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Redox state changes of mitochondrial cytochromes in brain and breast cancers by Raman spectroscopy and imaging. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132134] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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2
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Kozik A, Pavlova M, Petrov I, Bychkov V, Kim L, Dorozhko E, Cheng C, Rodriguez RD, Sheremet E. A review of surface-enhanced Raman spectroscopy in pathological processes. Anal Chim Acta 2021; 1187:338978. [PMID: 34753586 DOI: 10.1016/j.aca.2021.338978] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 12/17/2022]
Abstract
With the continuous growth of the human population and new challenges in the quality of life, it is more important than ever to diagnose diseases and pathologies with high accuracy, sensitivity and in different scenarios from medical implants to the operation room. Although conventional methods of diagnosis revolutionized healthcare, alternative analytical methods are making their way out of academic labs into clinics. In this regard, surface-enhanced Raman spectroscopy (SERS) developed immensely with its capability to achieve single-molecule sensitivity and high-specificity in the last two decades, and now it is well on its way to join the arsenal of physicians. This review discusses how SERS is becoming an essential tool for the clinical investigation of pathologies including inflammation, infections, necrosis/apoptosis, hypoxia, and tumors. We critically discuss the strategies reported so far in nanoparticle assembly, functionalization, non-metallic substrates, colloidal solutions and how these techniques improve SERS characteristics during pathology diagnoses like sensitivity, selectivity, and detection limit. Moreover, it is crucial to introduce the most recent developments and future perspectives of SERS as a biomedical analytical method. We finally discuss the challenges that remain as bottlenecks for a routine SERS implementation in the medical room from in vitro to in vivo applications. The review showcases the adaptability and versatility of SERS to resolve pathological processes by covering various experimental and analytical methods and the specific spectral features and analysis results achieved by these methods.
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Affiliation(s)
- Alexey Kozik
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia; Siberian Medical State University, Moskovskiy Trakt, 2, Tomsk, 634050, Russia
| | - Marina Pavlova
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia; Siberian Medical State University, Moskovskiy Trakt, 2, Tomsk, 634050, Russia
| | - Ilia Petrov
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia
| | - Vyacheslav Bychkov
- Tomsk National Research Medical Center of the Russian Academy of Sciences, Cancer Research Institute, 5 Kooperativny Street, Tomsk, 634009, Russia
| | - Larissa Kim
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia
| | - Elena Dorozhko
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia
| | - Chong Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Raul D Rodriguez
- Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, 634050, Russia.
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Redox Imbalance and Biochemical Changes in Cancer by Probing Redox-Sensitive Mitochondrial Cytochromes in Label-Free Visible Resonance Raman Imaging. Cancers (Basel) 2021; 13:cancers13050960. [PMID: 33668874 PMCID: PMC7956250 DOI: 10.3390/cancers13050960] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/18/2021] [Accepted: 02/21/2021] [Indexed: 12/21/2022] Open
Abstract
Simple Summary Gliomas comprise around 30% of human brain tumors, while invasive ductal carcinoma (IDC) comprises around 80% of human breast cancers. The aim of our study was to show that cancerogenesis affects the redox status of mitochondrial cytochromes, which can be tracked by using Raman spectroscopy and imaging. Our results confirmed that human breast cancer and brain tumor demonstrate a redox imbalance compared to normal tissues. We have shown the correlation between the intensity of cytochromes Raman bands at 750, 1126, 1337 and 1584 cm−1 and malignancy grade for brain and breast cancers. Abstract To monitor redox state changes and biological mechanisms occurring in mitochondrial cytochromes in cancers improving methods are required. We used Raman spectroscopy and Raman imaging to monitor changes in the redox state of the mitochondrial cytochromes in ex vivo human brain and breast tissues at 532 nm, 633 nm, 785 nm. We identified the oncogenic processes that characterize human infiltrating ductal carcinoma (IDC) and human brain tumors: gliomas; astrocytoma and medulloblastoma based on the quantification of cytochrome redox status by exploiting the resonance-enhancement effect of Raman scattering. We visualized localization of cytochromes by Raman imaging in the breast and brain tissues and analyzed cytochrome c vibrations at 750, 1126, 1337 and 1584 cm−1 as a function of malignancy grade. We found that the concentration of reduced cytochrome c becomes abnormally high in human brain tumors and breast cancers and correlates with the grade of cancer. We showed that Raman imaging provides additional insight into the biology of astrocytomas and breast ductal invasive cancer, which can be used for noninvasive grading, differential diagnosis.
