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Zhao L, Liu S, Liu Y, Tang H. Vasomotion heterogeneity and spectral characteristics in diabetic and hypertensive patients. Microvasc Res 2024; 151:104620. [PMID: 37923118 DOI: 10.1016/j.mvr.2023.104620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/13/2023] [Accepted: 10/28/2023] [Indexed: 11/07/2023]
Abstract
Vasomotion refers to the spontaneous oscillation of blood vessels within a frequency range of 0.01 to 1.6 Hz. Various disease states, including hypertension and diabetes, have been associated with alterations in vasomotion at the finger, indicating potential impairment of skin microcirculation. Due to the non-linear nature of human vasculature, the modification of vasomotion may vary across different locations for different diseases. In this study, Laser Doppler Flowmetry was used to measure blood flow motion at acupoints LU8, LU5, SP6, and PC3 among 49 participants with or without diabetes and/or hypertension. Fast Fourier Transformation was used to analyze noise type while Hilbert-Huang Transformation and wavelet analysis were applied to assess Signal Noise Ratio (SNR) results. Statistical analysis revealed that different acupoints exhibit distinct spectral characteristics of vasomotion not only among healthy individuals but also among patients with diabetes and/or hypertension. The results showed strong heterogeneity of vasomotion among blood vessels, indicating that the vasomotion measured at a certain point may not reflect the real status of microcirculation.
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Affiliation(s)
- Liangjing Zhao
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Shuhong Liu
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Yang Liu
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Hui Tang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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2
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Sarimov RM, Serov DA, Gudkov SV. Biological Effects of Magnetic Storms and ELF Magnetic Fields. BIOLOGY 2023; 12:1506. [PMID: 38132332 PMCID: PMC10740910 DOI: 10.3390/biology12121506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/01/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
Magnetic fields are a constant and essential part of our environment. The main components of ambient magnetic fields are the constant part of the geomagnetic field, its fluctuations caused by magnetic storms, and man-made magnetic fields. These fields refer to extremely-low-frequency (<1 kHz) magnetic fields (ELF-MFs). Since the 1980s, a huge amount of data has been accumulated on the biological effects of magnetic fields, in particular ELF-MFs. However, a unified picture of the patterns of action of magnetic fields has not been formed. Even though a unified mechanism has not yet been generally accepted, several theories have been proposed. In this review, we attempted to take a new approach to analyzing the quantitative data on the effects of ELF-MFs to identify new potential areas for research. This review provides general descriptions of the main effects of magnetic storms and anthropogenic fields on living organisms (molecular-cellular level and whole organism) and a brief description of the main mechanisms of magnetic field effects on living organisms. This review may be of interest to specialists in the fields of biology, physics, medicine, and other interdisciplinary areas.
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Affiliation(s)
| | | | - Sergey V. Gudkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilova Street, 119991 Moscow, Russia; (R.M.S.); (D.A.S.)
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Zherebtsov EA, Zharkikh EV, Loktionova YI, Zherebtsova AI, Sidorov VV, Rafailov EU, Dunaev AV. Wireless Dynamic Light Scattering Sensors Detect Microvascular Changes Associated With Ageing and Diabetes. IEEE Trans Biomed Eng 2023; 70:3073-3081. [PMID: 37171930 DOI: 10.1109/tbme.2023.3275654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This article presents clinical results of wireless portable dynamic light scattering sensors that implement laser Doppler flowmetry signal processing. It has been verified that the technology can detect microvascular changes associated with diabetes and ageing in volunteers. Studies were conducted primarily on wrist skin. Wavelet continuous spectrum calculation was used to analyse the obtained time series of blood perfusion recordings with respect to the main physiological frequency ranges of vasomotions. In patients with type 2 diabetes, the area under the continuous wavelet spectrum in the endothelial, neurogenic, myogenic, and cardio frequency ranges showed significant diagnostic value for the identification of microvascular changes. Aside from spectral analysis, autocorrelation parameters were also calculated for microcirculatory blood flow oscillations. The groups of elderly volunteers and patients with type 2 diabetes, in comparison with the control group of younger healthy volunteers, showed a statistically significant decrease of the normalised autocorrelation function in time scales up to 10 s. A set of identified parameters was used to test machine learning algorithms to classify the studied groups of young controls, elderly controls, and diabetic patients. Our conclusion describes and discusses the classification metrics that were found to be most effective.
