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Kumar Barik A, Mathew C, Sanoop PM, John RV, Adigal SS, Bhat S, Pai KM, Bhandary SV, Devasia T, Upadhya R, Kartha VB, Chidangil S. Protein profile pattern analysis: A multifarious, in vitro diagnosis technique for universal screening. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1232:123944. [PMID: 38056315 DOI: 10.1016/j.jchromb.2023.123944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/08/2023]
Abstract
Universal health care is attracting increased attention nowadays, because of the large increase in population all over the world, and a similar increase in life expectancy, leading to an increase in the incidence of non-communicable (various cancers, coronary diseases, neurological and old-age-related diseases) and communicable diseases/pandemics like SARS-COVID 19. This has led to an immediate need for a healthcare technology that should be cost-effective and accessible to all. A technology being considered as a possible one at present is liquid biopsy, which looks for markers in readily available samples like body fluids which can be accessed non- or minimally- invasive manner. Two approaches are being tried now towards this objective. The first involves the identification of suitable, specific markers for each condition, using established methods like various Mass Spectroscopy techniques (Surface-Enhanced Laser Desorption/Ionization Mass Spectroscopy (SELDI-MS), Matrix-Assisted Laser Desorption/Ionization (MALDI-MS), etc., immunoassays (Enzyme-Linked Immunoassay (ELISA), Proximity Extension Assays, etc.) and separation methods like 2-Dimensional Polyacrylamide Gel Electrophoresis (2-D PAGE), Sodium Dodecyl-Sulfate Polyacrylamide Gel Electrophoresis (SDS-PAGE), Capillary Electrophoresis (CE), etc. In the second approach, no attempt is made the identification of specific markers; rather an efficient separation method like High-Performance Liquid Chromatography/ Ultra-High-Performance Liquid Chromatography (HPLC/UPLC) is used to separate the protein markers, and a profile of the protein pattern is recorded, which is analysed by Artificial Intelligence (AI)/Machine Learning (MI) methods to derive characteristic patterns and use them for identifying the disease condition. The present report gives a summary of the current status of these two approaches and compares the two in the use of their suitability for universal healthcare.
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Affiliation(s)
- Ajaya Kumar Barik
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Clint Mathew
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Pavithran M Sanoop
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Reena V John
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Sphurti S Adigal
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Sujatha Bhat
- Division of Microbiology, Department of Basic Medical Sciences, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Keerthilatha M Pai
- Department of Dental Surgery, Sikkim Manipal Institute of Medical Sciences, Sikkim Manipal University, Gangtok, Sikkim 737102, India
| | - Sulatha V Bhandary
- Department of Ophthalmology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Tom Devasia
- Department of Cardiology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Rekha Upadhya
- Department of Obstetrics and Gynecology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
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Pavithran M S, Lukose J, Barik BK, Periasami A, Kartha VB, Chawla A, Chidangil S. Laser induced fluorescence spectroscopy analysis of kidney tissues: A pilot study for the identification of renal cell carcinoma. J Biophotonics 2023; 16:e202300021. [PMID: 37589180 DOI: 10.1002/jbio.202300021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 07/31/2023] [Accepted: 08/15/2023] [Indexed: 08/18/2023]
Abstract
The 325 nm-excited autofluorescence spectra from cancerous and normal renal tissues were collected ex vivo biopsy tissue samples, through an optical fiber probe-based system. Noticeable changes in intensity/wavelength were observed in the fluorescence emissions from endogenous fluorophores such as collagen, Nicotinamide adenine dinucleotide (NADH), Vitamin A (retinol), and flavin adenine dinucleotide, in pathological conditions with respect to the normal state. The energy metabolism involved in clear cell renal cell carcinoma (ccRCC) and chromophobe renal cell carcinoma (chRCC) are reflected in the fluorescence emission band at 445 nm due to bound NADH attributed to enhanced oxidative phosphorylation in chRCC and emission at 465 nm contributed by free NADH showing higher glycolytic action in ccRCC. The principal component analysis and one-way ANOVA effectively discriminate ccRCC from chRCC. It is shown that laser induced fluorescence technique with 325 nm excitation can be a suitable technique for optical pathology and in vivo surgical boundary demarcation in renal cell carcinoma.
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Affiliation(s)
- Sanoop Pavithran M
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, India
| | - Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, India
| | - Bijay Kumar Barik
- Department of Biochemistry, Cell Biology and Genetics, College Medicine, American University of Antigua, Cell Biology and Genetics, American University of Antigua, College of Medicine, St. John's, Antigua and Barbuda
| | - Ammasi Periasami
- W.M. Keck Center for Cellular Imaging (KCCI), Biology, University of Virginia, Charlottesville, Virginia, USA
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, India
| | - Arun Chawla
- Department of Urology, Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal, India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, India
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Adigal SS, Bhandary SV, Hegde N, Nidheesh VR, John RV, Rizvi A, George SD, Kartha VB, Chidangil S. Correction: Protein profile analysis of tear fluid with hyphenated HPLC-UV LED-induced fluorescence detection for the diagnosis of dry eye syndrome. RSC Adv 2023; 13:27446. [PMID: 37711369 PMCID: PMC10498426 DOI: 10.1039/d3ra90084c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 08/31/2023] [Indexed: 09/16/2023] Open
Abstract
[This corrects the article DOI: 10.1039/D3RA04389D.].
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Affiliation(s)
- Sphurti S Adigal
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Sulatha V Bhandary
- Department of Ophthalmology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education Manipal Karnataka India-567104
| | - Nagaraj Hegde
- Ato-gear BV Schimmelt 28 5611 ZX Eindhoven Netherlands
| | - V R Nidheesh
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Reena V John
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Alisha Rizvi
- Department of Ophthalmology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education Manipal Karnataka India-567104
| | - Sajan D George
- Centre for Applied Nanoscience, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 567104
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
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Vaisakh PS, Adarsh UK, Amrutha K, Warrier AK, Kartha VB, Unnikrishnan VK. Integrated LIBS-Raman spectroscopy: A comprehensive approach to monitor microplastics and heavy metal contamination in water resources. Environ Res 2023; 231:116198. [PMID: 37209978 DOI: 10.1016/j.envres.2023.116198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/29/2023] [Accepted: 05/17/2023] [Indexed: 05/22/2023]
Abstract
The increased use of plastic products and global industrial conditions have contaminated natural resources, especially water, with pollutants such as microplastics and trace elements, including heavy metals. Hence, continuous monitoring of water samples is an urgent requirement. However, the existing microplastic-heavy metal monitoring methodologies require discrete and sophisticated sampling approaches. The article proposes a multi-modal LIBS-Raman spectroscopy system for detecting microplastics and heavy metals from water resources with unified sampling and pre-processing approaches. The accomplishment of the detection process is using a single instrument by exploiting the trace element affinity of microplastics, which operates in an integrated methodology to monitor water samples for microplastic-heavy metal contamination. The polypropylene (PP), polyethylene (PE), and polyethylene terephthalate (PET) plastic types dominate the identified microplastics from different sampling spots: in an estuary formed by the Swarna River near Kalmadi (Malpe) in Udupi district, and from River Netravathi in Mangalore, Dakshina Kannada District, Karnataka, India. The detected trace elements from microplastic surfaces include heavy metals such as Al, Zn, Cu, Ni, Mn, and Cr and other elements counting Na, Mg, Ca, and Li. The system could record concentrations of trace elements down to 10 ppm, and comparing results with the conventional technique of Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES) confirms the ability of the system to detect trace elements from microplastic surfaces. In addition, comparing results with direct LIBS analysis of water from the sampling site shows better results in microplastic-based trace element detection.