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Xu C, Zou H, Zhao Z, Zheng Z, Kwok RTK, Lam JWY, Sung HHY, Williams ID, Chen S, Zheng L, Tang BZ. Turning on Light Emission of a Dark Pro‐Aggregation‐Induced Emission Luminogen in Aqueous Media Through Reductase‐Modulated Derotation. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202000080] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Changhuo Xu
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Hang Zou
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
- Department of Laboratory Medicine Nanfang Hospital Southern Medical University Guangzhou 510515 China
| | - Zheng Zhao
- School of Chemistry and Chemical Engineering Southeast University Nanjing China
| | - Zheng Zheng
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Ryan T. K. Kwok
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Jacky W. Y. Lam
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Herman H. Y. Sung
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Ian D Williams
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
| | - Sijie Chen
- Ming Wai Lau Centre for Reparative Medicine Karolinska Institutet Sha Tin Hong Kong China
| | - Lei Zheng
- Department of Laboratory Medicine Nanfang Hospital Southern Medical University Guangzhou 510515 China
| | - Ben Zhong Tang
- Department of Chemistry The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Department of Chemical and Biomedical Engineering, Institute for Advanced Study The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China
- Center for Aggregation-Induced Emission SCUT-HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China
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Ko YK, Yabushita A, Kobayashi T. Primary Electronic and Vibrational Dynamics of Cytochrome c Observed by Sub-10 fs NUV Laser Pulses. J Phys Chem B 2020; 124:8249-8258. [PMID: 32852960 DOI: 10.1021/acs.jpcb.0c05959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The primary reaction mechanism of cytochrome c (Cyt c) was elucidated for two redox forms of ferric (oxidized) and ferrous (reduced) Cyt c by measuring their transient absorption (TA) spectra using a homemade sub-10 fs broadband NUV laser pulses system. The TA traces measured in the broad probe wavelength region were analyzed by the global analysis method to study the electronic dynamics. The difference of relaxation dynamics dependent on the excitation bandwidth enabled us to elucidate that the 2.5 ps component in ferrous Cyt c can be assigned to intramolecular vibration energy redistribution and not to vibrational cooling, which was not clear until this work. The temporal resolution of 10 fs observes TA signal modulation caused by the molecular vibration in the time domain, which can be used to calculate the instantaneous frequency of the molecular vibration mode. The observed vibrational dynamics has visualized that the heme structure changes in 0.8 ps for ferric Cyt c and in >1.0 ps for ferrous Cyt c. These estimated lifetimes of vibrational dynamics reflect vibrational relaxation in the ground state of ferric Cyt c and electronic transition from the S2 state to the S1 state in ferrous Cyt c, respectively.
