Dynamic Characteristics of Blood Platelet Count in COVID-19 Patients

2022 ◽  
Vol 12 (4) ◽  
pp. 778-787
Author(s):  
Jiang-Hong An ◽  
Fu-Rong Qi ◽  
Xiao-Ya Cheng ◽  
Xun-Qi Liu ◽  
Pu Luo ◽  
...  

Background and purpose: Coronavirus disease 2019 (COVID-19) was spreading all over the world. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) primarily invades and infects the lungs of humans leading to COVID-19. Mild to severe clinical symptoms such as fever, cough, and shortness of breath were existed in those patients. One of the most common changes in these patients was abnormal blood routine. However, uncertainty remains regarding the dynamic characteristics of platelet in COVID-19 patients due to limited data. Therefore, we aimed to analyze the association between dynamic characteristics of blood platelet and disease severity, and to identify new monitoring indicators to treat the COVID-19 patients. Methods: In this cohort study, 398 COVID-19 patients treated in the Shenzhen Third People’s hospital from December 16, 2019 to March 26, 2020 were collected and participated. All data of participants including the clinical characteristics, imaging and laboratory information were collected. All patients included in our study were classified as four groups (mild, common, severe, and critical types) regarding clinical symptoms and relevant severe failures based on the Diagnosis Criteria. Platelet count was examined at the baseline and every 3–5 days during hospitalization. Results: The platelet count varied with clinical classifications. The platelet count in mild type was normal without significant fluctuation. While the blood platelet count of most common and severe patients had obvious fluctuations, showing as a dynamic change that first rose and then fell to the level at admission, which was consistent with the trend of lung inflammation. Bone marrow smears further showed that bone marrow hyperplasia was normal in mild, common and severe type patients, and megakaryocytes and their platelet-producing functions were not abnormal. Conclusions: Our results suggested that the dynamic changes of platelet count might be a predictor of lung inflammation alteration for COVID-19 patients. The changes in platelet count might be a responsive pattern secondary to lung inflammation. The function of bone marrow may be slightly affected by SARS-CoV-2 infection.

2013 ◽  
pp. 305-311 ◽  
Author(s):  
M. HOFER ◽  
M. POSPÍŠIL ◽  
L. DUŠEK ◽  
Z. HOFEROVÁ ◽  
L. WEITEROVÁ ◽  
...  

Influence of the regulatory system mediated by adenosine A3 receptors on the functioning of erythropoiesis and thrombopoiesis was studied by means of evaluation of the numbers and attributes of peripheral blood erythrocytes and platelets, as well as of erythroid bone marrow progenitor cells in adenosine A3 receptor knock-out (Adora3tm1Jbsn/Adora3tm1Jbsn, A3AR(-/-)) mice and their wild-type C57BL/6 counterparts, both males and females. Minor but statistically significant disturbances in the properties of erythrocytes, namely in the parameters of mean erythrocyte volume and mean erythrocyte hemoglobin were observed in A3AR(-/-) mice. In addition, adenosine A3 receptor knock-out mice were found to exhibit an expressive, statistically significant decrease of their blood platelet count, amounting to 17 % and 21 % in males and females, respectively. This decrease in platelet levels was accompanied by a significant 17 % decline in the plateletcrit in both sexes. The obtained data can help to define therapeutic applications based on the principle of adenosine receptor signaling.


1978 ◽  
Vol 39 (02) ◽  
pp. 346-359 ◽  
Author(s):  
P D Winocour ◽  
M R Turner ◽  
T G Taylor ◽  
K A Munday

SummaryA major limitation to single-cell protein (SCP) as a human food is its high nucleic acid content, the purine moiety of which is metabolised to uric acid. Rats given a Fusarium mould as a source of SCP in diets containing oxonate, a uricase inhibitor, showed elevated plasma and kidney uric acid concentrations after 21 d, which were related to the level of dietary mould. ADP-induced and thrombin-induced platelet aggregation was greater in the hyperuricaemic rats than in controls and a progressive increase in aggregation with increasing levels of dietary mould was observed. Furthermore a time-lag, exceeding the life-span of rat platelets, was observed between the development of hyperuricaemia and the increase in aggregation. A similar time-lag was observed between the lowering of the hyperuricaemia and the reduction of platelet aggregation when oxonate was removed from the diet.If human platelets react to uric acid in the same manner as rat platelets this might explain the link that has been suggested between hyperuricaemia and ischaemic heart disease. In that event diets high in nucleic acids might be contra-indicated in people at risk from ischaemic heart disease.In rats given a low protein diet (50 g casein/kg) for 21 d ADP-induced and thrombin-induced platelet aggregation and whole blood platelet count were reduced compared with control animals receiving 200 g casein/kg diet but not in rats given 90 or 130 g casein/kg diet. A study of the time course on this effect indicated that the reduction both in aggregation tendency and in whole blood platelet count occurred after 4 d of feeding the low protein diet. These values were further reduced with time.


