Related Experiment Video
Updated: Jul 19, 2026

Protein Digestion, Ultrafiltration, and Size Exclusion Chromatography to Optimize the Isolation of Exosomes from Human Blood Plasma and Serum
Published on: April 13, 2018
Does serum albumin/phospholipid index better reflect overall protein status in man?
O O Ogunkeye1, S I Ighogboja, K O Adeniyi
1Department of Chemical Pathology, Faculty of Medical Sciences, University of Jos, Nigeria.
Insights
The serum albumin/phospholipid index (API) can distinguish malnourished children from well-nourished ones. However, it may not offer advantages over serum albumin alone for assessing protein status.
Area of Science:
- Biochemistry
- Clinical Nutrition
- Pediatrics
Background:
- Serum albumin concentration is a standard but insufficient indicator of protein status.
- Malnourished children exhibit increased serum phospholipid levels as protein status declines.
Purpose of the Study:
- To evaluate the efficacy of the serum albumin/phospholipid index (API) in assessing protein status.
- To compare API with serum albumin in distinguishing malnourished from well-nourished individuals.
Main Methods:
- Assessed serum albumin/phospholipid index (API) in healthy adults and malnourished/well-nourished children.
- Compared API values between groups, including age- and sex-matched controls.
Main Results:
- API effectively differentiated malnourished children from their well-nourished counterparts.
- No significant difference in API was observed between well-nourished children and adults.
- Serum albumin alone also demonstrated discrimination between malnourished and well-nourished children.
Conclusions:
- The serum albumin/phospholipid index (API) shows potential in identifying protein malnutrition in children.
- API may not offer a significant improvement over serum albumin alone for protein status assessment in humans.
Abstract:
Serum albumin concentration is a commonly used, but inadequate index of protein status in man. A study of serum lipid changes in malnourished children reported a progressive increase in serum phospholipid concentration with deterioration of protein status in the children. This led us to assess the usefulness of serum albumin/phospholipid index (API) in groups of healthy young adults, malnourished children, and their age-and-sex-matched well-nourished controls. We found that API discriminated between malnourished and well-nourished children. There was no difference between the index for well-nourished children and adults in spite of differences in body sizes. However, since serum albumin showed a similar discrimination between malnourished and well-nourished children, API may possibly not be superior to serum albumin in the assessment of protein status in man.
Related Concept Videos
Drug Distribution: Plasma Protein Binding
Factors Affecting Protein-Drug Binding: Protein-Related Factors
The physicochemical properties of a drug play a significant role in its ability to bind to proteins. Lipophilic drugs, which dissolve in fats, oils, and lipids, can be bound by...
Factors Affecting Protein-Drug Binding: Patient-Related Factors
Age stands as a key determinant in protein-drug binding. Neonates, characterized by low albumin content, experience heightened concentrations of unbound drugs such as phenytoin and...
Blood Studies for Cardiovascular System III: Serum Lipid Profile
Serum lipids are fats and fatty substances in the blood and are crucial for various bodily functions, including energy storage, cellular structure, and hormone production. Serum lipids consist of cholesterol, triglycerides, and phospholipids.
Cholesterol is a soft, fat-like substance found in all body cells. It is crucial for producing hormones, vitamin D, and substances that aid...
Nephrotic Syndrome II : Assessment and Medical Management
Serum Studies: Renal Function Tests

