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Zebrafish nanoparticle

Nadya Velikova, Nuria Mas, Laura Miguel-Romero, Lorena Polo Aguado, Ellen Stolte, Edoardo Zaccaria, Rui Cao, Nico Taverne, José Ramón Murguía, Ramon Martinez-Manez, Alberto Marina, Jerry Wells
Two-component systems (TCS) regulate diverse processes such as virulence, stress responses, metabolism and antibiotic resistance in bacteria but are absent in humans, making them promising targets for novel antibacterials. By incorporating recently described TCS histidine kinase autophosphorylation inhibitors (HKAIs) into ε-poly-L-lysine capped nanoparticles (NPs) we could overcome the Gram negative (Gr-) permeability barrier for the HKAIs. The observed bactericidal activity against Gr- bacteria was shown to be due to the enhanced delivery and internalization of the HKAIs and not an inhibitory or synergistic effect of the NPs...
October 5, 2016: Nanomedicine: Nanotechnology, Biology, and Medicine
Yu Su, Guoqing Yang, Kun Lu, Elijah J Petersen, Liang Mao
Understanding the colloidal stability of graphene is essential for predicting its transport and ecological risks in aquatic environments. We investigated the agglomeration of (14)C-labeled few-layer graphene (FLG) at concentrations spanning nearly four orders of magnitude (2 μg/L to 10 mg/L) using dynamic light scattering and sedimentation measurements. FLG agglomerates formed rapidly in deionized water at concentrations >3 mg/L. From 1 mg/L to 3 mg/L, salt-induced agglomeration was decreased with dilution of FLG suspensions; the critical coagulation concentration of the more concentrated suspension (3 mg/L) was significantly lower than the dilute suspension (1 mg/L) in the presence of NaCl (1...
October 6, 2016: Environmental Pollution
Jae Soon Kang, Jinjong Bong, Jin-Soo Choi, Theodore B Henry, June-Woo Park
Silver nanoparticles (AgNPs) have a strong antibacterial activity and the relevant modes of actions have regarded as direct or indirect causes of toxicity observed in the environment. In this study, the transcriptomic profiles in larval zebrafish (Danio rerio) exposed to AgNPs (about 50 nm in size) and AgNO3 as a comparative ionic silver were investigated and analyzed using differential expressed gene (DEG), Gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) pathway analyses. Results indicated that underlying molecular mechanisms are different each other...
October 28, 2016: Biochemical and Biophysical Research Communications
Rohit Bisht, Ilva D Rupenthal
Frequent intravitreal injections are currently used to overcome the ocular barriers and provide sufficient drug to the posterior eye segment. However, intravitreal injections have been associated with a number of complications and high treatment costs. To overcome these limitations, peptide-loaded poly(d,l-lactic-co-glycolic acid) nanoparticles (PLGA NPs) were developed using the nanoprecipitation technique and were optimized via Box-Behnken Design (BBD) and Response Surface Methodology (RSM). Developed NPs were evaluated for potential toxicity and cell apoptosis using the zebrafish embryo toxicity (ZET) model with titanium dioxide NPs and ethanol (1% v/v) serving as positive controls...
September 27, 2016: Pharmaceutical Development and Technology
Gregory Marslin, Bruno Filipe Carmelino Cardoso Sarmento, Gregory Franklin, José Alberto Ribeiro Martins, Carlos Jorge Ribeiro Silva, Andreia Ferreira Castro Gomes, Marisa Passos Sárria, Olga Maria Fernandes Pereira Coutinho, Alberto Carlos Pires Dias
Curcumin is a natural polyphenolic compound isolated from turmeric (Curcuma longa) with well-demonstrated neuroprotective and anticancer activities. Although curcumin is safe even at high doses in humans, it exhibits poor bioavailability, mainly due to poor absorption, fast metabolism, and rapid systemic elimination. To overcome these issues, several approaches, such as nanoparticle-mediated targeted delivery, have been undertaken with different degrees of success. The present study was conducted to compare the neuroprotective effect of curcumin encapsulated in poly(ε-caprolactone) and methoxy poly(ethylene glycol) poly(ε-caprolactone) nanoparticles in U251 glioblastoma cells...
