Name: Autor destacado: Un método novedoso para el análisis integral de los componentes celulares de los coágulos sanguíneos cerebrales
Uploaded: 2023-07-21T13:30:00
Description: Watch this Scientific Journal Video about A Novel Method for Comprehensive Cell Component Analysis of Cerebral Blood Clots at JoVE.com

Esta investigación fue financiada por la Oficina de Ciencia y Tecnología de la ciudad de Xiamen (3502Z20227197) y la Oficina de Ciencia y Tecnología de la provincia de Fujian (No. 2019J01070, No.2021Y0027).

La investigación se realizó de acuerdo con las directrices institucionales del Comité de Ética Médica de la Universidad de Huaqiao. Los coágulos sanguíneos cerebrales se extirparon quirúrgicamente y se recogieron en el Primer Hospital de Quanzhou, afiliado a la Universidad Médica de Fujian, con el consentimiento informado de los pacientes.
1. Pretratamiento de coágulos de sangre
<ol><li>Coloque los coágulos en un plato limpio, agregue 5 ml de solución salina fisi...

Un método basado en enzimas fibrinolíticas para estudiar los componentes de las células trombosas cerebrales

<ol>
	<li>Park, D. W., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Edoxaban+versus+dual+antiplatelet+therapy+for+leaflet+thrombosis+and+cerebral+thromboembolism+after+TAVR:+The+ADAPT-TAVR+Randomized+clinical+trial.">Edoxaban versus dual antiplatelet therapy for leaflet thrombosis and cerebral thromboembolism after TAVR: The ADAPT-TAVR Randomized clinical trial.</a> Circulation. 146 (6), 466-479 (2022).</li><li>Devasagayam, S., Wyatt, B., Leyden, J., Kleinig, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cerebral+venous+sinus+thrombosis+incidence+is+higher+than+previously+thought:+a+retrospective+population-based+study.">Cerebral venous sinus thrombosis incidence is higher than previously thought: a retrospective population-based study.</a> Stroke. 47 (9), 2180-2182 (2016).</li><li>Sacco, R. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+updated+definition+of+stroke+for+the+21st+century:+a+statement+for+healthcare+professionals+from+the+American+Heart+Association/American+Stroke+Association.">An updated definition of stroke for the 21st century: a statement for healthcare professionals from the American Heart Association/American Stroke Association.</a> Stroke. 44 (7), 2064-2089 (2013).</li><li>Thalin, C., Hisada, Y., Lundstrom, S., Mackman, N., Wallen, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Neutrophil+extracellular+traps:+villains+and+targets+in+arterial,+venous,+and+cancer-associated+thrombosis.">Neutrophil extracellular traps: villains and targets in arterial, venous, and cancer-associated thrombosis.</a> Arteriosclerosis Thrombosis and Vascular Biology. 39 (9), 1724-1738 (2019).</li><li>Mocsai, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diverse+novel+functions+of+neutrophils+in+immunity,+inflammation,+and+beyond.">Diverse novel functions of neutrophils in immunity, inflammation, and beyond.</a> Journal of Experimental Medicine. 210 (7), 1283-1299 (2013).</li><li>Dhanesha, N., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PKM2+promotes+neutrophil+activation+and+cerebral+thromboinflammation:+therapeutic+implications+for+ischemic+stroke.">PKM2 promotes neutrophil activation and cerebral thromboinflammation: therapeutic implications for ischemic stroke.</a> Blood. 139 (8), 1234-1245 (2022).</li><li>Ducroux, C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Thrombus+neutrophil+extracellular+traps+content+impair+tpa-induced+thrombolysis+in+acute+ischemic+stroke.">Thrombus neutrophil extracellular traps content impair tpa-induced thrombolysis in acute ischemic stroke.</a> Stroke. 49 (3), 754-757 (2018).