~bkraatz/
| | - Xiao‐Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, P. R. China, http://rsc.guet.edu.cn/RSC/public/show.aspx?par2=0014&par=864
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, P. R. China, http://rsc.guet.edu.cn/RSC/public/show.aspx?par2=0014&par=864
| | - Heinz‐Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario M1C 1A4, Canada, http://www.utsc.utoronto.ca/~bkraatz/
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45
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Feki-Tounsi M, Hamza-Chaffai A. Cadmium as a possible cause of bladder cancer: a review of accumulated evidence. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:10561-73. [PMID: 24894749 DOI: 10.1007/s11356-014-2970-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 04/23/2014] [Indexed: 05/16/2023]
Abstract
Bladder cancer is a significant disease, the rates of which have increased over the few last years. However, its etiology remains as yet undefined. Cadmium, a widespread environmental carcinogen that has received considerable interest, presents evidence as a possible cause of bladder cancer. A literature review was conducted from the years 1984-2013 to study the accumulated evidence for cadmium as a possible cause of bladder cancer, including routes of cadmium exposure, accumulation, toxicity, carcinogenicity, and evidence from epidemiological and experimental studies. Special reference is devoted to cadmium nephrotoxicity, which illustrates how cadmium exerts its effects on the transitional epithelium of the urinary tract. Mechanisms of carcinogenesis are discussed. The effects of cadmium on gene expression in urothelial cells exposed to cadmium are also addressed. Despite different methodologies, several epidemiologic and nephrotoxicity studies of cadmium indicate that occupational exposure to cadmium is associated with increased risk of bladder cancer and provide additional evidence that cadmium is a potential toxic element in urothelial cells. In vitro studies provide further evidence that cadmium is involved in urothelial carcinogenesis. Animal studies encounter several problems such as morphology differences between species. Among the complex mechanisms of cadmium carcinogenesis, gene expression deregulation is the subject of recent studies on bladder cadmium-induced carcinogenesis. Further research, however, will be required to promise a better understanding of the mechanisms underlying cadmium carcinogenesis and to establish the precise role of cadmium in this important malignancy.
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Affiliation(s)
- Molka Feki-Tounsi
- Unit of Marine and Environmental Toxicology, IPEIS, Sfax University, PB 805, 3018, Sfax, Tunisia,
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46
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Nwokocha CR, Younger-Coleman N, Nwokocha M, Owu DU, Iwuala M. Investigation of effects of time of measurement and modes of administration on cadmium accumulation in rat liver under some medicinal plants food supplemented diet. Pharmacognosy Res 2014; 6:240-5. [PMID: 25002805 PMCID: PMC4080505 DOI: 10.4103/0974-8490.132604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 01/05/2014] [Accepted: 05/16/2014] [Indexed: 11/30/2022] Open
Abstract
Context and Objectives: Cadmium (Cd) toxicity leads to cell and organ damage, we comparatively examined the protection ability of different medicinal plants on Cd liver accumulation following different treatment interventions and modes of administration. Materials and Methods: Rats were fed either 7% w/w Zingiber officinale, 7% w/w Allium Sativum, 10% w/w Lycopersicon esculentum, 5%, w/w Garcinia kola (all in rat chow), while Cd (200 ppm) was given in drinking water. Additives were administered together with (mode 1), a week after (mode 2) or a week before metal exposure (mode 3) for a period of six weeks. Cd liver was determined using AAS and compared using analysis of variance (ANOVA). Results: All additives significantly (P <0.5) reduced the accumulation of Cd in the liver. After adjusting for time and mode of administration, mean %protection for week 4 was significantly lower by 14.1% (P=0.02) from that for week 2 but the means did not differ with respect to additive used or mode of administration, no statistically significant interaction between modes of administration and either of additives used or time of administration in their respective relationships to percentage protection from Cd. Conclusion: Additives significantly reduced Cd accumulation through a reduction in absorption and enhancement of metal excretion.
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Affiliation(s)
- Chukwuemeka R Nwokocha
- Tropical Metabolism Research Institute, The University of the West Indies, Mona Campus, Kingston 7, Jamaica, West Indies
| | - Novie Younger-Coleman
- Tropical Metabolism Research Institute, The University of the West Indies, Mona Campus, Kingston 7, Jamaica, West Indies
| | - Magdalene Nwokocha
- Department of Basic Medical Sciences, The University of the West Indies, Mona Campus, Kingston 7, Jamaica, West Indies
| | - Daniel U Owu
- Department of Physiology, University of Calabar, Calabar, Cross River State, Nigeria
| | - Moses Iwuala
- Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
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García-Esquinas E, Pollan M, Tellez-Plaza M, Francesconi KA, Goessler W, Guallar E, Umans JG, Yeh J, Best LG, Navas-Acien A. Cadmium exposure and cancer mortality in a prospective cohort: the strong heart study. ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:363-70. [PMID: 24531129 PMCID: PMC3984227 DOI: 10.1289/ehp.1306587] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 12/10/2013] [Indexed: 05/05/2023]
Abstract
BACKGROUND Cadmium (Cd) is a toxic metal classified as a human carcinogen by the International Agency for Research on Cancer. OBJECTIVE We evaluated the association of long-term Cd exposure, as measured in urine, with cancer mortality in American Indians from Arizona, Oklahoma, and North and South Dakota who participated in the Strong Heart Study during 1989-1991. METHODS The Strong Heart Study was a prospective cohort study of 3,792 men and women 45-74 years of age who were followed for up to 20 years. Baseline urinary Cd (U-Cd) was measured using inductively coupled plasma mass spectrometry. We assessed cancer events by annual mortality surveillance. RESULTS The median (interquintile range) U-Cd concentration was 0.93 (0.55, 1.63) μg/g creatinine. After adjusting for sex, age, smoking status, cigarette pack-years, and body mass index, the adjusted hazard ratios (HRs) comparing the 80th versus the 20th percentiles of U-Cd were 1.30 (95% CI: 1.09, 1.55) for total cancer, 2.27 (95% CI: 1.58, 3.27) for lung cancer, and 2.40 (95% CI: 1.39, 4.17) for pancreatic cancer mortality. For all smoking-related cancers combined, the corresponding HR was 1.56 (95% CI: 1.24, 1.96). Cd was not significantly associated with liver, esophagus and stomach, colon and rectum, breast, prostate, kidney, or lymphatic and hematopoietic cancer mortality. On the basis of mediation analysis, we estimated that the percentage of lung cancer deaths due to tobacco smoking that could be attributed to Cd exposure was 9.0% (95% CI: 2.8, 21.8). CONCLUSIONS Low-to-moderate Cd exposure was prospectively associated with total cancer mortality and with mortality from cancers of the lung and pancreas. The implementation of population-based preventive measures to decrease Cd exposure could contribute to reducing the burden of cancer.
