Protein-Docking Strategy Boosting Raman Detection Sensitivity for Aristolochic Acid I
Publication date: Available online 19 October 2019Source: Sensors and Actuators B: ChemicalAuthor(s): Yun Gao, Tong Xuan, Fu Chen, Yiping Wu, Xiaoyu Guo, Ying Wen, Haifeng YangAbstractAs one of the most potent carcinogens, aristolochic acid I (AAI) can be founded in many plants, which are widely used as raw materials in traditional Chinese medicine. Surface enhanced Raman scattering (SERS) method would be developed to detect the AAI in rapid way. However, hydrophobic AAI molecule with small scattering section hardly approaches onto the surface of metal nanoparticles, resulting in poor Raman detection sensitivity. In this work, bovine serum albumin (BSA) decorated silver nanoparticles (Ag NPs) with core-shell structure (Ag@BSA NPs) are successfully synthesized. The molecular docking induced strong interaction between BSA and AAI is validated by molecular simulation and Ag@BSA NPs could actively capture AAI and anchor the target molecule into the hot spots of Ag NPs, which greatly improves SERS response of AAI. The dynamic linear range for SERS detection of AAI is from 0.5 to 50 μM (R2 = 0.9910) and the lowest detectable concentration of 0.28 μM is reached, which meeting the strict limitation of national standard regulation for AAI in cosmetic products. In addition, the method is applied for AAI determination in skin care products and good results are achieved.Graphical abstract
Publication date: Available online 20 November 2019Source: Journal of Advanced ResearchAuthor(s): Sohail Mumtaz, Pradeep Bhartiya, Neha Kaushik, Manish Adhikari, Pradeep Lamichhane, Su-Jae Lee, Nagendra Kumar Kaushik, Eun Ha ChoiAbstractOver the past few decades, microwave (MW) radiation has been widely used, and its biological effects have been extensively investigated. However, the effect of MW radiation on human skin biology is not well understood. We study the effects of pulsed high-power microwaves (HPMs) on melanoma (G361 and SK-Mel-31) and normal human dermal fibroblast (NHDF) cells. A pulsed power generator (Chundo...
Passive measles immunity waned quickly, and most infants were no longer protected from measles by age 3 months, a study found; US experts say the age of vaccination should remain the same.Medscape Medical News
Suresh K. Mukherji
SURESH K. MUKHERJI, MD, MBA, FACR
NEUROIMAGING CLINICS OF NORTH AMERICA
Resting state functional connectivity (RSFC) has been widely studied in functional magnetic resonance imaging (fMRI) and is observed by a significant temporal correlation of spontaneous low-frequency signal fluctuations (SLFs) both within and across hemispheres during rest. Different hypotheses of RSFC include the biophysical origin hypothesis and cognitive origin hypothesis, which show that the role of SLFs and RSFC is still not completely understood. Furthermore, RSFC and age studies have shown an “age-related compensation” phenomenon. RSFC data analysis methods include time domain analysis, seed-based correl...
ConclusionLL/MLD4, MLA, MLD, the degree of luminal diameter stenosis, CCO, RI, and %APV derived from cCTA can support the detection of hemodynamically significant coronary stenosis as compared with iFR®, with LL/MLD4 showing the greatest discriminatory power.