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Jiang H, Gao Y, Chen X, Wang B, Xu Z, Li Y, Sun X, Liu K, Divsalar A, Cheung E, Jiang L, Hong Y, Ding X. Single-Cell Study Unveils Lead Lifespan in Blood Cell Populations Follows a Universal Lognormal Distribution with Individual Skewness. Anal Chem 2024; 96:668-675. [PMID: 38176010 DOI: 10.1021/acs.analchem.3c03441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Lead is a widespread environmental hazard that can adversely affect multiple biological functions. Blood cells are the initial targets that face lead exposure. However, a systematic assessment of lead dynamics in blood cells at single-cell resolution is still absent. Herein, C57BL/6 mice were fed with lead-contaminated food. Peripheral blood was harvested at different days. Extracted red blood cells and leukocytes were stained with 19 metal-conjugated antibodies and analyzed by mass cytometry. We quantified the time-lapse lead levels in 12 major blood cell subpopulations and established the distribution of lead heterogeneity. Our results show that the lead levels in all major blood cell subtypes follow lognormal distributions but with distinctively individual skewness. The lognormal distribution suggests a multiplicative accumulation of lead with stochastic turnover of cells, which allows us to estimate the lead lifespan of different blood cell populations by calculating the distribution skewness. These findings suggest that lead accumulation by single blood cells follows a stochastic multiplicative process.
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Affiliation(s)
- Hui Jiang
- Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong226006, P.R. China
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Yingying Gao
- Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong226006, P.R. China
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Xiaoxiang Chen
- Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong226006, P.R. China
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Boqian Wang
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Zhixiao Xu
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Yiyang Li
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Xinyi Sun
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
| | - Kun Liu
- Department of Cardiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai200080, P.R. China
| | - Adeleh Divsalar
- Department of Cell & Molecular Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran15719-14911, Iran
| | - Edwin Cheung
- Cancer Centre, Centre for Precision Medicine Research and Training, Faculty of Health Sciences, University of Macau, Taipa999078, Macau SAR
| | - Lai Jiang
- Department of Anesthesiology and Surgical Intensive Care Unit, Xinhua Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200092, China
| | - Yifan Hong
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
- Institute of Molecular Physiology, Shenzhen Bay Laboratory, Shenzhen518132, P.R. China
| | - Xianting Ding
- Nantong First People's Hospital and Nantong Hospital of Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Nantong226006, P.R. China
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai200030, P.R. China
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Su Y, Du Y, Ye S, Jia G, Ding B, Yu J. Clinical importance and PI3K/Akt pathway-dependent anti-proliferative role of PALMD and DPT in breast cancer. Pathol Res Pract 2023; 249:154717. [PMID: 37556876 DOI: 10.1016/j.prp.2023.154717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 06/03/2023] [Accepted: 07/25/2023] [Indexed: 08/11/2023]
Abstract
This study aimed to identify novel differentially expressed genes in breast cancer and to explore the clinical value and the anti-tumor or oncogenic effects of the identified genes using bioinformatics analysis and in vitro experiments. The differentially expressed genes in breast cancer patients were identified using Gene Expression Omnibus (GEO) database with the cut-off criteria p < 0.05 and |logFC| > 1. The expression levels of palmdelphin (PALMD) and dermatopontin (DPT) in normal tissues and breast cancer tissues were evaluated based on GEPIA and UALCAN databases. PALMD and DPT expression levels in clinical subgroups of patients with breast cancer were analyzed to assess the association of PALMD and DPT expression with clinical characteristics. The prognostic and diagnostic values of PALMD and DPT in breast cancer were evaluated from Kaplan-Meier (K-M) survival curves and receiver operating characteristic (ROC) curves. Pearson's correlation coefficient was performed using LinkedOmics. KEGG pathway enrichment analysis was performed using DAVID. The protein levels were evaluated using western blot analysis. Cell proliferation was assessed using MTT and EdU assays. Two important genes, PALMD and DPT, were identified in breast cancer. The expression levels of PALMD and DPT were significantly lower in breast cancer tissues. The expression levels of PALMD were closely related to age, histological type, and T stage of breast cancer patients. The expression levels of DPT were closely related to age, histological type, T stage, N stage, estrogen receptor status, and progesterone receptor status of breast cancer patients. The K-M survival curves showed that PALMD or DPT was not an independent prognostic factor for breast cancer. The ROC curves showed that both PALMD and DPT had good diagnostic potential for breast cancer. KEGG pathway enrichment results showed that PI3K/Akt pathway was an important overlapping signaling for PALMD and DPT. Further studies proved that overexpression of PALMD and DPT inhibited proliferation in MCF-7 and MDA-MB-231 cells by suppressing the PI3K/Akt pathway. PALMD and DPT knockdown promoted proliferation in MCF-7 and MDA-MB-231 cells by activating the PI3K/Akt pathway. These results collectively suggested that PALMD and DPT might serve as potential diagnostic biomarkers and therapeutic targets for breast cancer.