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Kralj L, Lenasi H. Wavelet analysis of laser Doppler microcirculatory signals: Current applications and limitations. Front Physiol 2023; 13:1076445. [PMID: 36741808 PMCID: PMC9895103 DOI: 10.3389/fphys.2022.1076445] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/28/2022] [Indexed: 01/21/2023] Open
Abstract
Laser Doppler flowmetry (LDF) has long been considered a gold standard for non-invasive assessment of skin microvascular function. Due to the laser Doppler (LD) microcirculatory signal's complex biological and physiological context, using spectral analysis is advisable to extract as many of the signal's properties as feasible. Spectral analysis can be performed using either a classical Fourier transform (FT) technique, which has the disadvantage of not being able to localize a signal in time, or wavelet analysis (WA), which provides both the time and frequency localization of the inspected signal. So far, WA of LD microcirculatory signals has revealed five characteristic frequency intervals, ranging from 0.005 to 2 Hz, each of which being related to a specific physiological influence modulating skin microcirculatory response, providing for a more thorough analysis of the signals measured in healthy and diseased individuals. Even though WA is a valuable tool for analyzing and evaluating LDF-measured microcirculatory signals, limitations remain, resulting in a lack of analytical standardization. As a more accurate assessment of human skin microcirculation may better enhance the prognosis of diseases marked by microvascular dysfunction, searching for improvements to the WA method is crucial from the clinical point of view. Accordingly, we have summarized and discussed WA application and its limitations when evaluating LD microcirculatory signals, and presented insight into possible future improvements. We adopted a novel strategy when presenting the findings of recent studies using WA by focusing on frequency intervals to contrast the findings of the various studies undertaken thus far and highlight their disparities.
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Affiliation(s)
- Lana Kralj
- Institute of Physiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Helena Lenasi
- Institute of Physiology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia,*Correspondence: Helena Lenasi,
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Tikhonova IV, Tankanag AV, Guseva IE, Grinevich AA. Analysis of interactions between cardiovascular oscillations for discrimination of early vascular disorders in arterial hypertension and type 2 diabetes. Biomed Signal Process Control 2023. [DOI: 10.1016/j.bspc.2022.104222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Serov D, Tankanag A, Astashev M. Low-frequency oscillations of murine skin microcirculations and periodic changes of [Ca 2+ ] i and [NO] i levels in murine endotheliocytes: An effect of provocative tests. Cell Biol Int 2021; 46:427-442. [PMID: 34882893 DOI: 10.1002/cbin.11743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 11/07/2021] [Accepted: 12/04/2021] [Indexed: 01/14/2023]
Abstract
The five frequency intervals of skin blood oscillation were described: cardiac, respiratory, myogenic, neurogenic, and endothelial. The endothelial interval is derived into NO-independent and NO-dependent. The exact molecular, cell, or systemic mechanisms of endothelial oscillations generation are unclear. We proposed that oscillations of Ca2+ and NO in endotheliocytes may be possible sources of skin blood perfusion (SBP) oscillations in endothelial interval. To examine our hypothesis we compared the oscillations of cytoplasmic Ca2+ and NO ([Ca2+ ]i and [NO]i ) concentration in cultured murine microvascular endotheliocytes and SBP oscillations in mice. Local heating test and model hypoxia were used as tools to evaluate an interconnection of studied parameters. [Ca2+ ]i and [NO]i were measured simultaneously by Fura-2 AM and DAF-FM. The SBP was measured by laser Doppler flowmetry. The [Ca2+ ]i and [NO]i oscillations at 0.005-0.01 Hz were observed in endotheliocytes, that coincides the ranges of NO-independent endothelial interval. Heating decreased amplitude of [Ca2+ ]i and [NO]i oscillations in cells in NO-independent endothelial interval, while amplitudes of SBP oscillations increased in NO-independent and NO-dependent intervals. Hypoxia reduced the [NO]i oscillations amplitude. Heating test during hypoxia increased NO-independent endothelial SBP oscillations and decreased myogenic ones, did not effect on [NO]i oscillations, and shifted [Ca2+ ]i oscillations peak from 0.005-0.01 Hz to 0.01-0.018 Hz. We observed the [Ca2+ ]i and [NO]i oscillations synchronization within a cell and between cells for the first time. Heating abolished these synchronizations. Therefore low-frequency [Ca2+ ]i and [NO]i oscillations in endotheliocytes may be considered as modulators of low-frequency endothelial SBP oscillations.