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Affiliation(s)
- Ying Kuan Ko
- Department of Electrophysics, National Chiao-Tung University, Hsinchu 300, Taiwan, R.O.C
| | - Atsushi Yabushita
- Department of Electrophysics, National Chiao-Tung University, Hsinchu 300, Taiwan, R.O.C
| | - Takayoshi Kobayashi
- Department of Electrophysics, National Chiao-Tung University, Hsinchu 300, Taiwan, R.O.C
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Zhao RZ, Jiang S, Ru NY, Jiao B, Yu ZB. Comparison of hypoxic effects induced by chemical and physical hypoxia on cardiomyocytes. Can J Physiol Pharmacol 2019; 97:980-988. [PMID: 31136722 DOI: 10.1139/cjpp-2019-0092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The degree and duration of chemical hypoxia induced by sodium dithionite (Na2S2O4) have not been reported. It is not yet clear how much reduction in the O2 concentration (physical hypoxia) can lead to hypoxia in cultured cardiomyocytes. In this study, oxygen microelectrodes were used to measure changes in the O2 concentration in media containing different concentrations of Na2S2O4. Then, hypoxic effects of 0.8, 1.0, and 2.0 mM Na2S2O4 or 1%, 3%, and 5% O2 in cultured cardiomyocytes from neonatal rats were observed and compared. The results showed that the O2 concentration failed to remain constant by Na2S2O4 treatment during the 180-minute observation period. Only the 2.0 mM Na2S2O4 group significantly increased the expression of hypoxia-inducible factor 1α (HIF-1α) and hypoxic responses. Notably, 3% O2 only significantly increased the expression of HIF-1α in cardiomyocytes, while 1% O2 not only increased the expression of HIF-1α but also increased the apoptotic rate in cardiomyocytes. These results suggest that Na2S2O4 is not suitable for establishing a hypoxic model in cultured neonatal rat cardiomyocytes, and neonatal rat cardiomyocytes cultured at or below 1% O2 induced significant hypoxic effects, which can be used as a starting O2 concentration for establishing a hypoxic cell model.
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Affiliation(s)
- Ru-Zhou Zhao
- Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China
| | - Shuai Jiang
- Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China
| | - Ning-Yu Ru
- Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China.,Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China
| | - Bo Jiao
- Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China.,Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China
| | - Zhi-Bin Yu
- Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China.,Department of Aerospace Physiology, Fourth Military Medical University, Key Laboratory of Aerospace Medicine, Ministry of China, Xi'an 710032, China
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Yang GZ, Xue FS, Liu YY, Li HX, Liu Q, Liao X. Feasibility Analysis of Oxygen-Glucose Deprivation-Nutrition Resumption on H9c2 Cells In vitro Models of Myocardial Ischemia-Reperfusion Injury. Chin Med J (Engl) 2018; 131:2277-2286. [PMID: 30246713 PMCID: PMC6166467 DOI: 10.4103/0366-6999.241809] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Background: Oxygen-glucose deprivation-nutrition resumption (OGD-NR) models on H9c2 cells are commonly used in vitro models of simulated myocardial ischemia-reperfusion injury (MIRI), but no study has assessed whether these methods for establishing in vitro models can effectively imitate the characteristics of MIRI in vivo. This experiment was designed to analyze the feasibility of six OGD-NR models of MIRI. Methods: By searching the PubMed database using the keywords “myocardial reperfusion injury H9c2 cells,” we obtained six commonly used OGD-NR in vitro models of MIRI performed on H9c2 cells from more than 400 published papers before January 30, 2017. For each model, control (C), simulated ischemia (SI), and simulated ischemia-reperfusion (SIR) groups were assigned, and cell morphology, lactate dehydrogenase (LDH) release, adenosine triphosphate (ATP) levels, reactive oxygen species (ROS), mitochondrial membrane potential (MMP), and inflammatory cytokines were examined to evaluate the characteristics of cell injury. Subsequently, a coculture system of cardiomyocyte-endothelial-macrophage was constructed. The coculture system was dealt with SI and SIR treatments to test the effect on cardiomyocytes survival. Results: For models 1, 2, 3, 4, 5, and 6, SI treatment caused morphological damage to cells, and subsequent SIR treatment did not cause further morphological damage. In the models 1, 2, 3, 4, 5 and 6, LDH release was significantly higher in the SI groups than that in the C group (P < 0.05), and was significantly lower in the SIR groups than that in the SI groups (P < 0.05), except for no significant differences in the LDH release between C, SI and SIR groups in model 6 receiving a 3-h SI treatment. In models 1, 2, 3, 4, 5, and 6, compared with the C group, ATP levels of the SI groups significantly decreased (P < 0.05), ROS levels increased (P < 0.05), and MMP levels decreased (P < 0.05). Compared with the SI group, ATP level of the SIR groups was significantly increased (P < 0.05), and there was no significant ROS production, MMP collapse, and over inflammatory response in the SIR groups. In a coculture system of H9c2 cells-endothelial cells-macrophages, the proportion of viable H9c2 cells in the SIR groups was not reduced compared with the SI groups. Conclusion: All the six OGD-NR models on H9c2 cells in this experiment can not imitate the characteristics of MIRI in vivo and are not suitable for MIRI-related study.