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Affiliation(s)
- Yang Su
- Department of Thyroid and Breast Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China; Key Laboratory of Thyroid Tumor Prevention and Treatment of Nanyang, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China
| | - Yan Du
- Department of Thyroid and Breast Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China; Key Laboratory of Thyroid Tumor Prevention and Treatment of Nanyang, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China
| | - Shouwan Ye
- Department of Thyroid and Breast Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China; Key Laboratory of Thyroid Tumor Prevention and Treatment of Nanyang, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China
| | - Guangwei Jia
- Department of Thyroid and Breast Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China; Key Laboratory of Thyroid Tumor Prevention and Treatment of Nanyang, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China
| | - Bo Ding
- Department of General Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China
| | - Jinsong Yu
- Department of Thyroid and Breast Surgery, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China; Key Laboratory of Thyroid Tumor Prevention and Treatment of Nanyang, Nanyang First People's Hospital Affiliated to Henan University, Nanyang 473004, China.
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Hau RK, Wright SH, Cherrington NJ. In Vitro and In Vivo Models for Drug Transport Across the Blood-Testis Barrier. Drug Metab Dispos 2023; 51:1157-1168. [PMID: 37258305 PMCID: PMC10449102 DOI: 10.1124/dmd.123.001288] [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: 02/03/2023] [Revised: 05/10/2023] [Accepted: 05/25/2023] [Indexed: 06/02/2023] Open
Abstract
The blood-testis barrier (BTB) is a selectively permeable membrane barrier formed by adjacent Sertoli cells (SCs) in the seminiferous tubules of the testes that develops intercellular junctional complexes to protect developing germ cells from external pressures. However, due to this inherent defense mechanism, the seminiferous tubule lumen can act as a pharmacological sanctuary site for latent viruses (e.g., Ebola, Zika) and cancers (e.g., leukemia). Therefore, it is critical to identify and evaluate BTB carrier-mediated drug delivery pathways to successfully treat these viruses and cancers. Many drugs are unable to effectively cross cell membranes without assistance from carrier proteins like transporters because they are large, polar, and often carry a charge at physiologic pH. SCs express transporters that selectively permit endogenous compounds, such as carnitine or nucleosides, across the BTB to support normal physiologic activity, although reproductive toxicants can also use these pathways, thereby circumventing the BTB. Certain xenobiotics, including select cancer therapeutics, antivirals, contraceptives, and environmental toxicants, are known to accumulate within the male genital tract and cause testicular toxicity; however, the transport pathways by which these compounds circumvent the BTB are largely unknown. Consequently, there is a need to identify the clinically relevant BTB transport pathways in in vitro and in vivo BTB models that recapitulate human pharmacokinetics and pharmacodynamics for these xenobiotics. This review summarizes the various in vitro and in vivo models of the BTB reported in the literature and highlights the strengths and weaknesses of certain models for drug disposition studies. SIGNIFICANCE STATEMENT: Drug disposition to the testes is influenced by the physical, physiological, and immunological components of the blood-testis barrier (BTB). But many compounds are known to cross the BTB by transporters, resulting in pharmacological and/or toxicological effects in the testes. Therefore, models that assess drug transport across the human BTB must adequately account for these confounding factors. This review identifies and discusses the benefits and limitations of various in vitro and in vivo BTB models for preclinical drug disposition studies.
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Affiliation(s)
- Raymond K Hau
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
| | - Stephen H Wright
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
| | - Nathan J Cherrington
- College of Pharmacy, Department of Pharmacology & Toxicology, (R.K.H., N.J.C.) and College of Medicine, Department of Physiology, The University of Arizona, Tucson, Arizona (S.H.W.)