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Affiliation(s)
- Dmitriy Serov
- Institute of Cell Biophisics, Russian Academy of Sciences, Laboratory of Cellular Neurobiology, Pushchino, Moscow region, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Biophotonics Center, Moscow, Russia
| | - Arina Tankanag
- Institute of Cell Biophisics, Russian Academy of Sciences, Laboratory of Cellular Neurobiology, Pushchino, Moscow region, Russia
| | - Maksim Astashev
- Institute of Cell Biophisics, Russian Academy of Sciences, Laboratory of Cellular Neurobiology, Pushchino, Moscow region, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Biophotonics Center, Moscow, Russia
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Saha M, Dremin V, Rafailov I, Dunaev A, Sokolovski S, Rafailov E. Wearable Laser Doppler Flowmetry Sensor: A Feasibility Study with Smoker and Non-Smoker Volunteers. BIOSENSORS-BASEL 2020; 10:bios10120201. [PMID: 33297337 PMCID: PMC7762214 DOI: 10.3390/bios10120201] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/01/2020] [Accepted: 12/03/2020] [Indexed: 12/14/2022]
Abstract
Novel, non-invasive wearable laser Doppler flowmetry (LDF) devices measure real-time blood circulation of the left middle fingertip and the topside of the wrist of the left hand. The LDF signals are simultaneously recorded for fingertip and wrist. The amplitude of blood flow signals and wavelet analysis of the signal are used for the analysis of blood perfusion parameters. The aim of this pilot study is to validate the accuracy of blood circulation measurements recorded by one such non-invasive wearable LDF device for healthy young non-smokers and smokers. This study reveals a higher level of blood perfusion in the non-smoker group compared to the smoker group and vice-versa for the variation of pulse frequency. This result can be useful to assess the sensitivity of the wearable LDF sensor in determining the effect of nicotine for smokers as compared to non-smokers and also the blood microcirculation in smokers with different pathologies.
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Affiliation(s)
- Mou Saha
- Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK; (S.S.); (E.R.)
- Correspondence: (M.S.); (V.D.)
| | - Viktor Dremin
- Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK; (S.S.); (E.R.)
- Research & Development Center of Biomedical Photonics, Orel State University, 302026 Orel, Russia;
- Correspondence: (M.S.); (V.D.)
| | - Ilya Rafailov
- Aston Medical Technology Ltd., Birmingham B7 4BB, UK;
| | - Andrey Dunaev
- Research & Development Center of Biomedical Photonics, Orel State University, 302026 Orel, Russia;
| | - Sergei Sokolovski
- Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK; (S.S.); (E.R.)
| | - Edik Rafailov
- Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK; (S.S.); (E.R.)