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Affiliation(s)
- Gui-Zhen Yang
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Fu-Shan Xue
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Ya-Yang Liu
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Hui-Xian Li
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Qing Liu
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
| | - Xu Liao
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, China
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Chaichi A, Prasad A, Gartia MR. Raman Spectroscopy and Microscopy Applications in Cardiovascular Diseases: From Molecules to Organs. BIOSENSORS 2018; 8:E107. [PMID: 30424523 PMCID: PMC6315865 DOI: 10.3390/bios8040107] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 11/07/2018] [Accepted: 11/07/2018] [Indexed: 01/03/2023]
Abstract
Noninvasive and label-free vibrational spectroscopy and microscopy methods have shown great potential for clinical diagnosis applications. Raman spectroscopy is based on inelastic light scattering due to rotational and vibrational modes of molecular bonds. It has been shown that Raman spectra provide chemical signatures of changes in biological tissues in different diseases, and this technique can be employed in label-free monitoring and clinical diagnosis of several diseases, including cardiovascular studies. However, there are very few literature reviews available to summarize the state of art and future applications of Raman spectroscopy in cardiovascular diseases, particularly cardiac hypertrophy. In addition to conventional clinical approaches such as electrocardiography (ECG), echocardiogram (cardiac ultrasound), positron emission tomography (PET), cardiac computed tomography (CT), and single photon emission computed tomography (SPECT), applications of vibrational spectroscopy and microscopy will provide invaluable information useful for the prevention, diagnosis, and treatment of cardiovascular diseases. Various in vivo and ex vivo investigations can potentially be performed using Raman imaging to study and distinguish pathological and physiological cardiac hypertrophies and understand the mechanisms of other cardiac diseases. Here, we have reviewed the recent literature on Raman spectroscopy to study cardiovascular diseases covering investigations on the molecular, cellular, tissue, and organ level.
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Affiliation(s)
- Ardalan Chaichi
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Alisha Prasad
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Manas Ranjan Gartia
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
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Development of a Gas-Tight Microfluidic System for Raman Sensing of Single Pulmonary Arterial Smooth Muscle Cells Under Normoxic/Hypoxic Conditions. SENSORS 2018; 18:s18103238. [PMID: 30261634 PMCID: PMC6210661 DOI: 10.3390/s18103238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 09/20/2018] [Accepted: 09/24/2018] [Indexed: 01/22/2023]
Abstract
Acute hypoxia changes the redox-state of pulmonary arterial smooth muscle cells (PASMCs). This might influence the activity of redox-sensitive voltage-gated K+-channels (Kv-channels) whose inhibition initiates hypoxic pulmonary vasoconstriction (HPV). However, the molecular mechanism of how hypoxia—or the subsequent change in the cellular redox-state—inhibits Kv-channels remains elusive. For this purpose, a new multifunctional gas-tight microfluidic system was developed enabling simultaneous single-cell Raman spectroscopic studies (to sense the redox-state under normoxic/hypoxic conditions) and patch-clamp experiments (to study the Kv-channel activity). The performance of the system was tested by optically recording the O2-content and taking Raman spectra on murine PASMCs under normoxic/hypoxic conditions or in the presence of H2O2. Oxygen sensing showed that hypoxic levels in the gas-tight microfluidic system were achieved faster, more stable and significantly lower compared to a conventional open system (1.6 ± 0.2%, respectively 6.7 ± 0.7%, n = 6, p < 0.001). Raman spectra revealed that the redistribution of biomarkers (cytochromes, FeS, myoglobin and NADH) under hypoxic/normoxic conditions were improved in the gas-tight microfluidic system (p-values from 0.00% to 16.30%) compared to the open system (p-value from 0.01% to 98.42%). In conclusion, the new redox sensor holds promise for future experiments that may elucidate the role of Kv-channels during HPV.
