Categorization of nano-structured titanium dioxide according to physicochemical characteristics and pulmonary toxicity

Publication date: Available online 20 May 2016 Source:Toxicology Reports Author(s): Naoki Hashizume, Yutaka Oshima, Makoto Nakai, Toshio Kobayashi, Takeshi Sasaki, Kenji Kawaguchi, Kazumasa Honda, Masashi Gamo, Kazuhiro Yamamoto, Yasuhiro Tsubokura, Shozo Ajimi, Yoshiyuki Inoue, Nobuya Imatanaka A potentially useful means of predicting the pulmonary risk posed by new forms of nano-structured titanium dioxide (nano-TiO2) is to use the associations between the physicochemical properties and pulmonary toxicity of characterized forms of TiO2. In the present study, we conducted intratracheal administration studies in rats to clarify the associations between the physicochemical characteristics of seven characterized forms of TiO2 and their acute or subacute pulmonary inflammatory toxicity. Examination of the associations between the physicochemical characteristics of the TiO2 and the pulmonary inflammatory responses they induced revealed (1) that differences in the crystallinity or shape of the TiO2 particles were not associated with the acute pulmonary inflammatory response; (2) that particle size was associated with the acute pulmonary inflammatory response; and (3) that TiO2 particles coated with Al(OH)3 induced a greater pulmonary inflammatory response than did non-coated particles. We separated the seven TiO2 into two groups: a group containing the six TiO2 with no surface coating and a group containing the one TiO2 with a surface coating. Intratracheal administ...
Source: Toxicology Reports - Category: Toxicology Source Type: research

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CONCLUSION: Prevalence of antibiotic use was high not only versus other hospitals in the region but globally including Africa, coupled with significant evidence of sub-optimal prescribing. Swift action is needed to improve future prescribing to reduce AMR. One or two areas should initially be targeted for quality improvement including development of local guidelines, documentation of antibiotic indications and/or stop/review dates. PMID: 33034234 [PubMed - as supplied by publisher]
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research
Authors: Rombauts A, Abelenda-Alonso G, Cuervo G, Gudiol C, Carratalà J Abstract INTRODUCTION: Despite adequate antibiotic coverage, community-acquired pneumonia (CAP) remains a leading cause of hospitalization and mortality worldwide. It induces both a local pulmonary and a systemic inflammatory response, particularly significant in severe cases. The intensity of the dysregulated host response varies from patient to patient and has a negative impact on survival and other outcomes. AREAS COVERED: This comprehensive review summarizes the pathophysiological aspects of the inflammatory response in CAP, brie...
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research
Authors: Hammerschlag MR, Sharma R Abstract INTRODUCTION: Azithromycin was recommended as the first-line therapeutic regimen for treatment of genital infections in men and women by the Centers for Disease Control in 1998. A series of studies of azithromycin for treatment of rectal chlamydial infection in men who have sex with men (MSM) found that azithromycin was significantly less effective than doxycycline. AREAS COVERED: Literature on treatment of rectal C. trachomatis from 2000 through May 2020 was searched using PubMed. Retrospective and observational studies were identified documenting the frequency and t...
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research
Authors: Reissier S, Cattoir V Abstract INTRODUCTION: Streptogramins (pristinamycin and quinupristin-dalfopristin) can be interesting options for the treatment of infections due to Gram-positive cocci, especially multidrug-resistant isolates. AREAS COVERED: This review provides an updated overview on structural and activity characteristics, mechanisms of action and resistance, pharmacokinetic/pharmacodynamic and clinical use of streptogramins. EXPERT OPINION: The streptogramin antibiotics act by inhibition of the bacterial protein synthesis. They are composed of two chemically distinct compounds, namely typ...
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part BAuthor(s): Ping He, Yi Zhang, Xinyi Zhao, Jie Wei, Tianhong Xu, Jiang Wu, Naichao Chen
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part BAuthor(s): Jing Li, Haotian Li, Dongdong Lin, Muyi Li, Quansheng Wang, Song Xie, Yuming Zhang, Fengsong Liu
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part BAuthor(s): Yanhua Liu, Yang Li, Shanshan Dong, Lu Han, Ruixin Guo, Yourong Fu, Shenghu Zhang, Jianqiu Chen
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part AAuthor(s): Cheng Han, Yinping Zhang, Marc Redmile-Gordon, Huan Deng, Zhenggui Gu, Qiguo Zhao, Fang Wang
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part AAuthor(s): Taesik Go, Jihwan Kim, Sang Joon Lee
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
Publication date: 15 February 2021Source: Journal of Hazardous Materials, Volume 404, Part AAuthor(s): Daeeun Kwon, Woobin Bae, Jeonghwan Kim
Source: Journal of Hazardous Materials - Category: Environmental Health Source Type: research
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