Related Experiment Video

Updated: Aug 11, 2026

Long-Term Catheterization of the Intestinal Lymph Trunk and Collection of Lymph in Neonatal Pigs
06:25

Long-Term Catheterization of the Intestinal Lymph Trunk and Collection of Lymph in Neonatal Pigs

Published on: March 5, 2016

The lipoprotein composition of amniotic fluid

D O Gebhardt, A Beintema, F C Reman

    Clinica Chimica Acta; International Journal of Clinical Chemistry
    |May 16, 1979
    PubMed

    The lipoprotein composition of amniotic fluid (AF) has been studied and it was found that it consists of high density lipoprotein (HDL) only. At about the 26th week of pregnancy the HDL content reaches a maximum and decreases thereafter. On crossed immunoelectrophoresis the HDL of AF was separated into two components if the agar layer contained an antiserum against apolipoprotein A-I. The component with the higher electrophoretic mobility (but not the slower moving component) could also be visualized with an antiserum against HDL. When maternal or umbilical cord serum (UCS) was analysed by crossed immunoelectrophoresis using the anti-apoA-I antiserum, we found that they only contained the faster moving lipoprotein component. If UCS was treated with phospholipase A2 and then subjected to crossed immunoelectrophoresis, the slower moving component appeared at the expense of the faster one. Likewise when UCS was incubated with AF from the 15th week of pregnancy or later, the lipoprotein component of UCS with the high mobility was partially converted to the component with the slower mobility. It is concluded that AF probably contains a phospholipase, an enzyme which may promote the onset of labour.

    More Related Videos

    In Vitro Culture of Epithelial Cells from Different Anatomical Regions of the Human Amniotic Membrane10:00

    In Vitro Culture of Epithelial Cells from Different Anatomical Regions of the Human Amniotic Membrane

    Published on: November 28, 2019

    Lumican Extraction from Amniotic Membrane and Determination of its Storage Temperature04:21

    Lumican Extraction from Amniotic Membrane and Determination of its Storage Temperature

    Published on: October 14, 2022

    Related Concept Videos

    Fluid Mosaic Model01:34

    Fluid Mosaic Model

    The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.LipidsThe most...
    Membrane Fluidity01:23

    Membrane Fluidity

    Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
    Membrane Fluidity01:26

    Membrane Fluidity

    Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
    Mosaic nature of the membrane
    The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...
    Transcytosis of IgG01:15

    Transcytosis of IgG

    Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
    IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
    Composition of Blood Plasma01:24

    Composition of Blood Plasma

    Blood plasma is a fluid that contains approximately 92% water and 8% solutes. The solutes include various types of proteins, which constitute about 7% of the total solutes in the plasma. The high-molecular-weight proteins—albumins, globulins, and fibrinogen—are essential to plasma function. Albumins, making up about 60% of the plasma proteins, maintain the osmotic balance within blood vessels by preventing excessive water leakage. Additionally, albumins serve as carrier proteins, binding to...
    Composition of Body Fluids01:29

    Composition of Body Fluids

    Water functions as a solvent accommodating various solutes, which can be categorized under electrolytes and non-electrolytes. Non-electrolytes are usually held together by covalent bonds, restricting them from dissociating in solution, thereby leading to a lack of electrically charged components upon dissolving in water. They are predominantly organic molecules, such as glucose, creatinine, and urea. Electrolytes, on the other hand, are compounds that can break down into ions in water.