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Zhang X, Wang X, Li Y, Ning G, Zhang Q, Zhang X, Zheng W, Yang Z. Differences in adsorption, transmembrane transport and degradation of pyrene and benzo[a]pyrene by Bacillus sp. strain M1. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 248:114328. [PMID: 36436257 DOI: 10.1016/j.ecoenv.2022.114328] [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: 06/11/2022] [Revised: 11/02/2022] [Accepted: 11/21/2022] [Indexed: 06/16/2023]
Abstract
In a previous study our group identified Bacillus sp. strain M1 as an efficient decomposer of high molecular weight-polycyclic aromatic hydrocarbons (HMW-PAHs). Interestingly, its removal efficiency for benzo[a]pyrene (BaP) was nearly double that of pyrene (Pyr), which was the reverse of what is reported for most other species. Here we compared the differential steps of biosorption, transmembrane transport and biodegradation of Pyr and BaP by strain M1 in order to assist in targeted selection of dominant strains and their degradation efficiency in the remediation of these two HMW-PAHs. The overall biosorption efficiency for BaP was 19% higher than that for Pyr, and the time needed to reach BaP peak adsorption efficiency was 4 days shorter than for Pyr. Transmembrane transport of the PAHs was compared in presence of sodium azide which inhibits ATP synthesis and metabolism. This indicated that both Pyr and BaP entered the cells by the same means of passive transport. Biodegradation of Pyr and BaP did not differ in the early stage of culture, but around days 5-7, the biodegradation efficiency of BaP was significantly (30-61%) higher than that of Pyr. Key enzymes involved in these processes were identified and their activity differed, with intracellular gentisate 1,2-dioxygenase and extracellular polyphenol oxidase as likely candidates to be involved in BaP degradation, while intracellular catechol-1,2- dioxygenase and salicylate hydroxylase are more likely involved in Pyr degradation. These results provide new insights for sustainable environmental remediation of pyrene and benzo(a)pyrene by these bacteria.
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Affiliation(s)
- Xiaoxue Zhang
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Xiaomin Wang
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Yan Li
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Guohui Ning
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Qian Zhang
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Xuena Zhang
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China
| | - Wei Zheng
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China; State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071001, Hebei, PR China
| | - Zhixin Yang
- College of Resource and Environmental Sciences, Agricultural University of Hebei, Baoding 0710001, Hebei Province, PR China; Key Laboratory for Farmland Eco-Environment, Baoding 0710001, Hebei Province, PR China; State Key Laboratory of North China Crop Improvement and Regulation, Hebei Agricultural University, Baoding 071001, Hebei, PR China.
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Involvement of TauT/SLC6A6 in Taurine Transport at the Blood-Testis Barrier. Metabolites 2022; 12:metabo12010066. [PMID: 35050188 PMCID: PMC8782047 DOI: 10.3390/metabo12010066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/07/2022] [Accepted: 01/08/2022] [Indexed: 12/30/2022] Open
Abstract
Taurine transport was investigated at the blood–testis barrier (BTB) formed by Sertoli cells. An integration plot analysis of mice showed the apparent influx permeability clearance of [3H]taurine (27.7 μL/(min·g testis)), which was much higher than that of a non-permeable paracellular marker, suggesting blood-to-testis transport of taurine, which may involve a facilitative taurine transport system at the BTB. A mouse Sertoli cell line, TM4 cells, showed temperature- and concentration-dependent [3H]taurine uptake with a Km of 13.5 μM, suggesting that the influx transport of taurine at the BTB involves a carrier-mediated process. [3H]Taurine uptake by TM4 cells was significantly reduced by the substrates of taurine transporter (TauT/SLC6A6), such as β-alanine, hypotaurine, γ-aminobutyric acid (GABA), and guanidinoacetic acid (GAA), with no significant effect shown by L-alanine, probenecid, and L-leucine. In addition, the concentration-dependent inhibition of [3H]taurine uptake revealed an IC50 of 378 μM for GABA. Protein expression of TauT in the testis, seminiferous tubules, and TM4 cells was confirmed by Western blot analysis and immunohistochemistry by means of anti-TauT antibodies, and knockdown of TauT showed significantly decreased [3H]taurine uptake by TM4 cells. These results suggest the involvement of TauT in the transport of taurine at the BTB.
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Wu Z, Hu H, Wang C, Wu J, Xiong Y, Fu Y, Cheng X, Su H, Li P. Association between serum folate levels and blood concentrations of cadmium and lead in US adults. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:3565-3574. [PMID: 34392480 DOI: 10.1007/s11356-021-15767-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/28/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Folate may be involved in the detoxification of heavy metals. This has been demonstrated in animal studies, in in vivo and in vitro studies, and clinical evaluations. However, knowledge regarding the associations between serum folate and blood concentrations of cadmium and lead is limited. OBJECTIVE We aimed to investigate the relationship between serum folate levels and blood concentrations of cadmium and lead in US adults. METHODS Data on 15,501 adults were obtained from the 1999-2006 National Health and Nutrition Examination Survey (NHANES) and used for the analysis. Information on serum folate concentrations and blood levels of lead and cadmium was derived from laboratory measurements in the NHANES. Multivariable linear regression was used to examine the relationship between serum folate levels and blood concentrations of cadmium and lead in US adults, controlling for confounders. RESULTS The serum folate concentration was negatively correlated with blood levels of cadmium and lead (P-trends <0.01). When stratified by sex (male and female) and estimated glomerular filtration rate (eGFR ≤60 and >60 mL/min/1.73 m2), the association between serum folate concentrations and blood levels of cadmium and lead was found to be more stable in adults with eGFR > 60 mL/min/1.73 m2, both in males and females. SIGNIFICANCE These findings warrant future studies to explore the mechanisms responsible for the beneficial role of folate in regulating cadmium and lead concentrations in the blood.
