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Total 205 results found since Jan 2013.

siRNA@superparamagnetic iron oxide nanoparticles attenuate physiological toxicity of DEHP by suppressing autophagy pathway activities in Caenorhabditis elegans
Ecotoxicol Environ Saf. 2021 Dec 13;229:113083. doi: 10.1016/j.ecoenv.2021.113083. Online ahead of print.ABSTRACTBis(2-ethylhexyl)ortho-phthalate (DEHP) is a widely used plasticizer in polyvinyl chloride materials. Considering its widespread application, it has become a major environmental pollutant and can cause endocrine, reproductive system, and gastrointestinal disorders. Herein we aimed to elucidate the mechanisms via which DEHP causes cytotoxicity in Caenorhabditis elegans and assess whether siRNA@superparamagnetic iron oxide nanoparticles (SPIONs) can attenuate this effect. On exposing C. elegans to 10 μM DEHP, its...
Source: Ecotoxicology and Environmental Safety - December 16, 2021 Category: Environmental Health Authors: Yongyi Huang Xiling Du Te Liu Qiang Liu Source Type: research

Silence of PTEN in colorectal cancer cells via siRNA inhibits cell growth.
In this study, we aimed to examine the expression of PTEN in human colorectal cancer cell lines HCT-8 and to further investigate the functions of PTEN in colorectal cancer cells. Therefore, we established stably transfected HCT-8 cell lines expressing siRNA targeting the PTEN gene. Cell proliferation and cell migration of the siPTEN cells were characterized by the CCK-8 assay and the Transwell assay, respectively. Our results show that constitutive knockdown of the PTEN gene in siPTEN cells significantly promoted cell proliferation and migration. These results suggest that PTEN may play important roles in colorectal cancer...
Source: Journal of Environmental Pathology, Toxicology and Oncology - November 20, 2015 Category: Environmental Health Tags: J Environ Pathol Toxicol Oncol Source Type: research

Initial evidence of functional siRNA machinery in dinoflagellates
This study was aimed to adopt the RNA interference (RNAi) gene-silencing tool for dinoflagellate research, and to investigate the potential effects of RNAi-based silencing of proton-pump rhodopsin and CO2-fixing enzyme Rubisco encoding genes in dinoflagellates. It was found that RNAi treatment caused a significant decrease in growth rate in both species. Compared with the non- endogenous target (GFP-siRNA) and the blank control, RNAi treatments also suppressed the expression of the target genes. These results constitute the first experimental evidence of the existence and operation of siRNA in two species of dinoflagellate...
Source: Harmful Algae - December 2, 2018 Category: Environmental Health Source Type: research

Title: Genistein Disrupts Glucocorticoid Receptor Signaling in Human Uterine Endometrial Ishikawa Cells
Conclusions: Using Ishikawa cells, we observed that exposure to genistein resulted in distinct changes in gene expression and unique differences in the GR transcriptome. Citation: Whirledge S, Senbanjo LT, Cidlowski JA. 2015. Genistein disrupts glucocorticoid receptor signaling in human uterine endometrial Ishikawa cells. Environ Health Perspect 123:80–87; http://dx.doi.org/10.1289/ehp.1408437 Address correspondence to J.A. Cidlowski, NIH/NIEHS, MD F3-07, P.O. Box 12233, Research Triangle Park, NC 27709 USA. Telephone: (919) 541-1564. E-mail: cidlows1@niehs.nih.gov We thank X. Xu (Integrative Bioinformatic...
Source: EHP Research - December 31, 2014 Category: Environmental Health Authors: Web Admin Tags: Research Article January 2015 Source Type: research

Regulation of Chromatin Assembly and Cell Transformation by Formaldehyde Exposure in Human Cells
Conclusions: We propose that the inhibition of chromatin assembly represents a novel mechanism of cell transformation induced by the environmental and occupational chemical carcinogen FA. https://doi.org/10.1289/EHP1275 Received: 25 October 2016 Revised: 19 May 2017 Accepted: 23 May 2017 Published: 21 September 2017 Address correspondence to C. Jin, Dept. of Environmental Medicine, New York University School of Medicine, 57 Old Forge Rd., Tuxedo Park, NY 10987 USA. Telephone: (845) 731-3602. Email: Chunyuan.jin@nyumc.org *Current affiliation: Medical School of Nanjing University, Nanjing, China. †Current affiliatio...
Source: EHP Research - September 21, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research

Small interfering RNA targeting of peroxiredoxin Ⅱ gene enhances formaldehyde-induced toxicity in bone marrow cells isolated from BALB/c mice.
CONCLUSION: These results demonstrated that PrxⅡ gene was involved in FA-induced bone marrow toxicity, and siRNA targeting of PrxⅡcould enhance this toxic process. PMID: 31176251 [PubMed - as supplied by publisher]
Source: Ecotoxicology and Environmental Safety - June 4, 2019 Category: Environmental Health Authors: Yu G, Zhang Y, Liu S, Fan L, Yang Y, Huang Y, Song J Tags: Ecotoxicol Environ Saf Source Type: research

Role of GLI1 and NDRG1 in Increased Resistance to Apoptosis Induction.
We examined the effects of GLI1 expression in PW mouse embryo fibroblasts and H441 lung carcinoma cells. Ectopic expression of GLI1 in PW cells induced anchorage-independent growth and increased resistance to staurosporine-induced apoptosis, and overexpression of GLI1 in H441 cells caused resistance to apoptosis induced by staurosporine and etoposide. GLI1 expression in both H441 and PW cells was associated with increased expression of NDRG1, a gene known to be downregulated by the MYC family of proteins, indicating that upregulation of NDRG1 by GLI1 is not cell-type specific. Consistent with suppression of NDRG1 by c-MYC ...
Source: Journal of Environmental Pathology, Toxicology and Oncology - November 20, 2015 Category: Environmental Health Tags: J Environ Pathol Toxicol Oncol Source Type: research

