title: Abnormal correlation of circulating endothelial progenitor cells and endothelin-1 concentration may contribute to the development of arterial hypertension in childhood acute lymphoblastic leukemia survivors.
abstract: It is well known that the rate of arterial hypertension (AH) in childhood acute lymphoblastic leukemia (ALL) survivors is significantly higher than that in the healthy pediatric population; however, the mechanism of this phenomenon is not fully understood. The developing cardiovascular system in children is thought to be highly susceptible to the toxic effects of chemotherapy, which causes damage to the blood vessel wall, including the endothelium. Endothelin-1 (ET-1) is a marker of endothelial damage, and it contributes to AH. Endothelial progenitor cells (EPCs) are derived from the bone marrow and participate in the process of blood vessel repair. The aim of this study was to determine the relationship between the rate of circulating EPCs and plasma levels of ET-1 with respect to hypertension in childhood ALL survivors. The study included 88 childhood ALL survivors and 44 healthy children as controls. All patients and controls had 24-h blood pressure monitoring with a HolCARD CR-07 device. The number of EPCs and the ET-1 serum concentration were measured in the peripheral blood of patients and controls using flow cytometry and enzyme-linked immunosorbent assay, respectively. A correlation was found between the number of EPCs and the ET-1 concentration in the peripheral blood of healthy children and normotensive ALL survivors. However, such a correlation was not found in hypertensive childhood ALL survivors. We conclude that dysregulation of the 'ET-1 and EPC axis' may contribute to the development of AH in some childhood ALL survivors.
authors.affiliation: Department of Pediatrics, Hematology and Oncology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Ociepa
authors.affiliation: Department of Pediatrics, Hematology and Oncology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Bartnik
authors.affiliation: Department of Pediatrics, Hematology and Oncology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Karolina
authors.initials: K
authors.lastname: Zielezinska
authors.affiliation: Department of Pathology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Mai
authors.initials: M
authors.lastname: Prokowska
authors.affiliation: Department of Pathology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Urasinska
authors.affiliation: Department of Pediatrics, Hematology and Oncology, Pomeranian Medical University, Szczecin, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Urasinski
mesh_terms: D000293:Adolescent; D001794:Blood Pressure; D002648:Child; D002675:Child, Preschool; D066026:Endothelial Progenitor Cells; D019332:Endothelin-1 / Q000097:blood*; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000209:etiology; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000097:blood* / Q000150:complications / Q000473:pathology; D017741:Survivors
chemical_list: D019332:Endothelin-1