Quantification of platelet function: a comparative study of venous and arterial blood using a novel flow cytometry protocol

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Quantification of platelet function : a comparative study of venous and arterial blood using a novel flow cytometry protocol

Törnudd, Mattias (author): Linköpings universitet,Avdelningen för diagnostik och specialistmedicin,Medicinska fakulteten,Region Östergötland, Thorax-kärlkliniken i Östergötland

Al Ghraoui, Mohamad Rodwan (author): Cardiovascular Research Centre, School of Medical Sciences, Örebro University, Örebro, Sweden

Wahlgren, Sofia (author): Linköpings universitet,Avdelningen för diagnostik och specialistmedicin,Medicinska fakulteten,Region Östergötland, Thorax-kärlkliniken i Östergötland

Björkman, Erik (author): Linköpings universitet,Avdelningen för diagnostik och specialistmedicin,Medicinska fakulteten,Region Östergötland, Thorax-kärlkliniken i Östergötland

Berg, Sören, 1954- (author): Linköpings universitet,Avdelningen för diagnostik och specialistmedicin,Medicinska fakulteten,Region Östergötland, Thorax-kärlkliniken i Östergötland

Kvitting, John-Peder Escobar (author): Department of Cardiothoracic Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway

Alfredsson, Joakim, 1962- (author): Linköpings universitet,Avdelningen för diagnostik och specialistmedicin,Medicinska fakulteten,Region Östergötland, Kardiologiska kliniken US

Ramström, Sofia, 1973- (author): Linköpings universitet,Örebro universitet,Institutionen för medicinska vetenskaper,Department of Clinical Chemistry, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden,Avdelningen för klinisk kemi och farmakologi,Medicinska fakulteten,Region Östergötland, Klinisk kemi,Cardiovascular Research Centre, School of Medical Sciences, Örebro University, Örebro, Sweden

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2022-01-24
2022
English.
In: Platelets. - Abingdon, United Kingdom : Taylor & Francis. - 0953-7104 .- 1369-1635. ; 33:6, s. 926-934

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Studies of platelet function in surgical patients often involve both arterial and venous sampling. Possible effects of different sampling sites could be important, but have not been thoroughly investigated. We aimed to compare platelet function in arterial and venous blood samples using a novel flow cytometry protocol and impedance aggregometry. Arterial and venous blood was collected before anesthesia in 10 patients undergoing cardiac surgery of which nine was treated with acetylsalicylic acid until the day before surgery. Flow cytometry included simultaneous analysis of phosphatidylserine exposure, active conformation of the fibrinogen receptor (PAC-1 binding), alpha-granule and lysosomal release (P-selectin and LAMP-1 exposure) and mitochondrial membrane integrity. Platelets were activated with ADP or peptides activating thrombin receptors (PAR1-AP/PAR4-AP) or collagen receptor GPVI (CRP-XL). Leukocyte-platelet conjugates and P-selectin exposure were evaluated immediately in fixated samples. For impedance aggregometry (Multiplate (R)), ADP, arachidonic acid, collagen and PAR1-AP (TRAP) were used as activators. Using impedance aggregometry and in 27 out of 37 parameters studied with flow cytometry there was no significant difference between venous and arterial blood sampling. Arterial blood showed more PAC-1 positive platelets when activated with PAR1-AP or PAR4-AP and venous blood showed more monocyte-platelet and neutrophil-platelet conjugates and higher phosphatidylserine exposure with CRP-XL alone and combined with PAR1-AP or PAR4-AP. We found no differences using impedance aggregometry. In conclusion, testing of platelet function by flow cytometry and impedance aggregometry gave comparable results for most of the studied parameters in venous and arterial samples. Flow cytometry identified differences in PAC-1 binding when activated with PAR1-AP, exposure of phosphatidyl serine and monocyte/neutrophil-platelet conjugates, which might reflect differences in blood sampling technique or in flow conditions in this patient cohort with coronary artery disease. These differences might be considered when comparing data from different sample sites, but caution should be exercised if a different protocol is used or another patient group is studied.

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By the author/editor: Törnudd, Mattias; Al Ghraoui, Moha ...; Wahlgren, Sofia; Björkman, Erik; Berg, Sören, 195 ...; Kvitting, John-P ...; show more...; Alfredsson, Joak ...; Ramström, Sofia, ...; show less...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Hematology

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Cardiac and Card ...

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By the university: Örebro University; Linköping University

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Quantification of platelet function : a comparative study of venous and arterial blood using a novel flow cytometry protocol

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