RT Journal Article
SR Electronic
T1 Changes of platelet morphology, ultrastructure and function in patients with acute ischemic stroke based on super-resolution microscopy
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2022.11.29.518340
DO 10.1101/2022.11.29.518340
A1 Yang, Bingxin
A1 Wang, Xifeng
A1 Hu, Xiaoyu
A1 Xiao, Yao
A1 Xu, Xueyu
A1 Yu, Xiaomei
A1 Wang, Min
A1 Luo, Honglian
A1 Li, Jun
A1 Ma, Yan
A1 Shen, Wei
YR 2022
UL http://biorxiv.org/content/early/2022/11/30/2022.11.29.518340.abstract
AB Platelets are important in acute ischemic stroke (AIS) thrombosis. The observation and evaluation of platelet ultrastructure and efficacy of antiplatelet drug in AIS patients is difficult due to microscopic limitations and sensitivity of platelet. The new super-resolution microscope (SIM) can accurately, quickly analyze the platelet ultrastructure and antiplatelet drug in AIS patients. We applied SIM to observe the morphology and ultrastructure of platelets with AIS patients in different state. SIM images were analyzed to specify the dense granules and α granules change of platelets in AIS patients. Testing platelet factor 4 (PF4) to reflect platelet releasing function. We observed that platelet activation in AIS patients was greater after stimulation, with α granule showing a pattern of parenchymatous masses. SIM images analyzing showed diameter of platelets, average size of granules, area% of granules per field and mean area of granules per platelet in AIS patient were lower than healthy people. Platelet releasing function was suppressed at rest stage and more efficacy release after stimulation. 2MeSamp inhibited parenchymatous masses of α granules and reduced PF4 release of platelets after stimulation. According to the results, the structure and function of platelets in AIS patients are indeed altered. Additionally, SIM could be used as a new method to indicates the onset of AIS and assess antiplatelet drugs.Competing Interest StatementThe authors have declared no competing interest.ADPadenosine diphosphateAISacute ischemic strokeβ-TGβ-thromboglobulinCVDcerebrovascular diseaseCOX-1cyclooxygenase-1EHelder healthy people (>60 years old)PF4platelet factor 4SIMsuper-resolution microscopeTHthrombinTIAtransient ischemic attacksvwfvon willebrand factorYHyoung healthy people (18~60 years old)2MeSAMP2-methyl-thioadenosine-monophosphate, in vivo form of p2y12 receptor antagonist.