In view of the toxicity of chromium (Cr(3+)) ions, it was explored the damaging effects that this ion could induce in cell membranes. The measurement of the effects induced by Cr(3+) ions on electrophysiological parameters of short-circuit current and on the potential difference were investigated using the outer side (mucosal) and the inner side (serosal) of toad Pleurodema thaul skin. The results showed a decreased on electrophysiological parameters when it were administered concentrations of 33, 100 and 200 μM of Cr(3+), the results also suggest that the administration of Cr(3+) inhibits the ion transport in toad skin by the interaction of Cr(3+) with lipid bilayers or protein constituents of membrane, and not by an inhibition of the active transport of ions across Na(+) channels.

01 Nov 2015·ChemosphereQ2 · ENVIRONMENTAL SCIENCE & ECOLOGY

Growth performance and oxidative damage in kidney induced by oral administration of Cr(III) in chicken

Q2 · ENVIRONMENTAL SCIENCE & ECOLOGY

Article

Author: Liu, Yanhan ; Liu, Jianzhu ; Zhang, Xiao ; Liu, Cun ; Fan, Wentao ; Cheng, Jia

This study aimed to evaluate the effects of adding chromic chloride (CrCl3) in the drinking water of chickens. Hyland brown male chickens were randomly divided into four groups. Three groups orally received 1/2 LD50, 1/4 LD50, and 1/8 LD50 CrCl3mgkg(-1) body weight daily for 42d. The fourth group was treated with water. The chickens were sacrificed at 14, 28, and 42d post-treatment. The renal injury was examined through histological analysis, and kidney mass was determined. The effects on growth performance were assessed by measuring the weight of the body, chest muscles, and leg muscles. Oxidative damage was evaluated by determining the antioxidant defense levels in kidney homogenates. The body weight and the weight of tissues gained time-dependently, but significantly decreased compared with those in the control group (P<0.05) at the same exposure time. Administering Cr(3+) significantly increased the levels of malondialdehyde, glutathione, and hydrogen peroxide in the kidney compared with those in the control groups. Whereas, administering Cr(3+) reduced the activities of superoxide dismutase, catalase, glutathione peroxidase, and total an-tioxidant capacity compared with those in the control group (P<0.05) in a dose- and time-dependent manner. In conclusion, oral administration of CrCl3 decreases the growth performance of chickens, leads to the pathological lesions and affects nephritic antioxidant capacity in the kidney dose- and time-dependently.

01 Aug 2015·Acta BiomaterialiaQ1 · ENGINEERING & TECHNOLOGY

β-Ga2O3:Cr3+ nanoparticle: A new platform with near infrared photoluminescence for drug targeting delivery and bio-imaging simultaneously

Q1 · ENGINEERING & TECHNOLOGY

Article

Author: Wang, Xin-Shi ; Situ, Jun-Qing ; Du, Yong-Zhong ; Pan, Hua-fei ; Ying, Xiao-Ying ; Chen, Hui ; Jin, Yi

Multifunctional nanoparticles which integrate the therapeutic agents and bio-imaging agents into one carrier are emerging as a promising therapeutic platform. Herein, GaOOH:Cr(3+) was firstly synthesized using improved hydrothermal method (atmospheric pressure, 95 °C), and by manipulating the pH of the reaction medium, GaOOH:Cr(3+) with different sizes (125.70 nm, 200.60 nm and 313.90 nm) were synthesized. Then β-Ga2O3:Cr(3+) nanoparticles with porous structures were developed as a result of the calcination of GaOOH:Cr(3+). The fabricated, porous β-Ga2O3:Cr(3+) nanoparticles could effectively absorb doxorubicin hydrochloride (DOX) (loading rate: 8% approximately) and had near infrared photoluminescence with a 695 nm emission. Furthermore, β-Ga2O3:Cr(3+) nanoparticles were coated with l-Cys modified hyaluronic acid (HA-Cys) by exploiting the electrostatic interaction and the cross-link effect of disulfide bond to improve the stability. The DOX loaded HA-Cys coated β-Ga2O3:Cr(3+) nanoparticles (HA/β-Ga2O3:Cr(3+)/DOX) showed an oxidation-reduction sensitive drug release behavior. The HA-Cys coated β-Ga2O3:Cr(3+) nanoparticles showed a low cytotoxicity on MCF-7 and Hela cell lines. The cellular uptake of HA/β-Ga2O3:Cr(3+)/DOX using the near infrared photoluminescence of β-Ga2O3:Cr(3+) nanoparticles and the fluorescence of DOX demonstrated the HA/β-Ga2O3:Cr(3+)/DOX could internalize into tumor cells quickly, which was affected by the size and shape of β-Ga2O3:Cr(3+)nanoparticles.

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