Assessment of biopolymer stabilized silver nanoparticle for their ecotoxicity on Ceriodaphnia cornuta and antibiofilm activity

Vijayakumar, Sekar; Malaikozhundan, Balasubramanian; Ramasamy, Palaniappan; Vaseeharan, Baskaralingam

doi:10.1016/j.jece.2016.03.036

Cited by 32 publications

(7 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both intravenous and intraperitoneal administration caused renal tubular damage, necrosis and fragmentation of the liver cells [104]. PBNMs of sodium alginate did not cause ecotoxic effects on Ceriodaphnia cornuta, as no mortality was observed in an indirect assessment [105].…”

Section: Nanoalginic Acidmentioning

confidence: 96%

Evaluation of Ecotoxicology Assessment Methods of Nanomaterials and Their Effects

Boros

Ostafe

2020

Nanomaterials

View full text Add to dashboard Cite

This paper describes the ecotoxicological effects of nanomaterials (NMs) as well as their testing methods. Standard ecotoxicity testing methods are applicable to nanomaterials as well but require some adaptation. We have taken into account methods that meet several conditions. They must be properly researched by a minimum of ten scientific articles where adaptation of the method to the NMs is also presented; use organisms suitable for simple and rapid ecotoxicity testing (SSRET); have a test period shorter than 30 days; require no special equipment; have low costs and have the possibility of optimization for high-throughput screening. From the standard assays described in guidelines developed by organizations such as Organization for Economic Cooperation and Development and United States Environmental Protection Agency, which meet the required conditions, we selected as methods adaptable for NMs, some methods based on algae, duckweed, amphipods, daphnids, chironomids, terrestrial plants, nematodes and earthworms. By analyzing the effects of NMs on a wide range of organisms, it has been observed that these effects can be of several categories, such as behavioral, morphological, cellular, molecular or genetic effects. By comparing the EC50 values of some NMs it has been observed that such values are available mainly for aquatic ecotoxicity, with the most sensitive test being the algae assay. The most toxic NMs overall were the silver NMs.

show abstract

Section: Nanoalginic Acidmentioning

confidence: 96%

Evaluation of Ecotoxicology Assessment Methods of Nanomaterials and Their Effects

Boros

Ostafe

2020

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…The antibiofilm activity of SA-AgNPs was tested against Gram positive (Listeria monocytogenes) and Gram negative (Vibrio parahaemolyticus) bacteria. The authors reported biofilm inhibition of 98% for L. monocytogenes and of 84% for V. parahaemolyticus at 75 µg/L SA-AgNPs concentration [112].…”

Section: Impairment Of the Respiratory Chain And Enhancement Of Ros Pmentioning

confidence: 98%

“…Vijayakumar et al [112] choose an environment-friendly green synthesis [113] to prepare alginate stabilized silver nanoparticles (SA-AgNPs). The synthesis was carried out in the water as an environmentally benign solvent, using silver nitrate as a metal precursor, sodium borohydride as a reducing agent, and the biopolymer sodium alginate as a capping agent.…”

Section: Impairment Of the Respiratory Chain And Enhancement Of Ros Pmentioning

confidence: 99%

“…The reaction mixture was eventually dialyzed against water to remove any unreacted AgNO 3 , NaBH 4 , and salts formed during synthesis. The SA-AgNPs were freeze-dried [112]. The ecotoxicity of prepared SA-AgNPs was assessed on Ceriodaphnia cornuta, a freshwater crustacean, in comparison with sodium alginate and silver nitrate.…”

Section: Impairment Of the Respiratory Chain And Enhancement Of Ros Pmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Surface Nanoengineering for Biofilm Prevention and Control. Part II: Active, Combined Active and Passive, and Smart Bacteria-Responsive Antibiofilm Nanocoatings

