Abstract Background STAB-1 (common lymphatic endothelial and vascular endothelial receptor) was found to be expressed on tumor lymphatic vessels in different malignancies and it is a bad prognostic marker. This study will assess the role of serum stabilin1 (STAB1) as a prognostic marker in adult patients with newly diagnosed acute leukemia and correlate it with the other well established prognostic markers. Acute lymphoblastic leukemia (ALL) is a hematologic malignancy arising from precursors of the lymphoid lineage. Conventional cytotoxic chemotherapies have resulted in high cure rates of up to 90% in pediatric ALL, but the outcomes for adult patients remain suboptimal with 5-year survival rates of only 30%-40%. Aim of the Work To measure STAB1 expression in patients with AML and patients with ALL and assess its role as a prognostic factor with correlating it with other prognostic factors. Patients and Methods A case control study in Ain Shams University Hospitals, Clinical Haematology and Oncolgy division of Internal Medicine Department for one year on total 75 subjects divided into: 25 patients with newly diagnosed acute myeloid leukemia (AML), 25 patients with newly diagnosed acute lymphoblastic leukemia (ALL) and 25 age and sex matched healthy control subjects. The study population was recruited from Ain Shams University Hospitals, Clinical Haematology and Oncolgy division of Internal Medicine Department. Results There was no significant difference between cases of acute leukemia pts and control group as there was no statistically significant difference between control and patients group regarding sex, age, spleen size, liver size, LDH, CRP, uric acid and ESR of the studied subjects. Our study shows that as regard CBC; there was significant difference between the studied groups as regard leucocytic count, BUT Platelets, and hemoglobin was insignificant, which was also described in the study. Our study showed that there was high statistically significant difference between the acute leukemia patients and the healthy control group as regard sabilin1. Our study shows that the mean serum level of stabilin1 in the patients who didn’t respond to chemotherapy was higher than that of the patients that responded to chemotherapy. Conclusion There was high statistically significant difference between the studied groups as stabilin1. There was significant correlation between stabilin2 and chemotherapy response. Stabilin1 expression levels also identified a new subgroup at a higher risk for relapse and with a poor prognosis in acute leukemia patients. Stabilin 1 can be used as a prognostic factor in patients with acute leukemia.
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