</li><li>Solomon, C., Ranucci, M., Hochleitner, G., Schochl, H., Schlimp, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assessing+the+methodology+for+calculating+platelet+contribution+to+clot+strength+(platelet+component)+in+thromboelastometry+and+thrombelastography.">Assessing the methodology for calculating platelet contribution to clot strength (platelet component) in thromboelastometry and thrombelastography.</a> Anesthesia and Analgesia. 121 (4), 868-878 (2015).</li><li>Daraei, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Automated+fiber+diameter+and+porosity+measurements+of+plasma+clots+in+scanning+electron+microscopy+images.">Automated fiber diameter and porosity measurements of plasma clots in scanning electron microscopy images.</a> Biomolecules. 11 (10), 1536 (2021).</li><li>Abbasi, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diverse+thrombus+composition+in+thrombectomy+stroke+patients+with+longer+time+to+recanalization.">Diverse thrombus composition in thrombectomy stroke patients with longer time to recanalization.</a> Thrombosis Research. 209, 99-104 (2022).</li><li>C W Francis, a., Marder, V. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Concepts+of+clot+lysis.">Concepts of clot lysis.</a> Annual Review of Medicine. 37 (1), 187-204 (1986).</li><li>Xu, R., Ma, G., Chen, L., Cui, X. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Preparation and application of natural fibrinolytic enzyme from peanut worm. , (2019).</li><li>Fotso Fotso, A., Drancourt, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Laboratory+Diagnosis+of+tick-borne+african+relapsing+fevers:+latest+developments.">Laboratory Diagnosis of tick-borne african relapsing fevers: latest developments.</a> Front Public Health. 3, 254 (2015).</li><li>Liou, G. Y., Byrd, C. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Diagnostic+bioliquid+markers+for+pancreatic+cancer:+What+we+have+vs.+what+we+need.">Diagnostic bioliquid markers for pancreatic cancer: What we have vs. what we need.</a> Cancers (Basel). 15 (9), 2446 (2023).</li><li>Tang, M., Lin, H., Hu, C., Yan, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Affinity+purification+of+a+fibrinolytic+enzyme+from+Sipunculus+nudus.">Affinity purification of a fibrinolytic enzyme from Sipunculus nudus.</a> Journal of Visualized Experiments. 196, e65631 (2023).</li><li>Ge, Y. H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+Novel+antithrombotic+protease+from+marine+worm+Sipunculus+Nudus.">A Novel antithrombotic protease from marine worm Sipunculus Nudus.</a> International Journal Of Molecular Sciences. 19 (10), 3023 (2018).</li><li>Talukder, M. A., Menyuk, C. R., Kostov, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Distinguishing+between+whole+cells+and+cell+debris+using+surface+plasmon+coupled+emission.">Distinguishing between whole cells and cell debris using surface plasmon coupled emission.</a> Biomedical Optics Express. 9 (4), 1977-1991 (2018).</li><li>Shapiro, D. J., Hicks, L. A., Pavia, A. T., Hersh, A. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Antibiotic+prescribing+for+adults+in+ambulatory++care+in+the+USA,+2007-09.">Antibiotic prescribing for adults in ambulatory care in the USA, 2007-09.</a> Journal of Antimicrobial Chemotherapy. 69 (1), 234-240 (2014).</li></ol>

El sFE es un agente fibrinolítico que puede degradar la fibrina de forma directa y eficaz12,16. Aquí, el sFE se empleó para degradar la fibrina reticulada de los coágulos sanguíneos cerebrales, liberar las células encerradas dentro de los coágulos y analizar los componentes celulares de los coágulos cualitativa y cuantitativamente. Los datos de la microscopía y el examen de sangre de rutina indicaron que las células encerradas se liberaron de los coágu...

