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Raman spectroscopy AND clinical application

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https://www.readbyqxmd.com/read/28210442/a-portable-fiber-optic-raman-spectrometer-concept-for-evaluation-of-mineral-content-within-enamel-tissue
#1
Anna Akkus, Shan Yang, Renato Roperto, Hathem Mustafa, Sorin Teich, Ozan Akkus
BACKGROUND: Measurement of tooth enamel mineralization using a clinically viable method is essential since variation of mineralization may be used to monitor caries risk or in assessing the effectiveness of remineralization therapy. Fiber optic Raman systems are becoming more affordable and popular in context of biomedical applications. However, the applicability of fiber optic Raman systems for measurement of mineral content within enamel tissue has not been elucidated significantly in the prior literature...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28192951/identification-and-quantification-of-intravenous-therapy-drugs-using-normal-raman-spectroscopy-and-electrochemical-surface-enhanced-raman-spectroscopy
#2
Stephanie Zaleski, Kathleen A Clark, Madison M Smith, Jan Y Eilert, Mark Doty, Richard P Van Duyne
Errors in intravenous (IV) drug therapies can cause human harm and even death. There are limited label-free methods that can sensitively monitor the identity and quantity of the drug being administered. Normal Raman spectroscopy (NRS) provides a modestly sensitive, label-free, and completely noninvasive means of IV drug sensing. In the case that the analyte cannot be detected within its clinical range with Raman, a label-free surface-enhanced Raman spectroscopy (SERS) approach can be implemented to detect the analyte of interest...
January 30, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28042588/review-of-the-potential-of-optical-technologies-for-cancer-diagnosis-in-neurosurgery-a-step-toward-intraoperative-neurophotonics
#3
REVIEW
Fartash Vasefi, Nicholas MacKinnon, Daniel L Farkas, Babak Kateb
Advances in image-guided therapy enable physicians to obtain real-time information on neurological disorders such as brain tumors to improve resection accuracy. Image guidance data include the location, size, shape, type, and extent of tumors. Recent technological advances in neurophotonic engineering have enabled the development of techniques for minimally invasive neurosurgery. Incorporation of these methods in intraoperative imaging decreases surgical procedure time and allows neurosurgeons to find remaining or hidden tumor or epileptic lesions...
January 2017: Neurophotonics
https://www.readbyqxmd.com/read/28027692/comparison-of-3d-printed-poly-%C3%A9-caprolactone-scaffolds-functionalized-with-tricalcium-phosphate-hydroxyapatite-bio-oss-or-decellularized-bone-matrix
#4
Ethan Nyberg, Alexandra Rindone, Amir Dorafshar, Warren L Grayson
Three-dimensional (3D)-printing facilitates rapid, custom manufacturing of bone scaffolds with a wide range of material choices. Recent studies have demonstrated the potential for 3D-printing bioactive (i.e., osteo-inductive) scaffolds for use in bone regeneration applications. In this study, we 3D-printed porous poly-ɛ-caprolactone (PCL) scaffolds using a fused deposition modeling (FDM) process and functionalized them with mineral additives that have been widely used commercially and clinically: tricalcium phosphate (TCP), hydroxyapatite (HA), Bio-Oss (BO), or decellularized bone matrix (DCB)...
February 7, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28001146/development-of-a-high-throughput-ht-raman-spectroscopy-method-for-rapid-screening-of-liquid-blood-plasma-from-prostate-cancer-patients
#5
Dinesh K R Medipally, Adrian Maguire, Jane Bryant, John Armstrong, Mary Dunne, Marie Finn, Fiona M Lyng, Aidan D Meade
Extensive research has been undertaken on the examination of tissue biopsies using vibrational spectroscopic techniques. However, fewer studies have focused on less invasive and commonly acquired blood samples. Recent studies have shown the ability of Raman and Fourier transform infrared (FTIR) spectroscopy to discriminate between non-cancer controls and cancer cases using blood serum or plasma. Even though many studies have proposed Raman spectroscopy as a potential diagnostic tool in various cancers, the Raman spectroscopic technique has not been introduced as a routine clinical technology...