- Saratov State University, 410012 Saratov, Russia
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Tikhonova IV, Grinevich AA, Guseva IE, Tankanag AV. Effect of orthostasis on the regulation of skin blood flow in upper and lower extremities in human. Microcirculation 2020; 28:e12655. [PMID: 32860464 DOI: 10.1111/micc.12655] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/08/2020] [Accepted: 08/13/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The research is aimed to investigate interactions between cardiovascular signals and to assess contributions of central and local mechanisms to skin blood flow regulation in upper and lower extremities at rest and under orthostasis. METHODS Heart rate variability, respiration, forearm, and foot skin blood flow were assessed at rest and during postural test in 25 healthy volunteers. Spectral analysis was performed. Phase synchronization degree of analyzed signals was determined by group phase wavelet coherence function. RESULTS Skin blood flow was lower on foot at rest and during postural test than on forearm. High-frequency component of heart rate variability was higher at ~0.3 Hz during postural test versus rest. Blood flow oscillation amplitudes on the foot were lower in frequency range including respiratory interval at rest than on forearm. Postural exposure increased amplitude of foot blood flow oscillations in respiratory interval and decreased amplitudes in cardiac interval versus rest. Orthostasis increased group wavelet phase coherence between foot blood flow and heart rate variability or respiration, as well as between forearm and foot blood flow at 0.3 Hz corresponding to respiration. CONCLUSIONS The contribution of central mechanisms associated with respiration to blood flow regulation increased in lower extremities during orthostasis.
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Affiliation(s)
- Irina V Tikhonova
- Institute of Cell Biophysics of Russian Academy of Sciences, Pushchino, Russia
| | - Andrey A Grinevich
- Institute of Cell Biophysics of Russian Academy of Sciences, Pushchino, Russia
| | - Irina E Guseva
- Hospital of Pushchino Scientific Centre of Russian Academy of Sciences, Pushchino, Russia
| | - Arina V Tankanag
- Institute of Cell Biophysics of Russian Academy of Sciences, Pushchino, Russia
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A new approach to the analysis of skin blood flow oscillations in human. Microvasc Res 2019; 126:103889. [PMID: 31255697 DOI: 10.1016/j.mvr.2019.103889] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/21/2019] [Accepted: 06/26/2019] [Indexed: 12/27/2022]
Abstract
It is considered that there are six non-overlapping frequency intervals with constant boundaries. These intervals correspond to different mechanisms of skin blood flow regulation. The boundaries do not depend on functional conditions but this statement should be verified. Also it remains unclear how the oscillatory components of skin blood flow are related. Thus the study is aimed to verify statistically the boundaries of frequency intervals, to test the hypothesis that the boundaries depend on age and to search for relationships between spectral components of skin blood flow. The study involved 105 healthy volunteers aged from 20 to 65 years, which were divided into two age groups. Skin blood flow was registered with laser Doppler flowmeter (LDF). Assessments of frequency interval boundaries and relationship between the frequency oscillatory components of blood flow were conducted with histogram approach, bootstrap method and correlation analysis. New frequency interval boundaries were found. They were different in two groups. A linear correlation and frequency areas with moderate (0.5-0.7) and high (>0.7) correlation coefficients were found between spectral components of blood flow. The dependence of these correlations on the age was shown. Thus we proposed a conceptually new approach to analysis of spectral components of skin microhemodynamics and interpretation of results obtained by laser Doppler techniques. This approach is the result of the development of modern understanding of relationships between skin blood flow regulation mechanisms and spectral components of LDF signals. It allows one to have a new look at these relationships as well as demonstrates their dependence on the functional state of the organism as a whole.
