الفهرس 
Acute Lymphoblastic LeukemiaOnly 14 pages are availabe for public view
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Abstract
Background: Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer.It is a disease of monoclonal proliferation of hematopoietic precursor cells of the lymphoid series within the bone marrow. Leptin is a peptide hormone which is predominantly produced by white adipose tissue. The main function of leptin in the human body is the regulation of energy expenditure and control of appetite.It is supposed to be involved in the pathogenesis of hematological malignancy through its proliferative, anti-apoptotic, and differentiating effects on hematopoietic neoplastic cells ,in addition to its synergestic effect on vascular endothelial growth factor (VGEF).
Objectives: To evaluate serum leptin level in children with acute lymphoblastic leukemia at diagnosis and at day 28 post induction chemotherapy,and to test the association between serum leptin levels and anthropometric measures of ALL patients and prognostic markers of ALL as age, gender, initial WBCS count, extramedullary infiltration to organs and CSF, cytogenetics, and response to treatment.
Patients and Methods: This is a case- control study performed at Clinical Pathology Department, Ain Shams University Hospitals. The study was conducted on 30 ALL pediatric patients admitted to Hematology & Oncology Unit, Pediatric Department, Ain Shams University Hospitals.The patients were evaluated at diagnosis before intake of chemotherapy and at day 28 post-induction chemotherapy , and 25 healthy controls matched with patients in age, sex, BMI.
Results: Serum leptin level is elevated in ALL patients at diagnosis as compared to controls.It has no significant relation with patients age, sex, BMI. It is elevated in patients who received cranial radiotherapy and those who relapsed..However, it has no significant relation with clinical data (fever ,lymphadenopathy and organomegaly) and laboratory characteristics (CBC , percentage of blasts infiltrating bone marrow and peripheral blood ,immunophenotyping and cytogenetics) of ALL patients.
Conclusion: Data from our study showed that elevated leptin level in ALL patients can be considered a risk factor involved in ALL pathogenesis.It can be used as a biomarker for ALL diagnosis, a prognostic factor for ALL patients on chemotherapy , and a predicting factor for relapse.