La enfermedad cerebrovascular es una de las tres principales enfermedades que pueden amenazar la salud humana, entre las cuales la enfermedad cerebrovascular isquémica representa más del 80%. La trombosis cerebral y la trombosis venosa cerebral son las enfermedades cerebrovasculares isquémicas más preocupantes en la actualidad, causadas principalmente por coágulos sanguíneos cerebrales 1,2. Si el tratamiento no se realiza adecuadamente, tendrá altas tasas de discapacidad y mortalidad y una alta tasa de recurrencia después del alta3.
Recientemente, un número creciente de estudios ha demostrado que los componentes celulares de los coágulos sanguíneos cerebrales están estrechamente correlacionados con el diagnóstico, tratamiento y pronóstico de la trombosis cerebral 4,5,6. Por lo tanto, la disponibilidad de datos sobre la composición de los trombos, especialmente los componentes celulares, es importante para el diagnóstico clínico y el tratamiento. Desafortunadamente, los métodos disponibles actualmente no pueden analizar exhaustivamente el componente del coágulo de sangre cuantitativa y cualitativamente. Por ejemplo, la tinción in situ basada en Martius Scarlett Blue solo puede estudiar los glóbulos rojos/blancos de ciertas rebanadas del coágulo7. La tinción in situ basada en la inmunohistoquímica (IHQ) solo puede estudiar componentes sanguíneos limitados de ciertos cortes del coágulo utilizando sus anticuerpos8. Los métodos basados en imágenes microscópicas solo se ocupan de la estructura específica del coágulo9. Además, todos estos métodos son laboriosos y requieren mucho tiempo10. Hasta la fecha, no se han descrito los procedimientos para estudiar cuantitativa y cualitativamente los componentes de las células trombos cerebrales. Es ampliamente reconocido que la fibrina reticulada envuelve firmemente las células sanguíneas en los coágulos11. En consecuencia, la degradación específica de la fibrina reticulada y la liberación de las células intactas es fundamental para el análisis preciso de los componentes celulares.
Trabajos previos aislaron una enzima fibrinolítica de Sipunculus nudus (sFE), que puede degradar la fibrina de manera específica y rápida12. En este trabajo, se propuso un método para analizar los componentes celulares de los trombos cerebrales basado en la actividad única de sFE. Este protocolo utilizó sFE para degradar primero la fibrina de los coágulos y luego analizó los componentes celulares mediante tinción de Wright y análisis de sangre de rutina13,14. De acuerdo con este método, los componentes celulares de los trombos cerebrales pueden ser estudiados cuantitativa y cualitativamente. Este protocolo simple y efectivo podría aplicarse para el análisis de componentes celulares de otros coágulos sanguíneos.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Agglutination Reaction Plate</td>