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Affiliation(s)
- P S Vaisakh
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - U K Adarsh
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - K Amrutha
- Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Anish Kumar Warrier
- Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, India; Centre for Climate Studies, Manipal Academy of Higher Education, Manipal, 576104, India
| | - V B Kartha
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - V K Unnikrishnan
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
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Adigal SS, Bhandary SV, Hegde N, Nidheesh VR, John RV, Rizvi A, George SD, Kartha VB, Chidangil S. Protein profile analysis of tear fluid with hyphenated HPLC-UV LED-induced fluorescence detection for the diagnosis of dry eye syndrome. RSC Adv 2023; 13:22559-22568. [PMID: 37501778 PMCID: PMC10369224 DOI: 10.1039/d3ra04389d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 07/12/2023] [Indexed: 07/29/2023] Open
Abstract
Tear fluid contains organic and inorganic constituents, variations in their relative concentrations could provide valuable information and can be useful for the detection of several ophthalmological diseases. This report describes the application of the lab-assembled light-emitting diode (LED)-based high-performance liquid chromatography system for protein profiling of tear fluids to diagnose dry eye disease. Principal Component Analysis (PCA), match/no-match, and Artificial Neural Network (ANN) based binary classification of protein profile data were performed for disease diagnosis. Results from the match/no-match test of the protein profile data showed 94.4% sensitivity and 87.8% specificity. ANN with the leaving one out procedure has given 91.6% sensitivity and 93.9% specificity.
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Affiliation(s)
- Sphurti S Adigal
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Sulatha V Bhandary
- Department of Ophthalmology, Kasturba Medical College Manipal Karnataka India 576104
| | - Nagaraj Hegde
- Ato-gear BV Schimmelt 28 5611 ZX Eindhoven Netherlands
| | - V R Nidheesh
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Reena V John
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Alisha Rizvi
- Department of Ophthalmology, Kasturba Medical College Manipal Karnataka India 576104
| | - Sajan D George
- Centre for Applied Nanotechnology, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 567104
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education Manipal Karnataka India 576104
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John RV, Devasia T, Adigal SS, Lukose J, Kartha VB, Chidangil S. Serum protein profile study of myocardial infarction using a LED induced fluorescence based HPLC system. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1217:123616. [PMID: 36796215 DOI: 10.1016/j.jchromb.2023.123616] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/10/2023] [Accepted: 01/21/2023] [Indexed: 02/12/2023]
Abstract
Cardiovascular diseases (CVDs) are the major health conditions for high mortality and morbidity in humans. Delay in the diagnosis of CVDs effect patients long and short-term health condition. In -house assembled UV-light emitting diode (LED) based fluorescence detector for high -performance liquid chromatography (HPLC) (HPLC-LED-IF) system is used to record serum chromatograms of three categories of samples namely, before medicated- myocardial infarction (B-MI), after medicated- MI (A-MI), and normal. The sensitivity and performance of HPLC-LED-IF system is estimated using commercial serum proteins. Statistical analysis tools like, descriptive statistics, principal component analysis (PCA), and Match/ No Match test were applied to visualize the variation in three groups of samples. Statistical analysis of the protein profile data showed fairly good discrimination among the three categories. The receiver operating characteristic (ROC) curve also supported the reliability of the method to diagnose MI.
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Affiliation(s)
- Reena V John
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Tom Devasia
- Department of Cardiology, Kasturba Medical College, Manipal, Karnataka 576104, India
| | - Sphurti S Adigal
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
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Barik AK, M SP, Lukose J, Upadhya R, Pai MV, Kartha VB, Chidangil S. In vivo spectroscopy: optical fiber probes for clinical applications. Expert Rev Med Devices 2022; 19:657-675. [PMID: 36175393 DOI: 10.1080/17434440.2022.2130046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Fiber optic probe based in-vivo spectroscopy techniques are fast and highly objective methods for intraoperative diagnoses and minimally invasive surgical interventions for all procedures where endoscopic observations are carried out for cancers of different types. The Raman spectral features provide molecular fingerprint-type information and can reveal the subjects' pathological state in label-free manner, making endoscopy multiplexed fiber optic probe-based devices with the potential for translation from bench to bedside for routine applications. AREAS COVERED This review provides a general overview of different fiber-optic probes for in-vivo measurements with emphasis on Raman spectroscopy for biomedical application. Various aspects such as fiber-optic probe, radiation source, detector, and spectrometer for extracting optimum spectral features have also been discussed. EXPERT OPINION : Optical spectroscopy-based fiber probe systems with "Chip-on-Tip" technology, combined with machine learning, can in the near future, become a complimentary diagnostic tool to magnetic resonance imaging (MRI), computed tomography (CT) scan, ultrasound, etc. Hyperspectral imaging and fluorescence-based devices are in the advanced stage of technology readiness level (TRL), and with advances in lasers and miniature spectroscopy systems, probe-based Raman devices are also coming up.
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Affiliation(s)
- Ajaya Kumar Barik
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education -576104, Manipal, India
| | - Sanoop Pavithran M
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education -576104, Manipal, India
| | - Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education -576104, Manipal, India
| | - Rekha Upadhya
- Department of Obstetrics and Gynaecology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education -576104, Manipal, India
| | - Muralidhar V Pai
- Department of Obstetrics and Gynaecology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education -576104, Manipal, India
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education -576104, Manipal, India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education -576104, Manipal, India
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John RV, Devasiya T, V.R. N, Adigal S, Lukose J, Kartha VB, Chidangil S. Cardiovascular biomarkers in body fluids: progress and prospects in optical sensors. Biophys Rev 2022; 14:1023-1050. [PMID: 35996626 PMCID: PMC9386656 DOI: 10.1007/s12551-022-00990-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 07/28/2022] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular diseases (CVD) are the major causative factors for high mortality and morbidity in developing and developed nations. The biomarker detection plays a crucial role in the early diagnosis of several non-infectious and life-threatening diseases like CVD and many cancers, which in turn will help in more successful therapy, reducing the mortality rate. Biomarkers have diagnostic, prognostic and therapeutic significances. The search for novel biomarkers using proteomics, bio-sensing, micro-fluidics, and spectroscopic techniques with good sensitivity and specificity for CVD is progressing rapidly at present, in addition to the use of gold standard biomarkers like troponin. This review is dealing with the current progress and prospects in biomarker research for the diagnosis of cardiovascular diseases. Expert opinion. Fast diagnosis of cardiovascular diseases (CVDs) can help to provide rapid medical intervention, which can affect the patient’s short and long-term health. Identification and detection of proper biomarkers for early diagnosis are crucial for successful therapy and prognosis of CVDs. The present review discusses the analysis of clinical samples such as whole blood, blood serum, and other body fluids using techniques like high-performance liquid chromatography-LASER/LED-induced fluorescence, Raman spectroscopy, mainly, optical methods, combined with nanotechnology and micro-fluidic technologies, to probe patterns of multiple markers (marker signatures) as compared to conventional techniques.
