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1.
Sci Rep ; 5: 17259, 2015 Nov 30.
Article in English | MEDLINE | ID: mdl-26616161

ABSTRACT

The affinity of zeolite nanoparticles (diameter of 8-12 nm) possessing high surface area and high pore volume towards human plasma proteins has been investigated. The protein composition (corona) of zeolite nanoparticles has been shown to be more dependent on the plasma protein concentrations and the type of zeolites than zeolite nanoparticles concentration. The number of proteins present in the corona of zeolite nanoparticles at 100% plasma (in vivo state) is less than with 10% plasma exposure. This could be due to a competition between the proteins to occupy the corona of the zeolite nanoparticles. Moreover, a high selective adsorption for apolipoprotein C-III (APOC-III) and fibrinogen on the zeolite nanoparticles at high plasma concentration (100%) was observed. While the zeolite nanoparticles exposed to low plasma concentration (10%) exhibited a high selective adsorption for immunoglobulin gamma (i.e. IGHG1, IGHG2 and IGHG4) proteins. The zeolite nanoparticles can potentially be used for selectively capture of APOC-III in order to reduce the activation of lipoprotein lipase inhibition during hypertriglyceridemia treatment. The zeolite nanoparticles can be adapted to hemophilic patients (hemophilia A (F-VIII deficient) and hemophilia B (F-IX deficient)) with a risk of bleeding, and thus might be potentially used in combination with the existing therapy.


Subject(s)
Blood Proteins , Nanoparticles , Zeolites , Adsorption , Apolipoprotein C-III/chemistry , Blood Coagulation , Blood Proteins/chemistry , Chromatography, Liquid , Fibrinogen/chemistry , Humans , Nanoparticles/chemistry , Nanoparticles/ultrastructure , Nitrogen/chemistry , Protein Corona , Tandem Mass Spectrometry , Zeolites/chemistry
2.
Sleep Breath ; 13(4): 357-67, 2009 Nov.
Article in English | MEDLINE | ID: mdl-19377905

ABSTRACT

BACKGROUND: Sleep deprivation is common among teenagers. The aim of this study was to investigate the relationship between sleep duration, wake/sleep symptoms, and academic performance among Hong Kong students. MATERIALS AND METHODS: The sleep habit questionnaires were distributed to all Year 11 students at an international school that catered to different ethnic groups in Hong Kong. Analysis of various parameters of academic performance and sleep habits and their relationships were undertaken. RESULTS: Fifty-nine students were recruited. The average sleep duration in this group was 7.23 h. The overall prevalence of excessive daytime sleepiness (defined as an Epworth Sleepiness Scale score of >10) was 25.4%. Eleven subjects had excessive class sleepiness, defined as high likelihood to fall asleep during at least one school session. Mathematics performance was positively correlated with sleep duration. Excessive sleepiness on rising was identified as a significant risk factor for poor performance in English and Mathematics. Sleepiness during the third and fourth lessons was identified as a significant risk factor for poor performance in Mathematics only. CONCLUSION: Sleep deprivation was common in the studied cohort and it was associated with a decrease in Mathematics performance. Excessive sleepiness on rising and sleepiness during third and fourth lessons were associated with poorer grades in Mathematics and English. Excessive daytime sleepiness was reported in 25% of students. Bruxism and snoring were associated with excessive daytime sleepiness.


Subject(s)
Achievement , Sleep Deprivation/psychology , Sleep Initiation and Maintenance Disorders/psychology , Adolescent , Attention , Bruxism/diagnosis , Bruxism/epidemiology , Bruxism/psychology , Cohort Studies , Disorders of Excessive Somnolence/diagnosis , Disorders of Excessive Somnolence/epidemiology , Disorders of Excessive Somnolence/psychology , Female , Health Surveys , Hong Kong , Humans , Male , Mathematics , Sleep Deprivation/diagnosis , Sleep Deprivation/epidemiology , Sleep Initiation and Maintenance Disorders/diagnosis , Sleep Initiation and Maintenance Disorders/epidemiology , Snoring/diagnosis , Snoring/epidemiology , Snoring/psychology
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