			<td>ROTEST</td>
			<td>RTB-4003</td>
			<td></td>
		</tr>
		<tr>
			<td>Auto Hematology Analyzer</td>
			<td>SYSMEX</td>
			<td>XNB2</td>
			<td></td>
		</tr>
		<tr>
			<td>Automatic Vertical Pressure Steam Sterilizer&#160;</td>
			<td>SANYO</td>
			<td>MLS-3750</td>
			<td></td>
		</tr>
		<tr>
			<td>Centrifuge Tube (1.5 mL)</td>
			<td>Biosharp</td>
			<td>BS-15-M</td>
			<td></td>
		</tr>
		<tr>
			<td>Clean bench</td>
			<td>AIRTECH</td>
			<td>BLB-1600</td>
			<td></td>
		</tr>
		<tr>
			<td>Constant Temperature Incubator</td>
			<td>JINGHONG</td>
			<td>JHS-400</td>
			<td></td>
		</tr>
		<tr>
			<td>Culture Dish (100 mm)</td>
			<td>NEST</td>
			<td>704001</td>
			<td></td>
		</tr>
		<tr>
			<td>DHG Series Heating and Drying Oven&#160;</td>
			<td>SENXIN</td>
			<td>DGG-9140AD</td>
			<td></td>
		</tr>
		<tr>
			<td>Electronic Analytical Balance</td>
			<td>DENVER</td>
			<td>TP-213</td>
			<td></td>
		</tr>
		<tr>
			<td>Filter Membrane (0.22 &#181;m)</td>
			<td>Millex GP</td>
			<td>SLGP033NK</td>
			<td></td>
		</tr>
		<tr>
			<td>Micro Refrigerated Centrifuge&#160;</td>
			<td>Cence</td>
			<td>H1650-W</td>
			<td></td>
		</tr>
		<tr>
			<td>Microscope Slides</td>
			<td>CITOGLAS</td>
			<td>01-30253-50</td>
			<td></td>
		</tr>
		<tr>
			<td>Milli-Q Reference</td>
			<td>Millipore</td>
			<td>Z00QSV0CN</td>
			<td></td>
		</tr>
		<tr>
			<td>Normal Saline</td>
			<td>CISEN</td>
			<td>H37022337</td>
			<td></td>
		</tr>
		<tr>
			<td>Optical Microscope</td>
			<td>Nikon</td>
			<td>ECLIPSE E100</td>
			<td></td>
		</tr>
		<tr>
			<td>Parafilm</td>
			<td>Bemis</td>
			<td>PM-996</td>
			<td></td>
		</tr>
		<tr>
			<td>Phosphate-Buffered Saline</td>
			<td>Beyotime</td>
			<td>C0221A</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipette Tip (1 mL )</td>
			<td>Axygene</td>
			<td>T-1000XT-C</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipette Tip (200 &#181;L)</td>
			<td>Axygene</td>
			<td>T-200XT-C</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipettor (1 mL)</td>
			<td>Thermo Fisher Scientific</td>
			<td>ZY18723</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipettor (200 &#181;L)</td>
			<td>Thermo Fisher Scientific</td>
			<td>ZY20280</td>
			<td></td>
		</tr>
		<tr>
			<td>Scalpel</td>
			<td>MARTOR</td>
			<td>23111</td>
			<td></td>
		</tr>
		<tr>
			<td>Small-sized Vortex Oscillator</td>
			<td>Kylin-Bell</td>
			<td>VORTEX KB3</td>
			<td></td>
		</tr>
		<tr>
			<td>Tweezer</td>
			<td>Hystic</td>
			<td>HKQS-180</td>
			<td></td>
		</tr>
		<tr>
			<td>Wright Staining Solution</td>
			<td>Beyotime</td>
			<td>C0135-500ml</td>
			<td></td>
		</tr>
	</tbody>
</table>