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Affiliation(s)
- Reena V. John
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - Tom Devasiya
- Department of Cardiology, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - Nidheesh V.R.
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - Sphurti Adigal
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - V. B. Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka India 576104
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Adarsh UK, Bhoje Gowd E, Bankapur A, Kartha VB, Chidangil S, Unnikrishnan VK. Development of an inter-confirmatory plastic characterization system using spectroscopic techniques for waste management. Waste Manag 2022; 150:339-351. [PMID: 35907331 DOI: 10.1016/j.wasman.2022.07.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 07/13/2022] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
Ever-accumulating amounts of plastic waste raises alarming concern over environmental and public health. A practical solution for addressing this threat is recycling, and the success of an industry-oriented plastic recycling system relies greatly on the accuracy of the waste sorting technique adapted. We propose a multi-modal spectroscopic sensor which combines laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy in a single optical platform for characterizing plastics based on elemental and molecular information to assist the plastic identification-sorting process in recycling industries. The unique geometry of the system makes it compact and cost-effective for dual spectroscopy. The performance of the system in classifying industrially important plastic classes counting PP, PC, PLA, Nylon-1 1, and PMMA is evaluated, followed by the application of the same in real-world plastics comprising PET, HDPE, and PP in different chemical-physical conditions where the system consumes less than 30 ms for acquiring LIBS-Raman signals. The evaluation of the system in characterizing commuting samples shows promising results to be applied in industrial conditions in future. The study on effect of physical-chemical conditions of plastic wastes in characterizing them using the system shows the necessity for combining multiple techniques together. The proposal is not to determine the paramount methodology to characterize and sort plastics, but to demonstrate the advantages of dual-spectroscopy sensors in such applications. The outcomes of the study suggest that the system developed herein has the potential of emerging as an industrial-level plastic waste sorting sensor.
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Affiliation(s)
- U K Adarsh
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - E Bhoje Gowd
- Material Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695 019, Kerala, India
| | - Aseefhali Bankapur
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - V B Kartha
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Santhosh Chidangil
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - V K Unnikrishnan
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India; Centre of Excellence for Biophotonics, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.
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Lukose J, Barik A, Unnikrishnan VK, George SD, Kartha VB, Chidangil S. Development of a spectroscopic technique that enables the saliva based detection of COVID-19 at safe distances. Results Chem 2021; 3:100210. [PMID: 34642620 PMCID: PMC8500476 DOI: 10.1016/j.rechem.2021.100210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/17/2021] [Accepted: 10/02/2021] [Indexed: 01/29/2023] Open
Abstract
Research activities are in full swing globally to translate the use of saliva as a non-invasive and highly potential specimen for clinical diagnostics, particularly for COVID-19 detection. Being comprised of a pool of biomarkers also enriched with ACE-2 receptors, saliva can provide vital information regarding the state of the human body. Advancements in biophotonics tools for saliva investigation may offer promise for developing rapid, highly objective, optical modalities for COVID- 19 detection. This article presents concept/design study, which propose the use of Raman/laser induced fluorescence spectroscopic device that have the potential for viral detection via saliva from a safer distance. Noticeable changes of biomarkers present in saliva in response to viral infection can reflect the pathological state, thus can altogether affect the Raman spectral pattern. Monitoring these spectral patterns of saliva, which are further enhanced by using cost effective and reproducible Surface Enhanced Raman Spectroscopy substrates can be a viable option for sensitive and non-invasive viral detection. The spectral information acquired from the optical device can be processed using various multivariate statistical analytical tools, which ultimately facilitate effective viral detection in few minutes. This method doesn't demand the necessity of qualified professionals and sample processing with reagents unlike in RT-PCR test. The proposed optical device can be further modified into a portable form, which can be easily transported for field applications. The stand-off observation, contactless and highly non-invasive technique can be of paramount importance in the current context, where the safer screening of a large population for viral infection by maintaining social distances is a necessity. The proposed stand-off spectroscopic technique can also address the major concern of nosocomial viral transmission amongst healthcare workers during sample collection in a pandemic scenario.
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Affiliation(s)
- Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
| | - Ajayakumar Barik
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
| | - V K Unnikrishnan
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
| | - Sajan D George
- Centre for Applied Nanosciences, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
| | - V B Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104 India
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Lukose J, M. SP, N. M, Barik AK, Pai KM, Unnikrishnan VK, George SD, Kartha VB, Chidangil S. Photonics of human saliva: potential optical methods for the screening of abnormal health conditions and infections. Biophys Rev 2021; 13:359-385. [PMID: 34093888 PMCID: PMC8170462 DOI: 10.1007/s12551-021-00807-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 05/07/2021] [Indexed: 12/12/2022] Open
Abstract
Human saliva can be treated as a pool of biological markers able to reflect on the state of personal health. Recent years have witnessed an increase in the use of optical devices for the analysis of body fluids. Several groups have carried out studies investigating the potential of saliva as a non-invasive and reliable clinical specimen for use in medical diagnostics. This brief review aims to highlight the optical technologies, mainly surface plasmon resonance (SPR), Raman, and Fourier transform infrared (FTIR) spectroscopy, which are being used for the probing of saliva for diverse biomedical applications. Advances in bio photonics offer the promise of unambiguous, objective and fast detection of abnormal health conditions and viral infections (such as COVID-19) from the analysis of saliva.
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Affiliation(s)
- Jijo Lukose
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Sanoop Pavithran M.
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Mithun N.
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Ajaya Kumar Barik
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Keerthilatha M. Pai
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - V. K. Unnikrishnan
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Sajan D. George
- Centre for Applied Nanoscience, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - V. B. Kartha
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
| | - Santhosh Chidangil
- Centre of Excellence for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104 India
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Rao S, John R, Patil A, K. UV, George SD, Pai KM, Ongole R, Devasia T, Kartha VB, Chidangil S. Optical Biopsy and Optical Pathology: Affordable Health Care Under Low-Resource Settings. J-BPE 2020. [DOI: 10.18287/jbpe20.06.020309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Muhammed Shameem KM, Dhanada VS, Unnikrishnan VK, George SD, Kartha VB, Santhosh C. A hyphenated echelle LIBS-Raman system for multi-purpose applications. Rev Sci Instrum 2018; 89:073108. [PMID: 30068097 DOI: 10.1063/1.5024966] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We have developed and standardized a novel hybrid laser-induced breakdown spectroscopy (LIBS)-Raman system using a single pulsed laser and a high-resolution intensified charge coupled device coupled echelle spectrograph. LIBS and Raman spectroscopy are highly complementary techniques which yield elemental and molecular information. Both techniques share an apparently similar instrumental configuration but need entirely different requirements like spectral range covered, resolution, and light-gathering efficiencies. There are thus many challenges to be faced in developing a combined system. In the present work, we show that an echelle spectrograph combined with a compact Q-switched Nd:YAG laser operating at 532 nm as an excitation source in a portable configuration can be efficiently used for such multi-purpose spectroscopy. Atomic and molecular emissions from the sample surface have been recorded in a gated mode using this setup. Compared to conventional spectrographs, echelle provides simultaneous broad bandpass (250-900 nm) and better spectral resolution at an extremely small fixed slit width of 10 × 50 μm without moving the dispersive elements. The echelle-based hyphenated system provides fast and reliable analysis of materials with combined atomic and molecular spectra of the same spot with better reliability. In this paper, we discuss the optimization of various instrumental parameters and optical components of this hyphenated system using a medium Raman cross section sample, CaCO3. The feasibility of single shot LIBS-Raman measurement capabilities of echelle has also been demonstrated using the developed system.