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Affiliation(s)
- Zuxiang Wu
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Huan Hu
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Chenxi Wang
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Ji Wu
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Yurong Xiong
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Yang Fu
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Xiaoshu Cheng
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
- Center for Prevention and Treatment of Cardiovascular Diseases, the Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Hai Su
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Ping Li
- Department of Cardiology, the Second Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China.
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He H, Zhang Z, Li M. Association between serum folate concentrations and blood lead levels in adolescents: A cross-sectional study. Front Pediatr 2022; 10:941651. [PMID: 36389396 PMCID: PMC9641282 DOI: 10.3389/fped.2022.941651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 10/05/2022] [Indexed: 11/13/2022] Open
Abstract
As a heavy metal, lead is a common toxic agent. Its accumulation in the body is harmful to physical health, particularly in children and adolescents. Studies have reported that folate may play a protective role in lead exposure. An association between serum folate concentrations (SFC) and blood lead levels (BLL) has been documented in adults, but studies in adolescents are limited. This study investigated the relationship between SFC and BLL in American adolescents. This cross-sectional study collected relevant data on both SFC and BLL of 5,195 adolescents in the NHANES database from 2007 to 2018. Multivariable linear regressions and smooth curve fittings were adopted to evaluate the correlation between BLL and SFC. After adjusting potential confounders, we found negative relationships between BLL and SFC [β = -0.0041 (-0.0063, -0.0019)], and the associations were significant in non-Hispanic Whites, Mexican Americans, and other races but not significant in non-Hispanic blacks (P = 0.139). Furthermore, the negative trends were significant in adolescents aged 16-19 years and females aged 12-15 years but insignificant in males aged 12-15 years (P = 0.172). Therefore, these findings provide a basis for future research on the mechanism of folate in regulating blood lead levels.
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Affiliation(s)
- Huan He
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| | - Zhan Zhang
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
| | - Min Li
- Department of Ultrasound, Xi'an Children's Hospital, Xi'an, China
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Counteracting effects of heavy metals and antioxidants on male fertility. Biometals 2021; 34:439-491. [PMID: 33761043 DOI: 10.1007/s10534-021-00297-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/04/2021] [Indexed: 01/06/2023]
Abstract
Infertility is regarded as a global health problem affecting 8-12% of couples. Male factors are regarded as the main cause of infertility in 40% of infertile couples and contribute to this condition in combination with female factors in another 20% of cases. Abnormal sperm parameters such as oligospermia, asthenospermia, and teratozoospermia result in male factor infertility. Several studies have shown the deteriorative impact of heavy metals on sperm parameters and fertility in human subjects or animal models. Other studies have pointed to the role of antioxidants in counteracting the detrimental effects of heavy metals. In the currents study, we summarize the main outcomes of studies that assessed the counteracting impacts of heavy metal and antioxidants on male fertility. Based on the provided data from animal studies, it seems rational to administrate appropriate antioxidants in persons who suffer from abnormal sperm parameters and infertility due to exposure to toxic elements. Yet, further human studies are needed to approve the beneficial effects of these antioxidants.
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Huang SX, Fan WY, Wang L, Liu H, Wang X, Zhao H, Jiang WB. Maspin inhibits MCF-7 cell invasion and proliferation by downregulating miR-21 and increasing the expression of its target genes. Oncol Lett 2020; 19:2621-2628. [PMID: 32218812 PMCID: PMC7068223 DOI: 10.3892/ol.2020.11360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/03/2017] [Indexed: 11/30/2022] Open
Abstract
Maspin has been identified as a tumor suppressor gene in breast cancer, but the underlying regulatory mechanisms remain unclear. In the present study, maspin pcDNA was transfected into MCF-7 cells. microRNA (miR) microarray and reverse transcription-quantitative polymerase chain reaction was used for analysis; the results demonstrated that maspin may inhibit miR-10b, miR-21 and miR-451 expression in MCF-7 cells. In addition, maspin increased the expression of certain miR-21 target genes (phosphatase and tensin homolog, programmed cell death 4 and B-cell lymphoma-2), miR-10b target gene (Homeobox D10; HOXD10) and miR-451 target gene (multidrug resistance protein 1). Furthermore, the results of the present study revealed that decreased expression of miR-21 suppressed the invasion and proliferation of MCF-7 cells. Therefore, in the present study, it was hypothesized that as a tumor-suppressor gene, the potential molecular mechanism of maspin include down-regulating the expression of miR-21 and increasing the expression of specific miR-21 target genes.
