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Ranjan R, Kayastha AM, Sinha N. Interactions Between Amyloid-β (1-42) and Hydroxyapatite-Cholesterol Spherules Associated with Age-Related Macular Degeneration. Protein J 2021; 40:849-856. [PMID: 34718942 DOI: 10.1007/s10930-021-10026-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2021] [Indexed: 10/19/2022]
Abstract
Drusen deposition on sub-retinal pigment epithelium is the causal factor for age-related macular degeneration for the old-aged individuals. These deposits contain hydroxyapatite-cholesterol spherules on which several proteins and lipids accumulate to cover the retina and choroid, causing blurred vision and blindness. Amyloid-β, the known culprit in Alzheimer's disease, is one among the few major proteins known to occur in these deposits. In the present article, we report preliminary analyses of interactions between amyloid-β and hydroxyapatite-cholesterol composites using Thioflavin-T binding kinetics, solid-state NMR and transmission electron microscopy (TEM). Thioflavin-T fluorescence kinetics shows that amyloid-β (1-42) aggregates only under certain conditions of concentration of cholesterol in the hydroxyapatite-cholesterol composites prepared by two different methods. These results were confirmed by 1D 13C CPMAS solid-state NMR. TEM imaging revealed that there is an exposure of the cholesterol surface in the composites prepared by sonication method. These imaging experiments explain the dependence of aggregation kinetics on the exposure and availability of cholesterol surface in the composites to a certain extent.
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Affiliation(s)
- Renuka Ranjan
- Centre of Biomedical Research, SGPGIMS Campus, Raebareily Road, Lucknow, 226014, India.,School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Arvind M Kayastha
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Neeraj Sinha
- Centre of Biomedical Research, SGPGIMS Campus, Raebareily Road, Lucknow, 226014, India.
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Ling Y, Wang G, Chen T, Fei X, Hu S, Shan Q, Hei D, Feng H, Jia W. Irradiation-catalysed degradation of methyl orange using BaF 2-TiO 2 nanocomposite catalysts prepared by a sol-gel method. ROYAL SOCIETY OPEN SCIENCE 2019; 6:191156. [PMID: 31824723 PMCID: PMC6837232 DOI: 10.1098/rsos.191156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/02/2019] [Indexed: 05/07/2023]
Abstract
BaF2-TiO2 nanocomposite material (hereinafter called the composite) was prepared by a sol-gel method. The composite surface area, morphology and structure were characterized by Brunauer-Emmett-Teller method, X-ray diffraction analysis and a scanning electron microscopy. The results showed that BaF2 and TiO2 form a PN-like structure on the surface of the composite. Composites were used to catalyse the degradation of methyl orange by irradiation with ultraviolet light, γ-rays and an electron beam (EB). It was demonstrated that the composite is found to be more efficient than the prepared TiO2 and commercial P25 in the degradation of methyl orange under γ-irradiation. Increasing the composite catalyst concentration within a certain range can effectively improve the decolorization rate of the methyl orange solution. However, when the composite material is used to catalyse the degradation of organic matter in the presence of ultraviolet light or 10 MeV EB irradiation, the catalytic effect is poor or substantially ineffective. In addition, a hybrid mechanism is proposed; BaF2 absorbs γ-rays to generate radioluminescence and further excites TiO2 to generate photo-charges. Due to the heterojunction effect, the resulting photo-charge will produce more active particles. This seems to be a possible mechanism to explain γ-irradiation's catalytic behaviour.
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Affiliation(s)
- Yongsheng Ling
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, 215021 Suzhou, People's Republic of China
| | - Guang Wang
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
| | - Ting Chen
- School of Environment Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, People's Republic of China
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, People's Republic of China
| | - Xionghui Fei
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
| | - Song Hu
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
| | - Qing Shan
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
| | - Daqian Hei
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
| | - Huajun Feng
- School of Environment Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, People's Republic of China
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, People's Republic of China
| | - Wenbao Jia
- Department of Nuclear Science and Engineering, Nanjing University of Aeronautics and Astronautics, 211106 Nanjing, People's Republic of China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, 215021 Suzhou, People's Republic of China
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Fu W, Li L, Xiong SW, Zhang T, Jia W, Zhu J, Zhao Z, Xia H, He J, Liu GC. miR-423 rs6505162 C>A polymorphism contributes to decreased Wilms tumor risk. J Cancer 2018; 9:2460-2465. [PMID: 30026843 PMCID: PMC6036889 DOI: 10.7150/jca.24916] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 04/14/2018] [Indexed: 02/07/2023] Open
Abstract
Wilms tumor (WT) is the most prevalent urologic malignancy in childhood. Nonetheless, the genetic factors underlying WT remain largely unknown. The miR-423 rs6505162 C>A polymorphism is associated with the susceptibility to numerous cancers; however, no investigations have been conducted on its association with WT. To evaluate the correlation between the miR-423 rs6505162 C>A polymorphism and WT risk in Chinese children, we genotyped this polymorphism using the Taqman method in 145 cases and 531 cancer-free controls. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to estimate the strength of the association. The results showed that the rs6505162 CA genotype was associated with decreased susceptibility to WT (CA versus CC: adjusted OR=0.65, 95% CI=0.42-0.99, P=0.047). In the stratified analysis, we found that CA/AA genotypes conferred a significantly decreased overall risk of WT in children younger than 18 months (adjusted OR=0.30, 95% CI=0.14-0.63, P=0.002) and those with clinical stage I+II WT (adjusted OR=0.42, 95% CI=0.20-0.85, P=0.017) when compared with CC genotype. In summary, the miR-423 rs6505162 C>A polymorphism may negatively modify WT susceptibility in Chinese children. Our findings should be validated in larger studies involving other ethnicities.
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Affiliation(s)
- Wen Fu
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Li Li
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming 650228, Yunnan, China
| | - Si-Wei Xiong
- Department of Urology, Guangzhou First People's Hospital, the Second Affiliated Hospital of South China University of Technology, Guangzhou 510180, Guangdong, China
| | - Tiesong Zhang
- Kunming Key Laboratory of Children Infection and Immunity, Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming 650228, Yunnan, China
| | - Wei Jia
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Jinhong Zhu
- Department of Clinical Laboratory, Molecular Epidemiology Laboratory, Harbin Medical University Cancer Hospital, Harbin 150040, Heilongjiang, China
| | - Zhang Zhao
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Huimin Xia
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Jing He
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
- ✉ Corresponding authors: Guo-Chang Liu, Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China, ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics,Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China, or
| | - Guo-Chang Liu
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
- ✉ Corresponding authors: Guo-Chang Liu, Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China, ; or Jing He, Department of Pediatric Surgery, Guangzhou Institute of Pediatrics,Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou 510623, Guangdong, China, or
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