TY - JOUR
T1 - Pediatric immune thrombocytopenia
T2 - apoptotic markers may help in predicting the disease course
AU - Levy-Mendelovich, Sarina
AU - Aviner, Shraga
AU - Sharon, Nechama
AU - Miskin, Hagit
AU - Yacobovich, Joanne
AU - Kenet, Gili
AU - Hauschner, Hagit
AU - Rosenberg, Nurit
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to the International Pediatric Research Foundation, Inc.
PY - 2021/7
Y1 - 2021/7
N2 - Background: In all, 15–30% of pediatric immune thrombocytopenia (ITP) patients will remain chronically thrombocytopenic at 1 year post diagnosis. All attempts to classify patients at diagnosis have proven unsuccessful. We hypothesized that a different pathophysiology is responsible for non-chronic versus chronic pediatric ITP. We aimed to examine differences in the apoptotic markers’ presentation at diagnosis between non-chronic and chronic patients. Methods: Blood samples were collected from 42 pediatric patients with newly diagnosed ITP prior to initiation of treatment. We incubated patients’ sera with control platelets and compared the results among three research groups: healthy controls, chronic ITP, and non-chronic ITP patients. We measured apoptotic markers phosphatidylserine (PS) exposure and mitochondrial inner membrane potential (ΔΨm) by flow cytometry and the level of human apoptotic proteins by Human Apoptosis Array. Results: We found increased platelet PS exposure and decreased ΔΨm in response to all ITP patients’ sera compared to control subjects. Human Apoptotic Array revealed an increased expression of five apoptotic proteins: BIM, CD40, IGFBP2, P21, and SMAC, following sera incubation of non-chronic pediatric ITP patients, compared to chronic patients’ sera, at diagnosis. Conclusions: Our data contribute to knowledge on apoptosis markers that may aid in predicting the prognosis of children with ITP. Impact: The key message of our article is that children with chronic ITP have a different apoptotic profile compared to non-chronic ITP.Addition to existing literature: This is the first study comparing apoptotic markers between children with chronic ITP to non-chronic ITP.Impact: Our findings indicate that, in the future, apoptotic markers may help to classify ITP patients into non-chronic versus chronic ones, at diagnosis.
AB - Background: In all, 15–30% of pediatric immune thrombocytopenia (ITP) patients will remain chronically thrombocytopenic at 1 year post diagnosis. All attempts to classify patients at diagnosis have proven unsuccessful. We hypothesized that a different pathophysiology is responsible for non-chronic versus chronic pediatric ITP. We aimed to examine differences in the apoptotic markers’ presentation at diagnosis between non-chronic and chronic patients. Methods: Blood samples were collected from 42 pediatric patients with newly diagnosed ITP prior to initiation of treatment. We incubated patients’ sera with control platelets and compared the results among three research groups: healthy controls, chronic ITP, and non-chronic ITP patients. We measured apoptotic markers phosphatidylserine (PS) exposure and mitochondrial inner membrane potential (ΔΨm) by flow cytometry and the level of human apoptotic proteins by Human Apoptosis Array. Results: We found increased platelet PS exposure and decreased ΔΨm in response to all ITP patients’ sera compared to control subjects. Human Apoptotic Array revealed an increased expression of five apoptotic proteins: BIM, CD40, IGFBP2, P21, and SMAC, following sera incubation of non-chronic pediatric ITP patients, compared to chronic patients’ sera, at diagnosis. Conclusions: Our data contribute to knowledge on apoptosis markers that may aid in predicting the prognosis of children with ITP. Impact: The key message of our article is that children with chronic ITP have a different apoptotic profile compared to non-chronic ITP.Addition to existing literature: This is the first study comparing apoptotic markers between children with chronic ITP to non-chronic ITP.Impact: Our findings indicate that, in the future, apoptotic markers may help to classify ITP patients into non-chronic versus chronic ones, at diagnosis.
UR - http://www.scopus.com/inward/record.url?scp=85099873433&partnerID=8YFLogxK
U2 - 10.1038/s41390-020-01355-9
DO - 10.1038/s41390-020-01355-9
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C2 - 33504961
AN - SCOPUS:85099873433
SN - 0031-3998
VL - 90
SP - 93
EP - 98
JO - Pediatric Research
JF - Pediatric Research
IS - 1
ER -