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48
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Liu D, Guo H, Chen Z, Wang Y. Effect of cadmium on the extracellular Na⁺, K⁺, and Ca²⁺ in the gill and small intestine of goldfish Carassius auratus. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:672-678. [PMID: 24583410 DOI: 10.1016/j.etap.2014.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 01/26/2014] [Accepted: 02/01/2014] [Indexed: 06/03/2023]
Abstract
In this study, the toxic effect of cadmium on extracellular Na(+), K(+), and Ca(2+) in the gill and small intestine of goldfish Carassius auratus was determined with the technique of ion chromatograph. Two-way ANOVA indicated that the two factors (Cd(2+) treatment and time) and the interaction factor had significant effect on the level of Na(+), K(+), and Ca(2+) in the small intestine and gill. 1.0 mg/L Cd(2+) significantly increased Ca(2+) level in the small intestine, but Ca(2+) level in the gill was significantly decreased by 1.0 and 5.0 mg/L Cd(2+) at 24, 48, and 72 h. Na(+) and K(+) level in the small intestine and gill was increased by 1.0 mg/L Cd(2+) at three time points, but increased by 5.0 mg/L Cd(2+) at a certain different time. In addition, Na(+) level was significantly decreased by 5.0 mg/L Cd(2+) at 24 or 48 h in the small intestine and gill. The results indicated that Cd(2+) played an important role in regulating the level of Na(+), K(+), and Ca(2+) in the small intestine and gill of goldfish C. auratus. A method was constructed to investigate the extracellular Na(+), K(+) and Ca(2+) in the tissues of gold fish with ion chromatography.
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Affiliation(s)
- Dongwu Liu
- School of Life Sciences, Shandong University of Technology, Zibo, Shandong Province 255049, China; Analysis and Testing Center, Shandong University of Technology, Zibo, Shandong Province 255049, China
| | - Hong Guo
- Analysis and Testing Center, Shandong University of Technology, Zibo, Shandong Province 255049, China
| | - Zhiwei Chen
- School of Life Sciences, Shandong University of Technology, Zibo, Shandong Province 255049, China.
| | - Ying Wang
- Analysis and Testing Center, Shandong University of Technology, Zibo, Shandong Province 255049, China
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Archaeal genome guardians give insights into eukaryotic DNA replication and damage response proteins. ARCHAEA-AN INTERNATIONAL MICROBIOLOGICAL JOURNAL 2014; 2014:206735. [PMID: 24701133 PMCID: PMC3950489 DOI: 10.1155/2014/206735] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 09/27/2013] [Accepted: 11/29/2013] [Indexed: 12/28/2022]
Abstract
As the third domain of life, archaea, like the eukarya and bacteria, must have robust DNA replication and repair complexes to ensure genome fidelity. Archaea moreover display a breadth of unique habitats and characteristics, and structural biologists increasingly appreciate these features. As archaea include extremophiles that can withstand diverse environmental stresses, they provide fundamental systems for understanding enzymes and pathways critical to genome integrity and stress responses. Such archaeal extremophiles provide critical data on the periodic table for life as well as on the biochemical, geochemical, and physical limitations to adaptive strategies allowing organisms to thrive under environmental stress relevant to determining the boundaries for life as we know it. Specifically, archaeal enzyme structures have informed the architecture and mechanisms of key DNA repair proteins and complexes. With added abilities to temperature-trap flexible complexes and reveal core domains of transient and dynamic complexes, these structures provide insights into mechanisms of maintaining genome integrity despite extreme environmental stress. The DNA damage response protein structures noted in this review therefore inform the basis for genome integrity in the face of environmental stress, with implications for all domains of life as well as for biomanufacturing, astrobiology, and medicine.
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Khairy M, El-Safty SA, Shenashen MA, Elshehy E. Simultaneous Detection and Removal of Cadmium Ions from Different Environmental Matrices. ACTA ACUST UNITED AC 2014. [DOI: 10.3370/lca.10.126] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Md. Khairy
- National Institute for Materials Science(NIMS)
| | - Sherif A. El-Safty
- National Institute for Materials Science(NIMS)
- Graduate School for Advanced Science and Engineering, Waseda University
| | | | - E. Elshehy
- National Institute for Materials Science(NIMS)
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