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Affiliation(s)
- K M Muhammed Shameem
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
| | - V S Dhanada
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
| | - V K Unnikrishnan
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
| | - Sajan D George
- Centre for Applied Nanosciences, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
| | - V B Kartha
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
| | - C Santhosh
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576 104, India
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Muhammed Shameem KM, Chawla A, Mallya M, Barik BK, Unnikrishnan VK, Kartha VB, Santhosh C. Laser-induced breakdown spectroscopy-Raman: An effective complementary approach to analyze renal-calculi. J Biophotonics 2018; 11:e201700271. [PMID: 29411942 DOI: 10.1002/jbio.201700271] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 02/02/2018] [Indexed: 05/24/2023]
Abstract
Presence of renal-calculi (kidney stones) in human urethra is being increasingly diagnosed over the last decade and is considered as one of the most painful urological disorders. Accurate analysis of such stones plays a vital role in the evaluation of urolithiasis patients and in turn helps the clinicians toward exact etiologies. Two highly complementary laser-based analytical techniques; laser-induced breakdown spectroscopy (LIBS) and micro-Raman spectroscopy have been used to identify the chemical composition of different types of renal-calculi. LIBS explores elemental characteristics while Raman spectroscopy provides molecular details of the sample. This complete information on the sample composition might help clinicians to identify the key aspects of the formation of kidney stones, hence assist in therapeutic management and to prevent recurrence. The complementarity of both techniques has been emphasized and discussed. LIBS spectra of different types of stones suggest the probable composition of it by virtue of the major, minor and trace elements detected from the sample. However, it failed to differentiate the crystalline form of different hydrates of calcium oxalate stone. This lacuna was overcome by the use of Raman spectroscopy and these results are compared with conventional chemical analysis.
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Affiliation(s)
- K M Muhammed Shameem
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - Arun Chawla
- Department of Urology, Kasturba Medical College, Manipal, India
| | | | | | - V K Unnikrishnan
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - V B Kartha
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104, India
| | - C Santhosh
- Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576 104, India
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Shameem KMM, Choudhari KS, Bankapur A, Kulkarni SD, Unnikrishnan VK, George SD, Kartha VB, Santhosh C. A hybrid LIBS-Raman system combined with chemometrics: an efficient tool for plastic identification and sorting. Anal Bioanal Chem 2017; 409:3299-3308. [PMID: 28321503 DOI: 10.1007/s00216-017-0268-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/12/2017] [Accepted: 02/20/2017] [Indexed: 11/30/2022]
Abstract
Classification of plastics is of great importance in the recycling industry as the littering of plastic wastes increases day by day as a result of its extensive use. In this paper, we demonstrate the efficacy of a combined laser-induced breakdown spectroscopy (LIBS)-Raman system for the rapid identification and classification of post-consumer plastics. The atomic information and molecular information of polyethylene terephthalate, polyethylene, polypropylene, and polystyrene were studied using plasma emission spectra and scattered signal obtained in the LIBS and Raman technique, respectively. The collected spectral features of the samples were analyzed using statistical tools (principal component analysis, Mahalanobis distance) to categorize the plastics. The analyses of the data clearly show that elemental information and molecular information obtained from these techniques are efficient for classification of plastics. In addition, the molecular information collected via Raman spectroscopy exhibits clearly distinct features for the transparent plastics (100% discrimination), whereas the LIBS technique shows better spectral feature differences for the colored samples. The study shows that the information obtained from these complementary techniques allows the complete classification of the plastic samples, irrespective of the color or additives. This work further throws some light on the fact that the potential limitations of any of these techniques for sample identification can be overcome by the complementarity of these two techniques. Graphical Abstract ᅟ.
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Affiliation(s)
- K M Muhammed Shameem
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - Khoobaram S Choudhari
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - Aseefhali Bankapur
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - Suresh D Kulkarni
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - V K Unnikrishnan
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India.
| | - Sajan D George
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - V B Kartha
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
| | - C Santhosh
- Department of Atomic and Molecular Physics, Manipal University, LG-01, AB-05 MIT Campus Manipal, Manipal, 576 104, Karnataka, India
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Patil A, Bhat S, Pai KM, Rai L, Kartha VB, Chidangil S. Ultra-sensitive high performance liquid chromatography-laser-induced fluorescence based proteomics for clinical applications. J Proteomics 2015; 127:202-10. [PMID: 25979166 DOI: 10.1016/j.jprot.2015.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/18/2015] [Accepted: 05/06/2015] [Indexed: 11/20/2022]
Abstract
UNLABELLED An ultra-sensitive high performance liquid chromatography-laser induced fluorescence (HPLC-LIF) based technique has been developed by our group at Manipal, for screening, early detection, and staging for various cancers, using protein profiling of clinical samples like, body fluids, cellular specimens, and biopsy-tissue. More than 300 protein profiles of different clinical samples (serum, saliva, cellular samples and tissue homogenates) from volunteers (normal, and different pre-malignant/malignant conditions) were recorded using this set-up. The protein profiles were analyzed using principal component analysis (PCA) to achieve objective detection and classification of malignant, premalignant and healthy conditions with high sensitivity and specificity. The HPLC-LIF protein profiling combined with PCA, as a routine method for screening, diagnosis, and staging of cervical cancer and oral cancer, is discussed in this paper. BIOLOGICAL SIGNIFICANCE In recent years, proteomics techniques have advanced tremendously in life sciences and medical sciences for the detection and identification of proteins in body fluids, tissue homogenates and cellular samples to understand biochemical mechanisms leading to different diseases. Some of the methods include techniques like high performance liquid chromatography, 2D-gel electrophoresis, MALDI-TOF-MS, SELDI-TOF-MS, CE-MS and LC-MS techniques. We have developed an ultra-sensitive high performance liquid chromatography-laser induced fluorescence (HPLC-LIF) based technique, for screening, early detection, and staging for various cancers, using protein profiling of clinical samples like, body fluids, cellular specimens, and biopsy-tissue. More than 300 protein profiles of different clinical samples (serum, saliva, cellular samples and tissue homogenates) from healthy and volunteers with different malignant conditions were recorded by using this set-up. The protein profile data were analyzed using principal component analysis (PCA) for objective classification and detection of malignant, premalignant and healthy conditions. The method is extremely sensitive to detect proteins with limit of detection of the order of femto-moles. The HPLC-LIF combined with PCA as a potential proteomic method for the diagnosis of oral cancer and cervical cancer has been discussed in this paper. This article is part of a Special Issue entitled: Proteomics in India.