September 14, 2016: Planta Medica
Bei Xu, Quansheng Jin, Jun Zeng, Ting Yu, Yan Chen, Shuangzhi Li, Daoqiong Gong, Lili He, Xiaoyue Tan, Li Yang, Gu He, Jinhui Wu, Xiangrong Song
A rational combination is critical to achieve efficiently synergistic therapeutic efficacy for tumor treatment. Hence, we designed novel antitumor combinations (T-NPs) by integrating the tumor vascular and tumor cells dual-targeting ligand with antiangiogenesis/antitumor agents. The truncated bFGF peptide (tbFGF), which could effectively bind to FGFR1 overexpressed on tumor neovasculature endothelial cells and tumor cells, was selected to modify PLGA nanoparticles (D/P-NPs) simultaneously loaded with PEDF gene and paclitaxel in this study...
October 5, 2016: ACS Applied Materials & Interfaces
Jia Du, Shutao Wang, Hong You, Zhongqiang Liu
Perfluorooctane sulfonate (PFOS) and ZnO nanoparticles (nano-ZnO) are widely distributed in the environment. However, the potential toxicity of co-exposure to PFOS and nano-ZnO remains to be fully elucidated. The test investigated the effects of co-exposure to PFOS and nano-ZnO on the hypothalamic-pituitary-thyroid (HPT) axis in zebrafish. Zebrafish embryos were exposed to a combination of PFOS (0.2, 0.4, 0.8mg/L) and nano-ZnO (50mg/L) from their early stages of life (0-14days). The whole-body content of TH and the expression of genes and proteins related to the HPT axis were analyzed...
September 2016: Journal of Environmental Sciences (China)
Hongyang Yi, Zhuyao Wang, Xiaojiao Li, Min Yin, Lihua Wang, Ali Aldalbahi, Nahed Nasser El-Sayed, Hui Wang, Nan Chen, Chunhai Fan, Haiyun Song
Many types of biocompatible nanomaterials have proven of low cytotoxicity and hold great promise for various applications in nanomedicine. Whereas they generally do not cause apparent organ toxicity or tissue damage in adult animals, it is yet to determine their biological consequences in more general contexts. In this study, we investigate how silica nanoparticles (NPs) affect cellular activities and functions under several physiological or pathological conditions. Although silica NPs are generally regarded as "inert" nanocarriers and widely employed in biomedical studies, we find that they actively affect Wnt signaling in various types of cell lines, diminishing its anti-adipogenic effect in preadipocytes and pro-invasive effect in breast cancer cells, and more significantly, impair Wnt-regulated embryonic development in Zebrafish...
2016: Theranostics
Chiranjib Chakraborty, Ashish Ranjan Sharma, Garima Sharma, Sang-Soo Lee
Presently, nanotechnology is a multi-trillion dollar business sector that covers a wide range of industries, such as medicine, electronics and chemistry. In the current era, the commercial transition of nanotechnology from research level to industrial level is stimulating the world's total economic growth. However, commercialization of nanoparticles might offer possible risks once they are liberated in the environment. In recent years, the use of zebrafish (Danio rerio) as an established animal model system for nanoparticle toxicity assay is growing exponentially...
2016: Journal of Nanobiotechnology
Govind Sharan Gupta, Alok Dhawan, Rishi Shanker
An exponential development in the use of silver nanoparticles (AgNPs) in consumer products has accelerated their release in aquatic environment. As the AgNPs enters into the aquatic systems, their fate may change due to interactions with abiotic (e.g. clay particles) or biotic factors. The abundantly present clay particles are expected to more prone for interaction with nanoparticles in aquatic systems. In the present study, it is demonstrated that AgNPs interacts with clay particles and forms heteroagglomerates...
