Correlation between leukocyte-associated plasma proteins and white cell differential count

Area of Science:

• Hematology
• Oncology
• Biochemistry

Background:

• Plasma protein quantification in hematopoietic malignancies is crucial for understanding cellular processes.
• Leukemia involves abnormal white blood cell proliferation and differentiation, potentially altering cellular protein expression.

Purpose of the Study:

• To investigate and compare plasma protein patterns in various myeloid leukemia subtypes and normal controls.
• To correlate specific plasma proteins with different cell types and differentiation stages within acute myeloid leukemia.

Main Methods:

• Quantification of prealbumin, albumin, orosomucoid (orosomucoid2), alpha 1-antitrypsin, haptoglobin, and transferrin using crossed immunoelectrophoresis.
• Analysis of 107 cell samples from acute myeloid leukemia, chronic myeloid leukemia, polycythemia, and normal blood leukocytes.
• Statistical multivariate analyses to correlate protein patterns with diagnoses and white blood cell differential counts.

Main Results:

• Acute myeloid leukemia cell samples exhibited significantly different protein patterns compared to other groups and normal controls.
• Protein patterns were significantly correlated with specific cell types in acute leukemia, with differential counts explaining 29% of the variation.
• Alpha 1-antitrypsin correlated with myeloblasts, orosomucoid2 and haptoglobin with mature granulocytes, and albumin with lymphocytes.

Conclusions:

• Plasma protein profiles can serve as biomarkers for distinguishing acute myeloid leukemia from other myeloid disorders and normal cells.
• Specific plasma proteins are associated with distinct myeloid cell types and differentiation states, indicating cell-specific uptake mechanisms.
• Defective granulocyte maturation in treated acute myeloid leukemia may manifest as reduced orosomucoid2 expression.