December 21, 2016: Analyst
https://www.readbyqxmd.com/read/27993003/nanoarchitecture-based-sers-for-biomolecular-fingerprinting-and-label-free-disease-markers-diagnosis
#6
Sudarson Sekhar Sinha, Stacy Jones, Avijit Pramanik, Paresh Chandra Ray
Surface-enhanced Raman spectroscopy (SERS) fingerprinting is highly promising for identifying disease markers from complex mixtures of clinical sample, which has the capability to take medical diagnoses to the next level. Although vibrational frequency in Raman spectra is unique for each biomolecule, which can be used as fingerprint identification, it has not been considered to be used routinely for biosensing due to the fact that the Raman signal is very weak. Contemporary SERS has been demonstrated to be an excellent analytical tool for practical label-free sensing applications due its ability to enhance Raman signals by factors of up to 10(8)-10(14) orders of magnitude...
December 20, 2016: Accounts of Chemical Research
https://www.readbyqxmd.com/read/27958542/snapshot-depth-sensitive-raman-spectroscopy-in-layered-tissues
#7
Wei Liu, Yi Hong Ong, Xiao Jun Yu, Jian Ju, Clint Michael Perlaki, Lin Bo Liu, Quan Liu
Depth sensitive Raman spectroscopy has been shown effective in the detection of depth dependent Raman spectra in layered tissues. However, the current techniques for depth sensitive Raman measurements based on fiber-optic probes suffer from poor depth resolution and significant variation in probe-sample contact. In contrast, those lens based techniques either require the change in objective-sample distance or suffer from slow spectral acquisition. We report a snapshot depth-sensitive Raman technique based on an axicon lens and a ring-to-line fiber assembly to simultaneously acquire Raman signals emitted from five different depths in the non-contact manner without moving any component...
December 12, 2016: Optics Express
https://www.readbyqxmd.com/read/27957268/evaluation-of-mineral-content-in-healthy-permanent-human-enamel-by-raman-spectroscopy
#8
Anna Akkus, Asya Akkus, Renato Roperto, Ozan Akkus, Thiago Porto, Sorin Teich, Lisa Lang
BACKGROUND: An understanding of tooth enamel mineral content using a clinically viable method is essential since variations in mineralization may serve as an early precursor of a dental health issues, and may predict progression and architecture of decay in addition to assessing the success and effectiveness of the remineralization strategies. MATERIAL AND METHODS: Twenty two human incisor teeth were obtained in compliance with the NIH guidelines and site specifically imaged with Raman microscope...
December 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27943650/modern-trends-in-biophotonics-for-clinical-diagnosis-and-therapy-to-solve-unmet-clinical-needs
#9
Christoph Krafft
This contribution covers recent original research papers in the biophotonics field. The content is organized into main techniques such as multiphoton microscopy, Raman spectroscopy, infrared spectroscopy, optical coherence tomography and photoacoustic tomography, and their applications in the context of fluid, cell, tissue and skin diagnostics. Special attention is paid to vascular and blood flow diagnostics, photothermal and photodynamic therapy, tissue therapy, cell characterization, and biosensors for biomarker detection...
December 2016: Journal of Biophotonics
https://www.readbyqxmd.com/read/27933211/systematic-review-and-quality-analysis-of-emerging-diagnostic-measures-for-calcium-pyrophosphate-crystal-deposition-disease
#10
Y Wu, K Chen, R Terkeltaub
OBJECTIVES: Calcium pyrophosphate crystal deposition disease (CPPD) is common, yet prevalence and overall clinical impact remain unclear. Sensitivity and specificity of CPPD reference standards (conventional crystal analysis (CCA) and radiography (CR)) were meta-analysed by EULAR (published 2011). Since then, new diagnostic modalities are emerging. Hence, we updated 2009-2016 literature findings by systematic review and evidence grading, and assessed unmet needs. METHODS: We performed systematic search of full papers (PubMed, Scopus/EMBASE, Cochrane 2009-2016 databases)...
2016: RMD Open
https://www.readbyqxmd.com/read/27888307/monitoring-doxorubicin-cellular-uptake-and-trafficking-using-in-vitro-raman-microspectroscopy-short-and-long-time-exposure-effects-on-lung-cancer-cell-lines
#11
Zeineb Farhane, Franck Bonnier, Hugh J Byrne
Raman microspectroscopy is a non-invasive, in vitro analytical tool which is being increasingly explored for its potential in clinical applications and monitoring the uptake, mechanism of action and cellular interaction at a molecular level of chemotherapeutic drugs, ultimately as a potential label-free preclinical screening and companion diagnostic tool. In this study, doxorubicin (DOX), a "gold standard" chemotherapeutic drug, is employed as a model in the in vitro lung cancer cell line A549 in order to demonstrate the potential of Raman microspectroscopy to screen and identify spectroscopic markers of its trafficking and mechanism of action...