November 2016: Chemosphere
Giulia Chemello, Chiara Piccinetti, Basilio Randazzo, Oliana Carnevali, Francesca Maradonna, Massimiliano Magro, Emanuela Bonaiuto, Fabio Vianello, Giuseppe Radaelli, Anna Paola Fifi, Federica Gigliotti, Ike Olivotto
Recently, the indiscriminate use of antibiotics in the aquaculture sector has raised public concern because of possible toxic effects, development of bacterial resistance, and accumulation of residues in individual tissues. Even if several countries have developed regulations about their use, it is clear that long-term growth of the aquaculture industry requires both ecologically sound practices and sustainable resource management. Alternative strategies for better management of antibiotic administration are of primary interest to improve absorption rates and, as a consequence, to reduce their release into the aquatic environment...
August 10, 2016: Zebrafish
Jin Soo Choi, Ryeo-Ok Kim, Seokjoo Yoon, Woo-Keun Kim
Zinc oxide nanoparticles (ZnO NPs) are being utilized in an increasing number of fields and commercial applications. While their general toxicity and associated oxidative stress have been extensively studied, the toxicological pathways that they induce in developmental stages are still largely unknown. In this study, the developmental toxicity of ZnO NPs to embryonic/larval zebrafish was investigated. The transcriptional expression profiles induced by ZnO NPs were also investigated to ascertain novel genomic responses related to their specific toxicity pathway...
2016: PloS One
Jiejun Gao, Cecon T Mahapatra, Christopher D Mapes, Maria Khlebnikova, Alexander Wei, Marisol S Sepúlveda
Nanoparticles (NPs, 1-100 nm) can enter the environment and result in exposure to humans and other organisms leading to potential adverse health effects. The aim of the present study is to evaluate the effects of early life exposure to polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs, 50 nm), particularly with respect to vascular toxicity on zebrafish embryos and larvae (Danio rerio). Previously published data has suggested that PVP-AgNP exposure can inhibit the expression of genes within the vascular endothelial growth factor (VEGF) signaling pathway, leading to delayed and abnormal vascular development...
November 2016: Nanotoxicology
Hyeyoun Chang, Ji Young Yhee, Gun Hyuk Jang, Dong Gil You, Ju Hee Ryu, Yongwhan Choi, Jin Hee Na, Jae Hyung Park, Kwan Hyi Lee, Kuiwon Choi, Kwangmeyung Kim, Ick Chan Kwon
Nanoparticles have resulted in great progress in biomedical imaging and targeted drug delivery in cancer theranostics. To develop nanoparticles as an effective carrier system for therapeutics, chemical structures and physicochemical properties of nanoparticle may provide a reliable means to predict the in vitro characteristics of nanoparticles. However, in vivo fates of nanoparticles, such as pharmacokinetics and tumor targeting efficiency of nanoparticles, have been difficult to predict beforehand. To predict the in vivo fates of nanoparticles in tumor-bearing mice, differences in physicochemical properties and in vitro cancer cell/macrophage uptake of 5 different nanoparticles with mean diameter of 200-250nm were comparatively analyzed, along with their circulation in adult zebrafish...
July 17, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
Carla Bacchetta, Gerardo López, Gisela Pagano, Diana Tomazi Muratt, Leandro Machado de Carvalho, José María Monserrat
The antimicrobial activity of silver nanoparticles (AgNP) makes them useful in a wide range of products although their environmental impact is still uncertain. The main goal of this study was to evaluate short-term effects induced by AgNP on gills oxidative status and bacterial communities living at the skin mucus of zebrafish. Both the number of bacteria colony forming units and bacteria growth obtained from skin mucus were lower in all concentrations tested (25, 50 and 100 µg nAg/L). Besides, AgNP exposure caused a significant decrease in bacteria growth in zebrafish exposed to 100 µg nAg/L...
October 2016: Bulletin of Environmental Contamination and Toxicology
Bharat Bhushan, Soundharapandiyan Nandhagopal, Rajaretinam Rajesh Kannan, P Gopinath
Reactive oxygen species (ROS) induced oxidative stress is one of the major factors responsible for initiation of several intracellular toxic events that leads to cell death. Antioxidant enzymes defence system of the body is responsible for maintaining the oxidative balance and cellular homeostasis. Several diseases are promoted by the excessive oxidative stress caused by the impaired antioxidant defence system that leads to oxidant/antioxidant imbalance in the body. In order to restore or precise the aberrant antioxidant system, a large number of catalytic nanoparticles has been screened so far...