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Grinevich AA, Tankanag AV, Chemeris NK. The Impact of Stochastic Perturbations upon the Hydrodynamic Relationship between the Activity of Human Cardiac Ventricles and Low-Frequency Blood Flow Oscillations in the Microcirculatory Bed. Biophysics (Nagoya-shi) 2019. [DOI: 10.1134/s000635091901007x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Martini R, Bagno A. The wavelet analysis for the assessment of microvascular function with the laser Doppler fluxmetry over the last 20 years. Looking for hidden informations. Clin Hemorheol Microcirc 2018; 70:213-229. [DOI: 10.3233/ch-189903] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Romeo Martini
- Department of Cardio-Thorax and Vascular Sciences, Unit of Angiology, Azienda Ospedaliera Universitaria di Padova, Italy
| | - Andrea Bagno
- Department of Industrial Engineering, Università di Padova, Italy
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12
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Astashev ME, Serov DA, Tankanag AV. Anesthesia effects on the low frequency blood flow oscillations in mouse skin. Skin Res Technol 2018; 25:40-46. [PMID: 29790611 DOI: 10.1111/srt.12593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND When laboratory animals are used one needs to anesthetize them before recording. However, the influence of anesthesia on animal blood flow oscillations has not been studied. The effects of two ways of anesthesia, zoletil-xylazine, and zoletil-nitrous oxide mixtures, on mouse skin perfusion using laser Doppler flowmetry (LDF) technique were studied. METHODS BALB/c mice were used. LDF probe was placed on the ventral surface of the left hind paw. Spectral analysis of LDF signals was performed with continuous adaptive wavelet transform to identify and describe peripheral blood flow oscillations in mouse skin. RESULTS Low-frequency oscillation interval boundaries (myogenic, neurogenic, and endothelial) for mice were shown to coincide with the boundaries determined for human and rats, that demonstrate their independence from the body size. Zoletil-xylazine anesthesia significantly decreased neurogenic and endothelial oscillation amplitudes by 29% and 50% respectively and increased the amplitude of cardiac oscillations by 23% compared to zoletyl-nitrous oxide anesthesia. There were no significant changes of the amplitudes of myogenic and respiratory oscillations with zoletil-nitrous oxide anesthesia compared to the zoletil-xylazine mixture. CONCLUSION We suggest that the different influence of anesthesia modes on the amplitudes of skin blood flow oscillations is associated with sympathetic activity suppressed by zoletil-xylazine anesthesia.
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Affiliation(s)
- M E Astashev
- Institute of Cell Biophysics, Russian Academy of Science, Pushchino, Moscow region, Russia
| | - D A Serov
- Institute of Fundamental Problems of Biology, Russian Academy of Science, Pushchino, Moscow region, Russia
| | - A V Tankanag
- Institute of Cell Biophysics, Russian Academy of Science, Pushchino, Moscow region, Russia
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Astashev ME, Serov DA, Tankanag AV. A Study of the Oscillatory Components of the Skin Microhemodynamics in Mice by Laser Doppler Flowmetry. Biophysics (Nagoya-shi) 2018. [DOI: 10.1134/s0006350918010025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Lapi D, Mastantuono T, Di Maro M, Varanini M, Colantuoni A. Low-Frequency Components in Rat Pial Arteriolar Rhythmic Diameter Changes. J Vasc Res 2017; 54:344-358. [PMID: 29065409 DOI: 10.1159/000478984] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 01/04/2023] Open
Abstract
This study aimed to analyze the frequency components present in spontaneous rhythmic diameter changes in rat pial arterioles. Pial microcirculation was visualized by fluorescence microscopy. Rhythmic luminal variations were evaluated via computer-assisted methods. Spectral analysis was carried out on 30-min recordings under baseline conditions and after administration of acetylcholine (Ach), papaverine (Pap), Nω-nitro-L-arginine (L-NNA) prior to Ach, indomethacin (INDO), INDO prior to Ach, charybdotoxin and apamin, and charybdotoxin and apamin prior to Ach. Under baseline conditions all arteriolar orders showed 3 frequency components in the ranges of 0.0095-0.02, 0.02-0.06, and 0.06-0.2 Hz, another 2 in the ranges of 0.2-2.0 and 2.5-4.5 Hz, and another ultra-low-frequency component in the range of 0.001-0.0095 Hz. Ach caused a significant increase in the spectral density of the frequency components in the range of 0.001-0.2 Hz. Pap was able to slightly increase spectral density in the ranges of 0.001-0.0095 and 0.0095-0.02 Hz. L-NNA mainly attenuated arteriolar responses to Ach. INDO prior to Ach did not affect the endothelial response to Ach. Charybdotoxin and apamin, suggested as endothelium-derived hyperpolarizing factor inhibitors, reduced spectral density in the range of 0.001-0.0095 Hz before and after Ach administration. In conclusion, regulation of the blood flow distribution is due to several mechanisms, one of which is affected by charibdotoxin and apamin, modulating the vascular tone.