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Zardi P, Gallo E, Solan GA, Hudson AJ. Resonance Raman spectroscopy as an in situ probe for monitoring catalytic events in a Ru-porphyrin mediated amination reaction. Analyst 2016; 141:3050-8. [PMID: 27070335 DOI: 10.1039/c6an00333h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Resonance Raman microspectroscopy has been widely used to study the structure and dynamics of porphyrins and metal complexes containing the porphyrin ligand. Here, we have demonstrated that the same technique can be adapted to examine the mechanism of a homogeneously-catalysed reaction mediated by a transition-metal-porphyrin complex. Previously it has been challenging to study this type of reaction using in situ spectroscopic monitoring due to the low stability of the reaction intermediates and elevated-temperature conditions. We have made a straightforward modification to the sample stage on a microscope for time-lapsed Raman microspectroscopy from reaction mixtures in these media. The allylic amination of unsaturated hydrocarbons by aryl azides, which can be catalysed by a ruthenium-porphyrin complex, has been used as an illustrative example of the methodology. The mechanism of this particular reaction has been studied previously using density-functional theory and kinetic approaches. The Raman measurements support the mechanism proposed in the earlier publications by providing the first experimental verification of a precursor reaction complex between the aryl azide and the ruthenium metal ion, and evidence for the formation of a mono-imido intermediate complex under conditions of high concentration of the reactant olefin.
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Affiliation(s)
- Paolo Zardi
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Emma Gallo
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Gregory A Solan
- Department of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
| | - Andrew J Hudson
- Department of Chemistry, University of Leicester, Leicester, LE1 7RH, UK.
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Almohammedi A, Kapetanaki SM, Hudson AJ, Storey NM. Monitoring Changes in the Redox State of Myoglobin in Cardiomyocytes by Raman Spectroscopy Enables the Protective Effect of NO Donors to Be Evaluated. Anal Chem 2015; 87:10605-12. [PMID: 26407187 DOI: 10.1021/acs.analchem.5b03103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Raman microspectroscopy has been used to monitor changes in the redox and ligand-coordination states of the heme complex in myoglobin during the preconditioning of ex vivo cardiomyocytes with pharmacological drugs that release nitric oxide (NO). These chemical agents are known to confer protection on heart tissue against ischemia-reperfusion injury. Subsequent changes in the redox and ligand-coordination states during experimental simulations of ischemia and reperfusion have also been monitored. We found that these measurements, in real time, could be used to evaluate the preconditioning treatment of cardiomyocytes and to predict the likelihood of cell survival following a potentially lethal period of ischemia. Evaluation of the preconditioning treatment was done at the single-cell level. The binding of NO to myoglobin, giving a 6-coordinate ferrous-heme complex, was inferred from the measured Raman bands of a cardiomyocyte by comparison to pure solution of the protein in the presence of NO. A key change in the Raman spectrum was observed after perfusion of the NO-donor was completed, where, if the preconditioning treatment was successful, the bands corresponding to the nitrosyl complex were replaced by bands corresponding to metmyoglobin, Mb(III). An observation of Mb(III) bands in the Raman spectrum was made for all of the cardiomyocytes that recovered contractile function, whereas the absence of Mb(III) bands always indicated that the cardiomyocyte would be unable to recover contractile function following the simulated conditions of ischemia and reperfusion in these experiments.
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Affiliation(s)
| | | | | | - Nina M Storey
- Department of Cell Physiology and Pharmacology, University of Leicester , Leicester, LE1 9HN, United Kingdom
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