Nrf2 Is Crucial For The Down-Regulation Of Cyp7a1 Induced By Arachidonic Acid In Hepg2 Cells
In conclusion, Nrf2 plays a significant role in the down-regulation of CYP7A1 induced by AA in HepG2 cells.Abbreviations: AA, arachidonic acid; CYP7A1, cholesterol 7α-hydroxylase; FA, fatty acid; HFD, high-fat diet; NAFLD, non-alcoholic fatty liver disease; Nrf2, nuclear factor erythroid-derived 2-like 2; siRNA, small interfering RNA.
Source: Environmental Toxicology and Pharmacology - March 7, 2017 Category: Environmental Health Source Type: research

Silencing of DNA repair sensitizes pediatric brain tumor cells to ɣ-irradiation using gold nanoparticles
We present a nanoparticle (NP)-mediated delivery vehicle that effectively carries and protects siRNA in pediatric ependymoma (EP) and medulloblastoma (MB) cells. The delivery vehicle consists of gold NPs coated with a polymeric shell comprising polyethylene glycol (PG), chitosan and polyethyleneimine (Au-CP-PEI). NPs loaded with siRNA knocked down Ape1 expression by over 75% in both MB and EP cells. Further, this reduction in Ape1 expression is associated with an increase in DNA damage after irradiation. The results indicate that NP-associated delivery of siApe1 is a feasible approach to circumventing pediatric brain tumor...
Source: Environmental Toxicology and Pharmacology - April 28, 2017 Category: Environmental Health Source Type: research

Silencing of DNA repair sensitizes pediatric brain tumor cells to γ-irradiation using gold nanoparticles
We present a nanoparticle (NP)-mediated delivery vehicle that effectively carries and protects siRNA in pediatric ependymoma (EP) and medulloblastoma (MB) cells. The delivery vehicle consists of gold NPs coated with a polymeric shell comprising polyethylene glycol (PG), chitosan and polyethyleneimine (Au-CP-PEI). NPs loaded with siRNA knocked down Ape1 expression by over 75% in both MB and EP cells. Further, this reduction in Ape1 expression is associated with an increase in DNA damage after irradiation. The results indicate that NP-associated delivery of siApe1 is a feasible approach to circumventing pediatric brain tumor...
Source: Environmental Toxicology and Pharmacology - May 11, 2017 Category: Environmental Health Source Type: research

Ferroptosis mediated by the interaction between Mfn2 and IRE α promotes arsenic-induced nonalcoholic steatohepatitis.
Ferroptosis mediated by the interaction between Mfn2 and IREα promotes arsenic-induced nonalcoholic steatohepatitis. Environ Res. 2020 Jun 23;188:109824 Authors: Wei S, Qiu T, Wang N, Yao X, Jiang L, Jia X, Tao Y, Zhang J, Zhu Y, Yang G, Liu X, Liu S, Sun X Abstract Exposure to arsenic is a risk factor for nonalcoholic steatohepatitis (NASH). Ferroptosis is a form of regulated cell death defined by the accumulation of lipid peroxidation. In the current study, we observed the occurrence of ferroptosis in arsenic-induced NASH by assessing ferroptosis related hallmarks. In vitro, we found that ferrostat...
Source: Environmental Research - June 22, 2020 Category: Environmental Health Authors: Wei S, Qiu T, Wang N, Yao X, Jiang L, Jia X, Tao Y, Zhang J, Zhu Y, Yang G, Liu X, Liu S, Sun X Tags: Environ Res Source Type: research

The role of NLRP3 in lead-induced neuroinflammation and possible underlying mechanism
CONCLUSIONS: NLRP3 is involved in the regulation of Pb-induced neurotoxicity. These findings expand mechanism research of Pb neurotoxicity and may help establish new prevention strategies for Pb neurotoxicity.PMID:34182382 | DOI:10.1016/j.envpol.2021.117520
Source: Environmental Pollution - June 28, 2021 Category: Environmental Health Authors: Peng Su Diya Wang Zipeng Cao Jingyuan Chen Jianbin Zhang Source Type: research

ALKBH5 promotes cadmium-induced transformation of human bronchial epithelial cells by regulating PTEN expression in an m6A-dependent manner
In this study, human bronchial epithelial BEAS-2B cells were transformed by exposing to 2 μM of cadmium for 20 weeks to investigate the role of m6A in cadmium carcinogenesis. We found the level of m6A in mRNA was significantly decreased in cadmium-transformed BEAS-2B cells, and this change was regulated by m6A demethylase ALKBH5. ALKBH5 was significantly upregulated in the middle and late stages of cell transformation at week 8, 12, 16 and 20. Knockdown of ALKBH5 in cadmium-transformed cells alleviated cell proliferation, migration, invasion, and anchorage-independent growth, but co-transfection with ALKBH5 siRNA and PTEN...
Source: Ecotoxicology and Environmental Safety - August 26, 2021 Category: Environmental Health Authors: Luyao Li Mei Zhou Biyun Chen Qin Wang Shuya Pan Yaxuan Hou Jiamin Xia Xue Zhou Source Type: research