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Affiliation(s)
- Dominga Lapi
- Department of Clinical Medicine and Surgery, Federico II University Medical School, Naples, Italy
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Tankanag AV, Grinevich AA, Tikhonova IV, Chaplygina AV, Chemeris NK. Phase synchronization of skin blood flow oscillations in humans under asymmetric local heating. Biophysics (Nagoya-shi) 2017. [DOI: 10.1134/s0006350917040212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Lapi D, Varanini M, Colantuoni A, Del Seppia C, Ghione S, Fommei E, Scuri R. Repeated Mandibular Extension in Rat: A Procedure to Modulate the Cerebral Arteriolar Tone. Front Physiol 2017; 8:625. [PMID: 28912722 PMCID: PMC5583213 DOI: 10.3389/fphys.2017.00625] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 08/11/2017] [Indexed: 11/16/2022] Open
Abstract
Previous data have shown both in the rat and in the human that a single mandibular extension lasting 10 min induces a significant important and prolonged reduction in blood pressure and heart rate, affecting also rat pial microcirculation by the release of endothelial factors. In the present work, we assessed whether repeated mandibular extension could further prolong these effects. We performed two mandibular extensions, the second mandibular extension being applied 10 min after the first one. The second mandibular extension produced a reduction in blood pressure and heart rate for at least 240 min. As in the case of a single mandibular extension, pial arterioles dilated persisting up to 140 min after the second extension. Spectral analysis on 30 min recordings under baseline conditions and after repetitive mandibular extensions showed that the pial arterioles dilation was associated with rhythmic diameter changes sustained by an increase in the frequency components related to endothelial, neurogenic, and myogenic activity while a single mandibular extension caused, conversely, an increase only in the endothelial activity. In conclusion, repetitive mandibular extension prolonged the effects of a single mandibular extension on blood pressure, heart rate and vasodilation and induced a modulation of different frequency components responsible of the pial arteriolar tone, in particular increasing the endothelial activity.
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Affiliation(s)
- Dominga Lapi
- Department of Clinical Medicine and Surgery, School of Medicine, University of Naples Federico IINaples, Italy
| | - Maurizio Varanini
- Institute of Clinical Physiology, National Council of ResearchPisa, Italy
| | - Antonio Colantuoni
- Department of Clinical Medicine and Surgery, School of Medicine, University of Naples Federico IINaples, Italy
| | | | - Sergio Ghione
- Medical and Public Health Research, Fondazione Toscana Gabriele Monasterio (CNR)Pisa, Italy
| | - Enza Fommei
- Medical and Public Health Research, Fondazione Toscana Gabriele Monasterio (CNR)Pisa, Italy
| | - Rossana Scuri
- Department of Translational Research on New Technologies in Medicine and Surgery, University of PisaPisa, Italy
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Grinevich AA, Tankanag AV, Safronova VG, Chemeris NK. Role of additive stochastic modulation of the heart activity in the formation of 0.1-Hz blood flow oscillations in the human cardiovascular system. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2016; 468:106-11. [PMID: 27411819 DOI: 10.1134/s0012496616030054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Indexed: 11/23/2022]
Abstract
In the framework of our previous hypothesis about the participation of structural and hydrodynamic properties of the vascular bed in the formation of the 0.1-Hz component of blood flow oscillations in the human cardiovascular system and on the basis of the reduced hydrodynamic model, the role of additive stochastic perturbations of the operation of the single-chamber pump that simulates the heart was investigated. It was shown that aperiodic noise modulation of the rigidity of the walls of the pump or its valves generates low-frequency oscillations of pressure and blood flow velocity of arterial vascular bed with the maximum amplitude at a frequency close to 0.1 Hz.