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Affiliation(s)
- Shao-Xin Huang
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
| | - Wen-Yan Fan
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
| | - Ling Wang
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
| | - Hui Liu
- Clinical Skills Center, Clinical Medical College, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China
| | - Xin Wang
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
| | - Hao Zhao
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
| | - Wen-Bin Jiang
- Department of Social Science and Public Health, School of Basic Medical Science, Jiujiang University, Jiujiang, Jiangxi 332000, P.R. China.,Urban Agglomeration in The Middle Reaches of The Yangtze River and Nanchang-Jiujiang Development Research Center, Jiujiang, Jiangxi 3320005, P.R. China
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Exposure to Pb and Cd alters MCT4/CD147 expression and MCT4/CD147-dependent lactate transport in mice Sertoli cells cultured in vitro. Toxicol In Vitro 2019; 56:30-40. [PMID: 30615929 DOI: 10.1016/j.tiv.2019.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/28/2018] [Accepted: 01/03/2019] [Indexed: 12/22/2022]
Abstract
Sertoli cells (SCs) provide lactate as an energy substrate to develop germ cells during spermatogenesis. Lead (Pb) and cadmium (Cd) can induce SC toxicity. However, the mechanisms remain unclear. This study aimed to investigate the molecular mechanisms by which Pb and Cd alter lactate transport and production by SCs. Mouse SC line (15P-1 cells) were cultured in the absence and presence of lead acetate (PbAc, 1, 10, 20 and 30 μM) or cadmium chloride (CdCl2, 0.5, 5, 10 and 15 μM) for 24 h. The results showed that PbAc exposure significantly decreased lactate dehydrogenase (LDH) activity and mRNA level, intracellular and extracellular lactate, and MCT4 and CD147 protein levels but increased MCT4 and CD147 mRNA levels. However, PbAc did not alter the glucose uptake, glucose transporters 1 (GLUT1) and 3 (GLUT3) mRNA expression of SCs. Thus, PbAc mainly decreased lactate production by inhibiting LDH activity. In CdCl2-treated SCs, intracellular lactate content increased but extracellular lactate content decreased significantly, P < .05. The glucose uptake, LDH activity, and mRNA expression of GLUT1, GLUT3 and LDH, all significantly increased. But the mRNA and protein levels of MCT4 and CD147 significantly decreased. Moreover, the fluorescence intensity of co-localizations of the MCT4-CD147 complex dose-dependently decreased in the cell membrane. Thus, CdCl2 may reduce lactate export by suppressing MCT4 and CD147 expression. These results suggest that PbAc and CdCl2 disrupt lactate production and transport in mouse SCs by disturbing glycolysis or inhibiting MCT4-CD147 transporter expression and co-localizations.
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Orr SE, Barnes MC, George HS, Joshee L, Jeon B, Scircle A, Black O, Cizdziel J, Smith BE, Bridges CC. Exposure to mixtures of mercury, cadmium, lead, and arsenic alters the disposition of single metals in tissues of Wistar rats. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:1246-1256. [PMID: 30507365 PMCID: PMC6546563 DOI: 10.1080/15287394.2018.1551164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Humans throughout the world are exposed regularly to mixtures of environmental toxicants. Four of the most common heavy metal toxicants in the environment are mercury (Hg), cadmium (Cd), lead (Pb), and arsenic (As). Numerous studies have assessed the effects and disposition of individual metals in organ systems; however, humans are usually exposed to mixtures of toxicants or metals rather than to a single toxicant. Therefore, the purpose of the current study was to test the hypothesis that exposure to a mixture of toxic heavy metals alters the disposition of single metals in target organs. Wistar rats (Rattus norvegicus) were exposed to Hg, Cd, Pb, or As as a single metal or as a mixture of metals. Rats were injected intravenously for three days, following which kidneys, liver, brain, and blood were harvested. Samples were analyzed for content of Hg, Cd, Pb, and As via inductively coupled plasma mass spectrometry. In general, exposure to a mixture of metals reduced accumulation of single metals in target organs. Interestingly, exposure to mixtures of metals with Pb and/or As increased the concentration of these metals specifically in the liver. The findings from this study indicate that exposure to mixtures of toxic heavy metals may alter significantly the distribution and accumulation of these metals in target organs and tissues.
