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Analyzing Platelet Subpopulations by Multi-color Flow Cytometry
Published on: June 10, 2025
Platelets can reflect the severity of Crohn's disease without the effect of anemia
Lin Li1, Ping Xu1, Zhongchen Zhang1
1Department of Gastroenterology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
Insights
Platelet (PLT) counts are higher in inflammatory bowel disease (IBD) patients. Elevated PLT levels can indicate Crohn's disease severity, but this association was not found in ulcerative colitis.
Area of Science:
- Gastroenterology
- Hematology
- Immunology
Background:
- Anemia and altered platelet (PLT) counts are frequent in inflammatory bowel disease (IBD).
- The diagnostic utility of PLT count as an independent marker for IBD severity requires further investigation.
Purpose of the Study:
- To determine if platelet count can serve as an independent indicator of inflammatory bowel disease (IBD) severity.
- To analyze the correlation between platelet count and various clinical parameters in Crohn's disease (CD) and ulcerative colitis (UC).
Main Methods:
- Compared PLT counts between 137 CD patients, 69 UC patients, and 412 healthy controls.
- Analyzed the influence of anemia, C-reactive protein (CRP), age, CD activity index (CDAI), and Mayo score on PLT counts.
- Utilized receiver operating characteristic (ROC) curves to assess the diagnostic value and establish cut-off values for PLT in relation to disease severity.
Main Results:
- CD and UC patients exhibited significantly higher PLT counts compared to healthy controls (p<0.001).
- In CD patients, higher PLT counts were associated with anemia, iron deficiency anemia (IDA), elevated CRP, and high CDAI (p<0.001).
- Multivariate analysis confirmed a positive correlation between PLT count and CD severity (p<0.001), establishing a cut-off value of 298×10^9/L; however, a similar independent association was not observed in UC patients.
Conclusions:
- Platelet count can serve as an independent indicator of disease severity in Crohn's disease.
- The study did not find sufficient evidence to support platelet count as an independent marker for ulcerative colitis severity.
Objectives:
Anemia and changes in platelets (PLT) are common in inflammatory bowel disease (IBD). In our study, we aimed to verify whether PLT count can independently reflect the severity of IBD.
Methods:
In our hospital, 137 Crohn's Disease (CD), 69 Ulcerative colitis (UC) patients, and 412 healthy controls were included to compare the differences in PLT count. In addition, the effect of anemia, C-reactive protein (CRP), age, CD activity index (CDAI) or Mayo on PLTs was also analyzed. If PLTs independently affected CD or UC, we used the receiver operating characteristic (ROC) curve to verify the diagnostic value and obtain the cut-off value of PLT.
Results:
CD and UC patients had higher PLT than controls (p<0.001, p<0.001; respectively). In CD patients, the results showed that patients with anemia (P<0.01), Iron Deficiency Anemia (IDA) (p<0.001), CRP≥8 mg/L (p=0.046), and CDAI≥150 (p<0.001) had higher PLT, while in UC patients, those with anemia (p=0.018), CRP≥8 mg/L (p=0.045), and Mayo≥3 (p=0.029) had higher PLT. Univariate analysis showed that CDAI was positively correlated with PLT count (p<0.001), while hemoglobin (p=0.001) and age (p<0.001) were negatively correlated with PLT in CD. In UC patients, Mayo (p=0.001) and CRP (p<0.001) were positively correlated with PLT, while hemoglobin (p=0.002) was negatively correlated. Finally, by linear stepwise multivariate analysis, we clarified the positive relationship between PLT and CD (p<0.001) by eliminating the interference of hemoglobin, and determined the cut-off value of PLT as 298×109/L. For UC, we did not obtain similar results.
Conclusions:
PLT can be an indicator of disease severity in CD, while there is a lack of evidence regarding this finding in UC.
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