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Affiliation(s)
- Ajeetkumar Patil
- Dept. of Atomic and Molecular Physics, Manipal University, Manipal, Karnataka, India
| | - Sujatha Bhat
- Dept. of Microbiology, Melaka Manipal Medical College, Manipal University, Manipal, India
| | - Keerthilatha M Pai
- Dept. of Oral Medicine and Radiology, Manipal College of Dental Sciences, Manipal, India
| | - Lavanya Rai
- Dept. of Obstetrics and Gynaecology, Kasturba Medical College, Manipal, India
| | - V B Kartha
- 21, Udayagiri, Sion, Trombay, Mumbai, India
| | - Santhosh Chidangil
- Dept. of Atomic and Molecular Physics, Manipal University, Manipal, Karnataka, India.
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Bhat S, Kartha VB, Rai L, Chidangil S. A Comparison of Protein Profiles of Cervical Tissue Homogenate, Exfoliated Cells from Cervix and Serum in Normal and Cervical Malignancy Conditions. J Chromatogr Sci 2014; 53:167-76. [DOI: 10.1093/chromsci/bmu039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Unnikrishnan VK, Choudhari KS, Kulkarni SD, Nayak R, Kartha VB, Santhosh C. Analytical predictive capabilities of Laser Induced Breakdown Spectroscopy (LIBS) with Principal Component Analysis (PCA) for plastic classification. RSC Adv 2013. [DOI: 10.1039/c3ra44946g] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Patil A, Choudhari KS, Prabhu V, Unnikrishnan VK, Bhat S, Pai KM, Kartha VB, Santhosh C. Highly Sensitive High Performance Liquid Chromatography-Laser Induced Fluorescence for Proteomics Applications. ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/643979] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper describes the sensitivity study and performance evaluation of high-performance liquid chromatography-laser-induced fluorescence detection (HPLC-LIF) system assembled in our laboratory for proteomics applications. The limits of Detection (LOD) of several serum proteins have been estimated with this instrument and are found to be much lower compared to other commonly used proteomics techniques like SELDI, MALDI, 2-D-SDS-PAGE, and so forth. Techniques for improving the LOD still further with similar setup are briefly discussed. Using the system, protein profiles of serum in normal, malignant, and premalignant conditions were recorded for different malignancy situations.
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Affiliation(s)
- Ajeetkumar Patil
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 567104, India
| | - K. S. Choudhari
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 567104, India
| | - Vijendra Prabhu
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 567104, India
| | - V. K. Unnikrishnan
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 567104, India
| | - Sujatha Bhat
- Department of Microbiology, KMC International Center, Manipal 567104, India
| | - Keerthilatha M. Pai
- Department of Oral Medicine and Radiology, Manipal College of Dental Sciences, Manipal 567104, India
| | | | - C. Santhosh
- Centre for Atomic and Molecular Physics, Manipal University, Manipal 567104, India
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Bhat S, Patil A, Rai L, Kartha VB, Chidangil S. Application of HPLC combined with laser induced fluorescence for protein profile analysis of tissue homogenates in cervical cancer. ScientificWorldJournal 2012; 2012:976421. [PMID: 22645492 PMCID: PMC3356758 DOI: 10.1100/2012/976421] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Accepted: 01/02/2012] [Indexed: 11/17/2022] Open
Abstract
A highly objective method, High Performance Liquid Chromatography with Laser Induced Fluorescence (HPLC-LIF) technique was used to study the protein profiles of normal and cervical cancer tissue homogenates. A total of 44 samples including normal cervical biopsy samples from the hysterectomy patients and the patients suffering from different stages of the cervical cancer were recorded by HPLC-LIF and analysed by Principle Component Analysis (PCA) to get statistical information on different tissue components. Discrimination of different stages of the samples was carried out by considering three parameters--scores of factor, spectral residual, and Mahalanobis Distance. Diagnostic accuracy of the method was evaluated using Receiver Operating Characteristic (ROC) analysis, and Youden's index (J) plots. The PCA results showed high sensitivity and specificity (~100) for cervical cancer diagnosis. ROC and Youden's index curves for both normal and malignant standard sets show good diagnostic accuracy with high AUC values. The statistical analysis has shown that the differences in protein profiles can be used to diagnose biochemical changes in the tissue, and thus can be readily applied for the detection of cervical cancer, even in situations where a histopathology examination is not easy because of nonavailability of experienced pathologists.
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Affiliation(s)
- Sujatha Bhat
- KMC International Center, Manipal University, Manipal 576104, India
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Kamath SD, Kartha VB, Mahato KK. Dynamics of L-tryptophan in aqueous solution by simultaneous laser induced fluorescence (LIF) and photoacoustic spectroscopy (PAS). Spectrochim Acta A Mol Biomol Spectrosc 2008; 70:187-94. [PMID: 17822948 DOI: 10.1016/j.saa.2007.06.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2006] [Revised: 05/31/2007] [Accepted: 06/10/2007] [Indexed: 05/17/2023]
Abstract
An experimental system for measuring simultaneously photoacoustic (PA) and fluorescence signals is described. The simultaneous measurement of laser induced fluorescence and photoacoustic signals provide a suitable method for the study of different quenching phenomena occurring in fluorescent systems. In this paper we report tryptophan solvation dynamics in water using fluorescence and photoacoustic spectra recorded simultaneously by photoacoustic and fluorescence signals as functions of concentration, indicate that quantum yield is maximum at low concentrations. Also, the energy lost in the fluorescence path of tryptophan, due to different quenching phenomena like self quenching, Resonance energy transfer (RET), solvation relaxation, etc. is clearly seen from the photoacoustic signal intensity which increases as the fluorescence intensity decreases.