October 1, 2016: Colloids and Surfaces. B, Biointerfaces
Haishan Zhao, Olivia J Osborne, Sijie Lin, Zhaoxia Ji, Robert Damoiseux, Yuqiang Wang, André E Nel, Shuo Lin
Recent studies suggest that the nanorods consisting of europium hydroxide could promote angiogenesis. In this study, it is sought to determine if additional types of nanoparticles are capable of enhancing angiogenesis and in addition, understand the underlying mechanisms. For this reason, a method is employed that combines a high throughput in vitro cell based screen coupled with an in vivo validation using vascular specific green fluorescent protein reporter transgenic zebrafish for examining proangiogenesis activity...
August 2016: Small
José María Lacave, Ander Retuerto, Unai Vicario-Parés, Douglas Gilliland, Miriam Oron, Miren P Cajaraville, Amaia Orbea
Due to the increasing commercialization of consumer and industrial products containing nanoparticles (NPs), an increase in the introduction of these materials into the environment is expected. NP toxicity to aquatic organisms depends on multiple biotic and abiotic factors, resulting in an unlimited number of combinations impossible to test in practice. The zebrafish embryo model offers a useful screening tool to test and rank the toxicity of nanomaterials according to those diverse factors. This work aims to study the acute and sublethal toxicity of a set of metal-bearing NPs displaying different properties, in comparison to that of the ionic and bulk forms of the metals, in order to establish a toxicity ranking...
August 12, 2016: Nanotechnology
Olivia J Osborne, Katsuki Mukaigasa, Hitomi Nakajima, Bjorn Stolpe, Isabella Romer, Uzoma Philips, Iseult Lynch, Sulayman Mourabit, Shigehisa Hirose, Jamie R Lead, Makoto Kobayashi, Tetsuhiro Kudoh, Charles R Tyler
Some nanoparticles (NPs) may induce adverse health effects in exposed organisms, but to date the evidence for this in wildlife is very limited. Silver nanoparticles (AgNPs) can be toxic to aquatic organisms, including fish, at concentrations relevant for some environmental exposures. We applied whole mount in-situ hybridisation (WISH) in zebrafish embryos and larvae for a suite of genes involved with detoxifying processes and oxidative stress, including metallothionein (mt2), glutathionine S-transferase pi (gstp), glutathionine S-transferase mu (gstm1), haem oxygenase (hmox1) and ferritin heavy chain 1 (fth1) to identify potential target tissues and effect mechanisms of AgNPs compared with a bulk counterpart and ionic silver (AgNO3)...
November 2016: Nanotoxicology
Kadarkarai Murugan, Jaganathan Anitha, Devakumar Dinesh, Udaiyan Suresh, Rajapandian Rajaganesh, Balamurugan Chandramohan, Jayapal Subramaniam, Manickam Paulpandi, Chitravel Vadivalagan, Pandiyan Amuthavalli, Lan Wang, Jiang-Shiou Hwang, Hui Wei, Mohamad Saleh Alsalhi, Sandhanasamy Devanesan, Suresh Kumar, Kannaiyan Pugazhendy, Akon Higuchi, Marcello Nicoletti, Giovanni Benelli
Mosquitoes are arthropods of huge medical and veterinary relevance, since they vector pathogens and parasites of public health importance, including malaria, dengue and Zika virus. Currently, nanotechnology is considered a potential eco-friendly approach in mosquito control research. We proposed a novel method of biofabrication of silver nanoparticles (AgNP) using chitosan (Ch) from crab shells. Ch-AgNP nanocomposite was characterized by UV-vis spectroscopy, FTIR, SEM, EDX and XRD. Ch-AgNP were tested against larvae and pupae of the malaria vector Anopheles stephensi obtaining LC50 ranging from 3...
October 2016: Ecotoxicology and Environmental Safety
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