Acute and Critical Care

Review Article

Basic science and research
Two-photon intravital imaging of leukocyte migration during inflammation in the respiratory system: Young Min Kim, Soi Jeong, Young Ho Choe, Young-Min Hyun; Acute Crit Care. 2019;34(2):101-107. Published online May 31, 2019; DOI: https://doi.org/10.4266/acc.2019.00542

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Two-photon intravital imaging is a powerful method by which researchers are able to directly observe biological phenomena in live organisms. Researchers in various biomedical research fields have applied two-photon imaging to a variety of target organs by utilizing this technology’s ability to penetrate to significant depths with minimal phototoxicity. The mouse respiratory system in inflammation models is a good example, as two-photon intravital imaging can provide insights as to how the immune system is activated in response to inflammation within the respiratory system. Inflammation models can be generated via influenza viral, bacterial, or lipopolysaccharide injection. To exteriorize the lungs or trachea, thoracotomy or tracheotomy is performed, respectively; the appropriate combination of inflammation induction and organ exposure is selected depending on the study purpose. On the other hand, visualizing the movement of leukocytes is also an important component; to this end, immune cell populations of interest are either labeled via the genetic attachment of fluorescent proteins or stained with antibodies or dyes. With the proper selection of methods at each step, twophoton intravital imaging can yield visual evidence regarding immune responses to inflammation.

Citations

Citations to this article as recorded by

Live-Cell Imaging Quantifies Changes in Function and Metabolic NADH Autofluorescence During Macrophage-Mediated Phagocytosis of Tumor Cells
Shelby N. Bess, Matthew J. Igoe, Timothy J. Muldoon
Immunological Investigations.2024; 53(2): 210. CrossRef
Integration of immune cells in organs-on-chips: a tutorial
Lisette Van Os, Britta Engelhardt, Olivier T. Guenat
Frontiers in Bioengineering and Biotechnology.2023;[Epub] CrossRef
Intravital Imaging of Pulmonary Immune Response in Inflammation and Infection
Nazli Alizadeh-Tabrizi, Stefan Hall, Christian Lehmann
Frontiers in Cell and Developmental Biology.2021;[Epub] CrossRef
Probe-based intravital microscopy: filling the gap between in vivo imaging and tissue sample microscopy in basic research and clinical applications
Katrien Van Dyck, Eliane Vanhoffelen, Jonas Yserbyt, Patrick Van Dijck, Marco Erreni, Sophie Hernot, Greetje Vande Velde
Journal of Physics: Photonics.2021; 3(3): 032003. CrossRef

Case Report

Neurosurgery/Hematology
Fatal Intracranial Hemorrhage in a Patient with Disseminated Intravascular Coagulation associated with Sepsis: Hyun Jin Baek, Doo Hyuk Lee, Kyu Hyung Han, Young Min Kim, Hyunbeom Kim, Byeongwook Cho, Inkuk Lee, Kanghyun Choi, Hojin Yong, Goohyeon Hong; Korean J Crit Care Med. 2016;31(2):134-139. Published online May 31, 2016; DOI: https://doi.org/10.4266/kjccm.2016.31.2.134

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Abstract PDF

In critically ill patients, disseminated intravascular coagulation (DIC) is a common and fatal hematological disorder. DIC is a physiological response to a variety of underlying stimuli that provoke generalized activation of the hemostatic mechanism and is common in septic patients and those with hematological or non-hematological malignant neoplasms. Bleeding is a common clinical feature, and diffuse or multiple-site mucocutaneous bleeding, such as petechia, ecchymosis and hemorrhage from gastrointestinal tract, is often seen. A 58-year-old male was recently diagnosed with intracranial hemorrhage (ICH) caused by DIC associated with sepsis. Mortality of ICH caused by DIC is very high because the underlying condition cannot be quickly treated. Awareness of the possibility of DIC developing in a critically ill patient and the need for immediate initiation of plasma or platelet replacement therapy are important. To the best of our knowledge, this is the first reported case of intracranial hemorrhage in a Korean patient with DIC associated with sepsis.