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Affiliation(s)
- Sudha D Kamath
- Centre for Laser Spectroscopy, KMC Life Sciences Centre, Manipal Academy of Higher Education (Deemed University), Manipal 576 104, Karnataka, India
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Vidyasagar MS, Maheedhar K, Vadhiraja BM, Fernendes DJ, Kartha VB, Krishna CM. Prediction of radiotherapy response in cervix cancer by Raman spectroscopy: A pilot study. Biopolymers 2008; 89:530-7. [DOI: 10.1002/bip.20923] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Krishna CM, Sockalingum GD, Vadhiraja BM, Maheedhar K, Rao ACK, Rao L, Venteo L, Pluot M, Fernandes DJ, Vidyasagar MS, Kartha VB, Manfait M. Vibrational spectroscopy studies of formalin-fixed cervix tissues. Biopolymers 2007; 85:214-21. [PMID: 17103423 DOI: 10.1002/bip.20631] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Optical histopathology is fast emerging as a potential tool in cancer diagnosis. Fresh tissues in saline are ideal samples for optical histopathology. However, evaluation of suitability of ex vivo handled tissues is necessitated because of severe constraints in sample procurement, handling, and other associated problems with fresh tissues. Among these methods, formalin-fixed samples are shown to be suitable for optical histopathology. However, it is necessary to further evaluate this method from the point of view discriminating tissues with minute biochemical variations. A pilot Raman and Fourier transform infrared (FTIR) microspectroscopic studies of formalin-fixed tissues normal, malignant, and after-2-fractions of radiotherapy from the same malignant cervix subjects were carried out, with an aim to explore the feasibility of discriminating these tissues, especially the tissues after-2-fractions of radiotherapy from other two groups. Raman and FTIR spectra exhibit large differences for normal and malignant tissues and subtle differences are seen between malignant and after-2-fractions of radiotherapy tissues. Spectral data were analyzed by principal component analysis (PCA) and it provided good discrimination of normal and malignant tissues. PCA of data of three tissues, normal, malignant, and 2-fractions after radiotherapy, gave two clusters corresponding to normal and malignant + after-2-fractions of radiotherapy tissues. A second step of PCA was required to achieve discrimination between malignant and after-2-fractions of radiotherapy tissues. Hence, this study not only further supports the use of formalin-fixed tissues in optical histopathology, especially from Raman spectroscopy point of view, it also indicates feasibility of discriminating tissues with minute biochemical differences such as malignant and after-2-fractions of radiotherapy.
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Affiliation(s)
- C M Krishna
- Center for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal 576 104, Karnataka, India.
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Malini R, Venkatakrishna K, Kurien J, Pai KM, Rao L, Kartha VB, Krishna CM. Discrimination of normal, inflammatory, premalignant, and malignant oral tissue: a Raman spectroscopy study. Biopolymers 2006; 81:179-93. [PMID: 16231284 DOI: 10.1002/bip.20398] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Optical spectroscopy methods are fast emerging as potential alternatives for early diagnosis of cancer. A Raman spectroscopy method for discrimination of normal and malignant oral tissues has been developed by us earlier. It is necessary to evaluate and establish the validity of the approach before it can be routinely used. In the present study, our Raman spectroscopy investigations are extended further to evaluate the efficacy of the technique to discriminate between normal, inflammatory, premalignant, and malignant conditions in oral tissue. Spectral profiles of normal, malignant, premalignant, and inflammatory conditions show pronounced differences between one another. Spectra of normal tissues can be attributed mainly to lipids whereas pathological tissue spectra are dominated by proteins. Principal components analysis (PCA) of the spectral data sets belonging to the four different categories showed that scores of factors differentiated between normal and all pathological conditions but gave only poor discrimination among the three pathological states. PCA combined with multiparameter limit tests allow match/mismatch criteria to be applied to test samples when pathologically certified calibration sets are available in each class. It is shown that by this method all the four tissue types could be discriminated and diagnosed correctly. The biochemical differences between normal and pathological conditions of oral tissue are also discussed from spectral differences of the different classes of spectra.
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Affiliation(s)
- R Malini
- Center for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal, India
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Gupta NM, Kumar D, Kamble VS, Mitra S, Mukhopadhyay R, Kartha VB. Fourier Transform Infrared and Quasielectron Neutron Scattering Studies on the Binding Modes of Methanol Molecules in the Confined Spaces of HMCM-41 and HZSM-5: Role of Pore Structure and Surface Acid Sites. J Phys Chem B 2006; 110:4815-23. [PMID: 16526719 DOI: 10.1021/jp053668e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Quasielastic neutron scattering (QENS) and Fourier transform infrared spectroscopic studies were carried out on methanol molecules adsorbed in HMCM-41 and HZSM-5 molecular sieves to monitor the effect of pore structure on their occluded state under the conditions of ambient temperature and 5-250 mbar pressures. The QENS results have shown that the pore geometry of the host matrix and the dipolar character of the adsorbate are together responsible for the binding state of guest molecules in the confining medium. Thus, neither translational nor free rotational motion was noticed for methanol molecules adsorbed in HZSM-5, in contrast to benzene and cyclohexane molecules of almost similar size that are reported to undergo a rotational motion under the identical conditions of loading (Phys. Chem. Chem. Phys. 2001, 3, 4449; 2003, 5, 3066). In the case of HMCM-41, a translational motion of occluded methanol molecules was clearly observed with a diffusion constant D approximately 1.5 x 10(-5) cm2 s(-1), as compared to a value of D approximately 2.6 x 10(-5) cm2 s(-1) for its liquid state. These results indicate that the adsorbed methanol experiences a considerable extent of supercooling due to capillary condensation in zeolitic pores, giving rise to formation of a metastable state even at room temperature. In HZSM-5, entrapped methanol exists in an almost solidlike state, whereas in HMCM-41, its density lies between that of the solid and the liquid phases. Infrared spectroscopic study conducted using deuterium-labeled adsorbate and host matrixes have given evidence for different kinds of interactions between the methanol molecules and the host matrix, depending upon the loading. For small loadings the internal hydroxy groups within the pore system get perturbed first, giving rise to formation of the methoxy groups. Multilayer adsorption and capillary condensation of methanol occur for a loading of 0.05 mmol per gram and above, within the pore system and also at the external surface, giving rise to a highly compressed state due to strong intermolecular bonding. At the same time, a considerable amount of exchange occurred between the hydroxy groups of the adsorbed methanol and those of the host matrix. Such exchange of hydroxy groups may play an important role in the catalytic properties of the porous aluminosilicates.
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Affiliation(s)
- Narendra M Gupta
- Applied Chemistry and Solid State Physics Divisions, Bhabha Atomic Research Centre, Trombay, Mumbai - 400 085.
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Nayak GS, Kamath S, Pai KM, Sarkar A, Ray S, Kurien J, D'Almeida L, Krishnanand BR, Santhosh C, Kartha VB, Mahato KK. Principal component analysis and artificial neural network analysis of oral tissue fluorescence spectra: Classification of normal premalignant and malignant pathological conditions. Biopolymers 2006; 82:152-66. [PMID: 16470821 DOI: 10.1002/bip.20473] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Pulsed laser-induced autofluorescence spectroscopic studies of pathologically certified normal, premalignant, and malignant oral tissues were carried out at 325 nm excitation. The spectral analysis and classification for discrimination among normal, premalignant, and malignant conditions were performed using principal component analysis (PCA) and artificial neural network (ANN) separately on the same set of spectral data. In case of PCA, spectral residuals, Mahalanobis distance, and scores of factors were used for discrimination among normal, premalignant, and malignant cases. In ANN, parameters like mean, spectral residual, standard deviation, and total energy were used to train the network. The ANN used in this study is a classical multiplayer feed-forward type with a back-propagation algorithm for the training of the network. The specificity and sensitivity were determined in both classification schemes. In the case of PCA, they are 100 and 92.9%, respectively, whereas for ANN they are 100 and 96.5% for the data set considered.