Balaure

Grumezescu

2020

Nanomaterials

View full text Add to dashboard Cite

The second part of our review describing new achievements in the field of biofilm prevention and control, begins with a discussion of the active antibiofilm nanocoatings. We present the antibiofilm strategies based on antimicrobial agents that kill pathogens, inhibit their growth, or disrupt the molecular mechanisms of biofilm-associated increase in resistance and tolerance. These agents of various chemical structures act through a plethora of mechanisms targeting vital bacterial metabolic pathways or cellular structures like cell walls and cell membranes or interfering with the processes that underlie different stages of the biofilm life cycle. We illustrate the latter action mechanisms through inhibitors of the quorum sensing signaling pathway, inhibitors of cyclic-di-GMP signaling system, inhibitors of (p)ppGpp regulated stringent response, and disruptors of the biofilm extracellular polymeric substances matrix (EPS). Both main types of active antibiofilm surfaces, namely non-leaching or contact killing systems, which rely on the covalent immobilization of the antimicrobial agent on the surface of the coatings and drug-releasing systems in which the antimicrobial agent is physically entrapped in the bulk of the coatings, are presented, highlighting the advantages of each coating type in terms of antibacterial efficacy, biocompatibility, selective toxicity, as well as drawbacks and limitations. Developments regarding combined strategies that join in a unique platform, both passive and active elements are not omitted. In such platforms with dual functionality, passive and active strategies can be applied either simultaneously or sequentially. We especially emphasize those systems that can be reversely and repeatedly switched between the non-fouling status and the bacterial killing status, thereby allowing several bacteria-killing/surface regeneration cycles to be performed without significant loss of the initial bactericidal activity. Eventually, smart antibiofilm coatings that release their antimicrobial payload on demand, being activated by various triggers such as changes in local pH, temperature, or enzymatic triggers, are presented. Special emphasis is given to the most recent trend in the field of anti-infective surfaces, specifically smart self-defensive surfaces for which activation and switch to the bactericidal status are triggered by the pathogens themselves.

show abstract

“…During the radiosynthesis, pendant carboxyl groups along the alginate chains act as templates for nucleating points, in which the reduction of immobilized Ag + cations to zerovalent Ag take place. Consequently, the immobilization avoids coalescence of nucleating points, thus limiting the growth of metal core during synthesis [25,31].…”

Section: Role Of Alginate During Gamma Radiosynthesis Of Agnpsmentioning

confidence: 99%

Potentials of Alginates as Capping Agent for Oral Colon Delivery of Radiosynthesized Silver Nanoparticles: A Review

2022

View full text Add to dashboard Cite

Radiosynthesized silver nanoparticles (AgNPs) offer benefits for treatment of chronic colon inflammation due to their anti-inflammatory activity. Targeted delivery of AgNPs to the colon allows topical treatment at high concentration but at reduced systemic side effects. Meanwhile, related to drug administration, oral route is a common method. However, the physiology of the gastrointestinal (GI) tract limits the AgNPs ability to achieve their therapeutic level. This is specifically related to the acidic environment of the stomach and mucus layer of the GI tract. Concurently, alginates are one of the most extensively explored biomaterial classes for drug delivery system due to its biocompatibility, gel-forming ability at mild condition, anionic nature, sensitivity, and mucoadhesiveness. In this review we provide an overview of appropriate features of alginates as capping agent for oral delivery of radiosynthesized AgNPs to the colon. As capping agents, alginates play multiple roles specific to its processing stages, i.e., radiosynthesis, stabilization of nanoparticle system, and oral colon delivery devices of AgNPs. Additionally, we describe outstanding features of alginates as capping agents for drug delivery device as well as the positive contributions of radiation processing on improving the functional effects of alginate.

show abstract

Assessment of biopolymer stabilized silver nanoparticle for their ecotoxicity on Ceriodaphnia cornuta and antibiofilm activity

Cited by 32 publications

References 49 publications

Evaluation of Ecotoxicology Assessment Methods of Nanomaterials and Their Effects

Evaluation of Ecotoxicology Assessment Methods of Nanomaterials and Their Effects

Recent Advances in Surface Nanoengineering for Biofilm Prevention and Control. Part II: Active, Combined Active and Passive, and Smart Bacteria-Responsive Antibiofilm Nanocoatings

Potentials of Alginates as Capping Agent for Oral Colon Delivery of Radiosynthesized Silver Nanoparticles: A Review

Contact Info

Product

Resources

About