a comprehensive approach to analyze the cell components of cerebral blood clots

La trombosis cerebral, un coágulo de sangre en una arteria o vena cerebral, es el tipo más común de infarto cerebral. El estudio de los componentes celulares de los coágulos sanguíneos cerebrales es importante para el diagnóstico, el tratamiento y el pronóstico. Sin embargo, los enfoques actuales para estudiar los componentes celulares de los coágulos se basan principalmente en la tinción in situ , que no es adecuada para el estudio exhaustivo de los componentes celulares porque las células están firmemente envueltas en los coágulos. Estudios anteriores han aislado con éxito una enzima fibrinolítica (sFE) de Sipunculus nudus, que puede degradar la fibrina reticulada directamente, liberando los componentes celulares. Este estudio estableció un método integral basado en el sFE para estudiar los componentes celulares del trombo cerebral. Este protocolo incluye la disolución de coágulos, la liberación de células, la tinción de células y el examen de sangre de rutina. De acuerdo con este método, los componentes celulares podrían estudiarse cuantitativa y cualitativamente. Se muestran los resultados representativos de los experimentos realizados con este método.

Cerebrovascular disease is one of three major diseases that can threaten human health, among which ischemic cerebrovascular disease accounts for more than 80%. Cerebral thrombosis and cerebral vein thrombosis are the most concerned ischemic cerebrovascular diseases today, mainly caused by cerebral blood clots1,2. If the treatment is not done properly, it will have high disability and mortality rates and a high recurrence rate after discharge3.
Recently, a growing number of studies have shown that the cell components of cerebral blood clots are tightly correlated with the diagnosis, treatment, and prognosis of cerebral thrombosis4,5,6. Therefore, the availability of data on thrombus composition, especially the cell components, is important for clinical diagnosis and treatment. Unfortunately, the currently available methods cannot comprehensively analyze the blood clot component quantitatively and qualitatively. For example, Martius Scarlett Blue based in-situ staining can only study the red/white blood cells of certain slices of the clot7. Immunohistochemistry (IHC) based in-situ staining can only study limited blood components of certain slices of the clot using their antibodies8. The microscopic image-based methods are only concerned with the specific structure of the clot9. Moreover, all those methods are laborious and time-consuming10. To date, the procedures for quantitatively and qualitatively studying cerebral thrombi cell components have not been reported. It is widely acknowledged that the cross-linked fibrin tightly wraps the blood cells in the clots11. Consequently, the specific degradation of the cross-linked fibrin and release of the intact cells is critical for the accurate analysis of cell components.
Previous works isolated a fibrinolytic enzyme from Sipunculus nudus (sFE), which can degrade the fibrin specifically and quickly12. Herein, a method for analyzing the cell components of the cerebral thrombi based on the unique activity of sFE was proposed. This protocol utilized sFE to degrade the fibrin of clots first and then analyzed the cell components by Wright&#39;s Staining and routine blood examination13,14. According to this method, the cell components of cerebral thrombi can be quantitatively and qualitatively studied. This simple and effective protocol might be applied for the cell component analysis of other blood clots.

Autor destacado: Un método novedoso para el análisis integral de los componentes celulares de los coágulos sanguíneos cerebrales 

Un enfoque integral para analizar los componentes celulares de los coágulos sanguíneos cerebrales

Our research mainly focuses on cerebral thrombosis. Many studies have shown that cerebral blood clot cell component correlate with the diagnosis, treatment, and prognosis of cerebral thrombosis. In this study, we established a novel method for the analysis of cell component of cerebral blood clots.This challenge in analyzing cell components of cerebral blood clots is the release of entire shaft from blood clots. This is because the clots leaked fibering tiry rash, the blood cells in the clots. Targeted approaches to starting the cell components of the clots are best done in C2 standing, which is unsuitable for the comprehensive starting of the cell components.On the contrary, our method enables both quantitative and qualitative enlightenings of the cerebral slope cell components. Our method utilizes fibrinolytic enzyme to delay the fibering in blood clots, releasing the intact cells. The data obtained from the analysis of the cell components will facilitate the study of the mechanisms of cerebral thrombosis at a molecular level.Our team will continue to focus on the study of fibrinolysis and coagulation system.

En la etapa inicial del proceso de degradación, se encontró que los coágulos de sangre tenían una estructura compacta roja y la solución de trabajo era incolora. Después de la incubación durante 30 minutos, la solución de trabajo se volvió de color rojo claro, lo que indicaba que las células sanguíneas cruzadas se liberaron en la solución de trabajo. La mayoría de los coágulos se disolvieron al alargar el tiempo de incubación a 5 h, y la solución de trabajo se volvió de color rojo claro. Por el contrario...

Watch this Scientific Journal Video about A Novel Method for Comprehensive Cell Component Analysis of Cerebral Blood Clots at JoVE.com

Este estudio describe un método rápido y eficaz para el análisis de componentes celulares de coágulos sanguíneos cerebrales a través de la disolución de coágulos, la tinción celular y el examen de sangre de rutina.

Cerebral thrombosis, a blood clot in a cerebral artery or vein, is the most common type of cerebral infarction. The study of the cell components of ...

