Liposomes are spherical vesicles quite variable in size (one nanometer to a few microns), which are capable of storing and transporting various kinds of substances, thus permitting its operation as a gene vector.

    Structurally, liposomes are constituted by a phospholipid bilayer membrane with an amphipathic, very similar to those found in most cells in the human body, allowing a very easy interaction between liposomes and cells.

In addition, this property also allows the incorporation of water soluble substances in its interior (thanks to the hydrophilic moiety) or amphiphilic and lipophilic substances in their membrane.

    Besides this, it is possible to place in the liposomal membrane molecules that selectively recognize and bind to antigens, overexpressed receptors or receptors selectively expressed such as antibodies or low-weight molecules such as peptides or carbohydrates, thus increasing the liposome-targeted cell interactions.

    These features, combined with the fact that they are nontoxic, biodegradable and can be prepared in large amounts, makes liposomes easily stored and easily deliver the desired molecular compound fabrics, without incurring many risks.