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Affiliation(s)
- A A Grinevich
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia.
| | - A V Tankanag
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
| | - V G Safronova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
| | - N K Chemeris
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Moscow oblast, 142290, Russia
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18
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Processing of laser Doppler flowmetry signals from healthy subjects and patients with varicose veins: Information categorisation approach based on intrinsic mode functions and entropy computation. Med Eng Phys 2015; 37:553-9. [DOI: 10.1016/j.medengphy.2015.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 02/14/2015] [Accepted: 03/27/2015] [Indexed: 11/18/2022]
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Anisimova AV, Krupatkin AI, Sidorov VV, Zakharkina MV, Yutskova EV, Galkin SS. Characteristics of microcirculation in patients with acute ischemic stroke and chronic cerebral ischemia. Zh Nevrol Psikhiatr Im S S Korsakova 2015; 115:27-32. [DOI: 10.17116/jnevro20151153227-32] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tankanag AV, Grinevich AA, Kirilina TV, Krasnikov GV, Piskunova GM, Chemeris NK. Wavelet phase coherence analysis of the skin blood flow oscillations in human. Microvasc Res 2014; 95:53-9. [DOI: 10.1016/j.mvr.2014.07.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/04/2014] [Accepted: 07/05/2014] [Indexed: 11/25/2022]
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21
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Fedorovich AA, Rogoza AN, Chikhladze NM. Characteristics of functional state of arteriolar and venular skin microvessels in patients with essential arterial hypertension. Microvasc Res 2014; 93:105-13. [DOI: 10.1016/j.mvr.2014.04.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 04/11/2014] [Accepted: 04/12/2014] [Indexed: 11/30/2022]
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Dunaev AV, Sidorov VV, Krupatkin AI, Rafailov IE, Palmer SG, Stewart NA, Sokolovski SG, Rafailov EU. Investigating tissue respiration and skin microhaemocirculation under adaptive changes and the synchronization of blood flow and oxygen saturation rhythms. Physiol Meas 2014; 35:607-21. [DOI: 10.1088/0967-3334/35/4/607] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Krasnikov GV, Tyurina MY, Tankanag AV, Piskunova GM, Chemeris NK. Involvement of the sympatho-vagal balance in the formation of respiration-dependent oscillations in the human cardiovascular system. ACTA ACUST UNITED AC 2014. [DOI: 10.1134/s0362119714010095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Krasnikov GV, Tyurina MY, Tankanag AV, Piskunova GM, Chemeris NK. Analysis of heart rate variability and skin blood flow oscillations under deep controlled breathing. Respir Physiol Neurobiol 2012; 185:562-70. [PMID: 23174619 DOI: 10.1016/j.resp.2012.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Revised: 11/08/2012] [Accepted: 11/12/2012] [Indexed: 10/27/2022]
Abstract
The effect of deep breathing controlled in both rate (0.25, 0.16, 0.1, 0.07, 0.05 and 0.03 Hz) and amplitude on the heart rate variability (HRV) and respiration-dependent oscillations of forearm/finger skin blood flow (SBF) has been studied in 29 young healthy volunteers. The influence of sympathovagal balance on the respiratory sinus arrhythmia (RSA) amplitude and respiratory SBF oscillations has been studied. The subjects with predominant parasympathetic tonus had statistically significant higher RSA amplitudes in the breathing rate region of 0.03-0.07 Hz than the subjects with predominant sympathetic tonus. In the finger-cushion zone, having a well-developed sympathetic vascular innervations, the amplitudes of respiratory SBF oscillations at breathing rates 0.05 and 0.07 Hz were higher in the group of subjects with predominant parasympathetic tonus. In the forearm skin, where the density of sympathetic innervations is low comparatively to that in the finger skin, no statistically significant differences in the amplitude of respiratory SBF oscillations were found concerning the two groups of subjects.