Citations

Citations to this article as recorded by

Abdominal mass in a septic infant: Case of a fatal intraluminal intestinal hematoma
Mana Taweevisit, Paul Scott Thorner
Pediatric Hematology Oncology Journal.2021; 6(3): 139. CrossRef
Perforated Mesenteric Cyst with Sepsis and Neurological Complication in a 9 Month Old Child
Mandal KC, Saha D, Halder P, Chakraborty P, Debnath B, Mukhopadhyay B
Asploro Journal of Pediatrics and Child Health.2020; 2(1): 30. CrossRef

Original Articles

The Effects of Mild Hypothermia on the Expression of the Apoptosis-related Proteins following Transient Global Ischemia in Gerbil Hippocampus: Young Min Kim, Kyu Nam Park, Seung Pil Choi, Tai Yong Hong, Se Kyung Kim; Korean J Crit Care Med. 2007;22(1):30-41.

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Abstract PDF: BACKGROUND
The neuroprotective mechanisms of hypothermia remain unclear. Recently, attenuation of apoptosis by hypothermia has been suggested as one of the responsible mechanisms. The aim of this study is to investigate the effects of post-ischemic hypothermia on apoptotic neuronal death as well as expression of some apoptosis-related proteins in a gerbil transient global ischemia model.
METHODS
Following 5 minutes of ischemia, normothermia (NT, 37+/-0.5degrees C) or mild hypothermia (HT, 33+/-0.5degrees C) was immediately induced and maintained for 3 hours. The hippocampal CA1 neurons were examined on day 2, 3, 4, and 7 after ischemia for the survived neuronal densities, DNA nick end labeling and immunohistochemical expressions of Bcl-2, Bax, and caspase 3 in each group. Additionally, DNA gel electrophoresis and western blot analysis for each protein in hippocampus were performed. RESULTS: The neuronal death in CA1 area on day 3, 4, and 7 was significantly reduced in HT group compared to NT group. The number of TUNEL positive cells in HT group was also significantly reduced than NT group on day 3, 4, and 7. DNA laddering of hippocampus on day 4 and 7 also reduced in HT group. Expressions of Bax on days 2, 3 and activated caspase 3 on days 3, 4 were reduced in HT group. Western blots also disclosed a decrease in the intensity of the Bax on day 2 and 3 in HT group compared to NT group. CONCLUSIONS: These results suggest that mild post-ischemic hypothermia attenuates the apoptotic neuronal death through the inhibition of the intrinsic pathway of caspase activation following transient global ischemia and these effects may be related to a reduction of pro-apoptotic events.

Electrolyte and Gas Analysis from Dorsal Vein of Hand during General Inhalational Anesthesia: Keon Kang, Se Hun Park, Chul Ho Shin, Soon Eun Park, Young Min Kim, Dae Woo Kim, Young Woo Cho; Korean J Crit Care Med. 2005;20(1):76-81.

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Abstract PDF: BACKGROUND
To assess the acid-base status and to measure PO2 and PCO2, arterial blood gases (ABG) has been checked usually. We compared the venous blood gases (VBG) from dorsal vein of hand to ABG from radial artery, and tried to determine whether venous blood gas analysis (VBGA) could be the alternative of ABGA. METHODS: Thirty patients who needed continuous arterial pressure monitoring were chosen. At the completion of stability of HR and BP after induction of general inhalational anesthesia, the ABG from radial artery and VBG from dorsal vein of hand were compared. RESULTS: Laboratory findings were as follows (mean+/-SD): arterial pH, 7.44+/-0.04; venous pH, 7.43+/-0.04; arterial HCO3-, 25.56+/-2.39 mmol/L; venous HCO3-, 25.51+/-2.09 mmol/L. The mean values of arterial and venous PO2 were significantly different (247.8+/-48.9 mmHg versus 187.8+/-41.6 mmHg), but the arterial and venous PO2 values were significantly correlated (r=0.706). The PCO2 (r= 0.883), pH (r=0.912), and HCO3- (r=0.901) values, and base excesses of arterial and venous blood (r=0.926) were highly correlated. Also, arterial and venous serum electrolyte (sodium, potassium, and calcium) were highly correlated. CONCLUSIONS: Venous blood gas analysis from dorsal vein of hand can be effectively used as the alternative method to evaluate the acid-base status, PO2, and PCO2, instead of ABGA during general inhalational anesthesia.

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