November 25, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27878858/non-invasive-tools-for-the-diagnosis-of-cutaneous-melanoma
#12
REVIEW
C Fink, H A Haenssle
BACKGROUND: While the excisional biopsy and histological examination of suspicious lesions remains the current gold standard for diagnosing cutaneous melanoma (CM), there is a demand for more objective and non-invasive examination methods that may support clinicians in their decision when to biopsy or not. METHODS: This review is based on publications and guidelines retrieved by a selective search in PubMed and MEDLINE and focused on non-invasive diagnostic strategies for detecting melanoma...
November 22, 2016: Skin Research and Technology
https://www.readbyqxmd.com/read/27827479/raman-spectroscopy-and-multivariate-analysis-for-the-non-invasive-diagnosis-of-clinically-inconclusive-vulval-lichen-sclerosus
#13
Jonathan Frost, Linmarie Ludeman, Kathryn Hillaby, Robert Gornall, Gavin Lloyd, Catherine Kendall, Angela C Shore, Nick Stone
Vulval lichen sclerosus (LS) is a common inflammatory condition associated with an increased risk of developing vulval carcinoma. Diagnosis is usually clinical although biopsy is necessary if the diagnosis is uncertain or if there is a failure to respond to adequate initial treatment. Raman spectroscopy has the potential to be applied in vivo for near real time objective non-invasive optical diagnosis, avoiding the need for invasive tissue biopsies. The aim of this study was to evaluate the diagnostic performance of Raman spectroscopy for differentiating LS from other vulval conditions in fresh vulval biopsies...
November 9, 2016: Analyst
https://www.readbyqxmd.com/read/27804917/a-review-of-raman-spectroscopy-advances-with-an-emphasis-on-clinical-translation-challenges-in-oncology
#14
Michael Jermyn, Joannie Desroches, Kelly Aubertin, Karl St-Arnaud, Wendy-Julie Madore, Etienne De Montigny, Marie-Christine Guiot, Dominique Trudel, Brian C Wilson, Kevin Petrecca, Frederic Leblond
There is an urgent need for improved techniques for disease detection. Optical spectroscopy and imaging technologies have potential for non- or minimally-invasive use in a wide range of clinical applications. The focus here, in vivo Raman spectroscopy (RS), measures inelastic light scattering based on interaction with the vibrational and rotational modes of common molecular bonds in cells and tissue. The Raman 'signature' can be used to assess physiological status and can also be altered by disease. This information can supplement existing diagnostic (e...
November 2, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27768147/near-infrared-photothermal-therapy-of-prussian-blue-functionalized-lanthanide-ion-doped-inorganic-plasmonic-multifunctional-nanostructures-for-the-selective-targeting-of-her2-expressing-breast-cancer-cells
#15
Abdul K Parchur, Qifei Li, Anhong Zhou
We report the synthesis, characterization, and application of Prussian blue (PB) functionalized CaMoO4:Eu@SiO2@Au nanorod hybrid nanoparticles (HNPs), with multimodal capabilities such as fluorescence imaging, surface-enhanced Raman spectroscopy (SERS) detection and photothermal therapy (PTT). The average size of CaMoO4:Eu@SiO2 NPs was 206 nm. The HNPs are highly dispersible in water for several weeks without settling and show a strong absorption in the near-infrared region, overlapping with the PB absorption between 600 nm and 1000 nm and the surface plasmon resonance of Au nanorods around 800 nm...