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Affiliation(s)
- G S Nayak
- Department of Electronics and Communication, MIT, Manipal, India
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27
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Murali Krishna C, Kegelaer G, Adt I, Rubin S, Kartha VB, Manfait M, Sockalingum GD. Characterisation of uterine sarcoma cell lines exhibiting MDR phenotype by vibrational spectroscopy. Biochim Biophys Acta Gen Subj 2005; 1726:160-7. [PMID: 16169664 DOI: 10.1016/j.bbagen.2005.08.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Revised: 08/12/2005] [Accepted: 08/18/2005] [Indexed: 11/24/2022]
Abstract
Multidrug resistance (MDR) enables cancer cells to escape cytotoxic insults of anticancer drugs. Rapid identification of cells exhibiting the MDR phenotype is very important since it can lead to an effective and individual patient based treatment plan. We have investigated a combined vibrational spectroscopic approach, using both micro-Raman and FTIR techniques, in order to characterise a sensitive human uterine sarcoma cell line MES-SA and its multidrug-resistant derivative Garf. In this study, these two complementary methods have been evaluated via the use of principal components analysis (PCA), for discrimination of cells exhibiting the MDR phenotype. Our results indicate that, though they inherently have different sensitivities, both Raman and IR methods can provide a good differentiation of cell phenotypes.
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Affiliation(s)
- C Murali Krishna
- Unité MéDIAN, CNRS UMR 6142, UFR de Pharmacie, Université de Reims, 51, rue Cognacq Jay, 51906, REIMS, France
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28
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Krishna CM, Sockalingum GD, Kurien J, Rao L, Venteo L, Pluot M, Manfait M, Kartha VB. Micro-Raman spectroscopy for optical pathology of oral squamous cell carcinoma. Appl Spectrosc 2004; 58:1128-35. [PMID: 15479531 DOI: 10.1366/0003702041959460] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Micro-Raman spectra of formalin-fixed oral squamous normal and carcinoma tissues, stored at room temperature for 2 months, have been recorded. Spectra were recorded both in the epithelial and subepithelial regions of the tissues. No noticeable spectral contamination due to formalin was observed. Very significant differences between spectra of normal epithelial and malignant epithelial samples were found. No such differences in spectra of subepithelial malignant and subepithelial normal samples could be observed. This study shows that spectra from the epithelial region changes drastically because of malignancy-induced biochemical changes in this region. Major differences between normal and malignant spectra seem to arise from the protein composition, conformational/structural changes, and possible increase in protein content in malignant epithelia. The differences between normal epithelial and subepithelial spectra, as expected, arise mainly from the collagen in subepithelial tissue. Principal component analysis of the combined sets of spectra-epithelial and subepithelial, normal and malignant- showed that very good discrimination can be achieved by Raman microspectroscopy. This study thus validates the suitability of formalin-fixed tissues for optical pathology in oral malignancy.
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Affiliation(s)
- C Murali Krishna
- Center for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal-576104, India.
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Manjunath BK, Kurein J, Rao L, Krishna CM, Chidananda MS, Venkatakrishna K, Kartha VB. Autofluorescence of oral tissue for optical pathology in oral malignancy. Journal of Photochemistry and Photobiology B: Biology 2004; 73:49-58. [PMID: 14732251 DOI: 10.1016/j.jphotobiol.2003.09.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pulsed laser-induced-fluorescence studies of pathologically certified oral tissues are carried out at different excitations and time delays. Among the several excitations used, 325 nm produced noticeably different spectral profile for normal and malignant tissues. Extensive curve analysis was carried out in order to understand changes in biochemical composition of tissue based on spectral profiles. Curve resolution and principal component analysis (PCA) show that the fluorescence intensity changes from normal to malignant tissue samples are not completely explained in terms of simple collagen and NAD(P)H intensity changes. The spectra require at least five components to be fully accounted for. Several discrimination methodologies based on PCA and intensity differences between different emission peaks (resultant peaks of curve analysis) were also evaluated. The results obtained indicate PCA using Mahalanobis distance and spectral residual as discrimination parameters provides best discrimination and can be used for matching unknown samples to standard calibration sets. Intensity ratio of bound NAD(P)H to collagen seems to be more suitable for discrimination between normal and malignant oral tissue, compared to ratio of collagen to total intensity of all the other components together.
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Affiliation(s)
- B K Manjunath
- Center for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal 576104, India
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30
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Sajan D, Binoy J, Pradeep B, Venkata Krishna K, Kartha VB, Hubert Joe I, Jayakumar VS. NIR-FT Raman and infrared spectra and ab initio computations of glycinium oxalate. Spectrochim Acta A Mol Biomol Spectrosc 2004; 60:173-180. [PMID: 14670475 DOI: 10.1016/s1386-1425(03)00193-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The single crystals of glycinium oxalate are grown by slow evaporation technique and vibrational spectral analysis is carried out using NIR-FT Raman and FT-IR spectra. The ab initio quantum computations are also performed at HF/6-31 G(d) level to derive the optimized geometry, atomic charges and vibrational frequencies of the glycinium oxalate molecule. Vibrational analysis indicates the presence of peculiar intermolecular C-H...O hydrogen bonding interaction producing "blue shift" of C-H stretching frequency. The vibrational spectra confirm the existence of NH3(+) in glycinium oxalate. Hydroxyl vibrations with different inter and intra molecular H-bonding are analysed, supported by computed results.
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Affiliation(s)
- D Sajan
- Department of Physics, Mar Ivanios College, Thiruvananthapuram 695015, Kerala, India
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31
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Lakshmi RJ, Alexander M, Kurien J, Mahato KK, Kartha VB. Osteoradionecrosis (ORN) of the mandible: a laser Raman spectroscopic study. Appl Spectrosc 2003; 57:1100-16. [PMID: 14611040 DOI: 10.1366/00037020360695964] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Laser Raman spectroscopy has been used in this study to characterize mandibular bone samples from patients who had undergone radiation therapy for oral cancer. The paper discusses spectral changes resulting in osteoradionecrosis (ORN) of the mandibular bone, a serious complication that may occur after radiation therapy. Histopathological studies normally reveal the radiation damage on vascular canals and loss in bone cells, but will not reveal any structural or biochemical changes. All radiation-induced side effects are attributed to this hypovascularity and hypocellularity caused by early- and/or late-delayed effects. Our Raman studies on normal and ORN bone and on bone exposed to radiation, but not in the ORN state, show that irradiation produces immediate structural changes in the inorganic bone matrix with a slight loss in cells. ORN bone, in addition to the structural changes that had already occurred on radiation exposure, shows almost complete loss of cellular components. Since bone tissue is continuously being remodeled (dissolved and rebuilt) under normal conditions, our results suggest that the immediate structural changes in the calcium hydroxy apatite mineral part is not repaired in ORN, due to loss of the highly transient osteoblasts and osteoclasts resulting from destruction of stem cells. The spectral studies also show changes in the organic matrix, which is mostly type I collagen.
