Serum albumin levels and inflammation

Area of Science:

• Clinical Chemistry
• Biochemistry
• Immunology

Background:

• Albumin is the primary plasma protein, crucial for fluid balance, acid-base homeostasis, and molecular transport.
• C-reactive protein (CRP) is an acute-phase reactant produced by hepatocytes, serving as a key biomarker for inflammation.
• Existing knowledge suggests inverse relationships between albumin and acute-phase reactants like CRP during inflammatory states.

Purpose of the Study:

• To investigate the correlation between serum albumin levels and common inflammatory markers.
• To assess the relationship between albumin, C-reactive protein (CRP), white blood cell (WBC) count, and platelet (PLT) count in a large patient cohort.
• To examine these correlations within specific hospital departments.

Main Methods:

• Retrospective analysis of 4434 hospitalized patients (ages 18-107) at Galilee Medical Center over three months.
• Statistical assessment of correlations between albumin and CRP, WBC, PLT, and hemoglobin levels.
• Linear regression analysis to evaluate the effect of CRP on albumin levels.

Main Results:

• A significant negative correlation was observed between albumin and CRP (r = -0.311) and between albumin and WBC (r = -0.157).
• Positive correlations were found between albumin and platelets (r = 0.084) and albumin and hemoglobin (r = 0.513).
• The strongest negative albumin-CRP correlation was in Internal Medicine; CRP had a minor effect on albumin, evident only at very high CRP levels (>500 mg/L).

Conclusions:

• A notable inverse relationship exists between serum albumin and inflammatory markers, particularly CRP, in hospitalized patients.
• The findings support the clinical observation of declining albumin during inflammatory processes.
• Further investigation is warranted to elucidate the specific biological mechanisms driving the inverse correlation between albumin and CRP.