Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model
Background Despite the importance of microcirculation in organ function, monitoring microcirculation is not a routine practice. With developments in microscopic technology, incident dark field (IDF) microscopy (Cytocam) has allowed visualization of the microcirculation. Dorsal skinfold chamber (DSC)...
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doaj-2479ce1ff1784e688cf8d93b436ae93c2021-03-05T04:40:39ZengKorean Society of Critical Care MedicineAcute and Critical Care2586-60522586-60602021-02-01361293610.4266/acc.2020.009691287Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber modelChristine Kang0Ah-Reum Cho1Hyeon Jeong Lee2Hyae Jin Kim3Eun-Jung Kim4Soeun Jeo5Jeong-Min Hong6Daehoan Moon7 Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Dental Anesthesia and Pain Medicine, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, Korea Department of Anesthesia and Pain Medicine, Pusan National University School of Medicine, Yangsan, KoreaBackground Despite the importance of microcirculation in organ function, monitoring microcirculation is not a routine practice. With developments in microscopic technology, incident dark field (IDF) microscopy (Cytocam) has allowed visualization of the microcirculation. Dorsal skinfold chamber (DSC) mouse model has been used to investigate microcirculation physiology. By employing Cytocam-IDF imaging with DSC model to assess microcirculatory alteration in lipopolysaccharide (LPS)-induced endotoxemia, we attempted to validate availability of Cytocam-IDF imaging of microcirculation. Methods DSC was implanted in eight BALB/c mice for each group; control and sepsis. Both groups were given 72 hours to recover from surgery. The sepsis group had an additional 24-hour period of recovery post-LPS injection (4 mg/kg). Subsequently, a video of the microcirculation was recorded using Cytocam. Data on microcirculatory variables were obtained. Electron microscopy was implemented using lanthanum fixation to detect endothelial glycocalyx degradation. Results The microcirculatory flow index was significantly lower (control, 2.8±0.3; sepsis, 2.1±0.8; P=0.033) and heterogeneity index was considerably higher (control, 0.10±0.15; sepsis, 0.53±0.48; P=0.044) in the sepsis group than in the control group. Electron microscopy revealed glycocalyx demolishment in the sepsis group. Conclusions Cytocam showed reliable ability for observing changes in the microcirculation under septic conditions in the DSC model. The convenience and good imaging quality and the automatic analysis software available for Cytocam-IDF imaging, along with the ability to perform real-time in vivo experiments in the DSC model, are expected to be helpful in future microcirculation investigations.http://www.accjournal.org/upload/pdf/acc-2020-00969.pdfdorsal skinfold chamber modelglycocalyxincident dark fieldmicrocirculationsepsis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Christine Kang Ah-Reum Cho Hyeon Jeong Lee Hyae Jin Kim Eun-Jung Kim Soeun Jeo Jeong-Min Hong Daehoan Moon |
spellingShingle |
Christine Kang Ah-Reum Cho Hyeon Jeong Lee Hyae Jin Kim Eun-Jung Kim Soeun Jeo Jeong-Min Hong Daehoan Moon Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model Acute and Critical Care dorsal skinfold chamber model glycocalyx incident dark field microcirculation sepsis |
author_facet |
Christine Kang Ah-Reum Cho Hyeon Jeong Lee Hyae Jin Kim Eun-Jung Kim Soeun Jeo Jeong-Min Hong Daehoan Moon |
author_sort |
Christine Kang |
title |
Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
title_short |
Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
title_full |
Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
title_fullStr |
Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
title_full_unstemmed |
Feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
title_sort |
feasibility study of incident dark-field video microscope for measuring microcirculatory variables in the mouse dorsal skinfold chamber model |
publisher |
Korean Society of Critical Care Medicine |
series |
Acute and Critical Care |
issn |
2586-6052 2586-6060 |
publishDate |
2021-02-01 |
description |
Background Despite the importance of microcirculation in organ function, monitoring microcirculation is not a routine practice. With developments in microscopic technology, incident dark field (IDF) microscopy (Cytocam) has allowed visualization of the microcirculation. Dorsal skinfold chamber (DSC) mouse model has been used to investigate microcirculation physiology. By employing Cytocam-IDF imaging with DSC model to assess microcirculatory alteration in lipopolysaccharide (LPS)-induced endotoxemia, we attempted to validate availability of Cytocam-IDF imaging of microcirculation. Methods DSC was implanted in eight BALB/c mice for each group; control and sepsis. Both groups were given 72 hours to recover from surgery. The sepsis group had an additional 24-hour period of recovery post-LPS injection (4 mg/kg). Subsequently, a video of the microcirculation was recorded using Cytocam. Data on microcirculatory variables were obtained. Electron microscopy was implemented using lanthanum fixation to detect endothelial glycocalyx degradation. Results The microcirculatory flow index was significantly lower (control, 2.8±0.3; sepsis, 2.1±0.8; P=0.033) and heterogeneity index was considerably higher (control, 0.10±0.15; sepsis, 0.53±0.48; P=0.044) in the sepsis group than in the control group. Electron microscopy revealed glycocalyx demolishment in the sepsis group. Conclusions Cytocam showed reliable ability for observing changes in the microcirculation under septic conditions in the DSC model. The convenience and good imaging quality and the automatic analysis software available for Cytocam-IDF imaging, along with the ability to perform real-time in vivo experiments in the DSC model, are expected to be helpful in future microcirculation investigations. |
topic |
dorsal skinfold chamber model glycocalyx incident dark field microcirculation sepsis |
url |
http://www.accjournal.org/upload/pdf/acc-2020-00969.pdf |
work_keys_str_mv |
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