Lipid Isolation
Lipid Isolation - Related Videos
10:23
Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
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Cited by 7 •
2017
Lipid droplets are important organelles for the replication of several pathogens, including the Hepatitis C Virus (HCV). We describe a method to isolate lipid droplets for quantitative mass spectrometry of associated proteins; it can be used under a variety of conditions, such as virus infection, environmental stress, or drug treatment.
12:57
Isolation and Chemical Characterization of Lipid A from Gram-negative Bacteria
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Cited by 66 •
2013
Isolation and characterization of the lipid A domain of lipopolysaccharide (LPS) from gram-negative bacteria provides insight into cell surface based mechanisms of antibiotic resistance, bacterial survival and fitness, and how chemically diverse lipid A molecular species differentially modulate host innate immune responses.
02:57
Isolation of Lipids from Human Blood-Derived Neutrophils by Biphasic Separation
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2025
This video demonstrates lipid isolation from human neutrophils by a biphasic solvent system using methanol and chloroform.
09:47
Isolation and Compositional Analysis of Plant Cuticle Lipid Polyester Monomers
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Cited by 32 •
2015
Lipid polyesters constitute the structural components of two cell wall modifications, the plant cuticle and suberin-containing diffusion barriers. In this video, we describe a method to depolymerize cutin from whole delipidated leaves. The method can be applied to investigating mutants compromised in either cutin or suberin biosynthesis.
09:41
Isolation of Cellular Lipid Droplets: Two Purification Techniques Starting from Yeast Cells and Human Placentas
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Cited by 15 •
2014
Two techniques for isolating cellular lipid droplets from 1) yeast cells and 2) human placentas are presented. The centerpiece of both procedures is density gradient centrifugation, where the resulting floating layer containing the droplets can be readily visualized by eye, extracted, and quantified by Western Blot analysis for purity.
FAQs
The extraction solvent preferentially dissolves lipids while leaving many proteins and other nonlipid components outside the lipid-containing phase. This contrast in solubility allows researchers to separate chemically different portions of a disrupted sample. Efficient recovery therefore depends on exposing cellular material to the solvent and maintaining conditions that support clear partitioning between lipid-rich and nonlipid phases.
Phase separation creates distinct portions containing different classes of sample components, while centrifugation helps clarify and physically separate those portions. Together, these steps reduce contamination from water, proteins, and other nonlipid material before further analysis. Cleaner fractions improve the reliability of chemical measurements and make later concentration or chromatographic separation more informative.
Chromatography can further resolve an isolated lipid fraction after bulk extraction has removed much of the nonlipid material. By separating components within that fraction, researchers can examine lipid composition in greater detail rather than treating all recovered material as one group. This added resolution supports comparisons of membrane composition, pathogen-derived lipids, or lipid changes associated with infection.
A typical workflow begins by disrupting cells, tissues, microorganisms, or biological fluids to release their lipid contents. Researchers then add an organic solvent, separate the resulting phases, and remove residual water and nonlipid components through centrifugation or related cleanup steps. The recovered fraction may be evaporated for concentration or taken directly into chromatography and chemical analysis.
The method is useful when researchers need to examine how infection changes host membranes, identify pathogen-derived lipids, or investigate lipid mediators linked to immune responses. Comparing isolated fractions from different biological conditions can reveal changes associated with host-pathogen interactions. These measurements may support biomarker identification, studies of immune mechanisms, and evaluation of lipid-related therapeutic targets.
Chemical and functional analysis of recovered fractions can show whether infection is associated with altered membrane composition, pathogen-derived lipid production, or changes in lipid mediators. Interpreting these patterns alongside the biological source helps connect lipid changes with host-pathogen interactions and inflammatory signaling. The resulting evidence can guide mechanistic studies and help prioritize candidate biomarkers or therapeutic targets.