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Affiliation(s)
- Gennady V Krasnikov
- Tula State Lev Tolstoy Pedagogical University, Prospekt Lenina, 125, Tula 300026, Russia
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Tikhonova IV, Tankanag AV, Chemeris NK. Age-related changes of skin blood flow during postocclusive reactive hyperemia in human. Skin Res Technol 2012; 19:e174-81. [DOI: 10.1111/j.1600-0846.2012.00624.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2012] [Indexed: 12/01/2022]
Affiliation(s)
- Irina V. Tikhonova
- Institute of Cell Biophysics; Russian Academy of Sciences; Institutskaya st. 3; Pushchino; Moscow Region; 142290; Russia
| | - Arina V. Tankanag
- Institute of Cell Biophysics; Russian Academy of Sciences; Institutskaya st. 3; Pushchino; Moscow Region; 142290; Russia
| | - Nikolay K. Chemeris
- Institute of Cell Biophysics; Russian Academy of Sciences; Institutskaya st. 3; Pushchino; Moscow Region; 142290; Russia
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Scully CG, Karaboué A, Liu WM, Meyer J, Innominato PF, Chon KH, Gorbach AM, Lévi F. Skin surface temperature rhythms as potential circadian biomarkers for personalized chronotherapeutics in cancer patients. Interface Focus 2010; 1:48-60. [PMID: 21544221 DOI: 10.1098/rsfs.2010.0012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Chronotherapeutics involve the administration of treatments according to circadian rhythms. Circadian timing of anti-cancer medications has been shown to improve treatment tolerability up to fivefold and double efficacy in experimental and clinical studies. However, the physiological and the molecular components of the circadian timing system (CTS), as well as gender, critically affect the success of a standardized chronotherapeutic schedule. In addition, a wrongly timed therapy or an excessive drug dose disrupts the CTS. Therefore, a non-invasive approach to accurately detect and monitor circadian rhythms is needed for a dynamic assessment of the CTS in order to personalize chronomodulated drug delivery schedule in cancer patients. Since core body temperature is a robust circadian biomarker, we recorded temperature at multiple locations on the skin of the upper chest and back of controls and cancer patients continuously. Variability in the circadian phase existed among patch locations in individual subjects over the course of 2-6 days, demonstrating the need to monitor multiple skin temperature locations to determine the precise circadian phase. Additionally, we observed that locations identified by infrared imaging as relatively cool had the largest 24 h temperature variations. Disruptions in skin temperature rhythms during treatment were found, pointing to the need to continually assess circadian timing and personalize chronotherapeutic schedules.
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Affiliation(s)
- Christopher G Scully
- Biomedical Engineering and Physical Science, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, USA
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Tikhonova IV, Tankanag AV, Chemeris NK. Time–amplitude analysis of skin blood flow oscillations during the post-occlusive reactive hyperemia in human. Microvasc Res 2010; 80:58-64. [DOI: 10.1016/j.mvr.2010.03.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Revised: 03/01/2010] [Accepted: 03/17/2010] [Indexed: 10/19/2022]
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Tikhonova IV, Tankanag AV, Chemeris NK. Age-related differences in the dynamics of the skin blood flow oscillations during postocclusive reactive hyperemia. ACTA ACUST UNITED AC 2010. [DOI: 10.1134/s0362119710020143] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Krupatkin AI. Oscillatory structures of blood flow reflect the dynamics of information processes in microcirculatory networks. ACTA ACUST UNITED AC 2010. [DOI: 10.1134/s0362119710020131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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30
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Tankanag AV, Chemeris NK. A method of adaptive wavelet filtering of the peripheral blood flow oscillations under stationary and non-stationary conditions. Phys Med Biol 2009; 54:5935-48. [DOI: 10.1088/0031-9155/54/19/018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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