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Affiliation(s)
- Sarah E. Orr
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA USA
| | - Mary C. Barnes
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA USA
| | - Hannah S. George
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA USA
| | - Lucy Joshee
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA USA
| | - Byunggwon Jeon
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS USA
| | - Austin Scircle
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS USA
| | - Oscar Black
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS USA
| | - James Cizdziel
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS USA
| | - Betsy E. Smith
- Department of Internal Medicine, Mercer University School of Medicine, Macon, GA USA
| | - Christy C. Bridges
- Department of Biomedical Sciences, Mercer University School of Medicine, Macon, GA USA
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Ramos-Treviño J, Bassol-Mayagoitia S, Hernández-Ibarra JA, Ruiz-Flores P, Nava-Hernández MP. Toxic Effect of Cadmium, Lead, and Arsenic on the Sertoli Cell: Mechanisms of Damage Involved. DNA Cell Biol 2018; 37:600-608. [PMID: 29746152 DOI: 10.1089/dna.2017.4081] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Over the past decades, an increase has been described in exposure to environmental toxins; consequently, a series of studies has been carried out with the aim of identifying problems associated with health. One of the main risk factors is exposure to heavy metals. The adverse effects that these compounds exert on health are quite complex and difficult to elucidate, in that they act at different levels and there are various signaling pathways that are implicated in the mechanisms of damage. The Sertoli cells plays a role of vital importance during the process of spermatogenesis, and it has been identified as one of the principal targets of heavy metals. In the present review, cadmium, lead, and arsenic are broached as altering the physiology of the Sertoli cells, citing mechanisms that have been cited in the literature.
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Affiliation(s)
- Juan Ramos-Treviño
- 1 Department of Reproductive Biology, Biomedical Research Center, Faculty of Medicine, Autonomous University of Coahuila (UAdeC) , Torreón, Coahuila, Mexico
| | - Susana Bassol-Mayagoitia
- 1 Department of Reproductive Biology, Biomedical Research Center, Faculty of Medicine, Autonomous University of Coahuila (UAdeC) , Torreón, Coahuila, Mexico
| | - José Anselmo Hernández-Ibarra
- 1 Department of Reproductive Biology, Biomedical Research Center, Faculty of Medicine, Autonomous University of Coahuila (UAdeC) , Torreón, Coahuila, Mexico
| | - Pablo Ruiz-Flores
- 2 Department of Genetics and Molecular Medicine, Biomedical Research Center, Faculty of Medicine, Autonomous University of Coahuila (UAdeC) , Torreón, Coahuila, Mexico
| | - Martha P Nava-Hernández
- 1 Department of Reproductive Biology, Biomedical Research Center, Faculty of Medicine, Autonomous University of Coahuila (UAdeC) , Torreón, Coahuila, Mexico
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Impaired hypothalamic-pituitary-testicular axis activity, spermatogenesis, and sperm function promote infertility in males with lead poisoning. ZYGOTE 2017; 25:103-110. [PMID: 28185602 DOI: 10.1017/s0967199417000028] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Lead poisoning is a stealthy threat to human physiological systems as chronic exposure can remain asymptomatic for long periods of time before symptoms manifest. We presently review the biophysical mechanisms of lead poisoning that contribute to male infertility. Environmental and occupational exposure of lead may adversely affect the hypothalamic-pituitary-testicular axis, impairing the induction of spermatogenesis. Dysfunction at the reproductive axis, namely testosterone suppression, is most susceptible and irreversible during pubertal development. Lead poisoning also appears to directly impair the process of spermatogenesis itself as well as sperm function. Spermatogenesis issues may manifest as low sperm count and stem from reproductive axis dysfunction or testicular degeneration. Generation of excessive reactive oxygen species due to lead-associated oxidative stress can potentially affect sperm viability, motility, DNA fragmentation, membrane lipid peroxidation, capacitation, hyperactivation, acrosome reaction, and chemotaxis for sperm-oocyte fusion, all of which can contribute to deter fertilization. Reproductive toxicity has been tested through cross-sectional analysis studies in humans as well as in vivo and in vitro studies in animals.