Nuestra investigación se centra principalmente en la trombosis cerebral. Muchos estudios han demostrado que los componentes de las células del coágulo sanguíneo cerebral se correlacionan con el diagnóstico, el tratamiento y el pronóstico de la trombosis cerebral. En este estudio, establecimos un método novedoso para el análisis de los componentes celulares de los coágulos sanguíneos cerebrales.Este desafío en el análisis de los componentes celulares de los coágulos sanguíneos cerebrales es la liberación de todo el cuerpo de los coágulos sanguíneos. Esto se debe a que los coágulos se filtraron fibrosamente y las células sanguíneas en los coágulos. Los enfoques dirigidos para iniciar los componentes celulares de los coágulos se realizan mejor en C2 de pie, lo que no es adecuado para el inicio completo de los componentes celulares.Por el contrario, nuestro método permite esclarecer tanto cuantitativa como cualitativamente los componentes celulares de la pendiente cerebral. Nuestro método utiliza una enzima fibrinolítica para retrasar la fibraformación de los coágulos sanguíneos, liberando las células intactas. Los datos obtenidos del análisis de los componentes celulares facilitarán el estudio de los mecanismos de la trombosis cerebral a nivel molecular.Nuestro equipo continuará centrándose en el estudio de la fibrinólisis y el sistema de coagulación.

a-comprehensive-approach-to-analyze-cell-components-cerebral-blood

Research

JoVE Journal

Biochemistry

A Comprehensive Approach to Analyze the Cell Components of Cerebral Blood Clots

Cerebral thrombosis, a blood clot in a cerebral artery or vein, is the most common type of cerebral infarction. The study of the cell components of cerebral blood clots is important for diagnosis, treatment, and prognosis. However, the current approaches to studying the cell components of the clots are mainly based on in situ staining, which is unsuitable for the comprehensive study of the cell components because cells are tightly wrapped in the clots. Previous studies have successfully isolated a fibrinolytic enzyme (sFE) from Sipunculus nudus, which can degrade the cross-linked fibrin directly, releasing the cell components. This study established a comprehensive method based on the sFE to study the cell components of cerebral thrombus. This protocol includes clot dissolving, cell releasing, cell staining, and routine blood examination. According to this method, the cell components could be studied quantitatively and qualitatively. The representative results of experiments using this method are shown.

This study describes a fast and effective method for the cell component analysis of cerebral blood clots through clot dissolving, cell staining, and routine blood examination.

Investigación

Bioquímica

Cerebral Thrombus Clot Dissolution and Cell Staining for Cell Component Analyses

To begin, place the collected cerebral blood clot samples on a clean dish using tweezers. Then, using a pipette, add five milliliters of physiological saline to it and gently shake the dish. Remove the saline using a pipette.Using a pair of scissors, chop the clots into small pieces. Once again, add five milliliters of physiological saline to the clots and shake the dish gently before aspirating the saline with a pipette. Then, using tweezers, transfer the pieces of clots to a new, clean U-plate.Prepare the SFE working solution by adjusting the concentration of SFE to 2, 000 units per milliliter using physiological saline. Add 300 microliters of the SFE working solution to the pretreated clots. To initiate the first round of degradation, incubate the mixture of SFE and clots at 37 degrees Celsius for half an hour.After that, gently shake to mix the SFE treated sample. And using a clean pipette, transfer the liquid portion to a sterile tube. Set aside the remaining clot for another round of degradation.Centrifuge the collected liquid at 200 G for five minutes at four degrees Celsius. Next, using a pipette, transfer the supernatant or the recovered SFE solution to another clean tube. Resuspend the resultant cell pellet in 50 microliters of physiological saline by gentle mixing.After this, perform subsequent rounds of degradation on the remaining clots using the recovered SFE solution as demonstrated previously. Gather the cell mixture from each round of degradation to prepare the blood cell sample. Add five microliters of the obtained cell sample to the poly-L-lysine-coated glass slide.And using a cover slip, smear the cells. Allow the liquid to evaporate at room temperature. To perform cell staining, gently add 100 microliters of rights dye to the cell smear.Allow the cells to stain for 30 minutes at room temperature before gently rinsing the dye off with clean water. Finally, examine the stained cells using a light microscope. Compact red blood clots with a colorless working solution were observed during the early stage of degradation.Clot dissolution was observed after a 30-minute incubation and a prolonged incubation of up to five hours dissolved most clots, while there was no significant change in the negative control group, even after a 10-hour incubation. After a right staining, mature red blood cells, platelets, and various granulocytes were clearly identifiable under a light microscope. The cell components could be quantitatively analyzed with the aid of autohematology successfully.