Blood ◽  
1952 ◽  
Vol 7 (9) ◽  
pp. 948-949 ◽  
Author(s):  
KENNETH OTTIS ◽  
OSCAR E. TAUBER

Abstract Healthy, adult male and female golden hamsters, 3 months of age, showed blood platelet count means of 688,000 ± 141,000 per cu. mm. and 742,000 ± 120,000 per cu. mm., respectively, when direct counts were made with siliconized pipets and with Rees and Ecker fluid as a diluent.


Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 2892-2892
Author(s):  
Larry J. Dumont ◽  
L. Lassahn ◽  
Peter A. Tomasulo ◽  
Dennis Harpool ◽  
S. Pinkard ◽  
...  

Abstract BACKGROUND: Apheresis platelet collection from healthy normal blood donors can reduce the donor peripheral blood platelet concentration by 50% or more. The kinetics of peripheral blood platelet count (PLT) recovery in the apheresis donors over the first 24 hours has not been described. The objective of this study was to determine the recovery kinetics of the donor peripheral blood platelet count following apheresis platelet donation. METHODS: Healthy apheresis platelet donors were enrolled following informed consent. The apheresis platelet collection was performed using the Gambro Trima system (Gambro BCT, Lakewood, CO) following local SOP and manufacturer’s directions for use. The minimum predicted post-count was configured in the Trima to no less than 78K plt/μL. PLT was determined pre-procedure (Pre), immediately post procedure (Post), 4–11 h (FU1) and 11–41 h (FU2) post-donation using standard methods. The PLT recovery was evaluated as the increase in PLT following the donation (Delta). The effects of study site, time of sample, and the fraction of platelets collected (Fpc) at donation on Delta were evaluated using a random effects generalized linear regression model. A full regression model of Delta as a function of study site, follow-up period and Fpc with all main and interaction effects was used to test hypotheses. RESULTS: 548 subjects were entered into the study at 3 study sites; Pre-PLT 276±59 × 103 plt/μL, Post-PLT 205±47 × 103 plt/μL, Fpc 25±10%. No adverse events were reported by any subjects. Recovery of platelet count following apheresis platelet donation is variable between subjects; and the independent variables of study site, follow-period and Fpc accounted for 25% of the total variation in Delta. PLT increased 12.4±0.9 × 103 plt/μL by the time of follow-up sampling (p=0.01), although there was no difference between PLT at FU1 (214±49 × 103 plt/μL) and FU2 (212±47 × 103 plt/μL; p=0.15). None of the donors reached their pre-donation platelet count during the follow-up period. There was no difference in Delta between centers (p=0.23). Fpc had a significant affect on Delta (p<0.0001); with estimated Delta of 5.2±0.9 × 103 plt/μL at Fpc=15% and 16.0±.8 × 103 plt/μL at Fpc=30%. CONCLUSION: Platelet recovery following apheresis platelet donation was observed to be dependent on the fraction of platelets donated. Surprisingly, the recovery observed within the first 11 h was equivalent to that observed between 11–42 h, averaging 17.5% of the drop observed during apheresis. Recovery was not complete when observed for up to 41 h following donation in this study. Additional investigation of PLT recovery following apheresis donation is indicated to describe and differentiate the potential roles of de novo production, early pro-platelet release and platelet release from peripheral pools over the early post-donation period.


2010 ◽  
Vol 31 (4) ◽  
pp. 258-262 ◽  
Author(s):  
M Eskola ◽  
S Juutistenaho ◽  
K Aranko ◽  
S Sainio ◽  
R Kekomäki

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