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Razmara P, Pyle GG. Effect of copper nanoparticles and copper ions on the architecture of rainbow trout olfactory mucosa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 227:112876. [PMID: 34634597 DOI: 10.1016/j.ecoenv.2021.112876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/04/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Olfactory epithelial cells are in direct contact with myriad environmental contaminants which may consequently disrupt their structure and function. Copper ions (Cu2+) and copper nanoparticles (CuNPs) are two types of olfactory neurotoxicants. However, their effects on the structure of olfactory epithelium are largely uninvestigated. The density of olfactory goblet cells in CuNP- and Cu2+ - exposed rainbow trout was assessed using light microscopy throughout time. In both copper (Cu) treatments, the number of goblet cells increased initially over the 24 h exposure and then recovered to normal throughout the 96 h exposure. These data suggested the 96 h exposure to Cu contaminants interfered with protective barrier provided by goblet cells. Nonetheless, lamellar and epithelial thickness of olfactory rosette did not change in the Cu-exposed fish. The gene transcript profile of olfactory mucosa studied by RNA-seq indicated Cu2+ and CuNPs differentially targeted the molecular composition of cell junctions. In the Cu2+ treatment, reduced mRNA abundances of tight junctions, adherens junction, desmosomes and hemidesmosomes, suggest that Cu2+-exposed olfactory mucosal cells had weak junctional complexes. In the CuNP treatment, on the other hand, the transcript abundances of cell junction compositions, except adherens junction, were upregulated. Transcripts associated with gap junctional channels were increased in both Cu treatments. The elevated transcript levels of gap junctions in both Cu treatments suggested that the demand for intercellular communication was increased in the Cu-exposed olfactory mucosa. Overall, our findings suggested that Cu2+ induced greater adverse effects on the molecular composition of olfactory cell junctions relative to CuNPs. Impairment of junctional complexes may disrupt the structural integrity of olfactory mucosa.
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Affiliation(s)
- Parastoo Razmara
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada.
| | - Gregory G Pyle
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
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Wang R, Zhao Z, Zheng L, Xing X, Ba W, Zhang J, Huang M, Zhu W, Liu B, Meng X, Bai J, Li C, Li H. MicroRNA-520a suppresses the proliferation and mitosis of HaCaT cells by inactivating protein kinase B. Exp Ther Med 2017; 14:6207-6212. [PMID: 29285178 DOI: 10.3892/etm.2017.5323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 08/21/2017] [Indexed: 01/05/2023] Open
Abstract
Psoriasis is a chronic inflammatory disease of the skin for which an effective treatment strategy remains to be developed. Characteristics of psoriasis include an altered differentiation of keratinocytes and hyperplasia of the skin. The present study aimed to investigate the role served by miR-520a in psoriasis. The results demonstrated that miR-520a inhibited the proliferation of HaCaT cells. miR-520a directly regulated the mRNA and protein expression of its target gene, protein kinase B (AKT). The siRNA silencing of AKT expression in these cells was also evaluated. miRNA-520a repressed the proliferation and mitotic entry of HaCaT cells, and promoted cell apoptosis. AKT silencing suppressed the proliferation of HaCaT cells. These results suggest that miRNA-520a regulates the survival of HaCaT cells by inhibiting AKT expression. miRNA-520a and AKT may therefore be novel targets for the treatment of patients with psoriasis.
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Affiliation(s)
- Rui Wang
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Zigang Zhao
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Liqiang Zheng
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Xiaojing Xing
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Wei Ba
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Junfen Zhang
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Min Huang
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Wenwei Zhu
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Bing Liu
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Xianfu Meng
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Jia Bai
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Chengxin Li
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
| | - Hengjin Li
- Department of Dermatology, Chinese People's Liberation Army General Hospital, Medical College of the Chinese People's Liberation Army, Beijing 100853, P.R. China
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