November 15, 2016: Biomaterials Science
https://www.readbyqxmd.com/read/27717152/toward-precision-medicine-a-cancer-molecular-subtyping-nano-strategy-for-rna-biomarkers-in-tumor-and-urine
#16
Kevin M Koo, Eugene J H Wee, Paul N Mainwaring, Yuling Wang, Matt Trau
Cancer is a heterogeneous disease which manifests as different molecular subtypes due to the complex nature of tumor initiation, progression, and metastasis. The concept of precision medicine aims to exploit this cancer heterogeneity by incorporating diagnostic technology to characterize each cancer patient's molecular subtype for tailored treatments. To characterize cancer molecular subtypes accurately, a suite of multiplexed bioassays have currently been developed to detect multiple oncogenic biomarkers. Despite the reliability of current multiplexed detection techniques, novel strategies are still needed to resolve limitations such as long assay time, complex protocols, and difficulty in interpreting broad overlapping spectral peaks of conventional fluorescence readouts...
December 2016: Small
https://www.readbyqxmd.com/read/27714998/prominent-vascularization-capacity-of-mesenchymal-stem-cells-in-collagen-gold-nanocomposites
#17
Shuchen Hsieh, Hui-Jye Chen, Shan-Hui Hsu, Yi-Chun Yang, Cheng-Ming Tang, Mei-Yun Chu, Pei-Ying Lin, Ru-Huei Fu, Mei-Lang Kung, Yun-Wen Chen, Bi-Wen Yeh, Huey-Shan Hung
The ideal characteristics of surface modification on the vascular graft for clinical application would be with excellent hemocompatibility, endothelialization capacity, and anti-restenosis ability. Here, Fourier transform infrared spectroscopy (FTIR), surface enhanced raman spectroscopy (SERS), atomic force microscopy (AFM), contact angle () measurement, and thermogravimetric analyzer (TGA) were used to evaluate the chemical and mechanical properties of collagen-gold nanocomposites (collagen+Au) with 17...
October 7, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27704083/fiber-enhanced-raman-spectroscopic-analysis-as-a-novel-method-for-diagnosis-and-monitoring-of-diseases-related-to-hyperbilirubinemia-and-hyperbiliverdinemia
#18
Di Yan, Christian Domes, Robert Domes, Timea Frosch, Jürgen Popp, Mathias W Pletz, Torsten Frosch
Fiber enhanced resonance Raman spectroscopy (FERS) is introduced for chemically selective and ultrasensitive analysis of the biomolecules hematin, hemoglobin, biliverdin, and bilirubin. The abilities for analyzing whole intact, oxygenated erythrocytes are proven, demonstrating the potential for the diagnosis of red blood cell related diseases, such as different types of anemia and hemolytic disorders. The optical fiber enables an efficient light-guiding within a miniaturized sample volume of only a few micro-liters and provides a tremendously improved analytical sensitivity (LODs of 0...
October 17, 2016: Analyst
https://www.readbyqxmd.com/read/27596041/raman-spectroscopic-analysis-reveals-abnormal-fatty-acid-composition-in-tumor-micro-and-macroenvironments-in-human-breast-and-rat-mammary-cancer
#19
Sixian You, Haohua Tu, Youbo Zhao, Yuan Liu, Eric J Chaney, Marina Marjanovic, Stephen A Boppart
Fatty acids play essential roles in the growth and metastasis of cancer cells. To facilitate their avid growth and proliferation, cancer cells not only alter the fatty acid synthesis and metabolism intracellularly and extracellularly, but also in the macroenvironment via direct or indirect pathways. We report here, using Raman micro-spectroscopy, that an increase in the production of polyunsaturated fatty acids (PUFAs) was identified in both cancerous and normal appearing breast tissue obtained from breast cancer patients and tumor-bearing rats...
September 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27524021/protein-adsorption-capability-on-polyurethane-and-modified-polyurethane-membrane-for-periodontal-guided-tissue-regeneration-applications
#20
Zeeshan Sheikh, Abdul Samad Khan, Nima Roohpour, Michael Glogauer, Ihtesham U Rehman
Periodontal disease if left untreated can result in creation of defects within the alveolar ridge. Barrier membranes are frequently used with or without bone replacement graft materials for achieving periodontal guided tissue regeneration (GTR). Surface properties of barrier membranes play a vital role in their functionality and clinical success. In this study polyetherurethane (PEU) membranes were synthesized by using 4,4'-methylene-diphenyl diisocyanate (MDI), polytetramethylene oxide (PTMO) and 1,4-butane diol (BDO) as a chain extender via solution polymerization...
November 1, 2016: Materials Science & Engineering. C, Materials for Biological Applications
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