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Liu X, Ye J, Wang L, Li Z, Zhang Y, Sun J, Du C, Wang C, Xu S. Protective Effects of PGC-1α Against Lead-Induced Oxidative Stress and Energy Metabolism Dysfunction in Testis Sertoli Cells. Biol Trace Elem Res 2017; 175:440-448. [PMID: 27392955 DOI: 10.1007/s12011-016-0799-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/04/2016] [Indexed: 12/06/2022]
Abstract
The reproductive system is sensitive to lead (Pb) toxicity, which has long been an area of research interest, but the underlying mechanisms remain to be illustrated. Peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) is pivotal in mitochondrial function. In this study, mouse testis Sertoli cells (TM4 cells), PGC-1α lower-expression (PGC-1α(-)) TM4 cells and PGC-1α overexpression (PGC-1α(+)) TM4 cells were used to explore the protective roles of PGC-1α against lead toxicity on the mouse reproductive system. Lead acetate (PbAc) exposure decreased the expression level of PGC-1α, increased the intracellular level of reactive oxygen species (ROS), and reduced the level of ATP in the three TM4 cell lines. The effects of PbAc on intracellular ATP level and on ROS content were significantly weakened in PGC-1α(+)TM4 cells versus TM4 cells and were significantly amplified in PGC-1α(-)TM4 cells versus TM4 cells. These results suggest that PGC-1α is a protective factor against PbAc-induced oxidative stress and energy metabolism dysfunction in the mouse reproductive system, thereby holding the potential of being developed as a preventive or therapeutic strategy against disorders induced by lead exposure.
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Affiliation(s)
- Xi Liu
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Jingping Ye
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
- Renmin hospital of Wuhan University, Wuhan, 430060, People's Republic of China
| | - Lu Wang
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Zhen Li
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Yucheng Zhang
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Jiantao Sun
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Chuang Du
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China
| | - Chunhong Wang
- Department of Toxicology, School of Public Health, Wuhan University, DongHu Road 115, Wuhan, 430071, People's Republic of China.
| | - Siyuan Xu
- Hubei Provincial Key Laboratory for Applied Toxicology, Hubei Provincial Academy for Preventive Medicine, Wuhan, 430079, People's Republic of China.
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An X, Sarmiento C, Tan T, Zhu H. Regulation of multidrug resistance by microRNAs in anti-cancer therapy. Acta Pharm Sin B 2017; 7:38-51. [PMID: 28119807 PMCID: PMC5237711 DOI: 10.1016/j.apsb.2016.09.002] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 05/30/2016] [Accepted: 07/06/2016] [Indexed: 12/31/2022] Open
Abstract
Multidrug resistance (MDR) remains a major clinical obstacle to successful cancer treatment. Although diverse mechanisms of MDR have been well elucidated, such as dysregulation of drugs transporters, defects of apoptosis and autophagy machinery, alterations of drug metabolism and drug targets, disrupti on of redox homeostasis, the exact mechanisms of MDR in a specific cancer patient and the cross-talk among these different mechanisms and how they are regulated are poorly understood. MicroRNAs (miRNAs) are a new class of small noncoding RNAs that could control the global activity of the cell by post-transcriptionally regulating a large variety of target genes and proteins expression. Accumulating evidence shows that miRNAs play a key regulatory role in MDR through modulating various drug resistant mechanisms mentioned above, thereby holding much promise for developing novel and more effective individualized therapies for cancer treatment. This review summarizes the various MDR mechanisms and mainly focuses on the role of miRNAs in regulating MDR in cancer treatment.
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Affiliation(s)
- Xin An
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Cesar Sarmiento
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Tao Tan
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Corresponding authors..
| | - Hua Zhu
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
- Corresponding authors..
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16
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Genetics of the human placenta: implications for toxicokinetics. Arch Toxicol 2016; 90:2563-2581. [DOI: 10.1007/s00204-016-1816-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/04/2016] [Indexed: 10/21/2022]
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17
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Li Z, Liu X, Wang L, Wang Y, Du C, Xu S, Zhang Y, Wang C, Yang C. The role of PGC-1α and MRP1 in lead-induced mitochondrial toxicity in testicular Sertoli cells. Toxicology 2016; 355-356:39-48. [PMID: 27236077 DOI: 10.1016/j.tox.2016.05.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/12/2016] [Accepted: 05/19/2016] [Indexed: 12/12/2022]
Abstract
The lead-induced toxic effect on mitochondria in Sertoli cells is not well studied and the underlying mechanism is poorly understood. Here we reported the potential role of peroxisome proliferator-activated receptor-γ coactivator 1α (PGC-1α) and multidrug resistance protein 1 (MRP1) in lead acetate-induced mitochondrial toxicity in mouse testicular Sertoli cells TM4 line. We found that lead acetate treatment significantly reduced the expression level of PGC-1α, but increased the level of MRP1 in mitochondria of TM4 cells. To determine the role of PGC-1α and MRP1 in lead acetate-induced mitochondrial toxicity, we then generated PGC-1α stable overexpression and MRP1 stable knockdown TM4 cells, respectively. The lead acetate treatment caused TM4 cell mitochondrial ultrastructure damages, a decrease in ATP synthesis, an increase in ROS levels, and apoptotic cell death. In contrast, stably overexpressing PGC-1α significantly ameliorated the lead acetate treatment-caused mitochondrial toxicity and apoptosis. Moreover, it was also found that stably knocking down the level of MRP1 increased the TM4 cell mitochondrial lead-accumulation by 4-6 folds. Together, the findings from this study suggest that PGC-1α and MRP1 plays important roles in protecting TM4 cells against lead-induced mitochondrial toxicity, providing a better understanding of lead-induced mitochondrial toxicity.