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Affiliation(s)
- R Jyothi Lakshmi
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, India, 576 119
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Jyothi Lakshmi R, Kartha VB, Murali Krishna C, R Solomon JG, Ullas G, Uma Devi P. Tissue Raman spectroscopy for the study of radiation damage: brain irradiation of mice. Radiat Res 2002. [PMID: 11835681 DOI: 10.1667/0033-7587(2002)157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Radiotherapy is routinely employed in the treatment of head and neck cancers. Acute cell death, radiation-activated chemical cascades, and the induction of genes coding for protective factors like cytokines are considered to be the major processes involved in radiation damage and repair. It should be possible to follow these processes by monitoring the biochemical interactions initiated by radiation. We have carried out Raman spectroscopy studies on tissue from mice subjected to brain irradiation to identify the biochemical changes occurring in tissue and brain as a result of radiation injury. These studies show that brain irradiation produces drastic spectral changes even in tissue far removed from the irradiation site. The changes are very similar to those produced by the stress of inoculation and restraint and the administration of an anesthetic drug. While the changes produced by stress or anesthetics last for only a short time (a few hours to 1 or 2 days), radiation-induced changes persist even after 1 week. The spectral changes can be interpreted in terms of the observation of new spectra that are dominated by bands due to proteins. The results thus support the hypothesis that various protective factors are released throughout the body when the central nervous system (CNS) is exposed to radiation.
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Affiliation(s)
- R Jyothi Lakshmi
- Department of Physics, Manipal Institute of Technology, Manipal-576 119, India
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34
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Abstract
Radiotherapy is routinely employed in the treatment of head and neck cancers. Acute cell death, radiation-activated chemical cascades, and the induction of genes coding for protective factors like cytokines are considered to be the major processes involved in radiation damage and repair. It should be possible to follow these processes by monitoring the biochemical interactions initiated by radiation. We have carried out Raman spectroscopy studies on tissue from mice subjected to brain irradiation to identify the biochemical changes occurring in tissue and brain as a result of radiation injury. These studies show that brain irradiation produces drastic spectral changes even in tissue far removed from the irradiation site. The changes are very similar to those produced by the stress of inoculation and restraint and the administration of an anesthetic drug. While the changes produced by stress or anesthetics last for only a short time (a few hours to 1 or 2 days), radiation-induced changes persist even after 1 week. The spectral changes can be interpreted in terms of the observation of new spectra that are dominated by bands due to proteins. The results thus support the hypothesis that various protective factors are released throughout the body when the central nervous system (CNS) is exposed to radiation.
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MESH Headings
- Anesthetics, Dissociative/administration & dosage
- Anesthetics, Dissociative/toxicity
- Animals
- Brain/pathology
- Brain/radiation effects
- Brain Chemistry/radiation effects
- Cytokines/metabolism
- Diazepam/administration & dosage
- Diazepam/toxicity
- Female
- Gene Expression Regulation/radiation effects
- Immobilization/adverse effects
- Injections, Intraperitoneal/adverse effects
- Ketamine/administration & dosage
- Ketamine/toxicity
- Lipids/analysis
- Male
- Membrane Lipids/analysis
- Membrane Proteins/analysis
- Mice
- Muscle Proteins/analysis
- Muscle, Skeletal/chemistry
- Muscle, Skeletal/pathology
- Nerve Tissue Proteins/analysis
- Neurotransmitter Agents/metabolism
- Organ Specificity
- Oxidative Stress
- Phospholipids/analysis
- Radiation Injuries, Experimental/metabolism
- Radiation Injuries, Experimental/pathology
- Radiotherapy/adverse effects
- Spectrum Analysis, Raman
- Stress, Physiological/etiology
- Stress, Physiological/genetics
- Stress, Physiological/metabolism
- Stress, Physiological/pathology
- Time Factors
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Affiliation(s)
- R Jyothi Lakshmi
- Department of Physics, Manipal Institute of Technology, Manipal-576 119, India
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Tripathi AK, Sahasrabudhe A, Mitra S, Mukhopadhyay R, Gupta NM, Kartha VB. QENS and FTIR studies on binding states of benzene molecules adsorbed in zeolite HZSM-5 at room temperature. Phys Chem Chem Phys 2001. [DOI: 10.1039/b102055m] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Shete BS, Kamble VS, Gupta NM, Kartha VB. Fourier Transform Infrared Study on the Encapsulation of CO in Zeolite Y under the Moderate Temperature and Pressure Conditions. J Phys Chem B 1998. [DOI: 10.1021/jp981178z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. S. Shete
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - V. S. Kamble
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - N. M. Gupta
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
| | - V. B. Kartha
- Centre for Laser Spectroscopy, Manipal Academy of Higher Education, Manipal 576 119, India
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37
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Kamble VS, Gupta NM, Kartha VB, Iyer RM. Fourier-transform infrared study on the encapsulation of carbon monoxide in cation-exchanged X-zeolites. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/ft9938901143] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Bhowmick GK, Jagatap BN, Ahmad SA, Kartha VB. Absorption behavior of neutral uranium atoms in a pulsed hollow cathode discharge. Appl Opt 1991; 30:1893-1898. [PMID: 20700156 DOI: 10.1364/ao.30.001893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The temporal behavior of uranium neutrals in the postdischarge conditions in a pulsed hollow cathode discharge has been investigated by monitoring the time dependent absorption of the output radiation of a single-axial-mode dye laser by uranium atoms. Studies of the kinetics of the absorption suggest that electron ion recombination followed by deactivation, Penning ionization, and diffusion to the cathode wall are the dominant mechanisms in the postdischarge conditions.
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40
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Rajgopal SU, Kartha VB, Prasad GE, Mathur SK. Trace elements in biliary calculi. Indian J Gastroenterol 1988; 7:15-7. [PMID: 3338822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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41
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Rajagopal U, Mathur SK, Kartha VB, Prasad GE. Pigment calculi--structure and composition. Indian J Gastroenterol 1988; 7:9-11. [PMID: 3338835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Abstract
Lithium, sodium, potassium, cesium, and ammonium palmityl sulfates were prepared by sulfonation of n-hexadecanol, followed by treatment with the corresponding alkali carbonates; selectively deuterated palmityl sulfates were also synthesized to aid the assignment of certain vibrational modes. The infrared and Raman spectra of the polycrystalline solids were interpreted and discussed in terms of acyl chain and head group vibrations. Spectral evidence is presented for the existence of different solid polymorphic forms.
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Abstract
The infrared and Raman spectra of cyclopentanone, ααα′α′-d4-cyclopentanone, βββ′β′-d4-cyclopentanone and d8-cyclopentanone have been measured and a normal co-ordinate analysis performed based on a twisted C2 conformation. The 36 normal vibrations were computed using a selective valence force field comprising 16 diagonal and 16 off-diagonal force constants. The 4 isotopic species provided 144 frequencies to refine 15 diagonal force constants. The initial values of the constants were transferred from a force field for cyclohexanone computed in this laboratory. The infrared and Raman spectra were analyzed in terms of the potential energy distribution coefficients categorized as group frequencies, zone frequencies, and delocalized frequencies.
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Fuhrer H, Kartha VB, Krueger PJ, Mantsch HH, Jones RN. Normal modes and group frequencies. Conflict or compromise? In-depth vibrational analysis of cyclohexanone. Chem Rev 1972. [DOI: 10.1021/cr60279a001] [Citation(s) in RCA: 104] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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