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Affiliation(s)
- Zhen Li
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China
| | - Xi Liu
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China
| | - Lu Wang
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China
| | - Yan Wang
- Department of Preventive Medicine, College of Basic Medical Sciences, Hubei University of Chineses Medicine, Wuhan 430065, PR China
| | - Chuang Du
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China
| | - Siyuan Xu
- Hubei Provincial Key Laboratory for Applied Toxicology, Hubei Provincial Academy for Preventive Medicine, Wuhan 430079, PR China
| | - Yucheng Zhang
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China
| | - Chunhong Wang
- Department of Toxicology, School of Public Health, Wuhan University, Donghu Road 115, Wuhan 430071, PR China.
| | - Chengfeng Yang
- Department of Physiology, Michigan State University East Lansing, MI 48824, USA.
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Gu H, Lou J, Wang H, Yang Y, Wu L, Wu J, Xu J. Biodegradation, Biosorption of Phenanthrene and Its Trans-Membrane Transport by Massilia sp. WF1 and Phanerochaete chrysosporium. Front Microbiol 2016; 7:38. [PMID: 26858710 PMCID: PMC4731505 DOI: 10.3389/fmicb.2016.00038] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 01/11/2016] [Indexed: 11/25/2022] Open
Abstract
Reducing phenanthrene (PHE) in the environment is critical to ecosystem and human health. Biodegradation, biosorption, and the trans-membrane transport mechanism of PHE by a novel strain, Massilia sp. WF1, and an extensively researched model fungus, Phanerochaete chrysosporium were investigated in aqueous solutions. Results showed that the PHE residual concentration decreased with incubation time and the data fitted well to a first-order kinetic equation, and the t1/2 of PHE degradation by WF1, spores, and mycelial pellets of P. chrysosporium were about 2 h, 87 days, and 87 days, respectively. The biosorbed PHE was higher in P. Chrysosporium than that in WF1, and it increased after microorganisms were inactivated and inhibited, especially in mycelial pellets. The detected intracellular auto-fluorescence of PHE by two-photon excitation microscopy also proved that PHE indeed entered into the cells. Based on regression, the intracellular (Kdin) and extracellular (Kdout) dissipation rate constants of PHE by WF1 were higher than those by spores and mycelial pellets. In addition, the transport rate constant of PHE from outside solution into cells (KinS/Vout) for WF1 were higher than the efflux rate constant of PHE from cells to outside solution (KoutS/Vin), while the opposite phenomena were observed for spores and mycelial pellets. The amount of PHE that transported from outside solution into cells was attributed to the rapid degradation and active PHE efflux in the cells of WF1 and P. Chrysosporium, respectively. Besides, the results under the inhibition treatments of 4°C, and the presence of sodium azide, colchicine, and cytochalasin B demonstrated that a passive trans-membrane transport mechanism was involved in PHE entering into the cells of WF1 and P. Chrysosporium.
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Affiliation(s)
- Haiping Gu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University Hangzhou, China
| | - Jun Lou
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University Hangzhou, China
| | - Haizhen Wang
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University Hangzhou, China
| | - Yu Yang
- Department of Civil and Environmental Engineering, University of Nevada, Reno NV, USA
| | - Laosheng Wu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang UniversityHangzhou, China; Department of Environmental Sciences, University of California at Riverside, RiversideCA, USA
| | - Jianjun Wu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University Hangzhou, China
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, Zhejiang University Hangzhou, China
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Li Z, Wang H, Huang S, Zhou L, Wang L, Du C, Wang C. Establishment of stable MRP1 knockdown by lentivirus-delivered shRNA in the mouse testis Sertoli TM4 cell line. Toxicol Mech Methods 2015; 25:81-90. [DOI: 10.3109/15376516.2014.989350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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20
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Drug resistance-related microRNAs in hematological malignancies: Translating basic evidence into therapeutic strategies. Blood Rev 2015; 29:33-44. [DOI: 10.1016/j.blre.2014.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/25/2014] [Accepted: 09/09/2014] [Indexed: 12/12/2022]
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